阅读说明：本技术 一种抽滤网用高强度框架及其加工工艺 (High-strength frame for suction filtration net and processing technology thereof ) 是由 蔡传鑫 徐新 蔡玮泽 徐星星 陈志坚 李龙 何春敏 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种抽滤网用高强度框架,具体涉及空调滤网框架技术领域,包括按重量百分数计的如下元素：铜1.5-3.5％、硅10.4-16.2％、碳1-1.5％、镁0.8-1.5％、铬0.2-0.8％、镍0.8-1.5％、钛3.6-5.5％、硼0.3-1.2％、钐0.05-0.15％、钴0.05-0.15％、锶0.001-0.045％,余量为铝。本发明通过加入镍、钛、硼能够有效提高框架的弹性,通过稀土元素钐能够有效提高铝合金的耐热性,而镍、钴和钐能够细化铝合金内部的晶粒,减少二次晶间距,减少合金中的气体和夹杂,并使夹杂相趋于球化,有利于浇注成锭,使得铝合金的力学性能较好,通过加入锶能减小铝合金内初晶硅粒子尺寸,改善塑性加工性能,提高框架的力学性能,本发明生产的滤网框架具有较高的强度和弹性,既方便滤网框架的安装,又能够提高滤网框架的使用寿命。(The invention discloses a high-strength frame for a suction filtration net, and particularly relates to the technical field of air conditioner filter screen frames, wherein the high-strength frame comprises the following elements in percentage by weight: 1.5 to 3.5 percent of copper, 10.4 to 16.2 percent of silicon, 1 to 1.5 percent of carbon, 0.8 to 1.5 percent of magnesium, 0.2 to 0.8 percent of chromium, 0.8 to 1.5 percent of nickel, 3.6 to 5.5 percent of titanium, 0.3 to 1.2 percent of boron, 0.05 to 0.15 percent of samarium, 0.05 to 0.15 percent of cobalt, 0.001 to 0.045 percent of strontium and the balance of aluminum. According to the invention, the elasticity of the frame can be effectively improved by adding nickel, titanium and boron, the heat resistance of the aluminum alloy can be effectively improved by using the rare earth element samarium, the nickel, cobalt and samarium can refine crystal grains in the aluminum alloy, the secondary crystal spacing is reduced, the gas and impurities in the alloy are reduced, the impurity phase tends to be spheroidized, and the ingot casting is facilitated, so that the mechanical property of the aluminum alloy is better, the size of primary crystal silicon particles in the aluminum alloy can be reduced by adding strontium, the plastic processing property is improved, and the mechanical property of the frame is improved.)

1. The utility model provides a high strength frame for suction filtration net which characterized in that: comprises the following elements in percentage by weight: 1.5 to 3.5 percent of copper, 10.4 to 16.2 percent of silicon, 1 to 1.5 percent of carbon, 0.8 to 1.5 percent of magnesium, 0.2 to 0.8 percent of chromium, 0.8 to 1.5 percent of nickel, 3.6 to 5.5 percent of titanium, 0.3 to 1.2 percent of boron, 0.05 to 0.15 percent of samarium, 0.05 to 0.15 percent of cobalt, 0.001 to 0.045 percent of strontium and the balance of aluminum.

2. The high-strength frame for suction filtration net according to claim 1, characterized in that: comprises the following elements in percentage by weight: 2-3% of copper, 12.4-14.2% of silicon, 1.2-1.3% of carbon, 1-1.2% of magnesium, 0.4-0.6% of chromium, 1-1.3% of nickel, 4-5% of titanium, 0.6-0.8% of boron, 0.08-0.12% of samarium, 0.08-0.12% of cobalt, 0.02-0.025% of strontium and the balance of aluminum.

3. The high-strength frame for suction filtration net according to claim 1, characterized in that: comprises the following elements in percentage by weight: 2.5% of copper, 13.3% of silicon, 1.25% of carbon, 1.2% of magnesium, 0.5% of chromium, 1.2% of nickel, 4.5% of titanium, 0.75% of boron, 0.1% of samarium, 0.01% of cobalt, 0.025% of strontium and the balance of aluminum.

4. The high-strength frame for suction filtration net according to claim 1, characterized in that: magnesium, chromium, nickel, titanium, boron, cobalt, strontium are added through the mode of almag intermediate alloy, aluminium chromium intermediate alloy, aluminium nickel intermediate alloy, aluminium titanium intermediate alloy, aluminium boron intermediate alloy, aluminium cobalt intermediate alloy and aluminium strontium intermediate alloy respectively, copper, silicon, carbon, samarium, aluminium are added through the mode of red copper, metallic silicon, carbon, metallic samarium powder and aluminium ingot respectively.

5. The process for manufacturing a high-strength frame for a suction filtration net according to any one of claims 1 to 4, wherein: the preparation method comprises the following specific steps:

the method comprises the following steps: respectively weighing an aluminum-copper intermediate alloy, metal silicon, carbon, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, samarium powder, an aluminum-cobalt intermediate alloy, an aluminum-strontium intermediate alloy and an aluminum ingot according to the raw materials of the high-strength frame for the filter screen for standby;

step two: heating and melting the aluminum ingot weighed in the step one at 750-;

step three: blowing a refining agent into 2/3 parts of the molten surface of the second molten metal by nitrogen for refining, standing for 18-23min after refining for skimming the scum on the upper surface of the molten surface, then cooling the second molten metal to 760-780 ℃, adding metal silicon and carbon into the second molten metal, blowing the refining agent into 2/3 parts of the molten surface by nitrogen after the metal silicon and carbon are completely molten for refining, and standing for 15-20min after refining for skimming the scum on the upper surface of the molten surface to obtain aluminum alloy molten metal;

step four: pouring the aluminum alloy molten metal obtained in the third step into a forming die of a frame for the suction filtration net, cooling and forming after pouring, and then deburring and polishing the formed frame;

step five: and (3) carrying out solid solution treatment on the frame subjected to deburring and polishing treatment in the fourth step, placing the frame subjected to solid solution treatment into a homogenizing furnace for homogenization treatment, carrying out aging treatment after the homogenization treatment, and obtaining the high-strength frame for the pumping filter screen after the aging treatment.

6. The processing technology of the high-strength frame for the suction filtration net, according to claim 5, is characterized in that: in the first step, the mass of the aluminum-copper intermediate alloy, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy is respectively weighed according to the weight percentage of copper, magnesium, chromium, nickel, titanium, boron, cobalt and strontium.

7. The processing technology of the high-strength frame for the suction filtration net, according to claim 5, is characterized in that: and in the second step, preheating treatment is carried out before adding the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy into the molten aluminum ingot, wherein the preheating temperature is 180-250 ℃, the heating rate is 10-15 ℃/min when the temperature is increased to 1000-1050 ℃, red copper is added after the temperature is increased to 1000-1050 ℃, samarium powder is added after the red copper is completely melted, and the second molten metal is obtained after the samarium powder is melted.

8. The processing technology of the high-strength frame for the suction filtration net, according to claim 5, is characterized in that: in the third step, the refining agent is RJ-5 solvent, the refining time is 10-15min, the addition amount of the refining agent is 1-1.5% of the weight of the melt, and the cooling rate when the temperature is reduced to 760-780 ℃ is 20-25 ℃/min.

9. The processing technology of the high-strength frame for the suction filtration net, according to claim 5, is characterized in that: in the fourth step, the aluminum alloy metal liquid is required to be subjected to preheating treatment on the forming die before being poured into the forming die, and the preheating treatment temperature is 200-260 ℃.

10. The processing technology of the high-strength frame for the suction filtration net, according to claim 5, is characterized in that: and in the step five, heating the cooled and formed frame to 580-plus-660 ℃ for heat preservation for 3-5h during solution treatment, cooling to room temperature after solution treatment is completed, and then performing homogenization treatment, wherein the temperature during homogenization treatment is 500-plus-550 ℃, the treatment time is 3-5h, the aging treatment is low-temperature aging treatment, the temperature during aging treatment is 150-plus-200 ℃, the treatment time is 24-48h, and after the aging treatment is completed, air cooling to room temperature is performed to obtain the high-strength frame for pumping the filter screen.

Technical Field

The invention relates to the technical field of air conditioner filter screen frames, in particular to a high-strength frame for a suction filtration screen and a processing technology thereof.

Background

The combined air conditioning unit is a special device with the functions of cooling, heating, humidifying, purifying, conveying and the like for air, is an important component of a central air conditioning system, and is widely applied to industries such as commerce, medicine, electronics and the like. The filter screen in the air conditioning unit is indispensable equipment, and the filter screen is applicable to filtration, sewage filtration system etc..

The filter screen of the air conditioning unit is generally installed in a filter screen frame, and then the filter screen frame is clamped into the air conditioning unit. The existing filter screen frame is divided into a metal frame and a plastic frame, the plastic frame has good elasticity and is convenient to mount, but the filter screen frame has low strength and insufficient heat resistance, so that the service life of the filter screen frame is short; the metal frame is good in strength and long in service life, but the elasticity is insufficient, so that the filter screen frame is inconvenient to mount.

Disclosure of Invention

In order to overcome the above defects in the prior art, embodiments of the present invention provide a high strength frame for a suction filtration net and a processing process thereof, and the present invention aims to solve the following problems: on the premise of ensuring the strength of the filter screen frame, the elasticity of the filter screen frame is improved, and the filter screen frame is convenient to mount.

In order to achieve the purpose, the invention provides the following technical scheme: a high-strength frame for a suction filtration net comprises the following elements in percentage by weight: 1.5 to 3.5 percent of copper, 10.4 to 16.2 percent of silicon, 1 to 1.5 percent of carbon, 0.8 to 1.5 percent of magnesium, 0.2 to 0.8 percent of chromium, 0.8 to 1.5 percent of nickel, 3.6 to 5.5 percent of titanium, 0.3 to 1.2 percent of boron, 0.05 to 0.15 percent of samarium, 0.05 to 0.15 percent of cobalt, 0.001 to 0.045 percent of strontium and the balance of aluminum.

In a preferred embodiment, the following elements are included in weight percent: 2-3% of copper, 12.4-14.2% of silicon, 1.2-1.3% of carbon, 1-1.2% of magnesium, 0.4-0.6% of chromium, 1-1.3% of nickel, 4-5% of titanium, 0.6-0.8% of boron, 0.08-0.12% of samarium, 0.08-0.12% of cobalt, 0.02-0.025% of strontium and the balance of aluminum.

In a preferred embodiment, the following elements are included in weight percent: 2.5% of copper, 13.3% of silicon, 1.25% of carbon, 1.2% of magnesium, 0.5% of chromium, 1.2% of nickel, 4.5% of titanium, 0.75% of boron, 0.1% of samarium, 0.01% of cobalt, 0.025% of strontium and the balance of aluminum.

In a preferred embodiment, the magnesium, chromium, nickel, titanium, boron, cobalt, strontium are added by means of an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, an aluminum-cobalt intermediate alloy, and an aluminum-strontium intermediate alloy, respectively, and the copper, silicon, carbon, samarium, and aluminum are added by means of red copper, metallic silicon, carbon, metallic samarium powder, and aluminum ingot, respectively.

The invention also provides a processing technology of the high-strength frame for the suction filtration net, which comprises the following specific preparation steps:

the method comprises the following steps: respectively weighing an aluminum-copper intermediate alloy, metal silicon, carbon, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, samarium powder, an aluminum-cobalt intermediate alloy, an aluminum-strontium intermediate alloy and an aluminum ingot according to the raw materials of the high-strength frame for the filter screen for standby;

step two: heating and melting the aluminum ingot weighed in the step one at 750-;

step three: blowing a refining agent into 2/3 parts of the molten surface of the second molten metal by nitrogen for refining, standing for 18-23min after refining for skimming the scum on the upper surface of the molten surface, then cooling the second molten metal to 760-780 ℃, adding metal silicon and carbon into the second molten metal, blowing the refining agent into 2/3 parts of the molten surface by nitrogen after the metal silicon and carbon are completely molten for refining, and standing for 15-20min after refining for skimming the scum on the upper surface of the molten surface to obtain aluminum alloy molten metal;

step four: pouring the aluminum alloy molten metal obtained in the third step into a forming die of a frame for the suction filtration net, cooling and forming after pouring, and then deburring and polishing the formed frame;

step five: and (3) carrying out solid solution treatment on the frame subjected to deburring and polishing treatment in the fourth step, placing the frame subjected to solid solution treatment into a homogenizing furnace for homogenization treatment, carrying out aging treatment after the homogenization treatment, and obtaining the high-strength frame for the pumping filter screen after the aging treatment.

In a preferred embodiment, in the first step, the mass of the aluminum-copper intermediate alloy, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy is respectively weighed according to the weight percentage of copper, magnesium, chromium, nickel, titanium, boron, cobalt and strontium.

In a preferred embodiment, in the second step, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy are preheated before being added into the molten aluminum ingot, the preheating temperature is 180-250 ℃, the temperature rise rate is 10-15 ℃/min when the temperature is increased to 1000-1050 ℃, red copper is added after the temperature is increased to 1000-1050 ℃, samarium powder is added after the red copper is completely molten, and the second molten metal is obtained after the samarium powder is molten.

In a preferred embodiment, the refining agent in the third step is RJ-5 solvent, the refining time is 10-15min, the addition amount of the refining agent is 1-1.5% of the weight of the melt, and the cooling rate when the temperature is reduced to 760-780 ℃ is 20-25 ℃/min.

In a preferred embodiment, the aluminum alloy molten metal in the fourth step needs to be preheated to the molding mold before being poured into the molding mold, and the preheating temperature is 200-260 ℃.

In a preferred embodiment, in the solution treatment in the fifth step, the cooled and formed frame is heated to 580-660 ℃ for heat preservation for 3-5h, after the solution treatment is completed and cooled to room temperature, homogenization treatment is performed, the temperature of the homogenization treatment is 500-550 ℃, the treatment time is 3-5h, the aging treatment is low-temperature aging treatment, the temperature of the aging treatment is 150-200 ℃, the treatment time is 24-48h, and after the aging treatment is completed, the frame is air-cooled to room temperature to obtain the high-strength frame for the filter screen.

The invention has the technical effects and advantages that:

1. the high-strength frame for the suction filtration net prepared by adopting the raw material formula is made of an aluminum alloy material, copper, silicon, carbon, magnesium, chromium, nickel, titanium, boron, samarium, cobalt and strontium are added into the aluminum alloy material, a magnesium-silicon strengthening phase can be formed in the aluminum alloy by adding the silicon, the magnesium, the copper and the chromium, so that the frame strength is good, the corrosion resistance of the frame can be improved by the chromium, the elasticity of the frame can be effectively improved by adding the nickel, the titanium and the boron, the heat resistance of the aluminum alloy can be effectively improved by adding a rare earth element samarium, the nickel, the cobalt and the samarium can refine crystal grains in the aluminum alloy, the secondary crystal spacing is reduced, gas and impurities in the alloy are reduced, the phase tends to be spheroidized, an ingot can be cast conveniently, the mechanical property of the aluminum alloy is good, the size of primary crystal silicon particles in the aluminum alloy can be reduced by adding the strontium, the plastic processing property is improved, the mechanical property of the frame is improved;

2. according to the invention, through carrying out solid solution treatment, homogenization treatment and low-temperature aging treatment on the cast frame, the mechanical property of the frame can be better, and the service life of the air conditioner filter screen frame can be effectively prolonged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the invention provides a high-strength frame for a suction filtration net, which comprises the following elements in percentage by weight: 1.5% of copper, 10.4% of silicon, 1% of carbon, 0.8% of magnesium, 0.2% of chromium, 0.8% of nickel, 3.6% of titanium, 0.3% of boron, 0.05% of samarium, 0.05% of cobalt, 0.001% of strontium and the balance of aluminum.

In a preferred embodiment, the magnesium, chromium, nickel, titanium, boron, cobalt, strontium are added by means of an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, an aluminum-cobalt intermediate alloy, and an aluminum-strontium intermediate alloy, respectively, and the copper, silicon, carbon, samarium, and aluminum are added by means of red copper, metallic silicon, carbon, metallic samarium powder, and aluminum ingot, respectively.

The invention also provides a processing technology of the high-strength frame for the suction filtration net, which comprises the following specific preparation steps:

the method comprises the following steps: respectively weighing an aluminum-copper intermediate alloy, metal silicon, carbon, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, samarium powder, an aluminum-cobalt intermediate alloy, an aluminum-strontium intermediate alloy and an aluminum ingot according to the raw materials of the high-strength frame for the filter screen for standby;

step two: heating and melting the aluminum ingot weighed in the first step at 770 ℃, then adding an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, an aluminum-cobalt intermediate alloy and an aluminum-strontium intermediate alloy, continuing to heat and melt to form first molten metal, heating the first molten metal to 1030 ℃, and then adding red copper and samarium powder to melt to obtain second molten metal;

step three: blowing a refining agent into 2/3 parts of the molten surface of the second molten metal by nitrogen for refining, standing for 20min after refining for skimming dross on the upper surface of the molten surface, then cooling the second molten metal to 770 ℃, adding silicon and carbon into the second molten metal, blowing the refining agent into 2/3 parts of the molten surface by nitrogen after the silicon and carbon are completely molten for refining, standing for 18min after refining for skimming dross on the upper surface of the molten surface, and obtaining aluminum alloy molten metal;

step four: pouring the aluminum alloy molten metal obtained in the third step into a forming die of a frame for the suction filtration net, cooling and forming after pouring, and then deburring and polishing the formed frame;

step five: and (3) carrying out solid solution treatment on the frame subjected to deburring and polishing treatment in the fourth step, placing the frame subjected to solid solution treatment into a homogenizing furnace for homogenization treatment, carrying out aging treatment after the homogenization treatment, and obtaining the high-strength frame for the pumping filter screen after the aging treatment.

In a preferred embodiment, in the first step, the mass of the aluminum-copper intermediate alloy, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy is respectively weighed according to the weight percentage of copper, magnesium, chromium, nickel, titanium, boron, cobalt and strontium.

In a preferred embodiment, in the second step, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy are preheated before being added to the molten aluminum ingot, the preheating temperature is 220 ℃, the temperature rising rate is 13 ℃/min when the temperature rises to 1030 ℃, red copper is added after the temperature rises to 1030 ℃, samarium powder is added after the red copper is completely molten, and the second molten metal is obtained after the samarium powder is molten.

In a preferred embodiment, the refining agent in the third step is RJ-5 solvent, the refining time is 15min, the addition amount of the refining agent is 1.3% of the weight of the melt, and the cooling rate when the temperature is reduced to 770 ℃ is 22 ℃/min.

In a preferred embodiment, the aluminum alloy molten metal in the fourth step needs to be preheated before being poured into the forming mold, and the preheating temperature is 240 ℃.

In a preferred embodiment, in the solution treatment in the fifth step, the cooled and formed frame is heated to 620 ℃ for heat preservation for 4 hours, after the solution treatment is completed and cooled to room temperature, homogenization treatment is performed, the temperature for homogenization treatment is 530 ℃, the treatment time is 4 hours, the aging treatment is low-temperature aging treatment, the temperature for aging treatment is 180 ℃, the treatment time is 36 hours, and after the aging treatment is completed, the frame is air-cooled to room temperature, so that the high-strength frame for the filter screen is obtained.

Example 2:

different from the embodiment 1, the invention provides a high-strength frame for a suction filtration net, which comprises the following elements in percentage by weight: 2.5% of copper, 13.3% of silicon, 1.25% of carbon, 1.2% of magnesium, 0.5% of chromium, 1.2% of nickel, 4.5% of titanium, 0.75% of boron, 0.1% of samarium, 0.01% of cobalt, 0.025% of strontium and the balance of aluminum.

Example 3:

different from the embodiments 1-2, the invention provides a high-strength frame for a suction filtration net, which comprises the following elements in percentage by weight: 3.5% of copper, 16.2% of silicon, 1.5% of carbon, 1.5% of magnesium, 0.8% of chromium, 1.5% of nickel, 5.5% of titanium, 1.2% of boron, 0.15% of samarium, 0.15% of cobalt, 0.045% of strontium and the balance of aluminum.

Example 4:

the invention provides a high-strength frame for a suction filtration net, which comprises the following elements in percentage by weight: 1.5% of copper, 10.4% of silicon, 1% of carbon, 0.8% of magnesium, 0.2% of chromium, 0.8% of nickel, 3.6% of titanium, 0.3% of boron, 0.05% of samarium, 0.05% of cobalt, 0.001% of strontium and the balance of aluminum.

In a preferred embodiment, the magnesium, chromium, nickel, titanium, boron, cobalt, strontium are added by means of an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, an aluminum-cobalt intermediate alloy, and an aluminum-strontium intermediate alloy, respectively, and the copper, silicon, carbon, samarium, and aluminum are added by means of red copper, metallic silicon, carbon, metallic samarium powder, and aluminum ingot, respectively.

The invention also provides a processing technology of the high-strength frame for the suction filtration net, which comprises the following specific preparation steps:

the method comprises the following steps: respectively weighing an aluminum-copper intermediate alloy, metal silicon, carbon, an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, samarium powder, an aluminum-cobalt intermediate alloy, an aluminum-strontium intermediate alloy and an aluminum ingot according to the raw materials of the high-strength frame for the filter screen for standby;

step two: heating and melting the aluminum ingot weighed in the first step at 770 ℃, then adding an aluminum-magnesium intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-boron intermediate alloy, an aluminum-cobalt intermediate alloy and an aluminum-strontium intermediate alloy, continuing to heat and melt to form first molten metal, heating the first molten metal to 1030 ℃, and then adding red copper and samarium powder to melt to obtain second molten metal;

step three: blowing a refining agent into 2/3 parts of the molten surface of the second molten metal by nitrogen for refining, standing for 20min after refining for skimming dross on the upper surface of the molten surface, then cooling the second molten metal to 770 ℃, adding silicon and carbon into the second molten metal, blowing the refining agent into 2/3 parts of the molten surface by nitrogen after the silicon and carbon are completely molten for refining, standing for 18min after refining for skimming dross on the upper surface of the molten surface, and obtaining aluminum alloy molten metal;

step four: and (3) pouring the aluminum alloy molten metal obtained in the third step into a forming die of the frame for the suction filtration screen, cooling and forming after pouring, and then deburring and polishing the formed frame to obtain the high-strength frame for the suction filtration screen.

In a preferred embodiment, in the first step, the mass of the aluminum-copper intermediate alloy, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy is respectively weighed according to the weight percentage of copper, magnesium, chromium, nickel, titanium, boron, cobalt and strontium.

In a preferred embodiment, in the second step, the aluminum-magnesium intermediate alloy, the aluminum-chromium intermediate alloy, the aluminum-nickel intermediate alloy, the aluminum-titanium intermediate alloy, the aluminum-boron intermediate alloy, the aluminum-cobalt intermediate alloy and the aluminum-strontium intermediate alloy are preheated before being added to the molten aluminum ingot, the preheating temperature is 220 ℃, the temperature rising rate is 13 ℃/min when the temperature rises to 1030 ℃, red copper is added after the temperature rises to 1030 ℃, samarium powder is added after the red copper is completely molten, and the second molten metal is obtained after the samarium powder is molten.

In a preferred embodiment, the refining agent in the third step is RJ-5 solvent, the refining time is 15min, the addition amount of the refining agent is 1.3% of the weight of the melt, and the cooling rate when the temperature is reduced to 770 ℃ is 22 ℃/min.

In a preferred embodiment, the aluminum alloy molten metal in the fourth step needs to be preheated before being poured into the forming mold, and the preheating temperature is 240 ℃.

The high strength frames for suction filtration nets prepared in the above examples 1 to 4 were respectively used as an experimental group 1, an experimental group 2, an experimental group 3 and an experimental group 4, a commercially available aluminum alloy screen frame was used as a control group, and then tensile strength (MPa), yield strength (MPa), elongation (%) and elastic modulus (GPa) were performed on the screen frames of the experimental group and the control group, and the test results are as shown in table one:

	tensile strength	Yield strength	Elongation percentage	Modulus of elasticity
					Experimental group 1	684	667	17.5	89
Experimental group 2	725	718	18.2	96
					Experimental group 3	718	686	17.9	92
Experimental group 4	569	542	16.1	80
					Control group	423	392	14.8	60

Watch 1

As can be seen from the table I, compared with the traditional commercially available frame for the air conditioner filter screen, the high-strength frame for the suction filter screen has the advantages that the tensile strength, the yield strength and the elongation are improved, the elastic modulus is high, the service life of the frame for the air conditioner filter screen is long, and the frame is convenient to install, compared with the embodiment 1, in the embodiment 4, the frame after casting molding is not subjected to solid solution treatment, homogenization treatment and low-temperature aging treatment, so that the mechanical property and the elastic modulus of the frame produced in the embodiment 4 are higher than those of the traditional commercially available frame, but the mechanical property and the elastic modulus of the frame produced in the embodiment 1 are obviously reduced; the aluminum alloy is made of an aluminum alloy material, copper, silicon, carbon, magnesium, chromium, nickel, titanium, boron, samarium, cobalt and strontium are added into the aluminum alloy material, a magnesium-silicon strengthening phase can be formed in the aluminum alloy by adding the silicon, the magnesium, the copper and the chromium, so that the frame strength is good, the corrosion resistance of the frame can be improved by the chromium, the elasticity of the frame can be effectively improved by adding the nickel, the titanium and the boron, the heat resistance of the aluminum alloy can be effectively improved by rare earth element samarium, the crystal grains in the aluminum alloy can be refined by the nickel, the cobalt and the samarium, the secondary crystal spacing is reduced, the gas and impurities in the alloy are reduced, the impurity phase tends to be spheroidized, the ingot casting is facilitated, the mechanical property of the aluminum alloy is good, the size of primary crystal silicon particles in the aluminum alloy can be reduced by adding the strontium, the plastic processing property is improved, and the mechanical property of the frame is improved; the filter screen frame produced by the invention has higher strength and elasticity, is convenient to install, and can prolong the service life of the filter screen frame.

And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.