阅读说明：本技术 一种zl101a铝液的熔化方法 (Method for melting ZL101A aluminum liquid ) 是由 陈风岗 于 2021-06-29 设计创作，主要内容包括：本发明公开了一种ZL101A铝液的熔化方法,包括以下工序：a)坩锅预热工序；b)熔化工序；c)除气精炼工序：将b)熔化工序中熔化好的铝液倒入保温炉,再用精炼剂精炼,清除熔渣,除气机吹氩气,流量以料不溢出为准,处理温度不超过700℃以上,检验含气,如含气继续吹氩气,即可。本发明与现有技术相比,回炉料在总原料的用量为25-30％,可以极大的降低成本,铝液的除杂率为0.05％,抗拉强度为188Mpa。(The invention discloses a method for melting ZL101A aluminum liquid, which comprises the following steps: a) preheating a crucible; b) a melting process; c) degassing and refining: pouring molten aluminum in the melting procedure of b) into a holding furnace, refining by using a refining agent, removing slag, blowing argon by using a degasser, checking gas content if the gas content continues to blow argon, wherein the flow rate is based on that the material does not overflow, the treatment temperature is not higher than 700 ℃. Compared with the prior art, the invention has the advantages that the consumption of the scrap returns is 25-30% of the total raw materials, the cost can be greatly reduced, the impurity removal rate of aluminum liquid is 0.05%, and the tensile strength is 188 Mpa.)

1. A method for melting ZL101A aluminum liquid comprises the following steps:

a) preheating a crucible:

b) a melting process: adding a flux into an aluminum ingot (second aluminum), an aluminum-silicon alloy (30%), a magnesium ingot (Mg-3), an aluminum-titanium alloy and a foundry returns for melting;

c) degassing and refining: pouring molten aluminum in the melting procedure of b) into a holding furnace, refining by using a refining agent, removing slag, blowing argon by using a degasser, checking gas content if the gas content continues to blow argon, wherein the flow rate is based on that the material does not overflow, the treatment temperature is not higher than 700 ℃.

2. The method for melting ZL101A aluminum liquid as defined in claim 1, wherein:

the b) melting process comprises the following steps: the charging sequence is as follows: firstly, loading aluminum ingots, aluminum-silicon alloy, aluminum-titanium alloy and foundry returns, melting and then adding magnesium ingots.

3. The method for melting ZL101A aluminum liquid as defined in claim 1, wherein:

the b) melting process comprises the following steps: if the material is pressed at night, the temperature is reduced, and an aluminum ingot or a returned material is added into the furnace, the temperature is reduced to 580 ℃ and the mixture is slightly stirred.

4. The method for melting ZL101A aluminum liquid as defined in claim 1, wherein:

the b) melting process comprises the following steps: the smelting temperature does not exceed 760 ℃.

5. The method for melting ZL101A aluminum liquid as defined in claim 1, wherein:

in the step b) of melting, the flux contains the following substances in parts by weight:

6. the method for melting ZL101A aluminum liquid as defined in claim 5, wherein: the addition amount of the flux is 1%.

7. The method for melting ZL101A aluminum liquid as defined in claim 1, wherein: the consumption of the foundry returns in the total raw materials is 25-30%.

Technical Field

The invention belongs to a casting method, in particular to the technical field of a melting method of aluminum liquid.

Background

The sand casting has the advantages of rich raw material sources, no limitation on production batch and casting size, low cost and the most common casting method, and the sand casting currently accounts for about 70 percent of the total production of the casting. The design of a core making and pouring system is required in sand casting. The primary function of coremaking is to form the internal cavity or local contour of the casting. When in single-piece and small-batch production, manual core making is adopted, and when in large-batch production, machine core making is adopted. Core box making is commonly adopted in manual core making. In order to improve the strength of the core, an iron wire or a cast iron rod can be placed as a core rod during core making; in order to improve the air permeability of the core, the air holes can be formed by pricking the air holes with needles or embedding wax wires.

The gating system is a series of channels that open up into the mold to fill the cavity and risers. The casting mold is generally composed of a pouring cup, a sprue, a cross gate, an ingate and a riser, and is used for receiving and guiding molten metal, controlling the flowing direction and speed of the molten metal and enabling the molten metal to stably fill a cavity; adjusting the temperature distribution of each part of the casting; and blocking the inclusion from entering the die cavity.

The commonly used molten metal is ZL101A aluminum liquid, and is formed by melting an aluminum ingot (No. two aluminum), an aluminum-silicon alloy (30%), a magnesium ingot (Mg-3), an aluminum-titanium alloy and a scrap return, wherein the commonly used scrap return is the scrap return with the same grade of the furnace, and comprises waste parts, a dead head, a pouring gate, cutting scraps and splashing blocks, the scrap return cannot be mixed with impurities (such as sand and organic substances), and the insert blocks are removed for the casting with the insert blocks. Due to the use of the foundry returns, the impurities in the aluminum liquid are more, and pores and cracks are easy to generate in the melting process.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for melting ZL101A aluminum liquid with less impurities.

The technical scheme for solving the technical problem of the invention is as follows: a method for melting ZL101A aluminum liquid comprises the following steps:

a) preheating a crucible:

b) a melting process: adding flux into aluminum ingot (second aluminum), aluminum-silicon alloy (30%), magnesium ingot (Mg-3), aluminum-titanium alloy and foundry returns for melting

The b) melting process comprises the following steps: the charging sequence is as follows: firstly, loading aluminum ingots, aluminum-silicon alloy, aluminum-titanium alloy and foundry returns, melting and then adding magnesium ingots.

The b) melting process comprises the following steps: if the material is pressed at night, the temperature reduction treatment is needed, and an aluminum ingot or a foundry returns are added into the furnace, the temperature is reduced to 580 ℃ (semi-solidified state) and the mixture is slightly stirred.

The b) melting process comprises the following steps: the smelting temperature does not exceed 760 ℃.

c) Degassing and refining: pouring molten aluminum in the melting procedure of b) into a holding furnace, refining by using a refining agent, removing slag, blowing argon by using a degasser, checking gas content if the gas content continues to blow argon, wherein the flow rate is based on that the material does not overflow, the treatment temperature is not higher than 700 ℃.

In the step b) of melting, the flux contains the following substances in parts by weight:

the addition amount of the flux is 1%.

The refining agent used was a commercially available refining agent.

The consumption of the foundry returns in the total raw materials is 25-30%.

Compared with the prior art, the invention has the advantages that the consumption of the scrap returns is 25-30% of the total raw materials, the cost can be greatly reduced, the impurity removal rate of aluminum liquid is 0.05%, and the tensile strength is 188 Mpa.

Detailed Description

The present invention will be described in detail with reference to examples.

Example 1:

a method for melting ZL101A aluminum liquid comprises the following steps:

a) preheating a crucible:

b) a melting process: adding flux into aluminum ingot (second aluminum), aluminum-silicon alloy (30%), magnesium ingot (Mg-3), aluminum-titanium alloy and foundry returns for melting

The b) melting process comprises the following steps: the charging sequence is as follows: firstly, loading aluminum ingots, aluminum-silicon alloy, aluminum-titanium alloy and foundry returns, melting and then adding magnesium ingots.

The b) melting process comprises the following steps: the smelting temperature does not exceed 760 ℃.

c) Degassing and refining: pouring molten aluminum in the melting procedure of b) into a holding furnace, refining by using a refining agent, removing slag, blowing argon by using a degasser, checking gas content if the gas content continues to blow argon, wherein the flow rate is based on that the material does not overflow, the treatment temperature is not higher than 700 ℃.

In the step b) of melting, the flux contains the following substances in parts by weight:

the addition amount of the flux is 1%.

The refining agent used was a commercially available refining agent.

The consumption of the scrap returns in the total raw materials is 25 percent,

example 2

A method for melting ZL101A aluminum liquid comprises the following steps:

a) preheating a crucible:

b) a melting process: adding flux into aluminum ingot (second aluminum), aluminum-silicon alloy (30%), magnesium ingot (Mg-3), aluminum-titanium alloy and foundry returns for melting

The b) melting process comprises the following steps: the raw material is pressed at night, and must be cooled, and the aluminium ingot or the foundry returns are added into the furnace, and the temperature is reduced to 580 deg.C (semi-solidified state) and slightly stirred.

The b) melting process comprises the following steps: the smelting temperature does not exceed 760 ℃.

c) Degassing and refining: pouring molten aluminum in the melting procedure of b) into a holding furnace, refining by using a refining agent, removing slag, blowing argon by using a degasser, checking gas content if the gas content continues to blow argon, wherein the flow rate is based on that the material does not overflow, the treatment temperature is not higher than 700 ℃.

In the step b) of melting, the flux contains the following substances in parts by weight:

the addition amount of the flux is 1%.

The refining agent used was a commercially available refining agent.

The consumption of the returned materials in the total raw materials is 28 percent.

Example 3

A method for melting ZL101A aluminum liquid comprises the following steps:

a) preheating a crucible:

b) a melting process: adding flux into aluminum ingot (second aluminum), aluminum-silicon alloy (30%), magnesium ingot (Mg-3), aluminum-titanium alloy and foundry returns for melting

The b) melting process comprises the following steps: the charging sequence is as follows: firstly, loading aluminum ingots, aluminum-silicon alloy, aluminum-titanium alloy and foundry returns, melting and then adding magnesium ingots.

The b) melting process comprises the following steps: the smelting temperature does not exceed 760 ℃.

c) Degassing and refining: pouring molten aluminum in the melting procedure of b) into a holding furnace, refining by using a refining agent, removing slag, blowing argon by using a degasser, checking gas content if the gas content continues to blow argon, wherein the flow rate is based on that the material does not overflow, the treatment temperature is not higher than 700 ℃.

In the step b) of melting, the flux contains the following substances in parts by weight:

the addition amount of the flux is 1%.

The consumption of the scrap returns in the total raw materials is 30 percent,

the impurity removal rate of the aluminum liquid of the embodiments 1, 2 and 3 is 0.05 percent, and the tensile strength is 188 Mpa.