阅读说明：本技术 一种高减磨轴承的制备方法 (Preparation method of high-antifriction bearing ) 是由 李明 于 2020-11-29 设计创作，主要内容包括：本发明公开了一种高减磨轴承的制备方法,该方法先将部分原料加入真空气雾化炉中进行熔炼、雾化并筛分粉末,再与其它剩余原料加入到料筒温度在80-100℃的高速混合器中充分混合,然后将混合的粉末置于模具中压制,模压温度250-450℃,压力100-150MPa,保温保压20min,接着将压力提升到250-400MPa,保温保压20min,将压制成形的压坯在还原气氛中烧结热处理,热处理后经浸油处理即可。本发明方法制备得到的轴承具有比市面同类产品更高的强度、硬度、压溃强度以及耐磨性,延长合金件的使用寿命；且原料易得、加工成本低,制备工艺简单、参数易控,生产过程安全环保,适合大规模的工业化生产。(The invention discloses a preparation method of a high antifriction bearing, which comprises the steps of firstly adding part of raw materials into a vacuum gas atomization furnace for smelting, atomizing and screening powder, then adding the powder and other residual raw materials into a high-speed mixer with a charging barrel temperature of 80-100 ℃ for fully mixing, then placing the mixed powder into a mould for pressing, wherein the mould pressing temperature is 250-. The bearing prepared by the method has higher strength, hardness, crushing strength and wear resistance than similar products in the market, and the service life of the alloy part is prolonged; and the raw materials are easy to obtain, the processing cost is low, the preparation process is simple, the parameters are easy to control, and the production process is safe and environment-friendly and is suitable for large-scale industrial production.)

1. A preparation method of a high antifriction bearing is characterized by comprising the following steps:

step 1, weighing the following raw materials in parts by weight: 130-140 parts of copper powder, 30-60 parts of iron powder, 7-9 parts of stainless steel powder, 10-15 parts of kaolin, 5-6 parts of molybdenum disulfide, 4-6 parts of sepiolite fiber, 4-9 parts of boron carbide ceramic powder, 2-15 parts of dimethyl trimethylsilyl methylphosphonate, 10-14 parts of basic nickel carbonate, 3-6 parts of atomized tin powder, 10-14 parts of graphite powder, 5-15 parts of nano aluminum oxide, 6-14 parts of tungsten disulfide, 3-6 parts of zirconium silicate, 6-8 parts of tungsten silicide, 2-3 parts of bayberry wax, 3-8 parts of tin trioxide, 1-6 parts of hafnium boride, 1-4 parts of an aluminate vinegar coupling agent and 1-3 parts of vanadium carbide;

step 2, putting the molybdenum disulfide, the stainless steel powder, the tungsten disulfide, the atomized tin powder, the electrolytic nickel, the copper powder, the nano aluminum oxide, the hafnium boride, the tungsten silicide and the vanadium carbide in the formula in the step 1 into a vacuum induction electromagnetic furnace, and then heating to completely melt the materials; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 3-5MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then adding the powder and other raw materials into a high-speed mixer with a charging barrel at the temperature of 80-100 ℃ for fully mixing;

step 3, placing the fully mixed powder in a mold for pressing, wherein the mold pressing temperature is 250 ℃ and 450 ℃, the pressure is 100 ℃ and 150MPa, and the heat preservation and pressure maintaining are carried out for 20 min;

step 4, increasing the pressure to 250-400MPa, and keeping the temperature and the pressure for 20 min;

step 5, sintering and heat treating the pressed compact in a reducing atmosphere;

and 6, cleaning the sintered pressing piece, and then carrying out oil immersion treatment.

2. The method for manufacturing a high antifriction bearing according to claim 1, characterized in that: in the step 5, the sintering heat treatment comprises: pre-sintering, namely gradually sintering and heating the pressed blank for 0.5-1.5 hours, and heating to 300-500 ℃; primary sintering, and then primary sintering heating to 800-; cooling, and gradually cooling to normal temperature after 0.5-1.5 hours.

3. The method for manufacturing a high antifriction bearing according to claim 1, characterized in that: in the step 1, the following raw materials are weighed according to parts by weight: 135 parts of copper powder, 45 parts of iron powder, 8 parts of stainless steel powder, 13 parts of kaolin, 5.5 parts of molybdenum disulfide, 5 parts of sepiolite fiber, 6 parts of boron carbide ceramic powder, 9 parts of dimethyl trimethylsilyl methylphosphonate, 12 parts of basic nickel carbonate, 5 parts of atomized tin powder, 12 parts of graphite powder, 10 parts of nano aluminum oxide, 10 parts of tungsten disulfide, 4 parts of zirconium silicate, 7 parts of tungsten silicide, 2.5 parts of bayberry wax, 5 parts of tin trioxide, 4 parts of hafnium boride, 3 parts of an aluminate-vinegar coupling agent and 2 parts of vanadium carbide.

4. The method for manufacturing a high antifriction bearing according to claim 1, characterized in that: in the step 2, the raw materials are added into a high-speed mixer with a cylinder temperature of 80-100 ℃ and stirred at a high speed of 2000-3000r/min for 20-30 min.

5. The method for manufacturing a high antifriction bearing according to claim 3, characterized in that: in the step 5, the reducing atmosphere is a mixed gas composed of nitrogen and hydrogen.

Technical Field

The invention relates to a preparation method of a high-friction-reducing bearing.

Technical Field

Antifriction materials are an old and widely used industrial material indispensable in the machine manufacturing industry. Antifriction materials are used to produce various wear-resistant sliding bearings, bushings, piston rings, sliders, slide plates, precision machine tool guides, and the like, with the largest amount of sliding bearings being used. Sliding bearings, bearings that operate under sliding friction. The sliding bearing works stably and reliably without noise. Under the condition of liquid lubrication, the sliding surface is separated by lubricating oil without direct contact, the friction loss and the surface abrasion can be greatly reduced, and the oil film also has certain vibration absorption capacity. The powder metallurgy is not limited by smelting, not only can be added with alloy components, but also can be added with other structural components, and can be adjusted within a quite large range according to requirements, thereby achieving the effect of matching with parts in terms of mechanical properties. The powder metallurgy has high degree of mechanization, can reduce personnel, can improve the efficiency and further saves the cost. Therefore, the invention designs a new powder metallurgy process by optimizing the combination of raw materials and reasonably setting the proportion and the production process, thereby preparing the high antifriction bearing with higher strength, hardness and good wear resistance.

Disclosure of Invention

The invention aims to provide a preparation method of a high-friction-reduction bearing aiming at the defects of the prior art.

The purpose of the invention is realized by the following technical scheme: a preparation method of a high antifriction bearing comprises the following steps:

step 1, weighing the following raw materials in parts by weight: 130-140 parts of copper powder, 30-60 parts of iron powder, 7-9 parts of stainless steel powder, 10-15 parts of kaolin, 5-6 parts of molybdenum disulfide, 4-6 parts of sepiolite fiber, 4-9 parts of boron carbide ceramic powder, 2-15 parts of dimethyl trimethylsilyl methylphosphonate, 10-14 parts of basic nickel carbonate, 3-6 parts of atomized tin powder, 10-14 parts of graphite powder, 5-15 parts of nano aluminum oxide, 6-14 parts of tungsten disulfide, 3-6 parts of zirconium silicate, 6-8 parts of tungsten silicide, 2-3 parts of bayberry wax, 3-8 parts of tin trioxide, 1-6 parts of hafnium boride, 1-4 parts of an aluminate vinegar coupling agent and 1-3 parts of vanadium carbide;

step 2, putting the molybdenum disulfide, the stainless steel powder, the tungsten disulfide, the atomized tin powder, the electrolytic nickel, the copper powder, the nano aluminum oxide, the hafnium boride, the tungsten silicide and the vanadium carbide in the formula in the step 1 into a vacuum induction electromagnetic furnace, and then heating to completely melt the materials; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 3-5MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then adding the powder and other raw materials into a high-speed mixer with a charging barrel at the temperature of 80-100 ℃ for fully mixing;

step 3, placing the fully mixed powder in a mold for pressing, wherein the mold pressing temperature is 250 ℃ and 450 ℃, the pressure is 100 ℃ and 150MPa, and the heat preservation and pressure maintaining are carried out for 20 min;

step 4, increasing the pressure to 250-400MPa, and keeping the temperature and the pressure for 20 min;

step 5, sintering and heat treating the pressed compact in a nitrogen and hydrogen reducing atmosphere;

and 6, cleaning the sintered pressing piece, and then carrying out oil immersion treatment.

In the step 5, the sintering heat treatment comprises: pre-sintering, namely gradually sintering and heating the pressed blank for 0.5-1.5 hours, and heating to 300-500 ℃; primary sintering, and then primary sintering heating to 800-; cooling, and gradually cooling to normal temperature after 0.5-1.5 hours.

In the step 1, the following raw materials are weighed according to parts by weight: 135 parts of copper powder, 45 parts of iron powder, 8 parts of stainless steel powder, 13 parts of kaolin, 5.5 parts of molybdenum disulfide, 5 parts of sepiolite fiber, 6 parts of boron carbide ceramic powder, 9 parts of dimethyl trimethylsilyl methylphosphonate, 12 parts of basic nickel carbonate, 5 parts of atomized tin powder, 12 parts of graphite powder, 10 parts of nano aluminum oxide, 10 parts of tungsten disulfide, 4 parts of zirconium silicate, 7 parts of tungsten silicide, 2.5 parts of bayberry wax, 5 parts of tin trioxide, 4 parts of hafnium boride, 3 parts of an aluminate-vinegar coupling agent and 2 parts of vanadium carbide.

In the step 2, the raw materials are added into a high-speed mixer with a cylinder temperature of 80-100 ℃ and stirred at a high speed of 2000-3000r/min for 20-30 min.

In the step 5, the reducing atmosphere is a mixed gas composed of nitrogen and hydrogen.

The invention has the following beneficial effects: the bearing prepared by the method has higher strength, hardness, crushing strength and wear resistance than similar products in the market, and the service life of the alloy part is prolonged; and the raw materials are easy to obtain, the processing cost is low, the preparation process is simple, the parameters are easy to control, and the production process is safe and environment-friendly and is suitable for large-scale industrial production.

Detailed Description

Example 1

A preparation method of a high antifriction bearing comprises the following steps:

step 1, weighing the following raw materials in parts by weight: 130 parts of copper powder, 30 parts of iron powder, 7 parts of stainless steel powder, 10-15 parts of kaolin, 5 parts of molybdenum disulfide, 4 parts of sepiolite fiber, 4 parts of boron carbide ceramic powder, 2 parts of dimethyl trimethylsilyl methylphosphonate, 10 parts of basic nickel carbonate, 3 parts of atomized tin powder, 10 parts of graphite powder, 5 parts of nano aluminum oxide, 6 parts of tungsten disulfide, 3 parts of zirconium silicate, 6 parts of tungsten silicide, 2 parts of bayberry wax, 3 parts of tin trioxide, 1 part of hafnium boride, 1 part of aluminate-vinegar coupling agent and 1 part of vanadium carbide;

step 2, putting the molybdenum disulfide, the stainless steel powder, the tungsten disulfide, the atomized tin powder, the electrolytic nickel, the copper powder, the nano aluminum oxide, the hafnium boride, the tungsten silicide and the vanadium carbide in the formula in the step 1 into a vacuum induction electromagnetic furnace, and then heating to completely melt the materials; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 3MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then adding the powder and other raw materials into a high-speed mixer with a charging barrel at the temperature of 80 ℃, and stirring at a high speed of 2000r/min for 20-30 min;

step 3, placing the fully mixed powder in a mould for pressing, wherein the mould pressing temperature is 250 ℃, the pressure is 100-150MPa, and the heat preservation and pressure maintaining are carried out for 20 min;

step 4, increasing the pressure to 250MPa, and keeping the temperature and the pressure for 20 min;

and 5, sintering and heat treating the pressed and formed compact in a nitrogen and hydrogen reducing atmosphere, wherein the sintering and heat treating comprises the following steps: pre-sintering, namely gradually sintering and heating the pressed blank for 0.5 hour, and heating to 300 ℃; main sintering, heating to 800 ℃ and keeping the temperature for 0.5 hour; cooling, and then gradually cooling to normal temperature after 0.5 hour;

and 6, cleaning the sintered pressing piece, and then carrying out oil immersion treatment.

Example 2

A preparation method of a high antifriction bearing comprises the following steps:

step 1, weighing the following raw materials in parts by weight: 135 parts of copper powder, 45 parts of iron powder, 8 parts of stainless steel powder, 13 parts of kaolin, 5.5 parts of molybdenum disulfide, 5 parts of sepiolite fiber, 6 parts of boron carbide ceramic powder, 9 parts of dimethyl trimethylsilyl methylphosphonate, 12 parts of basic nickel carbonate, 5 parts of atomized tin powder, 12 parts of graphite powder, 10 parts of nano aluminum oxide, 10 parts of tungsten disulfide, 4 parts of zirconium silicate, 7 parts of tungsten silicide, 2.5 parts of bayberry wax, 5 parts of tin trioxide, 4 parts of hafnium boride, 3 parts of an aluminate-vinegar coupling agent and 2 parts of vanadium carbide;

step 2, putting the molybdenum disulfide, the stainless steel powder, the tungsten disulfide, the atomized tin powder, the electrolytic nickel, the copper powder, the nano aluminum oxide, the hafnium boride, the tungsten silicide and the vanadium carbide in the formula in the step 1 into a vacuum induction electromagnetic furnace, and then heating to completely melt the materials; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 4MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then adding the powder and other raw materials into a high-speed mixer with a charging barrel at 90 ℃, and stirring at a high speed of 2500r/min for 25 min;

step 3, putting the fully mixed powder into a die for pressing, wherein the die pressing temperature is 350 ℃, the pressure is 120MPa, and the heat preservation and pressure maintaining are carried out for 20 min;

step 4, increasing the pressure to 300MPa, and keeping the temperature and the pressure for 20 min;

and 5, sintering and heat treating the pressed and formed compact in a nitrogen and hydrogen reducing atmosphere, wherein the sintering and heat treating comprises the following steps: pre-sintering, namely gradually sintering and heating the pressed blank for 1 hour, and heating to 400 ℃; main sintering, heating to 880 ℃ and keeping the temperature for 1 hour; cooling, and then gradually cooling to normal temperature after 1 hour;

and 6, cleaning the sintered pressing piece, and then carrying out oil immersion treatment.

Example 3

A preparation method of a high antifriction bearing comprises the following steps:

step 1, weighing the following raw materials in parts by weight: 140 parts of copper powder, 60 parts of iron powder, 9 parts of stainless steel powder, 15 parts of kaolin, 6 parts of molybdenum disulfide, 6 parts of sepiolite fiber, 9 parts of boron carbide ceramic powder, 15 parts of dimethyl trimethylsilyl methylphosphonate, 14 parts of basic nickel carbonate, 6 parts of atomized tin powder, 14 parts of graphite powder, 15 parts of nano aluminum oxide, 14 parts of tungsten disulfide, 6 parts of zirconium silicate, 8 parts of tungsten silicide, 3 parts of bayberry wax, 8 parts of tin trioxide, 6 parts of hafnium boride, 4 parts of aluminate vinegar coupling agent and 3 parts of vanadium carbide;

step 2, putting the molybdenum disulfide, the stainless steel powder, the tungsten disulfide, the atomized tin powder, the electrolytic nickel, the copper powder, the nano aluminum oxide, the hafnium boride, the tungsten silicide and the vanadium carbide in the formula in the step 1 into a vacuum induction electromagnetic furnace, and then heating to completely melt the materials; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 5MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then adding the powder and other raw materials into a high-speed mixer with a charging barrel at 100 ℃, and stirring at a high speed of 3000r/min for 20-30 min;

step 3, putting the fully mixed powder into a mould for pressing, wherein the mould pressing temperature is 450 ℃, the pressure is 150MPa, and the heat preservation and pressure maintaining are carried out for 20 min;

step 4, increasing the pressure to 400MPa, and keeping the temperature and the pressure for 20 min;

and 5, sintering and heat treating the pressed and formed compact in a nitrogen and hydrogen reducing atmosphere, wherein the sintering and heat treating comprises the following steps: pre-sintering, namely gradually sintering and heating the pressed blank for 1.5 hours, and heating to 500 ℃; main sintering, heating to 980 deg.C, and maintaining the temperature for 1.5 hr; cooling, and then gradually cooling to normal temperature after 1.5 hours;

and 6, cleaning the sintered pressing piece, and then carrying out oil immersion treatment.