A kind of bearing and its preparation process

Abstract

The invention discloses a bearing and a preparation technology thereof, and belongs to the technical field of metal materials. The bearing comprises 0.05%-0.07% of Cd, 0.5%-1.5% of Mn, 0.4%-0.8% of C,0.08%-0.12% of Tl, 0.01%-0.05% of Cu, 0.03%-0.07% of Co and the balance Fe and impurities. The Cd element in raw materials can react with Cu in the materials to form hard copper alloy phases dispersed in steel, so that the tensile strength and abrasion resistance of alloy steel are improved obviously. Tl is very important for the alloy steel, not only the alloy strength can be improved, but alsothe alloy hardness and the corrosion resistance of the alloy can be improved, and the Tl is essential for the effect of prolonging the service life of a product. Meanwhile, with the method that the bearing body is combined with polymer layers outside the bearing body, the product has extremely high resistance in complex and variable environment.

Description

technical field

[0001] The invention relates to a bearing and a preparation process thereof, belonging to the field of metal materials. Background technique

[0002] Bearing is an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Bearings are indispensable for the operation of machinery, which requires the bearing itself to have good strength and wear resistance. Usually the bearing is made of alloy steel.

[0003] Alloy steel is an alloy system based on iron, adding a certain amount of carbon, molybdenum, manganese and other elements, and controlling the content of added elements. Alloy steel has high strength, high hardness and certain ductility, and is suitable for structural materials. Therefore, it is widely used in defense industry and civil industry, especially in automobile, motorcycle, firearms and other industries...

Examples

Embodiment 1

[0033] Ingredients: Weigh raw materials according to the composition and mass percentage of the above alloy steel, including Cd: 0.06%, Mn: 1%, C: 0.6%, Tl: 0.1%, Cu: 0.03%, Co: 0.05%, and the balance is Fe and impurities, wherein impurities include P<0.04%, S<0.04%, N<0.04%, O<0.03%. The raw materials are melted to form alloy liquid and poured into the mold to form bearing semi-finished products.

[0034] Heat treatment: Temper the bearing semi-finished product first, heat it to 550°C, keep it warm for 10 minutes, cool it down to room temperature naturally, and then perform annealing treatment, heat the semi-finished product to 350°C, keep it warm for 5 minutes, cool it with the furnace, and then perform the second isothermal tempering treatment , keep warm for 3 minutes, cool to room temperature with external air, and finally anneal for the second time at a lower temperature, heat to 250°C, keep warm for 3 minutes and then cool naturally to room temperature.

[0035] Blendi...

Embodiment 2

[0038] Ingredients: Weigh raw materials according to the composition and mass percentage of the above alloy steel, including Cd: 0.05%, Mn: 0.5%, C: 0.4%, Tl: 0.08%, Cu: 0.01%, Co: 0.03%, and the balance is Fe and impurities, wherein impurities include P<0.04%, S<0.04%, N<0.04%, O<0.03%. The raw materials are melted to form alloy liquid and poured into the mold to form bearing semi-finished products.

[0039] Heat treatment: Temper the bearing semi-finished product first, heat it to 400°C, keep it warm for 5 minutes, cool it down to room temperature naturally, then perform annealing treatment, heat the semi-finished product to 300°C, keep it warm for 1 minute, cool it with the furnace, and then perform the second isothermal tempering treatment , keep warm for 1min, cool to room temperature with external air, and finally anneal for the second time at a lower temperature, heat to 200°C, keep warm for 1min and then cool naturally to room temperature.

[0040] Blending of external ...

Embodiment 3

[0043] Ingredients: Weigh raw materials according to the composition and mass percentage of the above alloy steel, including Cd: 0.07%, Mn: 1.5%, C: 0.8%, Tl: 0.12%, Cu: 0.05%, Co: 0.07%, and the balance is Fe and impurities, wherein impurities include P<0.04%, S<0.04%, N<0.04%, O<0.03%. The raw materials are melted to form alloy liquid and poured into the mold to form bearing semi-finished products.

[0044] Heat treatment: Temper the bearing semi-finished product first, heat it to 700°C, keep it warm for 15 minutes, cool it down to room temperature naturally, then perform annealing treatment, heat the semi-finished product to 400°C, keep it warm for 10 minutes, cool it with the furnace, and then perform the second isothermal tempering treatment , heat preservation for 5 minutes, external air cooling to room temperature, and finally a second annealing at a lower temperature, heating to 300 ° C, heat preservation for 5 minutes, and then naturally cooling to room temperature. ...

technical field

[0001] The invention relates to a bearing and a preparation process thereof, belonging to the field of metal materials. Background technique

[0002] Bearing is an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Bearings are indispensable for the operation of machinery, which requires the bearing itself to have good strength and wear resistance. Usually the bearing is made of alloy steel.

[0003] Alloy steel is an alloy system based on iron, adding a certain amount of carbon, molybdenum, manganese and other elements, and controlling the content of added elements. Alloy steel has high strength, high hardness and certain ductility, and is suitable for structural materials. Therefore, it is widely used in defense industry and civil industry, especially in automobile, motorcycle, firearms and other industries...

Examples

Embodiment 1

[0033] Ingredients: Weigh raw materials according to the composition and mass percentage of the above alloy steel, including Cd: 0.06%, Mn: 1%, C: 0.6%, Tl: 0.1%, Cu: 0.03%, Co: 0.05%, and the balance is Fe and impurities, wherein impurities include P<0.04%, S<0.04%, N<0.04%, O<0.03%. The raw materials are melted to form alloy liquid and poured into the mold to form bearing semi-finished products.

[0034] Heat treatment: Temper the bearing semi-finished product first, heat it to 550°C, keep it warm for 10 minutes, cool it down to room temperature naturally, and then perform annealing treatment, heat the semi-finished product to 350°C, keep it warm for 5 minutes, cool it with the furnace, and then perform the second isothermal tempering treatment , keep warm for 3 minutes, cool to room temperature with external air, and finally anneal for the second time at a lower temperature, heat to 250°C, keep warm for 3 minutes and then cool naturally to room temperature.

[0035] Blendi...

Embodiment 2

[0038] Ingredients: Weigh raw materials according to the composition and mass percentage of the above alloy steel, including Cd: 0.05%, Mn: 0.5%, C: 0.4%, Tl: 0.08%, Cu: 0.01%, Co: 0.03%, and the balance is Fe and impurities, wherein impurities include P<0.04%, S<0.04%, N<0.04%, O<0.03%. The raw materials are melted to form alloy liquid and poured into the mold to form bearing semi-finished products.

[0039] Heat treatment: Temper the bearing semi-finished product first, heat it to 400°C, keep it warm for 5 minutes, cool it down to room temperature naturally, then perform annealing treatment, heat the semi-finished product to 300°C, keep it warm for 1 minute, cool it with the furnace, and then perform the second isothermal tempering treatment , keep warm for 1min, cool to room temperature with external air, and finally anneal for the second time at a lower temperature, heat to 200°C, keep warm for 1min and then cool naturally to room temperature.

[0040] Blending of external ...

Embodiment 3

[0043] Ingredients: Weigh raw materials according to the composition and mass percentage of the above alloy steel, including Cd: 0.07%, Mn: 1.5%, C: 0.8%, Tl: 0.12%, Cu: 0.05%, Co: 0.07%, and the balance is Fe and impurities, wherein impurities include P<0.04%, S<0.04%, N<0.04%, O<0.03%. The raw materials are melted to form alloy liquid and poured into the mold to form bearing semi-finished products.

[0044] Heat treatment: Temper the bearing semi-finished product first, heat it to 700°C, keep it warm for 15 minutes, cool it down to room temperature naturally, then perform annealing treatment, heat the semi-finished product to 400°C, keep it warm for 10 minutes, cool it with the furnace, and then perform the second isothermal tempering treatment , heat preservation for 5 minutes, external air cooling to room temperature, and finally a second annealing at a lower temperature, heating to 300 ° C, heat preservation for 5 minutes, and then naturally cooling to room temperature. ...

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