High-hardness steel ball and preparation method thereof

A high-hardness, steel ball technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of ball bearing restrictions, heavy loads, and unbearable problems

Inactive Publication Date: 2017-11-03
WUHU YUHENG SPECIAL STEEL BALL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-hardness steel ball and its preparation method, which solves the problem that the ball bearing cannot bear a large heavy load due to the limitation of the hardness of the inner steel ball

Method used

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preparation example Construction

[0015] The present invention provides a kind of preparation method of high hardness steel ball, and described preparation method comprises:

[0016] (1) The raw materials are smelted in a vacuum environment, and the alloy liquid is obtained after removing slag and deoxidizing;

[0017] (2) Cool the alloy liquid to 1400-1420°C and add it into a mold for molding to obtain a steel ball green body;

[0018] (3) performing the first annealing treatment on the steel ball green body to obtain the steel ball green body M, wherein the first annealing temperature is 540-560°C, and the holding time is 1-2h;

[0019] (4) performing a second annealing treatment on the steel ball green body M to obtain a steel ball green body N, wherein the second annealing temperature is 340-380° C., and the holding time is 30-50 minutes;

[0020] (5) Cooling the steel ball body N to room temperature to obtain a high-hardness steel ball.

[0021] In a preferred embodiment of the present invention, in ord...

Embodiment 1

[0031] Melt the raw materials in a vacuum environment, remove slag and deoxidize (the raw materials of the deoxidizer in the deoxidation process include at least: 100g bauxite, 20g iron powder, 5g aluminum powder, 2g silicon carbide and 1g calcium carbide) to obtain alloy liquid; Cool the alloy liquid to 1400°C and add it into a mold for molding to obtain a steel ball green body; perform the first annealing treatment on the steel ball green body to obtain a steel ball green body M, wherein the first annealing temperature is 540°C, the holding time is 1h; the steel ball body M is subjected to a second annealing treatment to obtain a steel ball body N, wherein the second annealing temperature is 340°C, and the holding time is 30min; the steel The green ball body N is cooled to room temperature, and the steel ball blank is treated with a grinding liquid (the raw materials of the grinding liquid include at least 100g of bentonite, 5g of carbon black, 2g of silicon dioxide, 5g of so...

Embodiment 2

[0033] Melt the raw materials in a vacuum environment, remove slag and deoxidize (the raw materials of the deoxidizer in the deoxidation process include at least: 100g bauxite, 40g iron powder, 12g aluminum powder, 10g silicon carbide and 5g calcium carbide) to obtain alloy liquid; Cool the alloy liquid to 1420°C and add it to a mold for molding to obtain a steel ball green body; perform the first annealing treatment on the steel ball green body to obtain a steel ball green body M, wherein the first annealing temperature is 560°C, the holding time is 2h; the steel ball green body M is subjected to the second annealing treatment to obtain the steel ball green body N, wherein, the second annealing temperature is 380°C, and the holding time is 50min; The green ball body N is cooled to room temperature, and the steel ball blank is treated with a grinding liquid (the raw materials of the grinding liquid include at least 100g of bentonite, 12g of carbon black, 10g of silicon dioxide,...

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PUM

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Abstract

The invention discloses a high-hardness steel ball and a preparation method thereof. The preparation method comprises: melting raw materials in a vacuum environment, removing slag and deoxidizing to obtain alloy liquid; cooling the alloy liquid to 1400-1420°C After adding into a mold for molding, a steel ball green body is obtained; the steel ball green body is subjected to the first annealing treatment to obtain a steel ball green body M, and the steel ball green body M is subjected to a second annealing treatment to obtain a steel ball green body The ball blank N is obtained by cooling the steel ball blank N to room temperature to obtain a high-hardness steel ball; the problem that the ball bearing cannot bear a large heavy load due to the limitation of the hardness of the inner steel ball is solved.

Description

technical field [0001] The invention relates to the field of steel ball preparation, in particular to a high-hardness steel ball and a preparation method thereof. Background technique [0002] The ball bearing is a kind of rolling bearing. The spherical alloy steel ball is installed in the middle of the inner steel ring and the outer steel ring to reduce the friction force in the process of power transmission and improve the transmission efficiency of mechanical power by rolling. The ball bearing is due to its internal steel The hardness of the ball is limited, so it cannot bear large heavy loads. Contents of the invention [0003] The object of the present invention is to provide a high-hardness steel ball and its preparation method, which solves the problem that the ball bearing cannot bear a large heavy load due to the limitation of the hardness of the inner steel ball. [0004] In order to achieve the above object, the invention provides a kind of preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/36C21D1/26C22C38/02C22C38/16C22C38/14C22C38/12C21C7/06C09G1/02
CPCC21D9/36C09G1/02C21C7/06C21D1/26C22C38/002C22C38/02C22C38/12C22C38/14C22C38/16
Inventor 潘小生胡金根施扬真
Owner WUHU YUHENG SPECIAL STEEL BALL
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