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Preparation method for high-precision bearing steel balls

A bearing steel ball, high-precision technology, applied in the field of steel ball processing, can solve the problems of unstable retained austenite, surface waviness difficult to meet the standard, not stable enough, etc., to achieve high quality, enhanced load capacity, and best quality Effect

Inactive Publication Date: 2018-06-29
TSUBAKI HOOVER TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The material used in the preparation of bearing steel balls is general bearing steel, and due to the difficulty in controlling the heat treatment process and the lack of stability, the retained austenite is unstable and the surface waviness is difficult to meet the standard

Method used

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  • Preparation method for high-precision bearing steel balls

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of high-precision bearing steel ball comprises the following steps in sequence:

[0020] (1) Cold heading: Using bearing steel wire as raw material, it is stamped into steel rough balls. The material of the bearing steel wire is 100CR6.

[0021] (2) Light grinding: use grinding equipment and cast iron discs to carry out light grinding treatment on steel rough balls to obtain smooth ground steel balls. Among them, the processing speed is 20rpm, the processing pressure is 1Mpa, and the grinding medium is cutting fluid.

[0022] (3) Heat treatment: Throw polished steel balls into a drum-type continuous furnace for quenching and tempering heat treatment to obtain preliminary hardened steel balls. Among them, the quenching heating temperature is 840°C, the quenching heating time is 50 minutes, the quenching medium is 40°C fast bright quenching oil, the tempering temperature is 160°C, the tempering holding time is 120 minutes, and nitrogen is used as ...

Embodiment 2

[0032] The preparation method of high-precision bearing steel ball comprises the following steps in sequence:

[0033] (1) Cold heading: Using bearing steel wire as raw material, it is stamped into steel rough balls. The material of the bearing steel wire is 100CR6.

[0034] (2) Light grinding: use grinding equipment and cast iron discs to carry out light grinding treatment on steel rough balls to obtain smooth ground steel balls. Among them, the processing speed is 50rpm, the processing pressure is 3Mpa, and the grinding medium is cutting fluid.

[0035] (3) Heat treatment: Throw polished steel balls into a drum-type continuous furnace for quenching and tempering heat treatment to obtain preliminary hardened steel balls. Among them, the quenching heating temperature is 850°C, the quenching heating time is 60 minutes, the quenching medium is 60°C fast bright quenching oil, the tempering temperature is 180°C, the tempering holding time is 150 minutes, and nitrogen is used as ...

Embodiment 3

[0042] The preparation method of high-precision bearing steel ball comprises the following steps in sequence:

[0043](1) Cold heading: Using bearing steel wire as raw material, it is stamped into steel rough balls. The material of the bearing steel wire is 100CR6.

[0044] (2) Light grinding: use grinding equipment and cast iron discs to carry out light grinding treatment on steel rough balls to obtain smooth ground steel balls. Among them, the processing speed is 100rpm, the processing pressure is 5Mpa, and the grinding medium is cutting fluid.

[0045] (3) Heat treatment: Throw polished steel balls into a drum-type continuous furnace for quenching and tempering heat treatment to obtain preliminary hardened steel balls. Among them, the quenching heating temperature is 860°C, the quenching heating time is 80 minutes, the quenching medium is 100°C fast bright quenching oil, the tempering temperature is 200°C, the tempering holding time is 180 minutes, and nitrogen is used as...

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Abstract

The invention discloses a preparation method for high-precision bearing steel balls. The preparation method sequentially comprises the steps of cold heading, grinding, heat treatment, hard grinding, strengthening, grinding, fine grinding and the like. According to the preparation method, a certain amount of steel balls are put into an iron roller type container, by means of the impact caused by mutual collision of the steel balls due to the weight of the steel balls within a certain rotating speed and time, the surface hardness of the steel ball can be improved, the stress of the positions with certain depth of the surfaces of the steel balls changes due to the phase changes of the internal structures of the steel balls, and therefore, the steel balls can be ensured to have better quality.

Description

technical field [0001] The invention relates to the technical field of steel ball processing, in particular to a method for preparing high-precision bearing steel balls. Background technique [0002] The material used in the preparation of bearing steel balls is general bearing steel, and the heat treatment process is difficult to control and is not stable enough, so the retained austenite is unstable and the surface waviness is difficult to meet the standard. Contents of the invention [0003] The object of the present invention is to provide a method for preparing high-precision bearing steel balls, which has the characteristics of high-quality steel balls prepared. [0004] The technical scheme adopted in the present invention is: the preparation method of high-precision bearing steel ball, comprises the following steps successively: [0005] (1) Cold heading: using bearing steel wire as raw material, stamping it into steel rough ball; [0006] (2) Light grinding: use...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/003
Inventor 黄学斌
Owner TSUBAKI HOOVER TAICANG
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