Production process of high chromium alloy steel ball

A technology of alloy steel ball and production process, which is applied in the field of production process of high chromium alloy steel ball, can solve the problems of discarding, eliminating, reducing the effectiveness of grinding parts, and comparing the consumption of steel balls, etc., and achieves long service life, fine alloy structure and high performance. uniform effect

Inactive Publication Date: 2019-12-10
马鞍山常裕机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, all industries in our country have a serious consumption of steel balls, and the chromium-containing steel balls widely used in various industries are subject to continuous mechanical friction. Abandoned, eliminated

Method used

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  • Production process of high chromium alloy steel ball
  • Production process of high chromium alloy steel ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high chromium alloy steel ball production process, comprising the following steps:

[0023] 1) Raw material smelting: Add the calculated raw materials into the vacuum induction melting furnace, extract the air in the furnace, and make the pressure in the furnace reach 20Pa; then input argon into the furnace at a speed of 1100cm 3 / min, keep the pressure in the furnace constant at 0.2Mpa, control the temperature in the furnace at 1600°C, the heating rate is 50°C / min, and the melting time is 40min. After slag removal and deoxidation, the alloy melt is obtained. Among them, each component in the raw material And the percentage content is as follows: C 1.6%, Cr 26%, Re 0.4%, Mg 0.11%, Ni1.22%, W 0.06%, V 0.08%, Ti 0.18%, Si 0.75%, N 0.04%, Mo 0.011% , Nb 0.41%, P≤0.01%, S≤0.01%, the balance is Fe;

[0024] 2) Add a composite modifier to the alloy melt, and after modification treatment, pour it to obtain a steel ball primary product, wherein the composition and percentage...

Embodiment 2

[0027] A high chromium alloy steel ball production process, comprising the following steps:

[0028] 1) Raw material smelting: Add the calculated raw materials into the vacuum induction melting furnace, extract the air in the furnace, and make the pressure in the furnace reach 20Pa; then input argon into the furnace at a speed of 1100cm 3 / min, keep the pressure in the furnace constant at 0.2Mpa, control the temperature in the furnace at 1590°C, the heating rate is 55°C / min, and the melting time is 45min. After slag removal and deoxidation, the alloy melt is obtained. And the percentage content is as follows: C 0.8%, Cr 28%, Re 0.3%, Mg 0.18%, Ni0.53%, W 0.08%, V 0.04%, Ti 0.22%, Si 0.42%, N 0.06%, Mo 0.005% , Nb 0.52%, P≤0.01%, S≤0.01%, the balance is Fe;

[0029] 2) Adding a compound modifier to the alloy melt, after modification treatment, pouring, to obtain a steel ball primary product, wherein, the composition and percentage of each element in the compound modifier are a...

Embodiment 3

[0032] A high chromium alloy steel ball production process, comprising the following steps:

[0033] 1) Raw material smelting: Add the calculated raw materials into the vacuum induction melting furnace, extract the air in the furnace, and make the pressure in the furnace reach 20Pa; then input argon into the furnace at a speed of 1100cm 3 / min, keep the pressure in the furnace constant at 0.2Mpa, control the temperature in the furnace at 1595°C, the heating rate is 60°C / min, and the melting time is 48min. After slag removal and deoxidation, the alloy melt is obtained. And the percentage content is as follows: C 1.1%, Cr 30%, Re 0.48%, Mg 0.13%, Ni0.78%, W 0.05%, V 0.05%, Ti 0.26%, Si 0.60%, N 0.07%, Mo 0.007% , Nb 0.57%, P≤0.01%, S≤0.01%, the balance is Fe;

[0034] 2) Add a composite modifier to the alloy melt, and after the modification treatment, pour it to obtain a steel ball primary product, wherein the composition and percentage of each element in the composite modifier...

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Abstract

The invention provides a production process of a high chromium alloy steel ball, and relates to the technical field of high chromium alloys. The production process comprises the following steps of rawmaterial smelting: adding the calculated raw materials to a vacuum induction melting furnace, extracting the air in the furnace, and making the pressure in the furnace 20Pa; then inputting argon intothe furnace, the argon inputting speed is 110cm3 / min, so that the pressure in the furnace is constant at 0.2Mpa, controlling the temperature in the furnace at 1590- 1620 DEG C, obtaining an alloy melt after slag removal and deoxidation; adding a composite modifier to the alloy melt, and after the modification treatment and pouring, obtaining an initial steel ball product; air cooling the poured steel ball product to 300- 400 DEG C, heating to 760-820 DEG C, heat preservation for 45-65min, after reducing the temperature to 200-200 DEG C, air cooling to room temperature; after an annealing process is finished, performing quenching and tempering successively to obtain the finished steel ball. The hardness of the steel ball prepared by the invention can reach a level above 62HRC, an impact value of 9J / cm2 and a 100% passing rate, good impact resistance can effectively avoid deformation and cracking of the steel ball; meanwhile, the steel ball also has a higher hardness.

Description

technical field [0001] The invention relates to the technical field of high chromium alloys, in particular to a production process of high chromium alloy steel balls. Background technique [0002] Alloy steel is the main material used to manufacture machinery, and it is also the material and technical basis for the survival and formation of modern machinery manufacturing. It supports the entire national economy and national defense through the manufacture and use of machinery. Alloy steel is interrelated and inseparable from machinery manufacturing, national economy, national defense and scientific and technological modernization. Steel balls are one of the manifestations of the use of alloy steel. Steel balls are used in a wide range of applications, ranging from aerospace, aviation, and navigation, to bicycles, toys and other products. It can also be said that our lives are in contact with steel balls all the time. Chromium-containing steel balls are usually produced by m...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/02C22C38/44C22C38/46C22C38/48C22C38/50C21D1/18C21D1/26C21D6/00C21D9/36C22C30/00
CPCC21D1/18C21D1/26C21D6/004C21D6/008C21D9/36C22C27/00C22C30/00C22C33/04C22C38/001C22C38/002C22C38/005C22C38/02C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 蔡发华
Owner 马鞍山常裕机械设备有限公司
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