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W-containing high-hardness corrosion-resistant high-carbon bearing steel and production process thereof

A high-carbon bearing and production process technology, applied in the direction of manufacturing converters, etc., can solve the problems of cumbersome production process and achieve the effect of improving the level of cleanliness, high strength and plasticity

Pending Publication Date: 2021-12-21
JINGYE STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technologies have certain advantages, they also have certain shortcomings. For example, the production process is relatively cumbersome, and higher requirements are put forward for the whole process of iron and steel technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The high-carbon bearing steel is characterized in that the composition in wt% is composed of: C: 0.95-1.15%, Si: 0.50-0.55%, Mn: 0.55-0.65%, P≤0.01%, S≤0.005%, Cr : 2-2.2%, Mo: 0.1-0.20%, Nb: 0.01-0.05%, Ti: 0.01-0.05%, W0.3-0.5%, rare earth yttrium 0.001-0.005%, Al: 0.01-0.05%, the balance It is Fe and unavoidable impurities, and the impurity content is less than 0.1%.

[0039] The production process of the W-containing high-hardness and corrosion-resistant high-carbon bearing steel is characterized in that it includes converter smelting, LF refining, VD refining and continuous casting processes,

[0040] (1) Converter smelting: use top-bottom combined blowing converter, end point carbon content is 0.65% ~ 0.85%, [P] ≤ 0.015%, tapping temperature is controlled at 1630°C ~ 1650°C, and aluminum is added to the molten steel when tapping grain or calcium-iron alloy, the oxygen content in the steel should be controlled to be ≤30ppm;

[0041] (2) LF refining: Measure the t...

Embodiment 2

[0047] The high-carbon bearing steel is characterized in that the composition in wt% is composed of: C: 0.95%, Si: 0.50%, Mn: 0.55%, P≤0.01%, S≤0.005%, Cr: 2.2%, Mo: 0.18%, Nb: 0.05%, Ti: 0.01%, W0.45%, rare earth yttrium 0.003%, Al: 0.01-0.05%, the balance is Fe and unavoidable impurities, and the impurity content is less than 0.1%.

[0048] The production process of the W-containing high-hardness and corrosion-resistant high-carbon bearing steel is characterized in that it includes converter smelting, LF refining, VD refining and continuous casting processes,

[0049] (1) Converter smelting: use top-bottom combined blowing converter, end point carbon content is 0.65% ~ 0.85%, [P] ≤ 0.015%, tapping temperature is controlled at 1630°C ~ 1650°C, and aluminum is added to the molten steel when tapping grain or calcium-iron alloy, the oxygen content in the steel should be controlled to be ≤30ppm;

[0050] (2) LF refining: Measure the temperature after LF enters the station. If th...

Embodiment 3

[0056] The high-carbon bearing steel is characterized in that the composition in wt% is composed of the following: C: 1.0%, Si: 0.53%, Mn: 0.6%, P≤0.01%, S≤0.005%, Cr: 2.1%, Mo: 0.15%, Nb: 0.03%, Ti: 0.04%, W0.4%, rare earth yttrium 0.003%, Al: 0.01-0.05%, the balance is Fe and unavoidable impurities, and the impurity content is less than 0.1%.

[0057] The production process of the W-containing high-hardness and corrosion-resistant high-carbon bearing steel is characterized in that it includes converter smelting, LF refining, VD refining and continuous casting processes,

[0058] (1) Converter smelting: use top-bottom combined blowing converter, end point carbon content is 0.65% ~ 0.85%, [P] ≤ 0.015%, tapping temperature is controlled at 1630°C ~ 1650°C, and aluminum is added to the molten steel when tapping grain or calcium-iron alloy, the oxygen content in the steel should be controlled to be ≤30ppm;

[0059] (2) LF refining: Measure the temperature after LF enters the stati...

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Abstract

The invention discloses W-containing high-hardness corrosion-resistant high-carbon bearing steel and a production process thereof. According to the scheme of the W-containing high-hardness corrosion-resistant high-carbon bearing steel and the production process thereof, the alloy components and the production process are adjusted, so that the bearing steel which is simple in production process, high in hardness, high in wear resistance, resistant to corrosion and long in service life is obtained. The W-containing high-hardness corrosion-resistant high-carbon bearing steel is characterized by comprising the following components in percentage by weight: 0.95-1.15% of C, 0.50-0.55% of Si, 0.55-0.65% of Mn, less than or equal to 0.01% of P, less than or equal to 0.005% of S and 0.3-0.5% of W.

Description

technical field [0001] The invention belongs to the technical field of alloy steel production, and in particular relates to a high-hardness corrosion-resistant high-carbon bearing steel containing W and a production process thereof. Background technique [0002] Bearings are very important parts in mechanical equipment. Common bearing materials are mainly high-carbon chromium bearing steel and carburized bearing steel. The carbon content of high-carbon chromium bearing steel is generally 0.95-1.15%, and its structure is: tempered martensite + carbide + a small amount of retained austenite. Ideally, wear failures will occur. The carbon content of carburized bearing steel is generally about 0.2%, and high hardness is obtained by forming a high-carbon martensitic hard layer on the surface. [0003] Because bearings are subject to high contact stress, multiple cyclic contact fatigue stress and sliding wear working environment, it is necessary for the bearing to have high resis...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/22C22C38/26C22C38/28C22C38/06C21C5/35C22C33/04C21D1/32C21D1/18
CPCC22C38/02C22C38/04C22C38/12C22C38/22C22C38/26C22C38/28C22C38/005C22C38/06C21C5/35C22C33/04C21D1/32C21D1/18C21D2211/008C21D2211/004
Inventor 杨海西刘锦强曹晓运樊利智孙志丽
Owner JINGYE STEEL CO LTD