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Steel for carbon hub bearing of microalloying car and production method thereof

A technology of micro-alloying and hub bearings, applied in bearings, hubs, manufacturing tools, etc., can solve problems affecting product performance, uneven bearing structure, and reduced bearing service life, so as to improve quality and secondary dendrite arm spacing Improve and reduce the effect of central carbon segregation

Inactive Publication Date: 2016-05-11
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] High-end hub bearing steel is very sensitive to structure uniformity and composition segregation, especially the segregation of central carbon, which will lead to uneven bearing structure, seriously affect the performance of the product, and reduce the service life of the bearing

Method used

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  • Steel for carbon hub bearing of microalloying car and production method thereof
  • Steel for carbon hub bearing of microalloying car and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Below in conjunction with embodiment the present invention is described in further detail.

[0045] The chemical composition (wt%) of carbon hub bearing steel in each embodiment of the present invention and (as a comparison) G55 and foreign C56E2 hub bearing steel used in the market is shown in Table 2 and Table 3,

[0046] Table 2

[0047]

Example

C

Si

mn

P

S

Cr

Mo

Ni

Al

this invention

1

0.56

0.30

0.58

0.013

0.004

0.35

0.01

0.03

0.015

this invention

2

0.57

0.28

0.59

0.011

0.004

0.35

0.02

0.04

0.017

this invention

3

0.57

0.28

0.58

0.013

0.004

0.36

0.01

0.03

0.018

Domestic G55

4

0.55

0.27

0.80

0.012

0.001

0.08

0.01

0.03

0.022

Foreign C56E2

5

0.56

0.28

0.79

0.010

0.002

0.10

0.01

0.03

0.01...

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Abstract

The invention relates to steel for a carbon hub bearing of a microalloying car. The steel comprises the following chemical components: 0.45-0.70% of C, 0.10-0.50% of Si, 0.30-0.70% of Mn, 0.20-0.60% of Cr, P not more than 0.025%, 0.003-0.030% of S, Mo not more than 0.1%, Ni not more than 0.2%, Al not more than 0.04%, Cu not more than 0.3%, Ca not more than 0.001%, Ti not more than 0.003%, O not more than 0.001%, As not more than 0.04%, Sn not more than 0.03%, Sb not more than 0.005%, Pb not more than 0.002%, and the balance of Fe and inevitable impurities. A production method comprises an electric furnace or a converter-refining out of the furnace-VD or RH vacuum degassing-continuous casting-continuous rolling-sawing-cooling in heap-finishing-surface and internal flaw detection-packing. The steel for the hub bearing improves the mechanical performance, the element segregation and the structure uniformity, and belongs to a brand new hub bearing steel type.

Description

technical field [0001] The invention belongs to the technical field of special steel smelting, and in particular relates to steel for carbon hub bearings of bridge vehicles and a corresponding manufacturing method. Background technique [0002] The main function of the hub bearing is to bear weight and provide precise guidance for the rotation of the hub. It bears both axial load and radial load, and is a very important component. Therefore, the requirements for the performance of steel for wheel hub bearings, the raw material for making wheel hub bearings, are getting higher and higher, especially for the wear resistance, hardenability, purity and uniformity of the material. At present, the domestic and foreign carbon hub bearing steel G55, C56E2 and other products cannot fully meet the needs of high-end automobile users for hub bearing steel due to the limitation of product quality. Therefore, the development of hub bearing steel with better product performance is imminent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/12C22C38/08C22C38/16C21C7/10C21C7/06C21C5/54B22D11/18B22D11/22
CPCB22D11/18B22D11/225C21C5/54C21C7/06C21C7/10C22C38/02C22C38/04C22C38/08C22C38/12C22C38/16C22C38/18C22C38/28B22D11/001B22D11/115B22D11/1206B22D11/1213B22D11/122C22C38/20C22C38/22C22C38/40C21D6/004C21D6/005C21D6/008C21D8/065C21D9/40C22C38/002C22C38/008C22C38/06C22C38/42C22C38/44C22C38/50C22C38/60B21B1/22B21B2001/225B60B27/02F16C19/186F16C2204/72
Inventor 陈敏李峰尹青翟蛟龙耿克张剑锋黄镇鲍俭阮小江
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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