Title:
STEEL FOR BALL-CAGE TYPE UNIVERSAL JOINT RETAINER AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/160720
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of special steel smelting, and relates to a steel for a ball-cage type universal joint retainer and a production method therefor. The steel comprises the following chemical ingredients by wt%: 0.10 - 0.25% of C, 0.20 - 0.40% of Si, 0.40 - 0.65% of Mn, 0.40 - 0.70% of Cr, 0.0003 - 0.0025% of B, 0.010 - 0.035% of Ti, 0.30 - 0.45% of Mo, 0.0050 - 0.0100% of N, ≤ 0.015% of S, ≤ 0.025% of P, ≤ 0.25% of Ni, ≤ 0.30% of Cu, 0.015 - 0.035% of Al, ≤ 0.0010% of O,≤ 0.04% of As,≤ 0.03% of Sn, ≤ 0.005% of Sb, ≤ 0.002% of Pb, and the balance being Fe and unavoidable impurities. The microstructure of the steel is bainite, and the grain size of austenite is larger than or equal to 6 grades. The production process comprises primary smelting of molten steel, refining of molten steel, vacuum degassing of molten steel, continuous casting, hot rolling and finishing. In the present application, the chemical ingredients are optimized, and the alloy costs are reduced. Furthermore, a hardenability similar to that of 20CrMnTi is achieved, the strength and toughness of the steel manufactured by combining the chemical ingredients with the production method are better than the strength and toughness of 20CrMnTi, and the comprehensive performance meets the requirements of the steel for the ball-cage type universal joint retainer.
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Inventors:
CHEN MIN (CN)
BAI YUN (CN)
LUO YUANDONG (CN)
WU XIAOLIN (CN)
YIN QING (CN)
LI WENBIN (CN)
HUA LIUKAI (CN)
LIU YE (CN)
BAI YUN (CN)
LUO YUANDONG (CN)
WU XIAOLIN (CN)
YIN QING (CN)
LI WENBIN (CN)
HUA LIUKAI (CN)
LIU YE (CN)
Application Number:
PCT/CN2021/116576
Publication Date:
August 04, 2022
Filing Date:
September 05, 2021
Export Citation:
Assignee:
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)
International Classes:
C22C38/02; C21C7/00; C21C7/06; C21C7/10; C21D8/00; C22C38/04; C22C38/06; C22C38/20; C22C38/22; C22C38/32; C22C38/42; C22C38/44; C22C38/54
Domestic Patent References:
| WO2020104437A1 | 2020-05-28 |
Foreign References:
| CN110100032A | 2019-08-06 | |||
| CN109182901A | 2019-01-11 | |||
| CN111334796A | 2020-06-26 | |||
| CN110475890A | 2019-11-19 | |||
| CN112267074A | 2021-01-26 | |||
| CN101812635A | 2010-08-25 | |||
| CN1950530A | 2007-04-18 | |||
| CN101481780A | 2009-07-15 | |||
| US10837080B2 | 2020-11-17 | |||
| US20170314107A1 | 2017-11-02 |
Attorney, Agent or Firm:
JIANGYIN QING ZHOU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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