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Title:
STEEL FOR BALL CAGE-TYPE UNIVERSAL JOINT CAGE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/161180
Kind Code:
A1
Abstract:
The present invention relates to steel for a ball cage-type universal joint cage and a production method therefor, relating to the technical field of special steel smelting. The chemical composition of the steel in wt% is C: 0.10-0.25%, Si: 0.20-0.40%, Mn: 0.40-0.65%, Cr: 0.40-0.70%, B: 0.0003-0.0025%, Ti: 0.010-0.035%, Mo: 0.30-0.45%, N: 0.0050-0.0100％, S≤0.015％, P≤0.025％, Ni≤0.25％, Cu≤0.30％, Al: 0.015-0.035%, O≤0.0010%, As≤0.04%, Sn≤0.03%, Sb≤0.005%, Pb≤0.002%, and the balance being Fe and unavoidable impurities. The microstructure of the steel is bainite, and the austenite grain size is ≥ level 6. The production process comprises: molten steel primary smelting, molten steel refining, molten steel vacuum degassing, continuous casting, hot rolling, and finishing. The present application optimises the chemical composition and reduces the alloy costs; and reaches a hardenability similar to 20CrMnTi, the strength and toughness of the steel made by said chemical composition combined with the production method being better than 20CrMnTi, and the comprehensive performance meeting the requirements of steel used for a ball cage-type universal joint cage.

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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)
Application Number:
PCT/CN2022/071755
Publication Date:
August 04, 2022
Filing Date:
January 13, 2022
Export Citation:
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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
Foreign References:
CN112981237A2021-06-18
CN108486475A2018-09-04
CN109182901A2019-01-11
CN101646788A2010-02-10
CN108796364A2018-11-13
JP2008214753A2008-09-18
JP2003342672A2003-12-03
Attorney, Agent or Firm:
JIANGYIN QING ZHOU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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