Title:
690 MPA-GRADED EASY-TO-WELD CORROSION-RESISTING HIGH-STRENGTH STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/208178
Kind Code:
A1
Abstract:
690 MPa-graded easy-to-weld corrosion-resisting high-strength steel and a manufacturing method therefor. Components (wt%) of the steel are as follows: C: 0.13%-0.23%; Si: 0.10%-0.60%; Mn: 0.80%-1.90%: P: <0.018%; S: <0.008%; Cr: 0-0.50%; Ni: 0-0.60%; Mo: 0-0.45%; Cu: 0-0.40%; Nb: 0-0.060%; V: 0-0.15%; Ti: 0-0.120%; B: 0-0.0035%; and Al: 0.010%-0.050%. An even and fine troostitic structure is obtained during heat treatment in alloy component design, good mechanical properties and fatigue properties are obtained, welding performance and corrosion resistance are more excellent, and the steel adapts to production and manufacturing in engineering machinery, mining machinery, harbor machinery and other industries.
Inventors:
FENG YONG (CN)
WU JUNPING (CN)
QIAO MINGLIANG (CN)
YAN QIANGJUN (CN)
ZHANG QINGHUI (CN)
LIU TONG (CN)
ZHENG JIANPING (CN)
LIU JIHONG (CN)
WU JUNPING (CN)
QIAO MINGLIANG (CN)
YAN QIANGJUN (CN)
ZHANG QINGHUI (CN)
LIU TONG (CN)
ZHENG JIANPING (CN)
LIU JIHONG (CN)
Application Number:
PCT/CN2020/090751
Publication Date:
October 21, 2021
Filing Date:
May 18, 2020
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/14; C21D1/18; C21D11/00; C22C38/28
Foreign References:
| CN101451218A | 2009-06-10 | |||
| CN104831185A | 2015-08-12 | |||
| CN104962828A | 2015-10-07 | |||
| KR20130002165A | 2013-01-07 | |||
| JPS5210817A | 1977-01-27 | |||
| KR20130002172A | 2013-01-07 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL CENERAL PARTNERSHIP) (CN)
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