NON-QUENCHED AND TEMPERED STEEL WEATHER-RESISTANT HIGH-STRENGTH BOLT, AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2022/199113

A1

Disclosed in the present invention is a non-quenched and tempered steel weather-resistant high-strength bolt, comprising the following chemical components in percentage by mass: 0.17-0.23% of C; Si≤0.30; 1.25-1.60 of Mn; P≤0.02; S≤0.015%; 0.4-0.6% of Cr, Ni≤0.3%; V≤0.08%; Nb≤0.05%; Ti≤0.04; 0.37-0.41 of Cu; 0.01-0.035 of Al; 0.006-0.012 of N; and O≤0.0015, with the balance being Fe and inevitable impurities. The M6 bolt manufactured in the present invention has the tensile strength of greater than or equal to 810 MPa, the elongation after fracture of greater than or equal to 10%, and the reduction of area of greater than or equal to 55%, and has the technical effects of high tensile strength, good plastic toughness and excellent atmospheric corrosion resistance.

HUANG YIXIN (CN)
QIAO MINGLIANG (CN)
CHEN XINGHUA (CN)
ZHAO BAIJIE (CN)
LIU LEI (CN)
ZHOU LEI (CN)
LU HENGCHANG (CN)
ZHAO XIUMING (CN)
DENG WEI (CN)
LIU WENXUE (CN)
QIAN PENG (CN)
ZHANG BO (CN)
WANG YANG (CN)
YUAN FENG (CN)
WANG XIAOQIN (CN)
DONG HAN (CN)
BAO YUKUN (CN)
HU CHUNDONG (CN)
WU MENG (CN)

PCT/CN2021/135205

September 29, 2022

December 03, 2021

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NANJING IRON & STEEL CO LTD (CN)

C22C38/02; B21H3/04; B21K1/44; C21D1/00; C21D6/00; C21D8/00; C21D9/00; C22C38/04; C22C38/06; C22C38/42; C22C38/46; C22C38/48; C22C38/50; C22C38/58

CN113186450A	2021-07-30
CN111206190A	2020-05-29
CN104328261A	2015-02-04
CN110438402A	2019-11-12
JP2000073138A	2000-03-07

NANJING SUGAO PATENT AND TRADEMARK FIRM ( ORDINARY PARTNERSHIP ) (CN)

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