ULTRAHIGH-STRENGTH ALLOY STEEL, GRADE 16.8 THREADED FASTENER AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2024/016484

A1

The present invention belongs to the field of high-strength alloy fastener manufacturing. Provided are an ultrahigh-strength alloy steel, a grade 16.8 threaded fastener and a manufacturing method therefor. The ultrahigh-strength alloy steel provided by the present invention comprises the following components in percentage by mass: 0.35-0.60% of C, 0.035-0.15% of Si, 0.10-0.90% of Mn, less than 0.020% of P, less than 0.0010% of S, 1.50-2.50% of Cr, 2.00-3.00% of Mo, 0.30-0.80% of V, 0.25-1.00% of Ni and 0.001-0.200% of Nb, with the balance being Fe. In the present invention, synergistic effects can be achieved by controlling the amount of each element, so that threaded fasteners prepared from the ultrahigh-strength alloy steel have excellent mechanical properties, and the cost is reduced.

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WO/2022/018563	COLD ROLLED AND ANNEALED STEEL SHEET AND METHOD OF MANUFACTURING THE SAME
WO/2021/204811	BIORESORBABLE FE-MN-SI-X ALLOYS FOR MEDICAL IMPLANTS

LU HENGCHANG (CN)
DONG HAN (CN)
CHEN QINFEI (CN)
HU JIE (CN)
HU CHUNDONG (CN)
LAI JIANMING (CN)

PCT/CN2022/124015

January 25, 2024

October 09, 2022

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QIFENG PREC INDUSTRY SCI TECH CORP (CN)
UNIV SHANGHAI (CN)
ZHEJIANG INSTITUTE OF ADVANCED MAT SHU (CN)

C22C38/02; B23P15/00; C21D1/18; C21D1/28; C22C38/04; C22C38/44; C22C38/46; C22C38/48; F16B33/02; F16B35/00

CN115216695A	2022-10-21
CN1900344A	2007-01-24
CN1900343A	2007-01-24
JP2007031736A	2007-02-08
CN115747678A	2023-03-07
CN110819901A	2020-02-21

BEIJING GAOWO LAW FIRM (CN)

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