LOW TEMPERATURE-RESISTANT HOT-ROLLED H-TYPE STEEL FOR 355MPA MARINE ENGINEERING AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2022/022040

A1

A low-temperature-resistant hot-rolled H-type steel for marine engineering and a preparation method therefor. Chemical components of the H-type steel include, in percentage by weight, 0.040-0.070 of C, 0.015-0.30 of Si, 1.20-1.50 of Mn, less than or equal to 0.015 of P, less than or equal to 0.010 of S, 0.02-0.040 of Nb, 0.008-0.025 of Ti, 0.10-0.50 of Ni, 0.015-0.050 of Al, 0.0001-0.0008 of B, less than or equal to 0.04 of As+Sn+Cu+Zn, less than or equal to 0.0040 of N, less than or equal to 0.0015 of T.[O], and the balance of Fe and inevitable impurities. Using composite microalloying to carry out controlled-rolling and controlled-cooling production can achieve batch preparation of products of different shapes and different specifications, and is suitable for production requirements of multi-specification small-batch steels for marine engineering projects in a low temperature environment.

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ZHAO PEILIN (CN)
WANG ZHONGXUE (CN)
HAN WENXI (CN)
LIU CHAO (CN)
WANG JIANJUN (CN)
SHANG GUOMING (CN)
WU HUILIANG (CN)
NING WEI (CN)
MA QIANG (CN)
ZHENG LI (CN)
WU WENJIAN (CN)

PCT/CN2021/096629

February 03, 2022

May 28, 2021

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SHANDONG IRON & STEEL CO LTD (CN)

C22C38/02; C21D8/00; C22C38/04; C22C38/06; C22C38/08

CN111945064A	2020-11-17
CN103540844A	2014-01-29
CN101812632A	2010-08-25
CN102277529A	2011-12-14
CN103834861A	2014-06-04
CN104073731A	2014-10-01
JP2017115200A	2017-06-29
JPS5448629A	1979-04-17
CN102021475A	2011-04-20
CN103667910A	2014-03-26
CN101255527A	2008-09-03
CN105018861A	2015-11-04

See also references of EP 4089199A4

FASTA INTELLECTUAL PROPERTY LIMITED (CN)

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