THIN SPECIFICATION NM450 STEEL PLATE AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2022/199075

A1

The present invention relates to a thin specification NM450 steel plate, chemical components of said steel plate, in percentage by weight, being: C: 0.15-0.30, Si: 0.25-0.45, Mn: 0.80-1.20, Cr: 0.20-0.60, Mo: 0.10-0.50, Ni: 0.10-0.50, Al: 0.02-0.08, B: 0.0010-0.0030, P ≤ 0.020, S ≤ 0.010, and the remainder being Fe and unavoidable impurities. The main route of a process is: steel-making → continuous casting → slab compositing or pre-fabricated intermediate slab compositing → rolling → quenching (determining whether to quench after separation according to steel plate thickness) → tempering → finishing → inspecting → warehousing. The thickness of a steel plate made by the present invention is 4-8 mm, the maximum width of a steel plate reaches 3200 mm, and the present invention effectively solves the problems of a hot continuously rolled thin plate having a small width and a portion of wide and thick plate companies lacking coiling and rolling equipment being unable to produce this type of thin steel plate.

HUANG JUN (CN)
LUO YUANDONG (CN)
BAI YUN (CN)
LI JINGTAO (CN)
XU XIAOHONG (CN)
LIN TAO (CN)
WU JIANPENG (CN)
LI CHENXIAO (CN)
HOU MEILING (CN)
ZI XIANPENG (CN)
ZHOU PEIRONG (CN)
XU HAILONG (CN)

PCT/CN2021/131740

September 29, 2022

November 19, 2021

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JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)

C22C38/02; C21D1/18; C21D8/02; C22C33/04; C22C38/04; C22C38/06; C22C38/44; C22C38/54

WO2018036382A1

2018-03-01

CN113249644A	2021-08-13
CN108660374A	2018-10-16
CN104551673A	2015-04-29

JIANGYIN QING ZHOU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)

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