Search International and National Patent Collections

1. (WO2018036348) THIN THERMOFORMED STEEL DIRECTLY ROLLED USING THIN SLABS AND HAVING TENSILE STRENGTH OF ≥1500 MPA, AND METHOD FOR PRODUCING SAME

Pub. No.:    WO/2018/036348    International Application No.:    PCT/CN2017/095494
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Wed Aug 02 01:59:59 CEST 2017
IPC: C22C 38/32
C22C 38/28
C22C 38/26
C22C 38/24
C22C 38/18
Applicants: WUHAN IRON AND STEEL COMPANY LIMITED
武汉钢铁有限公司
Inventors: MAO, Xinping
毛新平
HU, Kuanhui
胡宽辉
WANG, Shuize
汪水泽
PAN, Libo
潘利波
GE, Rui
葛锐
LI, Lijun
李立军
PENG, Tao
彭涛
DU, Xiaofeng
杜晓峰
ZHOU, Wenqiang
周文强
Title: THIN THERMOFORMED STEEL DIRECTLY ROLLED USING THIN SLABS AND HAVING TENSILE STRENGTH OF ≥1500 MPA, AND METHOD FOR PRODUCING SAME
Abstract:
Provided is a thin thermoformed steel directly rolled using thin slabs and having tensile strength of ≥1500 MPa, having a component wt% of C: 0.21-0.25%, Si: 0.26-0.30%, Mn: 1.0-1.3%, P≤0.01%, S≤0.005%, Als: 0.015-0.060%, Cr: 0.25-0.30%, Ti: 0.026-0.030% or Nb: 0.026-0.030% or V: 0.026-0.030%, or a mixture of two or more of the above in any proportion; B: 0.003-0.004%, and N≤0.005%. Production steps: hot metal desulfurisation; electric-furnace or converter smelting and refining; continuous casting; descaling, then entering a soaking pit; soaking; heating; high-pressure water descaling, then entering a rolling mill; rolling; cooling; coiling; austenitizing; die stamping; quenching. The process of the method is short, the quality of the surface of the product is good, and thickness and precision are high, thus satisfying the quality requirements of cold-rolled products; complicated deformation is successfully accomplished and there is no rebound after deformation, and the precision of sizing components is high.