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

WIPO Patent Application WO/2018/036348

A1

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.

MAO XINPING (CN)
HU KUANHUI (CN)
WANG SHUIZE (CN)
PAN LIBO (CN)
GE RUI (CN)
LI LIJUN (CN)
PENG TAO (CN)
DU XIAOFENG (CN)
ZHOU WENQIANG (CN)

PCT/CN2017/095494

March 01, 2018

August 01, 2017

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WUHAN IRON & STEEL CO LTD (CN)

C22C38/32; C22C38/18; C22C38/24; C22C38/26; C22C38/28

CN106086685A	2016-11-09
CN103361560A	2013-10-23
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CN104160050A	2014-11-19
CN103320702A	2013-09-25
EP2071045B1	2012-06-27
JP2007031735A	2007-02-08
US5372654A	1994-12-13

HUBEI WUHAN YONGJIA PATENT AGENCY CO., LTD (CN)

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