Title:
THIN THERMOFORMING STEEL ROLLED DIRECTLY FROM THIN SLAB AND HAVING TENSILE STRENGTH GREATER THAN OR EQUAL TO 1900 MPA AND PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/036346
Kind Code:
A1
Abstract:
Thin thermoforming steel rolled directly from a thin slab and having tensile strength greater than or equal to 1900 MPa, comprising the following components by weight: C: 0.31-0.40%, Si: 0.36-0.44%, Mn: 1.6-2.0%, P≤0.006% , S≤.004%, Als: 0.015-0.060%, Cr: 0.36-0.49%, Ti: 0.036-0.045% or Nb: 0.036-0.045% or V: 0.036-0.045% or a mixture of any two or more of the above in any proportion, B: 0.004-0.005%, Mo: 0.26-0.35%, and N≤0.005%. Production steps: molten iron desulphurization; smelting and refining by an electric furnace or converter; continuous casting; descaling treatment before entering a soaking pit; soaking; heating; high pressure water descaling before entering a rolling mill; rolling; cooling; coiling; austenitizing; mold stamping forming; and quenching. The thermoforming steel is high strength, has a short manufacturing process and good product surface quality, and the accuracy of thickness may be controlled within ±0.03mm, thus greatly reducing energy consumption.
Inventors:
MAO XINPING (CN)
PAN LIBO (CN)
HU KUANHUI (CN)
WANG SHUIZE (CN)
GE RUI (CN)
LI LIJUN (CN)
PENG TAO (CN)
DUAN XIAOPING (CN)
FANG FANG (CN)
PAN LIBO (CN)
HU KUANHUI (CN)
WANG SHUIZE (CN)
GE RUI (CN)
LI LIJUN (CN)
PENG TAO (CN)
DUAN XIAOPING (CN)
FANG FANG (CN)
Application Number:
PCT/CN2017/095492
Publication Date:
March 01, 2018
Filing Date:
August 01, 2017
Export Citation:
Assignee:
WUHAN IRON & STEEL CO LTD (CN)
International Classes:
C22C38/06
Foreign References:
| CN106086684A | 2016-11-09 | |||
| CN103320702A | 2013-09-25 | |||
| CN102296242A | 2011-12-28 | |||
| CN101586208A | 2009-11-25 |
Attorney, Agent or Firm:
HUBEI WUHAN YONGJIA PATENT AGENCY CO., LTD (CN)
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