Title:
INTEGRATED PROCESS OF HOT STAMPING AND DIE TRIMMING
Document Type and Number:
WIPO Patent Application WO/2019/033711
Kind Code:
A1
Abstract:
An integrated process of hot stamping and die trimming, comprising the steps of blanking, preheating of a trimming die, heating, primary transfer, hot stamping and in-die primary quenching, secondary transfer, carbon distribution and die trimming, die opening and secondary quenching, post-processing, and the like. Compared with the prior art, this process can obtain ultra-high strength steel products with high strength and good plasticity; by performing die trimming simultaneously in a carbon distribution stage, carbon distribution time can be utilized more effectively so as to increase the production rate of a Q&P hot stamping process; since the deformation resistance of sheet metal in the carbon distribution stage is low, abrasion of the trimming die can be significantly reduced, an existing laser trimming method for ultra-high strength steel can thus be replaced with the die trimming, and thus the production cycle is greatly shortened.
Inventors:
HAN XIANHONG (CN)
LI YUANYUAN (CN)
CHEN JUN (CN)
CUI ZHENSHAN (CN)
LI YUANYUAN (CN)
CHEN JUN (CN)
CUI ZHENSHAN (CN)
Application Number:
PCT/CN2018/073786
Publication Date:
February 21, 2019
Filing Date:
January 23, 2018
Export Citation:
Assignee:
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
B21D35/00; C21D1/18; C21D8/02
Domestic Patent References:
| WO2004022794A1 | 2004-03-18 | |||
| WO2017108956A1 | 2017-06-29 |
Foreign References:
| CN107597962A | 2018-01-19 | |||
| CN104550391A | 2015-04-29 | |||
| CN106424280A | 2017-02-22 | |||
| CN106734465A | 2017-05-31 | |||
| CN103394573A | 2013-11-20 |
Other References:
YANG KUN ET AL.: "Experimental research on mechanical trimming process of ultra high strength steel", JOURNAL OF PLASTICITY ENGINEERING, vol. 22, no. 4, 31 August 2015 (2015-08-31), pages 99, 100, ISSN: 1007-2012
Attorney, Agent or Firm:
SHANGHAI KESHENG INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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