Method for improving low-alloy high-strength steel structure and performance
Title：
Method for improving low-alloy high-strength steel structure and performance
Application Number：
 200710177968
Application Date：
 2007/11/23
Announcement Date：
 2008/04/09
Pub. Date：
Publication Number：
 101158005
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C22C 33/04, C22C 38/12, C21D 8/00
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Yang Zhigang, Zhang Chi, Tao Peng
Key Words：
 improve, low-alloy, high-strength steel, structure, performance
Abstract：
 The invention relates to a method to improve the structure and performance of low alloy high strength steel, belonging to the field of steel material. The invention re-smelts industrialized low alloy high strength steel by using a vacuum induction electric oven to increase the sulfur and vanadium content, leads MnS and V(C,N) to be separated out in a relatively low temperature for a proper time after austenitizing, and conduct proper stress on the austenite area to deform, cool down to ferrite and stay in such temperature for a proper time, and then air-cool down to the room temperature, the process improves the structure of low alloy high strength steel, levels up the mechanical performance. The leaching volume in the invention can be easily controlled, austenite deforming process is easy and practical and cheap, which can be directly applied to the improvement of the structure and performance of the low alloy high strength steel, in particular to increase the ferrite volume in the crystal and thin the structure of the whole steel. The increase in intention and tenacity widens the application of low alloy high strength steel to a great extent.
Claim：
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PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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