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| Role of Mn and P in Texture of Bake Hardening Steel during Heat Treatment |
| Hua WANG1,2,Hong-lin YANG3,Lin LI2,Li WANG1 |
1. State Key Laboratory of Development and Application Technology of Automotive BaoSteel, Shanghai 201900,China
2. College of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Samples of three ultra-low carbon bake hardening (ULC-BH) steels (BH-0, BH-Mn, and BH-P) were prepared by two annealing processes followed by water quenching and overaging. The texture evolution in the as-treated steels was explored via EBSD and ODF, and the roles of Mn and P elements as well as heat treatment processes in the texture orientation and intensity were investigated. It is found that overaging significantly increases texture intensity of BH-0 and BH-Mn steel, while markedly hinders the texture development in BH-P steel. Based on the microstructure analysis, it can be deduced that the texture variations in BH-0 and BH-Mn steels mainly contribute to carbide (in BH-0 and BH-Mn steels) and manganese containing compound (in BH-Mn steel) or partially to C segregation to dislocation, while the texture variation in BH-P steel is mainly caused by the P and C co-segregation formed during quenching.
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Received: 15 April 2013
Published: 01 August 2014
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| Fund:Project guided by science and technology in Inner Mongolia Autonomous Region |
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Corresponding Authors:
Hua Wang
E-mail: hwang225@gmail.com
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2014, Vol. 21 
