期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.03.006
关键词
Bainitic steel; Q&P process; Retained austenite; Mechanical property
类别
资金
- Fundamental Research Funds for Center Universities [2015YJS131]
- National Science Foundation of China [51301012]
- National Basic Research Program of China (973 Program) [2015CB654804]
- Center for Structure and Function Material Research and Innovation
- Department of Metallurgical and Materials Engineering, University of Texas at El Paso, TX, USA
We elucidate here the mechanistic contribution of the application of quenching and partitioning (Q&P) concept to a high carbon Mn-Si-Cr steel in obtaining a multiphase microstructure comprising of martensite/austenite and nanostructured bainite (bainitic ferrite and nanometer-sized film-like retained austenite) that exhibited tensile strength of 1923 MPa and total elongation of 18.3%. The excellent mechanical properties are attributed to the enhanced refinement of blocky austenite islands obtained by the Q&P process. The austenite was stabilized by both carbon partitioning from martensite and bainite transformation. Compared with conventional heat treatment to produce nanostructured bainite, the total time is significantly reduced without degradation of mechanical properties. (C) 2016 Elsevier B.V. All rights reserved.
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