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ASM Handbook

Steel Heat Treating Fundamentals and Processes

Edited by
Jon L. Dossett
Jon L. Dossett
Consultant
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George E. Totten
George E. Totten
Portland State University
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ASM International
Volume
4A
ISBN electronic:
978-1-62708-165-8
Publication date:
2013
Book Chapter

Quenching and Partitioning Steel Heat Treatment

By
Li Wang
Li Wang
Automotive Steel Research Institute and Baoshan Iron & Steel Company, Ltd.
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John G. Speer
John G. Speer
Colorado School of Mines
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Published:
2013
Page range:
317 - 326
Publication history
July 08, 2013

Abstract

Quenching and partitioning (Q&P) steel is a term used to describe a series of C-Si-Mn, C-Si-Mn-Al, or other steels subjected to the quenching and partitioning heat treatment process. This article discusses the Q&P steel's chemical compositions and mechanical properties, and provides an overview of the important background and product characteristics with a focus on the automotive sheet steel application. It schematically represents the continuous annealing process, consequent phase-transformation behaviors, and forming-limit curves of Q&P steels. The article describes the parameters associated with resistance spot welding, laser welding, and metal active gas welding. It also provides useful information of retained austenite volume fraction measured by x-ray diffraction and electron backscatter diffraction. The article also examines microstructure evolution during tensile testing at different strain levels using electron backscatter diffraction.

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Li Wang, John G. Speer, 2013. "Quenching and Partitioning Steel Heat Treatment", Steel Heat Treating Fundamentals and Processes, Jon L. Dossett, George E. Totten

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