Effect of quenching and partitioning temperature on mechanical properties and  hole expansion property of 1180 MPa Q&P steel

doi:10.13251/j.issn.0254-6051.2023.12.009

Abstract

Abstract: Effects of quenching temperature and partitioning temperature on mechanical properties and hole expansion property of a 1180 MPa Q&P steel were investigated. The results show that after quenching at 250-300 ℃ and partitioning at 420 ℃, the tested steel can achieve a good match of high elongation and high hole expansion ratio, where the microstructure is mainly composed of lath tempered martensite and retained austenite, the film shaped retained austenite provides high elongation, the tempered martensite provides high hole expansion ratio.

Key words: quenching temperature, partitioning temperature, tempered martensite, hole expansion ratio, retained austenite

CLC Number:

TG142.1

Jiang Yinghua, Li Zhao, Yang Feng, Zhang Shijie. Effect of quenching and partitioning temperature on mechanical properties and hole expansion property of 1180 MPa Q&P steel[J]. Heat Treatment of Metals, 2023, 48(12): 60-64.

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Effect of quenching and partitioning temperature on mechanical properties and hole expansion property of 1180 MPa Q&P steel

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