期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 222, 期 -, 页码 181-187出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2015.03.010
关键词
Long-partitioning; Bainite; AHSS; Impact toughness; Large-scale production
资金
- Scientific Research Foundation for Young Teachers of Sichuan University [2014SCU11019]
- Science and Technology Department of Sichuan Province, China [2014GZ0087]
- Science &Technology and Intellectual Property Department of Panzhihua, China [2014CY-C-3]
- National Natural Science Foundation of China [51401135]
A quenching-long partitioning (Q-LP) heat treatment has been proposed for large-scale industrial production of steel components. Compared to the conventional quenching-tempering (Q-T) and quenching-partitioning (Q-P) process, the steel treated by air-quenching from austenitizing temperature and 60 min-partitioning at 200 degrees C exhibits the best combination of strength and toughness. With a nearly unchanged product of strength and elongation of around 18 GPa%, the room-temperature impact toughness has been significantly improved from 84J/cm(2) for the air Q-T treatment to 104J/cm(2) for the Q-LP treatment, which is attributed to the more retained austenite and the effective relief of the microstresses. The multi-phase microstructure of the Q-LP treated steel contains martensite, bainite and retained austenite exhibiting two different morphologies, i.e., one is the inter-lath plates, and the other is the austenite films within the bainite plates. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据