Influence of QLT treatment on microstructure and mechanical properties of a high nickel steel

被引：46
|
作者：
Wu, S. J. [1 ]
Sun, G. J. [1 ]
Ma, Q. S. [2 ]
Shen, Q. Y. [2 ]
Xu, L. [2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Shougang Res Inst Technol, Beijing 100043, Peoples R China
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2013年 / 213卷 / 01期
关键词：
QLT treatment; L process; T tempering; Retained austenite; PRECIPITATED AUSTENITE; HEAT-TREATMENT; MARTENSITE; TOUGHNESS;
D O I：
10.1016/j.jmatprotec.2012.08.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
After direct quenching from 870 degrees C. the samples were subjected to secondary quenching (L) at different intercritical temperatures within the two-phase region and various tempering temperatures (T). Optical microscopy and scanning electron microscopy were employed to analyse the distributions of phases and grain sizes, and transmission electron microscopy was used to reveal the morphology of martensite and retained austenite. Charpy impact specimens of the steel after different heat treatment were tested. Results show that QLT treatment gives the best impact toughness values compared with the rolling condition and conventional quenching and tempering process, and the optimum QLT heat treatment parameters are determined as Q: 870 C, L: 770 degrees C, and T: 580 degrees C. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：120 / 128
页数：9
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