Influence of Retained Austenite on the Mechanical Properties of Low Carbon Martensitic Stainless Steel Castings

被引：1
|
作者：
Tabatabae, Behnam Akhavan [1 ]
Ashrafizadeh, Fakhreddin [1 ]
Hassanli, Ali Morad [2 ,3 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
[2] Shiraz Univ, Mawson Lakes, SA 5009, Australia
[3] Univ S Australia, Sch Nat & Built Environm, Mawson Lakes, SA 5009, Australia
来源：
ISIJ INTERNATIONAL | 2011年 / 51卷 / 03期
关键词：
martensitic stainless steel; tempering treatment; retained austenite; tensile test; impact test; MICROSTRUCTURE; TEMPERATURE;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The amount of retained austenite formed during tempering process can moderately improve the structure and properties of martensitic stainless steels. In the present study, 25 heat treatment cycles were carried out on specimens cast in CA6NM in order to investigate the effect of tempering treatment on the structure and mechanical properties of this alloy. X-Ray diffraction, mechanical testing, optical and scanning electron microscopy were employed for evaluation of the specimens. SEM micrographs and X-ray diffraction patterns indicated that with enhancement of tempering temperature, the amount of retained austenite initially increased and then decreased. The changes in mechanical properties of specimens including hardness, impact toughness, elongation, yield and tensile strength were found to depend mainly on the amount of retained austenite. Such variations are discussed in terms of amount of retained austenite and its stability during tempering process of martensite.
引用
收藏
页码：471 / 475
页数：5
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