Effect of austempering treatment on microstructure and mechanical properties of high-Si steel

被引：33
|
作者：
Mandal, D. [1 ]
Ghosh, M. [1 ]
Pal, J. [1 ]
De, P. K. [1 ]
Chowdhury, S. Ghosh [1 ]
Das, S. K. [1 ]
Das, G. [1 ]
Ghosh, Sukomal [1 ]
机构：
[1] Natl Met Lab, Met Extract & Forming Div, Jamshedpur 831007, Bihar, India
来源：
JOURNAL OF MATERIALS SCIENCE | 2009年 / 44卷 / 04期
关键词：
STRAIN-INDUCED MARTENSITE; RETAINED AUSTENITE; DUCTILE IRON; SILICON STEELS; CAST STEEL; TEMPERATURE; BAINITE; TRANSFORMATION;
D O I：
10.1007/s10853-008-3203-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present investigation, the influence of austempering treatment on the microstructure and mechanical properties of silicon alloyed cast steel has been evaluated. The experimental results show that an ausferrite structure consisting of bainitic ferrite and retained austenite can be obtained by austempering the silicon alloyed cast steel at different austempering temperature. TEM observation and X-ray analysis confirmed the presence of retained austenite in the microstructure after austempering at 400 A degrees C. The austempered steel has higher strength and ductility compared to as-cast steel. With increasing austempering temperature, the hardness and strength decreased but the percentage of elongation increased. A good combination of strength and ductility has been obtained at an austempering temperature of 400 A degrees C.
引用
收藏
页码：1069 / 1075
页数：7
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