Austempering of spheroidal graphite cast iron

被引：10
|
作者：
El-Baradie, ZM [1 ]
Ibrahim, MM [1 ]
El-Sisy, IA [1 ]
Abd El-Hakeem, AA [1 ]
机构：
[1] Cairo Univ, Fac Engn, Cairo, Egypt
来源：
MATERIALS SCIENCE | 2004年 / 40卷 / 04期
关键词：
D O I：
10.1007/s11003-005-0071-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study gray spherulitic cast iron, its microstructure, hardness ultimate strength in tension, elongation, and impact toughness as functions of the duration of isothermal austenitizing in the bainite region at 350 and 400 degrees C after austenitizing at 900 degrees C. As the temperature of quenching increases from 350 to 400 degrees C, the microstructure of the analyzed cast iron changes from lower to higher bainite and the amount of retained austenite increases (its maximum is attained after 1 h). At the same time, the ultimate strength in tension and hardness decrease, whereas the elongation and fracture toughness increase.
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页码：523 / 528
页数：6
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