High cycle rotating bending fatigue property in high strength casting steel with carbide free bainite

被引：6
作者：
Carmo, D. J. [1 ]
Dias, J. F.
Santos, D. B. [2 ]
机构：
[1] SENAI CETEF, Serv Nacl Aprendizagem Ind, Ctr Tecnol Fundicao, Itauna, Brazil
[2] Univ Fed Minas Gerais, Dept Met & Minas, Pampulha, Brazil
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2012年 / 28卷 / 08期
关键词：
Cast steel; Fatigue; Bainitic; Austempering; Nanostructure; SILICON;
D O I：
10.1179/1743284712Y.0000000047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work shows a steel structure with bainitic ferrite dispersed on a matrix of carbon enriched retained austenite. The steel was produced using an air melting technique, and it was austempered at 200 degrees C for 240 h. The steel presents tensile strength of similar to 2 GPa. The authors report the new results of resistance to high cycle rotating fatigue in high strength bending life limit 10(7) cycles. A fatigue strength of 593 MPa was obtained, a result that is higher than that presented by important engineering materials such as forged steel and austempered ductile iron, even with the presence of fracture type 'fish eye', which nucleates mainly on shrinkage defects.
引用
收藏
页码：991 / 993
页数：3
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