The Ductile to Brittle Transition Behavior of the Modified 9Cr-1Mo Steel and Its Laser Welds
来源期刊：材料导报2004年第8期
论文作者：R.K.Shiue C.Chen H.C.Wu
关键词：modified 9Cr-1Mo steel; laser welding; impact toughness; ductile to brittle transition temperature;
摘 要：The ductile to brittle transition temperature (DBTT) of the modified 9Cr-1Mo steel and its laser welds was studied. The increase in grain size of the weld structure ascended the DBTT of the steel significantly. The transformation of retained austenite at martensite interlath boundaries into untempered and/or twinned martensite could also contribute to increased DBTTs of the steel and its welds tempered at 540℃.
R.K.Shiue1，C.Chen2，H.C.Wu2
(1.Department of Materials Science and Engineering, Dong Hwa University, Hualien 974, China Taiwan;
2.Department of Materials Science and Engineering, Taiwan University, Taipei 106, China Taiwan)
摘要:The ductile to brittle transition temperature (DBTT) of the modified 9Cr-1Mo steel and its laser welds was studied. The increase in grain size of the weld structure ascended the DBTT of the steel significantly. The transformation of retained austenite at martensite interlath boundaries into untempered and/or twinned martensite could also contribute to increased DBTTs of the steel and its welds tempered at 540℃.
关键词:modified 9Cr-1Mo steel; laser welding; impact toughness; ductile to brittle transition temperature;
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