16Mn钢类裂缝冲击试样的韧脆断裂转变行为研究  

Research into Ductile to Brittle Transition Behavior in A Crack Like Notched Impact Specimen of 16Mn Steèl

作　　者：类维生[1] 苏燕[1] 姚枚[2] 陈丙森[3] 

机构地区：[1]冶金部钢铁研究总院 [2]燕山大学 [3]清华大学

出　　处：《材料科学与工程》1997年第3期66-68,共3页Materials Science and Engineering

基　　金：高校博士点基金;国家自然科学基金

摘　　要：对１６Ｍｎ钢类裂缝缺口试样进行了系列温度的示波冲击试验，以考察断裂载荷及冲击吸收功随温度的变化特性，发现在有效断裂载荷谷值点对应的温度Ｔｃ，＊ｄ处发生断裂的韧脆转变，该温度受控于材料的解理特征应力Ｓｃｏ。此外，落锤试验还表明：该钢的零塑性转变温度ＮＤＴ即为Ｔｃ＊，ｄ。Instrumented impact tests of specimens with a crack like notch of 16Mn steel were carried out to investigate the fracture load and the absorbed energy vs.temperature characteristics.It is indicated that at the temperature Tc*,d corresponding to the valley value of fracture load there occures the ductile to brittle transition of the specimen,which is also controlled by the cleavage characteristic stress Sco.Moreover,the drop weight test of the steel showed that the nil ductility transition temperature(NDTT)is in fact the very temperature Tc* ,d.

关 键 词：类裂缝缺口 示波冲击 韧脆转变 锰钢 

分 类 号：TG142.33[一般工业技术—材料科学与工程] TG115.5[金属学及工艺—金属材料]