1Cr22Mn15N不锈钢的韧-脆转变机理

马玉喜; 荣凡; 周荣; 朗宇平; 蒋业华

1Cr22Mn15N不锈钢的韧-脆转变机理

1.
昆明理工大学机电工程学院, 云南昆明 650093
2.
钢铁研究总院结构材料研究所, 北京 100081

基金项目:

国家重点基础研究规划(973)资助项目(2004CB619100)

详细信息

作者简介:
马玉喜(1981-),男,河南郑州人,博士研究生.

中图分类号: TG111.91
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出版历程
- 收稿日期: 2007-04-11
- 刊出日期: 2007-10-19

Research of the Ductile to Brittle Transition of 1Cr22Mn15N Stainless Steel

摘要

摘要: 在-200℃~室温范围内,采用拉伸和夏比冲击试验测定了1Cr22Mn15N高氮奥氏体不锈钢的韧-脆转变温度(DBTT),并通过扫描电镜(SEM)、透射电镜(TEM)和X射线衍射(XRD)等方法对该钢在低温下的韧-脆转变现象进行了研究.结果表明：该钢发生韧-脆转变的温度在-110℃左右;最早出现脆性滑移平台的温度在-80℃,并有诱发的ε相出现;其断口形貌由韧窝→韧窝+准解理→解理脆断变化,断裂形式为穿晶断裂;可能是由于在脆性第二相上形成微裂纹,导致在两个滑移面之间产生穿晶脆性断裂.
- 高氮奥氏体不锈钢钢 /
- 夏比冲击试验 /
- 韧-脆转变 /
- 穿晶断裂
Abstract: The DBTT of high nitrogen austenitic stainless steel 1Cr22Mn15N was tested between room-temperature and -200℃ by tensile test and Charpy-type test,and the ductility and brittleness transition of it was investigated under low temperature by the SEM,TEM and XRD methods.The results show that for 1Cr22Mn15N,the DBTT is about -110℃.Brittle fracture occurrs first at -80℃.The change of fracture patterns of high nitrogen austenitic stainless steels is dimple→dimple+quasi-cleavage fracture→cleavage fracture,and fracture mode is transgranular fracture.ε-martensite is observed by TEM in brittle transition austenite and induced along {111}γ plane.
- high nitrogen austenitic stainless steel /
- Charpy-type test /
- ductile to brittle transition /
- transgranular fracture

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参考文献(12)

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[2]	Gavriljuk V G,Berns H.Retained austenite in martensitic steels with 15% Cr and carbon,nitrogen or both[C]//20th ASM Heat Treating Society Conference Proceedings,USA:2000.
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1Cr22Mn15N不锈钢的韧-脆转变机理

作者简介: 马玉喜(1981-),男,河南郑州人,博士研究生.

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出版历程

Research of the Ductile to Brittle Transition of 1Cr22Mn15N Stainless Steel

计量

出版历程

目录

作者简介:
马玉喜(1981-),男,河南郑州人,博士研究生.