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Fundamental research for the development of new high temperature Fe-Cr-Mn alloys.

新型高温Fe-Cr-Mn合金开发的基础研究。

基本信息

批准号：
03452256
负责人：
MIYAHARA Kazuya
金额：
$ 0.58万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452256/
关键词：
fusion reactor materials heat resisting steel high Mn-Cr austenitic steels high temperature strength creep-rupture strength low radioactivation materials low temperature toughness 高Mn-Cr鋼マンガン鋼耐熱合金 FeーCrーMnー合金

项目摘要

High Mn-Cr austenitic steels are considered to be an important high temperature structural material from the point of view of fast induced radioactivity decay(FIRD) and non-magneticity. The objective of the present project is to make a fundmental research on the microstructure and mechanical properties of 12% Cr-15%Mn austenitic stainless steels for the development of FIRD amterial for the first wall structural materials of future fusion reactor and to compare these properties with those of the reference materials of JPCAs and JFMS,which are being investigated for the development of fusion reactor structural materials in Japan.The effects of the alloying elements V,Ti, Ta etc. were investigated to determine the improvement of mechanical properties. Tiny precipitates of VN and Ti(C,N)raised the high-temperature strength considerably. Content of 0.1 to 0.2%C,however, formed very coarse precipitates of M_<23>C_6 type carbide on the grain boundaries, which deteriorated low temperature toughness inducing intergranular fracture. Addition of 0.2%N and more was very effective for the restraining of coarse carbide on grain boundaries and to improve creep-rupture ductility considerably. Furthermore, the most appropriate combination of V,Ti and Ta addition should be investigated.

从快速诱发放射性衰变（FIRD）和非磁性的角度来看，高锰铬奥氏体钢被认为是重要的高温结构材料。本项目的目的是对12%Cr-15%Mn奥氏体不锈钢的显微组织和力学性能进行基础研究，用于开发未来聚变反应堆第一壁结构材料的FIRD材料，并将这些性能与日本正在研究的用于聚变反应堆结构材料开发的JPCA和JFMS参考材料的性能进行比较。研究了V、Ti、Ta等以确定机械性能的改善情况。 VN和Ti(C,N)的微小析出物显着提高了高温强度。然而，0.1～0.2％C的含量在晶界上形成非常粗大的M_ 23 C_6型碳化物析出物，这使低温韧性变差，引起晶间断裂。添加0.2%及更多的N对于抑制晶界粗大碳化物非常有效，并显着提高蠕变断裂延展性。此外，还应研究最合适的 V、Ti 和 Ta 添加组合。