典型Fe-Cr-Al及Ni-Cr-(Fe)系电热合金丝的显微组织与织构  

Microstructure and texture of typical Fe-Cr-Al and Ni-Cr-(Fe)electrothermal alloy wires

作　　者：张强 祝志祥 陈保安 丁一 陈新 张宁[2] 孟利[2] Zhang Qiang;Zhu Zhixiang;Chen Baoan;Ding Yi;Chen Xin;Zhang Ning;Meng Li(State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,China;Metallurgical Technology Institute,Central Iron&Steel Research Institute,Beijing 100081,China)

机构地区：[1]全球能源互联网研究院有限公司先进输电技术国家重点实验室,北京102211 [2]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《金属热处理》2020年第10期104-107,共4页Heat Treatment of Metals

基　　金：高压大功率电热储能炉电阻丝制备及性能优化研究(52550018001J)。

摘　　要：选取了两类典型电热合金丝材成品进行了检测,对比分析了合金丝的显微组织及织构,包括Fe-Cr-Al系的国产0Cr25Al5合金与进口0Cr22Al5合金和Ni-Cr-(Fe)系的国产Cr20Ni80合金与Cr20Ni30合金。结果表明:进口Fe-Cr-Al合金的平均晶粒尺寸相对较大,晶粒尺寸分布较为均匀,而织构较弱;国产0Cr25Al5合金的平均晶粒尺寸均匀程度较差,而较粗的样品平均晶粒尺寸较大且织构稍弱,接近于进口Fe-Cr-Al合金,表明较粗的丝材制备形变量较小。Ni-Cr-(Fe)系的合金均表现为不均匀的晶粒组织,而Cr20Ni80合金相较于Cr20Ni30合金的大尺寸晶粒更多;减小合金丝材的直径有细化组织作用,同时还能增强两种Ni-Cr合金丝中均存在的<111>丝织构。Two kinds of typical electrothermal Fe-Cr-Al alloy wires including domestic 0Cr25Al5 alloy wire and imported 0Cr22Al5 alloy wire and Ni-Cr-(Fe)alloy wires including domestic Cr20Ni80 and Cr20Ni30 alloy wires were investigated,and the microstructure as well as texture of different samples were compared and analyzed.The results show that more uniform microstructure is observed in imported Fe-Cr-Al alloy wire,in which larger average grain size and weak texture are shown.For the domestic 0Cr25Al5 alloy wires,rather heterogeneous microstructure is displayed,and the weaker texture and higher average grain size in coarser wires are attributed to lower deformation strain during preparation process.Regarding the Ni-Cr-(Fe)alloy wires,heterogeneous microstructures are obtained in both Cr20Ni80 and Cr20Ni30 alloys,but the higher fraction of large grains are shown in Cr20Ni30 alloy wires.The lower wire diameter leads to finer microstructure,as well as strengthening<111>texture which exists in both kinds of Ni-Cr-(Fe)alloy wires.

关 键 词：电热合金 FE-CR-AL合金 Ni-Cr-(Fe)合金 显微组织 晶粒尺寸 织构 

分 类 号：TG132.2[一般工业技术—材料科学与工程]