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

doi:10.13251/j.issn.0254-6051.2020.10.021

Abstract

Abstract: 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.

Key words: electrothermal alloy, Fe-Cr-Al alloy, Ni-Cr-(Fe) alloy, microstructure, grain size, texture

CLC Number:

TG132.2

Zhang Qiang, Zhu Zhixiang, Chen Baoan, Ding Yi, Chen Xin, Zhang Ning, Meng Li. Microstructure and texture of typical Fe-Cr-Al and Ni-Cr-(Fe) electrothermal alloy wires[J]. Heat Treatment of Metals, 2020, 45(10): 104-107.

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