Fe-Cr-Al电热合金的研究进展

DEVEIDPMENT OF Fe-Cr-Al ELECTROTHERMIC ALLOYS

本文介绍了传统电热体材料的分类、特点及其用途，着重评述了传统Ｆｅ－Ｃｒ－Ａｌ电热合金如１Ｃｒ１３Ａ１４及０Ｃｒ２５Ａ１５的优、缺点及应用领域．对现有Ｆｅ－Ｃｒ－Ａｌ电热合金所存在的主要缺点及其改进措施进行了分析，同时指出，采用粉末冶金工艺，既可提高高温强度、抗氧化性，又可改善加工性能、降低晶粒长大倾向。此外，还介绍了国内外Ｆｅ－Ｃｒ－Ａｌ合金的研究现状及我国开展此项研究工作的现实意义和潜在效益．最后，分析了Ｆｅ－Ｃｒ－Ａｌ合金的市场前景、经济效益，并指出，用粉末冶金方法制取Ｆｅ－Ｃｒ－Ａｌ电热合金是Ｆｅ－Ｃｒ－Ａｌ合金研究的重点和将来的发展方向．

The classifications, characteristics and applications of conventional electrothermic materials are introduced in this paper. First, the advantage, shortcoming and applied field of the Fe--Cr--Al heating alloys, such as 1Cr13A14 and OCr25A15 alloys, are reviewed emphatically. In addition, the main defectsand its improvement measures of the Fe--Cr--Al alloys now available have been studied, and theresults show that high temperature strength, oxidation--resistance and workability of the Fe-Cr--Alalloys can be improved by adopting powder metallurgy (P/M) technology. Secondly, the status ofdevelopment of the Fe-Cr--Al alloys research fields at home and abroad, practical sighficance andpotential benefit of the Fe-Cr-AI alloys development in our country have been introduced. Finally,the prospects of market and economic returns of the Fe-Cr--Al alloys have been analyzed, and the results show that the Fe--Cr--Al alloys by the P/M method are focal emphasis and developmentorientation in the Fe-Cr-Al alloys research work in the future.