新型铁基高温合金成分及组织分析

The Composition of and Microstructure Analysis on the New Fe-based Refractory Alloy

研究了新型铁基高温合金中各合金元素的成分含量及作用,通过理论分析和实验过程找到各种合金元素的最佳配比,并进行合金化设计。运用X-射线衍射仪、光学显微镜、硬度计等测试手段和电化学分析方法,探讨了合金成分、热处理工艺对新型铁基高温合金的组织及性能的影响。结果表明:奥氏体型耐热钢经固溶—时效处理后,其组织为奥氏体基体以及弥散分布的碳化物M6C,M23C6,MC和金属间化合物Laves相而M6C和Laves相为主要的高温强化相。

This paper studies on the contents and functions of each alloying agent in the new Fe-based refractory alloy, through theoretical analysis and experimental process, obtains the optimum mixture ratio of each alloying agent and makes the alloying design; By using X-ray diffractometer, optical microscope, hardmeter and other detecting measures and the electrochemical analytical method, probes into the influence of the alloying composition and heat treatment on the microstructure and properties of the new Fe-based refractory alloy; and points out that after solution/aging treatment the microstructure of the austenitic Fe-based alloy consists of austenitic base, dispersed carbides M6C and metallic compound Laves phase.