原位自生(Cr,Fe)_7C_3/Fe_3Al复合材料组织结构及物相组成的研究  

Microstructure and phase composition of in-situ (Cr,Fe)_7C_3/Fe_3Al Composites

作　　者：姜放 沈婕 袁建鹏 杜开平 JiangFang;Shen Jie;Yuan Jianpeng;DU Kaiping(Beijing General Institute of Mining and Metallurgy, Beijing 100070;BGRIMM Technology Group, Beijing 100160;Beijing Key Laboratory of Special Coating Materials and Technology, Beijing 102206;BGRIMM Advanced Materials Science ＆ Technology Co., Ltd, Beijing 102206)

机构地区：[1]北京矿冶研究总院,北京100070 [2]特种涂层材料与技术北京市重点试验室,北京102206 [3]北京市工业部件表面强化与修复工程技术研究中心,北京102206 [4]北京矿冶科技集团有限公司,北京100160

出　　处：《热喷涂技术》2018年第1期55-61,共7页Thermal Spray Technology

基　　金：北京市基地建设和人才培养专项(Z171100002217061)

摘　　要：本文通过真空雾化方法制备原位自生(Cr,Fe)_7C_3/Fe_3Al粉末,采用显微硬度,SEM,TEM,XRD等分析方法对制品的成分,表面形貌,物相组成,及硬度等进行初步分析。研究结果表明,(Cr,Fe)_7C_3/Fe_3Al粉末硬度较Fe3Al粉末有明显提高,同时急速冷却状态下,Fe_3Al粉末与(Cr,Fe)_7C_3/Fe_3Al粉末中基体相皆由DO_3型有序相Fe_3Al组成,Cr以固溶方式存在于基体中。(Cr,Fe)_7C_3以类珠光体团簇状均匀弥散分布在基体之中,碳化物保持Cr_7C_3点阵类型,Fe原子固溶在其中。In this paper, in-situ （Cr,Fe）7C3/Fe3Al powder was prepared by the vacuum atomization. The composition, surface morphology, phase composition and hardness of products were analyzed by microhardness, SEM, TEM and XRD. The results show that the hardness of （Cr,Fe）7C3/Fe3Al powder is signiflcantly higher than that of Fe3Al powder. The matrix phases of Fe3Al powder and （Cr,Fe）7C3/Fe3Al powder are all composed of DO3 type ordered phase Fe3Al in rapid cooling state. In addition, Cr exists in the matrix in solid solution. The （Cr,Fe）7C3 is distributed uniformly in the matrix with the like cluster of pearlite clusters, and the carbides keep the lattice type of Cr7C3, and the Fe atoms are dissolved in it.

关 键 词：原位自生 真空雾化 (Cr Fe)7C3/Fe3Al 

分 类 号：TG174.4[金属学及工艺—金属表面处理]