引用本文:梁秀兵,王慧,商俊超,范建文,陈永雄.FeCrBSiNb非晶涂层的制备及其性能[J].中国表面工程,2017,30(1):101~106
LIANG Xiu-bing,WANG Hui,SHANG Jun-chao,FAN Jian-wen,CHEN Yong-xiong.Fabrication and Properties of FeCrBSiNb Amorphous Coating[J].China Surface Engineering,2017,30(1):101~106
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FeCrBSiNb非晶涂层的制备及其性能
梁秀兵, 王慧, 商俊超, 范建文, 陈永雄
装甲兵工程学院 机械产品再制造国家工程研究中心, 北京 100072
摘要:
采用火焰喷涂自制的FeCrBSiNb气雾化合金粉末，制备了高非晶含量的Fe基非晶涂层。利用X射线衍射仪、扫描电镜和透射电镜分析了粉末和涂层的相组织结构、表面形貌和微观特征。结果表明：FeCrBSiNb合金粉末主要有FeCrSi固溶体和B化物组成，粉末球形度较好，大颗粒粉末表面粗糙，主要为枝晶状组织，并伴有“卫星”球。制备的FeCrBSiNb非晶涂层润湿性较好，粒子搭接边界不明显，非晶体积分数高达80%。非晶涂层存在少量孔隙，主要是未熔颗粒的嵌入、熔融粒子凝固时的“骤冷”应力和气体逸出造成。FeCrBSiNb非晶涂层在532~644℃存在明显放热峰，玻璃转变温度Tg为509℃，开始晶化温度Tx为532℃，其形成非晶相的临界冷却速率为3.458×103 K/s，在同一试验条件下，非晶涂层的相对耐磨性是45钢基体的2.6倍。
关键词:  Fe基  非晶涂层  合金粉末  火焰喷涂
DOI：10.11933/j.issn.1007-9289.20160714001
分类号:
基金项目:国家自然科学基金（51375492，51575527）；教育部新世纪优秀人才支持计划（NCET-13-1068）
Fabrication and Properties of FeCrBSiNb Amorphous Coating
LIANG Xiu-bing, WANG Hui, SHANG Jun-chao, FAN Jian-wen, CHEN Yong-xiong
National Engineering Research Center for Mechanical Product Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072
Abstract:
FeCrBSiNb amorphous coating was prepared by flame spraying using the alloy powder fabricated by gas atomization. The phase composition, morphology and microstructure were investigated by XRD, SEM and TEM, respectively. The results show that the FeCrBSiNb alloy powder is mainly composed of FeCrSi solid solution and boride crystalline phase. Most particles are in near-spherical shape accompanied with some balls like satellites. It is mainly dendritic structure around the rough surface of big particles. The coating has a very high amorphous phase content up to 80%. The boundary of the particles melted well is not obvious. Some pores located between flattened droplets are observed in the coating, which mainly caused by the loose packed layer structure and gas porosity phenomenon and so on. The FeCrBSiNb amorphous coating crystallizes at 532-644℃. The glass transition top temperature Tg is about 509℃ and the onset top first crystallization event Tx is about 532℃. The critical cooling rate for glass formation of FeCrBSiNb coating is calculated to be 3.458×103 K/s. The wear resistance of the amorphous coating is 2.6 times compared with that of the 45 steel substrate.
Key words:  Fe-based  amorphous coating  alloy powder  flame spraying
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