感应熔覆铁基合金涂层的显微组织与性能

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引用本文:	张攀，张伟，于鹤龙，张梦清，赵锐.感应熔覆铁基合金涂层的显微组织与性能[J].中国表面工程,2016,29(1):39~45
	ZHANG Pan, ZHANG Wei, YU Helong, ZHANG Mengqing, ZHAO Rui.Microstructure and Properties of Fe-based Alloy Coatings Synthesized by Induction Cladding[J].China Surface Engineering,2016,29(1):39~45

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感应熔覆铁基合金涂层的显微组织与性能
张攀，张伟，于鹤龙，张梦清，赵锐^1,2
1. 装甲兵工程学院a. 再制造技术重点实验室， b. 装备维修与再制造工程系，北京 100072;2. 中国人民解放军66222部队，北京 102200

摘要:

采用感应熔覆技术在奥氏体不锈钢1Cr18Ni9Ti基体上制备了Fe基合金涂层。利用带有能谱仪的场发射扫描电镜(FESEM)分析了熔覆层的显微组织形貌和元素组成，使用X射线衍射仪分析了涂层的物相组成，采用差热分析仪对合金粉末进行了热分析，用显微硬度计和摩擦磨损试验机测试了涂层的显微硬度及干摩擦条件下的滑动磨损性能。结果表明，感应熔覆铁基合金涂层组织致密，内部和界面无孔隙，涂层与基体形成了良好的冶金结合；涂层主要由αFe、(Cr,Fe)7C3、Cr7C3、Ni3Fe和Fe3C等组成，且αFe中均匀分布颗粒细小的 (Cr,Fe)7C3、Cr7C3析出相；涂层显微硬度约为250 HV0.1；在不同载荷下，感应熔覆Fe基合金涂层的耐磨损性能均优于1Cr18Ni9Ti基体，涂层磨损机理为典型的层状剥落和粘着磨损。

关键词: 感应熔覆 Fe基合金显微组织摩擦学性能

DOI：10.11933/j.issn.1007-9289.2016.01.006

分类号:

基金项目:

Microstructure and Properties of Fe-based Alloy Coatings Synthesized by Induction Cladding

ZHANG Pan, ZHANG Wei, YU Helong, ZHANG Mengqing, ZHAO Rui^1,2

1a.Science and Technology on Remanufacturing Laboratory, 1b.Department of Equipment Maintenance and Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072;2.Troop at No.66222 of the Chinese People’s Liberation Army, Beijing 102200

Abstract:

Fe-based alloy coatings were prepared on austenite stainless steel (1Cr18Ni9Ti) by induction cladding. Surface morphology, microstructure and composition of cladding coatings were analyzed by field emission scanning electron microscopy (FESEM) with energy dispersive spectrometer(EDS). Xray diffraction (XRD) was used to analyze phase composition of the coatings. Differential scanning calorimetry (DSC) was used to study the exothermic reactions of the coatings. The microhardness of the coatings were tested by a microhardness, and the sliding tribological properties were tested by CETR tribometer under dry condition.The results indicate that the microstructure of coatings is compact, and there are no pores in the coatings or in the interface. Metallurgical bonding can be achieved between the coatings and the matrix. The composite coatings consist of αFe, (Cr,Fe)7C3, Cr7C3, Ni3Fe and Fe3C, et al. Precipitated (Cr,Fe)7C3 and Cr7C3fine particles are uniformly distributed in αFe.The microhardness of the cladding coatings is about 250 HV0.1. The tribological properties of the coatings are better than that of the base under different load and the wear mechanisms of the coatings are lamellar stripping and adhesive wear.

Key words: induction cladding Febased alloy microstructure tribological properties