冷喷多尺度 WC-Co 金属陶瓷涂层结构与性能研究

doi:10.3969/j.issn.1000-1093.2013.07.013

兵工学报 ›› 2013, Vol. 34 ›› Issue (7): 876-882.doi: 10.3969/j.issn.1000-1093.2013.07.013

冷喷多尺度 WC-Co 金属陶瓷涂层结构与性能研究

王洪涛¹, 陈枭¹, 白小波¹, 纪岗昌¹, 董增祥¹, 仪登亮¹, 杨凤根²

1郾九江学院机械与材料工程学院, 九江市绿色再制造重点实验室, 江西九江332005; 2郾赣州章源钨业新材料有限公司, 江西赣州341300

收稿日期:2012-10-24 修回日期:2012-10-24 上线日期:2014-08-19
作者简介:王洪涛(1975—), 男, 博士, 副教授
基金资助:
国家自然科学基金项目(50961007、51001056); 江西省自然科学基金项目(20114BAB206019、2010GQC0117); 江西省教育厅科技项目(GJJ13721、GJJ12610、GJJ11236);江西省科技落地计划项目(KJLD12096)

Research on the Microstructure and Properties of Multiple-dimensioned Cold Sprayed WC-Co Cermet Coatings

WANG Hong-tao¹, CHEN Xiao¹, BAI Xiao-bo¹, JI Gang-chang¹, DONG Zen-xiang¹, YI Deng-liang¹, YANG Fen-geng²

1.JiuJiang Key Laboratory for Green Remanufacture,School of Mechanical and Materials Engineering, JiuJiang University, Jiujiang 332005, Jiangxi, China; 2.Ganzhou Zhangyuan Tungsten New Materials Co, Ltd, Ganzhou 341300, Jiangxi, China

Received:2012-10-24 Revised:2012-10-24 Online:2014-08-19

摘要/Abstract

摘要： 以团聚烧结工艺制备的多尺度WC鄄12Co、WC鄄10Co鄄4Cr 和WC鄄17Co 粉末为原料,利用冷喷涂沉积多尺度WC鄄Co 金属陶瓷涂层,研究了涂层的组织和相结构,测定了涂层的显微硬度、弹性模量和断裂韧性,并通过销鄄盘磨损实验测定了涂层的耐磨损性能。结果表明:3 种冷喷多尺度WC鄄Co 金属陶瓷涂层组织均比较致密,涂层保持与原始粉末相同的相结构,粘结相Co 由于强烈塑性变形发生了部分同素异构转变,涂层组织无传统层状结构,WC 颗粒呈现微米、亚微米及纳米多尺度分布特征;随着喷涂粉末中粘结相含量的增加,涂层硬度和弹性模量降低、断裂韧性增加,其磨损失重有所增加;涂层磨损失效机理主要为磨粒对涂层的切削作用。

关键词: 材料失效与保护, 冷喷涂, 多尺度, WC鄄Co, 金属陶瓷涂层, 结构, 性能

Abstract: Three kind of multiple-dimensioned WC-Co cermet coatings were prepared by cold spraying of WC-12Co, WC-10Cr-4Cr and WC-17Co powders. The microstructure and phase structure of three kinds of multiple-dimensioned WC-Co coatings are analyzed. Their micro hardness, Young爷s modulus and fracture toughness are investigated, and the wear performances of three coatings are tested on a pin on disk tester. It was revealed that three cold sprayed multiple-dimensioned cermet coatings had dense microstructure and similar phase structure with that of feedstock powder. The allotropic transformation of metal Co occurred due to its intensive plastic deformation. The coatings have no lamellar structure of conventional thermal spraying coating and the WC particles in the coatings are distributed in a size range of micrometer, submicrometer and nanometer scale. Moreover, the micro hardness and Young's modulus ofcoatings decreased, fracture toughness and wear weight loss increased with increasing binder phase content. The wear mechanism was mainly the micro-cuts effect of abrasive particle on the coating surface.

Key words: material failure and protection, cold spraying, multiple-dimensioned, WC-Co, cermet coating, microstructure, properties

中图分类号:

TG115.5

王洪涛, 陈枭, 白小波, 纪岗昌, 董增祥, 仪登亮, 杨凤根. 冷喷多尺度 WC-Co 金属陶瓷涂层结构与性能研究[J]. 兵工学报, 2013, 34(7): 876-882.

WANG Hong-tao, CHEN Xiao, BAI Xiao-bo, JI Gang-chang, DONG Zen-xiang, YI Deng-liang, YANG Fen-geng. Research on the Microstructure and Properties of Multiple-dimensioned Cold Sprayed WC-Co Cermet Coatings[J]. Acta Armamentarii, 2013, 34(7): 876-882.

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冷喷多尺度 WC-Co 金属陶瓷涂层结构与性能研究

Research on the Microstructure and Properties of Multiple-dimensioned Cold Sprayed WC-Co Cermet Coatings

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