爆炸喷涂制备流体机械抗冲蚀涂层的性能

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摘要采用CCDS2000型爆炸喷涂技术,在水泵和水轮机等流体机械常用不锈钢0Cr13Ni5Mo上制备WC-12Co涂层。采用金相显微镜、显微硬度仪、SEM、XRD、电子拉伸试验机、冲蚀试验机等测试分析手段和研究涂层的微观组织、显微硬度、孔隙率、结合强度、抗冲蚀性能等,并分析涂层的抗冲蚀机理。结果表明：制备的WC-12Co涂层的孔隙率为0.63%,硬度为1 305.6 HV_0.2,涂层与基体的结合强度达到130 MPa。此外涂层抗冲蚀性为基材G0Cr13Ni5Mo不锈钢的4.76倍。冲蚀后涂层内部裂纹主要以穿晶断裂、沿晶断裂形式扩展。因此利用爆炸喷涂制备WC-12Co涂层在高含沙水流的流体机械零部件上有广泛的应用前景。

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	伏利
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关键词 ：爆炸喷涂, 流体机械, 结合强度, 冲蚀, 穿晶断裂, 沿晶断裂

Abstract：The WC-12Co coating was prepared by CCDS2000 explosive spraying technology on the stainless steel 0Cr13Ni5Mo, which is commonly used in fluid machinery such as pumps and turbines. The microstructure, micro hardness, porosity, bonding strength and erosion resistance of the coating were characterized and analyzed by optical microscopy, hardness tester, SEM, XRD, tensile testing machine and slurry erosion wear testing machine, and the erosion mechanism of the coating was also analyzed. The results show that the porosity of the WC-12Co coating is 0.63%, the micro hardness is 1 305.6 HV_0.2 and the bonding strength is 130 MPa. Additionally, the coating erosion resistance is 4.678 times than that of ZG0Cr13Ni5Mo stainless steel. The internal crack of the coating mainly expands along the transgranular fracture and crystal fracture. Therefore, the use of explosive spray to prepare WC-12Co coating has broad application prospects in fluid mechanical parts with high sediment flow.

Key words： explosive spraying fluid machinery bonding strength erosion transgranular fracture crystalline fracture

收稿日期: 2018-08-03 出版日期: 2019-07-12

ZTFLH:

TG174

基金资助:浙江省公益性项目(2018C37029); 浙江省公益性项目(2017C37048); 杭州市社会发展科研攻关项目(161323Z006)

通讯作者: 陈小明,高级工程师。电话：0571-88082819;E-mail: xiaoming840@163.com

引用本文:

伏利, 陈小明, 马红海, 刘伟, 孟金博. 爆炸喷涂制备流体机械抗冲蚀涂层的性能[J]. 粉末冶金材料科学与工程, 2019, 24(1): 75-79.
FU Li, CHEN Xiaoming, MA Honghai, LIU Wei, MENG Jinbo. Performance of anti-erosion coating sprayed by explosive spraying on fluid machinery. Materials Science and Engineering of Powder Metallurgy, 2019, 24(1): 75-79.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2019/V24/I1/75

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