启闭机活塞杆表面爆炸喷涂制备Al<sub>2</sub>O<sub>3</sub>涂层的显微组织与性能

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摘要采用新型的CCDS2000型爆炸喷涂系统在启闭机活塞杆常用不锈钢40Cr表面制备由WC-12Co粘结层和Al₂O₃面层构成的复合涂层,对涂层的微观组织结构、显微硬度、孔隙率、结合强度、抗冲击韧性、抗腐蚀性能与耐磨性能等进行分析与测试,并阐述涂层的摩擦磨损机理。结果表明：Al₂O₃涂层的孔隙率为0.94%,硬度(HV_0.2)在1108~1316之间,结合强度达到59.4MPa。涂层的抗腐蚀性能和抗磨损性能都明显优于40Cr不锈钢,抗冲击韧性略有提高。40Cr不锈钢的平均质量磨损量是99.56mg,为Al₂O₃涂层质量磨损量的24.5倍。Al₂O₃涂层的磨损机理主要是显微犁削和黏着磨损。

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	伏利
	陈小明
	毛鹏展
	刘伟
	张磊
	张凯
	李育洛

关键词 ：爆炸喷涂, 40Cr不锈钢, 活塞杆, Al₂O₃涂层, 冲击韧性, 摩擦磨损

Abstract：A composite coating composed of WC-12Co adhesive layer and Al₂O₃ surface layer was prepared on 40Cr stainless steel surface of hoist piston rod by new type CCDS2000 explosive spraying technology. The microstructure, microhardness, porosity, bonding strength, impact toughness, corrosion resistance and wear resistance of the coating were analyzed and tested. The friction and wear mechanism of the coating was also analyzed. The results show that the porosity of the Al₂O₃ coating is 0.94%. The hardness is in the range of 1 108-1 316 HV_0.2. The bonding strength can reachs to 59.4 MPa. The corrosion resistance and wear resistance of the coating are obviously better than that of 40Cr stainless steel, and the impact toughness is slightly improved. The average mass wear loss of 40Cr stainless steel is 99.56 mg, which is 24.5 times of that of Al₂O₃ coating. The wear mechanism of Al₂O₃ coating is mainly micro ploughing and adhesive wear.

Key words： explosive spraying 40Cr stainless steel piston rod Al₂O₃ coating impact toughness friction and wear

收稿日期: 2020-06-09 出版日期: 2021-01-18

ZTFLH:

TG147

基金资助:浙江省科技计划资助项目(2018C37029,2019C04019,GC19E090001)

通讯作者: 陈小明,博士研究生。电话：0571-88082819;E-mail: xiaoming840@163.com

引用本文:

伏利, 陈小明, 毛鹏展, 刘伟, 张磊, 张凯, 李育洛. 启闭机活塞杆表面爆炸喷涂制备Al₂O₃涂层的显微组织与性能[J]. 粉末冶金材料科学与工程, 2020, 25(5): 410-416.
FU Li, CHEN Xiaoming, MAO Pengzhan, LIU Wei, ZHANG Lei, ZHANG Kai, LI Yuluo. Microstructure and properties of Al₂O₃ coating on the surface of hoist piston rod prepared by explosive spraying. Materials Science and Engineering of Powder Metallurgy, 2020, 25(5): 410-416.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2020/V25/I5/410

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