Effect of Post-annealing on the Microstructure and Mechanical Properties of Cold-sprayed Zn-Al Coatings
A compact Zn-Al coating was successfully deposited by cold spraying technique.The effect of annealing temperature on the microstructure,microhardness and wear properties of the coatings was explored.The typical morphology of as-sprayed coating was characterized as intensively deformed particles with elongated shape.After annealing treatment,more homogeneous microstructure was achieved at 250°C while an eutectoid lamellar structure started to form when annealing temperature was over 300°C.An obvious anneal-hardening effect was observed especially at the annealing temperature range of 200 to 350°C.The wear resistance of annealed coatings showed an opposite trend with the variation of their microhardness.The lowest friction coefficient was obtained after annealed at 250~300°C.Generally,The best wear properties with both relatively small weight loss rate and friction coefficient were achieved after annealing at 250°C for 120 min.
cold spray Zn-Al coating microstructures hardness wear properties
Liang Yongli Zhang Junbao Yang Xiaoping
University of Science and Technology of China,Hefei 230026,China;Advanced Technology Division,Resear Advanced Technology Division,Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China
国内会议
上海
英文
1-7
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）