【摘 要】
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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.T
【机 构】
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University of Science and Technology of China,Hefei 230026,China;Advanced Technology Division,Resear
【出 处】
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第十届中国钢铁年会暨第六届宝钢学术年会
论文部分内容阅读
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.
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