Quality Optimization of Plasma Sprayed Ni60CuMo Coating Based on Response Surface Method
CHU Jiajie1, HAN Bingyuan1,2,*, LI Renxing1, GAO Xianghan1, CONG Mengqi1, WU Haidong1, XU Wenwen1, DU Wei1
1 School of Automotive and Traffic Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China 2 National Key Lab for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, China
Abstract: The use of surface engineering technology to remanufacture the waste aluminum alloy piston can effectively prolong the service life of the aluminum alloy piston, and at the same time realize the saving of resources and the reduction of environmental pollution. For this purpose, the Ni60CuMo coating was prepared on the surface of aluminum alloy 109 (ZL109) by plasma spraying technology, and a Box-Behnken design regression analysis experiments combined with response surface method. Taking the porosity of the coating under different process conditions as the response value, the effects of the three factors of spraying distance (D), powder feeding rate (R) and spraying power (P1) on the coating porosity (P) was analyzed. The results show that the powder feeding rate has the greatest influence on the porosity, and the coating quality is better with fewer pores and cracks at lower powder feeding rate, larger spraying distance and smaller spraying power. And the established porosity response surface model is effective and can be used for quality optimization of plasma sprayed Ni60CuMo coatings. The prediction parameters of the minimum porosity are:spraying distance D=131.58 mm, powder feeding rate R=37.01 g·min-1 and spraying power P1=31.09 kW, the minimum porosity that can be obtained 2.5%.
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2024, Vol. 38 
