56NiCrMoV7钢激光熔覆Ni60合金涂层的质量预测与性能分析

doi:10.19976/j.cnki.43-1448/TF.2024053

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Abstract Theoretical and experimental studies on laser cladding of Ni60 alloy powders on 56NiCrMoV7 steel surface were carried out based on response surface method. The laser power, scanning speed, powder feed rate, and overlap rate were taken as the influencing factors, and the multiple regression prediction model was established using the coating surface smoothness, dilution rate, and microhardness as the response targets to optimize the process parameters and predict the coating quality. The results show that the interaction of powder feed rate and scanning speed has the greatest influence on the surface smoothness; the laser power, powder feed rate, and overlap rate have a significant influence on the dilution rate; the powder feed rate has the greatest impact on the microhardness, followed by the laser power. The optimized process parameters are laser power of 1 647 W, powder feed rate of 0.5 rad/min, scanning speed of 5 mm/s, and overlap rate of 0.4, and the predicted values of surface flatness, dilution rate, and microhardness of Ni60 alloy coatings are in good agreement with the experimental values. The metallurgical bonding of Ni60 alloy coating and 56NiCrMoV7 substrate is good, and the hardness and abrasion resistance of the coating are superior to those of substrate, the surface strengthening effect is obvious.

Key words： laser cladding Ni60 alloy response surface method process parameter microhardness

Received: 21 May 2024 Published: 30 September 2024

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	LIU Lilan
	YANG Fan
	DOU Weitao
	ZHANG Jianguang
	HAN Feiyan

Cite this article:

LIU Lilan,YANG Fan,DOU Weitao, et al. Quality prediction and performance analysis of laser cladding Ni60 alloy coating on 56NiCrMoV7 steel[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(4): 263-274.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024053 OR http://pmbjb.csu.edu.cn/EN/Y2024/V29/I4/263

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