Research on Process Parameters of Laser Solid-formed 30CrNi2MoVA Steel Based on the Size Prediction

doi:10.3969/j.issn.1000-1093.2020.02.021

Abstract

Abstract: 30CrNi2MoVA steel is widely used in the ordnance equipment manufacturing industry, we have researched the laser solid forming (LSF) technology with this material. The influence of main process parameters on the sizes of deposed layers is analyzed by using regression orthogonal design method through the real-time monitoring of molten bath. The main influence factors and size values of deposed layers, and the regression equation are achieved. Spot diameter, laser power and scanning velocity have obvious effects on the deposed layer width. The width of deposed layer is positively correlated with spot diameter and laser power, but it's negatively correlated with scanning velocity. The height of deposed layer is obviously affected by scanning velocity and powder feed rate. The height of deposed layer is positively correlated with powder feed rate, but it's negatively correlated with scanning velocity. Experimental results show that the forming dimension prediction model is used to accurately predict the forming size value. The select range of process parameters range of LSF 30CrNi2MoVA steel is determined from the aspect ratio of deposed layer. When the spot diameter is 3.5 mm, the laser power should be 1 300-3 000 W, the powder feed rate should be 0.7- 2.5 r/min, and the scanning velocity should be 5-12 mm/s. Key

Key words: 30CrNi2MoVAsteel, sizeprediction, lasersolidforming, orthogonaldesign, processparameter

CLC Number:

TG665

ZHANG Zhen， WANG Min， FAN Huaxian， LIU Guangzhi. Research on Process Parameters of Laser Solid-formed 30CrNi2MoVA Steel Based on the Size Prediction[J]. Acta Armamentarii, 2020, 41(2): 381-387.

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第41卷
第2期2020 年2月兵工学报ACTA
ARMAMENTARIIVol.41No.2Feb.2020

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