Research on Process Parameters of Electron Beam Rapid Prototyping for Titanium Alloy
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摘要: 采用不同的工艺参数对TC18钛合金板材电子束快速成型进行研究,测试、分析其力学、抗高温氧化和耐腐蚀性能。结果表明:除扫描时间外,束流、聚焦电流、加速电压和每层金属粉厚度均对TC18钛合金的力学、抗高温氧化和耐腐蚀性能都产生重要影响。束流从3 mA增加至9 mA或聚焦电流从550 mA增加至650 mA或每层金属粉厚度从0.2 mm增加至1.0 mm,电子束快速成型TC18钛合金板材的抗拉强度和冲击韧性均呈现出先增大后减小的趋势。主要工艺参数优选为:束流6 mA、聚焦电流600 mA、扫描时间2 s、加速电压55 kV、每层金属粉厚度0.6 mm。Abstract: This paper applied different process parameters for the study of electron beam rapid prototyping TC18 titanium alloy sheet and carried out the testing and comparative analysis of mechanical properties,high temperature oxidation resistance and corrosion resistance for the alloy.The results show that,except for the scanning time,the factors of beam current,focusing current,accelerating voltage and the thickness of each metal powder layer have major impacts on the mechanical properties,high temperature oxidation resistance and corrosion resistance of the TC18 titanium alloy.Both the tensile strength and impact ductility of TC18 titanium alloy increase and then decrease with the enhancement of any one of the three parameters:beam current from 3 mA to 9 mA,focusing current from 550 mA to 650 mA,thickness of each metal powder layer from 0.2 mm to 1.0 mm.The optimal process parameters are the beam current of 6 mA,focusing current of 600 mA,scanning time of 2 s,accelerating voltage of 55 kV and the thickness of each metal powder layer of 0.6 mm.
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Key words:
- titanium alloy /
- electron beam rapid prototyping /
- scanning time /
- mechanical properties
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