中国激光, 2016, 43 (7): 0702004, 网络出版: 2016-07-13   

基于粉末特性的选区激光熔化Ti6Al4V表面粗糙度研究 下载: 515次

Study on Surface Roughness of Selective Laser Melting Ti6Al4V Based on Powder Characteristics
作者单位
1 华南农业大学工程学院, 广东 广州 510642
2 华南理工大学机械与汽车工程学院, 广东 广州 510640
摘要
采用最小二乘中线法建立基于成型粉末物性的表面粗糙度计算模型;选用选区激光熔化成型Ti6Al4V单熔道和零件,用表面粗糙度仪检测成型零件的表面粗糙度,光学显微镜观察、检测成型单熔道几何尺寸,分析所建模型理论值与实验值产生误差的原因。实验结果表明:激光重熔区对表面粗糙度计算模型精度影响较大,模型理论值与实验值的平均相对误差为5.7%,误差较小,模型具有实际工程应用价值。成型零件主要由α和β相组成,显微硬度为487.3 HV0.3。
Abstract
The surface roughness calculation model based on powder properties is established by using the least square mean line method. Selective laser is used to melt molded Ti6Al4V single track and parts. The surface roughness of molded parts is detected by surface profiler and the geometric size of molded single track is observed and measured with optical microscope. The cause of errors between the theoretical and experimental value of the built model is analyzed. The experimental results show that the laser remelting zone has a great impact on the precision of the surface roughness calculation model. The average relative error between the theoretical and experimental value is 5.7%. The error is small, and the model has a practical engineering application value. The molded parts are mainly composed of α and β phases, and the micro-hardness is 487.3 HV0.3.

孙健峰, 杨永强, 杨洲. 基于粉末特性的选区激光熔化Ti6Al4V表面粗糙度研究[J]. 中国激光, 2016, 43(7): 0702004. Sun Jianfeng, Yang Yongqiang, Yang Zhou. Study on Surface Roughness of Selective Laser Melting Ti6Al4V Based on Powder Characteristics[J]. Chinese Journal of Lasers, 2016, 43(7): 0702004.

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