为了研究激光能量密度对尼龙12/高密度聚乙烯(HDPE)制品尺寸的影响，基于选择性激光烧结快速成型技术，利用CO2激光对尼龙12/HDPE粉体材料进行了激光烧结成型试验，并用扫描电镜分析了烧结层中尼龙12/HDPE的显微组织。结果表明，随着激光功率/扫描速率(P/v)的增加，烧结件的翘曲量逐渐增大；较佳的成型激光能量密度为P/v=0.8%，此时的翘曲量约为0.4mm。该结果对复合尼龙粉末的激光烧结的研究是有帮助的。

In order to discuss the effect of laser energy density on the dimension of nylon12/HDPE (high density polyethylene) product, experiments of sintering nylon12/HDPE were carried out with CO2 laser based on the selective laser sintering technology. The microstructure of laser-sintering nylon12/HDPE was examined by means of scanning electron microscopy. It is concluded that warping will increase with the ratio of power/velocity(P/v) increasing. Optimum laser energy density P/v=0.8% while warping is about 0.4mm. This study is helpful to sinter the composite of nylon powder.