SLS成型参数对PA2200拉伸试样强度和尺寸精度的影响  

Influence of SLS Forming Parameters on Strength and Dimension Accuracy of PA2200 Tensile Specimens

作　　者：侯高雁 郝志强[2] 段现银 HOU Gaoyan;HAO Zhiqiang;DUAN Xianyin(School of Electrical and Mechanical Engineering,Wuhan Polytechnic College,Wuhan 430081,China;Key Laboratory of Metallurgical Equipment and Control Technology,Wuhan University of Science and Technology,Ministry of Education,Wuhan 430081,China)

机构地区：[1]武汉职业技术学院机电工程学院,湖北武汉430081 [2]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081

出　　处：《铸造技术》2022年第1期66-68,共3页Foundry Technology

基　　金：国家自然科学基金资助项目(51875379);湖北省教育厅科学研究计划指导性项目(B2020384)。

摘　　要：选择性激光烧结(SLS)成形工艺参数对成形件力学性能和尺寸精度有很大影响,不同的成形材料需要不同的工艺参数组合;然而,对于PA材料尚缺成形参数标准。为了解决这个问题,选用PA2200粉末材料,研究了激光功率和扫描速率对成形件拉伸强度和尺寸的影响。结果表明,以拉伸强度和尺寸精度为参考指标,结合理论分析与实验验证,最优参数为:激光功率40 W,扫描速率4000 mm/s。以此参数的PA2200成形件拉伸强度可达44.48 MPa,尺寸精度X向、Y向和Z向相对偏差分别为-0.41%、-0.40%和0.50%。The forming parameters of selective laser sintering(SLS)have great influence on the mechanical properties and dimensional accuracy of forming parts,and different forming materials need different process parameters combination.However,there is no standard of forming parameters for PA materials.In order to solve this problem,the influence of laser power and scanning rate on tensile strength and size of forming parts was studied by using PA2200 powder material.The results show that the optimal parameters are as follows:laser power 40 W,scanning rate 4000 mm/s,taking tensile strength and dimensional accuracy as reference indexes,combined with theoretical analysis and experimental verification.With this parameter,the tensile strength of PA2200 can reach 44.48 MPa,and the relative deviations of dimension accuracy in X,Y and Z directions are-0.41%,-0.40%and 0.50%,respectively.

关 键 词：SLS 激光功率 扫描速率 拉伸强度 尺寸精度 

分 类 号：TQ322.3[化学工程—合成树脂塑料工业]