(1. 中北大學 材料科學與工程學院，太原 030051;
2. 上海大學 機械與自動化學院，上海 200436)
摘 要: 制備一種用于激光燒結成形的包覆不銹鋼粉末。應用數值模擬預測結合實際測量方法，研究激光功率、激光束掃描速度、預熱溫度及鋪粉密度等參數對激光燒結深度的影響。結果表明，隨著預熱溫度、鋪粉密度與激光功率增加，燒結深度增加；隨著掃描速度增加，燒結深度降低。但當掃描速度不超過2 mm/s 時，燒結深度隨掃描速度的增加反而增大。提出一種利用數值模擬預測結果進行激光燒結工藝參數選擇的方法。
關鍵字: 包覆1Cr18Ni9Ti粉末；選擇性激光燒結；燒結深度；數值模擬
coated stainless steel powder
（1. School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;
2. School of Mechanical and Automation, Shanghai University 200436, China）
Abstract:A type of polymer-coated stainless steel powder used in selective laser sintering technology was prepared. The effects of laser power, scanning velocity, preheating temperature and powder spreading density on sintering depth were studied, by the using of numerical simulation and practical measurement method. The results show that the sintering depth increases with the enhancement of preheating temperature, powder spreading density and laser power. The sintering depth decreases with the increase of scanning velocity. When the scanning velocity is less than 2mm/s, the sintering depth increases with the decrease of scanning velocity. How to select laser-sintering parameters of polymer-coated stainless steel powder was discussed based on the numerical simulation results.
Key words: polymer-coated 1Cr18Ni9Ti powder; selective laser sintering; sintering depth; numerical simulation
