選択的レーザ焼結間接法で作製したステンレス鋼粉末成形体への銅合金溶浸

摘要

近年，“ものづくり”のデザインや設計段階でデジタル情rn報を用いる3次元デジタルシステムが導入されるとともrnに，試作段階や製造段階においても迅速作製技術が適用されrnている．一般にその造形手法は光造形法，粒子堆積法，シーrnト堆積法，粉末結合法などがある．これまで，造形可能なrn材料は樹脂や紙などに限られてきたが，最近では金属での造rn形も可能となってきている．%The infiltration process of Cu-Sn alloy into indirect selective laser sintered (SLS) stainless steel preforms was investigated. The heating rate for the infiltration process was 0.17 K/s and the holding temperature was varied from 1293 to 1473 K for 3.6 ks. The process was carried out in an inert gas atmosphere. Although the volume of the preforms without infiltration decreased with increasing sintering temperature, the volume of the infiltrated parts remained constant at approximately -5%. The stainless steel particles were coarsened by the increasing holding temperature during infiltration; however, the area ratio of stainless steel particles remained constant at approximately 60% regardless of the holding temperature. The tensile strength and elongation of the infiltrated parts were approximately 540 Mpa and 10%, respectively, regardless of the holding temperature.