采用直接金属激光烧结的方法,对316不锈钢粉末进行了一系列烧结实验.实验发现,在液相粘度较高、表面张力大,熔体材料不浸润固相颗粒和基板等因素的影响下,烧结过程中出现了球化现象.球化的出现妨碍了直接金属激光烧结成形的顺利进行.分析了316不锈钢粉末球化效应产生的原因,讨论了工艺参数(激光功率、扫描速度和粉层厚度)对316不锈钢金属粉末烧结成形的影响.研究表明,适当提高扫描速度或减小激光功率可以在一定程度上减小316不锈钢粉末激光烧结的球化效应.
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