卢康明,李俊琛,赵梦雨,方政予,程煜刚

• 1:兰州理工大学材料科学与工程学院
• 2:有色金属先进加工与再利用国家重点实验室

摘要(Abstract)：

研究了选区激光熔化(SLM)430不锈钢线-面-体的成形质量与工艺参数之间的关系。设计了单熔道、多道搭接以及块体成形试验，分析了SLM过程中缺陷形成的原因，以致密度为评价指标，确定SLM430不锈钢的最佳成形参数。结果表明：高功率低扫描速度有利于获得连续均匀的单熔道形貌，当激光功率为200 W、扫描速度为800 mm/s时，熔道宽度分布均匀。多道搭接的结果显示表面粗糙度随扫描间距的增加先降低后升高，扫描间距为0.08 mm时粗糙度最小，为3.88μm,表面成形质量最佳。通过正交试验分析，发现3种因素对块体成形件相对致密度影响的显著性排序为：扫描速度>激光功率>扫描间距；相对致密度随扫描速度的增大而减小；随着激光功率和扫描间距的增加，相对致密度呈现先升高后降低的趋势；最终确定SLM 430不锈钢的最佳成形工艺参数组合为激光功率200 W、扫描速度600 mm/s、扫描间距0.08 mm,该参数下成形件相对致密度达99.56%。

关键词(KeyWords)： 430不锈钢;选区激光熔化(SLM);单熔道;多道搭接;工艺优化

Abstract:

Keywords:

基金项目(Foundation): 中央引导地方科技发展资金项目(23ZYQB300)

作者(Author): 卢康明,李俊琛,赵梦雨,方政予,程煜刚

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