近10多年来,选区激光烧结(Selective Laser Sintering,简称SLS),一种基于先进的激光技术、粉体技术和CAD技术的快速成形技术日渐成熟.与常规的粉末冶金工艺相比,SLS无需模具就可将金属和非金属粉末直接烧结成近净形致密零件,具有成形灵活性强、周期短、原料广泛等特点,并适合于制造不同材料和复杂形状的零件,在汽车、造船、机械、航空与航天等诸多领域逐渐得到广泛应用,成为当前成形技术中的一个研究热点和极具发展潜力的前沿技术.本文简要介绍了SLS技术的工作原理及工艺过程,以及近年来的研究进展和工程应用情况,并着重对比分析了SLS与常规粉末冶金技术的异同.
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