C-H化合物和高频微锻造对激光直接成形304不锈钢组织与性能的影响  

Influence of C-H compound and high-frequency micro-forging on microstructure and properties of 304 stainless steel fabricated by laser direct prototyping

作　　者：张彦[1] 邱长军[1] 刘武[1] 刘赞[1] 

机构地区：[1]南华大学机械工程学院,湖南衡阳421001

出　　处：《金属热处理》2013年第8期103-106,共4页Heat Treatment of Metals

基　　金：湖南省市联合基金重点项目(13JJ8013);湖南省重点学科建设项目(湘教发[2011]76号);湖南省高校科技创新团队支持计划(湘教通[2012]318号)

摘　　要：利用激光直接成形技术在基材上熔覆两种成分304不锈钢粉末,其中一种粉末添加C-H化合物。对成形区域的一部分进行高频微锻造处理后,将成形层与基材切开,试验测量成形层的力学性能,观察其内部缺陷的分布和微观组织形貌。结果表明,添加C-H化合物和高频微锻造处理都使成形层的内部缺陷在一定程度上得到愈合,而且抗拉强度显著提高。添加C-H化合物后,成形层的组织分布更加均匀,而微锻造处理则可以细化晶粒。Two kinds of 304 stainless steel powder（one of them added C-H compound） were coated on the substrate by laser direct prototyping technology.Part of the formed area was treated with high frequency micro-forging,and the formed layers were cutted from the substrate.Subsequently,the mechanical property,internal defect and microstructure of the layers were studied.The results show that addition of C-H compound and micro-forging can eliminate the internal defects of the layers to some extent,and significantly enhance the tensile strength.In addition,the microstructure of the layers that the cladding powder mixed with C-H compound is more uniform,while the grains are refined and harmonized with high-frequency micro-forging.

关 键 词：激光直接成形 304不锈钢 C-H化合物 高频微锻造 

分 类 号：TF12[冶金工程—粉末冶金]