316L不锈钢粉末注射成形专用料的烧结机理及性能  

Sintering Mechanism and Performance of 316L Stainless Steel Powder Injection Molding Feedstock

作　　者：黄仁军 王华琴 成骏峰 HUANG Renjun;WANG Huaqin;CHENG Junfeng(Suzhou Rongchang Composite Materials Co.,Ltd.,Suzhou 215134,China;School of Material Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]苏州荣昌复合材料有限公司,江苏苏州215134 [2]常州大学材料科学与工程学院,江苏常州213164

出　　处：《热加工工艺》2020年第20期51-55,共5页Hot Working Technology

基　　金：江苏省科技厅产学研前瞻项目(BY2016029-21)。

摘　　要：通过研究316L不锈钢粉末注射成形烧结坯的烧结机理,评价了金属粉末注射成形专用料的性能。结果表明:316L不锈钢粉末在1100℃时出现烧结颈,粉末开始预烧结;较高的粉末填充量能提高烧结坯的抗拉强度,降低尺寸收缩率;烧结坯的断裂呈韧性断裂,拉伸断口出现较多的韧窝;提高烧结温度可使得烧结坯更致密,烧结温度为1360℃时,烧结坯的密度达到理论密度的96.3%;烧结坯表面孔隙数量随着烧结温度的提高而减少,晶界更加明显。The properties of powder injection molding feedstock were evaluated in terms of the study of the performance of 316 L stainless steel injection molding sintered billets. The results show that as the temperature increases to 1100 ℃, the sintering neck begins to appear and the presintering of the powder appears. The higher powder powder filling energy can increase the tensile strength of the sintering billets and reduce the shrinkage percentage. The sintering billet exhibits ductile fracture behavior and more dimples appear on the tensile fracture surfaces. The increase of the sintering temperature can lead to a higher packing density of the sintered billets. The density of the sintered billets reaches 96.3% of the theoretical density when the sintering temperature is 1360 ℃. With the sintering temperature increasing, the number of the pores on the sintered billet surface decreases, and then the grain boundary is more obvious.

关 键 词：316L 烧结 拉伸性能 收缩率 形貌 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TF124[金属学及工艺—金属材料]