摘要
针对复杂形状纯钛件的精密制备,采用粉末注射成形技术,设计了几种不同粉末组成,制备成催化脱脂型喂料,再经粉末注射成形,烧结成制品。系统研究了烧结工艺参数对钛烧结件致密度、碳氧含量、显微组织和力学性能的影响。结果表明:采用球形粉末和不规则粉末搭配喂料的试样综合性能较好,经1250℃真空烧结2 h后,致密度为95.7%,其C、O含量分别为0.14%和0.46%,抗弯强度为1141 MPa,720 MPa,延伸率为4.5%,晶粒细小均匀,并呈现韧性断裂特征。
For the precise preparation of pure titanium parts with complex shapes,we designed several powder composition and prepared catalytic defatted type feeding.Then we obtained sintered products by powder injection molding(PIM).We studied the influence of sintering parameters on the density,the content of carbon and oxygen,microstructure and mechanical properties.Results show that the sample from the feeding of spherical powder and irregular powder possesses better comprehensive properties after sintering at 1250 oC for 2 h in vacuum.Its carbon content and oxygen content is 0.14% and 0.46%.respectively,its bending strength 1141 MPa,tensile strength 720 MPa,and elongation 4.5%.The sample exhibits the ductile fracture characteristic,with fine and uniform grains.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第S1期104-108,共5页
Rare Metal Materials and Engineering
基金
广州市科技计划项目(201510010085)
广东省科技基础条件建设领域项目(2014B030301012)
广东省产学研合作项目(2014B090904070)
广东省省属科研机构改革创新领域(2016B070701024)
广州市创新平台建设与共享项目(201509010003)
关键词
粉末注射成形
催化脱脂
钛
烧结
密度
powder injection molding
catalytic debinding
titanium
sinter
density
