粉末冶金Ti-Fe合金的显微组织及力学性能  

Microstructure and mechanical properties of powder metallurgy Ti-Fe alloys

作　　者：孟庆宇[1] 路新[2] 徐伟[2] 支玲玲[2] 陈骏[1] 曲选辉[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《材料热处理学报》2016年第8期36-40,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51204015);高等学校博士学科点专项科研基金(20110006120023)

摘　　要：以元素粉末为原料,采用模压烧结技术制备了Ti-（2-20）Fe合金（Fe分别为2%、5%、10%、15%和20%）,探讨了烧结工艺及Fe含量对合金组织和力学性能的影响规律。结果表明,在1100-1300℃烧结温度内可制备出组织成分均匀、高致密度（约为98%）的Ti-Fe合金材料。随Fe元素含量的提高,合金的烧结致密化温度明显降低,制备合金的晶粒尺寸减小,α层片体积含量降低并逐渐细化。当Fe含量为20%时,合金由单一β相晶粒构成。在1150℃烧结制备的Ti-15Fe合金相对具有最优的综合性能,其硬度为43.9 HRC,弹性模量为64.6 GPa,抗压强度为2702 MPa,压缩率为32.7%。Ti-（2-20） Fe alloys（with 2% 、5% 、10% 、15% or 20% Fe） were fabricated by powder metallurgy technique using elemental powders as raw materials.The effects of sintering temperature and Fe content on microstructure and mechanical properties of the alloys were studied.The results show that the Ti-x Fe alloys with high-density（about 98%） and uniform microstructure can be produced at the sintering temperature range of 1100-1300 ℃.With the increasing of Fe content,the sintering temperature for densification significantly decreases,while the grain size of β phase decreases and the α lamellars become less and thinner.As Fe content is up to 20%,the alloy samples consist of single β grains.In comparison,the Ti-15 Fe alloy sintered at 1150 ℃ exhibits the superior mechanical properties with hardness of 43.9 HRC,elastic modulus of 64.6 GPa,compressive strength of 2702 MPa,and compression rate of 32.7%.

关 键 词：Ti-Fe二元合金 粉末冶金 弹性模量 显微组织 

分 类 号：TG146.23[一般工业技术—材料科学与工程]