TiC的添加对Mo-Ti合金性能与组织结构的影响  

Influence of TiC Addition on Properties and Microstructure of Mo-Ti Alloy

作　　者：卢明园[1] 范景莲[1] 成会朝[1] 廖跃辉[1] 田家敏[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《稀有金属材料与工程》2010年第6期985-988,共4页Rare Metal Materials and Engineering

基　　金：中南大学博士点基金(20090162110032);国家杰出青年科学基金(50925416)

摘　　要：采用粉末冶金法,通过在金属Mo中添加TiH2粉末及超细TiC粉末制备Mo-Ti-TiC合金,研究TiC的添加对Mo-Ti合金的拉伸性能和显微组织的影响。结果表明,TiC的添加使Mo-Ti合金的拉伸强度得到有效提高。TiC添加量在0.05%(质量分数)时,合金拉伸强度最高,强度较Mo-Ti合金提高了31.7%。TiC的添加保护了基体中由TiH2颗粒分解脱氢所形成的单质Ti颗粒,降低其氧化程度。添加TiC后,合金内部生成含元素Mo、Ti、O和C的第二相粒子,有效阻止合金晶粒长大,因此,随着合金中TiC含量的增加,合金的晶粒尺寸减小。Mo-Ti-TiC alloys were fabricated by powder metallurgy process through adding TiH2 powder and ultrafine TiC powder into Mo metal. The influence of the addition of nano-scale TiC particles on the microstructure and tensile properties of Mo-Ti alloy was studied. The results indicate that the tensile strength of Mo-Ti alloy was effectively increased by TiC particles addition. Mo-Ti with 0.05wt% TiC exhibited the highest tensile strength, which is 31.7% higher than that of Mo-Ti alloy. The addition of TiC protects Ti from oxidation, which is produced by decomposition and dehydrogenization of TiH2 particles. The second phase particles containing Mo, Ti, O and C in the alloy were formed with TiC addition. The grain size of the alloy decreased with the increase of the TiC content since the second phase particles can inhibit the grain growth

关 键 词：Mo-Ti-TiC合金 拉伸性能 相对密度 晶粒度 组织结构 

分 类 号：TG146.412[一般工业技术—材料科学与工程]