钛合金中TiC在高温处理过程中形态变化机制  

Morphology variety mechanism of TiC in Ti alloy by high temperature heat treatment

作　　者：金云学[1] 曾松岩[2] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《材料科学与工艺》2007年第4期548-552,共5页Materials Science and Technology

基　　金：黑龙江省普通高校骨干教师创新能力量资助项目(1053G041)

摘　　要：钛合金中的TiC颗粒形态复杂,尺寸大,不利于合金性能的提高.适当的高温处理工艺可改变TiC/Ti合金中TiC形态和尺寸,本文对不同成分合金在不同高温处理条件下的形态变化规律的详细研究结果表明,当高温处理温度及碳元素在基体中的固溶度不同时,TiC形态变化机制也不相同,因此总结分析的基础上提出两种TiC形态变化机制,即溶解-析出机制和溶解-固溶-脱溶机制,并理论上详细研究和分析了各种机制下,TiC形态、尺寸变化的原因及机理.Morphology of TiC particle in Ti alloy is complex, and size of TiC particle is big, which It is no good to increase performance of TiCp/Ti composite. Adequate high temperature heat - treatment can change morphology and size of TiC in TiC/Ti composite. Morphology variety rules were investigated particularly in different composition alloy by different high temperature heat - treatment condition. The results show that morphology variety rules of TiC are different by different high temperature and different solid solubility of C element in matrix. Two morphology variety rules are put forward based on analysis, namely dissolving -precipitation mechanism and dissolving - solution - precipitation. Reason and mechanism of morphology and size variety of TiC are investigated in theory with different mechanism.

关 键 词：钛合金 复合材料 TIC 热处理 形态 

分 类 号：TG146.2[一般工业技术—材料科学与工程] V257[金属学及工艺—金属材料]