一种低成本钛合金相变点的测定方法  

Determination Method of Phase Transformation Point of a Kind of Low-cost Titanium Alloy

作　　者：周建荣 刘润芳 杨益军 康凤[3] 林军[3] ZHOU Jian-rong;LIU Run-fang;YANG Yi-jun;KANG Feng;LIN Jun(Shanxi Diesel Engine Industry Co.,Ltd.,Datong 037036,China;Beijing Xinfeng Machinery Factory,Beijing 100074,China;No.59 Research Institute of China Ordnance Industry,Chongqing 400039,China)

机构地区：[1]山西柴油机工业有限公司,山西大同037036 [2]北京航天新风机械设备有限责任公司,北京100074 [3]中国兵器工业第五九研究所,重庆400039

出　　处：《精密成形工程》2020年第2期127-130,共4页Journal of Netshape Forming Engineering

摘　　要：目的获得一种低成本钛合金Ti12LC准确的相变点。方法采用差热分析法和连续升温金相法,对钛合金的相变温度进行了测定。首先通过差热分析,初步确定了该钛合金相变温度范围,接着采用连续升温金相法,进一步精确分析钛合金的相变点。通过分析DSC曲线中的吸热、放热现象,对该合金的相变温度范围进行研究,再通过试样淬火后的金相分析,研究α相和β相的数量及分布。结果确定了Ti12LC钛合金的相变温度在880~890℃之间,而连续升温淬火金相法测得Ti12LC钛合金的相变温度为885℃。结论由于淬火温度间隔小,两种分析方法下,该相变温度的测定较为准确。The work aims to obtain the phase transformation point of a low-cost titanium alloy Ti12LC accurately.The DTA method and metallographic observation method were used to measure the phase transformation temperature of the titanium alloy.Firstly,the temperature range of phase transformation of the titanium alloy was initially determined by the DTA method,and then the transformation point of the titanium alloy was further accurately analyzed by metallographic observation method.The transformation temperature range of the alloy was studied by analyzing the endothermic and exothermic phenomena in DSC curve,and then the quantity and distribution ofαphases andβphases were studied by metallographic analysis after quenching.It was found that the phase transformation temperature of Ti12LC alloy was between 880℃and 890℃,while the phase transformation temperature of Ti12LC alloy measured by metallographic observation method was 885℃.It turns out that the phase transformation temperature analyzed by two methods is more accurate because of the small temperature interval.

关 键 词：Ti12LC钛合金 相变点 Α相 Β相 

分 类 号：TG146.1[一般工业技术—材料科学与工程]