Zr-Nb-Cu合金连续升温相转变动力学研究  

Continuous Heating Phase Transformation Kinetics of Zr-Nb-Cu Alloy

作　　者：王荣山[1] 柏广海[1,2] 刘二伟[1] 张晏玮[1] 梅金娜[1] 杜晨曦[1] 李金山[2] 薛祥义[2] Wang Rongshan Bai Guanghai Liu Erwei Zhang Yanwei Mei Jinna Du Chenxi Li Jinshan Xue Xiangyi(Suzhou Nuclear Power Research Institute, Suzhou 215004, China State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2016年第11期2857-2860,共4页Rare Metal Materials and Engineering

基　　金：中广核工程有限公司资助项目(GNDBDC00426);国家高科技研究发展计划("863"计划)(2008AA031701);苏州热工研究院有限公司2012年博士后基金资助项目

摘　　要：采用热膨胀法对Zr-1Nb-0.01Cu合金在不同升温速率下α_(Zr)→α_(Zr)+β_(Zr)相转变动力学进行了研究。结果表明,α_(Zr)→α_(Zr)+β_(Zr)相转变起始温度与升温速率之间的关系为:Tα→α+β=744.4+9.4ln(R H),升温速率对合金相转变温度的影响要小于E110合金;结合JMA方程计算得到α_(Zr)→α_(Zr)+β_(Zr)相转变的激活能为149.1 kJ/mol,低于Zr-4和M5合金的相转变激活能。根据合金相转变动力学曲线,给出了合金连续升温过程α_(Zr)→α_(Zr)+β_(Zr)相转变的CHT连续升温相转变图。αZr→αZr＋βZr phase transformation kinetics were investigated by the thermodilatometry at various heating rates in Zr-1Nb-0.01 Cu alloy. The results show that the relationship between the start transformation temperature of αZr→αZr＋βZr and the heating rates is Tα→α＋β=744.4＋9.4ln（R H）, and the heating rates show a weaker effect on the transformation temperatures of the alloy than on that of E110 alloy. The active energy of αZr→αZr＋βZr is 149.1 k J/mol calculated from the JMA model, smaller than that of Zr-4 and M5 alloys. The continuous heating transformation diagram（CHT） of αZr→αZr＋βZr is given according to phase transformation curves of the alloy.

关 键 词：Zr-1Nb-0.01Cu合金 αZr→αZr+βZr 动力学 激活能 CHT图 

分 类 号：TG146.414[一般工业技术—材料科学与工程]