Sn含量对Zr-Sn-Nb-Fe-Cr合金相变温度和沉淀析出相的影响  

Effect of Sn Content on Phase Transformation Temperature and Precipitation of Zr-Sn-Nb-Fe-Cr Zirconium Alloy

作　　者：栾佰峰[1] 苏婧[1] 黄天林[1] 周军[2] 张喜燕[1] 刘庆[1] 

机构地区：[1]重庆大学,重庆400044 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2012年第5期830-834,共5页Rare Metal Materials and Engineering

基　　金：中央高校基本科研业务费(CDJZR10130008);重庆大学第五届大学生创新基金项目

摘　　要：以Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cr与Zr-0.8Sn-0.3Nb-0.3Fe-0.1Cr2种不同Sn含量锆合金为研究对象,采用差示扫描量热法(DSC)测量2种锆合金的相变温度,探讨Sn含量变化对锆合金相变点的影响。同时,采用SEM对热轧态、热轧退火态、冷轧态、冷轧退火态、终轧态、终轧退火态6种加工工序样品分别进行详细的微观组织观察,随后通过定量金相法对2种锆合金在不同加工工序下的第二相大小及分布等特点进行对比分析,得出2种锆合金定量的统计结果。降低Sn含量对α→β相变点有明显影响,而沉淀析出相的颗粒形状基本不变,但是第二相颗粒平均尺寸减小。扫描电镜的能谱(EDS)分析半定量地说明Sn在锆合金中存在不同程度的成分偏析。The precipitates and phase the transformation temperatures of both zirconium alloys,Zr-1Sn-0.3Nb-0.3Fe-0.1Cr alloy and Zr-0.8Sn-0.3Nb-0.3Fe-0.1Cr alloy were investigated.The temperatures of the phase transformation of both zirconium alloys were measured by Differential Scanning Calorimetric(DSC).The effect of Sn content on the phase transformation temperature was studied.The microstructures of the alloy specimens as 6 processed states(as hot rolled state,as hot rolled+annealed state,as cold rolled state,as cold rolled+annealed state,as final rolled state,and as final rolled+annealed state) were observed carefully by SEM,Then the sizes and the volume fractions and their distributions of the second precipitated phase in the alloys were analyzed and calculated by quantitative metallography and Energy Dispersive Spectrum(EDS).The results show that the decrease of Sn content has a obvious influence on the phase trasformation temperature of α→β,and very little effect on the spape and the structure of the precipitated particles,but their average sizes will be reduced.EDS results show that the segregation of Sn content exists in the Zr alloy to some extent.

关 键 词：锆合金 相变温度 定量金相 沉淀析出 

分 类 号：TG146.414[一般工业技术—材料科学与工程]