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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。
Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cr and Zr-0.8Sn-0.3Nb-0.3Fe-0.1Cr two kinds of different content of zirconium alloy Zr as the research object, the use of differential scanning calorimetry Phase transition temperature of zirconium alloy to explore the influence of Sn content on the transformation temperature of zirconium alloy. At the same time, the microstructure of six kinds of processing samples including hot rolled, hot rolled, cold rolled, cold rolled, final rolled and finish annealed were observed by SEM respectively. Then the microstructure of the samples Zirconium alloy in different processing steps of the second phase size and distribution characteristics of the comparative analysis of two quantitative zirconium alloy obtained statistical results. Decreasing the content of Sn has a significant effect on the transformation point of α → β, while the particle shape of precipitated phase remains unchanged, but the average size of the second phase particles decreases. EDS analysis of the SEM semi-quantitatively shows that Sn has varying degrees of segregation in the zirconium alloy.