The Effect of CRITSIMA Process Parameters on the Microstructure Evolution and Element Segregation of Semi-Solid CuSn10P1 Alloy Billet
The Effect of CRITSIMA Process Parameters on the Microstructure Evolution and Element Segregation of Semi-Solid CuSn10P1 Alloy Billet
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DOI：
10.3390/met12030487
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发表时间：
2022-03
期刊：
影响因子：
2.9
通讯作者：
Xiongchao Zhang;Lei Chen;Han Xiao;Yuhang Zhou;Hao‐Lin Chen;Z. Duan
中科院分区：
文献类型：
--
作者：
Xiongchao Zhang;Lei Chen;Han Xiao;Yuhang Zhou;Hao‐Lin Chen;Z. Duan
本文以铸态CuSn10P1合金为研究对象。采用冷轧等温应变诱导熔化活化法(CRITSIMA)制备了CuSn10P1合金半固态坯料。利用金相显微镜和Image-Pro Plus软件研究了冷轧变形量、等温温度和等温时间对半固态铜合金铸坯组织的影响。利用配有能谱仪的扫描电子显微镜对铸态和半固态组织中主要元素的变化进行了简要分析。结果表明，随着冷轧变形量的增加，半固态组织的平均晶粒直径逐渐减小，平均晶粒圆度呈先增大后减小的趋势，而组织中的含液量保持不变。在半固态等温处理过程中，随着等温温度的升高和等温时间的延长，平均晶粒直径逐渐增大，平均晶粒圆度先增大后减小，含液量逐渐增加。当冷轧变形量为30%，等温温度为900min，等温时间为20min时，可获得较好的显微组织。半固态合金铸坯的平均晶粒度为66.45μm，平均晶圆度为0.71，平均含液率为12.78%。在从铸态到半固态的等温处理过程中，锡和磷从晶间液体向晶内扩散。
In this paper, based on the as-cast CuSn10P1 alloy. Semi-solid CuSn10P1 alloy billet was prepared by cold-rolled isothermal treatment strain-induced melting activation (CRITSIMA). The effects of cold-rolling reduction, isothermal temperature, and isothermal time on the microstructure of semi-solid copper alloy billet were studied by metallographic microscope and Image-Pro Plus software. The changes of primary elements in as-cast and semi-solid microstructure were analyzed briefly by a scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS). The results show that with the increase of cold rolling reduction, the average grain diameter of semi-solid microstructure decreases gradually, the average grain roundness increases first and then decreases, and the liquid fraction of the microstructure remains unchanged. During semi-solid isothermal treatment, with the increase of isothermal temperature and the extension of isothermal time, the average grain diameter increases gradually, the average grain roundness increases first and then decreases, and the liquid fraction increases gradually. When cold rolling reduction is 30%, isothermal temperature is 900 ℃, and isothermal time is 20 min, a better microstructure can be obtained. The average grain diameter, average grain roundness, and liquid fraction of semi-solid alloy billet are 66.45 μm, 0.71, and 12.78%, respectively. Sn and P diffuse from the intergranular liquid to the grain inside during the isothermal treatment from as-cast to semi-solid.