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电子束悬浮熔炼钼铼合金的铸锭晶粒粗大,致使热加工性能变差,通过对锻造过程和轧制过程两种开坯方式的受力状态分析,认为锻造开坯产生的拉应力垂直晶界是导致沿晶开裂的主要原因。基于以上研究提出了第一道次平行铸锭轴向喂料热轧开坯的工艺方法,在轧制过程中材料产生剪切滑移变形,此时钼铼合金铸锭滑移面与晶界成一定夹角,不产生垂直晶界的拉应力,避免了拉应力作用下的沿晶开裂,获得了优质热轧板。
Electron beam suspension melting molybdenum rhenium alloy ingot coarse grains, resulting in poor hot workability, through the forging process and the rolling process of two kinds of open billets of the stress state analysis, that forging billet tensile stress generated by the vertical crystal Circle is the main reason leading to crystal cracking. Based on the above research, the first method of parallel billet axial feeding hot rolling was proposed. During the rolling process, the material produced shearing and sliding deformation. At this time, the slip surface of molybdenum-rhenium alloy ingot and grain boundary A certain angle, does not produce vertical grain boundary tensile stress, to avoid the role of tensile stress along the crystal cracking, access to high-quality hot-rolled plate.