钼铼合金铸锭热加工方式的研究
Research on Processing Methods for Molybdenum Rhenium Alloy Ingot
刘 辉1,2, 巨建辉1,2, 张军良2, 李中奎2
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作者单位：(1. 西安建筑科技大学, 陕西 西安 710055; 2. 西北有色金属研究院, 陕西 西安 710016)
中文关键字：钼铼合金； 锻造； 拉应力； 沿晶开裂； 轧制应力方向
英文关键字：molybdenum rhenium alloy; forging; draw stress; crack along grain boundry; rolling stress orientation
中文摘要：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。
英文摘要：The electron beam melting of molybdenum rhenium alloy ingots has coarse grains, which result in the deterioration of thermal processing performance. The rolling forging process and cogging force state were introduced, it can conclude that the cogging forging vertical tensile stress produced by grain boundary is the main reason for intergranular cracking. Blooming hot process method for the first pass paralleling to the axial feed ingot was put forward, so that the shear slip deformation of material generates in the process of rolling. At this time, the molybdenum rhenium alloy ingots and grain boundary sliding surface get into a certain angle, which does not produce the tensile stress perpendicular to the grain boundary to avoid the effect of tensile stress crack along the grain to obtain high-quality hot-rolling plate.