摘要
电子束悬浮熔炼钼铼合金铸锭晶粒粗大,致使热加工性能变差,锻造过程出现开裂,文章分析了锻造过程材料的受力状态,认为是垂直晶界的拉应力导致沿晶开裂,据此提出了热轧开坯的工艺方法,且规定第1道次平行铸锭轴向喂料,轧制过程中材料产生剪切滑移变形,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,获得优质热轧板。
Hot workability of the molybdenum rhenium alloy ingots fabricated by electron beam suspension melting deteriorates and cracks during forging because of its coarse grains.The stress state in the process of forging was analyzed,and it is suggested that tension stress perpendicular to the grain boundary leads to intergranular cracking.The hot-rolled breakdown process is presented,and it is suggested that feed direction should be along ingot axis at the first pass.Shear slip deformation is produced during rolling,and a certain angle should be formed between grain boundaries and sliding surface,so that tension stress is inclined to grain boundaries,avoiding intergranular cracks and obtaining high-quality hot-rolled plates.
出处
《中国钼业》
2010年第5期38-40,共3页
China Molybdenum Industry
关键词
钼铼合金
粗晶
锻造
拉应力
沿晶开裂
轧制
剪切滑移
应力方向
molybdenum rhenium alloys
coarse grain
forging
tensile stress
intergranular cracking
rolling
shear slip
stress direction
