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用纯铁作为试验原料,进行了特高轧速的生产试验,结果表明原料某部位晶粒大,轧后对应部位晶粒也大,某部位晶粒小,则轧后对应部位晶粒也小,在精轧机出口速度为100m/s、变形速率相当于2 880s-1的条件下,轧件并未仅产生表面变形,轧件的变形也已渗透到轧件的中心。坯料晶粒均匀,轧后轧件的晶粒也均匀。但从轧件纵截面的晶粒形状看,轧件中心晶粒沿纵向稍有伸长,表面晶粒沿纵向稍有压缩,这是由于孔型轧制的特殊性造成的。
Pure iron was used as raw material to test the production of very high rolling speed. The results show that the grain size of a certain part of the raw material is large, the grain size of the corresponding part is also large after the rolling, and the grain size of a certain part is small, , The exit of the finishing mill is 100m / s and the deformation rate is equal to 2 880s-1. The rolling does not only produce the surface deformation, but also the deformation of the rolling stock has penetrated into the center of the rolling stock. Billet uniform grain, rolled grain rolling is also uniform. But from the longitudinal section of the rolling shape of the grain, the rolling center of the grain slightly elongated in the longitudinal direction, the surface of the grain slightly compressed in the longitudinal direction, which is due to the special nature of the hole rolling caused.