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NEWTECHNIQUEFORSEAMLESSSTEELTUBEROLLINGDEVELOPEDBYSUMITOMOMETALINDUSTRIES，LTD．据报道，住友金属工业公司近期推出无缝钢管轧制新技术，该技术主要是在穿孔时，采用大底角穿孔。住友金属工业公司的研究结果表明，管坯在两根轴心线相交的锥形轧辊间喂入，其轧制出口速度
NEWTECHNIQUEFORSEAMLESSSTEELTUBEROLLINGDEVELOPEDBYSUMITOMETALINDUSTRIES, LTD. It is reported that Sumitomo Metal Industries recently introduced a new seamless steel pipe rolling technology, the technology is mainly used in perforation, the use of large perforation. Sumitomo Metal Industries, the results of the study showed that the tube billet in the intersection of the two axes between the conical roll feeding, the rolling exit speed