The mechanical properties of the steel pipe rolled with continuously casting round billet after determining the chemical composition in steel were studied.The results show that the total reduction ratio should be high...The mechanical properties of the steel pipe rolled with continuously casting round billet after determining the chemical composition in steel were studied.The results show that the total reduction ratio should be higher than 5.2 when the line pipes of grade B,grade 20 and other general seamless pipe were rolled with continuously casting round billet.And the total reduction ratio should be higher than 10.2 and the grain size should be controlled more than grade 7 for casing of oil countryside tubular goods(OCTG).展开更多
文摘The mechanical properties of the steel pipe rolled with continuously casting round billet after determining the chemical composition in steel were studied.The results show that the total reduction ratio should be higher than 5.2 when the line pipes of grade B,grade 20 and other general seamless pipe were rolled with continuously casting round billet.And the total reduction ratio should be higher than 10.2 and the grain size should be controlled more than grade 7 for casing of oil countryside tubular goods(OCTG).
