公开(公告)号：US3698070A

公开(公告)日：1972-10-17

申请号：US3698070D

申请日：1970-09-24

Applicant: CEFILAC

Inventor： SEJOURNET JACQUES ,  GARIN JOSE IGNACIO MARTINEZ

IPC: B21C23/08 ,  B23K19/00

CPC classification number: B21C23/085 ,  Y10S29/047 ,  Y10T29/49989

Abstract: A process for the manufacture of seamless steel tubing comprising continuous casting rectangular cross-section bars, cutting the bars into billets, heating the billets, upsetting and piercing the billets into hollow circular cross-sectioned blanks, hot extruding the blanks into seamless tubes and stretch reducing the seamless tubes where necessary.

Abstract translation: 一种用于制造无缝钢管的方法，包括连续铸造矩形横截面棒，将棒切割成坯料，加热坯料，镦锻和将坯料刺穿成中空的圆形横截面坯料，将坯料热挤压成无缝管并拉伸 在必要时减少无缝管。