ND steel seamless steep pipe production process

• Main Author: ZHOU YIXIN
• Format: Patent
• Language: Chinese; English
• Published: 13.12.2019
• Subjects: APPARATUS THEREFOR; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; PERFORMING OPERATIONS; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The invention discloses an ND steel seamless steep pipe production process, and belongs to the technical field of steel pipe production processes. The ND steel seamless steep pipe production process includes the following steps of firstly, a stage when a purchased raw material pipe blank is subjected to primary inspection; secondly, a stage when the ND steel-pipe pipe blank after being qualified in inspection is heated; thirdly, a stage when the pipe blank which is cut off is subjected to perforating; fourthly, a stage when the steel pipe after being subjected to perforating is subjected to pipe detaching treatment; fifthly, a stage when the steel pipe after being subjected to perforating is subjected to sizing treatment; and sixthly, the steel pipe after being subjected to pipe detachingneeds to be subjected to straightening treatment. After raw material carbon steel and stainless steel are replaced into ND steel, machining is performed, the hardness and the corrosion resisting degree are improved from the m