Efficient preparation method of bimetallic seamless composite pipe

US12290848B1 · kind B1 · utility

Assignee

• TAIYUAN UNIVERSITY OF TECHNOLOGY · CN

Inventors

• Jianchao Han · Taiyuan, CN
• Yanjun Wang · Shanghai, CN
• Yi Jia · Shanghai, CN
• Xinlong Zhang · Shenyang, CN
• Wei Zhang · Nanjing, CN
• Yizhi Zhang · Lo Wu, CN
• Shuzhi Zhang · 富官庄镇, CN
• Changjiang Zhang · Beijing, CN
• Tao Wang · Beijing, CN

Key dates

• Filing date: Jul 10, 2024
• Grant date: May 6, 2025
• Expiry date: Jul 10, 2044

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D9/08
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Provided is an efficient preparation method of a bimetallic seamless composite pipe, and belongs to the technical field of steel pipe manufacture. The efficient preparation method of the bimetallic seamless composite pipe includes following steps: sheathing a base pipe blank on a cladding pipe blank to obtain a composite pipe blank, and carrying out a stress relief annealing treatment on the composite pipe blank, where the base pipe blank and the cladding pipe blank are made of different materials; heating the composite pipe blank after the stress relief annealing treatment to a hot working window temperature, and sheathing on a core rod of an extrusion cylinder after an insulation treatment, and then extruding along an axial direction of the extrusion cylinder to obtain a bimetallic seamless composite pipe.