Manufacturing process of hot-rolled composite corrosion-resistant bimetallic steel pipe

A bimetallic steel pipe, hot-rolled composite technology, applied in metal rolling and other directions, can solve the problems of not fully meeting the needs of use, large consumption of metal raw materials, less raw material sources, etc., to save the consumption of metal raw materials, low production costs, reduce The effect of production costs

Inactive Publication Date: 2011-12-14
SICHUAN SANZHOU SPECIAL STEEL PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, in terms of high-end (mainly petrochemical, but not building material decoration) seamless corrosion-resistant composite pipe manufacturing technology, the combination of metals is generally metallurgical composite, and the commonly used methods include explosive composite, centrifugal casting and Combination of hot extrusion, welding, outer cladding, laser cladding, etc., a certain amount of metal raw materials are required in the production process, which has complex production processes, high production costs, high raw material costs, less raw material sources, and metal raw material consumption. Larger, the maximum outer diameter of the product is only 219mm, which cannot fully meet the needs of use and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] To produce hot-rolled composite corrosion-resistant bimetallic steel pipes with a finished product specification of 355.6*16+3mm, the steel pipes of the following materials are selected: outer layer steel pipe X60 PSL2, inner layer steel pipe TP316L, and the manufacturing process includes the following steps:

[0017] (1) Tube blank preparation: Prepare two or more specifications of single metal steel tube blanks required for the manufacture of composite pipes according to the finished product specifications. Among them, the outer steel tube blanks are 480*60mm X60 PSL2 seamless tubes, and the inner layer The steel pipe blank is 356*15mm TP316L stainless steel pipe, and the joint surface of the steel pipe is treated to remove the rust corrosion products on the joint surface of the steel pipe, and the joint surface is treated by mechanical grinding to increase the roughness of the joint surface. Carry out degreasing, cleaning, drying and other treatments before covering; ...

Embodiment 2

[0025] To produce hot-rolled composite corrosion-resistant bimetallic steel pipes with a finished product specification of 508*5+15+5mm, the steel pipes of the following materials are selected: TP403 inner and outer layer steel pipes, and 16Mn steel pipes for the middle layer. The manufacturing process is as follows:

[0026] (1) Tube blank preparation: Prepare two or more specifications of single metal steel tube blanks required for the manufacture of composite pipes according to the finished product specifications. Seam pipe, the middle layer of the steel pipe blank is 640*60mm 16Mn seamless pipe, and the joint surface of the steel pipe is treated to remove the rust and corrosion products on the joint surface of the steel pipe, and the joint surface is treated by mechanical grinding to increase the roughness of the joint surface Degreasing, cleaning, drying and other treatments are carried out before the three tubes are nested;

[0027] (2) Mechanical compounding: the prepar...

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PUM

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Abstract

The invention discloses a hot-rolled composite corrosion-resistant bimetallic steel pipe manufacturing process, which includes the following steps: (1) tube blank preparation; (2) mechanical compounding; (3) welding edge sealing; (4) tube blank heating; 5) hot rolling composite; (6) heat treatment; (7) post-finishing. The invention provides a manufacturing process of hot-rolled composite corrosion-resistant bimetallic steel pipes. Two or more steel pipes of different materials and specifications are made into composite pipe blanks, and the composite pipe blanks are rolled into composite pipes meeting the requirements. The relative deformation of the finished product is not less than 60% during hot rolling and compounding, which avoids the problems of high cost and difficulty in the traditional metallurgical compounding process, and has the advantages of low raw material cost, saving metal raw material consumption, low production cost, and compounding The effect is good, and the maximum outer diameter of the product can reach 610mm.

Description

technical field [0001] The invention relates to a manufacturing process of a hot-rolled composite corrosion-resistant bimetallic steel pipe. Background technique [0002] At present, in terms of high-end (mainly petrochemical, but not building material decoration) seamless corrosion-resistant composite pipe manufacturing technology, the combination of metals is generally metallurgical composite, and the commonly used methods include explosive composite, centrifugal casting and Combination of hot extrusion, welding, outer cladding, laser cladding, etc., a certain amount of metal raw materials are required in the production process, which has complex production processes, high production costs, high raw material costs, less raw material sources, and metal raw material consumption. Larger, the maximum outer diameter of the product is only 219mm, which cannot fully meet the needs of use and other shortcomings. Contents of the invention [0003] The purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B21/00B21B17/00
Inventor 李文农刘珂陈勇周贵禄李孔军
Owner SICHUAN SANZHOU SPECIAL STEEL PIPE
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