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Preparation method of large wall thickness stainless steel/carbon steel layered structure composite pipe

A stainless steel layer, composite pipe technology, applied in manufacturing tools, welding equipment, laser welding equipment, etc., can solve the problems of low welding efficiency, poor weld quality and performance, and achieve improved weld quality and performance, and production efficiency. Increased, wide-ranging effects

Active Publication Date: 2022-05-17
SHAANXI RAILWAY INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method for large-wall stainless steel / carbon steel layered structure composite pipes, which solves the problems of low welding efficiency, poor weld quality and performance in the prior art

Method used

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  • Preparation method of large wall thickness stainless steel/carbon steel layered structure composite pipe
  • Preparation method of large wall thickness stainless steel/carbon steel layered structure composite pipe
  • Preparation method of large wall thickness stainless steel/carbon steel layered structure composite pipe

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specific example

[0033] see figure 1 , the 2205 / X65 large wall thickness stainless steel / pipeline steel layered structure composite plate with a wall thickness of 28mm prepared by "vacuum sealing welding + hot rolling + continuous controlled rolling and controlled cooling" is used as the experimental raw material plate, and the thickness of the 2205 stainless steel layer is 3mm The thickness of the X65 pipeline steel layer is 25mm. After cleaning the debris, rust and hard blocks on both sides of the plate, the Φ610×28mm 2205 / X65 stainless steel / pipeline steel layered structure composite pipe is manufactured. The specific steps are as follows:

[0034] Step 1: Carry out "I+V" groove milling on two longitudinal sides of the 2205 / X65 large-wall stainless steel / pipeline steel layered structure composite plate, and clean the surface again within the range of 10-20mm on both sides of the groove. The specific parameters of the groove processing are: "V" type groove is located on the side of the carbo...

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Abstract

The invention discloses a method for preparing a large-wall stainless steel / carbon steel layered structure composite pipe, which is specifically implemented according to the following steps: 1. The stainless steel layer and the carbon steel layer are vacuum sealed and welded, hot rolled, and continuously controlled rolling and controlled cooling 2. Process the metallurgical composite plate obtained in step 1; 3. Make the metallurgical composite plate processed by step 2 into a tubular shape; 4. Use laser + cold metal transition Composite welding and submerged arc automatic welding process are used to weld at the corresponding gaps to make large-wall stainless steel / carbon steel layered structure composite pipes, in which the welding process is carried out within the scope of the weld pool of the stainless steel layer with a length of 250mm and a width of 20mm. Protected by inert gas, the cladding metal width of the weld seam of the stainless steel layer is 5-10mm, the width of the cladding metal of the weld seam of the carbon steel layer is 10-30mm, and the reinforcement height is 1-3mm. The efficiency of preparing the composite pipe through the method of the invention is higher, and the weld seam performance of the obtained composite pipe is better.

Description

technical field [0001] The invention belongs to the technical field of composite pipe preparation, and relates to a preparation method of a large-wall stainless steel / carbon steel layered structure composite pipe. Background technique [0002] Stainless steel / carbon steel layered structure metallurgical composite pipe has excellent interface bonding strength and comprehensive mechanical properties, which can avoid quality problems such as delamination and collapse; the most important thing is that the inner stainless steel has excellent corrosion resistance and can be used in general acidic environments. Safe service, and can meet the storage and transportation requirements of corrosive media, maximize the complementary advantages of materials, significantly reduce pipeline construction costs, improve pipeline corrosion resistance, safety and reliability, and have very huge market value and economic benefits in various fields . [0003] For example, for urban drinking water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23K26/21B23K26/346
CPCB23P15/00B23K26/21B23K26/346Y02A20/152
Inventor 杨军南黄河
Owner SHAANXI RAILWAY INST
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