Bimetal wear-resistant seamless composite steel pipe and forming process thereof

A composite steel pipe and bimetal technology, which is applied in the direction of pipes, rigid pipes, furnace types, etc., can solve the problems of tube length limitation, bimetallic pipe failure, and prone to delamination, and achieves less damage and strong connection stability. , the overall combination of strong effect of stability

Inactive Publication Date: 2020-07-10
江苏福源泰管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molding method of mechanical composite has low cost and simple process, but the bonding force is small, and the interface is non-diffusion bonding, which is prone to delamination under high temperature conditions, resulting in failure of bimetallic tubes; for example, explosive molding composite manufacturing method, this method is mechanical composite , can produce composi

Method used

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  • Bimetal wear-resistant seamless composite steel pipe and forming process thereof
  • Bimetal wear-resistant seamless composite steel pipe and forming process thereof
  • Bimetal wear-resistant seamless composite steel pipe and forming process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A bimetallic wear-resistant seamless composite steel pipe, comprising an outer pipe 1, an inner pipe 2 assembled and mated, and a transition surface 3 between the outer pipe 1 and the inner pipe 2, the inner wall of the outer pipe 1 has an annular array of inner slots 11, The circular array on the outer wall of the inner pipe 2 has external inserts 21 adapted to be inserted into the inner slots 11, the number of the inner slots 11 and the outer inserts 21 is 3-5, and the sections of the inner slots 11 and the outer inserts 21 are trapezoidal structure, there are 4 in the figure;

[0032] Among them, the material of the outer pipe 1 and the inner pipe 2 is selected according to the national standard requirements of the corresponding field, such as, but not limited to, any one of 304, 304L, 316, 316L, 347, 825, Q345, L245, and L360; the transition surface 3. Diversified metal composite layers with carbon fiber cloth 31 as the skeleton (composed of alternately laying strip...

Embodiment 2

[0041] A bimetal wear-resistant seamless composite steel pipe, including an outer pipe (Q345) assembled and matched, an inner pipe (304), and a transition surface between the outer pipe and the inner pipe. The circular array on the outer wall of the pipeline has external inserts that fit and plug into the inner slots. The number of the inner slots and the outer inserts is four, and the cross-section of the inner slots and the outer inserts is a trapezoidal structure.

[0042] The preparation process of the transition surface is as follows. Take the unidirectional carbon fiber cloth, place it in 8wt% polyvinyl alcohol aqueous solution, soak it at 60±2°C for 10 minutes, take it out and dry it, then put it in 36.5wt% sodium silicate solution, take out the liquid The amount is 95%, and then the composite particles are laid in strips on the front and back of the unidirectional carbon fiber cloth. After the laying is completed, it is dried at 55°C for 20 minutes, and then placed in a...

Embodiment 3

[0051] A bimetallic wear-resistant seamless composite steel pipe, including an outer pipe (Q345) and an inner pipe (L245) for assembly and matching, and a transition surface between the outer pipe and the inner pipe. The circular array on the outer wall of the pipeline has external inserts that fit and plug into the inner slots. The number of the inner slots and the outer inserts is four, and the cross-section of the inner slots and the outer inserts is a trapezoidal structure.

[0052] The preparation process of the transition surface is as follows. Take the unidirectional carbon fiber cloth, put it in 8wt% polyvinyl alcohol aqueous solution, soak it at 65±1°C for 10 minutes, take it out and dry it, then put it in 35wt% sodium silicate solution, take out the amount of liquid 90%, and then lay composite particles on the front and back of the unidirectional carbon fiber cloth in the form of strips. After the laying is completed, dry at 60°C for 10 minutes, and place it in a 35wt...

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Abstract

The invention provides a bimetal wear-resistant seamless composite steel pipe and a forming process thereof. The bimetal wear-resistant seamless composite steel pipe comprises an outer pipe, an innerpipe and a transition surface for a gap of the outer pipe and the inner pipe, wherein the outer pipe and the inner pipe are assembled and connected in a sleeving mode, inner slots are formed in the inner wall of the outer pipe in an annular array mode, outer insertion strips inserted in the inner slots in a matched mode are arranged on the outer wall of the inner pipe in an annular array mode, theinner pipe is a stainless steel composite pipe, and the transition surface is a diverse metal composite layer with carbon fiber cloth as a framework. According to the bimetal wear-resistant seamlesscomposite steel pipe, the transition surface is specially designed to serve as a bonding transition layer of the inner pipe and the outer pipe, the permeability is good, and the connection stability is high; and various interference layers are formed by adopting composite particles with different thermal expansibility and infrared thermal expansion, the bimetal wear-resistant seamless composite steel pipe is suitable for different environmental working conditions, and the comprehensive practicability is high.

Description

technical field [0001] The invention relates to the technical field of pipeline processing, in particular to a bimetal wear-resistant seamless composite steel pipe and its forming process. Background technique [0002] Seamless steel pipes have a hollow cross-section and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolds used in construction, such as steel scaffolds, are used to make ring parts with steel pipes, which can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, and ...

Claims

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Application Information

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IPC IPC(8): F16L9/14C21D1/28C21D1/18C21D9/08B23P15/00B32B1/08B32B9/00B32B9/04B32B7/12B32B33/00
CPCB32B1/08B32B5/02B32B7/12B32B9/047B32B33/00B32B2260/021B32B2260/046B32B2262/106B32B2597/00C21D1/18C21D1/28C21D9/08F16L9/14
Inventor 孟阳慧
Owner 江苏福源泰管业有限公司
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