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Forming process of nickel-based bimetal composite tube

A technology of bimetallic composite pipe and metal outer pipe, applied in the direction of furnace types, manufacturing tools, furnaces, etc., can solve the problems of high cost and low efficiency, and achieve the effect of low cost, high efficiency and strengthened solid solution

Inactive Publication Date: 2018-03-09
YANGZHOU PIPE FITTING FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are disadvantages such as high cost and low efficiency

Method used

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  • Forming process of nickel-based bimetal composite tube

Examples

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Embodiment Construction

[0028] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, and therefore are only examples, and should not be used to limit the scope of protection of this patent.

[0029] A method for preparing a nickel-based bimetallic composite pipe fitting, taking pipeline steel L360 as the metal outer pipe 31 and N08825 as the nickel-based alloy lining pipe as an example, the steps of the method are as follows:

[0030] like figure 1 , The metal outer tube 31 is made of pipeline steel L360, the yield strength of the metal outer tube 31 is less than two-thirds of the maximum tensile strength of the metal outer tube 31, and it is directly formed by cold pushing. In this embodiment, the mold 1 is set in a cold extrusion molding machine, and the mold 1 includes two half-moulds 11 , and a ...

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Abstract

The invention discloses a forming process of a nickel-based bimetal composite tube, comprising the steps of pretreating, forming by cold pushing, performing solution treatment, and tempering; the stepof forming by cold pushing includes placing a nickel-based bimetal composite tube in a die of a cold-extrusion former, and allowing a punch of the cold-extrusion former to act on the nickel-based bimetal composite tube through a forming hole arranged in the die so as to finish forming by cold pushing; the forming by cold pushing, solution treatment and tempering are performed sequentially repeatedly until the nickel-based bimetal composite tube reaches finish specifications; ends of the nickel-based bimetal composite tube are cut off by flame cutting, sawing, toothless saw cutting or plasma cutting, and the finished composite tube is obtained; iron oxide skin on the inner and outer surfaces of the finished composite tube is removed by chemical or mechanical means. The forming process of the nickel-based bimetal composite tube can provide reduced production cost and improved production efficiency.

Description

technical field [0001] The invention relates to the field of layered metal composite materials, in particular to a forming process for nickel-based bimetallic composite pipe fittings. Background technique [0002] Metal composite pipe is a pipe made of two or more metal pipes of different materials through metallurgical or mechanical methods. cost-effective. Therefore, metal composite pipes are more and more popular. [0003] Nickel-based bimetal composite pipe fittings, as a kind of metal composite pipe, play an important role in some special fields. For oil and gas pipelines, corrosion-resistant nickel-based alloy pipes must be used, but the cost of pure nickel-based alloy pipes is very high, while nickel-based bimetallic composite pipe fittings greatly reduce the cost under the same conditions of use; at the same time, the cost of pipe fittings It accounts for 10% of the entire pipeline cost, while the cost of nickel-based bimetallic composite pipe fittings is only one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/15B21C23/22C21D9/08C22F1/10
CPCB21C37/154B21C23/22C21D9/08C22F1/10
Inventor 陆恒平问林先
Owner YANGZHOU PIPE FITTING FACTORY
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