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Preparation method for double-layer or multilayer metal composite pipe and rod parison

A multi-layer metal and composite pipe technology, applied in metal processing equipment, casting molding equipment, casting molds, etc., can solve the problems of high production cost, low production efficiency, cumbersome process, etc., and achieve the reduction of comprehensive production cost and process cost , The effect of process simplification

Pending Publication Date: 2020-07-10
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biggest disadvantage of this type of method is that the process is cumbersome, the production efficiency is low, and a large plastic deformation is required to eliminate the gap between the cladding and the substrate.
Patent publications CN101670383A, CN101566256A, JPH02229616A, etc. adopt the brazing method to make blanks. This method is to add an isolation layer between the two tube blanks, which can prevent the formation of brittle compounds at the interface and improve the interface toughness. Larger plastic deformation can improve the interface bonding strength
Chinese patent publications CN103962558A, CN101934370B, etc. adopt injection molding technology to spray another metal melt on the outer surface of the inner tube blank to prepare a composite tube blank. Although this method can obtain a surface fine-grained or ultra-fine-grained metal layer, but The metal thickness of the surface layer is not easy to control, the injection molding efficiency is not high, and the process parameters are not easy to control
The interface bonding strength of the composite tube billet cast by this method is high, but the disadvantage is that the interface area is mixed and melted seriously, the process is relatively complicated, and the production cost is high.

Method used

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  • Preparation method for double-layer or multilayer metal composite pipe and rod parison
  • Preparation method for double-layer or multilayer metal composite pipe and rod parison
  • Preparation method for double-layer or multilayer metal composite pipe and rod parison

Examples

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preparation example Construction

[0028] Such as figure 1 , figure 2 , Figure 4 As shown, a method for preparing a double-layer or multi-layer metal composite pipe rod parison according to the present invention comprises the following steps:

[0029] a. Prepare raw materials: select the outer layer metal material of the composite tube and rod parison as the material to be cast, use the melting device to melt the outer layer of metal material to obtain a liquid metal melt; select the inner layer metal material of the composite tube and rod parison as the material to be cast Composite solid materials, and process it into a solid metal core blank 9, process 2 positioning bolt holes at the bottom of the solid metal core blank 9, remove the oxide skin on the surface of the solid metal core blank 9, clean its surface and dry it;

[0030]b. Prepare the casting mold: Design the shape and size of the casting mold according to the shape and size of the composite tube and rod parison. The casting mold is composed of ...

Embodiment 1

[0043] In this example, 304 stainless steel is used as the cladding material, and Q345 low-alloy steel is used as the inner layer material to prepare a 304 / Q345 bimetal composite round billet. In the finished bimetallic composite round billet, the thickness of the 304 stainless steel cladding material is 20mm, the diameter of the Q345 low alloy steel inner layer material is φ200mm, the outer diameter of the finished product is φ240mm, and the length is 2000mm. Concrete preparation process is as follows:

[0044] a. Select 304 stainless steel as the outer layer material to be cast, and use an induction furnace to melt 304 stainless steel to obtain a 304 stainless steel melt; select a Q345 plain carbon steel bar with a diameter of φ202mm and a length of 2050mm as the inner layer material to be composited, in Q345 Two M16×20mm positioning bolt holes are processed at the bottom of the steel core, and the iron oxide scale on the surface of the Q345 steel core is removed by mechanic...

Embodiment 2

[0050] Such as figure 1 , figure 2 As shown, in this embodiment, 2205 duplex stainless steel is used as cladding material, and 20MnSi low alloy steel is used as inner layer material to prepare 2205 duplex stainless steel / 20MnSi low alloy steel bimetallic composite rectangular billet, bimetallic composite rectangular rod In the finished billet, the thickness of the 2205 duplex stainless steel cladding is 20mm, the cross-sectional size of the 20MnSi low alloy steel core is 240×320mm, and the length of the finished product is 2000mm. Specific steps are as follows:

[0051] a. Select 2205 duplex stainless steel as the outer layer material to be cast, and use an induction furnace to melt 2205 duplex stainless steel to obtain a 2205 duplex stainless steel melt; select 20MnSi low-alloy square steel with a cross-sectional size of 200×280mm as the solid metal to be compounded Steel core, the length of which is 2050mm. Process two M16×20mm positioning bolt holes at the bottom of the...

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Abstract

The invention relates to a preparation method for a double-layer or multilayer metal composite pipe and rod parison. The method comprises the following steps of a, preparing raw materials; b, preparing a mold; c, loading the mold; d, casting and compounding; e, cooling and molding; and f, preparing a multilayer metal composite blank. According to the method, a bimetal composite pipe and rod parison is obtained by adopting a conventional mold casting method, and the metal composite pipe and rod parison is obtained through subsequent plastic deformation and is low in production cost and good incompound effect.

Description

technical field [0001] The invention relates to the technical field of metal material composite casting, in particular to a method for preparing a double-layer or multi-layer metal composite tube and rod parison. Background technique [0002] Double-layer or multi-layer metal composite materials are usually made of stainless steel, titanium alloy, nickel-based alloy, hard wear-resistant materials, etc. . This kind of composite material not only has the advantages of high strength, high plastic toughness, excellent welding performance and low production cost of the base material, but also has the characteristics of corrosion resistance, wear resistance, oxidation resistance and gorgeous appearance of the cladding material. Cladding materials have incomparable price advantages and performance. Therefore, the use of double or multilayer metal composites instead of a single cladding material has broad application prospects. Composite rolling method has been the best choice so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22C9/24B22C9/06B22C9/08
CPCB22C9/06B22C9/082B22C9/24B22D19/16
Inventor 井玉安刘亮飞郑淑钰
Owner UNIV OF SCI & TECH LIAONING
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