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Semi-solid forming method of composite pipe

A technology for semi-solid forming and composite material pipes, which is applied in the field of metal semi-solid forming, which can solve the problems of long forming cycle, high product cost, and difficult processing and manufacturing of difficult-to-deform material pipes, and achieve high interface bonding strength and reduce forming Easy to load and operate

Inactive Publication Date: 2016-04-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method solves the problems of difficulty in processing and manufacturing hard-to-deform material pipes, long forming cycle, high product cost, etc., and broadens the application field of semi-solid forming technology. The present invention is realized through the following technical solutions

Method used

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  • Semi-solid forming method of composite pipe

Examples

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Effect test

Embodiment 1

[0023] Taking Q235 carbon steel and high-chromium cast iron as an example to prepare composite material pipes, the hard-to-plastic deformation material of the middle layer is high-chromium cast iron, and the easy-to-plastic deformation material is Q235 carbon steel.

[0024] The composite tube semi-solid forming method, its specific steps are as follows:

[0025] (1) Measure the solidus and liquidus temperatures of the difficult-to-plastically deform material in the middle layer, and use differential scanning calorimetry (DSC) to measure the solidus temperature of high-chromium cast iron to be 1230°C and the liquidus temperature to be 1420°C;

[0026] (2) A three-layer composite material tube blank is obtained by casting with a centrifugal casting machine: first, pour the outer layer of easily plastically deformable material with a thickness of 6 mm, then cast the middle layer of difficultly plastically deformable material, and finally cast the inner layer of easily plastically...

Embodiment 2

[0031] Taking 45# carbon steel and ZCuSn10P1 tin bronze as an example to prepare a composite material pipe, the material of the middle layer that is hard to deform plastically is ZCuSn10P1 tin bronze, and the material that is easily plastically deformable is 45# carbon steel.

[0032] The composite tube semi-solid forming method, its specific steps are as follows:

[0033] (1) Measure the solidus and liquidus temperatures of the hard-to-plastically deformable material in the middle layer, and use differential scanning calorimetry (DSC) to measure the solidus temperature of ZCuSn10P1 tin bronze to be 820°C and the liquidus temperature to be 1003°C;

[0034] (2) A three-layer composite material tube blank is obtained by casting with a centrifugal casting machine: first, pour the outer layer of easily plastically deformable material with a thickness of 5mm, then cast the middle layer of difficultly plastically deformable material, and finally cast the inner layer of easily plastic...

Embodiment 3

[0039] Taking stainless steel and ZCuSn10 tin bronze as an example to prepare a composite material tube, the material of the middle layer that is difficult to deform plastically is ZCuSn10 tin bronze, and the material that is easy to deform plastically is stainless steel.

[0040] The composite tube semi-solid forming method, its specific steps are as follows:

[0041] (1) Measure the solidus and liquidus temperatures of the hard-to-plastic-deformable material in the middle layer, and use differential scanning calorimetry (DSC) to measure the solidus temperature of ZCuSn10 tin bronze to be 830°C and the liquidus temperature to be 1020°C;

[0042] (2) A three-layer composite material tube blank is obtained by casting with a centrifugal casting machine: first, pour the outer layer of easily plastically deformable material with a thickness of 2mm, then cast the middle layer of difficultly plastically deformable material, and finally cast the inner layer of easily plastically defor...

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Abstract

The invention relates to a semi-solid forming method of a composite pipe, and belongs to the technical field of semi-solid forming of metal. The semi-solid forming method comprises the following steps: at first, pouring a three-layered material by a centrifugal casting machine to obtain a composite pipe blank (at first, pouring an outer-layer easy-to-plastic deformation material, then pouring the middle-layer difficult-to-plastic deformation material, and at last, pouring an inner-layer easy-to-plastic deformation material); then, heating the composite pipe blank to the solid-liquid temperature interval of the difficult-to-plastic deformation material to enable the composite pipe blank to be in the semi-solid state, and reducing the diameter and the wall thickness of the composite pipe blank through high-speed extrusion, so as to obtain a pipe with a certain length; and at last, heating the hot extrusion pipe, so as to obtain a composite pipe with different mechanical properties. The semi-solid forming method solves the problem that a difficult-to-deformation pipe is difficult to process and manufacture, long in forming cycle, and high in product cost, and expands the application field of a semi-solid forming technology.

Description

technical field [0001] The invention relates to a semi-solid forming method for a composite material tube, which belongs to the technical field of metal semi-solid forming. Background technique [0002] Multi-layer composite material is a composite material that combines two or more materials in layers to form a stable combination. It can combine the advantages of various metal materials, so that the composite material has special physical, chemical and mechanical properties, and meets high Strength, high specific strength, high specific stiffness, high wear resistance, high fatigue resistance, high corrosion resistance and other requirements, so it is widely used in mechanical engineering, aerospace, vehicle engineering, petrochemical, electric power industry and other fields. [0003] At present, the preparation methods of multilayer composite pipes can be divided into two categories according to the bonding form: mechanical bonding and metallurgical bonding. In recent ye...

Claims

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Application Information

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IPC IPC(8): B21C37/06B22D19/16B22D13/00
CPCB21C37/06B22D13/00B22D19/16
Inventor 肖寒陈泽邦周慧子李勇卢德宏周荣锋蒋业华周荣
Owner KUNMING UNIV OF SCI & TECH
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