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Interface-thermal-resistance-based differential temperature control method for compound spinning of dissimilar metal

A dissimilar metal and composite spinning technology, which is applied in metal processing equipment, manufacturing tools, forming tools, etc., can solve the problem of not effectively increasing the contact thermal resistance of the solid deformation composite interface of dissimilar metals, and forming a large temperature gradient on both sides of the metal interface etc. to achieve the effect of reducing the contact area, increasing the temperature gradient, and hindering heat conduction

Active Publication Date: 2016-12-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing method is difficult to form a large temperature gradient on both sides of the metal interface, and cannot effectively increase the interface contact thermal resistance when dissimilar metals are solid-state deformed and recombined, and provides a dissimilar thermal resistance based on the interface thermal resistance. Differential Temperature Control Method of Metal Composite Spinning

Method used

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  • Interface-thermal-resistance-based differential temperature control method for compound spinning of dissimilar metal
  • Interface-thermal-resistance-based differential temperature control method for compound spinning of dissimilar metal

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specific Embodiment approach 1

[0014] Specific implementation mode 1: In this implementation mode, a dissimilar metal composite spinning differential temperature control method based on interface thermal resistance is specifically carried out according to the following steps:

[0015] 1. Process the spiral groove 5 on the outer surface of the dissimilar metal inner tube 8 or the inner surface of the dissimilar metal outer tube 7; degrease the outer surface of the dissimilar metal inner tube 8 and the inner surface of the dissimilar metal outer tube 7 in sequence Scratching with a steel brush, and then stacking the dissimilar metal inner tube 8 and the dissimilar metal outer tube 7 together, the contact surface of the dissimilar metal inner tube 8 and the dissimilar metal outer tube 7 is the interface;

[0016] Two, the interior of the dissimilar metal inner tube 8 is provided with a mandrel 6, the mandrel 6 adopts a rotating heating device, and the mandrel 6 is used as an inner tube heat source; the outer si...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment is different from Embodiment 1 in that: the material of the dissimilar metal inner tube 8 in step 1 is 5A03 aluminum alloy. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the material of the dissimilar metal outer tube 7 in step 1 is 3A21 aluminum alloy. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention belongs to the technical field of heating in metal material plastic processing, relates to an interface-thermal-resistance-based differential temperature control method for compound spinning of dissimilar metal and aims to solve the problems that a conventional method has difficulties in forming large temperature gradients on two sides of a metal interface and cannot effectively increase the interface contact thermal resistance during solid deformation compounding of the dissimilar metal. According to the interface-thermal-resistance-based differential temperature control method, differential temperature heating is performed on an inner tube and an outer tube by use of different heat sources, so that a large temperature gradient is formed between the inner tube and the outer tube; spiral grooves are formed in the outer surface of the inner tube or in the inner surface of the outer tube, so that the actual contact area between the inner tube and the outer tube during interface heat transfer is reduced, and heat flux exchange at the interface of metal of the inner tube and the outer tube is inhibited. The interface-thermal-resistance-based differential temperature control method forms the large temperature gradient between the metal of the inner tube and the outer tube, and therefore, realizes differential temperature control during compound spinning of the dissimilar metal.

Description

technical field [0001] The invention belongs to the technical field of heating in plastic processing of metal materials, and relates to a differential temperature control method of dissimilar metal composite spinning based on interface thermal resistance. Background technique [0002] With the increasing demand for dissimilar metal composite plates / pipes / components in petrochemical, marine development, nuclear energy utilization, household appliances and national defense industries, higher requirements are put forward for the types and bonding quality of dissimilar metal composites. It is an effective method to apply a certain temperature, pressure and deformation to the dissimilar metals to make good mechanical and metallurgical compounding at the interface, such as solid-state hot pressing processing such as solid-state forging, extrusion and spinning of dissimilar metals methods can achieve such processing. When dissimilar metals are combined by spinning, at the same tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/16B21D37/16
CPCB21D22/16B21D37/16
Inventor 徐文臣张治朋单德彬黄凯杨川赵小凯靳学泽
Owner HARBIN INST OF TECH