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Isolating method for hot isostatic pressing diffusion welding

A hot isostatic pressing diffusion and special-shaped technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as welding defects, unusable isolation materials, and fragility, so as to improve quality, eliminate welding defects, Realize the effect of mass production

Active Publication Date: 2013-06-26
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the welding of simple flat weldments, ceramic slurry can be used as an isolation material after brushing and drying, or thin mica sheets can be used as an isolation material, but these materials have a disadvantage that they are fragile and easily enter the welding interface to form a weld defect
In flat plate welding, the welding defects can be reduced through careful operation, but in the welding of special-shaped structures, such as porous rotors, it is inevitable that a large amount of dust generated by the isolation material will enter the welding interface, so these fragile, Unclean isolation materials cannot be used in hot isostatic diffusion welding of special-shaped structure weldments
At present, there is no suitable isolation method to solve this key process problem of hot isostatic pressure diffusion welding of special-shaped structures

Method used

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  • Isolating method for hot isostatic pressing diffusion welding
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  • Isolating method for hot isostatic pressing diffusion welding

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 with figure 2 As shown, the special-shaped copper-steel bimetal assembly to be welded is composed of a steel cylinder 3, five copper cylinders 1 and a copper plate 2. Among them, there are 5 cylindrical grooves along the circumference in the steel cylinder 3, and the 5 copper cylinders 1 are respectively placed in the 5 grooves of the steel cylinder 3, and the steel cylinder 3 is placed on the copper plate 2 that matches its shape. .

[0021] The concrete steps of a kind of isolation method of hot isostatic pressure diffusion welding described in the present invention are as follows:

[0022] (1) if image 3 As shown, the first special-shaped structure copper-steel bimetallic assembly 4, the second special-shaped structure copper-steel bimetallic assembly 5 and the third special-shaped structure copper-steel bimetallic assembly 6 are stacked up and down in the sheath 9, and in An oxidized stainless steel sheet 2 10 is set between the first special-...

Embodiment 2

[0028] Such as Figure 4 As shown, the special-shaped copper-steel bimetal assembly to be welded is composed of a steel cylinder 3 and five copper cylinders 1 . Among them, five cylindrical grooves are formed along the circumference in the steel cylinder 3 , and the five copper cylinders 1 are respectively placed in the five grooves of the steel cylinder 3 .

[0029] The concrete steps of a kind of isolation method of hot isostatic pressure diffusion welding described in the present invention are as follows:

[0030] (1) if Figure 5 As shown, four special-shaped structure copper-steel bimetal assemblies are stacked up and down in the sheath 9, and a copper-steel bimetal assembly with special-shaped structure is set between the first special-shaped structure copper-steel bimetal assembly and the second special-shaped structure copper-steel bimetal assembly. Layer-isolated oxidized stainless steel sheet 2 10; a layer of isolated oxidized stainless steel sheet 3 is set between...

Embodiment 3

[0036] The difference with Example 1 is:

[0037] The special-shaped structure bimetal assembly to be welded is a special-shaped structure titanium-steel bimetal assembly.

[0038] The heat treatment method is to oxidize the stainless steel sheet. Put the cleaned and dried stainless steel sheet into a heating furnace, keep it at 700°C for 1 hour, and cool down with the furnace to obtain a stainless steel sheet with a stable oxide film on the surface.

[0039] The material of the stainless steel sheet is Cr12, and the thickness is 5mm.

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Abstract

The invention provides an isolating method for hot isostatic pressing diffusion welding. The method comprises the following steps: placing a plurality of specially structured bimetal combined components in a same sheath, and then simultaneously welding in the manner of hot isostatic pressing diffusion welding, and finally removing the sheath, wherein the specially structured bimetal combined components arranged in the same sheath are stacked up and down; a layer of isolated oxidized stainless steel sheet is arranged between every two adjacent specially structured bimetal combined components; a layer of isolated oxidized stainless steel sheet is also arranged between a top cover of the sheath and the upper surface of a top specially structured bimetal combined component; and a layer of isolated oxidized stainless steel sheet is also arranged between a bottom cover of the sheath and the lower surface of a bottom specially structured bimetal combined component. According to the isolatingmethod, the oxidized stainless steel sheets are used as isolating materials for performing the hot isostatic pressing diffusion welding, therefore the separation of welding pieces and the operation of the welding pieces and the sheath can be realized easily after welding under a condition of ensuring welding quality; the completeness of the welding pieces is ensured and the welding quality is improved.

Description

technical field [0001] The invention relates to a welding isolation method, in particular to an isolation method which can be used for various hot isostatic pressure diffusion welding irregular-shaped and flat plate weldments. Background technique [0002] Hot isostatic pressure diffusion welding is suitable for the manufacture of flat plates or special-shaped bimetallic components. In the hot isostatic pressure diffusion welding of special-shaped bimetal parts, the sheath technology is one of the core processes, and the air pressure in the hot isostatic pressing furnace is applied to the weldment through the sheath. However, in the development and production process, in order to maintain the integrity of the weldment, it is necessary to isolate the sheath (or part of the sheath) from the weldment, so that the sheath and the weldment can be easily separated after hot isostatic pressure diffusion welding, and, In order to improve production efficiency and reduce production c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/18
Inventor 王亮郎泽保王锋芦振刚贾文军史金靓许小静
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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