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Diffusion welding method and weldment

A technology of diffusion welding and weldments, which is applied in the field of diffusion welding and weldments, can solve the problems of high temperature, achieve the effects of improving efficiency, improving channel flow resistance, increasing elongation and plasticity index

Inactive Publication Date: 2012-05-09
北京智创联合科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of high temperature required by existing diffusion welding, the present invention provides a diffusion welding method and weldment

Method used

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  • Diffusion welding method and weldment
  • Diffusion welding method and weldment

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Embodiment 1

[0020] Embodiment 1: This embodiment is to use steel flanges and steel annular thin plate blanks to manufacture steel diaphragm boxes. The outer shape and inner shape of the diaphragm box are circular, the inner shape size is φ50mm, and the outer dimension is φ100mm. The final width of the inner weld land 13 is 1 mm and the final width of the outer seam land 12 is 1 mm. The material of the upper and lower flanges is superalloy GH4169 with a thickness of 10mm, the material of the annular thin plate is superalloy GH4169 with a thickness of 0.2mm, and the number of annular thin plate blanks is 30 pieces.

[0021] The method flow of this embodiment is as follows figure 1 shown, including the following steps:

[0022] Step 101: use a lathe to process 30 annular thin plate blanks 3 with an inner diameter of φ40mm, an outer diameter of φ110mm, and a thickness of 0.2mm.

[0023] Step 102: Use a lathe to process one ring-shaped upper flange blank 2 and one ring-shaped lower flange bl...

Embodiment 2

[0045] Embodiment 2: In this embodiment, a steel diaphragm box is manufactured by using a steel flange and a steel annular thin plate blank. 100mm, the fillet of the inner shape is R10, the final width of the inner and outer welds is 2mm, the material of the upper and lower flanges is structural steel 30Cr3MoA, the thickness is 20mm, the sheet material is stainless steel 1Cr18Ni9Ti, the thickness is 0.1mm, the sheet Manufacture of capsules in quantities of 100 pieces.

[0046] Step 201: use the CNC machining center to process 100 square annular sheet blanks with an inner dimension of 40mm×40mm, an outer dimension of 110mm×110mm, inner and outer rounded corners of R10, stainless steel 1Cr18Ni9Ti, and a thickness of 0.1mm.

[0047] Step 202: use the numerical control machining center to process the square annular upper flange blank and square ring with an inner dimension of 40mm × 40mm, an outer dimension of 110mm × 110mm, an inner and outer fillet of R10, a material of structur...

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Abstract

The invention relates to the technical field of press welding in mechanical engineering, in particular to a diffusion welding method and a weldment, which are used for solving the problem of high temperature required by diffusion welding in the prior art, providing a novel solution for researching and developing regenerative cooling body parts of space rockets, missile engine diaphragm capsules and rocket thrust chambers, prolonging the fatigue life of the regenerative cooling body parts of the engine diaphragm capsules and the thrust chambers, and enhancing the strength and reliability of the regenerative cooling body parts. The surface of the weldment is plated with a nickel coating which contains nickel and phosphorus. The diffusion welding method provided by the invention comprises the following steps of: tightly jointing the nickel coatings on the surfaces of two weldments; and performing diffusion welding on the two jointed weldments. In the scheme, the nickel coatings containing nickel and phosphorus are added, so that the temperature needed by diffusion welding is lowered.

Description

technical field [0001] The invention relates to the technical field of pressure welding in mechanical engineering, in particular to a diffusion welding method and a weldment. Background technique [0002] Diffusion welding is an advanced welding method. It is a welding method that closely fits the weldments and maintains them under a certain temperature and pressure for a period of time, so that the atoms between the contact surfaces diffuse each other to form a joint. The main factors affecting the diffusion welding process and joint quality are temperature, pressure, diffusion time and surface roughness. The higher the welding temperature, the faster the atomic diffusion. According to the material type and the quality requirements of the joint, diffusion welding can be carried out under vacuum or protective gas, among which vacuum diffusion welding is the most widely used. The pressure of diffusion welding is small, and the workpiece does not produce macroscopic plastic d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/02B23K20/24
Inventor 杨建国吴维贵
Owner 北京智创联合科技股份有限公司
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