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Method of preparing titanium steel composite liquid route connecting tube of the complex construction connecting surface

A technology with complex structure and manufacturing method, which is applied in the field of manufacturing bimetal composite liquid pipes, can solve problems such as difficulty in realization, difficulty in coating, and limited welding depth of argon arc welding, so as to achieve high-strength diffusion welding, improve connection strength, Effect of increasing solder contact area

Inactive Publication Date: 2008-03-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the titanium-steel bimetallic connection with a complex structural connection surface, the traditional welding process is difficult to achieve or cannot guarantee product quality
Since the brazing technology requires that the brazing material is in a molten state during the welding process and it is difficult to coat on the connection surface of the complex structure, it cannot meet the needs of the titanium steel composite liquid pipe, and the welding depth of the argon arc welding is limited, and the connection of the complex structure cannot be realized. surface welding
Ordinary diffusion welding technology can only pressurize in one direction, and it is difficult to ensure the complete combination of the complex structure of titanium steel

Method used

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  • Method of preparing titanium steel composite liquid route connecting tube of the complex construction connecting surface
  • Method of preparing titanium steel composite liquid route connecting tube of the complex construction connecting surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] As shown in Figures 1, 2 and 3, a method for manufacturing a titanium-steel composite liquid pipe connecting surface with a complex structure includes the following steps:

[0013] (1) Add a transition layer on the surface of the steel blank

[0014] The surface of the steel blank 1Cr18Ni9Ti stainless steel 1 is cleaned, and a Ni transition layer is plated on the surface of the steel blank 1Cr18Ni9Ti stainless steel 1 by electroplating.

[0015] The steel blank 1Cr18Ni9Ti stainless steel 1 is a cylinder with a large diameter at both ends and a small diameter in the middle. One end and the middle part are cylinders, and the other end is a tapered cylinder. Increase; the surface of the tapered cylinder of 1Cr18Ni9Ti stainless steel 1 is evenly provided with four circles of dovetail grooves along the direction perpendicular to its axis.

[0016] Two criteria for selecting the transition layer metal (a) the value of the linear expansion coefficient of the transition layer ...

Embodiment 2

[0030] The difference with embodiment 1 is that the degree of vacuum in the step (3) is 1 * 10 -2 MPa, the holding time will be sealed and welded after 3 hours; the hot isostatic pressing temperature in step (4) is 850° C., the pressure is 105 MPa, and the holding time is 2.5 hours.

Embodiment 3

[0032] The difference with embodiment 1 is that the degree of vacuum in the step (3) is 4 * 10 -2 MPa, after holding time for 4 hours, it will be sealed and welded; the hot isostatic pressing temperature in step (4) is 950° C., the pressure is 160 MPa, and the holding time is 1 hour.

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Abstract

The present invention provides a method of manufacturing a compound liquid titanium steel nozzle whose joint surface has complicated structure, including procedures as following: (1) a surface of steel blank is provided with a transition layer; (2) the steel blank with the transition layer is put into a mold; (3) titanium alloy powder is arranged between the mold and the steel blank and the mold is sealed; (4) not isostatic pressing treatment for the sealed mold is practiced; (5) a blank of compound liquid titanium steel nozzle is taken out and made into the compound liquid titanium steel nozzle. The present invention adopts method of electroplate or ion plating to form a form a transition layer on the steel surface that is made up of Cu, Ni, Cr, Mo, and V, which not only increases contact area for titanium and steel but also forms a mechanical lock, thus, further improving joint strength of two metals mentioned-above. The present invention makes use of powder flowability of TC4 titanium alloy to realize that two metals can fully contact with each other at any complicated joint surface.

Description

technical field [0001] The invention belongs to the field of manufacturing methods of bimetallic composite fluid path connecting pipes, in particular to a manufacturing method for titanium steel composite liquid path connecting pipes. Background technique [0002] The connection of titanium-steel bimetal can be realized by diffusion welding, brazing, argon arc welding and other technologies, which are often used to weld flat products. In order to realize the titanium-steel bimetal connection with complex structural connection surface, the traditional welding process is difficult to realize or cannot guarantee the product quality. Since the brazing technology requires that the brazing material is in a molten state during the welding process and it is difficult to coat on the connection surface of complex structures, it cannot meet the needs of titanium steel composite liquid pipes, and the welding depth of argon arc welding is limited, and complex structure connections cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/08
Inventor 王亮郎泽保
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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