Diffusion-welding connecting method taking Ti foil and titanium-based solder foil as interlayer

A connection method and intermediate layer technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as limited research reports and achieve the effect of optimizing welding parameters

Active Publication Date: 2018-09-04
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the current domestic and foreign research on TiAl alloy and Ti 2 AlNb alloy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Diffusion-welding connecting method taking Ti foil and titanium-based solder foil as interlayer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example one

[0025] This embodiment uses Ti foil and titanium-based solder foil as the intermediate layer of the diffusion welding connection method to connect TiAl alloy and Ti 2 AlNb alloy, the steps of this method are:

[0026] Step 1: Use wire cutting to combine TiAl alloy with Ti 2 AlNb alloy is processed into the required size to obtain the base material to be welded;

[0027] Step 2. After polishing the welded surface of the base material to be welded with sandpaper, perform polishing treatment. The polished base material to be welded, Ti foil with a thickness of 10-50μm and a titanium-based solder foil with a thickness of 30-60μm Put it in acetone and ultrasonically clean for 3~10min;

[0028] The composition system of the titanium-based solder foil includes Ti-Cu-Ni, Ti-Zr-Cu-Ni, Ti-Zr-Cu-Ni-Co(Fe), Ti-Zr-Fe;

[0029] Step three, contact the Ti foil with the surface to be welded of the TiAl alloy, and the titanium-based solder foil and Ti 2 The AlNb alloy is in contact...

Example Embodiment

[0031] Example two

[0032] The difference between this embodiment and the first embodiment is: in step one, the TiAl alloy and Ti 3 The Al-based alloy is processed to the required size. In step 3, the Ti foil is in contact with the surface to be welded of the TiAl alloy, and the titanium-based solder foil is 3 The Al-based alloy is in contact with the surface to be welded, and the resultant structure is Ti 3 Al-based alloy / titanium-based solder foil / Ti foil / TiAl alloy to be welded workpiece. Others are the same as the first embodiment.

Example Embodiment

[0033] Example three

[0034] The difference between this embodiment and the first embodiment is that in step 3, the Ti foil with a thickness of 20-30 μm is ultrasonically cleaned in acetone. Others are the same as the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a diffusion-welding connecting method taking Ti foil and titanium-based solder foil as an interlayer. The method is characterized by comprising the following steps of: processing a TiAl alloy and a Ti2AlNb alloy or a Ti3Al based alloy into needed dimensions; grinding and polishing welded base metal; putting the welded base metal, the Ti foil and the titanium based solder foil into acetone to ultrasonically clean; enabling the Ti foil to be in contact with the TiAl alloy and enabling the titanium based solder foil to be in contact with the Ti2AlNb alloy or the Ti3Al based alloy, thereby forming a welded workpiece of the Ti2AlNb alloy or the Ti3Al based alloy/titanium based solder foil/Ti foil/TiAl alloy; and putting the welded workpiece into a vacuum heating furnace,applying pressure, and completing welding after heating, preserving the heat, cooling and thermally circulating. The diffusion-welding connecting method can control solder residues in a joint, and inhibits forming trend of a continuous brittle reaction layer in the joint, so that the performances of the joint are improved. The obtained joint has room-temperature tensile strength being 510-600 MPa, and has tensile strength being 480 MPa-510 MPa at a high temperature being 650 DEG C.

Description

technical field [0001] The invention relates to a diffusion welding connection method using Ti foil and titanium-based solder foil as an intermediate layer, belonging to the technical field of welding. Background technique [0002] Titanium-aluminum intermetallic compound has the advantages of low density, high specific strength, specific stiffness, good oxidation resistance, good creep resistance and fatigue resistance, and is one of the most promising lightweight high-temperature structural materials for aerospace in the future. one. Among titanium-aluminum intermetallic compounds, TiAl alloys, Ti 2 AlNb alloy or Ti 3 The research on Al-based alloys has been paid attention to, and the working temperature of TiAl alloys can reach 760°C to 850°C. 2 AlNb alloy or Ti 3 The working temperature of Al-based alloys can reach 700°C. Compared with ordinary titanium alloys, TiAl alloys, Ti 2 AlNb alloy or Ti 3 Al-based alloys can serve at higher temperatures; compared with sup...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B23K20/16B23K20/233B23K20/24
CPCB23K20/16B23K20/233B23K20/24
Inventor 任海水熊华平程耀永陈波
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap