A connection structure and brazing method for welding titanium and copper by using multi-intermediate brazing filler metal

A technology for connecting structures and intermediate layers, which is applied in welding/welding/cutting items, welding equipment, manufacturing tools, etc., and can solve problems such as high cost and complicated process

Active Publication Date: 2022-07-08
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to prepare a diffusion barrier layer on the titanium surface by methods such as sputtering or coating, and the process is complicated and the cost is high.

Method used

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  • A connection structure and brazing method for welding titanium and copper by using multi-intermediate brazing filler metal
  • A connection structure and brazing method for welding titanium and copper by using multi-intermediate brazing filler metal
  • A connection structure and brazing method for welding titanium and copper by using multi-intermediate brazing filler metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: see figure 1 , a connection structure for welding titanium and copper using multi-intermediate brazing filler metal, including titanium base material and copper base material, a multi-intermediate layer structure is arranged between the surfaces to be welded between the titanium base material and the copper base material, and the multi-intermediate layer structure Including solder 1 and solder 2, a refractory metal intermediate layer is arranged between the solder 1 and the solder 2, and the refractory metal interlayer does not melt within the brazing temperature range; the solder 1 is located between the titanium base material and the titanium base material. Between the refractory metal intermediate layers, and melting at the brazing temperature to achieve diffusion brazing connection; the brazing filler metal 2 is located between the refractory metal intermediate layer and the copper base material, and melted at the brazing temperature to achieve active braz...

specific Embodiment approach

[0053] The specific implementation is as follows, the copper base material is T2 pure copper square bar, the size is 20 × 20 × 35 mm 3 ; Titanium base material is TA2 industrial pure titanium square bar, its size is 20 × 20 × 35 mm 3 .

[0054] Solder 1 is amorphous Ti-26Zr-26Ni with a melting point of 850°C and a thickness of 30 microns; solder 2 is Ag-36.5Cu-1.5Ti active solder with a melting point of 830°C and a thickness of 100 microns; refractory The metal intermediate layer is made of molybdenum, and the molybdenum intermediate layer is pure molybdenum foil with a thickness of 30 microns.

[0055] In the embodiment 1, a brazing method for welding titanium and copper using multi-intermediate brazing filler metal, comprising the following steps:

[0056] Step 1: Pretreatment of the titanium base metal and copper base metal to be welded

[0057] Wire cutting was used to cut samples with a length of 35 mm from TA2 industrial pure titanium square bars and T2 pure copper sq...

Embodiment 2

[0070] Example 2: The difference from Example 1 is that the size of the copper base material is 20×20×35 mm 3 The T2 pure copper square bar; the titanium base material adopts the size of 20 × 20 × 35 mm 3 TA2 industrial pure titanium square bar; solder 1 uses amorphous Zr-24Ti-16Ni-10Cu with a melting point of 790°C and a thickness of 30 microns; solder 2 uses Ag-28Cu with a melting point of 800°C and a thickness of 100 microns -2Ti active brazing filler metal; while the refractory metal interlayer adopts a niobium interlayer with a thickness of 30 microns, and the niobium interlayer is a pure niobium foil.

[0071] In the embodiment 2, a brazing method for welding titanium and copper using multi-intermediate brazing filler metal, comprising the following steps:

[0072] Step 1: Pretreatment of the titanium base metal and copper base metal to be welded

[0073] Wire cutting was used to cut samples with a length of 35 mm from TA2 industrial pure titanium square bars and T2 p...

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Abstract

The invention discloses a connection structure for welding titanium and copper by using multi-intermediate layer brazing material, which comprises a titanium base material and a copper base material. The structure of the intermediate layer includes a brazing filler metal 1 and a brazing filler metal 2. A refractory metal intermediate layer is arranged between the brazing filler metal 1 and the brazing filler metal 2, and the refractory metal intermediate layer does not melt within the brazing temperature range; the brazing filler metal 1 is located in the titanium base metal. Between the interlayer of the refractory metal and melting at the brazing temperature to realize the diffusion brazing connection; the brazing filler metal 2 is located between the interlayer of the refractory metal and the copper base material, and melts at the brazing temperature to realize the active brazing connection The brazing method comprises the following steps: pre-treatment of the surfaces to be welded of titanium base material and copper base material; pre-treatment of multi-intermediate layer materials; assembly of brazed components; brazing in furnace; solving joints in conventional titanium-copper welding The problem of generating a large amount of brittle intermetallic compounds at the interface leads to a titanium-copper joint without brittle interface reaction products.

Description

technical field [0001] The invention relates to the technical field of dissimilar metal connection, in particular to a connection structure and a brazing method for welding titanium and copper by using multi-intermediate brazing filler metals. Background technique [0002] Due to their excellent mechanical properties, high specific strength and excellent corrosion resistance, titanium and titanium alloys are the preferred structural materials in the fields of aerospace, nuclear power generation and chemical machinery. Other conventional alloy materials have clear performance advantages. Therefore, the composite components made by connecting titanium and copper can not only fully exploit the performance advantages of the two materials and meet the performance requirements of different working conditions, but also reduce the amount of expensive titanium materials and reduce the cost of components, which has broad engineering application prospects. [0003] However, the key di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K33/00B23K1/008B23K1/20
CPCB23K33/00B23K1/008B23K1/20B23K1/206B23K2103/12B23K2103/14
Inventor 甘树德邓永强甘琳巧高焕方栾博语王鸿罗鉴益
Owner CHONGQING UNIV OF TECH
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