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A method for aluminized titanium alloy surface assisted air reaction brazing

A technology of surface aluminization and auxiliary air, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of titanium alloy oxidation, etc., achieve the effect of increasing service temperature, widening temperature range, and inhibiting oxidation phenomenon

Active Publication Date: 2021-03-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of serious oxidation of titanium alloy in the existing ceramic and titanium alloy air reaction brazing connection, and provides a method for assisting air reaction brazing by aluminizing the surface of titanium alloy

Method used

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  • A method for aluminized titanium alloy surface assisted air reaction brazing
  • A method for aluminized titanium alloy surface assisted air reaction brazing
  • A method for aluminized titanium alloy surface assisted air reaction brazing

Examples

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specific Embodiment approach 1

[0019] Specific implementation mode 1: In this implementation mode, the method for aluminizing the surface of titanium alloy to assist air reaction brazing is implemented according to the following steps:

[0020] 1. Mix aluminum powder and binder to form (uniform and viscous) aluminum paste, and evenly coat the aluminum paste on the surface of the metal to be welded, dry it naturally, and place the dried metal to be welded in a vacuum furnace Diffusion, heat preservation treatment at 600-800°C, scrape off the black substance on the surface to be welded after taking it out, and obtain the metal to be welded with aluminized surface after ultrasonic cleaning;

[0021] 2. Press the Ag-CuO solder into a solder sheet, grind the surface of the ceramic to be welded, and perform ultrasonic cleaning to obtain a ceramic workpiece to be welded with surface impurities removed;

[0022] 3. Stack the metal to be welded with aluminized surface, Ag-CuO solder sheet and ceramics to remove surf...

specific Embodiment approach 2

[0026] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the binder described in step 1 is prepared by configuring ethyl cellulose and terpineol according to the mass ratio of 5-10:90-95 .

specific Embodiment approach 3

[0027] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the particle size of the aluminum powder in Step 1 is 5-20 μm.

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Abstract

A method for assisting air reaction brazing by aluminizing the surface of a titanium alloy, the invention relates to the field of connection between a titanium alloy and a ceramic, and aims to solve the problem of serious oxidation of the titanium alloy in the conventional air reaction brazing connection of the ceramic and the titanium alloy. Brazing method: 1. Aluminum powder and binder are mixed and configured to form aluminum paste, which is diffused in vacuum to obtain metal parts to be welded with aluminized surface; 2. Ag-CuO solder is pressed into brazing filler metal sheets; 3. Assemble the parts to be welded 4. Perform air reaction brazing connection under the conditions of brazing temperature of 970-1100°C and holding time of 5-60 minutes, and complete the method of assisting air reaction brazing by aluminizing the surface of titanium alloy. The present invention utilizes the surface aluminizing method to prepare a layer of anti-oxidation coating on the surface of the metal to be welded. The coating has a strong bonding force with the metal substrate. On the one hand, it can inhibit the oxidation of metals, on the other hand, it can combine with solder to form a good interface.

Description

technical field [0001] The invention relates to the field of connection between titanium alloy and ceramics, in particular to a method for aluminized-assisted air reaction brazing on the surface of titanium alloy. Background technique [0002] Titanium and titanium alloys are called "space metals" or "ocean metals" because of their outstanding advantages such as high strength, good corrosion resistance, and high heat resistance. more applications. Ceramic materials are increasingly valued because of their special properties such as high melting point, high temperature resistance, corrosion resistance, and wear resistance, as well as electrical properties such as radiation resistance, high frequency and high voltage insulation. More and more structures require the combined use of titanium alloys and ceramics, so it is necessary to make composite components of ceramics / titanium alloys by connecting methods in practical applications. [0003] At present, the most commonly use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20
CPCB23K1/008B23K1/20B23K1/203B23K1/206
Inventor 司晓庆王晓阳曹健李淳亓钧雷冯吉才
Owner HARBIN INST OF TECH
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