Silver base alloy/copper/silver base alloy layered composite brazing material

A silver-based alloy, layered composite technology, applied in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of cumbersome operation, difficult process, unstable joint strength, etc., to simplify process operation, The effect of high mechanical strength and good wettability

Inactive Publication Date: 2005-03-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high melting point of copper-based brazing material, and the high stress after brazing with steel, expansion alloy, and hard alloy at 850°C-1000°C, it becomes the cause of cracks in expansion alloys and hard alloys; silver-based brazing The melting point of the solder is low, and the thermal stress gener

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Example 1

[0012] According to the nominal composition of the silver-based alloy, it is smelted into an ingot by a power frequency induction furnace. The weight percentage of the alloy is Cu: 16%, Zn: 16%, Cd: 18%, and the balance is Ag and inevitable trace impurities. The weight content of the copper in the middle layer is 99.95% and unavoidable impurities. The prepared silver-based alloy is processed into a plate, and after the explosive compounding of the silver-based alloy and the copper plate, it is processed into a 0.5mm strip with a thickness ratio of 1 ∶2∶1, using conventional methods to braze alloy steel and cemented carbide base metal, it has good wettability on the base metal, good flowability, and spreading area of ​​370mm 2 , Σ b Up to 362MPa.

Example Embodiment

[0013] Example 2

[0014] According to the nominal ingredients of the silver-based alloy, it is smelted into an ingot by a power frequency induction furnace. The weight percentage of the alloy is Cu: 17%, Zn: 18%, Cd: 25%, and the balance is Ag and inevitable trace impurities. The weight content of the copper in the middle layer is 99.95% and unavoidable impurities. The prepared silver-based alloy is processed into a plate, and after the explosive compounding of the silver-based alloy and the copper plate, it is processed into a 0.8mm strip with a thickness ratio of 1:2 :1. Using conventional methods to braze alloy steel and expansion alloy base material, it has good wettability on the base material, good flowability, and spreading area of ​​380mm 2 , Σ b Up to 384MPa.

Example Embodiment

[0015] Example 3

[0016] According to the nominal ingredients of the silver-based alloy, it is smelted into an ingot by a power frequency induction furnace. The weight percentage of the alloy is Cu: 20%, Zn: 15%, Cd: 20%, and the balance is Ag and inevitable trace impurities. The weight content of the copper in the middle layer is 99.95% and unavoidable impurities. The prepared silver-based alloy is processed into a sheet, and after explosive compounding of the silver-based alloy and the copper plate, it is processed into a 1.0mm strip with a thickness ratio of 1:2 :1. Using conventional methods to braze alloy steel and expansion alloy base material, it has good wettability on the base material, good flowability, and spreading area of ​​380mm 2 , Σ b Up to 402MPa.

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Abstract

The present invention relates to one kind of brazing material for steel, expansion alloy and hard alloy base material used in cold and heat chock load environment. The brazing material is laminated composite brazing material with metallurgically combined upper silver base alloy sheet, middle copper sheet and lower silver base alloy sheet in the thickness ratio of 1 to 2 to 1. Owing to the outer silver base alloy layers in the melting point of 590-660 deg.c, the brazing material has excellent wetting performance to steel, expansion alloy and hard alloy and high welding mechanism strength. In addition, the metallurgic combination of brazing material facilitates the welding operation.

Description

technical field [0001] A silver-based alloy / copper / silver-based alloy layered composite brazing material, relating to a metal welding, especially for the use environment to withstand cold and heat shock loads with steel, expansion alloy, hard alloy as the base material Brazing silver-based alloy / copper / silver-based alloy layered brazing material. Background technique [0002] At present, the welding methods of steel, expansion alloy and hard alloy under the environment of hot and cold impact load mainly adopt silver-based brazing material, copper-based brazing material and layered brazing material with copper sheet sandwiched between silver-based brazing material. solder. Due to the high melting point of copper-based brazing material, and the high stress after brazing with steel, expansion alloy, and hard alloy at 850°C-1000°C, it becomes the cause of cracks in expansion alloys and hard alloys; silver-based brazing The melting point of the solder is low, and the thermal st...

Claims

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Application Information

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IPC IPC(8): B23K35/14B23K35/24
Inventor 柏文超李明利马蕊侠杜平李银娥王轶
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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