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Solder

A brazing material, weight percentage technology, applied in the direction of welding/cutting medium/material, welding medium, metal processing equipment, etc., can solve the problems of low joint strength, grain growth, high joint strength, etc., and achieve brazing quality and stability , The preparation method is simple, and the effect of brazing seam is good

Inactive Publication Date: 2009-05-27
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using existing nickel-based, silver-based or titanium-based brazing filler metals, Ti 3 The wettability and seam filling properties of Al-based alloy and GH536 alloy joints are not ideal, and the strength of brazed joints is low, which cannot meet the requirements of use
Nickel-based solder has a high melting point, which is easy to cause Ti 3 The Al-based alloy grain grows, and the nickel-based solder has a good effect on Ti 3 Al-based alloy has poor wettability and low joint strength; silver-based solder has a suitable melting point, and the brazing joint has good plasticity, but its mechanical properties, high temperature resistance and oxidation resistance are poor; titanium-based solder has high joint strength, Good corrosion resistance and heat resistance, but poor wettability to GH536 alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Using the atomization powder making process, first mix metal Ti, Cu, Ni and Cr, the composition of the mixed material is Ti45%, Cu30%, Ni15%, Cr10%; the mixed material is smelted into an alloy under vacuum-argon gas conditions Ingot, and then prepare powder on high-pressure gas-water atomization equipment, use high-pressure argon gas atomization, and the alloy liquid after atomization is dropped into the cooling water environment to obtain a mixture of alloy powder and water, and then the alloy powder and water The mixture is subjected to suction filtration, vacuum drying and sieving to obtain titanium-based powder solder; the particle size is -150 to -300 mesh.

[0012] Carry out wettability test to this solder, test result is as follows figure 1 shown.

[0013] Coated with this solder on Ti 3 The brazing joint between Al-based alloy and GH536 alloy is brazed under vacuum conditions. After brazing, the brazing material fills the gap at the brazing joint, the brazing ...

Embodiment 2

[0016] Using the atomization powder making process, firstly mix the metals Ti, Cu, Ni and Cr, the composition of the mixed material is Ti55%, Cu20%, Ni10%, Cr15%; the mixed material is smelted into alloy under the condition of vacuum-argon gas Ingot, and then prepare powder on high-pressure gas-water atomization equipment, use high-pressure argon gas atomization, and the alloy liquid after atomization is dropped into the cooling water environment to obtain a mixture of alloy powder and water, and then the alloy powder and water The mixture is subjected to suction filtration, vacuum drying and sieving to obtain titanium-based powder solder; the particle size is -150 to -300 mesh.

[0017] Coated with this solder on Ti 3 The brazing joint between Al-based alloy and GH536 alloy is brazed under vacuum conditions. After brazing, the brazing material fills the gap at the brazing joint, the brazing seam is well formed, and the brazing quality is excellent and stable; the base metal a...

Embodiment 3

[0020] Using the atomization powder making process, first mix metal Ti, Cu, Ni and Cr, the composition of the mixture is Ti70%, Cu15%, Ni7%, Cr8%; the mixture is smelted into an alloy under vacuum-argon gas conditions Ingot, and then prepare powder on high-pressure gas-water atomization equipment, use high-pressure argon gas atomization, and the alloy liquid after atomization is dropped into the cooling water environment to obtain a mixture of alloy powder and water, and then the alloy powder and water The mixture is subjected to suction filtration, vacuum drying and sieving to obtain titanium-based powder solder; the particle size is -150 to -300 mesh.

[0021] The brazing material is coated on the brazing joint of Ti3Al-based alloy and GH536 alloy, and brazed under vacuum conditions. After brazing, the brazing material fills the gap at the brazing joint, the brazing seam is well formed, and the brazing quality is excellent and stable. ; The interface between the base metal a...

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Abstract

The invention relates to a brazing alloy, pertaining to the technical field of welding. The brazing alloy comprises the following components by the weight percentage: 40-80% of Ti, 10-35% of Cu, 5-20% of Ni and 5-15% of Cr. The brazing alloy of the invention can be coated at the joint of braze welding of Ti3Al-base alloy and GH536 alloy; braze welding is carried out under vacuum condition; after the braze welding, the brazing alloy is used for filling the clearance at the joint of braze welding so as to mould the brazing seam excellently and control the quality of the braze welding to be excellent and steady. The interface connecting parent material and the brazing alloy is tightly integrated that no defect, such as pore and crack, exists; therefore, the interface is excellently organized.

Description

technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a solder. Background technique [0002] With the continuous development of aero-engines, in order to meet the requirements of high-performance engines, many engine components use new materials, Ti 3 Al-based alloys are one of them. Ti 3 Al-based alloys have good high-temperature resistance at high temperatures (800-850°C), have low density, and can reduce engine weight by 40% compared with nickel-based superalloys, so they can be used in new engines. Ti currently 3 One of the applications of Al-based alloys in engines is the honeycomb sealing structure, that is, the Ti 3 Al-based alloy and GH536 honeycomb are connected together. Ti 3 Brazing research on Al-based alloys is not very common, for Ti 3 The brazing connection of Al-based alloys and superalloys has not been reported. [0003] Using existing nickel-based, silver-based or titanium-based brazing filler ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32
Inventor 杜静康惠曲伸曲萍孔庆吉桓恒金莹杨烁张磊先
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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