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Composite soldering material for soldering titanium alloy and ceramic and method for soldering by using same

A technology of composite solder and titanium alloy, which is applied in the direction of welding/welding/cutting articles, welding/cutting media/materials, welding media, etc., which can solve the problem of low joint strength, cracks in welded joints, and reduced wettability of base metals and other problems, to achieve the effect of improving the strength of the joint, good mechanical properties, and reducing the coefficient of thermal expansion

Active Publication Date: 2012-07-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that cracks are easily produced in the welded joints obtained by brazing and connecting titanium alloys and ceramics or ceramic matrix composite materials using existing brazing filler metals, the joint strength is low, and the introduction of ceramic phases in the method of introducing ceramic phases into the brazing filler metals leads to connection problems. The wettability of the layer to the base material is reduced, and a composite brazing filler metal and a brazing method thereof for brazing titanium alloys and ceramics are provided

Method used

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  • Composite soldering material for soldering titanium alloy and ceramic and method for soldering by using same
  • Composite soldering material for soldering titanium alloy and ceramic and method for soldering by using same
  • Composite soldering material for soldering titanium alloy and ceramic and method for soldering by using same

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specific Embodiment approach 1

[0012] Specific Embodiment 1: The composite solder used in this embodiment for brazing titanium alloys and ceramics consists of 30% to 60% Cu powder, 30% to 60% Ni powder and 0.5% to 35% reinforcing phase by weight. Composition, the reinforcement phase is TiB 2 powder or SiC powder.

[0013] In the composite solder of the present embodiment, Cu and Ni can dissolve the Ti element, and it is easy to form a reaction layer on the side of the ceramic or ceramic matrix composite material, and at the same time, the reinforcing particles (TiB 2 Or SiC) reacts with Ti elements to generate reinforcing particles in situ, reduce stress, pin grain boundaries, and increase strength.

specific Embodiment approach 2

[0014] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the composite solder used for titanium alloy and ceramic brazing consists of 40% to 50% Cu powder, 40% to 50% Ni powder and 1% to 10% reinforcement phase composition, the reinforcement phase is TiB 2 powder or SiC powder. Other parameters are the same as in the first embodiment.

[0015] The composition of the composite brazing filler metal of this embodiment is more preferable.

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the composite solder for titanium alloy and ceramic brazing consists of 48.5% Cu powder, 48.5% Ni powder and 3% TiB by weight percentage 2 powder composition. Other parameters are the same as in the first embodiment.

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Abstract

The invention discloses a composite soldering material for soldering a titanium alloy and a ceramic and a method for soldering by using the same, and solves the problems that a welding joint obtained by soldering the titanium alloy and the ceramic or the ceramic matrix composition material through the conventional soldering material is easy to crack and has low strength, and the introduction of a ceramic phase in a method of introducing the ceramic phase into the soldering material causes reduction of wettability of a connecting layer for a base metal. The composite soldering material consists of Cu, Ni and a reinforced phase, wherein the reinforced phase is TiB2 powder or SiC powder. The method comprises the following steps of: performing ball milling on the Cu, Ni and TiB2 or SiC powder, uniformly mixing, and coating to-be-welded surfaces of the titanium alloy and the ceramic to obtain to-be-welded parts; and putting the to-be-welded parts into a vacuum brazing furnace for vacuum brazing treatment. In the soldering process, the composite soldering material has good wettability for the ceramic and ceramic materials, and the obtained welding joint has no crack, the shear strength between 16 and 45MPa, and good mechanical properties.

Description

technical field [0001] The invention relates to a composite solder and a brazing method for metal and ceramic brazing. Background technique [0002] The connection between ceramics and metals can overcome the inherent brittleness of ceramic materials, difficulty in sintering, and difficulty in preparing large-scale and complex components, and can obtain composite components with both excellent performances of ceramics and metal materials. Therefore, high thrust-to-weight ratio in the future Aviation engines, satellite attitude control engines, hypersonic ramjet engines, cruise missile engines, liquid and solid rocket engines and other weapons and equipment fields have broad prospects for promotion and application. Titanium alloy materials with excellent comprehensive properties such as high specific strength, corrosion resistance, and high temperature resistance are important materials for manufacturing aeroengines and aircraft body structural parts. Therefore, the connectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K1/008B23K103/16
Inventor 何鹏林铁松黄超
Owner HARBIN INST OF TECH
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