Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal and preparation method thereof

A technology of alloy solder, ti-zr-cu-co-fe, applied in the direction of metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of low Cu content, reduce the strength of brazing joints, etc., and achieve low Cu content , Improve mechanical properties, avoid damage

Active Publication Date: 2017-05-31
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the Ti-Ni brittle phase is generated due to the high Ni element content in the existing titanium-zirconium-based solder, and because the Ti-Ni brittle phase reduces the strength of the brazed joint, the present invention designs a Ni-free and low Cu content, Ti-Zr-Cu-Co-Fe Alloy Filler with Low Melting Point, Good Brazed Joint Performance and Low Cost

Method used

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  • Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal and preparation method thereof
  • Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal and preparation method thereof
  • Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The target composition is: 37.81 wt% Ti, 43.23 wt% Zr, 8.03 wt% Cu, 6.52 wt% Co and 4.41 wt% Fe. Converted to atomic percent expressed as Ti 50 Zr 30 Cu 8 co 7 Fe 5 .

[0056] Preparation of Ti by Melt Spin Quenching 50 Zr 30 Cu 8 co 7 Fe 5 The steps of alloy solder are:

[0057] Step 1, weigh each element

[0058] According to the target solder composition Ti 50 Zr 30 Cu 8 co 7 Fe 5 Weigh the metal elemental Ti, Zr, Cu, Co and Fe raw materials of corresponding quality for batching;

[0059] Step 2, melting the master alloy

[0060] Ti prepared in step 1 50 Zr 30 Cu 8 co 7 Fe 5 The raw materials are put into the vacuum arc melting furnace; the vacuum is pumped to make the vacuum degree in the furnace reach 8×10 -3 Pa; filled with argon, so that the pressure in the furnace is 0.05MPa; repeated smelting by arc heating for 4 times to ensure that the alloy composition is uniform, then cooled with the furnace, and the master alloy was taken out;

[00...

Embodiment 2

[0096] Target composition (wt%): Ti 33.03%, Zr 48.95%, Cu 3.90%, Co 8.13%, Fe 5.99%, converted to atomic percentage expressed as Ti 45 Zr 35 Cu 4 co 9 Fe 7 (at%).

[0097] Preparation of Ti by Melt Spin Quenching 45 Zr 35 Cu 4 co 9 Fe 7 The steps of alloy solder are:

[0098] Step 1, weigh each element

[0099] According to the target solder composition Ti 45 Zr 35 Cu 4 co 9 Fe 7 Weigh the metal elemental raw materials of corresponding quality for batching;

[0100] Step 2, melting the master alloy

[0101] Put the raw materials weighed in step 1 into the vacuum arc melting furnace; pump the vacuum to make the vacuum degree in the furnace reach 5×10 - 3 Pa; filled with argon, so that the pressure in the furnace is 0.05MPa; repeated smelting by arc heating for 5 times to ensure that the alloy composition is uniform, then cooled with the furnace, and the master alloy was taken out;

[0102] Vacuum arc melting parameters: electrode diameter 6mm, arc ignition vo...

Embodiment 2

[0108] Make the performance analysis of embodiment 2 alloy solder:

[0109] Depend on figure 1 From the XRD pattern shown, it can be seen that the thin strip of Example 2 prepared by the above method shows a single diffuse scattering peak through X-ray diffraction detection, and there is no obvious crystal diffraction peak, and it can be preliminarily determined to have an amorphous structure.

[0110] image 3 The displayed DSC curve represents the thermal performance of the amorphous alloy thin strip tested by a differential calorimetry scanner. It can be known that the solder liquidus temperature in Example 2 is 899°C.

[0111] The performance test of the brazed joint of embodiment 2:

[0112]The Ni-free alloy strip solder of embodiment 2 is brazed Ti in vacuum brazing furnace 3 Al (Ti-14Al-27Nbwt%), make a 30mm×10mm×2mm sample for vacuum brazing. The sample is polished with sandpaper from 60# to 2000#, and then ultrasonically cleaned with acetone and alcohol for brazin...

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Abstract

The invention discloses Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal and a preparation method of the Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal. The brazing filler metal comprises 2-14wt% of Cu, 3-13wt% of Co, 1-9wt% of Fe and 35-50wt% of Zr and the balance Ti. The amorphous or amorphous / nanocrystalline thin-belt-shaped alloy brazing filler metal with the thickness being 20-60 micrometers is obtained through a melt rotary quenching method. Compared with existing titanium-based brazing filler metal or titanium and zirconium-shaped brazing filler metal, the brazing filler metal contains no Ni element, so that production of a fragile Ti-Ni intermetallic compound in a brazed joint is completely eradicated, the Cu content is not higher than 14wt%, the melting point is low, and the Ni-free low-Cu Ti-Zr-Cu-Co-Fe alloy brazing filler metal has the advantages that a brazed joint is good in performance, high in reliability and the like, and is applicable to welding of titanium alloy and titanium aluminide intermetallic compounds, steel, ceramic and other special materials.

Description

technical field [0001] The invention belongs to the field of brazing materials, and specifically discloses a Ni-free and low-Cu Ti-Zr-Cu-Co-Fe alloy solder and a preparation method thereof. Background technique [0002] Brazing is a precision connection technology in today's high technology. Among the many factors that determine the quality of brazing, solder plays an important role. In the field of aerospace, titanium alloys have been widely used as lightweight metal materials with better performance, and some of their components are used in the form of brazed joints. Titanium-based brazing filler metals are commonly used for titanium alloy connections, because their brazed joints have good high-temperature strength and corrosion resistance, and are ideal for titanium alloy brazing filler metals. However, since the brazing temperature of titanium alloy needs to be lower than its β transformation temperature, more Cu and Ni elements (generally ≥ 20wt%) are added in order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/40
CPCB23K35/325B23K35/40
Inventor 逄淑杰张涛司艳孙璐璐
Owner BEIHANG UNIV
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