Preparation method of high-entropy alloy brazing filler metal

A technology of high-entropy alloy and brazing filler metal, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of different physical and chemical properties, low quality of welded joints, etc., and achieve good wettability, good mechanical properties, low cost effect

Active Publication Date: 2020-12-11
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When dissimilar materials are welded, there will be a transition layer that is significantly different from the properties and structure of the base metal. This significant difference refers to the difference in physical and chemical properties, resulting in low weld joint quality

Method used

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specific Embodiment approach

[0021] Next, embodiments of the present invention will be described in detail. A method for preparing high entropy alloy solder, said method steps:

[0022] ①, preparation of: Sn, Al, Ag, Cu, Ni and Mg a pure metal or an alloy containing two elements placed in an ultrasonic cleaning device, alcohol and acetone with 3 volume ratio: 1 of cleaning solution, and then dried by the electronic balance after drying the raw material mass percentage weighing standby;

[0023] ②, smelting: ① the ratio of all the raw materials in accordance with good graphite crucible from low to high melting point of the order into a vacuum induction melting furnace, the melting point of the lowest element disposed lowermost, the melting point of the highest element on the most above, the alloy was not more than two thirds of the volume of the volume graphite crucible, not less than one-third; closing the vacuum furnace lid with a vacuum pump to 10 -3 Pa or less, to 20 MPa or into the protective gas; start f...

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Abstract

The invention relates to a preparation method of high-entropy alloy brazing filler metal. The designed high-entropy alloy brazing filler metal comprises the following chemical components of, by mass,20%-25% of Sn, 20%-25% of Al, 20%-25% of Cu, 0%-5% of Ag, 20%-25% of Ni and 0%-5% of Mg. The brazing filler metal used is in the shape of scraps, the brazing filler metal scraps are good in wettability, the strength of a brazing joint is high, the brazing filler metal scraps are prepared through vacuum induction melting, turning and a metal scrap crusher, the preparation process is simple, the production cost is low, the brazing filler metal of different sizes can be produced on a large scale, meanwhile, the quality stability of the brazing filler metal can be guaranteed, and the preparation method has the wide prospect in the aspect of brazing industrial application.

Description

Technical field [0001] The present invention relates to a process for preparing high entropy alloy solder. Background technique [0002] Currently brazing Superalloys, commonly used brazing foil and solder powder, a method for producing such melting, extrusion, drawing gas atomizing method or the like, expensive equipment, complicated methods, the process of high quality, the price is difficult to competition in the market foothold. HE alloys (High-entropy alloys) referred to as HEA, high entropy alloy having a single solid solution structure, a stable structure is good corrosion resistance and high temperature compression performance and good characteristics, typically the body centered cubic (BCC) or a face-centered cubic (FCC) single-phase or multiphase structure. Common metal material such as Al, Ni and Cu face-centered cubic (FCC) structure, will be Al, Ni, and Cu-based, then add some other elements to improve the characteristics, conventionally it is believed that the more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40
CPCB23K35/40
Inventor 孙晓梅陈永生方乃文姜英龙杨昊泉马一鸣
Owner HARBIN WELDING INST LTD
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