A kind of magnesium alloy solder containing rare earth element Er and preparation method thereof

A rare earth element and magnesium alloy technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of magnesium alloy brazing filler metal segregation, uneven distribution of trace elements, etc., and achieve improved shear strength and grain refinement. , the effect of uniform distribution

Inactive Publication Date: 2011-12-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a Mg-Zn-Al-Er magnesium alloy brazing material with the addition of rare earth element Er. At the same time, by applying ultrasonic waves in the alloy ingot melt, the serious segregation of the magnesium alloy brazing filler metal prepared in the crucible and the problem of crystal grains are solved. To solve the problem of uneven distribution of coarse and trace elements in the solder, a Mg-Zn-Al-Er based solder with fine grains and uniform distribution of trace elements Er was prepared

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preheat the crucible to 100 °C. Put into 270g magnesium ingots, 295g zinc ingots, 15g aluminum ingots, 28g magnesium-erbium alloy ingots in the crucible. The erbium content of the magnesium-erbium alloy ingot is 30%. Heating to 700°C under protective atmosphere and mechanical stirring conditions and then keeping it warm. After the alloy is completely melted, remove the slag, stir for 2 minutes and then cool down. After the melt temperature drops to 600°C, keep it warm. Insert the ultrasonic rod preheated to 300°C into the molten magnesium alloy solder, and immerse the ultrasonic rod about 5mm below the alloy liquid surface. , and then apply ultrasonic waves, the ultrasonic frequency is 18kHz, and the ultrasonic intensity is 0.5W / cm 2 , the time is 10s. After the treatment, the ultrasonic rod was removed, the alloy liquid was left to stand for 5s, and cast in a stainless steel mold at a casting temperature of 600°C. SF was used throughout the process 6 +N 2 The mix...

Embodiment 2

[0032] Preheat the crucible to 150 °C. Put into 260g magnesium ingot and 320g zinc ingot, 15g aluminum ingot, 28g magnesium-erbium alloy ingot in crucible. The erbium content of the magnesium-erbium alloy ingot is 30%. Heating to 650°C under protective atmosphere and mechanical stirring conditions and then keeping it warm. Remove the slag after the alloy is completely melted, cool down after stirring for 4 minutes, keep the melt temperature down to 550°C and keep it warm, insert the ultrasonic rod preheated to 500°C into the molten magnesium alloy solder, and immerse the ultrasonic rod about 20mm below the alloy liquid surface , and then apply ultrasonic waves, the ultrasonic frequency is 20kHz, and the ultrasonic intensity is 1W / cm 2 , the time is 20s. After the treatment, remove the ultrasonic rod, let the alloy solution stand for 40s, and cast it in a stainless steel mold at a casting temperature of 550°C. SF was used throughout the process 6 +N 2The mixed gas protect...

Embodiment 3

[0034] Preheat the crucible to 180 °C. Put into 240g magnesium ingot, 340g zinc ingot, 20g aluminum ingot, 40g magnesium-erbium alloy ingot in crucible. The erbium content of the magnesium-erbium alloy ingot is 30%. Heating to 650°C under protective atmosphere and mechanical stirring conditions and then keeping it warm. Remove the slag after the alloy is completely melted, cool down after stirring for 4 minutes, keep the melt temperature down to 550°C and keep it warm, insert the ultrasonic rod preheated to 550°C into the molten magnesium alloy solder, and immerse the ultrasonic rod about 20mm below the alloy liquid surface , and then apply ultrasonic waves, the ultrasonic frequency is 20kHz, and the ultrasonic intensity is 1W / cm 2 , the time is 40s. After the treatment, remove the ultrasonic rod, let the alloy solution stand for 30s, and cast it in a stainless steel mold at a casting temperature of 550°C. SF was used throughout the process 6 +N 2 The mixed gas protects ...

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PUM

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Abstract

The invention relates to a magnesium alloy brazing filler metal containing a rare-earth element Er and a preparation method thereof, and belongs to the technical field of magnesium alloy connection. The magnesium alloy brazing filler metal comprises the following components in percentage by weight: 40-55% of Mg, 39-55% of Zn, 1-5% of Al and 0.1-1.5% of Er, wherein the Er is uniformly distributed.The preparation method comprises the steps of arranging alloy ingots in a preheat crucible, heating under protective atmosphere and mechanical stirring, fishing slag after the alloy ingots are completely fused, stopping heating brazing filler metal, stirring the brazing filler metal, applying ultrasonic waves on the fused brazing filler metal after the brazing filler metal is cooled to 380-600 DEG C, inserting an ultrasonic rod preheated to 300-700 DEG C into a brazing filler metal liquid level with the ultrasonic frequency of 18-22kHz, ultrasonic intensity of 0.5-5W/cm2 and the time of 10-150s, standing still after moving out the ultrasonic rod after ending, pouring the brazing filler metal liquid into a mould and air cooling to room temperature. The number of dendritic crystals of the obtained product is obviously reduced, crystal grains are refined, and the strength and the toughness are improved.

Description

technical field [0001] The invention relates to a Mg-Al-Zn-Er magnesium alloy solder containing rare earth element Er and a preparation technology thereof, belonging to the technical field of magnesium alloy connection. Background technique [0002] Since the early 1990s, the application and development of major metal materials in the world have undergone significant changes. The application of traditional materials such as steel, iron, copper, aluminum, and zinc has grown slowly, while light metal materials represented by magnesium alloys have sprung up suddenly. The annual rate of 20% continues to grow. Countries around the world attach great importance to the research and development of magnesium alloys, regard magnesium resources as an important strategic material in the 21st century, and strengthen the application development and research of magnesium alloys in the fields of automobiles, computers, communications, and aerospace. Therefore, more and more attention has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24C22C23/04C22C18/00C22C30/06
Inventor 李国栋栗卓新高丽脂许有木闫鑫
Owner BEIJING UNIV OF TECH
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