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High-entropy alloy composite powder and ultra-high-speed laser cladding method for strengthening magnesium alloy

A technology of laser cladding and high-entropy alloy, applied in the direction of metal material coating process, coating, etc., can solve the problems of strength, hardness and wear resistance, and achieve high material utilization rate, fast cooling rate, high surface high-quality finish

Active Publication Date: 2021-09-28
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a high-entropy alloy composite powder to solve the problem that in the ultra-high-speed laser cladding technology, the molten magnesium alloy is mixed with the cladding powder to dilute the cladding powder to make its strength , hardness and wear resistance are affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0028] Clean the surface of the magnesium alloy substrate, wipe the magnesium alloy substrate with a steel brush, remove the surface scale, and obtain a rough surface, and then put the treated magnesium alloy substrate into an anhydrous ethanol solution for ultrasonic cleaning to remove surface dirt , take out to dry. The specific steps of ultra-high-speed laser cladding strengthening magnesium alloy are as follows:

[0029] (1) Set the process parameters of ultra-high-speed laser cladding: the laser power is 3.5kw, the spot diameter is 0.8mm, the cladding speed is 80 / min, and the multi-pass overlapping rate is 80%;

[0030] (2) Load the cladding powder on the ultra-high-speed laser cladding machine, and send the cladding powder to 0.2 mm above the surface of the magnesium alloy to be treated by means of synchronous powder feeding. Among them, the cladding powder is prepared according to Example 1. The metal powder and WC ceramic particles are weighed with a balance, and the ...

Embodiment 5

[0034] Clean the surface of the magnesium alloy substrate, wipe the magnesium alloy substrate with a steel brush, remove the surface scale, and obtain a rough surface, and then put the treated magnesium alloy substrate into an anhydrous ethanol solution for ultrasonic cleaning to remove surface dirt , take out to dry. The specific steps of ultra-high-speed laser cladding strengthening magnesium alloy are as follows:

[0035] (1) Set the process parameters of ultra-high-speed laser cladding: the laser power is 3.6kw, the spot diameter is 0.9mm, the cladding speed is 120m / min, and the multi-pass overlapping rate is 86%;

[0036](2) Load the cladding powder on the ultra-high-speed laser cladding machine, and send the cladding powder to 0.5mm above the surface of the magnesium alloy to be treated by means of synchronous powder feeding. Among them, the cladding powder was prepared according to Example 2. The metal powder and WC ceramic particles were weighed with a balance, and th...

Embodiment 6

[0040] Clean the surface of the magnesium alloy substrate, wipe the magnesium alloy substrate with a steel brush, remove the surface scale, and obtain a rough surface, and then put the treated magnesium alloy substrate into an anhydrous ethanol solution for ultrasonic cleaning to remove surface dirt , take out to dry. The specific steps of ultra-high-speed laser cladding strengthening magnesium alloy are as follows:

[0041] (1) Set the process parameters of ultra-high-speed laser cladding: the laser power is 3.8kw, the spot diameter is 0.8mm, the cladding speed is 90m / min, and the multi-pass overlapping rate is 90%;

[0042] (2) Load the cladding powder on the ultra-high-speed laser cladding machine, and send the cladding powder to 0.2 mm above the surface of the magnesium alloy to be treated by means of synchronous powder feeding. Among them, the cladding powder was prepared according to Example 3. The metal powder and WC ceramic particles were weighed with a balance, and t...

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Abstract

The invention discloses a high-entropy alloy composite powder and a method for strengthening magnesium alloy by ultra-high-speed laser cladding. The high-entropy alloy composite powder includes nickel powder, chromium powder, cobalt powder, iron powder, copper powder, titanium powder, vanadium powder and aluminum powder, and also includes ceramic particles; the mass fraction of the ceramic particles is high-entropy alloy composite powder 10%~20% of that. The method for strengthening magnesium alloy by laser cladding includes: (1) setting the process parameters of ultra-high-speed laser cladding; (2) loading the high-entropy alloy composite powder on an ultra-high-speed laser cladding machine, so that the energy of the laser beam acts On the powder material; (3) Send the powder to the top of the surface of the magnesium alloy to be processed by synchronous powder feeding, so that the high-entropy alloy composite powder is melted into liquid droplets and drops into the molten pool on the surface of the magnesium alloy, and forms a magnesium alloy after solidification The substrate is a metallurgically bonded cladding layer. The invention avoids over-melting or over-burning of the magnesium alloy, improves the efficiency of the surface treatment of the magnesium alloy, and has the advantages of small deformation and high surface smoothness.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a high-entropy alloy composite powder and a method for superhigh-speed laser cladding strengthening magnesium alloy. Background technique [0002] Magnesium alloy is the lightest metal structure material with high specific strength, specific stiffness, excellent vibration resistance, impact resistance and cutting performance. At present, magnesium alloy has become an important material in the fields of transportation, electronic communication, national defense and military industry, and biomedicine, and has become the focus of attention of all countries in the world. However, magnesium is also the most negative metal among the practical metals, with a standard potential of -2.34V (relative to the standard hydrogen electrode). When the magnesium alloy contains some metal impurity elements (such as Fe, Ni, etc.), it is very easy to cause electrochemical corrosion; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C23C24/10B22F9/04C22F3/00
CPCB22F9/04B22F2009/043C22C30/02C22F3/00C23C24/103
Inventor 张昆涂坚黄灿张小彬黄墁王远刚周志明
Owner CHONGQING UNIV OF TECH
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