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Method for improving microstructure uniformity and frictional wear performance of Cu-containing multi-principal-element alloy

A multi-principal alloy, friction and wear technology is applied in the field of improving the microstructure uniformity and friction and wear performance of Cu-containing multi-principal alloys, which can solve the problems of poor friction and wear properties of Cu-containing multi-principal alloys, and achieve low production costs. , The effect of solidification speed realization and wear rate reduction

Active Publication Date: 2021-08-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that liquid phase separation and segregation behavior of the existing Cu element in the as-cast multi-principal alloy are relatively easy to occur, and the overall friction and wear performance of the Cu-containing multi-principal alloy is poor, and it provides an improved Methods of Microstructure Uniformity and Friction and Wear Properties of Cu Multi-principal Component Alloy

Method used

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  • Method for improving microstructure uniformity and frictional wear performance of Cu-containing multi-principal-element alloy
  • Method for improving microstructure uniformity and frictional wear performance of Cu-containing multi-principal-element alloy
  • Method for improving microstructure uniformity and frictional wear performance of Cu-containing multi-principal-element alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Preparation of a Cu-containing multi-principal alloy sample with a slow solidification rate. Example 1 The initial composition of the alloy is an ingot of FeCoNiCu master alloy with uniform macrostructure, which is first cut into 3-5g alloy pieces.

[0064] In order to facilitate the production of mechanical test samples, weigh not less than 20g of the as-cast master alloy small pieces prepared in the comparative example, put them into a quartz glass crucible with an outer diameter of 22mm and a wall thickness of 1.5mm, and place them on the upper and lower surfaces of the metal Put some boron oxide (B 2 o 3 ) Purifying agent, place the quartz glass crucible in the high-frequency induction coil of the induction melting furnace chamber.

[0065] First vacuum to 1*10 -3 Pa, filled with high-purity Ar gas to 5*10 -2 MPa scrubbing. Then vacuum the second time to 1*10 -3 Pa, then filled with high-purity Ar gas to 5*10 -2 MPa.

[0066] Turn on the high-frequency induct...

Embodiment 2

[0076] Preparation of a Cu-containing multi-principal alloy sample with an intermediate supercooling solidification rate. The initial composition of the alloy in Example 2 is a FeCoNiCu master alloy ingot with uniform structure, which is first cut into 3-5g alloy pieces.

[0077] Weigh not less than 20g of the as-cast master alloy fritter that comparative example makes, it is put into the quartz glass crucible that outer diameter is 22mm, and wall thickness is 1.5mm, and puts some boron oxide (B 2 o 3 ) Purifying agent, place the quartz glass crucible in the high-frequency induction coil of the chamber.

[0078] First vacuum to 1*10 -3 Pa, filled with high-purity Ar gas to 5*10 -2 MPa scrubbing. Then vacuum the second time to 1*10 -3 Pa, then filled with high-purity Ar gas to 5*10 -2 MPa.

[0079] Turn on the high-frequency induction heating power supply, and use the induction coil wound by copper tube to heat the sample to a temperature higher than B 2 o 3 The melting p...

Embodiment 3

[0089] Preparation of a Cu-containing multi-principal alloy sample with a fast solidification speed. The initial composition of the alloy in Example 3 is a FeCoNiCu master alloy ingot with a uniform macrostructure, which is first cut into 3-5g alloy pieces.

[0090] Weigh not less than 20g of the as-cast master alloy fritter that comparative example makes, it is put into the quartz glass crucible that outer diameter is 22mm, and wall thickness is 1.5mm, and puts some boron oxide (B 2 o 3 ) Purifying agent, place the quartz glass crucible in the high-frequency induction coil of the chamber.

[0091] First vacuum to 1*10 -3 Pa, filled with high-purity Ar gas to 5*10 -2 MPa scrubbing. Then vacuum the second time to 1*10 -3 Pa, then filled with high-purity Ar gas to 5*10 -2 MPa.

[0092] Turn on the high-frequency induction heating power supply, and use the induction coil wound by copper tube to heat the sample to a temperature higher than B 2 o 3 The melting point of but ...

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Abstract

The invention provides a method for improving microstructure uniformity and frictional wear performance of a Cu-containing multi-principal-element alloy. The method solves the technical problems that segregation behavior and liquid phase separation of an existing Cu element in an as-cast multi-principal-element alloy being prone to be occurring, and the overall frictional wear performance of the Cu-containing multi-principal-element alloy is poor. According to the method, alloy liquid metal melt is wrapped in the interior of molten glass, the high solidification speed is obtained, tissue homogenization of the alloy melt can be achieved without assistance of other rapid quenching solidification tools, and the alloy tissue after grain refinement can be obtained. The method has a good effect on the large-size block alloy, the production cost is low, and the method is simple and efficient.

Description

technical field [0001] The invention belongs to the technical field of preparing Cu-containing multi-principal alloys, and in particular relates to a method for improving the microstructure uniformity and friction and wear performance of Cu-containing multi-principal alloys. Background technique [0002] Multi-principal alloys are composed of a variety of selected main elements, and a large number of combination possibilities make them potential materials with excellent mechanical properties, corrosion resistance, wear resistance and other functional properties; and the performance of multi-principal alloys depends on The control of the alloying elements, phase composition, volume fraction, microstructure, etc. of the material, and the preparation process is also a necessary way to obtain alloys with excellent properties. [0003] Casting is the most commonly used metal thermal processing process for multi-principal alloy smelting. The literature [A.Verma, P.Taratea, A.C.Abh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06B22D27/20C22C30/02
CPCC22C1/03C22C1/06B22D27/20C22C30/02
Inventor 张建宝崔德旭任越贺一轩王海丰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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