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Method for preparing high-entropy alloy/diamond composite film or coating by fixed-point energy input and rapid cooling

A composite material film and high-entropy alloy technology, which is applied in the field of preparation of special composite materials, can solve the problems of diamond, high-entropy alloy carcass and substrate can not be effectively combined, binder powder melting is insufficient, energy density is not suitable, etc. , achieve the effect of shortening the contact time, controllable alloy composition and low cost

Active Publication Date: 2018-09-28
江西咏泰粉末冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the energy density is not suitable or the matching degree with the binder is not high, during the preparation process, the diamond will be severely ablated, transformed into a graphite state and stored in or dissolved in the binder [1] , or the binder powder is not sufficiently melted, and the diamond, high-entropy alloy matrix and the substrate cannot be effectively combined
So far, there is no method for preparing high-entropy alloy / diamond wear-resistant tools by laser cladding technology.

Method used

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  • Method for preparing high-entropy alloy/diamond composite film or coating by fixed-point energy input and rapid cooling
  • Method for preparing high-entropy alloy/diamond composite film or coating by fixed-point energy input and rapid cooling
  • Method for preparing high-entropy alloy/diamond composite film or coating by fixed-point energy input and rapid cooling

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A method for rapidly preparing high-entropy alloy / diamond circular saw blades by high-speed laser cladding, using FeCoCrNiMo alloy as the matrix material to prepare high-entropy alloy / diamond composite saw blades by high-speed laser cladding, and the diamond particles The mass ratio fraction is 5%.

[0052] The method for rapidly preparing a high-entropy alloy / diamond circular saw blade by high-speed laser cladding in this embodiment includes the following steps:

[0053] (1) Select atomized FeCoCrNiMo high-entropy alloy powder with a particle size of 45-90 μm and an oxygen content of 215ppm, select 140 / 170 mesh broken diamond particles for mixing, and the mass percentage of diamond particles is 5%;

[0054] (2) Preheat the high-entropy alloy powder / diamond mixture below 70°C for 30 minutes, put it into the silo, and adopt a high-speed laser cladding process (placed vertically, the laser spot with a diameter of 4.5mm, 40mm / s cladding rate, 2000w laser power, 1L / min pr...

Embodiment 2

[0058] A method for rapidly preparing high-entropy alloy / diamond circular saw blades by high-speed laser cladding, using FeCoCrNiMo alloy as the matrix material to prepare high-entropy alloy / diamond composite saw blades by high-speed laser cladding, and the diamond particles The mass ratio fraction is 2%.

[0059] The method for rapidly preparing a high-entropy alloy / diamond circular saw blade by high-speed laser cladding in this embodiment includes the following steps:

[0060] (1) Select atomized FeCoCrNiMo high-entropy alloy powder with a particle size of 45-90 μm and an oxygen content of 375 ppm, and select B-grade diamond particles of 140 / 170 mesh for uniform mixing;

[0061] (2) Preheat the high-entropy alloy powder / diamond mixture below 70°C for 60 minutes, put it into the silo, and adopt a high-speed laser cladding process (placed vertically, the laser spot with a diameter of 6.3mm, 50mm / s cladding rate, 5500w laser power, 15L / min shielding gas flow) cladding on both...

Embodiment 3

[0065] A method for rapidly preparing high-entropy alloy / diamond circular saw blades by high-speed laser cladding, using FeCoCrNiMo alloy as the matrix material to prepare high-entropy alloy / diamond composite saw blades by high-speed laser cladding, and the diamond particles The mass ratio fraction is 20%.

[0066] The method for rapidly preparing a high-entropy alloy / diamond circular saw blade by high-speed laser cladding in this embodiment includes the following steps:

[0067] (1) Select atomized FeCoCrNiMo high-entropy alloy powder with a particle size of 45-90 μm and an oxygen content of 315 ppm, and select C-grade diamond particles of 50 / 60 mesh for uniform mixing;

[0068] (2) Preheat the high-entropy alloy powder / diamond mixture below 70°C for 60 minutes, put it into the silo, and adopt the high-speed laser cladding process (placed horizontally, the laser spot with a diameter of 4.5mm, 100mm / s The cladding rate, 5500w laser power, 30L / min protective gas flow rate, liq...

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Abstract

The invention belongs to the field of preparation of composite materials, and relates to a method for preparing a high-entropy alloy / diamond composite film or coating by fixed-point energy input and rapid cooling. The preparation method comprises the steps that high-entropy alloy powder and diamond particles are prepared according to a set ratio; a high-entropy alloy / diamond composite is preparedby the methods of the fixed-point energy input and rapid cooling; the energy density range of the fixed-point energy input is 10-40J / mm<2>; the cooling rate is greater than or equal to 106 DEG C / min;and during fixed-point energy input, the diameter of an energy input point is 4.5-6.3mm, and the moving speed of the energy input point is 40-100mm / s. A carrier and diamonds are protected from being destroyed, and at the same time, the high-entropy alloy / diamond composite film or coating is rapidly prepared, so that uniform distribution of the diamond particles inside the carcass is realized, andthe process is suitable for the diamond particles with various qualities and various types of laser cladding equipment.

Description

technical field [0001] The invention belongs to the field of preparation of special composite materials, and relates to a method for preparing a high-entropy alloy / diamond composite material film or coating by fast cooling with fixed-point input energy; in particular, it relates to a high-speed laser cladding of a high-entropy alloy / diamond saw blade Preparation. Background technique [0002] High-entropy alloy is a special alloy composed of a variety of main elements. It has high-entropy effects, hysteretic diffusion effects, lattice distortion effects and cocktail effects, which endow high-entropy alloys with high A series of excellent mechanical properties such as hardness, high strength, and good corrosion resistance; and through the compounding of different elements, high-entropy alloys with different characteristics can be obtained, which has high academic research value and industrial application potential, especially in cutting tools has received widespread attentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C30/00C22C26/00
CPCC22C26/00C22C30/00C23C24/103
Inventor 张伟张明阳刘咏
Owner 江西咏泰粉末冶金有限公司
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