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High-entropy alloy binder phase-based nitrogen-containing hard alloy and preparation method thereof

A technology of high-entropy alloys and hard alloys, applied in the field of hard alloys, to achieve good corrosion resistance, improve comprehensive mechanical properties, and facilitate industrial production

Inactive Publication Date: 2012-11-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing cemented carbide materials, the binder phase is mainly cobalt or nickel, or a very small amount of rare earth, Mo and other elements are added, which cannot change the limitation of a single main element

Method used

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  • High-entropy alloy binder phase-based nitrogen-containing hard alloy and preparation method thereof
  • High-entropy alloy binder phase-based nitrogen-containing hard alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw materials used in this embodiment and the processing steps are as follows:

[0036] Weigh 74g WC powder, 20g (Ti, 5Nb, 5Mo, 0.2Cr, 0.5Y, 0.5Nd) (C 0.9 , N 0.1 ) solid solution powder and 6g high-entropy alloy binder phase, wherein the high-entropy alloy binder phase raw material powder components and proportioning are iron, cobalt, nickel, chromium metal elemental powder, according to the molar ratio of iron, cobalt, nickel, chromium elements 1 :1:1:1 formulation. Then put them into the ball milling tank together, put the balls into the balls according to the ratio of 8:1 ball to material, and pour in an appropriate amount of alcohol, and ball mill for 24 hours to obtain the mixed powder, which is dried and then added into the rubber forming agent according to the ratio of 1wt%. Sieve, granulate. Then the mixed raw materials are weighed to a certain weight and loaded into the mold cavity for compression molding. Then put the prepared sample into a low-pressu...

Embodiment 2

[0038] The raw materials used in this embodiment and the processing steps are as follows:

[0039] Weigh 82g μm WC powder, 5g (Ti, 15 W, 5Mo, 0.2V) (C 0.7 , N 0.3 ) solid solution powder, 5gTi(C 0.5 , N 0.5 ) solid solution powder and 8g high-entropy alloy binder phase raw materials, wherein the high-entropy alloy binder phase raw material powder components and proportioning are titanium-iron alloy powder, chromium-nickel alloy powder, iron powder, copper powder, vanadium powder and manganese powder, according to The molar ratio of iron, cobalt, nickel, chromium, titanium, copper, vanadium and manganese is 1:1:1:1:1:1:1:1. Then put them into the ball mill jar together, put the balls into the ball according to the ratio of ball to material of 6:1, and pour in an appropriate amount of alcohol, and ball mill for 72 hours to get the mixed powder. After it was dried, a paraffin wax molding agent was added in a proportion of 0.5 wt%, sieved, and granulated. Then the mixed raw mat...

Embodiment 3

[0042] The raw materials used in this embodiment and the processing steps are as follows:

[0043] Weigh 60g WC powder, 30g (Ti, 15W, 5Mo) (C 0.5 , N 0.5 ) solid solution powder and 10g high-entropy alloy binder phase raw material, wherein the high-entropy alloy binder phase raw material powder is iron powder, nickel powder, cobalt powder, aluminum powder and manganese powder, according to the mole of iron, nickel, nickel, aluminum, manganese Formulated in a ratio of 1:1:1:1:1. Then put them together into a ball mill jar, put them into the balls according to the ball-to-material ratio of 4:1, pour in an appropriate amount of alcohol, and ball mill for 36 hours to obtain a mixed powder. After it is dried, polyethylene glycol molding agent is added according to the proportion of 2wt%, sieved, and granulated. Then the mixed raw materials are weighed to a certain weight and loaded into the mold cavity for compression molding. Then put the prepared sample into a low-pressure si...

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Abstract

The invention discloses a high-entropy alloy binder phase-based nitrogen-containing hard alloy, wherein the binder phase of the nitrogen-containing hard alloy is high-entropy alloy, and the hard phase of the nitrogen-containing hard alloy is uniformly distributed WC (Wolfram Carbide) and carbon nitride solid solution; the high-entropy alloy binder phase is at least four of iron, cobalt, nickel, chromium, aluminum, vanadium, titanium, copper, zirconium, molybdenum and manganese; the molar ratio of content of each element is 5-35 percent; the carbon nitride solid solution is at least one of Ti(Cx, N1-x) and (Ti, M1, ......)(Cx, N1-x); and M1 component in the (Ti, M1, ......)(Cx, N1-x) is at least one of W, Mo, Ta, Nb, V, Cr, Zr, Hf, Y and lanthanides. According to a preparation method of the high-entropy alloy binder phase-based nitrogen-containing hard alloy, the alloy comprises the raw material components in percentage by weight: 3-25 percent of high-entropy alloy binder phase, 45-96.9 percent of WC powder and 0.1-30 percent of carbon nitride solid solution powder, wherein the nitrogen element in the nitrogen-containing hard alloy is introduced through the carbon nitride solid solution. The preparation method of the multi-element composite carbon nitride solid solution-based nitrogen-containing hard alloy comprises the following steps of: (1) mixing through ball milling; (2) shaping; and (3) performing low-pressure sintering.

Description

technical field [0001] The invention belongs to the field of hard alloys, and relates to a nitrogen-containing hard alloy based on a high-entropy alloy binder phase and a preparation method thereof. Background technique [0002] Because of its high strength and good toughness, WC-Co cemented carbide is widely used in modern manufacturing as cutting tools. However, there are still problems such as insufficient hardness and wear resistance, and its application is limited. Subsequently, people used Ti(C,N) with higher hardness than WC as the hard phase, Co or Ni as the binder phase, and added Mo 2 The second type of carbides such as C and WC are used to improve the poor wettability between Ti(C,N) and Co, Ni, and prepare Ti(C,N)-based cermets with excellent properties such as oxidation resistance, thermal conductivity and electrical conductivity. material, and it is used in the field of high-speed cutting. Although it has solved the problem of low wear resistance of the cuttin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/02C22C1/05
CPCC22C29/08B22F2207/03B22F2998/10C22C29/005B22F9/04B22F3/02B22F3/10
Inventor 刘颖叶金文
Owner SICHUAN UNIV
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