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A kind of nickel-chromium-diamond alloy composite powder and its preparation method and application

A diamond powder and composite powder technology, which is applied in metal processing equipment, transportation and packaging, metal material coating technology, etc., can solve the problems of diamond performance brittleness, limited application area, single forming method, etc., and achieve excellent anti-corrosion Effect

Active Publication Date: 2020-05-22
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, diamond is brittle, and its forming method is single, so its application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1a: Spherical or irregular diamond powder with a particle size of less than 100 μm is secondary granulated by supersonic plasma spraying method, sprayed at a high speed until cooled by a water curtain below 10°C, washed with water, and dried to become spherical diamond powder; supersonic plasma spraying Voltage 50-55V, spraying current 600-620A, argon gas 20-25L / min, nitrogen gas 6-7L / min, powder feeding flow rate 7-7.5kg / h, spraying distance 250mm, water curtain and spraying are vertically distributed. The sprayed diamond particles are washed with water and rapidly cooled, and after drying, sieve 5-15 μm spherical diamond powder;

[0034] Step 1b: Requirements for the composition of the nickel-chromium metal binder phase alloy, mix nickel NiCr alloy, FeCrMo alloy and Co metal into the vacuum melting furnace of VIGA equipment for melting, the melting temperature is 1300 ° C, and refine the NiCr-based metal binder phase alloy Melt; vacuum 0.8x10 -1 Pa, through Ar g...

Embodiment 2

[0040] Step 2a: Secondary granulation of spherical or irregular diamond powder with particle size below 100 μm by supersonic plasma spraying method, high-speed spraying to below 10°C for water curtain cooling, washing and drying to become spherical diamond powder; supersonic plasma spraying The voltage is 65-70V, the spraying current is 550-600A, the argon gas is 35-38L / min, the nitrogen gas is 11-12L / min, the powder feeding flow rate is 19-20kg / h, the spraying distance is 200mm, and the water curtain and the spraying are vertically distributed. The sprayed diamond particles are washed with water and rapidly cooled, and after drying, sieve 5-8μm spherical diamond powder;

[0041] Step 2b: Requirements for the composition of the nickel-chromium metal binder phase alloy, mix nickel NiCr alloy, FeCrMo alloy and Co metal into the vacuum melting furnace of VIGA equipment for melting, the melting temperature is 1400 ° C, and refine the NiCr-based metal binder phase alloy Melt; vacuu...

Embodiment 3

[0047] Step 3a: Spherical or irregular diamond powder with a particle size of less than 100 μm is secondary granulated by supersonic plasma spraying method, sprayed at a high speed until cooled by a water curtain below 10°C, washed with water, and dried to become spherical diamond powder; supersonic plasma spraying The voltage is 55-60V, the spraying current is 620-650A, the argon gas is 40-46L / min, the nitrogen gas is 8-9L / min, the powder feeding flow rate is 6-6.5kg / h, the spraying distance is 300mm, and the water curtain and the spraying are vertically distributed. The sprayed diamond particles are washed with water and rapidly cooled, and after drying, sieve 10-15μm spherical diamond powder;

[0048] Step 3b: Requirements for the composition of the nickel-chromium metal binder phase alloy, mix nickel NiCr alloy, FeCrMo alloy and Co metal into the vacuum melting furnace of VIGA equipment for melting, the melting temperature is 1150 ° C, and refine the NiCr-based metal binder...

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Abstract

The invention discloses a nickel-chromium-diamond alloy composite powder, a preparation method and application thereof, and belongs to the field of diamond composite material processing. According to the mass percentage content, the nickel-chromium-diamond alloy composite powder is composed of the following components: 35-60% of diamond, 11.4-29.6% of Cr, 1.2-2.6% of Mo, 0.4-1.5% of Fe, 2.9 -6.2% Co, balance Ni. The nickel-chromium-diamond alloy composite powder of the present invention provides composite powder materials with excellent anti-corrosion, wear-resistant and anti-oxidation functions for 3D printing, thermal spraying, powder metallurgy, hot-pressing sintering, etc.

Description

technical field [0001] The invention belongs to the field of metal powder material technology and advanced manufacturing application, and specifically relates to the technology of nickel-chromium-diamond alloy composite powder material, which is mainly used for high-speed thermal spraying, hot-pressing sintering and 3D printing. Background technique [0002] Hard surface materials have developed from cemented carbide to surface coating, mainly including surface coating, spraying WC and superhard alloy surfacing. In the field of diamond wear-resistant applications, there are mainly diamond coatings or diamond monolithic materials. Due to the high hardness and brittleness of diamond itself, it is neither economical nor durable to use it as a monolithic material. [0003] In order to obtain higher wear resistance, diamond or diamond-like coatings, coatings and monolithic diamond composites have gradually attracted the attention of scientific and technological workers. The inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C26/00C22C30/00C22C1/05C22C1/10B22F9/08B22F1/00B22F1/02C23C4/06B22F3/14B33Y70/00
CPCC22C26/00C22C30/00C22C1/05B22F9/082B22F9/08C23C4/06B22F3/14B33Y70/00B22F2009/0824B22F1/17B22F1/10
Inventor 陈正沈承金陶庆吉喆张平任宣儒张金勇何业增
Owner CHINA UNIV OF MINING & TECH
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