CN104831148A - Cu-Co3O4-Al2O3 coating material and prepration method thereof - Google Patents

Abstract

The invention relates to a Cu-Co3O4-Al2O3 coating material and a prepration method thereof. The Cu-Co3O4-Al2O3 coating material comprises the following components in parts by mass: 8 parts of Cu, 29-44 parts of Co3O4, 56-70 parts of Al2O3, 1 part of TiO2 and 0.15-0.65 part of microelement, wherein the microelement includes Al, Mo, B, Mn and Co. The preparation method comprises the following steps: preparing Cu-Co3O4-Al2O3 nanospheres by using a gas atomization method; and mixing the prepared Cu-Co3O4-Al2O3 nanospheres with nanopowder (prepared from Al, Mo, B, Mn and Co) by using an active agent protection method. The coating has the hardness reaching HRC44, the density reaching 8.33g/cm<3>, the coating thickness reaching 5mm, the excellent compactness reaching 0.71, is applicable to plasma spraying, and has certain hardness and anti-wear property, high combination strength and relatively high grabbing force.

Description

Cu-Co 3o 4-Al 2o 3coated material and preparation method thereof

Technical field

The present invention relates to technical field of hot, is Cu-Co specifically ₃o ₄-Al ₂o ₃coated material and preparation method thereof.

Background technology

In thermal spray process, trickle and dispersion metal or nonmetallic coated material, to melt or semi-molten state, deposit to through preparation matrix surface, form certain spray deposited layer.Its thermal source utilized, as Powdered or thread metal or non-metallic material are heated to melting or semi-melting state by electric arc, plasma spraying or combustion flame etc., then be ejected into pretreated matrix surface by flame stream itself or pressurized air with certain speed, deposit and form the technology with the top coat of various function.

Plasma spraying is in thermospray, and plasma spraying plasma spraying is the technology of material surface strengthening and surface modification, and matrix surface can be made to have wear-resisting, anti-corrosion, high temperature oxidation resisting, electrical isolation, heat insulation, radioprotective, the performance such as anti-attrition and sealing.

In many decades in the past, plasma spraying technology development rapidly, but the popularization and application that the material bond strength that traditional spraying technology uses is poor, void content is high, the problem that wears no resistance hinders hot-spraying techniques.Be difficult to meet the service requirements of people at more and more common extreme environment.

Summary of the invention

Poor in order to solve conventional coatings wear resistance, the problems such as hardness is lower, the invention provides Cu-Co ₃o ₄-Al ₂o ₃coated material and preparation method thereof.

Technical problem to be solved by this invention realizes by the following technical solutions:

Cu-Co ₃o ₄-Al ₂o ₃coated material, the mass fraction of its component and each component is that Cu accounts for 8 parts, Co ₃o ₄account for 29-44 part, Al ₂o ₃account for 56-70 part, TiO ₂account for 1 part, trace element accounts for 0.15-0.65 part, Al ₂o ₃and TiO ₂equal bonding strength and the hardness that can improve material.

Described trace element is Al, Mo, B, Mn, Co.

The pure metal of Mo is silvery white, very hard, and a small amount of Mo is added among Fe, can improve coating hardness.

Under high temperature B also with many metals and reactive metal oxide, formed metal boride.These compounds are high rigidity, refractory, high conductivity and chemically inert material normally, often has special character.

Co is the glossiness Steel Grey metal of tool, harder and crisp, water effect of getting along well at normal temperatures, also very stable in malaria.

Cu-Co ₃o ₄-Al ₂o ₃the preparation method of coated material, comprises the following steps:

(1) aerosolization legal system is adopted to obtain Cu-Co ₃o ₄-Al ₂o ₃nanometer ball;

(2) mixing of promoting agent protection method Al, Mo, B, Mn, Co is adopted by nanometer ball obtained in step (1) to obtain nanometer powder.

The invention has the beneficial effects as follows: coating hardness of the present invention reaches HRC44, density can reach 8.33g/cm ³, coating thickness can reach 5 millimeters, and density is well 0.71, is applicable to plasma spraying, has certain hardness and wear resistance, and bonding strength, grasping force are higher.The present invention has very large progress compared with conventional alloys material, and at identical conditions, the anchoring strength of coating that the present invention makes is about 2 times of common coating.

Embodiment

The technique means realized to make the present invention and creation characteristic are easy to understand, and set forth further below to the present invention.

Embodiment one:

Cu-Co ₃o ₄-Al ₂o ₃coated material, the mass fraction of its component and each component is that Cu accounts for 8 parts, Co ₃o ₄account for 29 parts, Al ₂o ₃account for 56 parts, TiO ₂account for 1 part, trace element accounts for 0.15 part.

Described trace element is Al, Mo, B, Mn, Co.

Cu-Co ₃o ₄-Al ₂o ₃the preparation method of coated material, comprises the following steps:

(1) aerosolization legal system is adopted to obtain Cu-Co ₃o ₄-Al ₂o ₃nanometer ball;

(2) mixing of promoting agent protection method Al, Mo, B, Mn, Co is adopted by nanometer ball obtained in step (1) to obtain nanometer powder.

Embodiment two:

Cu-Co ₃o ₄-Al ₂o ₃coated material, the mass fraction of its component and each component is that Cu accounts for 8 parts, Co ₃o ₄account for 34 parts, Al ₂o ₃account for 59 parts, TiO ₂account for 1 part, trace element accounts for 0.36 part.

Described trace element is Al, Mo, B, Mn, Co.

Cu-Co ₃o ₄-Al ₂o ₃the preparation method of coated material, with embodiment one.

Embodiment three:

Cu-Co ₃o ₄-Al ₂o ₃coated material, the mass fraction of its component and each component is that Cu accounts for 8 parts, Co ₃o ₄account for 37 parts, Al ₂o ₃account for 63 parts, TiO ₂account for 1 part, trace element accounts for 0.53 part.

Described trace element is Al, Mo, B, Mn, Co.

Cu-Co ₃o ₄-Al ₂o ₃the preparation method of coated material, with embodiment one.

Embodiment four:

Cu-Co ₃o ₄-Al ₂o ₃coated material, the mass fraction of its component and each component is that Cu accounts for 8 parts, Co ₃o ₄account for 44 parts, Al ₂o ₃account for 70 parts, TiO ₂account for 1 part, trace element accounts for 0.65 part.

Described trace element is Al, Mo, B, Mn, Co.

Cu-Co ₃o ₄-Al ₂o ₃the preparation method of coated material, with embodiment one.

Adopt plasma spraying technology obtained Cu-Co on the rod class workpiece being matrix with 20Co steel ₃o ₄-Al ₂o ₃nano coating, the matrix with described coating and bonding strength, microhardness, void content and the abrasive wear resistance contrast and experiment without the matrix of described coating are in table 1:

Table 1 Cu-Co ₃o ₄-Al ₂o ₃the performance comparison experimental result of nano coating and 20Co steel matrix:

Experimental group is numbered	Porosity (AREA%)	Bonding strength (MPa)	Microhardness (HV)
				1	0.633	76.2	646
2	0.527	79.4	532
				3	0.461	81.7	687
4	0.445	84.2	642
				Mean value	0.516	80.8	613
Comparative group	0.913	42.6	361

Adopt plasma spraying technology obtained Cu-Co on the rod class workpiece being matrix with 20Co steel ₃o ₄-Al ₂o ₃coating, the abrasion loss contrast and experiment of the matrix with described coating and the matrix without described coating is in table 2:

Table 2 Cu-Co ₃o ₄-Al ₂o ₃the abrasion loss contrast and experiment of nano coating and 20Co steel matrix:

Experimental group is numbered	Before wearing and tearing (g)	After wearing and tearing (g)	Abrasion loss (g)
				1	66.5454	66.5390	0.0064
2	66.1874	66.1819	0.0055
				3	63.8441	66.8378	0.0063
4	66.6998	66.6929	0.0069

Comparative group

66.6538

66.6345

0.0164

From table 1 and table 2, Cu-Co ₃o ₄-Al ₂o ₃the excellent combination property of nano coating, wear resistance is good.

The present invention is applicable to plasma spraying, and available spraying steel have: 2Cr13,4Cr13,9Cr18,4Cr5W2VSi, 8Cr3 etc.

More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; the just principle of the present invention described in above-described embodiment and specification sheets; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (2)

1.Cu-Co ₃o ₄-Al ₂o ₃coated material, is characterized in that: the mass fraction of its component and each component is that Cu accounts for 8 parts, Co ₃o ₄account for 29-44 part, Al ₂o ₃account for 56-70 part, TiO ₂account for 1 part, trace element accounts for 0.15-0.65 part;

Described trace element is Al, Mo, B, Mn, Co.

2.Cu-Co ₃o ₄-Al ₂o ₃the preparation method of coated material, is characterized in that: comprise the following steps:

(1) aerosolization legal system is adopted to obtain Cu-Co ₃o ₄-Al ₂o ₃nanometer ball;

(2) mixing of promoting agent protection method Al, Mo, B, Mn, Co is adopted by nanometer ball obtained in step (1) to obtain nanometer powder.