CN106048492A - Ni60A-Cu-WC nano-coating and preparation method thereof - Google Patents

Abstract

The invention relates to a Ni60A-Cu-WC nano-coating and a preparation method thereof. The Ni60A-Cu-WC nano-coating comprises, by mass, 16 to 27 parts of Ni60A, 21 to 42 parts of Cu, 35 to 67 parts of WC and 1 part of a trace element. The preparation method comprises the following steps: (1) preparing Ni60A-Cu-WC nanospheres by using a wet grinding method; (2) mixing the prepared nanospheres with Sn, B and Fe by using a surfactant protection method so as to obtain nano-powder; and (3) spraying the mixed nano-powder prepared in the step (2) onto the surface of a Fe-based workpiece by using a high-velocity oxy-fuel spraying process so as to prepare the Ni60A-Cu-WC nano-coating. The Ni60A-Cu-WC nano-coating and the preparation method thereof in the invention overcome the problems of poor wear resistance and low corrosion resistance of conventional tungsten carbide coatings, improve the microstructure and structure of a coating on the surface of a material and enhance the wear resistance of the surface of the material.

Description

A kind of Ni60A-Cu-WC nano coating and preparation method thereof

Technical field

The present invention relates to thermal spraying material technical field, a kind of Ni60A-Cu-WC nano coating and preparation thereof Method.

Background technology

Thermal spraying is to utilize certain thermal source (such as electric arc, plasma spraying or combustion flame etc.) by powder or thread gold Belong to or nonmetallic materials are heated to melted or semi-molten state, then spray with certain speed by flame stream itself or compressed air To pretreated matrix surface, deposit and form a kind of technology of the face coat with various function.

The material bond strength that traditional spraying technology uses is poor, porosity height, wear no resistance.Novel hot sprayed on material needs Make up these defects, adopt new technology, new method, new formula prepare there is high rigidity, high-wearing feature, highly corrosion resistant, micro- Seeing uniform texture, the excellent material of comprehensive mechanical property becomes the demand that people are urgent.

Summary of the invention

Poor in order to solve conventional coatings wearability, the problems such as hardness is relatively low, the present invention provides a kind of Ni60A-Cu-WC to receive Rice coating and preparation method thereof.

The technical problem to be solved realizes by the following technical solutions:

A kind of Ni60A-Cu-WC nano coating, the mass fraction of its component and each component is that Ni60A accounts for 16-27 part, Cu accounts for 21-42 part, WC accounts for 35-67 part, trace element accounts for 1 part.

Described trace element is Sn, B, Fe, and Sn, B, Fe mass proportioning is 1:0.5:1.

The preparation method of a kind of Ni60A-Cu-WC nano coating, comprises the following steps:

(1) case of wet attrition legal system is used to obtain the nanosphere of Ni60A-Cu-WC.

(2) nanosphere prepared in step (1) use surfactant Protection Code mixing Sn, B, Fe prepare nano powder End.

(3) HVAF technique is used to prepare on iron-base workpiece surface in the mixture prepared in step (2) Ni60A-Cu-WC nano coating.

The invention has the beneficial effects as follows: the present invention solves the problem that existing coating abrasion performance is poor, corrosion resistance is relatively low, Improving the microstructure of material surface coating, structure, make coating hardness improve 75%, elastic modelling quantity improves 12%- 19.4%, thus the overall anti-wear performance improving material surface.

Detailed description of the invention

In order to make technological means that the present invention realizes and creation characteristic be easy to understand, below the present invention is explained further State.

Embodiment one:

A kind of Ni60A-Cu-WC nano coating, the mass fraction of its component and each component be Ni60A account for 16 parts, Cu account for 21 Part, WC account for 35 parts, trace element account for 1 part.

Described trace element is Sn, B, Fe, and Sn, B, Fe mass proportioning is 1:0.5:1.

The preparation method of a kind of Ni60A-Cu-WC nano coating, comprises the following steps:

(1) case of wet attrition legal system is used to obtain the nanosphere of Ni60A-Cu-WC；

(2) nanosphere prepared in step (1) use surfactant Protection Code mixing Sn, B, Fe prepare nano powder End；

(3) HVAF technique is used to prepare on iron-base workpiece surface in the mixture prepared in step (2) Ni60A-Cu-WC nano coating.

Embodiment two:

A kind of Ni60A-Cu-WC nano coating, the mass fraction of its component and each component be Ni60A account for 27 parts, Cu account for 42 Part, WC account for 67 parts, trace element account for 1 part.

Described trace element is Sn, B, Fe, and Sn, B, Fe mass proportioning is 1:0.5:1.

The preparation method of a kind of Ni60A-Cu-WC nano coating is identical with embodiment one.

Embodiment three:

A kind of Ni60A-Cu-WC nano coating, the mass fraction of its component and each component be Ni60A account for 20 parts, Cu account for 35 Part, WC account for 58 parts, trace element account for 1 part.

Described trace element is Sn, B, Fe, and Sn, B, Fe mass proportioning is 1:0.5:1.

The preparation method of a kind of Ni60A-Cu-WC nano coating is identical with embodiment one.

Supersonic spray coating technology is used to prepare Ni60A-Cu-WC nano coating on iron-based rod class workpiece, with described painting The matrix of layer is real with the bond strength of matrix, microhardness, the porosity and the abrasive wear resistance contrast without described coating Test and the results are shown in Table 1:

Table 1 Ni60A-Cu-WC nano coating with without coating iron-based rod class workpiece performance comparison experimental result:

Experimental group is numbered	Porosity (AREA%)	Bond strength (MPa)	Microhardness (HV)
				1	0.484	68.4	982
2	0.576	69.1	974
				3	0.467	64.5	965
Meansigma methods	0.509	67.3	974
				Contrast groups	0.573	65.2	892

Supersonic spray coating technology is used to prepare Ni60A-Cu-WC coating on iron-based rod class workpiece, with described coating Matrix and the wear extent contrast and experiment of matrix without described coating are shown in Table 2:

Table 2 Ni60A-Cu-WC nano coating and the wear extent contrast and experiment of iron-based rod class workpiece:

Experimental group is numbered	Before abrasion (g)	After abrasion (g)	Wear extent (g)
				1	58.4512	58.4465	0.0047
2	58.6184	58.6139	0.0045
				3	58.4754	58.4716	0.0038
Contrast groups	58.6968	58.6904	0.0064

From Tables 1 and 2, the excellent combination property of Ni60A-Cu-WC nano coating, wearability is good.

The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry The personnel simply present invention it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description Principle, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these change and Improvement both falls within scope of the claimed invention.Claimed scope is by appending claims and equivalence thereof Thing defines.

Claims (2)

1. a Ni60A-Cu-WC nano coating, it is characterised in that: the mass fraction of its component and each component is that Ni60A accounts for 16- 27 parts, Cu accounts for 21-42 part, WC accounts for 35-67 part, trace element accounts for 1 part；

Described trace element is Sn, B, Fe, and Sn, B, Fe mass proportioning is 1:0.5:1.

2. the preparation method of a Ni60A-Cu-WC nano coating, it is characterised in that: comprise the following steps:

(1) case of wet attrition legal system is used to obtain the nanosphere of Ni60A-Cu-WC；

(2) nanosphere prepared in step (1) use surfactant Protection Code mixing Sn, B, Fe prepare nanometer powder；

(3) HVAF technique is used to prepare Ni60A-on iron-base workpiece surface in the mixture prepared in step (2) Cu-WC nano coating.