CN103614683B - A kind of hot spray wire and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of hot spray wire and preparation method thereof, including crust and the core being filled in outer Intradermal, described crust is Zn-0.8Al-0.35Re alloy, and core is Al-5Mg alloy. Composite spray wire has good mechanical property, and processability is excellent. When using spraying wire prepared by the present invention to spray, coating has excellent decay resistance.

Description

A kind of hot spray wire and preparation method thereof

Technical field

The present invention relates to a kind of Novel hot spraying wire and preparation method thereof.

Background technology

Thermal spraying Zn, Al and alloy coat thereof are always up for one of steel structure surface antiseptical important technology. In order to improve the coating corrosion protection ability to steel matrix, and then ensureing to be equipped in military service process and do not affect the performance of performance because surface corrosion was lost efficacy, people have carried out with regard to aspects such as spraying equipment, spraying coating process and sprayed on material and have studied widely. Wherein bianry alloy corrosion-inhibiting coating prepared by electric arc spraying Zn-15Al solid silk material is one of most representational technology. But Zn-15Al alloy coat is under the mal-conditions such as ocean, high temperature, high humidity, high salt fog, and its decay resistance weakens, and service life substantially reduces. For this reason, it may be necessary to the method that research improves Zn-Al coating corrosion resistance further.

Zn-Al alloy coating is added a small amount of Mg element and can further improve the anti-corrosion capability in Zn-Al alloy coating. Zn-Al-Mg pseudo alloy coating prepared by plasma spray technology is by spraying the silk material of two kinds of different materials or the respective coatings adopting the method for powder cored filament material to obtain. In thermal spray process, Mg is easier to oxidation and evaporation, preferentially forms the oxide of spinel structure. Compared with other coating system, Zn-Al-Mg pseudo alloy coating has better corrosion resistance, and the corrosion resisting property that this coating is excellent is considered essentially from the effect of Mg and Zn in pseudo alloy coating. Wherein the effect of Mg is to form spinelle oxide-film to improve the cathodic protection effect of Al in coating; and Al-Mg thin layer has certain self sealing capability; can delay the corrosion rate of steel substrate further, and the self-enclosed effect of Zn, it is also possible to slow down the loss of Al in coating. Hot dip galvanizing-Al alloy coat corrosion product containing micro Mg element is typical nano-sized crystal body, and the formation of these nanoscale corrosion products makes Zn-Al alloy coating have excellent corrosion resistance.

Zn-Al alloy coating is added a small amount of Re and can improve the corrosion resisting property of coating further, Re element can refine the microstructure of coating, reduce the porosity of sprayed coating, Zn-Al alloy coating had certain invigoration effect simultaneously, additionally, the addition of rare earth element, is greatly improved the surface activity of mobility and the sprayed on material melting particle, reduces the surface tension of spraying molten drop. Re is main in Zn-Al alloy to be existed with three kinds of forms: solid solution is in the base; Segregation is at phase boundary, crystal boundary and dendrite circle;It is solid-solubilized in compound or exists with compound form. When content is lower than 0.1%, rare earth is mainly strengthened with first two form, wherein the first form plays the effect of limited solution strengthening, the second form increases deformation drag, the intermetallic compound that the elements such as rare earth and Al, Mg, Si are formed is spherical and corynebacterium distribution, has a large amount of dislocation to be distributed in crystal boundary or intergranular structure; When content of rare earth is more than 0.3%, last a kind of augmented form is occupied an leading position, at this moment, rare earth forms many cenotypes containing rare earth element with other element in alloy, make the shape of second-phase, size change simultaneously, it is likely to make second-phase become corynebacterium particle from transfer of shapes such as strips, the size of particle also becomes relatively fine, and in Dispersed precipitate, the major part second-phase containing rare earth element all occurs in that the feature of particlized, nodularization and refinement, and this change enhances Zn-Al alloy to a certain extent.

Summary of the invention

For the shortcoming of conventional spray paint silk, the present invention provides a kind of novel hot spray wire.

To achieve these goals, technical scheme is as follows:

A kind of hot spray wire, including crust and core, wherein, described crust by zinc, aluminum, rhenium alloy make, described core is made up of magnalium, in described hot spray wire, in parts by weight, Al is 13��15%, and Mg is 0.5��1.0%, Re is 0.1��0.5%, and surplus is zinc and inevitable impurity.

As a kind of preferred version, described magnalium is Al-5Mg alloy, described zinc, aluminum, rhenium alloy be Zn-0.8Al-0.35Re alloy, described Zn-0.8Al-0.35Re alloy be stoichiometrically by fusing Zn in add Al-Re intermediate alloy be prepared from.

As a kind of preferred version, the diameter of described hot spray wire is 1.6��4.0mm.

A kind of method preparing hot spray wire of the present invention, comprises the steps:

Zn-0.8Al-0.35Re alloy strip steel rolled stock is rolled into U-shaped band;

Described U-shaped band adds Al-5Mg B alloy wire;

U-shaped strip-rolling containing Al-5Mg B alloy wire is become O shape silk material;

Described O shape silk material is carried out tube reducing and obtains Zn-14Al-0.7Mg-0.3Re spraying wire.

Spraying wire prepared by the present invention has the advantage that Conventional processing methods cannot be processed, and can arbitrarily adjust the ratio of alloying element in Spray Wire. The coating after the spraying of this Spray Wire is used to have excellent decay resistance, high with the adhesion of mother metal, and the porosity of coating is little.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of hot spray wire of the present invention.

Detailed description of the invention

A kind of novel hot spray wire, as it is shown in figure 1, include core 2, and the crust 1 of parcel core, described Spray Wire core 2 is Al-5Mg alloy, and crust is Zn-0.8Al-0.35Re alloy. Below in conjunction with embodiment, the present invention will be described.

The preparation of Zn-0.8Al-0.35Re: melted by Zn, stoichiometrically adds Al-Re intermediate alloy in Zn, and melting forms.

Embodiment 1

Hot spray wire in the present embodiment, its core is Al-5Mg alloy, and crust is Zn-0.8Al-0.35Re alloy, and the composition of composite spray wire is Zn-14Al-0.7Mg-0.3Re. Table 1 lists the related data of Spray Wire.

Table 1

Spraying wire diameter/mm	Al-5Mg diameter/mm	Zn-0.8Al-0.35Re thickness/mm
			1.6	0.88	0.36
2.0	1.1	0.45
			3.0	1.65	0.675
4.0	2.2	0.9

Concrete preparation method is: respectively by thickness be 0.36,0.45,0.675, the Zn-0.8Al-0.35Re alloy strip steel rolled stock of 0.9mm become U-shaped by mill milling, the Al-5Mg B alloy wire of diameter 0.88mm, 1.1mm, 1.65mm, 2.2mm is added respectively in the band of U-shaped, then pass through milling train and roll into O shape, finally by prepare into after milling train trace tube reducing diameter be 1.6,2.0,3.0, the Zn-14Al-0.7Mg-0.3Re Spray Wire of 4.0mm.

In sum, it is only presently preferred embodiments of the present invention, not being used for limiting scope of the invention process, all equalizations done according to the shape described in the claims in the present invention scope, structure, feature and spirit change and modify, and all should be included in scope of the presently claimed invention.

Claims (4)

1. a hot spray wire, including crust and core, it is characterized in that, described crust by zinc, aluminum, rhenium alloy make, described core is made up of magnalium, in described hot spray wire, in parts by weight, Al is 13��15%, and Mg is 0.5��1.0%, Re is 0.1��0.5%, and surplus is zinc and inevitable impurity; Described magnalium is Al-5Mg alloy, described zinc, aluminum, rhenium alloy be Zn-0.8Al-0.35Re alloy.

2. hot spray wire according to claim 1, it is characterised in that described Zn-0.8Al-0.35Re alloy is stoichiometrically to add Al-Re intermediate alloy in the Zn of fusing to be prepared from.

3. hot spray wire according to claim 1, it is characterised in that the diameter of described hot spray wire is 1.6��4.0mm.

4. the preparation method of a hot spray wire, it is characterised in that comprise the steps:

Zn-0.8Al-0.35Re alloy strip steel rolled stock is rolled into U-shaped band, and described Zn-0.8Al-0.35Re alloy is zinc, aluminum, rhenium alloys;

Described U-shaped band adds Al-5Mg B alloy wire;

U-shaped strip-rolling containing Al-5Mg B alloy wire is become O shape silk material;

Described O shape silk material being carried out tube reducing and obtains Zn-14Al-0.7Mg-0.3Re spraying wire, in described Zn-14Al-0.7Mg-0.3Re, Re is rhenium.