CN101545088A

CN101545088A - Iron-based flux-cored electric arc spray-melting wire

Info

Publication number: CN101545088A
Application number: CN200910066891A
Authority: CN
Inventors: 任振安; 宣兆志; 姚庆君; 赵德春
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2009-05-04
Filing date: 2009-05-04
Publication date: 2009-09-30
Anticipated expiration: 2029-05-04
Also published as: CN101545088B

Abstract

The invention relates to an iron-based flux-cored electric arc spray-melting wire used for processing metal surfaces, and belongs to the technical field of metal surface material preparation and surface processing. The wire mainly comprises 50 to 65 percent of low-carbon steel strip and 35 to 50 percent of flux-cored alloy powder in percentage by weight, wherein the formulation of the flux-cored alloy powder comprises the following components in percentage by weight: 5 to 63 percent of high carbon chromium iron, 10 to 28 percent of boron iron, 10 to 30 percent of silicon iron, 0 to 6 percent of boron carbide, 4 to 8 percent of iron powder, 3 to 7 percent of manganese iron, 4 to 10 percent of titanium iron, and 2 to 8 percent of rare-earth silicon iron. A surface layer obtained by the proposal has good molding, the dilution rate is easy to control, the surface layer and a steel matrix are in metallurgical bonding, and the wire has the properties such as abrasion resistance, corrosion resistance, heat resistance and the like.

Description

A kind of iron-based flux-cored electric arc spray-melting wire

Technical field:

The present invention relates to the metallic surface work material, especially relate to the iron-based flux-cored electric arc spray-melting wire that the processing of a kind of metallic surface is used, belong to metallic surface material preparation and Surface-micromachining process field.

Background technology:

Spray fusing material commonly used is a self-fluxing alloy powder, in the spray fusing melting process, the composition of alloy can reduce the oxide film of self and base material, form low-melting borosilicate slag and be covered in the surface, deposite metal, prevent the oxidation of alloy and improve wettingly, make alloy and base material can obtain excellent metallurgical and combine.Self-fluxing alloy powder mainly contains Ni-based, cobalt-based and iron-based three big series according to chemical constitution, and fusing point is 1000-1100 ℃, is starkly lower than the temperature of fusion of steel, and durometer level is 20-55HRC, can improve hardness and wear resistance after adding wolfram varbide.Wherein nickel base powder is a nickel chromium triangle silicon boron alloy, and self-fluxing nature is good, has good over-all properties such as wear-resisting, anti-corrosion, heat-resisting and anti-oxidant, is most widely used.Fe-based self-fluxing alloy powder generally contains minor amount of nickel, and price is lower, and wear resistance is good, and certain heat-resisting, corrosion resisting property are arranged.Self-fluxing alloy powder can carry out remelting and inducting remolten in flame remolten, the stove after spraying, the upper layer that preparation has superperformance.

In order to enlarge the Application Areas of spray melting technology, we have developed " arc spray melting technology ", adopt arc spray process on metallic matrix, to prepare sprayed coating, with electric arc sprayed coating is heated then and make it fusing, metallic matrix top layer fusing simultaneously, mix under liquid state the deposite metal, obtains after temperature descends to have the certain tissue composition and the upper layer of performance.Novel iron-based flux-cored electric arc spray-melting wire is adopted in this technical requirements, and its material forms, composition and performance are all different with self-fluxing alloy powder.The medication core-wire material replaces the self-fluxing powder powder material, with the valuable nickel-base spraying smelting material of ferrous alloy replacement cheaply, has expanded the spray fusing material type, make spray melting technology can be used for electric arc spraying and remelting, reduce the spray fusing material cost, improve the spray fusing processing efficiency, the broadened application field.

Summary of the invention

The object of the present invention is to provide a kind of iron-based flux-cored electric arc spray-melting wire and cladding layer of using at metal surface by arc spray melting.The fusing point that this novel spray fusing material has self-fluxing alloy powder is low, character such as striping ability are arranged, but coating combines with metallic matrix well after the electric arc spraying, help reducing the matrix thinning ratio in the electric arc reflow process, and the smooth rule of cladding layer of preparation, help reducing the post-production amount.

Technical solution of the present invention is as follows:

Adopt mild-carbon steel strip as silk material coating material, the medicine core material is made up of various powdered alloys, and powdered alloy is 35-50% with the proportion of composing (filling ratio) that coats mild-carbon steel strip, and medication core drawing welding wire equipment prepares this iron-based flux-cored electric arc spray-melting wire.Medicine core powdered alloy prescription is wt%: high carbon ferro-chrome 5-63%, ferro-boron 10-28%, ferrosilicon 10-30%, norbide 0-6%, iron powder 4-8%, ferromanganese 3-7%, ferrotianium 4-10%, rare earth ferrosilicon 2-8% etc.Spray fusing silk material can be used for electric arc spraying and obtain certain thickness sprayed coating, carries out the electric arc remelting then and handles, and realization is the upper layer of metallurgical binding with matrix.By changing the different proportionings and the filling ratio of flux-cored electric arc spray-melting wire interalloy powder, obtain the spray fusing upper layer of heterogeneity, tissue and performance.After carrying out arc spray melting processing with above-mentioned iron-based medicine core-wire material, the cladding metal ingredient scope that obtains is wt%:0.6-5.2%C, 5-28%Cr, 0.8-2.9%Si, 0.5-2.2%B, 0.3-1.8%Mn, trace Ti and rare earth element, Fe surplus, hardness is HRC30-65, has good performance such as wear-resisting, anti-corrosion, heat-resisting.

Technological core of the present invention is to design the prescription of flux-cored electric arc spray-melting wire, and this spray fusing silk material both can carry out electric arc spraying and form sprayed coating, can carry out the electric arc remelting to sprayed coating again and handle, and obtains to satisfy the spray fusing upper layer of service requirements.After the electric arc spraying sprayed coating is carried out arc-melting, the upper layer moulding of acquisition is good, is easy to control thinning ratio, with steel matrix be metallurgical binding, have performances such as wear-resisting, anti-corrosion and heat-resisting.Spray fusing silk material of the present invention can be widely used in the reparation and the manufacturing of the various roller class part surface wear-resistant layers of enterprises such as Steel Plant, cement mill, power station, helps reducing cost, increasing the service life.

Description of drawings

Fig. 1 adopts mild-carbon steel strip 60%, the arc spray melting layer microstructure of medicine core powdered alloy 40%;

Fig. 2 adopts mild-carbon steel strip 65%, the arc spray melting layer microstructure of medicine core powdered alloy 35%;

Fig. 3 adopts mild-carbon steel strip 50%, the arc spray melting layer microstructure of medicine core powdered alloy 50%.

Embodiment:

For the ease of understanding the present invention, especially exemplified by following examples.Its effect is understood that it is to explaination of the present invention but not to any type of restriction of the present invention.

Embodiment 1

Mild-carbon steel strip 60%, medicine core powdered alloy 40%, medicine core powdered alloy prescription is: high carbon ferro-chrome 46%, ferro-boron 14%, ferrosilicon 16%, norbide 3%, iron powder 8%, ferromanganese 5%, ferrotianium 4%, rare earth ferrosilicon 4%.Make iron-based flux-cored electric arc spray-melting wire through the specific equipment drawing, use common electric arc spraying equipment, obtaining thickness at 45 surface of steel plate is the sprayed coating of 2mm.Carry out remelting with argon welder then and handle, obtain the upper layer that thickness is 1.8mm, good with matrix bond, the cladding metal ingredient is: (wt%): 3.2%C, 18%Cr, 1.6%Si, 1.2%B, 1.0%Mn, Fe surplus.Arc spray melting layer hardness is HRC56, and microstructure is ledeburite and carbon, boride (consulting Fig. 1), and suitable requirement has clad steel plate manufacturing, the preparation of machinery part surface wearing layer of excellent abrasive resistance.

Embodiment 2

Mild-carbon steel strip 65%, medicine core powdered alloy 35%.Medicine core powdered alloy prescription is: high carbon ferro-chrome 5%, ferro-boron 28%, ferrosilicon 30%, iron powder 6%, norbide 6%, ferromanganese 7%, ferrotianium 10%, rare earth ferrosilicon 8%.Make iron-based flux-cored electric arc spray-melting wire through the specific equipment drawing, use common electric arc spraying equipment, obtaining thickness at the Q235 surface of steel plate is the sprayed coating of 2.6mm.Carry out remelting with argon welder then and handle, obtain the upper layer that thickness is 2.3mm, good with matrix bond, the cladding metal ingredient is: (wt%): 0.6%C, 5%Cr, 2.9%Si, 2.2%B, 1.8%Mn, Fe surplus.Arc spray melting layer hardness is HRC30, and microstructure is troostite and carbon, boride (consulting Fig. 2), and suitable requirement has the surface wear-resistant layer preparation than the machinery part surface reparation of high-wearing feature and new part.

Embodiment 3

Mild-carbon steel strip 50%, medicine core powdered alloy 50%, medicine core powdered alloy prescription is: high carbon ferro-chrome 63%, ferro-boron 10%, ferrosilicon 10%, iron powder 4%, ferromanganese 3%, ferrotianium 8%, rare earth ferrosilicon 2%.Make iron-based flux-cored electric arc spray-melting wire through the specific equipment drawing, use common electric arc spraying equipment, obtaining thickness at 45 surface of steel plate is the sprayed coating of 1.8mm.Carry out remelting with argon welder then and handle, obtain the upper layer that thickness is 1.6mm, good with matrix bond, the cladding metal ingredient is: (wt%): 5.2%C, 28%Cr, 0.8%Si, 0.5%B, 0.3%Mn, Fe surplus.Arc spray melting layer hardness is HRC65, and microstructure is ledeburite and carbon, boride (consulting Fig. 3), and suitable requirement has the machinery part surface wearing layer preparation of high-wearing feature.

Claims

1, a kind of iron-based flux-cored electric arc spray-melting wire, it is characterized in that, mainly be made of mild-carbon steel strip wt%:50-65% and medicine core powdered alloy wt%:35-50%, its Chinese medicine core powdered alloy prescription is wt%: high carbon ferro-chrome 5-63%, ferro-boron 10-28%, ferrosilicon 10-30%, norbide 0-6%, iron powder 4-8%, ferromanganese 3-7%, ferrotianium 4-10%, rare earth ferrosilicon 2-8%.