CN104028743A - Ferrochromium-based powder core wire and preparing method and application thereof - Google Patents
Ferrochromium-based powder core wire and preparing method and application thereof Download PDFInfo
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Abstract
The invention provides a ferrochromium-based powder core wire and a preparing method and application thereof. The ferrochromium-based powder core wire is made by making a stainless steel band be coated with a powder core, wherein the powder core is formed by mixing, by weight, 40%-60% of Cr, 5%-15% of B, 1%-5% of Si, 1%-5% of W, 2%-10% of Nb and the balance Fe which are all powder; the weight ratio of the powder core to the stainless steel band is (0.43-0.67) to 1; when a ferrochromium-based amorphous coating is prepared by adopting the electric arc spraying technique, oil removing and rust removing processing needs to be performed on the surface of a base body firstly, and then sand blasting and other preprocessing are performed. The ferrochromium-based powder core wire can be used for the ferrochromium-based amorphous coating which is high in amorphous content and hardness and excellent in corrosion resistant and abrasion resistant performance, and the coating is particularly suitable for site construction of large steel structures and the like and can be applied to various industrial fields like corrosion prevention and abrasion resistance.
Description
technical field
The invention belongs to the field of thermal spray in Materials Processing Engineering, be specifically related to a kind of ferrochrome original washing powder core-wire material and its preparation method and application.
background technology
Amorphous material, due to the defect not having in the crystalline materials such as crystal boundary, precipitated phase and component segregation, therefore has very excellent corrosion resistance.Compared with traditional crystalline state material, the possibility that is caused adjacent thing to produce galvanic effect between mutually by the difference of composition and crystal structure greatly reduces in amorphous material.For can passivating material, the corrosion resistance of material be generally controlled by the passivating film of one deck even structure densification forming on the surface of material.Due to the uniformity of structure and composition, amorphous material has been shown excellent corrosion resistance in the corrosive environment of various harshnesses.Z. the people such as Zhou has studied Fe
48cr
15mo
14c
15b
6y
2non-crystalline material is respectively at H
2sO
4, electrochemical corrosion behavior in HCl, NaCl and NaOH solution, found that non-crystalline material all shows excellent corrosion resistance in acid-alkali salt environment, and amorphous content has material impact to the corrosion resistance of coating.Content of amorphous is higher, and corrosion resistance is better.（Surface?and?Coatings?Technology,?2009,?204(5),?p.?563-570）。F. the people such as Otsubo studies discovery, and Fe-10%Cr-10%Mo-8%P-2%C non-crystalline material is at H
2sO
4can all be better than 316L stainless steel with the resistance to electrochemical corrosion in HCl solution, the content of amorphous phase is to affect the most important factor of material corrosion resistance (Journal of Thermal Spray Technology simultaneously, 2000,9 (4), p. 494-498).D. the people such as Zois has studied the electrochemical corrosion behavior of Fe-18.3Cr-7.7Mo-1.6W-1.8Mn-14.9B-3.6C-2.6Si non-crystalline material in NaCl solution, also obtained similar result (Journal of Alloys and Compounds, 2010,504(S1) p. 283-287).As can be seen here, the content of amorphous phase on the corrosion resistance impact of material significantly.Therefore,, how by rational Composition Design with select suitable effective preparation method to improve the content of amorphous phase in amorphous material, the raising of amorphous material corrosion resistance is had to important theory significance and actual application value.
Fe-based amorphous material has excellent mechanical property and corrosion resistance, but the bulk amorphous materials size that adopts the methods such as traditional copper mold casting to prepare is little, expensive, material needs there is great cooling velocity in process of setting, preparation non-crystalline material brittleness at room temperature large, be unfavorable for the drawbacks limit such as processing its in industrial application.Plasma spray technology is by adopting different thermal source (high-temperature fuel gas, plasma, high-temperature electric arc etc.) that sprayed on material is quickly heated up to fusing or semi-molten state, and forms the method for coating to the pretreated matrix surface of process with certain speed jet deposition.Adopt plasma spray technology, repair or strengthening workpiece surface, prepare the function of surface coating that is better than bulk material performance, become one of key technology of development of modern industry.Wherein, HVAS, due to features such as equipment are simple, easy to operate, efficiency is high, cost is low, coating performance is excellent, is widely used industrial, is particularly useful for Large Steel iron construction site operation.There are some researches show, the cooling velocity in quick cooled and solidified process of the sprayed on material in arc spray process after fusing can reach 10
5k/s, forms required critical cooling rate higher than most of amorphous phase.Therefore, adopt rational Composition Design, just can prepare amorphous coating.Adopt arc spraying technology to prepare Fe base amorphous coating and greatly widened the industrial applicability of non-crystalline material, therefore become the focus of research.But owing to being subject to the impact of the oxidation behavior of molten particles in spraying process, and because material composition design need further optimization, in the electric arc spraying amorphous coating of therefore reporting at present, the content of amorphous phase is often lower.Such as utilizing electric arc spraying, the people such as Guo Jinhua prepare Fe
59.5cr
16.2wC
3.0mn
0.3b
20.2si
0.6amorphous coating, its content of amorphous is about 56%(" Acta Metallurgica Sinica " 2007 43(7): 780-784); Fu Binyou etc. utilize FeCrNiBMnSiCP coating content of amorphous prepared by electric arc spraying to be about 55.3%(" material heat treatment journal " 2008,29(3): 159-162); The SHS7170(Journal of Thermal Spray Technology that Nanosteel company of the U.S. develops in recent years, 2005,14 (2), p. 196-204) and SHS 8000(Journal of Thermal Spray Technology, 2010,19 (5), p. 950-957) arc spraying coating content of amorphous is about 70% left and right.Cheng Jiangbo etc. have successfully prepared a kind of FeNiCrBSiNbAl electric arc spraying amorphous coating, its content of amorphous approximately 80%, but the lower (Cheng Jiangbo etc. of its Cr content; A kind of powder cored filament material for high content of amorphous wear-and corrosion-resistant coating: Chinese .102181814A[P]. 2011-09-14).In order to improve the corrosion resistance of arc spraying coating and to extend service life of workpiece, the Fe-based amorphous material of preparing a kind of high content of amorphous by rational Composition Design has very important theory and engineering significance.
summary of the invention
the technical problem solving:for the problems referred to above, the invention provides a kind of ferrochrome original washing powder core-wire material and its preparation method and application.It is high that this coating prepared by the present invention has content of amorphous, non crystalline structure Heat stability is good (start crystallization temperature higher than 600 DEG C), the feature such as oxide content is low, has excellent wear-resistant decay resistance, and preparation cost is low.
technical scheme:a kind of ferrochrome original washing powder core-wire material, made by stainless steel band coated composite powder core, described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 40-60 % Cr, 5-15 % B, 1-5 % Si, 1-5 % W, 2-10 % Nb, surplus are Fe; The weight ratio of powder core and stainless steel band is (0.43 ~ 0.67): 1.
Powder core composition weight percent content scope described above is as follows: 40-55% Cr, 10-15 % B, 1-5% Si, 1-5% W, 5-10 % Nb, surplus are Fe.
Powder core composition weight percent content scope described above is as follows: 40-50 % Cr, 10-15 % B, 3-5 % Si, 1-5 % W, 5-10 % Nb, surplus are Fe.
Stainless steel band described above is made up of 304L stainless steel, 430L stainless steel or 316L stainless steel.
The preparation method of a kind of ferrochrome original washing powder core-wire material described above, comprises the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 5-10h, obtains compound, and wherein the volume ratio of alcohol and powder is 2:5-7:10, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 5:1-10:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 5-10 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
A kind of ferrochrome original washing powder core-wire material described above is in the application of preparing in chromium iron-based amorphous coating.
A kind of ferrochrome original washing powder core-wire material described above, in the application of preparing in chromium iron-based amorphous coating, comprises the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
1. pair matrix surface carries out pretreatment: after matrix surface degreasing and rust removal, be under 0.7-0.8 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
2. powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: spray voltage 32-42 V, spraying current 160-220 A, spray distance 100-300 mm, compressed air pressure 0.6-0.7 Mpa; A kind of ferrochrome original washing powder core-wire material described above is in the application of preparing in chromium iron-based amorphous coating, the technological parameter that electric arc spraying equipment is set in described step 1 is: spray voltage 38-40 V, spraying current 180-200A, spray distance 200 mm, compressed air pressure 0.65 Mpa.
beneficial effect:a kind of powder cored filament material of the present invention and its preparation method and application, has the following advantages:
1. by reasonably allocating the ratio between little atom (B, C, Si etc.) and thick atom (Nb, W etc.), make the composition of powder cored filament material there is atom mispairing largely, and there is larger negative enthalpy of mixing between (Nb, the W etc.) thick atom adding and (B, C, Si etc.) little atom, thus, in the melt that thick atom forms after powder cored filament material melts, easily form skeleton structure and hinder the diffusion of other elements, melt after powder cored filament material is dissolved easily forms close heap topological structure, and then promotes the formation of amorphous nano crystal structure.
2. for the lower feature of Cr content in current powder cored filament material, in order to improve the corrosion resistance of the coating after spraying, in this powder cored filament material, the Cr content of powder core is up to 40 ~ 60 wt. %.
3. adopt existing HVAS, can prepare the chromium iron-based amorphous coating of protoxide content, porosity≤3 % on low carbon steel substrate surface;
4. the chromium iron-based amorphous coating amorphous content preparing approaches 95 %, bond strength>=50 Mpa; Microhardness is at 800 HV
0.3above.
5. in chromium iron-based amorphous coating, the heat endurance of amorphous phase is high, and amorphous phase starts crystallization temperature and reaches more than 600 DEG C.
6. chromium iron-based amorphous coating has excellent resistance to electrochemical corrosion energy, and in the NaCl solution that coating is 3.5 in weight percent concentration time, its corrosion potential is about-0.5 V, higher than electrodeposited chromium layers; Passive current density is 10
-5-10
-6between A, chromium coating is not found passivation phenomenon.
brief description of the drawings
Fig. 1 is the X ray diffracting spectrum of the chromium iron-based amorphous coating of embodiment 1,2,5 preparations, and as shown in the figure, coating is made up of amorphous phase.
Fig. 2 is the microstructure figure of the chromium iron-based amorphous coating prepared of embodiment 1, and as shown in the figure, coating densification is smooth, and porosity is low, and oxide content is few, and coating is combined closely with matrix.
Fig. 3 is the differential thermal analysis curve of the chromium iron-based amorphous coating prepared of embodiment 1, and as shown in the figure, the glass transformation temperature of coating is 590.4 DEG C, and starting crystallization temperature is 636.3 DEG C.
Fig. 4 is the microhardness curve map of the chromium iron-based amorphous coating prepared of embodiment 1, as shown in the figure, is coated with the microhardness value of layer cross section higher than 800 HV
300, from coating/basal body interface to coating surface, the hardness number of coating is evenly distributed, and coating internal organizational structure even compact is described.
Fig. 5 is the electrokinetic potential polarization curve in chromium iron-based amorphous coating prepared by the embodiment 1 NaCl solution that is 3.5 in weight percent concentration, and as shown in the figure, the corrosion potential of coating is about-0.5 V, higher than electrodeposited chromium layers; Passive current density is 10
-5-10
-6between A, chromium coating is not found passivation phenomenon, explanation thus, and the corrosion resistance of coating is better than electrodeposited chromium layers.
Detailed description of the invention
Further illustrate a kind of ferrochrome original washing powder core-wire material of the present invention and its preparation method and application below by embodiment, but the present invention is not limited in following embodiment.
The crust of the powder cored filament material in present embodiment is selected stainless steel band, is of a size of 12(wide) × 0.3(is thick) mm.
In present embodiment, matrix is selected mild steel, and bond strength sample is prepared tensile sample according to the specimen size of defined in GB8642-88.Adopt DT2000 image analysis software to measure the porosity of coating according to gray level method.Adopt HXD-1000TC microhardness testers to measure the microhardness that is coated with layer cross section, selected load is respectively 100 g and 300 g, and the load duration is 15 s.By verdon method, XRD diffraction pattern is carried out to Pseud-voigt Function Fitting, calculate amorphous content in coating.
embodiment 1
A kind of ferrochrome original washing powder core-wire material, is made up of stainless steel band coated composite powder core, and described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 45 % Cr, 12 % B, 4 % Si, 2 % W, 10 % Nb, surplus are Fe.
Stainless steel band is selected 304L stainless steel band, and the weight ratio of powder core and stainless steel band is 0.43:1.
The preparation method of ferrochrome original washing powder core-wire material, comprises the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 5 h, obtain compound, and wherein the volume ratio of alcohol and powder is 0.4:1, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 5:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 5 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
Ferrochrome original washing powder core-wire material, in the application of preparing in chromium iron-based amorphous coating, comprises the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
1. pair matrix surface carries out pretreatment: after matrix surface degreasing and rust removal, be under 0.7 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
2. powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: voltage 32 V; Electric current 160 A; Spray distance 100 mm; Compressed air pressure 0.6 MPa.
embodiment 2
A kind of ferrochrome original washing powder core-wire material, is made up of stainless steel band coated composite powder core, and described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 40 % Cr, 15 % B, 5 % Si, 1 % W, 2 % Nb, surplus are Fe.
Stainless steel band is selected 304L stainless steel band, and the weight ratio of powder core and stainless steel band is 0.49:1.
The preparation method of ferrochrome original washing powder core-wire material, comprises the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 6 h, obtain compound, and wherein the volume ratio of alcohol and powder is 0.46:1, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 6:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 7 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
Ferrochrome original washing powder core-wire material, in the application of preparing in chromium iron-based amorphous coating, comprises the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
1. pair matrix surface carries out pretreatment: after matrix surface degreasing and rust removal, be under 0.75 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
2. powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: voltage 34 V; Electric current 180 A; Spray distance 200 mm; Compressed air pressure 0.65 MPa.
embodiment 3
A kind of ferrochrome original washing powder core-wire material, is made up of stainless steel band coated composite powder core, and described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 50 % Cr, 5 % B, 1 % Si, 3 % W, 10 % Nb, surplus are Fe.
Stainless steel band is selected 304L stainless steel band, and the weight ratio of powder core and stainless steel band is 0.55:1.
The preparation method of ferrochrome original washing powder core-wire material, comprises the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 7 h, obtain compound, and wherein the volume ratio of alcohol and powder is 0.52:1, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 7:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 10 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
Ferrochrome original washing powder core-wire material, in the application of preparing in chromium iron-based amorphous coating, comprises the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
1. pair matrix surface carries out pretreatment: after matrix surface degreasing and rust removal, be under 0.8 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
2. powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: voltage 36 V; Electric current 200 A; Spray distance 300 mm; Compressed air pressure 0.7 MPa.
embodiment 4
A kind of ferrochrome original washing powder core-wire material, is made up of stainless steel band coated composite powder core, and described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 60 % Cr, 10 % B, 3 % Si, 1 % W, 5 % Nb, surplus are Fe.
Stainless steel band is selected 430L stainless steel band, and the weight ratio of powder core and stainless steel band is 0.61:1.
The preparation method of ferrochrome original washing powder core-wire material, comprises the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 8 h, obtain compound, and wherein the volume ratio of alcohol and powder is 0.58:1, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 8:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 5-10 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
Ferrochrome original washing powder core-wire material, in the application of preparing in chromium iron-based amorphous coating, comprises the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
1. pair matrix surface carries out pretreatment: after matrix surface degreasing and rust removal, be under 0.78 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
2. powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: voltage 38 V; Electric current 180 A; Spray distance 200 mm; Compressed air pressure 0.68 MPa.
embodiment 5
A kind of ferrochrome original washing powder core-wire material, is made up of stainless steel band coated composite powder core, and described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 45 % Cr, 10 % B, 3 % Si, 5 % W, 8 % Nb, surplus are Fe.
Stainless steel band is selected 316L stainless steel band, and the weight ratio of powder core and stainless steel band is 0.67:1.
The preparation method of ferrochrome original washing powder core-wire material, comprises the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 10 h, obtain compound, and wherein the volume ratio of alcohol and powder is 7:10, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 10:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 10 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
Ferrochrome original washing powder core-wire material, in the application of preparing in chromium iron-based amorphous coating, comprises the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
1. pair matrix surface carries out pretreatment: after matrix surface degreasing and rust removal, be under 0.8 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
2. powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: voltage 42 V; Electric current 200 A; Spray distance 200 mm; Compressed air pressure 0.7 MPa.
Porosity, bond strength and the amorphous content of chromium iron-based amorphous coating prepared by above-described embodiment 1～embodiment 5, its testing result is as follows:
Testing result
Claims (8)
1. a ferrochrome original washing powder core-wire material, made by stainless steel band coated composite powder core, it is characterized in that: described powder core composition is mixed by seven kinds of element powders, and its weight percent content scope is as follows: 40-60 % Cr, 5-15 % B, 1-5 % Si, 1-5 % W, 2-10 % Nb, surplus are Fe; The weight ratio of powder core and stainless steel band is (0.43 ~ 0.67): 1.
2. according to described a kind of ferrochrome original washing powder core-wire material of claim 1, it is characterized in that: described powder core composition weight percent content scope is as follows: 40-55% Cr, 10-15 % B, 1-5% Si, 1-5% W, 5-10 % Nb, surplus are Fe.
3. according to described a kind of ferrochrome original washing powder core-wire material of claim 1, it is characterized in that: described powder core composition weight percent content scope is as follows: 40-50 % Cr, 10-15 % B, 3-5 % Si, 1-5 % W, 5-10 % Nb, surplus are Fe.
4. according to a kind of ferrochrome original washing powder core-wire material of claim 1, it is characterized in that: described stainless steel band is made up of 304L stainless steel, 430L stainless steel or 316L stainless steel.
5. the preparation method of a kind of ferrochrome original washing powder core-wire material claimed in claim 1, is characterized in that comprising the steps:
(1) will after seven kinds of element powders mixing of powder core, add alcohol, in ball mill, wet mixing 5-10h, obtains compound, and wherein the volume ratio of alcohol and powder is 2:5-7:10, in ball mill, the weight ratio of stainless steel ball and mixed-powder is 5:1-10:1, drum's speed of rotation≤150r/min;
(2) compound is positioned in Rotary Evaporators, is dried to alcohol volatilization, more dried compound is put into temperature and dry 5-10 h lower than the baking oven of 60 DEG C, then cross 60-150 mesh sieve;
(3) stainless steel band is pressed into U-shaped, then adds above-mentioned powder core material in U-lag;
(4) by U-shaped stainless steel band closure, powder is coated wherein, make it by diameter be respectively in order: the wire-drawing die of 3.0 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2.0 mm, by road drawing, tube reducing, finally obtains the powder cored filament material that diameter is 2.0 mm.
6. a kind of ferrochrome original washing powder core-wire material claimed in claim 1 is in the application of preparing in chromium iron-based amorphous coating.
7. a kind of ferrochrome original washing powder core-wire material according to claim 6, in the application of preparing in chromium iron-based amorphous coating, is characterized in that comprising the following steps: adopt arc spraying technology to prepare the amorphous precursor body coating of high content of amorphous:
Matrix surface is carried out to pretreatment: after matrix surface degreasing and rust removal, be under 0.7-0.8 Mpa at air pressure, adopting granularity is 5-35 object corundum sand, carries out matrix surface sandblast alligatoring;
Powder cored filament material is packed in the wire feeder of electric arc spraying equipment, prepare amorphous precursor body coating at pretreated matrix surface, the technological parameter that electric arc spraying equipment is set is: spray voltage 32-42 V, spraying current 160-220 A, spray distance 100-300 mm, compressed air pressure 0.6-0.7 Mpa.
8. a kind of ferrochrome original washing powder core-wire material according to claim 6 is in the application of preparing in chromium iron-based amorphous coating, it is characterized in that: the described technological parameter that electric arc spraying equipment is set is: spray voltage 38-40 V, spraying current 180-200A, spray distance 200 mm, compressed air pressure 0.65 Mpa.
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Cited By (2)
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| CN113481458A (en) * | 2021-07-08 | 2021-10-08 | 中国人民解放军陆军装甲兵学院 | Wear-resistant particle wear-resistant powder core wire material and preparation method thereof, wear-resistant particle wear-resistant coating and preparation method thereof |
| CN114635055A (en) * | 2022-02-14 | 2022-06-17 | 江苏大学 | Powder core wire material preparation method for additive manufacturing by regulating and controlling powder particle size to obtain alloy with accurate components |
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| CN114635055B (en) * | 2022-02-14 | 2022-10-28 | 江苏大学 | Material preparation method of powder core wire material for additive manufacturing by regulating and controlling powder particle size to obtain alloy with accurate components |
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