CN104195362A - Preparation method of high-boron and wear-resistant alloy - Google Patents
Preparation method of high-boron and wear-resistant alloy Download PDFInfo
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Abstract
The invention discloses a preparation method of a high-boron and wear-resistant alloy, belonging to the technical field of molten zinc corrosion wear materials. The preparation method comprises the steps of uniformly mixing 45-50% of boron and iron powder, 14-16% of chromium iron powder, 3-5% of molybdenum iron powder, 4-4.6% of pure nickel powder, 1.5-2.5% of WC powder and 25-30% of pure iron powder which are within the particle size range of 140-200 meshes; and carrying out laser cladding on a stainless steel base material by using a fiber laser and a synchronous powder feeding method to obtain a high-boron and wear-resistant alloy laser cladding layer, the surface of which has no cracks, inclusions and air holes and is smooth.
Description
Technical field
The present invention relates to a kind of anti-corrosion wear alloy preparation method, particularly a kind of high boron wear-resisting erosion alloy preparation method, belongs to corrosion material technical field.
Background technology
On galvanization production line, the critical rollers base parts such as sinking roller, stabilizing roller, straightening roll not only suffer strong corrosion in high-temperature fusion zinc liquid, and the roll surface movement velocity that transmits steel band is up to 35～40m/s, is very easily worn.Under comprehensive action at this aspect two, very easily there is the surface damages such as spot corrosion, pitting corrosion, polishing scratch, list edge in roll surface, causes above-mentioned part replacement frequent, reduced the operating rate of hot-galvanizing equipment.In order to improve the anti-zinc liquid high temperature corrosion wearing and tearing ability of material, Chinese invention patent CN 101748354A discloses a kind of spraying method of composite coating resisting corrosive wear of zinc solution, comprise WC-Co powder body material, MoB-Co powder body material and powder spraying device, it is characterized in that, the method comprises the steps: step 1, parts matrix surface to be sprayed is sprayed to front pre-treatment, adopts organic solvent cleaning, preheating, dehumidifying, grease removal and activation treatment; Step 2, the described powder spraying device of employing spray described WC-Co powder body material as prime coat at parts matrix surface to be sprayed, the powder granularity of described WC-Co powder body material is 25-65 μ m, the oxygen gas flow rate of described powder spraying device is set as 880-890 liter/min, kerosene flow velocity is set as 0.35-0.40 liter/min, spray distance is set as 300-390mm, thermospray is 60-100 gram/minute for powder Speed Setting, and gained coat-thickness is 0.15-0.20mm; Step 3, the described powder spraying device of employing spray described MoB-Co powder body material as working lining at WC-Co powder body material coatingsurface, the powder granularity of described MoB-Co powder body material is 25-65 μ m, the oxygen gas flow rate of described powder spraying device is set as 880-920 liter/min, kerosene flow velocity is set as 0.40-0.45 liter/min, spray distance is set as 300-390mm, thermospray is 60-100 gram/minute for powder Speed Setting, and gained coat-thickness is 0.07-0.10mm.Chinese invention patent CN 101215671B also discloses a kind of material capable of resisting zinc solution corrosive wear and manufacture method thereof, this material capable of resisting zinc solution corrosive wear chemical composition is (% by weight): 0.6-0.8C, 4.0-7.0B, 4.0-6.0Cr, 4.0-7.0Mo, 2.0-5.0W, 0.3-0.6Si, 0.3-0.6Mn, S < 0.05, P < 0.05, surplus is Fe.This invention material capable of resisting zinc solution corrosive wear utilizes electrosmelting, adopts castmethod moulding, and foundry goods carries out roughing after annealing, after 980-1020 ℃ of quenching and 520-580 ℃ of tempering, carries out precision work.This invention material capable of resisting zinc solution corrosive wear normal temperature hardness is high, reaches 62-65HRC, and the hardness in the time of 500 ℃ also reaches 56-58HRC.Bending strength has reached 900-1100MPa.Chinese invention patent CN103769813A also discloses the manufacture method of the anti-corrosion zinc-plated sinking roller of a kind of high rigidity, comprise the following steps: step 1, sandblast roughening before sinking roller body is welded is processed: by the sinking roller body sandblast of well cutting, then the sinking roller after sandblast is cleaned to scrubbing; Step 2, take wolfram varbide as hard phase at sinking roller surface-welding one deck, and cobalt-based metal is for connecting the anti-corrosion hardened layer of phase.This beneficial effect of the invention is: top layer corrosion-resistant material and body of roll matrix adopting welding process, the welding material that adopts is on the basis of cobalt-based material, to add wolfram varbide hard phase, can guarantee the red hardness of body surface, have again superpower wear resisting property, the layer of realizing organizes wear resisting property to be better than Wimet; Processing is simple, without main equipment, only needs simple welding set, to processing the front body of roll without harsh requirement, and weld layer dense structure, pore-free, oxide compounds etc. are mingled with, the space that does not exist zinc liquid to corrode.Chinese invention patent CN103741090A also discloses the spraying method of sinking roller and stabilizing roller top coat, relates in particular to a kind of high powder feeding rate resistance to high temperature corrosion on sinking roller and stabilizing roller surface, spraying method of abrasion-resistant coatings of being applied to.The method is carried out according to the following steps: the pre-treatment of workpiece, spraying operation, coatingsurface cleaning, roughness adjustment, sealing of hole are processed, transient equilibrium examination is checked, test package.During spraying, powder using efficiency is high, and powder feeding rate reaches 45%, and the combination of coating and matrix is all right, bonding strength >=70MPa; During spraying WC base coating, the WC particle oxygenolysis after spraying is few, and Binder Phase Co is also of value to the combination between coating endoparticle simultaneously, supplements the deficiency of coating toughness aspect, and coating hardness HV1 >=1050, guarantee that coating has higher hardness and good toughness; Sealing of hole after coating spraying is processed, and further fills the hole in coating, and porosity, lower than 0.5%, prevents that corrosive medium from entering corrosion workpiece by coating porosity.Chinese invention patent CN103233173A also discloses a kind of dip-roll sleeve and preparation method, the chemical composition of dip-roll cover material is (massfraction, %): 0.10 ?0.25C, 2.0 ?3.0B, 16.0 ?18.0Mn, 2.0 ?3.5Cr, 0.15 ?0.30N, S<0.03, P<0.03, Fe surplus.This invention material, axle sleeve utilizes electric furnace just can produce, the feature such as there is hardness and intensity is high, and toughness, solidity to corrosion and wear resistance are good, and manufacturing process is easy, low production cost.Chinese invention patent CN02851597A also discloses a kind of anti scuffing dip-roll sleeve and manufacture method thereof, concrete composition and massfraction % are as follows: 0.15 ?0.28C, 3.0 ?3.5B, 2.0 ?2.5Cr, 9.5 ?10.0W, 2.5 ?3.0Mo, 0.65 ?0.80Al, 1.20 ?1.50Si, 0.25 ?0.50Mn, 0.04 ?0.08Y, 0.06 ?0.10Ti, 0.06 ?0.10Nb, 0.03 ?0.06Ca, 0.05 ?0.08Mg, 0.08 ?0.12K, S<0.04, P<0.05, surplus is Fe.This invention anti scuffing dip-roll sleeve utilizes electrosmelting, adopts castmethod moulding, after quenching and tempering, carries out precision work.This invention anti scuffing dip-roll sleeve hardness is high, and wear resistance and obdurability and molten zinc corrosion resistant are functional.Chinese invention patent CN102206792A also discloses a kind of sinking roller of low alloy material, the shared weight percent of composition of its material therefor be C0.04 ?0.06, Si0.4 ?0.8, Mn3.5 ?4, P, S≤0.02, Cr12 ?13, Ni0.7 ?1.0, Mo0.8 ?1.2, all the other are Fe and inevitable impurity; Described sinking roller is prepared in accordance with the following steps: 1) using carbon-point, Pure Silicon Metal, manganese metal, nickel plate, ferrochrome, metal molybdenum and iron as raw material, after oven dry, put into medium-frequency induction furnace, the order adding is for first adding a certain amount of iron and carbon-point, after fusing, add nickel plate, manganese metal, metal molybdenum, finally add a certain amount of ferrochrome, when smelting temperature reach 1560 ?1580 ℃ time, add appropriate Pure Silicon Metal; The proportioning of wherein said raw material is in 1000kg material, carbon-point 0.1 ?0.12kg, Pure Silicon Metal 2 ?10kg, manganese metal 30 ?45kg, nickel plate 5 ?10kg, ferrochrome 169 ?215kg, metal molybdenum 5 ?15kg, iron surplus, wherein ferrochrome is the iron of chrome content 65%; 2) molten steel after melted, in ladle is poured the type tube that runs up into, takes out after cooling; 3) take out steel pipe and put into rapidly cooling 100 ℃ of following taking-ups of boiler tube insulation, after taking out, steel pipe carries out normalizing, normalized conditions be 980 ?1000 ℃, the every 25mm of steel pipe thickness is incubated 2 hours, air cooling; According to customer drawings, require machined steel cylinder size, process steel cylinder and sinking roller two ends roll neck assembly welding, weld preheating 200 ?250 ℃, wlding employing 410H; After integral body welds, carry out anneal, annealing conditions is 700 ℃, the every 25mm insulation of steel pipe thickness 3 hours; 4) after integrally annealed, sinking roller meets after drawing requirement by processing, and liquid penetrant inspection is carried out in its surface, proceeds to client and use after dynamicbalance test is qualified.Chinese invention patent CN102128208A also discloses a kind of preparation method of sink roller shaft sleeve with high bonding strength, the step that it is characterized in that the method comprise following some: one, processing stainless steel matrix; Two, machine finshing ceramic ring; Three, ceramic surface metallization, ceramic surface metallization layer is 50～400 microns, contain metal or nonmetal, and binding agent and auxiliary agent, raw material or simple substance powder, or the combination of these several simple substance powder, wherein, simple substance powder is several in Co, Si, Cu, Cr, B and W, binding agent is that NaCl and SnCl4 mix by quality 2:3, auxiliary agent is that polyoxyethylene glycol and rosin mix by quality 1:1, and the mass content of Co is between 40～60%, and the mass content of other metallic elements is all no more than 10%; Four, brazing stainless steel base and ceramic ring two portions; Five, be machined to size.
But that above-mentioned abrasion resistant alloy or existence are organized is thick, fragility large, easily peel off in using, or there is the poor deficiency that waits of high temperature resistance Abrasion properties.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of employing laser cladding method is provided, prepare fine microstructures, densification, the molten zinc corrosion resistant excellent Fe that weares and teares
2the high boron wear-resisting erosion alloy that B phase amount is many.
The object of the invention can realize by following processing step:
1. by powder diameter scope, be first that 140-200 order, massfraction are respectively 45～50% ferro-boron powder, 14～16% ferrochrome powder, 3～5% molybdenum-iron powder, 4～4.6% pure nickel powders, 1.5～2.5%WC powder and 25～30% straight iron powders and mix.
2. by the above-mentioned powder mixing, utilize optical fiber laser, adopt synchronous powder feeding system method, on stainless steel base material, carry out laser melting coating, powder feeding rate 18-20g/min, laser power is 3.0-4.5KW, sweep velocity is 8-10mm/s, and the number of clad layers is 8-10 layer.Finally can obtain surperficial flawless, be mingled with the high boron wear-resisting of pore and surfacing and lose Alloy by Laser cladding layer.
The chemical composition massfraction of ferro-boron powder is as mentioned above: 19.0～21.0%B ,≤0.5%C ,≤2%Si ,≤0.5%Al ,≤0.01%S ,≤0.1%P, surplus Fe.
The chemical composition massfraction of ferrochrome powder is as mentioned above: 60～65%Cr, 6.8～7.5%C ,≤3.0%Si ,≤0.05%S ,≤0.06%P, surplus Fe.
The chemical composition massfraction of molybdenum-iron powder is as mentioned above: 66.0～72.0%Mo ,≤1.5%Si ,≤0.10%S ,≤0.05%P ,≤0.10%Sb ,≤0.50%Sn, surplus Fe.
Laser cladding method of the present invention is prepared high boron wear-resisting erosion alloy, and alloy powder be take ferro-boron powder, straight iron powder and ferrochrome powder as main, wherein adds massfraction 45～50% ferro-boron powder, is mainly the power that utilizes laser input, obtains a fairly large number of Fe in cladding layer
2b phase, Fe
2the features such as it is high that B has hardness, the good and molten zinc corrosion resistant excellent performance of wear resistance are a kind of desirable anti-Zn solution abrasion phases.Adding massfraction 14～16% ferrochrome powder, is mainly to utilize chromium to be combined with carbon, obtains high rigidity Cr
7c
3phase, is conducive to carry heavy alloyed abrasion resistance.In addition, adding massfraction 3～5% molybdenum-iron powder, is mainly to utilize molybdenum solid solution in matrix, improves matrix hot hardness, and the raising of matrix hot hardness, can stop Fe
2b phase and Cr
7c
3in erosion process, peel off, thereby reach the Alloy Anti high temperature abrasion ability that improves.Add 1.5～2.5%WC powder, can improve resistance to abrasion.On this basis, also adding 4～4.6% pure nickel powders, is mainly to utilize nickel solid solution in matrix, is conducive to improve matrix plasticity.
Laser cladding method of the present invention is prepared in high boron wear-resisting erosion alloy process, by the alloy powder mixing, utilize optical fiber laser, adopt synchronous powder feeding system method, on stainless steel base material, carry out laser melting coating, when powder feeding rate is controlled at 18-20g/min, laser power control is built in 3.0-4.5KW, sweep velocity is controlled at 8-10mm/s, the number of clad layers is controlled at 8-10 layer, finally can obtain surperficial flawless, be mingled with and the hardness of pore and surfacing high (surpassing 850HV), the high boron wear-resisting erosion Alloy by Laser cladding layer that molten zinc corrosion resistant polishing machine is good.
The present invention compared with prior art has the following advantages:
1) high boron wear-resisting erosion alloy of the present invention adopts laser cladding method preparation, having overcome conventional cast method, to prepare high boron alloy boride size thick, the deficiency very easily ftractureing in casting and use procedure, has also overcome powder metallurgy process complex process, the deficiency that cost is high;
2) Fe in high boron wear-resisting erosion alloy of the present invention
2b phase amount reaches 55～55% (volume fractions), has excellent high temperature resistance corrosive wear of zinc solution ability, and under identical corrosive wear condition, its resisting corrosive wear of zinc solution energy force rate 316L stainless steel improves 6～8 times.
Embodiment
Below in conjunction with embodiment, the present invention is further described, but the present invention is not limited to following examples.
Embodiment 1:
Adopt laser cladding method to prepare high boron wear-resisting erosion alloy, concrete step of preparation process is:
1. by powder diameter scope, be first 140-200 order, massfraction is respectively 45% ferro-boron powder, and (the chemical composition massfraction of ferro-boron powder is: 19.04%B, 0.27%C, 1.33%Si, 0.20%Al, 0.008%S, 0.063%P, surplus Fe), (the chemical composition massfraction of ferrochrome powder is 16% ferrochrome powder: 62.15%Cr, 7.34%C, 2.07%Si, 0.028%S, 0.035%P, surplus Fe), (the chemical composition massfraction of molybdenum-iron powder is 3% molybdenum-iron powder: 69.38%Mo, 0.71%Si, 0.056%S, 0.041%P, 0.034%Sb, 0.26%Sn, surplus Fe), 4.6% pure nickel powder, 1.5%WC powder and 29.9% straight iron powder mix.
2. by the above-mentioned powder mixing, utilize IPG 6kW optical fiber laser, adopt synchronous powder feeding system method, on 316L stainless steel base material, carry out laser melting coating, powder feeding rate 18g/min, laser power is 3.0KW, and sweep velocity is 8mm/s, and the number of clad layers is 8 layers.Finally can obtain average hardness and reach 873.8HV, surperficial flawless, be mingled with the high boron wear-resisting erosion Alloy by Laser cladding layer with pore and surfacing.
Embodiment 2:
Adopt laser cladding method to prepare high boron wear-resisting erosion alloy, concrete step of preparation process is:
1. by powder diameter scope, be first 140-200 order, massfraction is respectively 50% ferro-boron powder, and (the chemical composition massfraction of ferro-boron powder is: 20.84%B, 0.25%C, 0.87%Si, 0.20%Al, 0.006%S, 0.071%P, surplus Fe), (the chemical composition massfraction of ferrochrome powder is 14% ferrochrome powder: 61.42%Cr, 7.10%C, 2.37%Si, 0.038%S, 0.045%P, surplus Fe), (the chemical composition massfraction of molybdenum-iron powder is 5% molybdenum-iron powder: 67.88%Mo, 0.92%Si, 0.063%S, 0.036%P, 0.037%Sb, 0.15%Sn, surplus Fe), 4% pure nickel powder, 2%WC powder and 25% straight iron powder mix.
2. by the above-mentioned powder mixing, utilize IPG 6kW optical fiber laser, adopt synchronous powder feeding system method, on 316L stainless steel base material, carry out laser melting coating, powder feeding rate 19g/min, laser power is 3.5KW, and sweep velocity is 9mm/s, and the number of clad layers is 9 layers.Finally can obtain average hardness and reach 892.0HV, surperficial flawless, be mingled with the high boron wear-resisting erosion Alloy by Laser cladding layer with pore and surfacing.
Embodiment 3:
Adopt laser cladding method to prepare high boron wear-resisting erosion alloy, concrete step of preparation process is:
1. by powder diameter scope, be first 140-200 order, massfraction is respectively 48% ferro-boron powder, and (the chemical composition massfraction of ferro-boron powder is: 20.14%B, 0.38%C, 1.15%Si, 0.33%Al, 0.007%S, 0.052%P, surplus Fe), (the chemical composition massfraction of ferrochrome powder is 15% ferrochrome powder: 64.17%Cr, 6.99%C, 2.34%Si, 0.041%S, 0.046%P, surplus Fe), (the chemical composition massfraction of molybdenum-iron powder is 4% molybdenum-iron powder: 69.50%Mo, 1.04%Si, 0.075%S, 0.048%P, 0.067%Sb, 0.38%Sn, surplus Fe), 4.3% pure nickel powder, 2.5%WC powder and 26.2% straight iron powder mix.
2. by the above-mentioned powder mixing, utilize IPG 6kW optical fiber laser, adopt synchronous powder feeding system method, on 316L stainless steel base material, carry out laser melting coating, powder feeding rate 20g/min, laser power is 4.5KW, sweep velocity is 10mm/s, and the number of clad layers is 10 layers.Finally can obtain average hardness and reach 883.1HV, surperficial flawless, be mingled with the high boron wear-resisting erosion Alloy by Laser cladding layer with pore and surfacing.
In high boron wear-resisting erosion alloy of the present invention, Fe2B phase amount reaches 55～55% (volume fractions), has excellent high temperature resistance corrosive wear of zinc solution ability, and under identical corrosive wear condition, its resisting corrosive wear of zinc solution energy force rate 316L stainless steel improves 6～8 times.High boron wear-resisting erosion alloy of the present invention adopts laser cladding method preparation, having overcome conventional cast method, to prepare high boron alloy boride size thick, the deficiency very easily ftractureing in casting and use procedure, also overcome powder metallurgy process complex process, the deficiency that cost is high, has good popularizing application prospect in pot galvanize field.
Claims (5)
1. a high boron wear-resisting erosion alloy preparation method, is characterized in that, adopts laser cladding method preparation, and concrete technology step is:
1. by powder diameter scope, be first that 140-200 order, massfraction are respectively 45～50% ferro-boron powder, 14～16% ferrochrome powder, 3～5% molybdenum-iron powder, 4～4.6% pure nickel powders, 1.5～2.5%WC powder and 25～30% straight iron powders and mix;
2. by the above-mentioned powder mixing, utilize optical fiber laser, adopt synchronous powder feeding system method, on stainless steel base material, carry out laser melting coating, powder feeding rate 18-20g/min, laser power is 3.0-4.5KW, sweep velocity is 8-10mm/s, and the number of clad layers is 8-10 layer; Finally can obtain surperficial flawless, be mingled with the high boron wear-resisting of pore and surfacing and lose Alloy by Laser cladding layer.
2. according to high boron wear-resisting erosion alloy preparation method described in claim 1, it is characterized in that, the chemical composition massfraction of ferro-boron powder is: 19.0～21.0%B ,≤0.5%C ,≤2%Si ,≤0.5%Al ,≤0.01%S ,≤0.1%P, surplus Fe.
3. according to high boron wear-resisting erosion alloy preparation method described in claim 1, it is characterized in that, the chemical composition massfraction of ferrochrome powder is: 60～65%Cr, 6.8～7.5%C ,≤3.0%Si ,≤0.05%S ,≤0.06%P, surplus Fe.
4. according to high boron wear-resisting erosion alloy preparation method described in claim 1, it is characterized in that, the chemical composition massfraction of molybdenum-iron powder is: 66.0～72.0%Mo ,≤1.5%Si ,≤0.10%S ,≤0.05%P ,≤0.10%Sb ,≤0.50%Sn, surplus Fe.
5. the high boron wear-resisting erosion alloy preparing according to the either method of claim 1-4.
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| CN111363966A (en) * | 2020-04-09 | 2020-07-03 | 莆田学院 | Zinc liquid corrosion wear resistant high-boron alloy material and preparation method thereof |
| CN112226722A (en) * | 2020-10-15 | 2021-01-15 | 西安特种设备检验检测院 | Laser alloying surface strengthening treatment method for pipeline steel |
| CN114959694A (en) * | 2022-06-27 | 2022-08-30 | 中南大学湘雅医院 | Stomach wall cutting machinery hand |
| CN114959694B (en) * | 2022-06-27 | 2023-11-17 | 中南大学湘雅医院 | Abdominal wall cutting manipulator |
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