CN104120376B - Corrosion-resistant roller and manufacture method thereof - Google Patents
Corrosion-resistant roller and manufacture method thereof Download PDFInfo
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- CN104120376B CN104120376B CN201410281085.5A CN201410281085A CN104120376B CN 104120376 B CN104120376 B CN 104120376B CN 201410281085 A CN201410281085 A CN 201410281085A CN 104120376 B CN104120376 B CN 104120376B
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Abstract
The present invention discloses a kind of corrosion-resistant roller, it is characterised in that, comprise matrix and it is coated on the corrosion-resistant finishes of matrix surface; Described corrosion-resistant finishes is obtained through spraying coating process by corrosion-resistant spray powders. Corrosion-resistant roller provided by the invention, can be widely used in pot galvanize or hot-dip aluminizing production line, uses as sinking roller, guide roller or supporting roll, has good corrodibility. And it is not the anti-corrosion layer of roll surface has good thermal shock resistance, easy to crack or depart from, it may also be useful to the qualities such as the life-span is long, zinc-plated, the aluminium steel plate of production are higher.
Description
Technical field
The present invention relates to corrosion-resistant roller and manufacture method thereof. In particular to the manufacture method of the roller of the molten corrosion of anti-Zn solution, aluminium liquid and aluminium zinc.
Background technology
Anti-corrosion steel ferrous products all to be carried out pot galvanize or hot-dip aluminizing mostly in the world at present. Pot galvanize or hot-dip aluminizing have become that anticorrosion of iron and steel aspect is applied the most substantially, method the most widely, are widely used in producing steel plate, steel band, steel wire, steel pipe, steel mesh and hardware. Through the workpiece of pot galvanize or hot-dip aluminizing, its life-span can improve 11��28 times.
In pot galvanize or hot-dip aluminizing production line, the temperature of zinc liquid, aluminium zinc solution reaches 620 DEG C usually, and in hot dip aluminum pot, the temperature of aluminium liquid reaches 760 DEG C usually. Parts each in zinc pot or aluminum pot (such as bearing, sinking roller, guide roller, supporting roll) are all had strong corrodibility by zinc liquid or aluminium liquid. In addition, owing to zinc liquid or aluminium liquid are to the corrosion of parts, product (such as band steel) can produce hard intermetallic compound particle in the abrasion of parts, zinc pot or aluminum pot, reducing the work-ing life of each parts, general steel band maintenance cycle that is zinc-plated or aluminum steel is on average fortnight. Simultaneously due to the product (Fe of corrosion formation2Zn series intermetallic compound) it is deposited in the zinc of melting, also can destroy the surface of coating, affect the quality of product. This kind of loss regularly caused with the irregular maintenance that stops production is very serious. If the generation of corrosion can be suppressed and reduces the formation of corrosion product, off-time, raising quality of coating will be reduced, reduce maintenance and change cost, the save energy of part, improve production environment. Along with the development of galvanizing technique, high aluminium zinc alloy coating has become the direction of domestic galvanizing technique development. And high aluminum zinc liquid phase is for traditional aluminium zinc liquid, temperature is higher, has stronger corrodibility, and the WC hot spray coating that tradition uses can not effectively resist the erosion of high temperature zinc aluminum solutions, and the work-ing life of coating reduces greatly.
Summary of the invention
It is an object of the invention to overcome deficiency of the prior art, it is provided that a kind of corrosion-resistant spray powders.
For realizing above object, the present invention is achieved through the following technical solutions:
Corrosion-resistant spray powders, it is characterised in that, comprise carbide and metal simple-substance; Described carbide comprises TiC and WC, also comprises one or both in TaC, NbC; Described metal simple-substance comprises Co, Ni and Cr; The weight of described carbide accounts for the 53%��74% of described corrosion-resistant spray powders gross weight, and all the other are metal simple-substance.
Preferably, the weight of Cr accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of Co and Ni accounts for the 20%��35% of described corrosion-resistant spray powders gross weight; The weight of WC accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of TaC and NbC accounts for the 5%��10% of spray coating powder gross weight; All the other are TiC.
Preferably, the corrosion of the molten liquid of anti-Zn solution, aluminium liquid and aluminium zinc.
It is a further object to provide the preparation method of a kind of corrosion-resistant spray powders.
For achieving the above object, the present invention is achieved through the following technical solutions:
The preparation method of corrosion-resistant spray powders, it is characterised in that, comprise the following steps:
A. add in TaC and NbC in TiC and WC one or both, load crystal vessel sealing after Homogeneous phase mixing; Crystal vessel is put into vacuum sintering furnace, regulates pressure to 20��40MPa, with ramp to 1600��1800 DEG C of 40��80 DEG C/min, be incubated 1��4 hour, make ceramic block; In said process, TiC and WC can produce WTiC2Compound phase, this compound has high rigidity, high antioxygenic property mutually. TaC and NbC all can strengthen oxidation-resistance and the high temperature abrasion resistance of TiC.
B. ceramic block is broken, ball milling, obtained ceramic particle;
C. by ceramic particle and Co metallic particles, Ni metallic particles, Cr metallic particles Homogeneous phase mixing, add binding agent and make slurry; Binding agent is adhesives conventional in industry. After spray method granulation, sintering, plasma spheroidization, sub-sieve obtain corrosion-resistant spray powders. The WTiC generated in step a2Compound phase, can improve Co, Ni to the wettability of carbide, carbide and metal simple-substance can be overcharged and point contact, combine closely.
Preferably, in described step a, the particle diameter of TiC, WC, TaC or NbC is 1��2 ��m.
Preferably, in described step b, the particle diameter of obtained ceramic particle is 1��3 ��m.
Preferably, in described step c, the particle diameter of Co metallic particles, Ni metallic particles or Cr metallic particles is 1��5 ��m.
Preferably, the weight of Cr accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of Co and Ni accounts for the 20%��35% of described corrosion-resistant spray powders gross weight; The weight of WC accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of TaC and NbC accounts for the 5%��10% of spray coating powder gross weight; All the other are TiC.
Preferably, the corrosion of the molten liquid of corrosion-resistant spray powders anti-Zn solution, aluminium liquid and the aluminium zinc obtained.
It is a further object to provide a kind of corrosion-resistant finishes.
For achieving the above object, the present invention is achieved through the following technical solutions:
Corrosion-resistant finishes, it is characterised in that, obtain through spraying coating process by above-mentioned corrosion-resistant spray powders, it is coated on matrix surface.
Preferably, the corrosion of the molten liquid of anti-Zn solution, aluminium liquid and aluminium zinc.
It is a further object to provide the preparation method of a kind of corrosion-resistant finishes.
For achieving the above object, the present invention is achieved through the following technical solutions:
The preparation method of corrosion-resistant finishes, it is characterised in that, it is injected into matrix surface after adopting spraying equipment to be melted by above-mentioned corrosion-resistant spray powders, forms the corrosion-resistant finishes being coated on matrix surface.
Preferably, the corrosion of the molten liquid of corrosion-resistant finishes anti-Zn solution, aluminium liquid and the aluminium zinc obtained.
It is a further object to provide a kind of corrosion-resistant roller.
For achieving the above object, the present invention is achieved through the following technical solutions:
Corrosion-resistant roller, it is characterised in that, comprise matrix and it is coated on the corrosion-resistant finishes of matrix surface; Described corrosion-resistant finishes is obtained through spraying coating process by above-mentioned corrosion-resistant spray powders.
Preferably, the corrosion of the molten liquid of anti-Zn solution, aluminium liquid and aluminium zinc.
It is a further object to provide the manufacture method of a kind of corrosion-resistant roller.
For achieving the above object, the present invention is achieved through the following technical solutions:
The manufacture method of corrosion-resistant roller, it is characterised in that, adopt spraying equipment to be injected into roll surface by after above-mentioned corrosion-resistant spray powders melting, form corrosion-resistant roller.
Preferably, the corrosion of the molten liquid of corrosion-resistant roller anti-Zn solution, aluminium liquid and the aluminium zinc obtained.
Corrosion-resistant spray powders provided by the invention, uniform component distribution, and there is very high sphericity. By this powder through the obtained corrosion-resistant finishes of spraying coating process, there is the molten corrosion of anti-Zn solution, aluminium liquid and aluminium zinc, especially there is the excellent properties of the zinc liquid of resistance to temperatures as high 870 DEG C, aluminium liquid and the molten corrosion of aluminium zinc. Effectively avoid zinc, Aluminum-aluminum alloy to melt corrosion roller body, extend the work-ing life of roller body, reduce the off-time, reduce maintenance and change cost, the save energy of part. The generation of corrosion product-intermetallic compound can be reduced or avoid simultaneously, effectively improve the surface quality of coating, it is to increase steel plate quality. The corrosion-resistant finishes obtained by corrosion-resistant spray powders provided by the invention, also has the molten liquid of good anti-Zn solution, aluminium liquid and aluminium zinc and adheres to, resistance to metallic corrosion, anti-oxidant, heat shock resistance, the performance such as high temperature resistant.
Prove through test, the gross weight of Co and Ni of corrosion-resistant spray powders accounts for the 20%��35% of corrosion-resistant spray powders gross weight, by the wear resistance of its obtained corrosion-resistant finishes, anti-Zn solution, aluminium liquid and aluminium zinc melt corrosion, the molten liquid of anti-Zn solution, aluminium liquid and aluminium zinc adheres to, and thermal shock resistance is optimum. And in corrosion-resistant finishes preparation process, powder deposition efficiency height. The weight percent content of Co and Ni is too high, can reduce the wear resistance of coating, and anti-Zn solution, aluminium liquid and aluminium zinc melt corrosion, and anti-Zn solution, aluminium liquid and aluminium zinc melt liquid adhesion property. The weight percent content of Co and Ni is too low, can reduce the thermal shock resistance of coating, powder deposition efficiency in the coating that slows down preparation process.
The gross weight of the Cr of corrosion-resistant spray powders accounts for the 6%��12% of corrosion-resistant spray powders gross weight, by the resistance to metallic corrosion of its obtained corrosion-resistant finishes, anti-Zn solution, aluminium liquid and aluminium zinc melt corrosion, and the molten liquid of anti-Zn solution, aluminium liquid and aluminium zinc adheres to, and antioxidant property is optimum. The weight percent content of Cr is too high, can reduce the resistance to metallic corrosion of coating, and anti-Zn solution, aluminium liquid and aluminium zinc melt corrosion, and anti-Zn solution, aluminium liquid and aluminium zinc melt liquid adhesion property. The weight percent content of Cr is too low, can reduce the antioxidant property of coating.
The preparation method of corrosion-resistant spray powders provided by the invention, technique is simple, and obtained corrosion-resistant spray powders component is even respectively, sphericity height. After granulation, sintering, ballization can improve powder property greatly.
The preparation method of corrosion-resistant finishes provided by the invention, technique is simple. Spraying can be completed, it is not necessary to more roll change, reduces the processing and manufacturing cost of steel mill at tradition roll surface. Spray material is powder shape, makes coating have good thickness evenness.
The corrosion-resistant roller being coated with corrosion-resistant finishes provided by the invention, can be widely used in pot galvanize or hot-dip aluminizing production line, uses as sinking roller, guide roller or supporting roll, has good corrodibility. And it is not the anti-corrosion layer of roll surface has good thermal shock resistance, easy to crack or depart from, it may also be useful to the qualities such as the life-span is long, zinc-plated, the aluminium steel plate of production are higher.
Accompanying drawing explanation
Fig. 1 is the corrosion-resistant roller front view in the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
As illustrated in fig. 1 and 2, it is corrosion-resistant roller 1. Corrosion-resistant roller 1 comprises the corrosion-resistant finishes 12 of matrix 11 and coated matrix surface. Matrix 11 is traditional sinking roller. Adopt thermic lance will to be injected into the surface of matrix 11 after corrosion-resistant spray powders melting, form corrosion-resistant finishes 12, the obtained corrosion-resistant roller 1 being coated with corrosion-resistant finishes 12. In each embodiment, the component weight percent content of corrosion-resistant spray powders is as shown in Table 1:
Table one
The preparation method of corrosion-resistant spray powders is as follows:
A. according to the weight in table two, add in TaC and NbC in TiC and WC one or both, load crystal vessel sealing after Homogeneous phase mixing. The particle diameter of TiC, WC, TaC or NbC is 1��2 ��m. Crystal vessel is put into vacuum sintering furnace, regulates pressure to lMPa, with the ramp of m DEG C/min to n DEG C, be incubated p hour, make ceramic block. The concrete numerical value of l, m, n, p is as shown in Table 3.
B. ceramic block is broken, ball milling, obtained ceramic particle. The particle diameter of obtained ceramic particle is 1��3 ��m.
C. press the weight in table two, in ceramic particle, add Co metallic particles, Ni metallic particles and Cr metallic particles that particle diameter is 1��5 ��m, and Homogeneous phase mixing, add binding agent and make slurry. After spray method granulation, sintering, plasma spheroidization, sub-sieve obtain corrosion-resistant spray powders. The component weight percent content of corrosion-resistant spray powders is as shown in Table 1.
Table two
Table three
The technical parameter of the corrosion-resistant roller in each embodiment is as shown in Table 4:
Table four
Data in form four are adopted and are obtained with the following method:
Fracture toughness property: adopt pressing in method to test, test loading force is 10kg, loading time is 15s, observe under the microscope and measure crack length and Vickers (Vickers) diagonal lines, undertaken calculating fracture toughness property (or breaking tenacity) K by following Palmqvist geometric formulaIC,
In formula, Hv is Vickers' hardness, and E is Young's modulus, and D is half diagonal lines of Vickers indentation, and a is impression length of fracture. Five points at least beaten by each sample, adopt ultrasonic technology to measure the Young's modulus of coating.
Microhardness: using microhardness instrument to measure, loading force is 300g, loading time 20s, measures the microhardness of coating.
Wear-resistant rate: use friction wear testing machine, rotating speed 200rpm, experimental pressure 30N, test stroke 200m, calculates the wear volume of coating unit pressure unit stroke, for weighing the abrasion resistance properties of coating after weighing. The internally coated wear volume of unit pressure unit stroke is more few, and high temperature wear resistant performance is more high, otherwise more poor.
Oxidation weight gain: the test block that four sides is coated with corrosion-resistant finishes being put into heat treatment furnace, is incubated 24h at being heated to 800 DEG C, taking-up cools and weighs, and the weightening finish of Units of Account time unit area coating, for weighing the antioxidant property of coating. The weightening finish of unit time unit surface coating is more few, and antioxidant property is more strong, otherwise more weak.
Thermal shock resistance properties: band coating test piece is heated to 900 DEG C of insulation 20min, observes disbonding situation after taking out Water Quenching. Repeat heating shrend, until disbonding area exceedes the 2% of the coating total area. By making disbonding area exceed the heating shrend number of times of the coating total area 2%, weigh the thermal shock resistance properties of coating. Heating shrend number of times is more many, and thermal shock resistance properties is more good, otherwise more poor.
The liquid of resistance to aluminium adhesivity and the corrosion of resistance to aluminium: the proof stick of peek parcel corrosion-resistant finishes, divide two groups, wherein in one group of overall high temperature aluminum liquid immersing 850 DEG C, stirs and takes out after 320 hours; In the overall high temperature aluminum liquid immersing 870 DEG C of another group, stir and take out after 320 hours. The adhesion amount of two groups of coatingsurface aluminium films is observed after cooling. Coatingsurface aluminium film adhesion amount is more few, and the liquid of the resistance to aluminium adhesivity of coating is more strong. The coating liquid of resistance to aluminium adhesion property by high to Low be divided into excellent, good, general, poor. Coatingsurface is excellent without the attachment of aluminium film. Again aluminium film is peeled off from proof stick, observe the dropping situations of coating. The area of the coating shedding on proof stick surface is more little, and the coating corrosion of resistance to aluminium is more strong. The coating corrosion of resistance to aluminium performance by high to Low be divided into excellent, good, general, poor. After aluminium film is peeled off, coating is without coming off for excellent.
Anti-Zn solution adhesivity and liquid zinc corrosion resistant: the proof stick of peek parcel corrosion-resistant finishes, divide two groups, wherein in one group of overall high temperature zinc liquid immersing 850 DEG C, stirs and takes out after 320 hours; In the overall high temperature zinc liquid immersing 870 DEG C of another group, stir and take out after 320 hours. The adhesion amount of two groups of coatingsurface zinc films is observed after cooling. Coatingsurface zinc film adhesion amount is more few, and the anti-Zn solution adhesivity of coating is more strong. Coating anti-Zn solution adhesion property by high to Low be divided into excellent, good, general, poor. Coatingsurface is excellent without the attachment of zinc film. Again zinc film is peeled off from proof stick, observe the dropping situations of coating. The area of the coating shedding on proof stick surface is more little, and coating liquid zinc corrosion resistant is more strong. Coating liquid zinc corrosion resistant performance by high to Low be divided into excellent, good, general, poor. After zinc film is peeled off, coating is without coming off for excellent.
Resistance to aluminium zinc melts liquid adhesivity and the molten corrosion of resistance to aluminium zinc: a proof stick for peek parcel corrosion-resistant finishes, divides two groups, wherein in one group of overall high temperature zinc molten aluminium alloy immersing 850 DEG C, stirs and takes out after 320 hours; In the overall high temperature zinc molten aluminium alloy immersing 870 DEG C of another group, stir and take out after 320 hours. The adhesion amount of two groups of coatingsurface aluminium zinc films is observed after cooling. Coatingsurface aluminium zinc film adhesion amount is more few, and the molten liquid adhesivity of the resistance to aluminium zinc of coating is more strong. The molten liquid adhesion property of the resistance to aluminium zinc of coating by high to Low be divided into excellent, good, general, poor. Coatingsurface is excellent without the attachment of aluminium zinc film. Again aluminium zinc film is peeled off from proof stick, observe the dropping situations of coating. The area of the coating shedding on proof stick surface is more little, and the molten corrosion of the resistance to aluminium zinc of coating is more strong. The molten corrosion performance of the resistance to aluminium zinc of coating by high to Low be divided into excellent, good, general, poor. After aluminium zinc film is peeled off, coating is without coming off for excellent.
Bonding strength: being sprayed on by corrosion-resistant finishes couple end face, end face area is S. By the bonding formation tension specimen of binding agent. Adopt omnipotent mechanics machine, to above-mentioned, couple is carried out tension test, ultimate load F during record coating shedding. Getting the mean value F ' of five tension test ultimate loads, anchoring strength of coating is F '/S.
As shown in Table 4, being coated with the corrosion-resistant roller of corrosion-resistant finishes, relatively take turns the roller with coated WC coating without the roller that coating is coated and take turns, the cementability of the molten liquid of the liquid of resistance to aluminium, zinc liquid, aluminium zinc, the liquid of resistance to aluminium, zinc liquid, aluminium zinc melt the corrodibility of liquid, greatly improve. Meanwhile, the roller wheel of more coated WC coating, the bonding strength of fracture toughness property, microhardness, wear-resistant rate, antioxidant property, thermal shock resistance properties and matrix improves all greatly.
Embodiment in the present invention, only for the present invention will be described, does not form the restriction to right, other replacements being substantially equal to that those skilled in that art can expect, all in protection domain of the present invention.
Claims (5)
1. corrosion-resistant roller, it is characterised in that, comprise matrix and it is coated on the corrosion-resistant finishes of matrix surface; Described corrosion-resistant finishes is obtained through spraying coating process by corrosion-resistant spray powders; Described corrosion-resistant spray powders comprises carbide and metal simple-substance; Described carbide comprises TiC and WC, also comprises one or both in TaC, NbC; Described metal simple-substance comprises Co, Ni and Cr; The weight of described carbide accounts for the 53%��74% of described corrosion-resistant spray powders gross weight, and all the other are metal simple-substance; The weight of Cr accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of Co and Ni accounts for the 20%��35% of described corrosion-resistant spray powders gross weight; The weight of WC accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of TaC and NbC accounts for the 5%��10% of spray coating powder gross weight; All the other are TiC.
2. corrosion-resistant roller according to claim 1, it is characterised in that, the corrosion of the molten liquid of anti-Zn solution, aluminium liquid and aluminium zinc.
3. the manufacture method of corrosion-resistant roller, it is characterised in that, adopt spraying equipment to be injected into roll surface by after corrosion-resistant spray powders melting, form corrosion-resistant roller; Described corrosion-resistant spray powders comprises carbide and metal simple-substance; Described carbide comprises TiC and WC, also comprises one or both in TaC, NbC; Described metal simple-substance comprises Co, Ni and Cr; The weight of described carbide accounts for the 53%��74% of described corrosion-resistant spray powders gross weight, and all the other are metal simple-substance; The weight of Cr accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of Co and Ni accounts for the 20%��35% of described corrosion-resistant spray powders gross weight; The weight of WC accounts for the 6%��12% of described corrosion-resistant spray powders gross weight; The gross weight of TaC and NbC accounts for the 5%��10% of spray coating powder gross weight; All the other are TiC.
4. the manufacture method of corrosion-resistant roller according to claim 3, it is characterised in that, the preparation method of described corrosion-resistant spray powders comprises the following steps:
A. add in TaC and NbC in TiC and WC one or both, the particle diameter of TiC, WC, TaC or NbC is 1��2 ��m; Crystal vessel sealing is loaded after Homogeneous phase mixing; Crystal vessel is put into vacuum sintering furnace, regulates pressure to 20��40MPa, with ramp to 1600��1800 DEG C of 40��80 DEG C/min, be incubated 1��4 hour, make ceramic block;
B. ceramic block is broken, ball milling, obtained ceramic particle; The particle diameter of ceramic particle is 1��3 ��m;
C. by ceramic particle and Co metallic particles, Ni metallic particles, Cr metallic particles Homogeneous phase mixing, the particle diameter of Co metallic particles, Ni metallic particles or Cr metallic particles is 1��5 ��m; Add binding agent and make slurry; After spray method granulation, sintering, plasma spheroidization, sub-sieve obtain corrosion-resistant spray powders.
5. the manufacture method of corrosion-resistant roller according to claim 3, it is characterised in that, the corrosion of the molten liquid of corrosion-resistant roller anti-Zn solution, aluminium liquid and the aluminium zinc obtained.
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| CN109182950B (en) * | 2018-09-14 | 2021-01-26 | 河北工业大学 | Preparation method of TiC/Co-Ni alloy composite coating |
| CN112844995A (en) * | 2020-12-31 | 2021-05-28 | 苏州淼胜环保科技有限公司 | Metal part surface machining process for improving corrosion resistance |
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| JPS6089557A (en) * | 1983-10-20 | 1985-05-20 | Showa Denko Kk | Powdered material for thermal spray and its manufacture |
| CN1793048A (en) * | 2005-11-03 | 2006-06-28 | 上海交通大学 | Large granular spherical metal ceramic nano composite spraying powder |
| CN101316941A (en) * | 2005-08-19 | 2008-12-03 | 杰出金属实业公司 | Hardmetal materials for high-temperature applications |
| CN101517109A (en) * | 2006-09-22 | 2009-08-26 | H.C.施塔克有限公司 | Metal powder |
| CN102586712A (en) * | 2012-03-11 | 2012-07-18 | 赣州章源钨业新材料有限公司 | Thermal spraying powder for preparing superhigh pressure sealing coating and preparation process thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6089557A (en) * | 1983-10-20 | 1985-05-20 | Showa Denko Kk | Powdered material for thermal spray and its manufacture |
| CN101316941A (en) * | 2005-08-19 | 2008-12-03 | 杰出金属实业公司 | Hardmetal materials for high-temperature applications |
| CN1793048A (en) * | 2005-11-03 | 2006-06-28 | 上海交通大学 | Large granular spherical metal ceramic nano composite spraying powder |
| CN101517109A (en) * | 2006-09-22 | 2009-08-26 | H.C.施塔克有限公司 | Metal powder |
| CN102586712A (en) * | 2012-03-11 | 2012-07-18 | 赣州章源钨业新材料有限公司 | Thermal spraying powder for preparing superhigh pressure sealing coating and preparation process thereof |
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