CN102453902B - Method for preparing tungsten carbide hard alloy coating on surface of high-speed wire roller collar - Google Patents
Method for preparing tungsten carbide hard alloy coating on surface of high-speed wire roller collar Download PDFInfo
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- CN102453902B CN102453902B CN201010518946.9A CN201010518946A CN102453902B CN 102453902 B CN102453902 B CN 102453902B CN 201010518946 A CN201010518946 A CN 201010518946A CN 102453902 B CN102453902 B CN 102453902B
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Abstract
The invention discloses a method for preparing a tungsten carbide hard alloy coating on the surface of a high-speed wire roller collar. In the method, a metallurgy combined tungsten carbide hard alloy coating is formed at the hole pattern position of a common middle carbon alloy steel roller collar substrate in a cladding manner by a laser cladding technology and a synchronous powder feeding method. The method comprises the following process steps of: selecting a substrate of the roller collar; preparing a tungsten carbide hard alloy laser cladding material; and machining a working layer, performing surface cleaning, and performing laser cladding to form the tungsten carbide hard alloy coating on the surface of the roller collar. By the method, the total thermal fatigue resistance, impact resistance and corrosion resistance of the roller collar are improved, and the accidents of collar breaking due to insufficient impact rigidity of the conventional hard alloy are effectively reduced and even prevented.
Description
Technical field
The present invention relates to a kind of metallurgical equipment parts surface and prepare method that is wear-resisting, heat resistanceheat resistant coating, particularly relate to a kind of laser melting and coating technique that adopts and prepare the method for tungsten carbide hard alloy coating on high-speed wire rolling ring surface, belong to laser melting and coating technique field.
Background technology
The tungsten-cobalt carbide hard carbide roll ring of high-speed rod-rolling mill many employings powder metallurgy, it is high that collars has hot hardness, and wear resistance is good, but in use there is following obvious deficiency:
1. impelling strength is still not aobvious, and under the effect of fatigue loading, fatigue crack growth is rapid, and surface peels off even broken roller, and abscission ring phenomenon happens occasionally.
2. erosion resistance is not good enough, requires strict to water coolant pH value.
3. pair requirement on machining accuracy is high, and collars is installed must be very careful.
About the alternative novel material of conventional rigid alloy collars, the research and development of novel process never stopped, the inner ring as adopted the technique of hot isostatic pressing to carry out is steel, outer shroud is the composite ring of Wimet, this complex process, and internal stress is large, serious cracking.Adopt castmethod to carry out the manufacture of carbide roll ring, but the problem of casting aspect is also more.
Therefore, select the suitable technique preparing tungsten carbide hard alloy coating on high-speed wire rolling ring surface, making high-speed wire rolling ring surface carbonation tungsten hard alloy coating and substrate combinating strength is high, wear resisting property is good, the thickness of alloy coat is even, is the current problem urgently to be resolved hurrily in affiliated field.
Laser melting and coating technique, as the re-manufacturing technology of a kind of advanced person, obtains in recent years and promotes rapidly and widespread use.
The feature that laser melting and coating technique utilizes high energy laser beam focused energy high, instantaneously by preset at substrate surface or automatically send powdered alloy that put, that have specific physical, chemistry or mechanical property to melt completely with laser synchronization, base material part fusing simultaneously, form a kind of new composite shape matl, rapid solidification after laser beam flying, obtain the fine and close coating with matrix metallurgical binding, to reach the object recovering geometrical dimension and surface strengthening.
It is at present, a lot of about the patent and report utilizing laser melting and coating process Preparation equipment parts coated with wear-resisting alloy: such as,
Publication number is " the preparing wear-resisting heat resistanceheat resistant compound coating technique at crystallizer surface laser quick cladding " that the Chinese invention patent application of CN 1932082 provides, its feature is to utilize superpower laser, become the good toughness bottoming transition layer of metallurgical binding by laser rapid scanning at copper plate of crystallizer surface cladding with matrix, and prepare cobalt base alloy that is wear-resisting and heat resistanceheat resistant excellent property by laser wide-band cladding at bottoming alloy surface.
Publication number is " preparation method of laser fusion covered nickel base nanometer WC/Co precoated layer " that the Chinese invention patent application of CN1786272 provides, this preparation method comprises the following steps: 1. to weigh shellac and dehydrated alcohol by the shellac of every grammes per square metre and the dehydrated alcohol of 10 ~ 20 grammes per square metres, is then added in dehydrated alcohol by described shellac and makes binding agent; 2. as required in the ratio of the binding agent of every gram of nickel base nanometer WC/Co powder and 0.1 milliliter ~ 0.25 milliliter, weigh nickel base nanometer WC/Co powder and described binding agent and mix, stirring and make pre-gluing; 3. above-mentioned pre-gluing is coated in the workpiece surface treating Laser Cladding Treatment equably, makes precoated layer; 4. dry.Adopt homemade binding agent to prepare nickel base nanometer WC/Co precoated layer, and then adopt laser melting and coating process, prepared surface more smooth, finer and closely woven, essentially eliminate crackle and hole and be the nickel base nanometer WC/Co compound coating of metallurgical binding with matrix.
Publication number is " laser melting and coating process of hydraulic support column cylinder, piston rod wear-resisting erosion resistance coating " that the Chinese invention patent application of CN101338427 provides, comprise following technological process: first column cylinder, piston rod surface pre-treatment: under room temperature, column cylinder barrel, piston rod surface carry out oil removing, rust cleaning, and clean with alcohol washes; Then the selection of powdered alloy and the adjustment of automatic powder feeding device: select and there is good wear etch resistant properties and the iron(-)base powder good with the metallurgical consistency of matrix, main containing Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta, B in the composition of iron(-)base powder; The adjustment of last automatic powder feeding device: regulate automatic powder feeding device, automatic powder feeding head powdered alloy out is just in time dropped in laser molten pool, regulates powder sending quantity, makes the thickness of alloy powder coating reach 0.6-1.2mm.
Publication number is " the railroad switch sliding bed surface abrasion resistance non-corrosive alloy coated laser melting and coating process " that the Chinese invention patent application of CN101338425 provides, comprise following technological process: first slide plate surface preparation, namely at room temperature degreasing and rust removal is carried out to slide plate surface, and clean with alcohol washes; Then be the preset of powdered alloy, namely the surface of the slide plate after above-mentioned process is preset in until the iron-based of cladding, Ni-based or Co-based alloy powder, and adjust prealloyed powder with the floating rule with guide rail, make it to be evenly distributed on slide plate surface and there is suitable thickness, to meet the requirement of coat-thickness after cladding; Be finally light cladding and hardening slide plate, select gas CO
2laser apparatus, worktable is numerically-controlled machine, carries out laser melting coating strengthening on slide plate surface.
Publication number is " the pick-like bit denticle head laser fusing and coating wear-resistant coating reinforcing process " that the Chinese invention patent application of CN101338428 provides, and comprises following technological process: be first the pre-treatment of pick denticle head surface; Then be the selection of powdered alloy and the adjustment of automatic powder feeding device; It is finally pick head laser cladding wear alloy coat.
Though the technique scheme that prior art provides can utilize laser melting and coating process to carry out wear-resistant coating process to equipment component parts, obtain certain technique effect.Such as, but to other specific equipment unit, the special construction as high-speed wire rolling ring, the processing parameter that existing laser melting and coating process provides obviously can not adapt to.
Verification is retrieved: adopt laser melting and coating process to prepare tungsten carbide hard alloy coating on high-speed wire rolling ring surface, domesticly there is no precedent, also do not see relevant report abroad through the applicant.Therefore, find out suitable employing laser melting coating prepares tungsten carbide hard alloy coating processing parameter on high-speed wire rolling ring surface, still need those skilled in the art to make creationary research work further.
Summary of the invention
The object of the invention is to for prior art the problem preparing tungsten carbide hard alloy coating process difficulty on high-speed wire rolling ring surface, by Improvement repeatedly, give a kind of method preparing tungsten carbide hard alloy coating on high-speed wire rolling ring surface newly.The method adopts laser melting and coating technique to pass through synchronous powder feeding system, the tungsten carbide hard alloy coating of metallurgical binding is formed in common position, medium carbon alloy steel collars matrix pass place cladding, tungsten carbide hard alloy coating and traditional overall cobalt-carboloy of the cladding of collars working face are different, toughness phase intensity increases, and keeps the superior wear resistance of material.Owing to have employed laser melting coating composite manufacturing technology, the overall heat-resistant anti-fatigue of Wimet composite high speed wire rod collars surface energy raising collars, shock resistance, corrosion resistant performance, effectively reducing the accident even having stopped the abscission ring that conventional rigid alloy causes not because of impelling strength, is the replacement technique of existing cemented carbide powder SINTERING PRODUCTION carbide roll ring.
The technical scheme that the present invention provides is: this method preparing tungsten carbide hard alloy coating on high-speed wire rolling ring surface, is characterized in that technological process is as follows:
1, the matrix of collars is selected
The body material of collars is low-carbon alloy steel in 35CrMo, 40CrNiMo;
2, the preparation of carboloy laser cladding of material
A, chemical composition as the nickel-base alloy of bonding phase, be calculated in mass percent:
Carbon 0.05-0.3%, silicon 2-4%, boron 1-3%, chromium 0-8%, iron 0-8%, all the other are nickel,
B, wolfram varbide feature
Spherical cast tungsten carbide, granularity 40-70um,
C, powder proportions
Spherical cast tungsten carbide mass percent is 60-80%, and nickel-base alloy is bonding phase mass percent is 20%--40%,
Prepare on electronic balance by above-mentioned materials and ratio range, and carry out mixing more than 4 hours at meal mixer;
3, working lining mechanical workout and removing surface
Mechanical workout reserves the working lining thickness needed for laser melting coating, and carries out removing surface greasy dirt and rusty scale;
4, laser melting coating processing
1) selection of powdered alloy and the adjustment of automatic powder feeding device
According to the operating mode of roll, select as the nickel-base alloy of bonding phase, spherical cast tungsten carbide powder, regulate automatic powder feeding device powder feeding rate, to meet powder feeding rate needed for coat-thickness.
2) laser cladding technological parameter
The cladding of high power laser light arrowband
Condensing lens f=100 ~ 400
Cladding power P=3000 ~ 10000W
Spot diameter D=2 ~ 6mm
Cladding scan velocity V=200 ~ 1000mm/min
Overlapping rate 40 ~ 60%
The cladding of high power laser light broadband
Cladding power P=3000 ~ 10000W
Rectangular light spot length × wide=(2 ~ 10) mm × (1 ~ 2) mm
Cladding scan velocity V=100 ~ 800mm/min
Overlapping rate 40 ~ 60%
The powdered alloy that the present invention prepares voluntarily is the Harmony of the difference of higher wetting property that bonding and spherical cast tungsten carbide tool is high and the hot physical property of material due to nickel-base alloy, thus has thermal fatigue resistance and the heat wear resistance of excellent skill.
Compared with prior art, the invention has the beneficial effects as follows:
Adopt laser melting and coating technique by the method for synchronous powder feeding system, the tungsten carbide hard alloy coating of metallurgical binding is formed in common position, medium carbon alloy steel collars matrix pass place cladding, the tungsten carbide hard alloy coating toughness phase intensity of collars working face cladding increases, and keeps the superior wear resistance of material.The present invention is owing to have employed laser melting coating composite manufacturing technology, improve the overall heat-resistant anti-fatigue of cemented carbide composite roll collar, shock resistance, corrosion resistant performance, effectively reduce the accident even having stopped the abscission ring that conventional rigid alloy causes not because of impelling strength.
Embodiment
Embodiment 1
Laser melting coating tungsten carbide hard alloy coating manufactures high-speed wire rolling ring processing method containing following process:
1, the matrix of collars
The body material of collars is 40CrNiMo steel alloy
2, the preparation of carboloy laser cladding of material
A, nickel-base alloy are the chemical composition of bonding phase, are calculated in mass percent:
Carbon 0.08%, silicon 2.5%, boron 1.5%, chromium 3%, iron 3%, all the other are nickel,
B, wolfram varbide feature
Spherical cast tungsten carbide
C, powder proportions
Spherical cast tungsten carbide weight hundred number is 80%; Nickel-base alloy is bonding phase weight hundred number is 20%.
Prepare on electronic balance by above-mentioned materials and ratio range, and carry out mixing more than 4 hours at special meal mixer.
3, working lining mechanical workout and removing surface
The object of mechanical workout is in order to the working lining thickness needed for reserved laser melting coating, and removing surface is the important procedure ensureing coating and substrate combinating strength, and solvent or the clean-out system such as greasy dirt are removed, can with polishing or blast cleaning to rusty scale.
4, laser melting coating processing
1) selection of powdered alloy and the adjustment of automatic powder feeding device
According to the working position of collars, select the bonding phase of aforementioned proportion, spherical cast tungsten carbide powder, regulate automatic powder feeding device powder feeding rate, to meet powder feeding rate needed for coat-thickness.
2) laser cladding technological parameter
Condensing lens f=400
Cladding power P=4000W
Spot diameter D=4mm
Cladding scan velocity V=500mm/min
Overlapping rate 50%
Embodiment 2
It is as follows that laser melting coating tungsten carbide hard alloy coating manufactures high-speed wire rolling ring technique:
1. the matrix of collars
The body material of collars is 35CrMo steel alloy
2. the preparation of carboloy laser cladding of material
A, nickel-base alloy are the chemical composition of bonding phase, are calculated in mass percent:
Carbon 0.15%, silicon 3.5%, boron 2.5%, chromium 5%, iron 5%, all the other are nickel;
B, wolfram varbide feature
Spherical cast tungsten carbide, granularity 40-70um.
C, powder proportions
Spherical cast tungsten carbide weight hundred number is 60%; Nickel-base alloy is bonding phase weight hundred number is 40%.
Prepare on electronic balance by above-mentioned materials and ratio range, and carry out mixing more than 4 hours at special meal mixer.
3, working lining mechanical workout and removing surface
The object of mechanical workout is in order to the working lining thickness needed for reserved laser melting coating, and removing surface is the important procedure ensureing coating and substrate combinating strength, and solvent or the clean-out system such as greasy dirt are removed, can with polishing or blast cleaning to rusty scale.
4, laser melting coating processing
1) selection of powdered alloy and the adjustment of automatic powder feeding device
According to the working position of collars, select the bonding phase of aforementioned proportion, spherical cast tungsten carbide powder, regulate automatic powder feeding device powder feeding rate, to meet powder feeding rate needed for coat-thickness.
2) laser cladding technological parameter
Cladding power P=7000W
Rectangular light spot length × wide=10mm × 1mm
Cladding scan velocity V=400mm/min
Overlapping rate 40%.
Claims (1)
1. prepare a method for tungsten carbide hard alloy coating on high-speed wire rolling ring surface, it is characterized in that technological process is as follows:
(1) matrix of collars
The body material of collars is 40CrNiMo steel alloy;
(2) preparation of carboloy laser cladding of material
A, nickel-base alloy are the chemical composition of bonding phase, are calculated in mass percent:
Carbon 0.08%, silicon 2.5%, boron 1.5%, chromium 3%, iron 3%, all the other are nickel,
B, wolfram varbide feature
Spherical cast tungsten carbide, granularity 40-70um,
C, powder proportions
Spherical cast tungsten carbide weight hundred number is 80%; Nickel-base alloy is bonding phase weight hundred number is 20%.
Prepare on electronic balance by above-mentioned materials and ratio range, and carry out mixing more than 4 hours at special meal mixer;
(3) working lining mechanical workout and removing surface
The object of mechanical workout is in order to the working lining thickness needed for reserved laser melting coating, and removing surface is the important procedure ensureing coating and substrate combinating strength, and greasy dirt solvent or clean-out system are removed, can with polishing or blast cleaning to rusty scale;
(4) laser melting coating processing
1) selection of powdered alloy and the adjustment of automatic powder feeding device
According to the working position of collars, select the bonding phase of aforementioned proportion, spherical cast tungsten carbide powder, regulate automatic powder feeding device powder feeding rate, to meet powder feeding rate needed for coat-thickness;
2) laser cladding technological parameter
Condensing lens f=400
Cladding power P=4000W
Spot diameter D=4mm
Cladding scan velocity V=500mm/min
Overlapping rate 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010518946.9A CN102453902B (en) | 2010-10-26 | 2010-10-26 | Method for preparing tungsten carbide hard alloy coating on surface of high-speed wire roller collar |
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| CN201010518946.9A CN102453902B (en) | 2010-10-26 | 2010-10-26 | Method for preparing tungsten carbide hard alloy coating on surface of high-speed wire roller collar |
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| CN102453902A CN102453902A (en) | 2012-05-16 |
| CN102453902B true CN102453902B (en) | 2015-02-18 |
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| CN115161514A (en) * | 2022-04-29 | 2022-10-11 | 四川轻化工大学 | High-temperature wear-resistant composite metallurgy strengthening alloy cladding layer for strengthening roll surface or roll pass and laser cladding process |
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| CN101338428A (en) * | 2008-08-07 | 2009-01-07 | 沈阳大陆激光成套设备有限公司 | Strengthen process for pick head by laser fusing and coating wear-resistant coating |
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Application publication date: 20120516 Assignee: SHENYANG DALU LASER FLEXIBLE MANUFACTURE TECHNOLOGY Co.,Ltd. Assignor: Shenyang Dalu Laser Complete Equipment Co.,Ltd. Contract record no.: X2023210000143 Denomination of invention: Method for preparing tungsten carbide hard alloy coating on the surface of high-speed wire rod roller ring Granted publication date: 20150218 License type: Common License Record date: 20230927 |