CN104294268A - Preparation method of wear-resistant guide roller - Google Patents
Preparation method of wear-resistant guide roller Download PDFInfo
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- CN104294268A CN104294268A CN201410454291.1A CN201410454291A CN104294268A CN 104294268 A CN104294268 A CN 104294268A CN 201410454291 A CN201410454291 A CN 201410454291A CN 104294268 A CN104294268 A CN 104294268A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a preparation method of a wear-resistant guide roller, and belongs to the technical field of wear resistant materials. A guide roller body is manufactured firstly by using a precise casting method, wherein the guide roller body comprises the chemical composition by the mass percentage: 0.30-0.45% of C, 15.0-18.0% of Cr, 8.0-10.0% of Mn, 0.30-0.42% of N, 4.0-5.5% of Ni, 0.2-0.6% of Si, 0.06-0.10% of Nb, less than 0.03% of S, less than 0.04% of P, and the balance Fe and inevitable impurities. The guide roller body is subjected to rough processing, and then the working surface is coated with a high-hardness wear-resistant fusion-covering layer with the thickness of 1.8-2.5 mm, and thus the service life of the guide roller is greatly improved.
Description
Technical field
The invention discloses a kind of preparation method of deflector roll, particularly the wear-resisting deflector roll preparation method of one, belongs to high-abrasive material technical field.
Background technology
The sixties in 20th century First brand new the root 45 ° of high speed wire rod finishing blocks that rub come out after, cause the revolutionary variation in wire production field.Constantly improved through nearly more than 40 years and update, rod rolling speed breaches the limit in the past, rises to the surprising high speed of 120 ~ 150m/s.Along with the raising of mill milling speed, sliding guide device is scrolled guide and guard (deflector roll) gradually and replaces.Deflector roll is the main consumable tool on high-speed rod-rolling mill, domestic Year's consumption more than 5,000,000, the deflector roll Year's consumption of world market 800 ~ 1,000 ten thousand.In deflector roll work except the rubbing effect of bearing wire rod, also by the impact of wire rod and the heating of high temperature wire rod and the Quench of water coolant, deflector roll requires high rigidity, high tenacity, high thermal fatigue resistance and anti-stick rigidity.But the deflector roll that current China manufactures is lower for work-ing life, affects the raising of Rolling production efficiency and conforming product rate.In order to improve deflector roll performance, Chinese invention patent CN 103882424 discloses a kind of preparation method of the high-speed rod-rolling mill guide roll with laser cladding coating, it is characterized in that the method comprises the following steps: the matrix of a. guide roll selects bearing steel, medium carbon steel or low alloy steel material, by deflector roll final dimension, adopt lathe to carry out roughing, each machined surface reserves the allowance for finish of 0.2-0.5mm; B. the cladding surplus that turning goes out 0.5-1.5mm is carried out to face of the rolling groove location of laser melting coating, and clean is carried out to cladding face; C. configure wear-resisting cladding material, select the Ni-based of chrome carbide strongthener or cobalt-based laser cladding powder; D. adopt high power CO 2 or YAG or semi-conductor or optical fiber laser to carry out laser melting coating scanning rolling the direct powder feeding of face groove surfaces, YAG laser laser power is 300W ~ 500W, CO
2, semi-conductor and optical fiber laser be 2000W ~ 4000W, sweep velocity is at 1mm/s-15mm/s, and coat-thickness will stay the process redundancy of 0.3mm ~ 0.5mm; E. precision work is carried out to the rotary roll after laser melting coating, reach dimensional precision and surface smoothness requirements.Chinese invention patent CN 101695713A also discloses WC composite guide roller and manufacture method thereof, and composite guide roller has composite layer on the surface of steel matrix, it is characterized in that steel matrix to be carbon content be by weight percentage carbon steel or the steel alloy of 0.2 ~ 0.7%; Composite layer material composition is by weight percentage: WC is 10 ~ 50%, C is 0.2 ~ 0.8%, Cr is 0 ~ 3.0%, Mo is 0 ~ 2.0%, Mn is 0 ~ 2.0%, RE is 0.11-0.5%, other metal and non-metallic element total amount are no more than 5%, and surplus is Fe.Composite material powder is coated on steel matrix surface with the coating method of plasma spraying, and adopts argon arc remelting method to make its remelting together with steel matrix, form composite layer on steel matrix surface; Or directly composite material powder is sprayed on steel matrix surface, and argon arc remelting method is adopted to make its remelting together with steel matrix.This invention composite guide roller hardness is high, wear resistance good, fragility is low, can thermal treatment, can mechanical workout, cost is low, cost performance is high.Chinese invention patent CN 1931462 also discloses SiC composite guide roller and manufacture method thereof, it is characterized in that there is composite layer on the surface of steel matrix, the material composition of composite layer is: SiC5 ~ 40%, C0.2 ~ 0.6%, Cr0 ~ 3.0%, Mo0 ~ 2.0%, Mn0 ~ 2.0%, other metal and non-metallic element total amount are no more than 5%, and surplus is Fe.Composite material powder or wire rod or bar are coated on steel matrix surface with the coating method of thermospray, hot spray-welding or laser cladding, formed and combine between matrix material and described steel matrix.It is high that this invention composite guide roller possesses hardness, and wear resistance is good, and fragility is lower, can thermal treatment, can mechanical workout, and cost is low, and cost performance height waits premium properties.Chinese invention patent CN1990906 also discloses deflector roll and loop-rising roll energetic ion in a kind of bar and wire mill and injects wolfram varbide (WC) gradient material manufacturing technology; this invention by being suitably filled with rare gas element in rough vacuum situation; and under anomalous glow discharge condition, form high energy tungsten ion and inert gas ion.First after deflector roll or loop-rising roll being carried out gas soft nitriding process, then at a certain temperature, by ion implantation for tungsten to deflector roll or loop-rising roll surface, then carbonizing treatment is carried out to tungsten; Or after first deflector roll or loop-rising roll being carried out gas soft nitriding process, then carry out the double ion high energy ion implantation of tungsten ion and carbon ion.This technology can form the carbon tungsten alloy layer of certain depth on the top layer of deflector roll or loop-rising roll, improve the hardness of metallic surface, improve the wear resistance on deflector roll or loop-rising roll surface, high thermal resistance and self lubricity.With the product that this invention manufactures, there is high temperature resistant, high rigidity, high strength, high abrasion, the advantage such as corrosion-resistant, and considerably improve the work-ing life of deflector roll or loop-rising roll.Chinese patent 201120010122.0 also discloses a kind of composite wear-resistant steel rolling guide roller, and comprise deflector roll matrix and be coated on the abrasion resistant coatings on described deflector roll matrix surface, coat-thickness is 0.1mm ~ 2mm; The through hole coaxial with deflector roll matrix is had in the middle of deflector roll matrix.The material of abrasion resistant coatings is the one in high alloy material or cermet material.The material of deflector roll matrix is the one in high mangaenese steel, soft steel, steel alloy, grey cast iron or spheroidal graphite cast iron.This utility model is particularly useful for the rolling guide of steel rolling continuous-rolling system, has the performances such as wear-resistant, high temperature resistant, the heat shock resistance that can improve deflector roll, extends the work-ing life of deflector roll and reduces the manufacture cost and other advantages of deflector roll.
Summary of the invention
The object of the invention is to overcome that prior art above-mentioned deflector roll ubiquity hardness is low, the deficiency such as wear no resistance, there is provided a kind of and pass through laser cladding method in low-alloy guide roller surface, coating one deck hardness is high, high temperature abrasion resistance good, the alloy material of anti-chilling and shock heating excellent performance, thus realizes increasing substantially of deflector roll wear resistance.
The object of the invention can be realized by following processing step:
1. casting method is first adopted to manufacture deflector roll body, the chemical constitution of deflector roll body and mass percent thereof are: 0.30 ~ 0.45C, 15.0 ~ 18.0Cr, 8.0 ~ 10.0Mn, 0.30 ~ 0.42N, 4.0 ~ 5.5Ni, 0.2 ~ 0.6Si, 0.06 ~ 0.10Nb, S<0.03, P<0.04, surplus is Fe and inevitable impurity.Casting deflector roll body, after sand removal, polishing, is heated to 1030 ~ 1050 DEG C with stove, is incubated water-cooled, subsequently roughing after 1 ~ 2 hour;
2. ferrochrome powder is adopted, vanadium iron powder, titanium-iron powder, ferro-boron powder, molybdenum-iron powder, ferrotungsten powder and straight iron powder batching, above-mentioned powder 140 ~ 200 order, adopt the method for synchronous powder feeding system, wear-resisting cladding layer is prepared with the deflector roll body working-surface of laser apparatus after roughing, the chemical constitution of wear-resisting cladding layer and mass percent thereof are: 10.0 ~ 10.8Cr, 2.0 ~ 2.5V, 0.5 ~ 0.8Ti, 1.8 ~ 2.2B, 4.5 ~ 5.2Mo, 6.5 ~ 7.0W, 1.20 ~ 1.35C, <0.7Si, <0.02S, <0.03P, surplus is Fe and inevitable impurity.
Laser spot size is 5mm × 5mm; laser head and powder-supplying spray head are fixed in an industrial machine human arm; argon shield molten bath is passed into during cladding; thickness after wear-resisting cladding layer cladding is 1.8 ~ 2.5mm; finally be refined to dimensions and precision that deflector roll specifies; can obtain wear-resisting deflector roll, the wear-resisting cladding layer thickness of the wear-resisting deflector roll of finished product is 1.5 ~ 2.0mm.
Chemical constitution and the mass percent thereof of the wear-resisting deflector roll body of the present invention are: 0.30 ~ 0.45C, 15.0 ~ 18.0Cr, 8.0 ~ 10.0Mn, 0.30 ~ 0.42N, 4.0 ~ 5.5Ni, 0.2 ~ 0.6Si, 0.06 ~ 0.10Nb, S<0.03, P<0.04, surplus is Fe and inevitable impurity.Above-mentioned bulk material, after 1030 ~ 1050 DEG C of quenchings, can obtain that intensity is high, toughness and the good austenitic matrix tissue of solidity to corrosion, can guarantee reusing of deflector roll body.
On deflector roll body after roughing, adopt the method for synchronous powder feeding system, prepare wear-resistant coating with laser apparatus cladding, there is fine microstructures, densification, and cladding layer and deflector roll body present good metallurgical binding, guarantee not ftracture during deflector roll uses and peel off.The chemical constitution of cladding layer and mass percent thereof are: 10.0 ~ 10.8Cr, 2.0 ~ 2.5V, 0.5 ~ 0.8Ti, 1.8 ~ 2.2B, 4.5 ~ 5.2Mo, 6.5 ~ 7.0W, 1.20 ~ 1.35C, <0.7Si, <0.02S, <0.03P, surplus is Fe and inevitable impurity, can guarantee that cladding layer has high rigidity, excellent wear resistance and thermal fatigue resistance energy.
The present invention compared with prior art, has following characteristics:
1) the laser cladding layer hardness on deflector roll body of the present invention, more than 65HRC, has excellent wear resistance;
2) high, the toughness of deflector roll bulk strength of the present invention and solidity to corrosion good, can recycle;
3) the wear-resisting deflector roll of the present invention improves 3 ~ 4 times than high nickel chrome steel deflector roll work-ing life on high-speed rod-rolling mill.
Accompanying drawing explanation
The wear-resisting guide roller structure schematic diagram of Fig. 1;
The wear-resisting cladding layer of 1-, 2-deflector roll body.
Embodiment
Below in conjunction with embodiment, further statement is done to the present invention, but the present invention is not limited to following examples.Wear-resisting guide roller structure schematic diagram is as Fig. 1, and can be the structure that other improve, this be emphasis of the present invention yet.
Embodiment 1:
Deflector roll in high-speed rod rolling mill K5 frame, its step of preparation process is:
1. first adopt casting method to manufacture deflector roll body 2, the chemical constitution of deflector roll body 2 and mass percent thereof are: 0.32C, 15.07Cr, 9.85Mn, 0.31N, 5.48Ni, 0.27Si, 0.064Nb, 0.021S, 0.033P, and surplus is Fe and inevitable impurity.Casting deflector roll body 2, after sand removal, polishing, is heated to 1030 DEG C with stove, is incubated water-cooled, subsequently roughing after 2 hours.
2. 140 ~ 200 object ferrochrome powder, vanadium iron powder, titanium-iron powder, ferro-boron powder, molybdenum-iron powder, ferrotungsten powder and straight iron powder batching is adopted, adopt the method for synchronous powder feeding system, wear-resisting cladding layer 1 is prepared with deflector roll body 2 working-surface of 6kW optical fiber laser after roughing that wavelength is 1070nm, chemical constitution and the mass percent thereof of wear-resisting cladding layer 1 are: 10.04Cr, 2.47V, 0.52Ti, 2.19B, 4.51Mo, 6.94W, 1.23C, 0.38Si, 0.013S, 0.019P, surplus is Fe and inevitable impurity.Laser spot size is 5mm × 5mm; laser head and powder-supplying spray head are fixed in an ABB industrial machine human arm; argon shield molten bath is passed into during cladding; wear-resisting cladding layer 1 thickness is 1.90mm; finally be refined to dimensions and precision that deflector roll specifies; can obtain wear-resisting deflector roll, the wear-resisting deflector roll of finished product wear-resisting cladding layer 1 thickness is 1.55mm, wear-resisting cladding layer 1 hardness 65.6HRC.
Embodiment 2:
Deflector roll in high-speed rod rolling mill K8 frame, its step of preparation process is:
1. first adopt casting method to manufacture deflector roll body 2, the chemical constitution of deflector roll body 2 and mass percent thereof are: 0.44C, 17.73Cr, 8.06Mn, 0.42N, 4.08Ni, 0.55Si, 0.096Nb, 0.025S, 0.037P, and surplus is Fe and inevitable impurity.Casting deflector roll body 2, after sand removal, polishing, is heated to 1050 DEG C with stove, is incubated water-cooled, subsequently roughing after 1 hour.
2. 140 ~ 200 object ferrochrome powder, vanadium iron powder, titanium-iron powder, ferro-boron powder, molybdenum-iron powder, ferrotungsten powder and straight iron powder batching is adopted, adopt the method for synchronous powder feeding system, wear-resisting cladding layer 1 is prepared with deflector roll body 2 working-surface of 6kW optical fiber laser after roughing that wavelength is 1070nm, chemical constitution and the mass percent thereof of wear-resisting cladding layer 1 are: 10.74Cr, 2.02V, 0.78Ti, 1.81B, 5.17Mo, 6.54W, 1.32C, 0.40Si, 0.009S, 0.015P, surplus is Fe and inevitable impurity.Laser spot size is 5mm × 5mm; laser head and powder-supplying spray head are fixed in an ABB industrial machine human arm; argon shield molten bath is passed into during cladding; wear-resisting cladding layer 1 thickness is 2.4mm; finally be refined to dimensions and precision that deflector roll specifies; can obtain wear-resisting deflector roll, the wear-resisting deflector roll of finished product wear-resisting cladding layer 1 thickness is 1.96mm, wear-resisting cladding layer 1 hardness 66.1HRC.
Embodiment 3:
Deflector roll in high-speed rod rolling mill K7 frame, its step of preparation process is:
1. first adopt casting method to manufacture deflector roll body 2, the chemical constitution of deflector roll body 2 and mass percent thereof are: 0.39C, 16.70Cr, 8.97Mn, 0.37N, 4.83Ni, 0.21Si, 0.075Nb, 0.020S, 0.027P, and surplus is Fe and inevitable impurity.Casting deflector roll body 2, after sand removal, polishing, is heated to 1040 DEG C with stove, is incubated water-cooled, subsequently roughing after 1 hour.
2. 140 ~ 200 object ferrochrome powder, vanadium iron powder, titanium-iron powder, ferro-boron powder, molybdenum-iron powder, ferrotungsten powder and straight iron powder batching is adopted, adopt the method for synchronous powder feeding system, wear-resisting cladding layer 1 is prepared with deflector roll body 2 working-surface of 6kW optical fiber laser after roughing that wavelength is 1070nm, chemical constitution and the mass percent thereof of wear-resisting cladding layer 1 are: 10.41Cr, 2.36V, 0.67Ti, 1.98B, 4.72Mo, 6.90W, 1.26C, 0.46Si, 0.014S, 0.021P, surplus is Fe and inevitable impurity.Laser spot size is 5mm × 5mm; laser head and powder-supplying spray head are fixed in an ABB industrial machine human arm; argon shield molten bath is passed into during cladding; wear-resisting cladding layer 1 thickness is 2.1mm; finally be refined to dimensions and precision that deflector roll specifies; can obtain wear-resisting deflector roll, the wear-resisting deflector roll of finished product wear-resisting cladding layer 1 thickness is 1.78mm, wear-resisting cladding layer 1 hardness 65.8HRC.
Deflector roll of the present invention has carried out industrial application on high-speed rod-rolling mill, deflector roll bulk strength is high, toughness and solidity to corrosion good, can recycle, laser cladding layer hardness on deflector roll body is high, there is excellent wear resistance, work-ing life improves 3 ~ 4 times than high nickel chrome steel deflector roll, applies and has good economic and social benefit.
Claims (4)
1. a wear-resisting deflector roll preparation method, is characterized in that, comprise the following steps:
1. casting method is first adopted to manufacture deflector roll body, the chemical constitution of deflector roll body and mass percent thereof are: 0.30 ~ 0.45C, 15.0 ~ 18.0Cr, 8.0 ~ 10.0Mn, 0.30 ~ 0.42N, 4.0 ~ 5.5Ni, 0.2 ~ 0.6Si, 0.06 ~ 0.10Nb, S<0.03, P<0.04, surplus is Fe and inevitable impurity; Casting deflector roll body, after sand removal, polishing, is heated to 1030 ~ 1050 DEG C with stove, is incubated water-cooled, subsequently roughing after 1 ~ 2 hour;
2. ferrochrome powder is adopted, vanadium iron powder, titanium-iron powder, ferro-boron powder, molybdenum-iron powder, ferrotungsten powder and straight iron powder batching, above-mentioned powder 140 ~ 200 order, adopt the method for synchronous powder feeding system, wear-resisting cladding layer is prepared with the deflector roll body working-surface of laser apparatus after roughing, the chemical constitution of wear-resisting cladding layer and mass percent thereof are: 10.0 ~ 10.8Cr, 2.0 ~ 2.5V, 0.5 ~ 0.8Ti, 1.8 ~ 2.2B, 4.5 ~ 5.2Mo, 6.5 ~ 7.0W, 1.20 ~ 1.35C, <0.7Si, <0.02S, <0.03P, surplus is Fe and inevitable impurity.
2. according to the method for claim 1, it is characterized in that, during laser melting coating, laser spot size is 5mm × 5mm, and laser head and powder-supplying spray head are fixed in an industrial machine human arm, pass into argon shield molten bath during cladding.
3. according to the method for claim 1, it is characterized in that, the thickness after wear-resisting cladding layer cladding is 1.8 ~ 2.5mm, and be finally refined to dimensions and precision that deflector roll specifies, can obtain wear-resisting deflector roll, the wear-resisting cladding layer thickness of the wear-resisting deflector roll of finished product is 1.5 ~ 2.0mm.
4. according to the wear-resisting deflector roll that the either method of claim 1-3 prepares.
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Cited By (7)
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| CN108913975A (en) * | 2018-05-25 | 2018-11-30 | 金华华科激光科技有限公司 | A kind of method of the wear-resistant laser cladding powder and laser melting coating of 610HV or more |
| CN109440101A (en) * | 2018-10-30 | 2019-03-08 | 北京奥邦新材料有限公司 | A kind of composite ceramic powder for laser melting coating potassium steel material |
| CN109967535A (en) * | 2017-12-28 | 2019-07-05 | 西安威科多机电设备有限公司 | For rolling the loop back roll and its manufacturing method of height stick, wire rod facility |
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| CN109967535A (en) * | 2017-12-28 | 2019-07-05 | 西安威科多机电设备有限公司 | For rolling the loop back roll and its manufacturing method of height stick, wire rod facility |
| CN109967535B (en) * | 2017-12-28 | 2023-08-18 | 西安威科多机电设备有限公司 | Method for manufacturing looper roll for high speed rod and wire rolling equipment |
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