CN107838628A - A kind of grain roll roll surface combined-repair method - Google Patents
A kind of grain roll roll surface combined-repair method Download PDFInfo
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- CN107838628A CN107838628A CN201711001136.4A CN201711001136A CN107838628A CN 107838628 A CN107838628 A CN 107838628A CN 201711001136 A CN201711001136 A CN 201711001136A CN 107838628 A CN107838628 A CN 107838628A
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- roll
- roll surface
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- repaired
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laser Beam Processing (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
A kind of grain roll roll surface combined-repair method, it is mainly treated repaired roller roll surface and detected a flaw and pre-treatment；Submerged arc overlay welding is carried out to roll surface, slow cooling is incubated after the completion of built-up welding, replica is machined out to roll surface after built-up welding, add roller diameter to be worked into smaller 0.5mm than green diameter；Laser Alloying Treatment is carried out to roll surface using high power semiconductor lasers, alloy-layer is controlled in 0.5mm 1mm；It it is 300 DEG C by roller temperature control, insulation naturally cools to room temperature after 34 hours after laser alloying terminates；Replica is machined out to the roll after processing and detected.The present invention can both repair larger surface damage, and it is big to solve cast iron materials fragility again, the performance issue such as thermal fatigue resistance impact difference, substantially prolongs the service life of grain roll, reduces enterprise's production cost.
Description
Technical field
The invention belongs to machining technology field, more particularly to a kind of restorative procedure of roll surface.
Background technology
Roll is the instrument for making metal produce plastic deformation, is the important consumption portion for determining rolling mill efficiency and mill bar quality
Part.Roll is the strength member on steel rolling mill's rolling mill, rolls stone roller steel using pressure caused by a pair or one group of roll rolling
Material.It is primarily subjected to Dynamic And Static Loads during rolling, abrasion and the influence of temperature change.Roll species is a lot, conventional roll product
Kind has cast steel roll, grain roll and forging roller three major types.Grain roll has good wearability, but fragility is big, and heat resistanceheat resistant is tired
Labor impact is poor, is generally used for plate, line, pipe and light-section mill finishing stand.The condition of work of roll is complex, and roll exists
Residual stress and thermal stress can be produced in preparatory process before manufacture and use.The various cycles are further received during use should
The effect of power, include bending, torsion, shearing, contact stress and thermal stress etc..These stress are unevenly distributed along the body of roll
, it is continually changing, its reason does not only have design factor, also roll wear in use, the continuous change of temperature and roller shape.
In addition, abnormal conditions often occur in rolling condition.It is improper that roll cools down after use, infringement that also can be thermally stressed.Institute
With roll in addition to abrasion, the various local damages and surface damage such as also frequent cracked, fracture, peeling, impression.
Damage for the roll surface of grain roll, repaired at present frequently with the mode of common built-up welding, but its technique is present
Many drawbacks, as built-up welding face of weld temperature is higher, the heated wind for producing fire check, larger repairing failure being present of roller-way can be made
Danger, and weld interpass temperature is also controlled in welding process, cause the surface abrasion resistance after Bead weld repair and corrosion resistance all
Beat less than preferable effect.Such as Chinese patent CN03116017.4, " large-scale roller hard-face overlaying welding restorative procedure ", it is applied to casting
It is long that soaking time is there is during iron roll repair welding, low production efficiency, the problems such as repairing effect is not good enough.Therefore, rolled in face of cast iron
The present situation of roller high-volume wear out failure, the production of right reduction enterprise and rehabilitation cost, develop a kind of more effective cast iron
Roll repair welding method is extremely necessary.
The content of the invention
It is an object of the invention to solve the problems, such as that prior art is present, there is provided one kind, which can effectively extend grain roll, to be made
With the life-span, improve roll surface performance grain roll roll surface combined-repair method,.
The present invention is achieved by the following technical solutions：
(1) roll surface is detected a flaw, removes the iron rust of roll surface to be repaired, fatigue layer with polished silicon wafer or grinding wheel, beat
Grind metallic luster；
(2) part to be repaired is heated with oxy arc, makes roll surface temperature up to 190 DEG C -200 DEG C, and suitably expanded and add
Heat rating is influenceed with reducing thermal stress；
(3) if roll surface to be repaired has slight roll surface to come off, selectWear-resisting welding rod special for special reparation；If repair roll surface
There is serious roll surface to come off, then selectStructural steel electrode reparation；Using it is preceding by the welding rod in 300 DEG C of baking boxes
Insulation 2 hours, 100 DEG C of constant temperature storages after drying；
(4) submerged arc bead welding, electric current are carried out to roll surface to be repaired：100-120A, direct-current polarity just connect, speed of welding
140-180mm/min, welding position and periphery are tapped to reduce stress at once after welding, room is cooled to after the completion of built-up welding
Temperature；
(5) replica is machined out to roll surface after built-up welding, roller diameter be worked into smaller 0.5mm than green diameter；
(6) to machining back roller mirror polish, and cleaned with acetone, will prepare to add on roll clamping to laser alloying lathe
Work；
(7) alloying material uses ceramal powder, and the mass percent of ceramal powdered ingredients is TiC:WC:
NiCrC:Fe60=20:10:10:60, powder size 200-400nm are small with powder mixing machine device mixing 2-3 by alloy powder
When, it is standby to be cooled to room temperature after Tumbleing Dry.
(8) laser alloying processing, laser output power 2800-3500W, 2 × 14mm of rectangular light spot, scanning are carried out
Speed is 1200-1500mm/min, and overlapping rate 45%-50%, single track alloying thickness is 0.5-1mm, is protected in process
Roller temperature is held as 400-500 DEG C, using inert gas shielding, the inert gas is argon gas；
(9) after laser alloying terminates, it is 300 DEG C by roller temperature control, room temperature is naturally cooled to after being incubated 3-4 hours
.
(10) preliminary examination is carried out to the roll after processing, machining replica is carried out after not damaging, reach size and essence
After degree requires, then detected a flaw and mapping surface properties.
The present invention has the following advantages that compared with prior art：
1st, submerged arc overlay welding and laser alloying dual process are employed, larger surface damage can have both been repaired, can solve again
Certainly cast iron materials fragility is big, the performance issue such as thermal fatigue resistance impact difference.
2nd, the service life of grain roll is substantially prolongs, reduces enterprise's production cost.
3rd, the average hardness of the roll surface overlaying surface after repairing improves significantly to HRC60 or so, the average hardness of substrate surface
HRC62 or so is brought up to, case hardness is evenly distributed and requires about 10 hardness numbers beyond original technology, hence it is evident that improves roll
Surface quality.
Embodiment
Embodiment 1
Grain roll roll surface has crackle, without compared with macrolesion.First, roll surface is detected a flaw, is removed and treated with grinding wheel
Iron rust, the fatigue layer of roll surface are repaired, polish metallic luster.Part to be repaired is heated with oxy arc, is heated to roll surface
Temperature suitably expands heated perimeter to reduce thermal stress influence up to 190 DEG C.FromWear-resisting welding rod special for special, at 300 DEG C
Baking box inside holding 2 hours, 100 DEG C of constant temperature storages, then carry out submerged arc bead welding with the welding rod to roll surface to be repaired after drying,
Electric current：100A, direct-current polarity just connect, speed of welding 180mm/min, after welding at once welding position and periphery are tapped with
Stress is reduced, room temperature is cooled to after the completion of built-up welding after the completion of built-up welding.Replica is machined out to roll surface after built-up welding, adds roller diameter
It is worked into smaller 0.5mm than green diameter.To machining back roller mirror polish, and cleaned with acetone, by roll clamping to laser alloy
Change and laser alloying processing is carried out on lathe.Alloying material uses ceramal powder, the quality of ceramal powdered ingredients
Percentage is TiC:WC:NiCrC:Fe60=20:10:10:60, alloy powder is mixed 2 hours with powder mixing machine device, with drying
It is standby that room temperature is cooled to after machine drying, powder size 200nm.Laser-alloying Technolgy parameter：Laser output power is
2800W, 2 × 14mm of rectangular light spot, sweep speed 1500mm/min, overlapping rate 45%, single track alloying thickness are
0.5mm, it is 400 DEG C that roller temperature is kept in process, and using inert gas shielding, the inert gas is argon gas.Laser
It it is 300 DEG C by roller temperature control, insulation naturally cools to room temperature after 3 hours after alloying terminates.To rolling after processing
Roller carries out preliminary examination, carries out machining replica after not damaging, and after reaching size and required precision, then is detected a flaw and surface
Performance detection.
Embodiment 2
Grain roll roll surface has crackle and small hole.First, roll surface is detected a flaw, removed with grinding wheel to be repaired
The iron rust of multiple roll surface, fatigue layer, polish metallic luster.Part to be repaired is heated with oxy arc, is heated to roll surface temperature
Degree suitably expands heated perimeter to reduce thermal stress influence up to 200 DEG C.Built-up welding is ready for, is selectedWear-resisting special weldering
Bar, in 300 DEG C of baking box inside holdings 2 hours, 100 DEG C of constant temperature storages, were then carried out with the welding rod to roll surface to be repaired after drying
Submerged arc bead welding, electric current：110A, direct-current polarity just connect, speed of welding 150mm/min, at once to welding position and week after welding
While being tapped to reduce stress, room temperature is cooled to after the completion of built-up welding after the completion of built-up welding.Roll surface after built-up welding is machined out multiple
Type, roller diameter is added to be worked into smaller 0.5mm than green diameter.To machining back roller mirror polish, and cleaned with acetone, roll is filled
Clip to progress laser alloying processing on laser alloying lathe.Alloying material uses ceramal powder, ceramal powder
The mass percent of last composition is TiC:WC:NiCrC:Fe60=20:10:10:60, alloy powder is mixed with powder mixing machine device
2 hours, it was standby to be cooled to room temperature after Tumbleing Dry, powder size 300nm.Laser-alloying Technolgy parameter：Laser
Power output is 3200W, 2 × 14mm of rectangular light spot, sweep speed 1300mm/min, overlapping rate 47%, single track alloying
Thickness is 0.8mm, and it is 450 DEG C that roller temperature is kept in process, and using inert gas shielding, the inert gas is argon
Gas.It it is 300 DEG C by roller temperature control, insulation is cooled to room temperature after 3 hours after laser alloying terminates.After processing
Roll carry out preliminary examination, carry out machining replica after not damaging, after reaching size and required precision, then carry out flaw detection and
Mapping surface properties.
Embodiment 3
Grain roll roll surface has obvious crackle and relatively large defect.First, roll surface is detected a flaw, it is clear with grinding wheel
Except the iron rust of roll surface to be repaired, fatigue layer, polish metallic luster.Part to be repaired is heated with oxy arc, is heated to
Roll surface temperature suitably expands heated perimeter to reduce thermal stress influence up to 200 DEG C.Built-up welding is ready for, is selectedStructure
Steel electrode, in 300 DEG C of baking box inside holdings 2 hours, 100 DEG C of constant temperature storages after drying, then with the welding rod to roll surface to be repaired
Carry out submerged arc bead welding, electric current：120A, direct-current polarity just connect, speed of welding 140mm/min, at once to welding position after welding
And periphery is tapped to reduce stress, and room temperature is cooled to after the completion of built-up welding after the completion of built-up welding.Machine is carried out to roll surface after built-up welding to add
Work replica, roller diameter is added to be worked into smaller 0.5mm than green diameter.To machining back roller mirror polish, and cleaned, will rolled with acetone
Roller clamping uses ceramal powder to progress laser alloying processing on laser alloying lathe, alloying material, and ceramics close
The mass percent of golden powdered ingredients is TiC:WC:NiCrC:Fe60=20:10:10:60, by alloy powder powder mixing machine device
Mixing 3 hours, it is standby to be cooled to room temperature after Tumbleing Dry, powder size 400nm.Laser-alloying Technolgy parameter：Swash
Light device power output is 3500W, 2 × 14mm of rectangular light spot, sweep speed 1200mm/min, overlapping rate 50%, and single track closes
Aurification thickness is 1mm, and it is 500 DEG C that roller temperature is kept in process, and using inert gas shielding, the inert gas is argon
Gas.It it is 300 DEG C or so by roller temperature control, insulation naturally cools to room temperature after 4 hours after laser alloying terminates.
Preliminary examination is carried out to the roll after processing, machining replica is carried out after not damaging, after reaching size and required precision, then is entered
Row flaw detection and mapping surface properties.
Claims (7)
- A kind of 1. grain roll roll surface combined-repair method, it is characterised in that：It comprises the following steps：(1) pre-treatment is repaired：Roll surface is detected a flaw, the iron rust, tired of roll surface to be repaired is removed with polished silicon wafer or grinding wheel Labor layer, polish metallic luster；(2) roll the pre-heat treatment：Part to be repaired is heated with oxy arc, makes roll surface temperature up to 190 DEG C -200 DEG C, and It is appropriate to expand heated perimeter to reduce thermal stress influence；(3) submerged arc bead welding, electric current are carried out to roll surface to be repaired：90-120A, direct-current polarity just connect, speed of welding 140- 220mm/min, welding position and periphery are tapped to reduce stress at once after welding, slow cooling is incubated after the completion of built-up welding；(4) replica is machined out to roll surface after built-up welding；(5) to machining back roller mirror polish, and cleaned with acetone, will prepare to process on roll clamping to laser alloying lathe；(6) alloying material uses ceramal powder, and the mass percent of ceramal powdered ingredients is TiC:WC:NiCrC: Fe60=20:10:10:60, ceramal powder is mixed 2 hours with powder mixing machine device, room is cooled to after Tumbleing Dry Warm standby is used；(7) laser-alloying Technolgy parameter：Laser output power is 2800-3500W, 2 × 14mm of rectangular light spot, sweep speed For 1000-1500mm/min, overlapping rate 45%-50%, single track alloying thickness is 0.5-1mm, keeps rolling in process Roll temperature is 400-500 DEG C, and using inert gas shielding, the inert gas is argon gas；(7) after laser alloying terminates, isothermal holding is carried out to roll；(8) roll after cooling treatment is detected and machined.
- 2. grain roll roll surface combined-repair method according to claim 1, it is characterised in that：The roll material is casting Iron.
- 3. grain roll roll surface combined-repair method according to claim 1, it is characterised in that：It is described to roll surface after built-up welding Carry out turnery processing replica, be roller diameter is worked into it is smaller 0.5mm than green diameter.
- 4. grain roll roll surface combined-repair method according to claim 1, it is characterised in that：Damaged according to roll surface to be repaired Condition of the injury condition is different, if roll surface to be repaired has slight roll surface to come off during built-up welding, selectsWear-resisting welding rod special for special reparation；If repair Multiple roll surface has serious roll surface to come off, then selectsStructural steel electrode reparation.
- 5. grain roll roll surface combined-repair method according to claim 1, it is characterised in that：The ceramal powder Granularity be 200-400nm.
- 6. grain roll roll surface combined-repair method according to claim 1, it is characterised in that：It is described that roll is protected Temperature processing, temperature control be 300 DEG C or so, be incubated 3-4 hours after naturally cool to room temperature.
- 7. grain roll roll surface combined-repair method according to claim 1, it is characterised in that：The detection and machining It is that presentation quality, alloy-layer size, case hardness and nondestructive inspection detection are carried out to the roll after cooling, is then made according to roll With requiring to be machined and replica.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711001136.4A CN107838628A (en) | 2017-10-24 | 2017-10-24 | A kind of grain roll roll surface combined-repair method |
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| CN201711001136.4A CN107838628A (en) | 2017-10-24 | 2017-10-24 | A kind of grain roll roll surface combined-repair method |
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| CN107838628A true CN107838628A (en) | 2018-03-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468633A (en) * | 2018-12-03 | 2019-03-15 | 苏常美 | The method that a kind of pair of roll is repaired |
| CN109570695A (en) * | 2018-12-04 | 2019-04-05 | 四川川润液压润滑设备有限公司 | Process method for H3Cr13 surfacing on surface of 45 steel |
| CN111230400A (en) * | 2020-01-15 | 2020-06-05 | 上海岳乾激光科技有限公司 | Repairing, reinforcing and remanufacturing method for steel breakout and breakout parts of cold-work die |
| CN111378897A (en) * | 2020-04-20 | 2020-07-07 | 燕山大学 | Roll surface repairing material of wrapper roll and laser cladding remanufacturing method of wrapper roll |
| CN113263053A (en) * | 2020-02-16 | 2021-08-17 | 晟通科技集团有限公司 | Repairing method for plate roller of foil rolling mill |
| CN113478168A (en) * | 2021-08-09 | 2021-10-08 | 泰尔(安徽)工业科技服务有限公司 | Method for repairing mandrel for rolling seamless steel tube |
| CN114669840A (en) * | 2022-05-09 | 2022-06-28 | 苏州威奥得焊材科技有限公司 | Method for repairing nodular cast iron roller |
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| JPH0740216A (en) * | 1993-08-03 | 1995-02-10 | Mitsubishi Heavy Ind Ltd | Bead surface repairing device |
| CN101358344A (en) * | 2008-09-01 | 2009-02-04 | 南京钢铁股份有限公司 | Repair method of backup roll surface of steckel mill and special repair powder used thereon |
| CN105441934A (en) * | 2014-08-12 | 2016-03-30 | 宝山钢铁股份有限公司 | Method for welding wearing-resistant layer by laser cladding on roller way roll surface |
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| JPH0740216A (en) * | 1993-08-03 | 1995-02-10 | Mitsubishi Heavy Ind Ltd | Bead surface repairing device |
| CN101358344A (en) * | 2008-09-01 | 2009-02-04 | 南京钢铁股份有限公司 | Repair method of backup roll surface of steckel mill and special repair powder used thereon |
| CN105441934A (en) * | 2014-08-12 | 2016-03-30 | 宝山钢铁股份有限公司 | Method for welding wearing-resistant layer by laser cladding on roller way roll surface |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468633A (en) * | 2018-12-03 | 2019-03-15 | 苏常美 | The method that a kind of pair of roll is repaired |
| CN109570695A (en) * | 2018-12-04 | 2019-04-05 | 四川川润液压润滑设备有限公司 | Process method for H3Cr13 surfacing on surface of 45 steel |
| CN111230400A (en) * | 2020-01-15 | 2020-06-05 | 上海岳乾激光科技有限公司 | Repairing, reinforcing and remanufacturing method for steel breakout and breakout parts of cold-work die |
| CN113263053A (en) * | 2020-02-16 | 2021-08-17 | 晟通科技集团有限公司 | Repairing method for plate roller of foil rolling mill |
| CN111378897A (en) * | 2020-04-20 | 2020-07-07 | 燕山大学 | Roll surface repairing material of wrapper roll and laser cladding remanufacturing method of wrapper roll |
| CN113478168A (en) * | 2021-08-09 | 2021-10-08 | 泰尔(安徽)工业科技服务有限公司 | Method for repairing mandrel for rolling seamless steel tube |
| CN114669840A (en) * | 2022-05-09 | 2022-06-28 | 苏州威奥得焊材科技有限公司 | Method for repairing nodular cast iron roller |
| CN114669840B (en) * | 2022-05-09 | 2023-11-17 | 苏州威奥得焊材科技有限公司 | Method for repairing ductile cast iron roller |
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Application publication date: 20180327 |