CN104084750B - Submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller - Google Patents
Submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller Download PDFInfo
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- CN104084750B CN104084750B CN201410326108.XA CN201410326108A CN104084750B CN 104084750 B CN104084750 B CN 104084750B CN 201410326108 A CN201410326108 A CN 201410326108A CN 104084750 B CN104084750 B CN 104084750B
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- compression roller
- roll surface
- arc welding
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- alkaline
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
Abstract
A submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller, belongs to compression roller reparation and manufactures field again.Its method step is: cleaning workpiece, remove roll surface fatigue layer, detect and repair spot size, determine damage location and wear extent thereof: material analysis and hardness determination are carried out to compression roller mother metal, utilize metallographic to detect and failure analysis and life appraisal are carried out to workpiece: select the relevant parameter of welding wire and submerged arc welding machine then to weld alkaline compression roller roll surface according to testing result: to carry out machining as requested: surface colour flaw detection and integral ultrasonic flaw detection are carried out to the workpiece after processing, and the roughness of roll surface is detected.It is good that this method has wearability, hardness, intensity are high and in use can not produce block, the phenomenon such as come off.
Description
Technical field
The compression roller submerged-arc welding reparation that the present invention relates to mechanical prosthesis field manufactures field again, particularly relates to the submerged arc welding restorative procedure after the wearing and tearing of a kind of alkaline compression roller.
Background technology
Because alkaline compression roller bears the effect of larger alternate load in operation process, occurring to be easy to when extruding wear and tear with workpiece, even there is crackle.Cold roll both domestic and external mostly to adopt carbon and alloying element content higher as material monolithic manufactures such as 9Cr2Mo, 85CrMoV, 86CrMoV7,9Cr3Mo, then reached the hardness requirement of 62 ~ 64HRC by heat treatment such as surface hardenings, manufacturing cost is high.Owing to repairing with manufacture difficulty is comparatively large again after inefficacy, generally all do and scrap process, serious waste of resources.If repair difficulty very greatly to it, and be difficult to meet instructions for use, the great tackling key problem difficult problem that the so far exploitation of high hardness material has just become metallurgy industry urgently to be resolved hurrily.So select submerged-arc welding to repair compression roller and coordinate corresponding repair materials and Technology for Heating Processing again, be a significant job.
Summary of the invention
The object of the invention is to the compression roller after for the wearing and tearing of existing conventional process generally all do and scrap process, the drawback of serious waste of resources, provide that a kind of wearability is good, repair layer crackle is few, cladding layer and the high alkaline compression roller of mother metal fusion rate wear and tear after submerged arc welding restorative procedure.
The technical scheme realizing the employing of foregoing invention object is:
A submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller, its submerged arc welding restorative procedure step is:
The first step prepares before repairing
A. cleaning workpiece, detect each portion size, determine damage location and wear extent thereof;
B. failure analysis and metallographic detection are carried out to workpiece;
C. compression roller roll surface damage location fatigue layer is removed 2-4mm, fatigue layer is cleaned out, there is new machined surface.
D. hardness and the chemical composition of press roll surface is detected;
E. carry out preheating to press roll surface, preheat temperature is 350-400 DEG C
Second step repair process
F. select welding wire according to the Step d of the first step, described compression roller is repaired welding wire and is divided into two kinds, and the first is prime coat welding wire, and the second is overlay cladding welding wire; Prime coat welding wire chemical composition contains according to weight percent meter: w (C) 0.12%, w (Si) 0.42%, w (Mn) 1.84%, w (Cr) 13.0%, w (Ni) 1.51%, V, Ti, Mo element≤2%;
The chemical composition of overlay cladding welding wire contains according to weight percent meter: w (C) 0.65%, w (Si) 0.62%, w (Mn) 1.78%, w (Cr) 6%, V, Ti, Cu, Mo element≤5%;
G. the data of submerged arc welding machine are regulated, by weld polarity DC reverse connection, welding current 400-450A, weldingvoltage 30-32V, linear velocity 800mm/min, overlapping rate 40-50%;
Heat treatment after 3rd step reparation
H. compression roller has welded and has carried out tempering heat treatment to compression roller afterwards, and its method is: 20-50 DEG C/h heats up, insulation 6-8h when temperature rises to 550-600 DEG C, and then with stove cooling, temperature is come out of the stove after reaching 150 DEG C air cooling;
Detection after 4th step reparation
I. according to designing requirement, machining is carried out to reparation position;
J. dye penetrant inspection and ultrasonic examination are carried out to reparation surface;
K. hardness determination is carried out to the roll surface after reparation.
Preferably, the method for operating of described cleaning workpiece is: clear up, till dust, greasy dirt, corrosion expose clean surface after removing the dust of press roll surface, greasy dirt, corrosion with cleaning device.
Preferably, compression roller roll surface damage location fatigue layer is removed 3mm, fatigue layer is cleaned out, occurs that new machined surface is operating surface.
Adopt technique scheme, compared with prior art, this method, by the analysis on technical to compression roller material, determines the arrangement and method for construction that submerged-arc welding is repaired, and propose concrete renovation technique, utilize submerged arc welding technology to complete the reparation of this workpiece smoothly.Have that wearability is good, intensity is high, cladding layer and mother metal Percentage bound high, not easily fall block, come off, the roll surface hardness after welding is higher than the 5-10HRC of mother metal own, and dense structure, crystal grain is tiny has good wearability and fatigue crack-resistant.
Detailed description of the invention
Below in conjunction with example, the present invention will be further described
Present embodiment discloses the submerged arc welding restorative procedure after the alkaline compression roller wearing and tearing of a kind of chemical plant, the compression roller material that the method relates to is 85CrMoV, and hardness is 52-54HRC.Concrete restorative procedure step is:
The first step. prepare before repairing
1. first to clean roll surface before reparation, dry: detect each spot size, determine damage location and wear extent thereof;
2. pair workpiece carries out failure analysis and life appraisal, and carries out metallographic detection
3. according to repair content repair text specified restoration technique, man-hour; Compression roller roll surface damage location fatigue layer is removed 2-3mm, fatigue layer is cleaned up, there is new machined surface, convenient operation.
4. detect material and the hardness of mother metal, the compression roller material that the present embodiment relates to is 85CrMoV, and the hardness on surface is 52-54HRC.
5. pair press roll surface carries out preheating, is preheating to 350-400 DEG C
Second step repair process
1. select suitable welding wire according to the material and hardness that detect mother metal, this compression roller is repaired welding wire and is divided into two classes, ground floor is that the chemical composition of bottoming welding wire contains by weight percentage: w (C) 0.12%, w (Si) 0.42%, w (Mn) 1.84%, w (Cr) 13.0%, w (Ni) 1.51%, V, Ti, Mo element≤2%, all the other are iron.
The second layer is overlay cladding welding wire, and its chemical composition contains by weight percentage: w (C) 0.65%, w (Si) 0.62%, w (Mn) 1.78%, w (Cr) 6%, V, Ti, Cu, Mo element≤5%, all the other are iron.
2. regulate the data of submerged arc welding machine, weld polarity DC reverse connection, welding current 400-450A, weldingvoltage 30-32V, linear velocity 800mm/min, the overlapping rate 40-50% between welding bead.
Heat treatment after 3rd step reparation
Compression roller has welded heat-treats afterwards to compression roller, tempering process is: 20-50 DEG C/h heats up, temperature rises to 550-600 DEG C of insulation 6-8h, then with stove cooling, air cooling compression roller of coming out of the stove after 150 DEG C has welded heat-treats afterwards to compression roller, and tempering process is: 20-50 DEG C/h heats up, when temperature rises to 550-600 DEG C, insulation 6-8h, then with stove cooling, temperature is come out of the stove after being down to 150 DEG C air cooling.
Detection after 4th step reparation
1., after compression roller is repaired, according to drawing, as requested machining is carried out to reparation position.
2. dye penetrant inspection and ultrasonic examination are carried out in pair reparation surface processed.3. the roll surface after pair reparation carries out hardness determination, and whether detecting press roll surface has zero defect, and carries out hardness determination and Metallographic Analysis to roll surface, check its repairing quality qualified.
Above-described embodiment only have expressed one embodiment of the present invention, but therefore can not be interpreted as limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (3)
1. the submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller, its submerged-arc welding restorative procedure step is:
The first step prepares before repairing
A. cleaning workpiece, detect each portion size, determine damage location and wear extent thereof;
B. failure analysis and metallographic detection are carried out to workpiece;
C. compression roller roll surface damage location fatigue layer is removed 2-4mm, fatigue layer is cleaned out, there is new machined surface;
D. hardness and the chemical composition of press roll surface is detected;
E. carry out preheating to press roll surface, preheat temperature is 350-400 DEG C;
Second step repair process
F. select welding wire according to the Step d of the first step, welding wire is divided into two kinds, and the first is prime coat welding wire, and the second is overlay cladding welding wire; Prime coat welding wire chemical composition contains according to weight percent meter: w (C) 0.12%, w (Si) 0.42%, w (Mn) 1.84%, w (Cr) 13.0%, w (Ni) 1.51%, w (V) or w (Ti) or (Mo)≤2%;
The chemical composition of overlay cladding welding wire contains according to weight percent meter: w (C) 0.65%, w (Si) 0.62%, w (Mn) 1.78%, w (Cr) 6%, w (V) or w (Ti) or (Cu) or w (Mo)≤5%;
G. the data of submerged arc welding machine are regulated, by weld polarity DC reverse connection, welding current 400-450A, weldingvoltage 30-32V, linear velocity 800mm/min, overlapping rate 40-50%;
Heat treatment after 3rd step reparation
H. compression roller has welded and has carried out tempering heat treatment to compression roller afterwards, and its method is: 20-50 DEG C/h heats up, insulation 6-8h when temperature rises to 550-600 DEG C, and then with stove cooling, temperature is come out of the stove after reaching 150 DEG C air cooling;
Detection after 4th step reparation
I. according to designing requirement, machining is carried out to reparation position;
J. dye penetrant inspection and ultrasonic examination are carried out to reparation surface;
K. hardness determination is carried out to the roll surface after reparation.
2. the submerged arc welding restorative procedure after alkaline compression roller wearing and tearing according to claim 1, it is characterized in that, the method of operating of described cleaning workpiece is: clear up, till dust, greasy dirt, corrosion expose clean surface after removing the dust of press roll surface, greasy dirt, corrosion with cleaning device.
3. the submerged arc welding restorative procedure after alkaline compression roller wearing and tearing according to claim 1, is characterized in that, compression roller roll surface damage location fatigue layer is removed 3mm, fatigue layer is cleaned out, occur that new machined surface is operating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410326108.XA CN104084750B (en) | 2014-07-10 | 2014-07-10 | Submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller |
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| CN201410326108.XA CN104084750B (en) | 2014-07-10 | 2014-07-10 | Submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller |
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| CN104084750A CN104084750A (en) | 2014-10-08 |
| CN104084750B true CN104084750B (en) | 2016-04-27 |
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| CN105057846B (en) * | 2015-07-09 | 2018-03-02 | 苏州优霹耐磨复合材料有限公司 | Grinding roll overlaying technique |
| CN105436664B (en) * | 2015-10-27 | 2017-11-28 | 深圳市瑞凌实业股份有限公司 | Two built-up welding autocontrol methods after large-scale roll shaft abrasion |
| CN105382378B (en) * | 2015-10-27 | 2018-05-25 | 江苏锦航机械制造有限公司 | Overlaying method after large-scale roll shaft abrasion |
| CN106238878A (en) * | 2016-08-17 | 2016-12-21 | 安徽鼎恒再制造产业技术研究院有限公司 | A kind of shaft-like workpiece submerged welding process |
| CN109290747A (en) * | 2016-12-05 | 2019-02-01 | 安徽兴林机械集团有限公司 | A kind of process of surface treatment of grinding roll overlaying |
| CN106925940A (en) * | 2017-03-07 | 2017-07-07 | 黄石市宏佳模具有限公司 | A kind of welding and restoring process of extrusion die |
| CN107984060A (en) * | 2017-12-20 | 2018-05-04 | 江苏能建机电实业集团有限公司 | A kind of submerged arc bead welding technique |
| CN109226934B (en) * | 2018-10-31 | 2021-01-12 | 广西柳钢工程技术有限公司 | Build-up welding method for roller |
| CN111604785B (en) * | 2020-04-17 | 2022-05-27 | 唐山钢铁集团有限责任公司 | Method for processing local defects of hot-rolled supporting roller by surface wave detection method |
| CN113960162B (en) * | 2021-09-26 | 2024-01-09 | 南京钢铁股份有限公司 | Inspection method for laser cladding repair layer on roller surface |
| CN114888405B (en) * | 2022-03-31 | 2023-12-05 | 阳江核电有限公司 | Method for online eliminating defects of special-shaped welding joint of large heat-resistant steel in nuclear power station |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102744497A (en) * | 2012-07-19 | 2012-10-24 | 盐城市成功机械制造有限公司 | Repair method for press roll of roll press |
| CN103481010B (en) * | 2013-09-17 | 2016-01-13 | 柳州市三龙耐磨焊接科技有限公司 | A kind of full-automatic online cold welding pattching roll squeezer technique |
| CN103464929B (en) * | 2013-09-17 | 2016-03-02 | 柳州市三龙耐磨焊接科技有限公司 | Roller press squeeze roll roll surface manufactures and repairs special self-shield medicine core surfacing welding wire |
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Effective date of registration: 20161219 Address after: 064300 Hebei province Tangshan City Qianxi County town of West Henan North Zhai Xing Patentee after: Han Hongsheng Address before: 064300 Hebei province Tangshan City Qianxi County town of West Henan North Zhai Xing Patentee before: Hebei Ruizhao Laser Remanufacturing Technology Co., Ltd. |
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Effective date of registration: 20170831 Address after: 064300 Hebei province Tangshan City Qianxi County town of West Henan North Zhai Xing Patentee after: Hebei Ruizhao Laser Remanufacturing Technology Co., Ltd. Address before: 064300 Hebei province Tangshan City Qianxi County town of West Henan North Zhai Xing Patentee before: Han Hongsheng |
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Address after: 063000 Qianxi County Economic Development Zone, Tangshan City, Hebei Province Patentee after: Hebei RUIZHAO laser remanufacturing technology Limited by Share Ltd Address before: 064300 Hebei province Tangshan City Qianxi County town of West Henan North Zhai Xing Patentee before: Hebei Ruizhao Laser Remanufacturing Technology Co., Ltd. |
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