CN104084750A - Submerged-arc welding repair method after alkali production squeezing roller is worn - Google Patents
Submerged-arc welding repair method after alkali production squeezing roller is worn Download PDFInfo
- Publication number
- CN104084750A CN104084750A CN201410326108.XA CN201410326108A CN104084750A CN 104084750 A CN104084750 A CN 104084750A CN 201410326108 A CN201410326108 A CN 201410326108A CN 104084750 A CN104084750 A CN 104084750A
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- China
- Prior art keywords
- compression roller
- arc welding
- submerged
- welding wire
- roll surface
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a submerged-arc welding repair method after an alkali production squeezing roller is worn, and belongs to the field of squeezing roller repair and remanufacturing. The method includes the steps that a workpiece is cleaned, a fatigue layer on the roller surface is removed, the size of the repaired part is detected, and the damage part and the abrasion loss are determined; material analysis and hardness detection are conducted on the parent metal of the squeezing roller, and failure analysis and life evaluation are conducted on the workpiece through metallographic detection; relevant parameters of a welding wire and a submerged-arc welding machine are selected according to the detection result and then welding is conducted on the roller surface of the alkali production squeezing roller; mechanical machining is conducted according to requirements; surface colouration flaw detection and overall ultrasonic flaw detection are conducted on the machined workpiece, and roughness of the roller surface is detected. The method has the advantages of being good in wear resistance, high in hardness and strength, and the phenomena of chip off-falling and falling off cannot occur when the method is used.
Description
Technical field
Field is manufactured in the compression roller submerged-arc welding reparation that the present invention relates to mechanical prosthesis field again, particularly relates to the submerged arc welding restorative procedure after a kind of alkaline compression roller wearing and tearing.
Background technology
Because alkaline compression roller bears the effect of larger alternate load in operation process, in the time there is extruding with workpiece, be easy to wearing and tearing, even there is crackle.Cold roll both domestic and external mostly adopt carbon and alloying element content higher as material monolithic manufactures such as 9Cr2Mo, 85 CrMoV, 86CrMoV 7,9Cr3Mo, then the hardness requirement that reaches 62～64HRC by heat treatment means such as surface hardenings, manufacturing cost is high.After inefficacy, owing to repairing with manufacture difficulty is larger again, generally all do and scrap processing, serious waste of resources.If very large to its reparation difficulty, and be difficult to meet instructions for use, the so far exploitation of high hardness material has just become a metallurgy industry great tackling key problem difficult problem urgently to be resolved hurrily.So select submerged-arc welding to repair and coordinate again corresponding repair materials and Technology for Heating Processing compression roller, be a significant job.
Summary of the invention
The object of the invention is to generally all do and scrap processing for the compression roller after existing conventional process wearing and tearing, the drawback of serious waste of resources, provides that a kind of wearability is good, repair layer crackle is few, submerged arc welding restorative procedure after cladding layer and the high alkaline compression roller wearing and tearing of mother metal fusion rate.
The technical scheme that realizes 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 is prepared before repairing
A. cleaning workpiece, detect each portion size, determine damage location and wear extent thereof;
B. workpiece is carried out to failure analysis and metallographic detection;
C. compression roller roll surface damage location fatigue layer is removed to 2-4mm, fatigue layer is cleaned out, to there is new machined surface.
D. detect hardness and the chemical composition of press roll surface;
E. press roll surface is carried out to preheating, preheat temperature is 350-400 DEG C
Second step repair process
F. select welding wire according to the d step 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%, (M is 1.84% w (Cr) 13.0% n) for w (Si) 0.42% w, w (N i) 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%, and w (Si) 0.62%, (M is 1.78 % n), w (Cr) 6% V, Ti, Cu, Mo, V element≤5% for w;
G. regulate the data of submerged arc welding machine, by weld polarity DC reverse connection, welding current 400-450A, weldingvoltage 30-32V, linear velocity 800mm/min, overlapping rate 40-50%;
Heat treatment after the 3rd step is repaired
H. compression roller has welded and rear compression roller has been carried out to tempering heat treatment, and its method is: 20-50 DEG C/h heats up, and temperature rise is incubated 6-8h during to 550-600 DEG C, then cooling with stove, the temperature air cooling of coming out of the stove after reaching 150 DEG C;
Detection after the 4th step is repaired
I. carry out machining to repairing position according to designing requirement;
J. carry out dye penetrant inspection and ultrasonic examination to repairing surface;
K. the roll surface after repairing is carried out to hardness detection.
As preferred version, the method for operating of described cleaning workpiece is: the dust with cleaning device to press roll surface, greasy dirt, corrosion are cleared up, till dust, greasy dirt, corrosion are exposed clean surface after removing.
As preferred version, compression roller roll surface damage location fatigue layer is removed to 3mm, fatigue layer is cleaned out, occur 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, has been determined the arrangement and method for construction that submerged-arc welding is repaired, and concrete renovation technique has been proposed, utilize submerged arc welding technology to complete smoothly the reparation of this workpiece.Have that wearability is good, intensity is high, cladding layer is combined rate with mother metal high, is difficult for falling piece, comes off, the roll surface hardness after welding is higher than the 5-10HRC of mother metal own, 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
The present embodiment discloses the submerged arc welding restorative procedure after the alkaline compression roller wearing and tearing of a kind of chemical plant, and the compression roller material that the method relates to is 85CrMoV, and hardness is 52-54HRC.Concrete restorative procedure step is:
The first step. before repairing, prepare
1. before reparation, first to clean roll surface, 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 to 2-3mm, fatigue layer is cleaned up, to there is new machined surface, convenient operation.
4. the material and the hardness that detect mother metal, the compression roller material that the present embodiment relates to is 85CrMoV, the hardness on surface is 52-54HRC.
5. pair press roll surface is carried out preheating, is preheating to 350-400 DEG C
Second step repair process
1. select suitable welding wire according to the material and the 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 (M n) 1.84%, w (Cr) 13.0%, w (N i) 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%, (M is 1.78 % n) for w, w (Cr) 6%, V, Ti, Cu, Mo, V 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 the 3rd step is repaired
Compression roller has welded heat-treats afterwards to compression roller, tempering process is: 20-50 DEG C/h heats up, temperature rise is to 550-600 DEG C of insulation 6-8h, then cooling with stove, the 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 rise is arrived 550-600 DEG C, insulation 6-8h, then cooling with stove, the temperature air cooling of coming out of the stove after being down to 150 DEG C.
Detection after the 4th step is repaired
1., after compression roller is repaired, carry out as requested machining according to drawing to repairing position.
2. dye penetrant inspection and ultrasonic examination are carried out in pair reparation surface processing.3. the roll surface after pair reparation carries out hardness detection, and whether detecting press roll surface has zero defect, and roll surface is carried out to hardness detection and Metallographic Analysis, check its repairing quality qualified.
Above-described embodiment has only been expressed one embodiment of the present invention, but can not therefore 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 is prepared before repairing
A. cleaning workpiece, detect each portion size, determine damage location and wear extent thereof;
B. workpiece is carried out to failure analysis and metallographic detection;
C. compression roller roll surface damage location fatigue layer is removed to 2-4mm, fatigue layer is cleaned out, to there is new machined surface.
D. detect hardness and the chemical composition of press roll surface;
E. press roll surface is carried out to preheating, preheat temperature is 350-400 DEG C
Second step repair process
F. select welding wire according to the d step 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 (M n) 1.84%, w (Cr) 13.0%, w (N i) 1.51%, element≤2% such as V, Ti, Mo;
The chemical composition of overlay cladding welding wire contains according to weight percent meter: w (C) 0.65%, and w (Si) 0.62%, (M is 1.78 % n), w (Cr) 6%, V, Ti, Cu, Mo, V element≤5% for w;
G. regulate the data of submerged arc welding machine, by weld polarity DC reverse connection, welding current 400-450A, weldingvoltage 30-32V, linear velocity 800mm/min, overlapping rate 40-50%;
Heat treatment after the 3rd step is repaired
H. compression roller has welded and rear compression roller has been carried out to tempering heat treatment, and its method is: 20-50 DEG C/h heats up, and temperature rise is incubated 6-8h during to 550-600 DEG C, then cooling with stove, the temperature air cooling of coming out of the stove after reaching 150 DEG C;
Detection after the 4th step is repaired
I. carry out machining to repairing position according to designing requirement;
J. carry out dye penetrant inspection and ultrasonic examination to repairing surface;
K. the roll surface after repairing is carried out to hardness detection.
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: the dust with cleaning device to press roll surface, greasy dirt, corrosion are cleared up, till dust, greasy dirt, corrosion are exposed clean surface after removing.
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 to 3mm, and fatigue layer is cleaned out, and occurs that new machined surface is operating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN104084750A (en) | 2014-10-08 |
| CN104084750B CN104084750B (en) | 2016-04-27 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551441A (en) * | 2014-11-27 | 2015-04-29 | 宝山钢铁股份有限公司 | Ultrahigh-strength gas protection welding wire containing V and manufacturing method thereof |
| CN105057846A (en) * | 2015-07-09 | 2015-11-18 | 苏州优霹耐磨复合材料有限公司 | Grinding roll built-up welding technology |
| CN105382378A (en) * | 2015-10-27 | 2016-03-09 | 张荣斌 | Surfacing welding method for abraded large roll shaft |
| CN105436664A (en) * | 2015-10-27 | 2016-03-30 | 张荣斌 | Automatic double-overlaying control method for abraded large roller shaft |
| 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 |
| CN106670739A (en) * | 2016-12-05 | 2017-05-17 | 安徽兴林机械集团有限公司 | Surface treatment technology for grinding roller surfacing |
| 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 |
| CN109226934A (en) * | 2018-10-31 | 2019-01-18 | 广西柳钢工程技术有限公司 | The overlaying method of roll |
| CN111604785A (en) * | 2020-04-17 | 2020-09-01 | 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 |
| CN113960162A (en) * | 2021-09-26 | 2022-01-21 | 南京钢铁股份有限公司 | Method for inspecting laser cladding repair layer on surface of roller |
| CN114888405A (en) * | 2022-03-31 | 2022-08-12 | 阳江核电有限公司 | Method for eliminating defects of large heat-resistant steel special-shaped welded joint of nuclear power station on line |
| CN115647534A (en) * | 2022-11-01 | 2023-01-31 | 北京北方车辆集团有限公司 | Special vehicle creeper tread forging die repairing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103464929A (en) * | 2013-09-17 | 2013-12-25 | 柳州市三龙耐磨焊接科技有限公司 | Dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing roll surface of squeeze roller of roller press |
| CN103481010A (en) * | 2013-09-17 | 2014-01-01 | 柳州市三龙耐磨焊接科技有限公司 | Novel full-automatic online cold welding repairing process for roll squeezers |
-
2014
- 2014-07-10 CN CN201410326108.XA patent/CN104084750B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103464929A (en) * | 2013-09-17 | 2013-12-25 | 柳州市三龙耐磨焊接科技有限公司 | Dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing roll surface of squeeze roller of roller press |
| CN103481010A (en) * | 2013-09-17 | 2014-01-01 | 柳州市三龙耐磨焊接科技有限公司 | Novel full-automatic online cold welding repairing process for roll squeezers |
Non-Patent Citations (2)
| Title |
|---|
| 王欣等: "辊压机辊面的堆焊、维护与保养", 《新世纪水泥导报》 * |
| 赵云峰: "堆焊药芯焊丝在辊压机维修保养中的应用", 《现代制造工程》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551441A (en) * | 2014-11-27 | 2015-04-29 | 宝山钢铁股份有限公司 | Ultrahigh-strength gas protection welding wire containing V and manufacturing method thereof |
| CN105057846A (en) * | 2015-07-09 | 2015-11-18 | 苏州优霹耐磨复合材料有限公司 | Grinding roll built-up welding technology |
| CN105382378A (en) * | 2015-10-27 | 2016-03-09 | 张荣斌 | Surfacing welding method for abraded large roll shaft |
| CN105436664A (en) * | 2015-10-27 | 2016-03-30 | 张荣斌 | Automatic double-overlaying control method for abraded large roller shaft |
| 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 |
| CN106670739B (en) * | 2016-12-05 | 2019-02-12 | 安徽兴林机械集团有限公司 | A kind of process of surface treatment of grinding roll overlaying |
| CN106670739A (en) * | 2016-12-05 | 2017-05-17 | 安徽兴林机械集团有限公司 | Surface treatment technology for grinding roller surfacing |
| 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 |
| CN109226934A (en) * | 2018-10-31 | 2019-01-18 | 广西柳钢工程技术有限公司 | The overlaying method of roll |
| CN111604785A (en) * | 2020-04-17 | 2020-09-01 | 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 |
| 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 |
| CN113960162A (en) * | 2021-09-26 | 2022-01-21 | 南京钢铁股份有限公司 | Method for inspecting laser cladding repair layer on surface of roller |
| 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 |
| CN114888405A (en) * | 2022-03-31 | 2022-08-12 | 阳江核电有限公司 | Method for eliminating defects of large heat-resistant steel special-shaped welded joint of nuclear power station on line |
| 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 |
| CN115647534A (en) * | 2022-11-01 | 2023-01-31 | 北京北方车辆集团有限公司 | Special vehicle creeper tread forging die repairing method |
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