CN102677049A - Laser restoring process for surface of high carbon alloy roller - Google Patents
Laser restoring process for surface of high carbon alloy roller Download PDFInfo
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- CN102677049A CN102677049A CN2012101663436A CN201210166343A CN102677049A CN 102677049 A CN102677049 A CN 102677049A CN 2012101663436 A CN2012101663436 A CN 2012101663436A CN 201210166343 A CN201210166343 A CN 201210166343A CN 102677049 A CN102677049 A CN 102677049A
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Abstract
The invention relates to a laser restoring process for the surface of a high carbon alloy roller. The laser restoring process comprises the following steps: (A) processing the surface of the roller, and carrying out failure analysis on the roller; (B) optimizing process parameters according to failure analysis results of the roller, and carrying out laser cladding; adopting a preset powder-feeding mode to enable a fast-transverse-flow carbon dioxide laser serving as a light source to carry out continuous screwfeed lap joint scanning on the roller; and enabling adopted alloy powder to comprise, by weight, no more than 0.15% of C, 12.5%-14.5% of Cr, 1.3%-1.8% of B, 0.5%-1.5% of Si, 0.5%-1.5% of Mo, and the balance Fe; and (C) performing detection. The laser restoring process for the surface of the high carbon alloy roller carries out laser cladding on the surface of the roller to enable the dimensions of the roller to meet the using requirements, a roller base body and a cladding layer are combined tightly, the thickness and the hardness of the cladding layer are uniform, and abrasion resistance of the roller can be enhanced.
Description
Technical field
The present invention relates to a kind of laser cladding method, especially a kind of laser melting coating restorative procedure of roller surface.
Background technology
Since the nineties in 20th century, the steel industry of China develops rapidly, and 2006 produce 4.23 hundred million tons of steel per year, and China's output of steels in 1/3rd, 2010 that account for world's output of steel further promote, and reach 6.27 hundred million tons, record high.For realizing the rolling demand of high-grade steel product, the development of domestic high-end roll and development process are accelerated, and the roll that substitutes import was in a large number succeeded in developing and substituting import one in the short period of time, have greatly satisfied the demand of domestic Iron And Steel Industry development.Roll is the main consumable part of steel rolling equipment as the important tool of steel rolling industry, and along with the increase of steel output, the roll consumption amount increases sharply.Rough calculation, if press loss per ton steel roll 1kg estimation, only roll consumption in 2010 is just about about 600,000 tons.The form of roll loss failure mainly is wearing and tearing and the fatigability inefficacy because of producing under the long-term high pressure, like the variation of reduction, crackle, distortion and the size of hardness etc.Roll material in the past like 60CrMo, 9Cr2Mo, 86CrMoV7 etc., normally directly more renews roll or adopts technique for overlaying such as argon arc welding, union-melt weld to carry out the reparation of small area.And present roll all adopts new roll material such as MC3 is serial, MC5 is serial; Because the adjustment of this type of steel on chemical ingredients; Its overall mechanical properties, heat treatment performance all improve a lot, and complied with the demand in market, but weldableness have substantial degradation.Adopt common overlaying method defectives such as crackle, pore, hardness deficiency will very easily occur, the roll reparation of this material type is got into a difficult position.
Laser melting coating is meant that placing selecteed coated material on by the cladding matrix surface with different adding material modes makes it to melt simultaneously with the matrix surface skim through laser irradiation; And it is extremely low to form extent of dilution behind the rapid solidification; Become the top coat of metallurgical binding with matrix; Significantly improve the process method of wear-resisting, anti-corrosion, heat-resisting, the anti-oxidant and electrical specification of substrate surface, thereby reach the purpose of surface-treated or reparation.With built-up welding, spraying, plating and gas phase sediment-filled phase ratio, laser melting coating has that extent of dilution is little, dense structure, coating and characteristics such as matrix bond is good, be fit to that cladding material is many, granularity and content are big.How with the laser melting and coating technique effective application in the roller surface reparation, be the problem that those skilled in the art need solve.
Summary of the invention
The technical problem that the present invention will solve provides a kind of breaker roll surface and carries out laser melting coating, makes its size reach the laser repairing process of the high carbon alloy roller surface of request for utilization.
In order to solve the problems of the technologies described above, the invention provides a kind of laser repairing process of high carbon alloy roller surface, may further comprise the steps:
A. handle on the breaker roll surface, and breaker roll carries out failure analysis;
B. according to the failure analysis result of roll, optimize processing parameter, carry out laser melting coating;
The mode of powder feeding is preset in employing, carries out the scanning of continuous helical feeding overlap joint with the fast-transverse-flow CO for the light source breaker roll; Laser power is 1700W to 2100W, and absolute altitude is 260mm to 275mm, and spot size is 10mm * 1.8mm, and sweep velocity is 120mm/min to 150mm/min, and amount of lap is 3mm, and powder sending quantity is 6g/min to 12g/min; The component of the powdered alloy that is adopted and weight percent content are C≤0.15%, Cr:12.5% to 14.5%, and B:1.3% to 1.8%, Si:0.5% to 1.5%, Mo:0.5% to 1.5%, all the other are Fe;
C. detect.
In order to make the roller footpath of repairing high carbon alloy roll later can reach requirement, a kind of optimized technical scheme is: the cladding layer thickness of above-mentioned laser melting coating is 1mm to 3mm.
In order to make high carbon alloy roll to be repaired in the process of laser melting coating, repair successfully, and obtain better repairing effect, a kind of optimized technical scheme is: above-mentioned steps A removes the dust on the roll, greasy dirt, corrosion; Detect the size at each position of roll, confirm failure site and abrasion loss thereof; Breaker roll carries out radially, the face runout check, confirms the roll deformation amount; Remove the fatigue layer 0.5mm to 2mm of roll failure site, and clean.
For the quality of the high carbon alloy roll after guaranteeing to repair, a kind of optimized technical scheme is: above-mentioned steps C detects roller surface hardness; Detect the roll deformation amount; Mechanical workout is carried out on the breaker roll surface; Detect a flaw, verification.
Technique scheme of the present invention is compared prior art and had the following advantages: the powdered alloy that adopts in the laser repairing process of high carbon alloy roller surface of the present invention utilizes Cr, Mo element that ferrous alloy is carried out the element reinforcement; To make alloy be main matrix solidifying that the back forms with the austenite through adding an amount of B, Si; To satisfy its hardness requirement; And have good wettability and self-fluxing nature simultaneously, can prevent in cladding process, to crack.This process using broad band laser bundle, efficient is higher.This process using presets the mode of powder feeding, and strict control powder sending quantity, and laser power, sweep velocity, amount of lap etc. are optimized makes that the homogeneity of structure of cladding layer is good, thickness and even hardness.This technology makes that the fusion rate of cladding layer and the matrix of roll failure site is high, it is tight to combine, and the roll deformation amount is little, and roller surface does not have crackle and pore, and hardness reaches more than the 55HRC, has excellent abrasion resistance.
Embodiment
The concrete steps of the laser repairing process of the high carbon alloy roller surface of present embodiment are following:
A. roller surface to be repaired is handled, breaker roll carries out failure analysis.
With removings such as the dust on the roll, greasy dirt, corrosions; Detect the size at each position of roll, confirm failure site and abrasion loss thereof; Breaker roll carries out radially, the face runout check, and whether the check roll has metamorphism; Remove the fatigue layer 0.5mm of roll failure site through polishing, and clean.
B. according to the failure analysis result of roll, optimize processing parameter, carry out laser melting coating.
The mode of powder feeding is preset in employing, carries out the scanning of continuous helical feeding overlap joint with the fast-transverse-flow CO for the light source breaker roll.Laser power is 2000W, and absolute altitude (being that laser apparatus leaves the distance between the Substrate, absolute altitude=focal length+defocusing amount) is 265mm, and spot size is 10mm * 1.8mm, and sweep velocity is 130 mm/min, and amount of lap is 3mm, and powder sending quantity is 8g/min.The component of the powdered alloy that is adopted and weight percent content are C:0.15%, Cr:13.5%, and B:1.5%, Si:1%, Mo:1%, all the other are Fe.Cladding layer thickness is 1mm.
C. after repairing end, detect.
Detect surface hardness; Detect deflection; Mechanical workout is carried out on the breaker roll surface that requires according to drawing; Whether detect a flaw, detecting has pore, slag inclusion, slight crack etc. to influence roll machinery performance defect; Carry out verification, whether quality inspection is qualified.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (4)
1. the laser repairing process of a high carbon alloy roller surface is characterized in that, may further comprise the steps:
A. handle on the breaker roll surface, and breaker roll carries out failure analysis;
B. according to the failure analysis result of roll, optimize processing parameter, carry out laser melting coating;
The mode of powder feeding is preset in employing, carries out the scanning of continuous helical feeding overlap joint with the fast-transverse-flow CO for the light source breaker roll; Laser power is 1700W to 2100W, and absolute altitude is 260mm to 275mm, and spot size is 10mm * 1.8mm, and sweep velocity is 120mm/min to 150mm/min, and amount of lap is 3mm, and powder sending quantity is 6g/min to 12g/min; The component of the powdered alloy that is adopted and weight percent content are C≤0.15%, Cr:12.5% to 14.5%, and B:1.3% to 1.8%, Si:0.5% to 1.5%, Mo:0.5% to 1.5%, all the other are Fe;
C. detect.
2. according to the laser repairing process of the described high carbon alloy roller surface of claim 1, it is characterized in that: the cladding layer thickness of said laser melting coating is 1mm to 3mm.
3. according to the laser repairing process of the described high carbon alloy roller surface of claim 1, it is characterized in that: said steps A is that the dust on the roll, greasy dirt, corrosion are removed; Detect the size at each position of roll, confirm failure site and abrasion loss thereof; Breaker roll carries out radially, the face runout check, confirms the roll deformation amount; Remove the fatigue layer 0.5mm to 2mm of roll failure site, and clean.
4. according to the laser repairing process of the described high carbon alloy roller surface of claim 1, it is characterized in that: said step C detects roller surface hardness; Detect the roll deformation amount; Mechanical workout is carried out on the breaker roll surface; Detect a flaw, verification.
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| CN2012101663436A CN102677049A (en) | 2012-05-27 | 2012-05-27 | Laser restoring process for surface of high carbon alloy roller |
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| CN2012101663436A CN102677049A (en) | 2012-05-27 | 2012-05-27 | Laser restoring process for surface of high carbon alloy roller |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668175A (en) * | 2012-09-20 | 2014-03-26 | 丹阳宏图激光科技有限公司 | Laser cladding repair process of thin-walled sleeve favorable for reducing build-up welding stress and deformation |
| CN104385636A (en) * | 2014-09-28 | 2015-03-04 | 无锡市东北塘永丰橡塑厂 | Rubber hammer treatment process |
| CN106435565A (en) * | 2016-07-08 | 2017-02-22 | 浙江工业大学 | Iron-based alloy powder for laser refabrication of rotor journal, and refabrication method thereof |
| CN106555183A (en) * | 2015-09-24 | 2017-04-05 | 沈阳大陆激光技术有限公司 | A kind of laser repair method of centering roller-way |
| CN106567069A (en) * | 2015-10-13 | 2017-04-19 | 丹阳宏图激光科技有限公司 | Laser repairing method of hot roll good in laser cladding effect |
| CN106567070A (en) * | 2015-10-13 | 2017-04-19 | 丹阳宏图激光科技有限公司 | A hot roller laser restoration method allowing a restored surface to have good wear resistance |
| CN106567071A (en) * | 2015-10-13 | 2017-04-19 | 丹阳宏图激光科技有限公司 | Low roller deformation hot roller laser repair method |
| CN106676513A (en) * | 2015-08-24 | 2017-05-17 | 丹阳宏图激光科技有限公司 | Laser repair method of hot rolling roller |
| CN109468633A (en) * | 2018-12-03 | 2019-03-15 | 苏常美 | The method that a kind of pair of roll is repaired |
| CN111996525A (en) * | 2020-07-08 | 2020-11-27 | 北京航空航天大学 | Laser surface strengthening method for improving surface quality and performance of high-carbon steel member |
| CN112589105A (en) * | 2020-12-08 | 2021-04-02 | 首钢集团有限公司 | Repairing method of cold-rolled supporting roller |
| CN113913808A (en) * | 2020-07-10 | 2022-01-11 | 丹阳宏图激光科技有限公司 | Laser repairing method for marine diesel engine crankshaft |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668175B (en) * | 2012-09-20 | 2016-01-20 | 丹阳宏图激光科技有限公司 | Be beneficial to the laser cladding repair technique of the thin-wall sleeve reducing built-up welding static stress and distortion |
| CN103668175A (en) * | 2012-09-20 | 2014-03-26 | 丹阳宏图激光科技有限公司 | Laser cladding repair process of thin-walled sleeve favorable for reducing build-up welding stress and deformation |
| CN104385636A (en) * | 2014-09-28 | 2015-03-04 | 无锡市东北塘永丰橡塑厂 | Rubber hammer treatment process |
| CN106676513A (en) * | 2015-08-24 | 2017-05-17 | 丹阳宏图激光科技有限公司 | Laser repair method of hot rolling roller |
| CN106555183A (en) * | 2015-09-24 | 2017-04-05 | 沈阳大陆激光技术有限公司 | A kind of laser repair method of centering roller-way |
| CN106567069A (en) * | 2015-10-13 | 2017-04-19 | 丹阳宏图激光科技有限公司 | Laser repairing method of hot roll good in laser cladding effect |
| CN106567070A (en) * | 2015-10-13 | 2017-04-19 | 丹阳宏图激光科技有限公司 | A hot roller laser restoration method allowing a restored surface to have good wear resistance |
| CN106567071A (en) * | 2015-10-13 | 2017-04-19 | 丹阳宏图激光科技有限公司 | Low roller deformation hot roller laser repair method |
| CN106435565A (en) * | 2016-07-08 | 2017-02-22 | 浙江工业大学 | Iron-based alloy powder for laser refabrication of rotor journal, and refabrication method thereof |
| CN109468633A (en) * | 2018-12-03 | 2019-03-15 | 苏常美 | The method that a kind of pair of roll is repaired |
| CN111996525A (en) * | 2020-07-08 | 2020-11-27 | 北京航空航天大学 | Laser surface strengthening method for improving surface quality and performance of high-carbon steel member |
| CN113913808A (en) * | 2020-07-10 | 2022-01-11 | 丹阳宏图激光科技有限公司 | Laser repairing method for marine diesel engine crankshaft |
| CN112589105A (en) * | 2020-12-08 | 2021-04-02 | 首钢集团有限公司 | Repairing method of cold-rolled supporting roller |
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Application publication date: 20120919 |