CN102010940A - Laser surface treatment method of pass roll - Google Patents
Laser surface treatment method of pass roll Download PDFInfo
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- CN102010940A CN102010940A CN 201010605259 CN201010605259A CN102010940A CN 102010940 A CN102010940 A CN 102010940A CN 201010605259 CN201010605259 CN 201010605259 CN 201010605259 A CN201010605259 A CN 201010605259A CN 102010940 A CN102010940 A CN 102010940A
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Abstract
The invention discloses a laser surface treatment method, in particular to a laser surface treatment method of a pass roll. By adopting the laser surface treatment method, uniform wear of the pass roll can be realized when in use. The laser surface treatment method comprises the following steps: A. measuring the wear degree of positions on the surface of the pass roll after use and when not in use; B. carrying out flaw detection on the pass roll; C. carrying out surface pretreatment on the pass roll which passes inspection; and D. carrying out laser surface treatment, wherein, the surface hardness of the positions on the surface of the pass roll after laser surface treatment increases with the increase of the wear degree. In the invention, laser strengthening treatment is carried out on the positions on the surface of the pass roll according to the wear degree of the positions on the surface of the pass roll in actual operation so as to realize uniform wear of the surface of the pass roll during the subsequent use process, thus reducing the pretreatment degree during the subsequent repair process, accelerating the repair speed and effectively prolonging the service life of the pass roll.
Description
Technical field
The present invention relates to a kind of Laser Surface Treatment method, especially a kind of concave roll Laser Surface Treatment method.
Background technology
In the operation of rolling, the body of roll of roll bears huge high speed alternation rolling pressure, and the pass serious wear especially directly contacts with red steel, causes to cold and heat succeed each other under the effect of cooling fluid, has aggravated the wearing and tearing of roll.No matter which kind of section roll all is that the contact site degree of wear is serious in the pass.Therefore, roll requires to have certain red hardness, wear resistant corrosion resistant and fatigue resistance.Multi-step process such as the production of roll need be made steel, forging and pressing, normalizing, the production cycle is long, the manufacturing cost costliness.The roll roll change also influences production efficiency, has increased production cost indirectly.Breaker roll carries out surface laser and strengthens, and can increase its hardness, wear-corrosion resistance.
Traditional Laser Surface Treatment is the mixed structure that forms layer of even martensite and residual austenite and carbide at roller surface, thereby the hardness, the anticorrosive wear-resistant that increase roller surface decrease performance, prolong its work-ing life.The use of roll is not disposable, and it promptly needs to repair after may wear to a certain degree and handles again, so that put into production once more, promptly same roll needs to repair repeatedly to utilize, and so just can reach maximum utilization ratio.Yet traditional laser processing method is the breaker roll surface all adopts identical or close processing intensity, handling intensity is power, the laser treatment speed of laser, this just makes roller surface be identical or close surface hardness and penetration of hardness, because roll is in the operation of rolling, each position unbalance stress of pass causes the roll wear degree to have very big difference.Through the roll after this laser treatment, though obtained certain prolongation its work-ing life, but still have the uneven phenomenon of wearing and tearing.Roll is after wearing and tearing are caused on the surface, need repair, promptly after handling the surface well, carry out Laser Surface Treatment again, yet there is the uneven phenomenon of wearing and tearing in traditional Laser Surface Treatment, make surface irregularity, breaker roll surface-treated difficulty that this just increases.
Summary of the invention
Technical problem to be solved by this invention provides a kind of concave roll uniform concave roll Laser Surface Treatment method of can wearing and tearing in use that makes.
The present invention solves the concave roll Laser Surface Treatment method that its technical problem adopts, and may further comprise the steps:
A, record the degree of wear that each position, concave roll surface is compared when not using after use;
B, concave roll is carried out flaw detection;
C, the concave roll that is up to the standards is carried out surface preparation;
D, carry out Laser Surface Treatment, the surface hardness at each position, Laser Surface Treatment concave roll surface increases with its degree of wear.
Further be that in the D step, the penetration of hardness at each position, concave roll surface increases with its degree of wear.
Further be that in the D step, the penetration of hardness at each position, concave roll surface is 1-1.5mm.
Further be that in the D step, what Laser Surface Treatment adopted is the laser melting processing mode.
Further be that in Laser Surface Treatment, laser power is 2100-2400W.
Further be that in Laser Surface Treatment, the overlap distance of adjacent spots is 0.5mm.
Further be that in Laser Surface Treatment, laser treatment speed is 800-1500mm/min.
Further be that in Laser Surface Treatment, the laser facula size is 4.5mm.
The invention has the beneficial effects as follows: come laser reinforcing to handle each position, concave roll surface according to the degree of wear of concave roll each position, surface in real work, can be so that wearing and tearing evenly in the use afterwards of concave roll surface, thereby in follow-up repair process, reduce the pre-treatment degree, both make reparation more quick, can effectively improve the work-ing life of concave roll again.
Description of drawings
Fig. 1 is the synoptic diagram of BD2 roll;
Fig. 2 is the synoptic diagram of BD1 roll;
Fig. 3 is 950 roll synoptic diagram;
Component among the figure, position and numbering: top roll first hole 1, top roll second hole 2, top roll the 3rd hole 3, top roll the 4th hole 4, top roll the 5th hole 5, the lower roll first hole 1a, the lower roll second hole 2a, lower roll the 3rd hole 3a, lower roll the 4th hole 4a, lower roll the 5th hole 5a, top roll one hole 6, lower roll one hole 6a, top roll two holes 7, lower roll two hole 7a, top roll three holes 8, lower roll three hole 8a, top roll four holes 9, lower roll four hole 9a, topping roll one hole 11, bottom roll one hole 12, topping roll two holes 21, bottom roll two holes 22, topping roll three holes 31, bottom roll three holes 32, topping roll four holes 41, bottom roll four holes 42, topping roll five holes 51, bottom roll five holes 52, topping roll six holes 61, bottom roll six holes 62.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
The present invention includes following steps: A, record the degree of wear that each position, concave roll surface is compared when not using after use; B, concave roll is carried out flaw detection; C, the concave roll that is up to the standards is carried out surface preparation; D, carry out Laser Surface Treatment, the surface hardness at each position, Laser Surface Treatment concave roll surface increases with its degree of wear.The frayed degree on concave roll surface is main relevant with stressing conditions aborning, the stressing conditions at certain position, concave roll surface is generally fixing, be that its degree of wear can not change usually, so in process of production, we just can count the degree of wear at each position, concave roll surface by rule of thumb data, also can calculate the degree of wear at each position, concave roll surface, promptly know the degree of wear at each position, concave roll surface thus by computer simulation.After the degree of wear that records each position, above-mentioned concave roll surface, can draw out the wear curve at each position, concave roll surface.At this moment, when processing or reparation concave roll, at first it is carried out flaw detection, to prevent defective concave roll; Then concave roll is carried out surface preparation, so that it reaches the requirement of Laser Surface Treatment; According to wear curve each position, concave roll surface is handled at last, laser treatment intensity is corresponding with frayed degree, that is to say the stronger laser treatment intensity of surperficial position employing that is subjected to big reactive force aborning, is worn easily, this just makes the hardness at this position improve, the penetration of hardness of intensive treatment improves, thereby more wear-resisting.Concave roll according to such laser treatment mode, in use from now on, the degree of wear at its each position, surface is roughly the same, just become very simple of pre-treatment when concave roll is repaired like this, also need not too much processing is done on the concave roll surface, both reduced man-hour like this, increase work efficiency, the number of times that also makes concave roll to repair becomes many, energy-conservation more economically.
Embodiment one
With the BD2 roll is example, the BD2 roll is the omnipotent production line second rolling mill roll, as shown in Figure 1, the top roll of BD2 roll comprises five holes: be followed successively by top roll first hole 1, top roll second hole 2, top roll the 3rd hole 3, top roll the 4th hole 4, top roll the 5th hole 5 from left to right; The lower roll of BD2 roll comprises five holes, and corresponding with the hole of top roll respectively, is followed successively by the lower roll first hole 1a, the lower roll second hole 2a, lower roll the 3rd hole 3a, lower roll the 4th hole 4a, lower roll the 5th hole 5a from left to right.Their laser surface intensified treatment process is as follows:
For top roll first hole 1, top roll second hole 2, the lower roll first hole 1a and the lower roll second hole 2a.As depicted in figs. 1 and 2, kerve is the bottom surface in hole, and protuberance is the projection on the bottom surface, and sidewall is the side in hole, and this three classes position is according to the following table art breading:
Protuberance comprises protruding side and protruding top, and 30mm and flange of rail upper edge 15mm do not handle on the rail head sidewall, and rail head apart from hole top 60mm to 120mm place and flange of rail 30mm at the bottom of the hole press sidewall treatment to the 120mm place, all the other side-walls are pressed speed 1000mm/min processing.
For top roll the 3rd hole 3, top roll the 4th hole 4, lower roll the 3rd hole 3a and lower roll the 4th hole 4a.Participate in illustrated in figures 1 and 2ly, kerve is the bottom surface in hole, and protruding top is the end face of the projection on the bottom surface, and the protuberance chamfering is the chamfering on the protuberance, and sidewall is the side in hole, and the technology at this three classes position sees the following form:
Rail head sidewall upper edge 20mm and flange of rail upper edge 15mm do not handle, if the fatigue layer that exists not turning to fall on the sidewall is removed the corrosion on surface with the rust cleaning emery wheel, and after laser treatment finishes, sanding of flat is carried out on tired surface, and rail head apart from hole top 50mm to 95mm place and flange of rail 30mm at the bottom of the hole press sidewall treatment to the 120mm place, all the other side-walls are pressed speed 900mm/min processing.
For top roll the 5th hole 5 and lower roll the 5th hole 5a.As depicted in figs. 1 and 2, kerve is the bottom surface in hole, and protruding top is the end face of the projection on the bottom surface, and the protuberance chamfering is the chamfering on the protuberance, and sidewall is the side in hole, and the technology at this three classes position sees the following form:
Because 5 holes are last moulding holes, so surface requirements is higher, and the wearing and tearing on its surface are littler than 4 holes, so the technology in 5 holes and 4 holes are different, sidewall herein is meant the flange of rail in 5 holes, and rail head is only handled fillet.Protuberance comprises sidewall and protruding top, and sidewall upper edge 30mm does not handle.
Embodiment two
With the BD1 roll is example, the BD1 roll is for being omnipotent production line first rolling mill roll, the top and bottom rolls of roll respectively has four holes, as shown in Figure 2, four holes of top and bottom rolls are called after top roll one hole 6, lower roll one hole 6a, top roll two holes 7, lower roll two hole 7a, top roll three holes 8, lower roll three hole 8a, top roll four holes 9, lower roll four hole 9a successively from right to left, because top roll one hole 6 and lower roll one hole 6a seldom use, so top roll one hole 6 does not process, the laser surface intensified treatment process in all the other holes is as follows:
Top roll laser reinforcing process such as following table:
The width of the kerve laser treatment of top roll is 220mm, from the centre in hole to each 110mm of both sides.
Lower roll laser reinforcing process such as following table:
Overlap joint is meant is handling adjacent two when regional, the width of two hot spot re-treatment positions.
1, the bullnose of lower roll is handled by the pass intermediate computations to each 110mm of both sides.
2,3 hole sidewall upper edge 15mm does not process.
Embodiment three
With 950 rolls is example, 950 rolls are Φ 950 milling train rolls, the shape of 950 roll top and bottom rolls is identical, its degree of wear is also identical, as shown in Figure 3,950 roll top and bottom rolls respectively comprise 6 holes, called after successively from left to right: topping roll one hole 11, bottom roll one hole 12, topping roll two holes 21, bottom roll two holes 22, topping roll three holes 31, bottom roll three holes 32, topping roll four holes 41, bottom roll four holes 42, topping roll five holes 51, bottom roll five holes 52, topping roll six holes 61, bottom roll six holes 62, their laser surface intensified treatment process sees the following form: because bottom roll is identical with topping roll technology, therefore only list topping roll technology.
Claims (8)
1. concave roll Laser Surface Treatment method may further comprise the steps:
A, record the degree of wear that each position, concave roll surface is compared when not using after use;
B, concave roll is carried out flaw detection;
C, the concave roll that is up to the standards is carried out surface preparation;
D, carry out Laser Surface Treatment, the surface hardness at each position, Laser Surface Treatment concave roll surface increases with its degree of wear.
2. concave roll Laser Surface Treatment method as claimed in claim 1 is characterized in that: in the D step, the penetration of hardness at each position, concave roll surface increases with its degree of wear.
3. concave roll Laser Surface Treatment method as claimed in claim 2 is characterized in that: in the D step, the penetration of hardness at each position, concave roll surface is 1-1.5mm.
4. concave roll Laser Surface Treatment method as claimed in claim 1 is characterized in that: in the D step, what Laser Surface Treatment adopted is the laser melting processing mode.
5. concave roll Laser Surface Treatment method as claimed in claim 1 is characterized in that: in Laser Surface Treatment, laser power is 2050-2400W.
6. concave roll Laser Surface Treatment method as claimed in claim 1 is characterized in that: in Laser Surface Treatment, the overlap distance of adjacent spots is 0.5mm.
7. as the described concave roll Laser Surface Treatment of the arbitrary claim of claim 1 to 6 method, it is characterized in that: in Laser Surface Treatment, laser treatment speed is 800-1500mm/min.
8. as the described concave roll Laser Surface Treatment of the arbitrary claim of claim 1 to 6 method, it is characterized in that: in Laser Surface Treatment, the laser facula size is 4.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010605259 CN102010940A (en) | 2010-12-24 | 2010-12-24 | Laser surface treatment method of pass roll |
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| CN 201010605259 CN102010940A (en) | 2010-12-24 | 2010-12-24 | Laser surface treatment method of pass roll |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710496A (en) * | 2014-01-13 | 2014-04-09 | 攀枝花钢城集团有限公司 | Profile roller repairing method |
| CN106702094A (en) * | 2016-12-14 | 2017-05-24 | 四川国鑫机械制造有限公司 | Laser surface strengthening method for rollers |
| CN106868499A (en) * | 2017-01-18 | 2017-06-20 | 唐山市丰南区天泽科技有限公司 | A kind of reproducing method of pass hot roll |
| WO2018215650A1 (en) * | 2017-05-26 | 2018-11-29 | Walzengiesserei Coswig Gmbh | Surface-hardened, rotationally symmetrical workpiece, hardening method and hardening apparatus |
| CN113414240A (en) * | 2021-06-29 | 2021-09-21 | 首钢水城钢铁（集团）有限责任公司 | Rough rolling roll pass shaping method applied to steel rolling process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101003847A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司协力公司 | Laser surface intensified technique for roller of rolling section bar |
-
2010
- 2010-12-24 CN CN 201010605259 patent/CN102010940A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101003847A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司协力公司 | Laser surface intensified technique for roller of rolling section bar |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710496A (en) * | 2014-01-13 | 2014-04-09 | 攀枝花钢城集团有限公司 | Profile roller repairing method |
| CN103710496B (en) * | 2014-01-13 | 2016-04-20 | 攀枝花钢城集团有限公司 | Section roll restorative procedure |
| CN106702094A (en) * | 2016-12-14 | 2017-05-24 | 四川国鑫机械制造有限公司 | Laser surface strengthening method for rollers |
| CN106868499A (en) * | 2017-01-18 | 2017-06-20 | 唐山市丰南区天泽科技有限公司 | A kind of reproducing method of pass hot roll |
| CN106868499B (en) * | 2017-01-18 | 2019-06-07 | 唐山市丰南区天泽科技有限公司 | A kind of reproducing method of pass hot roll |
| WO2018215650A1 (en) * | 2017-05-26 | 2018-11-29 | Walzengiesserei Coswig Gmbh | Surface-hardened, rotationally symmetrical workpiece, hardening method and hardening apparatus |
| US11697858B2 (en) | 2017-05-26 | 2023-07-11 | Walzengießerei Coswig GmbH | Surface-hardened, rotationally symmetrical workpiece, hardening method and hardening apparatus |
| CN113414240A (en) * | 2021-06-29 | 2021-09-21 | 首钢水城钢铁（集团）有限责任公司 | Rough rolling roll pass shaping method applied to steel rolling process |
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Application publication date: 20110413 |