CN106244794B - A kind of method for improving the cold pilger mill pass life-span - Google Patents
A kind of method for improving the cold pilger mill pass life-span Download PDFInfo
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- CN106244794B CN106244794B CN201610784534.7A CN201610784534A CN106244794B CN 106244794 B CN106244794 B CN 106244794B CN 201610784534 A CN201610784534 A CN 201610784534A CN 106244794 B CN106244794 B CN 106244794B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
A kind of method for improving the cold pilger mill pass life-span disclosed by the invention, including step：Examination is carried out to the finished product cold rolling pass after fine grinding to roll, it is ensured that cold rolling pass meets rolling requirements；Using the maximum weighted region of pass groove as Laser Shock Processing domain, respectively increase by a panel region in Laser Shock Processing domain both sides as laser impact intensified border transition region；Laser impact intensified processing is carried out to Laser Shock Processing domain and laser impact intensified border transition region.Reiforcing laser impact technology is combined by a kind of method in raising cold pilger mill pass life-span of the present invention with cold rolling pass method, the anti-fatigue performance for improving cold rolling pass groove stress area by carrying out laser impact intensified processing to cold pilger mill pass, so that pass service life significantly improves, metal pipe material Rolling Production efficiency is substantially improved because of the decline of pass replacement frequency, and the rolling cost of metal pipe material also declines at double.
Description
Technical field
The invention belongs to metal pipe material cold rolling technology field, and in particular to a kind of side for improving the cold pilger mill pass life-span
Method.
Background technology
Rolling is the main molding mode of metal pipe material, is rolled, passed through by installing a pair of annular distance types on milling train
Upper and lower a pair of Varied sections pass and taper core print, repeat to change in head back and forth movement between each other, reduce pipe diameter,
Wall thickness is thinning.During tube rolling, cold rolling pass groove institute tension stress (component horizontal along pass groove) follows with the cycle
Ring property, pass can be caused fatigue cracking failure occur, this is the Main Patterns of cold pilger mill pass failure damage.Cold rolling pass
Service life on the one hand restrict Rolling Production efficiency, on the other hand and the maximum consumables cost source of tube rolling production.
The content of the invention
It is an object of the invention to provide a kind of method for improving the cold pilger mill pass life-span, solve due to existing cold
It is low so as to increasing rolling cost and the problem of restrict production efficiency to roll pass service life.
The technical solution adopted in the present invention is：A kind of method for improving the cold pilger mill pass life-span, comprises the following steps：
The first step, examination is carried out to the finished product cold rolling pass after fine grinding and rolled, it is ensured that cold rolling pass meets rolling quality requirement；
Second step, using the maximum weighted region of pass groove as Laser Shock Processing domain, in Laser Shock Processing domain
Both sides respectively increase by a panel region as laser impact intensified border transition region；
3rd step, the Laser Shock Processing domain determined in second step and laser impact intensified border transition region are carried out
Laser impact intensified processing.
The features of the present invention also resides in,
The determination method in laser impact intensified border transition region is in second step：For maximum weighted region, with its ET
Position determines circumferential angle scope for anchor point, then obtains Laser Shock Processing domain, each in Laser Shock Processing domain both sides
Increase the laser impact intensified border transition region of 5 ° of -8 ° of conducts.
Carried out in 3rd step in laser impact intensified processing procedure, the intensity of laser-impact is along laser impact intensified border mistake
Cross region close to the side in Laser Shock Processing domain to away from Laser Shock Processing domain side dimension linear successively decrease until
It is zero.
When carrying out laser impact intensified to Laser Shock Processing domain in the 3rd step, laser energy 2J-20J, pulse is wide
It is 1.0mm-5.0mm to spend for 5ns-50ns, effect spot diameter, and hot spot overlapping rate is 10%-90%.
It is laser impact intensified for multiple overlapping reinforcing in 3rd step.
The beneficial effects of the invention are as follows：A kind of method in raising cold pilger mill pass life-span of the present invention is solved due to existing
Some cold rolling pass service life is low so as to increasing rolling cost and the problem of restrict production efficiency.One kind of the present invention improves cold
Reiforcing laser impact technology is combined by the method in pipe mill pass life-span with cold rolling pass method, by cold pilger mill pass
Carry out it is laser impact intensified processing improve cold rolling pass groove stress area anti-fatigue performance so that pass service life into
Improve again, metal pipe material Rolling Production efficiency is substantially improved because of the decline of pass replacement frequency, and the rolling of metal pipe material
Cost also declines at double.
Brief description of the drawings
Fig. 1 is that a kind of method in raising cold pilger mill pass life-span of the present invention acts on the laser-impact of cold rolling pass groove
Strengthening region schematic diagram；
Fig. 2 is that to act on cold rolling pass groove laser-impact strong for a kind of method in raising cold pilger mill pass life-span of the present invention
Change regional perspective schematic diagram；
Fig. 3 is that a kind of method in raising cold pilger mill pass life-span of the present invention carries out laser impact intensified metapore type groove table
Layer participates in stress comparison diagram.
In figure, 1. passes, 2. keyways, 3. tag slots, 4. pass grooves, 5. laser treated regions, 5-1. is laser impact intensified
Region, the laser impact intensified border transition regions of 5-2..
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of method for improving the cold pilger mill pass life-span provided by the invention comprises the following steps：
The first step, examination being carried out to the finished product cold rolling pass 1 after fine grinding and rolled, it is ensured that cold rolling pass 1 meets rolling quality requirement,
Cold rolling pass 1 made of ensuring is rolled by examination need to meet design requirement；
Second step, referring to Fig. 1 and Fig. 2, keyway 2, tag slot 3 and pass groove 4 are provided with pass 1, according to pass groove 4
Position is using the maximum weighted region of pass groove 4 as Laser Shock Processing domain 5-1, in Laser Shock Processing domain 5-1 both sides
One panel region of each increase is as laser impact intensified border transition region 5-2, Laser Shock Processing domain 5-1 and two pieces of laser punchings
Hit reinforcing border transition region 5-2 and collectively form laser treated regions 5；
3rd step, to the Laser Shock Processing domain 5-1 determined in second step and laser impact intensified border transition region
5-2 carries out laser impact intensified processing.
Example, the determination method in laser impact intensified border transition region is in second step：For maximum weighted area
Domain, circumferential angle scope is determined using its ET position as anchor point, you can Laser Shock Processing domain 5-1 is obtained, it is strong in laser-impact
Change the region 5-1 both sides respectively laser impact intensified border transition region 5-2 of 5 ° of -8 ° of conducts of increase.
Carried out in 3rd step in laser impact intensified processing procedure, the intensity of laser-impact is along laser impact intensified border mistake
Region 5-2 is crossed close to Laser Shock Processing domain 5-1 side to the dimension linear away from Laser Shock Processing domain 5-1 sides
Successively decrease until being zero.This ensure that from Laser Shock Processing domain 5-1, laser impact intensified border transition region 5-2 up to
Without laser impact intensified region, laser impact intensified strength decrease so that stress is consistent everywhere for pass groove 4.
Example, when carrying out laser impact intensified to Laser Shock Processing domain 5-1 in the 3rd step, laser energy is
2J-20J, pulse width 5ns-50ns, effect spot diameter are 1.0mm-5.0mm, and hot spot overlapping rate is 10%-90%.
Preferably, laser impact intensified processing repeatedly can carry out repeatedly overlapping intensive treatment in the 3rd step.
Reiforcing laser impact technology is a kind of using caused by short pulse (nanosecond order), big energy (joule level) laser beam
Plasma stock wave, it is laser impact intensified effectively to introduce larger value of residual compressive stress on part top layer, from material
The angle of mechanics says that it can produce residual compressive stress in material surface and make material surface crystal grain refinement, residual compressive stress energy
The fatigue resistance and wear resistance of material are enough effectively improved, therefore by laser impact intensified, cold rolling can be effectively improved
Anti-fatigue performance of the pass in the operation of rolling, so as to greatly improve pass service life.
Referring to Fig. 3, table is quenched by square test block of the above-mentioned laser impact intensified technique to identical orifice type dies Steel material
Face carries out laser-impact, 1# and 2# and handled by laser-impact, and 3# detects test block collimeter without laser-impact processing with XRD
The residual compressive stress of surface layer, and contrasted with not impacting test block, the residual pressure on pass test block impact top layer should after laser-impact
Power improves into the order of magnitude, and in about 1mm depths, its residual compressive stress size still with the residual compressive stress phase after quenching
When.
Rolling comparative trial of life-span is done after pass groove region progress laser-impact to a secondary finished product rolling groove, through detailed
Statistics, laser reinforcing pass complete 1600 billet productions, do not strengthen pass with same batch and averagely roll life span comparison, specifically
Comparing result is shown in Table 1：
The laser reinforcing pass of table 1 is not with strengthening groove rolling life span comparison's table with batch
As shown in Table 1：Pass by laser impact intensified processing relative to the pass without laser impact intensified processing,
Its service life can improve 1.6 times.
Specific pass is carried out using a kind of method in raising cold pilger mill pass life-span of the present invention laser impact intensified
Processing, specifying information are as follows：
Pass：25-17.78/10.02/P/063；
Rolling pass：Φ17.78×2.3→Φ10.02×0.7；
Shock zone：Pass groove deformation section and Strain During Finishing Stage Zone Full；
Laser impact intensified parameter combination example：Optimal value is taken in above-mentioned laser-impact parameter area.
Result of implementation：Device to hole type groove strengthening region surface carries out hand grinding input Rolling Production, rolls 1600 altogether at present
Branch pipe, and pass is not still damaged, is contrasted with the average life span with batch pass under identical rolling condition, laser reinforcing hole
The type life-span improves at least 1.6 times.
Claims (3)
- A kind of 1. method for improving the cold pilger mill pass life-span, it is characterised in that comprise the following steps：The first step, examination is carried out to the finished product cold rolling pass after fine grinding and rolled, it is ensured that cold rolling pass meets rolling quality requirement；Second step, using the maximum weighted region of pass groove as Laser Shock Processing domain, in the Laser Shock Processing domain Both sides respectively one panel region of increase as laser impact intensified border transition region, the laser impact intensified border transition region The method of determination is：For maximum weighted region, circumferential angle scope is determined using its ET position as anchor point, then obtains laser-impact Strengthening region, respectively increase by 5 ° of -8 ° of conducts laser impact intensified edge transitional region in Laser Shock Processing domain both sides Domain；3rd step, laser is carried out to the Laser Shock Processing domain determined in second step and laser impact intensified border transition region Shock peening processing, described to carry out in laser impact intensified processing procedure, the intensity of laser-impact is along described laser impact intensified Border transition region is close to the side in the Laser Shock Processing domain to the side away from Laser Shock Processing domain side To linear decrease until being zero.
- 2. a kind of method for improving the cold pilger mill pass life-span as claimed in claim 1, it is characterised in that in the 3rd step When carrying out laser impact intensified to Laser Shock Processing domain, laser energy 2J-20J, pulse width 5ns-50ns, effect Spot diameter is 1.0mm-5.0mm, and hot spot overlapping rate is 10%-90%.
- 3. a kind of method for improving the cold pilger mill pass life-span as claimed in claim 2, it is characterised in that in the 3rd step Laser impact intensified is multiple overlapping reinforcing.
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| CN201610784534.7A CN106244794B (en) | 2016-08-31 | 2016-08-31 | A kind of method for improving the cold pilger mill pass life-span |
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| CN201610784534.7A CN106244794B (en) | 2016-08-31 | 2016-08-31 | A kind of method for improving the cold pilger mill pass life-span |
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| CN106244794A CN106244794A (en) | 2016-12-21 |
| CN106244794B true CN106244794B (en) | 2018-01-12 |
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| JP6911653B2 (en) | 2017-09-04 | 2021-07-28 | トヨタ自動車株式会社 | Parts manufacturing method and parts |
| CN109339971B (en) * | 2018-12-10 | 2020-04-28 | 广西玉柴机器股份有限公司 | Laser-hardened main bearing cap and method for manufacturing same |
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| CN103602791A (en) * | 2013-12-02 | 2014-02-26 | 湖州市银鑫轧辊有限公司 | Grooved-roller laser surface treatment method |
| CN103710496A (en) * | 2014-01-13 | 2014-04-09 | 攀枝花钢城集团有限公司 | Profile roller repairing method |
| CN104862468A (en) * | 2015-06-11 | 2015-08-26 | 温州大学 | Method for prolonging service life of turbine blade based on laser double-faced impact technique |
| CN104962722A (en) * | 2015-05-25 | 2015-10-07 | 中国南方航空工业(集团)有限公司 | Turbine rotor blade tenon tooth laser shock processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06106284A (en) * | 1992-09-24 | 1994-04-19 | Ishikawajima Harima Heavy Ind Co Ltd | Roll for cold ring rolling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103602791A (en) * | 2013-12-02 | 2014-02-26 | 湖州市银鑫轧辊有限公司 | Grooved-roller laser surface treatment method |
| CN103710496A (en) * | 2014-01-13 | 2014-04-09 | 攀枝花钢城集团有限公司 | Profile roller repairing method |
| CN104962722A (en) * | 2015-05-25 | 2015-10-07 | 中国南方航空工业(集团)有限公司 | Turbine rotor blade tenon tooth laser shock processing method |
| CN104862468A (en) * | 2015-06-11 | 2015-08-26 | 温州大学 | Method for prolonging service life of turbine blade based on laser double-faced impact technique |
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| "制孔工艺对激光强化前后小孔疲劳寿命的影响";姜银方等;《电子科技》;20150815;第28卷(第8期);正文第171-173及177页 * |
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Inventor after: Mao Jijun Inventor after: Shi Qian Inventor after: Shi Hongrui Inventor after: Li Xiaoshan Inventor after: Peng Sheng Inventor after: Wu Nan Inventor after: Gao Bo Inventor after: Li Xiaoying Inventor after: Li Guojie Inventor before: Mao Jijun Inventor before: Shi Qian Inventor before: Li Guojie |
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Effective date of registration: 20180315 Address after: 721000 Titanium City Road, Weibin District, Baoji, Shaanxi Province, No. 1 Co-patentee after: State Nuclear Bao Ti Zirconium Industry Company Patentee after: Northwest Zircocladding Co., Ltd. Address before: 721013 Baoji hi tech Avenue, Baoji, Shaanxi Patentee before: State Nuclear Bao Ti Zirconium Industry Company |