CN103526201A - De-coiler machine shearing blade reparation and strengthening laser cladding method - Google Patents
De-coiler machine shearing blade reparation and strengthening laser cladding method Download PDFInfo
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Abstract
The invention relates to a de-coiler machine shearing blade reparation and strengthening laser cladding method comprising the steps that: (1) a worn de-coiler machine shearing blade is tested and pretreated; (2) laser cladding powder is prepared, wherein WEL LC3558 alloy powder is selected; (3) laser cladding is carried out, wherein a multifunctional numerical control laser processing system and a synchronized powder feeding device are adopted; and (4) post treatment is carried out. According to the invention, when the de-coiler machine shearing blade is repaired, hardness can reach HRC62-63, and grain size is grade 10-11. The cladding layer has no crack, and the internal tissues are uniform and compact. Porosity is lower than 0.5%, and heat-affected zone depth is lower than 0.5mm. The shearing blade is wear-resistant and impact-resistant. The treatment process is short, cost is low, no waste is discharged, and energy consumption is low. With the method, a service life is improved by approximately 5%, and cost is saved by 40-50%.
Description
Technical field
The present invention relates to laser melting and coating technique field, particularly relate to a kind of laser cladding method of opening flat-bed machine cutting edge remediation intensification.
Background technology
Open the main consumable part that flat-bed machine cutting edge is out flat-bed machine, the attrition of its cutting edge is comparatively common.
At present, opening flat-bed machine cutting edge is mainly to adopt the high-grade alloy steel manufactures such as MnCrWV, CrWMn, 9CrWMo, material price substantially all 90-130 unit/kilogram, the price of every cutting edge is 500-1000 unit, work-ing life 7000 tons of left and right, approximately 200 hours, after attrition, reach the cutting edge in work-ing life, mainly take following several mode to process:
1. scrap and melt down, this is the most frequently used processing means of user, but it is very low to reclaim price, metallurgy and foundry processing again simultaneously, and operation is many, energy consumption great ,Fan factory trucking costs is high.
2. weld deposit repairing, although weld deposit repairing can solve some problems, but for most of cutting edge, because its slenderness ratio is larger, after built-up welding, can produce larger distortion, and, bead-welding technology heating zone is large, very large on material impact own, must be through just using after aligning, thermal treatment, high cost.
3. ground, is about to surface abrasion place and directly grinds off, and after reduction height, uses, and the shortcoming of this method is that stock removal is large, and processing charges is high, and grinding number of times is limited, and grinding loss cannot be reclaimed, and precious metal is slatterned in a large number.
Therefore, a kind ofly can fully meet wear-resisting, the durable requirement of cutting edge, and cutting edge remediation intensification method economic, efficient, energy-saving and environmental protection, be current problem urgently to be resolved hurrily.
At present, for example, about utilizing wear resistant alloy cladding layer patent and the report of laser melting and coating process Preparation equipment parts a lot:
China Patent Publication No. is the application of CN 102094111, " a kind of bar hot shear blade laser-quenching manufacturing process " providing, its feature is to scribble with laser apparatus rapid scanning the new cutting edge surface of light-absorbing coating, make cutting edge surface realize rapid heating and cooling, produce phase transformation and improve its hardness, and then improve its wear resisting property.
China Patent Publication No. is the application of CN 1136485, " composite shearing blade for shearing hot steel billet and its manufacture method " providing, its feature is first welded austenite base steel intermediate layer on old cutting edge matrix, thereupon at intermediate layer built-up welding Co-Cr-W or Co-Cr base alloy working lining.
China Patent Publication No. is the application of CN101338425, " the railroad switch sliding bed surface abrasion resistance non-corrosive alloy cladding layer laser melting and coating process " providing, comprise following technological process: first slide plate surface preparation, at room temperature degreasing and rust removal is carried out in slide plate surface, and clean up with alcohol; Then be the preset of powdered alloy, handle is surperficial until the iron-based of cladding, slide plate Ni-based or that Co-based alloy powder is preset in after above-mentioned processing, and use with the floating rule of guide rail and adjust prealloyed powder, make it to be evenly distributed on slide plate surface and there is suitable thickness, to meet the requirement of cladding layer thickness after cladding; Be finally laser melting coating strengthening slide plate, select gas CO
2laser apparatus, worktable is numerically-controlled machine, on slide plate surface, carries out laser melting coating strengthening.
China Patent Publication No. is the application of CN101519778A, adopts laser at perforating head surface preparation WC ceramic particle, strengthens Co base composite coating, and coating and matrix are metallurgical binding, have improved the bonding force of coating and matrix; Coat-thickness maximum can reach several millimeters; The coated Ni in WC particle surface, can reduce the absorption of WC to laser energy, reduces it at the burn out rate of laser molten pool.WC particle is evenly distributed in coating, has high coating hardness, improves the use properties of top, increases the service life.
Though above-mentioned technical scheme can reinforced portion purposes cutting edge or utilize laser melting and coating process to carry out wear-resisting cladding layer processing to equipment component parts, obtain certain technique effect.
But, for the equipment unit of opening flat-bed machine cutting edge, its main source of damage, except contact wearing and tearing, also there is very large shock stress, and under the effect of HI high impact repeated stress, not only needing has higher hardness, also needs to have good basal body binding force and shock resistance, anti-fatigue performance for a long time.
Summary of the invention
The object of the present invention is to provide a kind of laser cladding method of opening flat-bed machine cutting edge remediation intensification.
For this reason, the present invention selects a kind of laser cladding powder powder material, and, adopted a kind of laser melting and coating technique of specific step, the flat-bed machine cutting edge of opening after wearing and tearing is repaired, strengthen its performance.
Technical scheme of the present invention is achieved in that
According to the laser cladding method of opening flat-bed machine cutting edge remediation intensification of the present invention, it comprises the steps:
(1) flat-bed machine cutting edge is opened in wearing and tearing detection and pre-treatment, carry out size, planeness, inner carrying out flaw detection, removes surperficial rusty stain, greasy dirt, and abrading section is predicted and mark;
(2) preparation of laser cladding powder, according to laser melting coating expense, measures WEL LC3558 powdered alloy, dries, standby;
(3) laser cladding method, adopt multifunctional numerical control laser-processing system and synchronous powder feeding system device, regulate powder feeding rate, use argon gas that powdered alloy is directly sent into laser molten pool, under high power focused laser beam effect, make laser cladding layer opening flat-bed machine cutting edge surface;
The processing parameter of its laser melting coating is:
Condensing lens f=300～400mm,
Cladding power P=3000～4000W,
Spot diameter D=3～5mm,
Scan velocity V=1000～l500mm/min,
Overlapping rate 45～55%;
(4) subsequent disposal, to opening flat-bed machine cutting edge after laser melting coating, adopts surface grinding machine to carry out ground finish, makes sharp, same group of cutting edge consistent size of cutting edge.
According to the laser cladding method of opening flat-bed machine cutting edge remediation intensification of the present invention, it is characterized in that, in the preparation step of described laser cladding powder, WEL LC3558 powdered alloy is being dried
In case, adopt 200 ℃ and dry 2-3 hour, standby;
Described common argon gas is that purity is 99.6% argon gas, adopts pneumatic automatic powder feeding system that powdered alloy is directly sent into laser molten pool.
Processing parameter in laser cladding method step of the present invention is:
Condensing lens f=300～400mm,
Cladding power P=3500～3800W,
Spot diameter D=3～3.5mm,
Scan velocity V=1000～l200mm/min,
Overlapping rate 48～52%.
According to the laser cladding method of opening flat-bed machine cutting edge remediation intensification of the present invention, it is characterized in that, the performance index of making laser cladding layer are: hardness is HRC62～63, and grain fineness number is 10～11 grades, and porosity is less than 0.5%, and the heat affected zone degree of depth is less than 0.5mm.
In the preparation step of above-mentioned steps (2) laser cladding powder, select WEL LC3558 powder, a kind of high rigidity iron-based powder for the production of Belgian Hoeganaes Corp., the domestic trade mark is: prestige continuous heavy rain 3558, the hardness of the laser cladding layer that this powder is made is greater than HRC58, can meet out flat-bed machine cutting edge hardness demand; Powder size is 53～150 μ m, is applicable to laser melting coating.
In the preparation step of above-mentioned steps (2) laser cladding powder, through inventor's test of many times, prove,
WEL LC3558 powdered alloy, must dry, generally in drying baker, adopt 200 ℃ to dry 2-3 hour, the WEL LC3558 powdered alloy of not drying, after laser melting coating, the void content of the laser cladding layer of making is 1.5～2.5%, cannot meet out the specified requirement of flat-bed machine cutting edge to void content, through the powdered alloy of drying, the void content of the laser cladding layer of making is less than 0.5%, reaches or higher than the standard-required of opening flat-bed machine cutting edge void content.
Common argon gas of the present invention is that purity is 99.6% argon gas, adopts pneumatic automatic powder feeding system that powdered alloy is directly sent into laser molten pool.In above-mentioned steps (3) laser cladding method step, using argon gas and pneumatic automatic powder feeding system, is because argon gas, except the effect of powder feeding, can play a protective role to laser molten pool simultaneously, in laser cladding process, reduces powder ablation and oxidation.And with the conventional preset automatic powder feeding system melting and coating process contrast of gravity, the performance index of its cladding layer have marked difference.
Following table is WEL LC3558 powdered alloy, under same melting and coating process condition, uses the performance index of the preset automatic powder feeding system contrast of argon gas and pneumatic automatic powder feeding system and gravity cladding layer:
| Classification | The preset automatic powder feeding system of gravity | The pneumatic automatic powder feeding system of argon gas |
| Grain fineness number | 9～10 grades | 10～11 grades |
| The heat affected zone degree of depth | 0.5～0.8mm | 0.35～0.45mm |
| Hardness | HRC 58～60 | HRC 62～63 |
The pneumatic automatic powder feeding system of employing of the present invention, directly sends powdered alloy into laser molten pool and carries out after cladding, and it is best that its performance can reach.
The laser melting and coating technique that the present invention adopts, carries out remediation intensification and opens flat-bed machine cutting edge, has following characteristics:
(1) laser energy density is high, and action time is short, and the heat affected zone of body material and the distortion producing due to machining stress are less;
(2) cladding layer even structure is fine and closely woven, and microdefect is little, and associativity is high, excellent performance;
(3) cladding layer and basal body interface are metallurgical binding, its fine microstructures, and cladding layer composition and thinning ratio are controlled, can realize constituency cladding, and, realize automatization remediation intensification.
Remediation intensification of the present invention open flat-bed machine cutting edge, excellent performance, both wear-resisting, shock-resistant again.Meanwhile, the subsequent processes of processing step is short, expense is low, few without any waste discharge, energy consumption.
Remediation intensification of the present invention open flat-bed machine cutting edge, improved for approximately 5% work-ing life, meanwhile, saved again 40～50% cost.
Embodiment
Embodiment 1:
Remediation intensification method comprises the following steps:
(1) flat-bed machine cutting edge is opened in wearing and tearing detection and pre-treatment
The flat-bed machine cutting edge of opening to wearing and tearing carries out size, planeness, inner carrying out flaw detection, and, remove surperficial rusty stain, greasy dirt, to abrading section premeasuring, carry out mark;
(2) preparation of laser cladding powder powder material
What this processed one group of 4 1250*80*25mm opens flat-bed machine cutting edge, gets the WEL LC3558 powdered alloy of 1Kg according to its degree of wear, dries 2 hours in the drying baker of 200 ℃, standby;
(3) laser cladding method
Select HGL-5000 type multifunctional numerical control laser-processing system, use the common argon gas that purity is 99.6%, adopt pneumatic automatic powder feeding system, powdered alloy is directly sent into laser molten pool, and under high power focused laser beam effect, at the laser cladding layer of opening flat-bed machine cutting edge surface formation even compact.This process argon pressure is adjusted to 0.3MPa, and flow is 5L/min,
Laser cladding method parameter is as follows:
Condensing lens f=300mm,
Cladding power P=3800W,
Spot diameter D=3mm,
Scan velocity V=1000mm/min,
Overlapping rate 50%.
(4) subsequent disposal
Adopt surface grinding machine to carry out ground finish, make sharp and same group of cutting edge open flat-bed machine cutting edge consistent size,
After remediation intensification, open flat-bed machine cutting edge cladding layer, with the test of ultrasonic wave hardness tester, hardness is HRC62～63, and grain fineness number is 10 grades, metallographic detects, and does not find pore, cladding layer flawless, interior tissue is even, fine and close, and porosity is 0.5%, and the heat affected zone degree of depth is 0.40mm.
The former new product price of opening flat-bed machine cutting edge of this group is 4000 yuan, can cut dull and stereotyped 6500 tons, approximately 190 hours work-ing life.Use after attrition, after laser cladding method remediation intensification, open flat-bed machine cutting edge, can cut 6850 tons of same specification opening plates, in approximately 200 hours work-ing life, 2000 yuan of remediation intensification expenses, have saved 50% cost.
Embodiment 2:
Remediation intensification method comprises the following steps:
(1) flat-bed machine cutting edge is opened in wearing and tearing detection and pre-treatment:
The flat-bed machine cutting edge of opening to wearing and tearing carries out size, planeness, inner carrying out flaw detection, and, remove surperficial rusty stain, greasy dirt, to abrading section premeasuring, carry out mark;
(2) preparation of laser cladding powder powder material:
What this processed one group of 10 580*80*25mm opens flat-bed machine cutting edge, gets the WEL LC3558 powdered alloy of 1.5Kg according to its degree of wear, dries 3 hours in the drying baker of 200 ℃, standby;
(3) laser cladding method: select HGL-5000 type multifunctional numerical control laser-processing system, use common argon gas, adopt pneumatic automatic powder feeding system, powdered alloy is directly sent into laser molten pool, and under high power focused laser beam effect, at the laser cladding layer of opening flat-bed machine cutting edge surface formation even compact.This process argon pressure is adjusted to 0.25MPa, and flow is 6L/min,
Laser cladding method parameter is as follows:
Condensing lens f=400mm,
Cladding power P=3500W,
Spot diameter D=3.2mm,
Scan velocity V=1200mm/min,
Overlapping rate 50%,
(4) subsequent disposal:
Adopt surface grinding machine to carry out ground finish, make sharp and same group of cutting edge open flat-bed machine cutting edge consistent size,
After remediation intensification, open flat-bed machine cutting edge cladding layer, with the test of ultrasonic wave hardness tester, hardness is HRC 62～63, and grain fineness number is 11 grades, metallographic detects, and does not find pore, cladding layer flawless, interior tissue is even, fine and close, and porosity is 0.5%, and the heat affected zone degree of depth is about 0.35mm.
The former new product price of opening flat-bed machine cutting edge of this group is 5000 yuan, can cut dull and stereotyped 7000 tons, approximately 200 hours work-ing life, use after attrition, after laser cladding method remediation intensification, open flat-bed machine cutting edge, can cut 7200 tons of same specification opening plates, approximately 210 hours work-ing life, 3000 yuan of remediation intensification expenses, save 40% cost.
Claims (5)
1. a laser cladding method of opening flat-bed machine cutting edge remediation intensification, is characterized in that, comprises the steps:
(1) flat-bed machine cutting edge is opened in wearing and tearing detection and pre-treatment, carry out size, planeness, inner carrying out flaw detection, removes surperficial rusty stain, greasy dirt, and abrading section is predicted and mark;
(2) preparation of laser cladding powder, according to laser melting coating expense, measures WEL LC3558 powdered alloy, dries, standby;
(3) laser cladding method, adopt multifunctional numerical control laser-processing system and synchronous powder feeding system device, regulate powder feeding rate, use argon gas that powdered alloy is directly sent into laser molten pool, under high power focused laser beam effect, make laser cladding layer opening flat-bed machine cutting edge surface;
Wherein, the processing parameter of laser melting coating is:
Condensing lens f=300～400mm,
Cladding power P=3000～4000W,
Spot diameter D=3～5mm,
Scan velocity V=1000～l500mm/min,
Overlapping rate 45～55%;
(4) subsequent disposal, to opening flat-bed machine cutting edge after laser melting coating, adopts surface grinding machine to carry out ground finish, makes sharp, same group of cutting edge consistent size of cutting edge.
2. the laser cladding method of opening flat-bed machine cutting edge remediation intensification according to claim 1, is characterized in that, in the preparation step of described laser cladding powder, adopts 200 ℃ to dry 2-3 hour WEL LC3558 powdered alloy in drying baker, standby.
3. the laser cladding method of opening flat-bed machine cutting edge remediation intensification according to claim 1, is characterized in that described common argon gas is that purity is 99.6% argon gas, adopts pneumatic automatic powder feeding system that powdered alloy is directly sent into laser molten pool.
4. the laser cladding method of opening flat-bed machine cutting edge remediation intensification according to claim 1, is characterized in that, the processing parameter in described laser cladding method step is:
Condensing lens f=300～400mm,
Cladding power P=3500～3800W,
Spot diameter D=3～3.5mm,
Scan velocity V=1000～l200mm/min,
Overlapping rate 48～52%.
5. the laser cladding method of opening flat-bed machine cutting edge remediation intensification according to claim 1, it is characterized in that, the performance index of making laser cladding layer are: hardness is HRC62～63, and grain fineness number is 10～11 grades, porosity is less than 0.5%, and the heat affected zone degree of depth is less than 0.5mm.
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Cited By (7)
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| CN104656437A (en) * | 2014-12-03 | 2015-05-27 | 郑州轻工业学院 | Method for predicting surface size of laser cladding layer based on processing parameters |
| CN107447214A (en) * | 2017-08-11 | 2017-12-08 | 江苏中科大港激光科技有限公司 | A kind of laser diffusion alloy method of rotary digging tooth denticle surface peening |
| CN108914117A (en) * | 2018-07-25 | 2018-11-30 | 刘常利 | A kind of intensifying method and cutter head of shield machine of cutter head of shield machine |
| CN109023349A (en) * | 2018-08-29 | 2018-12-18 | 安徽工程大学 | A method of improving used in aluminium alloy casting metal type dies laser melting coating repair layer binding force |
| CN110284134A (en) * | 2019-06-20 | 2019-09-27 | 上海岳乾激光科技有限公司 | A kind of laser cladding repair technique of rotary cutter edge |
| CN110760839A (en) * | 2019-11-15 | 2020-02-07 | 南京辉锐光电科技有限公司 | Laser cladding method |
| CN114540807A (en) * | 2020-11-25 | 2022-05-27 | 宝武装备智能科技有限公司 | Method for repairing and PVD surface strengthening of cutting edge of disc shear blade |
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| CN104656437A (en) * | 2014-12-03 | 2015-05-27 | 郑州轻工业学院 | Method for predicting surface size of laser cladding layer based on processing parameters |
| CN104656437B (en) * | 2014-12-03 | 2017-07-14 | 郑州轻工业学院 | The method that laser cladding layer surface size is predicted based on machined parameters |
| CN107447214A (en) * | 2017-08-11 | 2017-12-08 | 江苏中科大港激光科技有限公司 | A kind of laser diffusion alloy method of rotary digging tooth denticle surface peening |
| CN108914117A (en) * | 2018-07-25 | 2018-11-30 | 刘常利 | A kind of intensifying method and cutter head of shield machine of cutter head of shield machine |
| CN109023349A (en) * | 2018-08-29 | 2018-12-18 | 安徽工程大学 | A method of improving used in aluminium alloy casting metal type dies laser melting coating repair layer binding force |
| CN110284134A (en) * | 2019-06-20 | 2019-09-27 | 上海岳乾激光科技有限公司 | A kind of laser cladding repair technique of rotary cutter edge |
| CN110284134B (en) * | 2019-06-20 | 2021-07-09 | 上海岳乾激光科技有限公司 | Laser cladding repair process for disc shear blade |
| CN110760839A (en) * | 2019-11-15 | 2020-02-07 | 南京辉锐光电科技有限公司 | Laser cladding method |
| CN114540807A (en) * | 2020-11-25 | 2022-05-27 | 宝武装备智能科技有限公司 | Method for repairing and PVD surface strengthening of cutting edge of disc shear blade |
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Application publication date: 20140122 |