CN111549342A - Laser cladding repair method for double-row chain wheel - Google Patents
Laser cladding repair method for double-row chain wheel Download PDFInfo
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- CN111549342A CN111549342A CN202010536992.5A CN202010536992A CN111549342A CN 111549342 A CN111549342 A CN 111549342A CN 202010536992 A CN202010536992 A CN 202010536992A CN 111549342 A CN111549342 A CN 111549342A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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Abstract
The invention discloses a laser cladding repairing method for a double-row chain wheel, which relates to the technical field of laser cladding remanufacturing and comprises the following operation steps: s1, the three-dimensional laser imaging device scans the workpiece to be repaired, the electronic equipment obtains the scanning result of the three-dimensional laser imaging device, and software in the electronic equipment performs data processing on the scanning result to obtain a preset path of the laser equipment; s2, clamping the workpiece to be repaired by the clamping piece, driving the clamping piece to be driven to rotate by the motor, coating the cladding agent on the surface of the workpiece to be repaired and carrying out laser cladding on the workpiece to be repaired by the laser equipment under fixed power according to the preset path x obtained in the step S1, and controlling the retention time y of the workpiece to be repaired by the motor; s3, slowly cooling the cladded workpiece to be repaired to-15-30 ℃, tempering at 175-215 ℃ for 2.75-3.25h, and finally tempering at 485-515 ℃ for 1.25-1.75h, and realizing one-step molding repair of the key vulnerable part double-row chain wheel of the mining scraper conveyor by using a method combining laser cladding and 3D printing.
Description
Technical Field
The invention relates to the technical field of laser cladding remanufacturing, in particular to a laser cladding repairing method for a double-row chain wheel.
Background
The chain wheel shaft group is a key part of the scraper conveyor and comprises a chain wheel, a shaft, a bearing seat, a bearing, an oil seal and the like. When the scraper conveyor works, a scraper chain performs closed circulation operation around a chain wheel, a pair of kinematic pairs is formed by a chain ring and a chain nest of the chain wheel in operation, the chain wheel is extruded by each engagement, sliding friction and abrasive abrasion can be generated, and then the chain nest part bears huge alternating load and additional impact load, so that the chain wheel is seriously abraded due to complex working conditions, the chain wheel (made of 42CrMo and above) is quickly abraded, the chain can be separated and jumped after abrasion, the chain cannot be well engaged and the abrasion of a new chain is accelerated if the chain wheel is not replaced in time, and great influence is caused on production. Wear and tear in the form of sprockets accounts for over 10% of mining equipment and therefore it has a significant impact on the life safety of miners and the economic benefits of coal mines. In order to bear force and mesh uniformly, a pair of double-row chain wheels need to be replaced simultaneously, retired products are mechanical parts with a large number of defects, if the retired products are directly scrapped, huge waste is caused, and the serious pollution problem is caused, the manufacturing period of a new chain wheel is about two months, the production progress is influenced, the price of each pair of double-row chain wheels is about three thousand yuan, and the double-row chain wheels are usually repaired and reused for cost saving.
Under the background, green remanufacturing technologies based on advanced surface engineering technologies, such as surfacing, brush plating, arc spraying, laser cladding and the like, are receiving more and more attention. The most surfacing welding is used in repair, welding rods such as D212, D397, J857Cr and the like are usually adopted, the surfacing welding technology is usually suitable for field welding due to simple equipment, reliable use, flexible operation and low cost, but 42CrMo has poor weldability, so that hardening tissues are easy to crack during welding, the rejection rate is high, the hardness is high after surfacing welding, the thickness is uneven, the processing is difficult, and the surfacing welding technology is only suitable for simple repair; due to low precision and large stress, the application of the electric brush plating and the electric arc spraying is restricted by the large heated area; laser cladding has been rapidly developed in fine mining repair in recent years due to the advantages of low heat input, quick fixation, cleaner, lower dilution, small workpiece deformation, fine grains, high strength and hardness, quick repair, high yield and the like. A large amount of researches obtain certain results in the aspect of influence of process parameters on the geometric characteristics and the performance of single-channel laser cladding on the surface of the 42CrMo alloy, but the problems of incomplete process parameter selection, unreasonable dilution rate evaluation interval, incomplete data statistical processing method and the like still exist. At present, no relevant report of performing one-time molding repair on the double-row chain wheel of the mining scraper conveyor by using a mode of combining laser cladding and 3D printing exists.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a laser cladding repair method for a double-row chain wheel, which realizes one-time molding repair of the double-row chain wheel of a key vulnerable part of a mining scraper conveyor by using a method combining laser cladding and 3D printing.
A laser cladding repair method for a double-row chain wheel comprises the following operation steps:
s1, the three-dimensional laser imaging device scans the workpiece to be repaired, the electronic equipment obtains the scanning result of the three-dimensional laser imaging device, and software in the electronic equipment performs data processing on the scanning result to obtain a preset path of the laser equipment;
s2, clamping the workpiece to be repaired by the clamping piece, driving the clamping piece to be driven to rotate by the motor, coating the cladding agent on the surface of the workpiece to be repaired and carrying out laser cladding on the workpiece to be repaired by the laser equipment under fixed power according to the preset path x obtained in the step S1, and controlling the retention time y of the workpiece to be repaired by the motor;
s3, slowly cooling the workpiece to be repaired after cladding to-15-30 ℃, then tempering for 2.75-3.25h at 175-.
Preferably, the three-dimensional laser imaging device in S1 is an OKIO-400 type photographic raster three-dimensional scanner.
Preferably, the electronic device in S1 performs data processing through geogenic Studio software.
Preferably, the laser device in S2 includes a laser, a laser cladding quenching head, a powder feeding nozzle and a control system, where the powder feeding nozzle is used to spray cladding agent to the workpiece to be repaired, and the laser cladding quenching head are used in cooperation to perform laser cladding on the workpiece to be repaired.
Preferably, the laser is a laser LDF4000-30 laser and the power is 1 kw.
Preferably, the powder feeding speed of the powder feeding nozzle is 2.81 g/min.
Preferably, the cladding agent is composed of iron powder, carbon powder, silicon powder, chromium powder, cerium oxide powder and boron powder.
Preferably, the cladding agent is prepared by mixing 88 wt% of iron powder, 0.2 wt% of carbon powder, 0.8 wt% of silicon powder, 9.8 wt% of chromium powder, 0.2 wt% of cerium oxide powder and 1 wt% of boron powder.
Preferably, the preset path x of the laser generated by the laser device in S2 and the residence time y of the workpiece to be repaired satisfy the relation: y is 32.33x +160, where x is in μm and y is in ms.
Preferably, the workpiece to be repaired after cladding in S3 is tempered at 200 ℃ for 3h, and tempered at 500 ℃ for 1.5 h.
The invention has the beneficial effects that:
the laser cladding repair method for the duplex chain wheel provided by the invention creatively applies laser cladding combined with 3D printing to the intelligent repair of the duplex chain wheel of the mining scraper conveyor, obviously improves the wear-resisting, corrosion-resisting, heat-resisting and oxidation-resisting properties of the surface of the base layer of the duplex chain wheel, so as to achieve the purpose of surface modification or repair, not only meets the requirement on the specific performance of the surface of the material, but also saves a large amount of precious elements, and the cladding layer on the surface of the duplex chain wheel can reach and exceed the hardness and high wear resistance of the base body.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a metallographic structure photograph of a workpiece to be repaired after laser cladding in an embodiment of the present invention;
in fig. 1: 1-cladding area, 2-transition area, 3-substrate; the cladding area and the transition area are naturally connected, the combination degree is high, and the cladding layer structure is finer than that of the matrix;
FIG. 2 is a metallographic structure photograph of a workpiece to be repaired after laser cladding in an embodiment of the present invention, and it can be seen that the matrix and the transition region can be well fused, and hard particles all enter the matrix;
FIG. 3 is a graph illustrating impedance curves of a workpiece to be repaired before and after cladding in an embodiment of the present invention;
FIG. 4 is a polarization curve of a workpiece to be repaired before and after cladding in an embodiment of the invention;
FIGS. 3 and 4 can better illustrate the improved corrosion resistance of the clad workpiece, and the corrosion resistance of the clad workpiece can be realized in a more severe environment;
FIG. 5 shows the Vickers hardness of the cross section of the cladding layer after cladding the workpiece to be repaired in an embodiment of the invention, and the hardness of the cladding layer is found to be more than 2 times stronger than that of the substrate;
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
A laser cladding repair method for a double-row chain wheel comprises the following operation steps:
s1, scanning the to-be-repaired workpiece by an OKIO-400 type photographic grating three-dimensional scanner to obtain three-dimensional data of the to-be-repaired workpiece, acquiring a scanning result of the OKIO-400 type photographic grating three-dimensional scanner by a computer, and performing data processing by Geomagic Studio software;
the Geomagic Studio is used as the fastest software for converting three-dimensional scanning data into a parameterized CAD model and a three-dimensional CAD model, and provides four processing modules which are respectively: processing of scan data (capture), polygon editing (wrp), NURBS surface modeling (shape), CAD surface modeling (washion);
s2, the clamping piece clamps the workpiece to be repaired, the servo motor drives the clamping piece to drive the workpiece to be repaired to rotate, the laser equipment coats the cladding agent on the surface of the workpiece to be repaired according to the preset path x obtained in the S1 under the fixed power of 1kw and carries out laser cladding on the workpiece, and the preset path x of the laser and the residence time y of the workpiece to be repaired meet the relational expression: y is 32.33x +160, because the power of the existing laser cannot be changed linearly, the input heat is difficult to be accurately controlled under the condition of constant residence time, the invention controls the angular speed of the workpiece to be repaired to control the residence time of the workpiece to be repaired by controlling the angular speed of the workpiece to be repaired by a servo motor, so that the laser has constant power, the cladding time is controllable, the output heat is controlled, the cracking phenomenon caused by heat accumulation can be effectively prevented, and the cladding effect is better; y is 32.33x +160, which is an empirical formula obtained by measuring multiple groups of data through actual tests, calculating the data by using a least square method and finely adjusting the data in a large number of tests;
the laser equipment comprises a laser LDF4000-30 laser, a laser cladding quenching head, a powder feeding nozzle and a control system, wherein the powder feeding nozzle is used for spraying cladding agent to a workpiece to be repaired, the powder feeding speed is 2.81g/min, the laser and the laser cladding quenching head are matched for carrying out laser cladding on the workpiece to be repaired, and the control system can control the powder feeding speed of the powder feeding nozzle and the power of the laser, receive a laser path obtained by the electronic equipment through software processing, send an instruction to the laser and the like;
the cladding agent is prepared by mixing 88 wt% of iron powder, 0.2 wt% of carbon powder, 0.8 wt% of silicon powder, 9.8 wt% of chromium powder, 0.2 wt% of cerium oxide powder and 1 wt% of boron powder, and the iron base can be mixed with 42CrMo steel forms better fusion, reduces crack sensitivity, and carbon can form hard Cr with Cr6C and Cr7C3Etc. to enhance the wear resistance of the workpiece cladding layer, carbon can form ferrite with iron to adjust the hardness of the cladding layer, boron forms a large number of dislocations to improve the strength of the cladding layer, and forms compound, CeO, with iron2Second phase ions can be formed to perform a binding action on dislocation to improve the strength, and inclusions, particularly sulfides, in the cladding layer are refined, so that grains are refined;
s3, slowly cooling the to-be-repaired workpiece after cladding to 25 ℃, wherein the slow cooling can be performed in a mode of covering and standing by heat preservation cotton, then tempering is performed for 3 hours at 200 ℃, and finally tempering is performed for 1.5 hours at 500 ℃, the tempering is performed in a tempering furnace, and the low-temperature tempering and the high-temperature tempering are performed firstly and then, so that the residual stress of the to-be-repaired workpiece can be eliminated, and cracking is prevented.
The three-dimensional laser imaging device and the laser equipment are arranged on the production line, so that repeated operation can be performed without frequent change of programs and parameters, the repaired workpiece has small error and high qualification rate, the influence of a plurality of human factors can be avoided, the automation degree is high, and the three-dimensional laser imaging device and the laser equipment are suitable for large-scale production.
Example 2
A laser cladding repair method for a double-row chain wheel comprises the following operation steps:
s1, scanning the to-be-repaired workpiece by an OKIO-400 type photographic grating three-dimensional scanner to obtain three-dimensional data of the to-be-repaired workpiece, acquiring a scanning result of the OKIO-400 type photographic grating three-dimensional scanner by a computer, and performing data processing by Geomagic Studio software;
s2, the clamping piece clamps the workpiece to be repaired, the servo motor drives the clamping piece to drive the workpiece to be repaired to rotate, the laser equipment coats the cladding agent on the surface of the workpiece to be repaired according to the preset path x obtained in the S1 under the fixed power of 1kw and carries out laser cladding on the workpiece, and the preset path x of the laser and the residence time y of the workpiece to be repaired meet the relational expression: y is 32.33x +160, because the power of the existing laser cannot be changed linearly, the input heat is difficult to be accurately controlled under the condition of constant residence time, the invention controls the angular speed of the workpiece to be repaired to control the residence time of the workpiece to be repaired by controlling the angular speed of the workpiece to be repaired by a servo motor, so that the laser has constant power, the cladding time is controllable, the output heat is controlled, the cracking phenomenon caused by heat accumulation can be effectively prevented, and the cladding effect is better; y is 32.33x +160, which is an empirical formula obtained by measuring multiple groups of data through actual tests, calculating the data by using a least square method and finely adjusting the data in a large number of tests;
the cladding agent is formed by mixing 88.4 wt% of iron powder, 0.25 wt% of carbon powder, 0.85 wt% of silicon powder, 9.3 wt% of chromium powder, 0.2 wt% of cerium oxide powder and 1 wt% of boron powder, the iron base can be better fused with 42CrMo steel, the crack sensitivity is reduced, and the carbon can form hard Cr with chromium6C and Cr7C3Etc. to enhance the wear resistance of the workpiece cladding layer, carbon can form ferrite with iron to adjust the hardness of the cladding layer, boron forms a large number of dislocations to improve the strength of the cladding layer, and forms compound, CeO, with iron2Second phase ions can be formed to perform a binding action on dislocation to improve the strength, and inclusions, particularly sulfides, in the cladding layer are refined, so that grains are refined;
s3, slowly cooling the to-be-repaired workpiece after cladding to 30 ℃, wherein the slow cooling can be performed in a mode of covering and standing by heat preservation cotton, then tempering is performed for 2.75 hours at 215 ℃, and finally tempering is performed for 1.75 hours at 500 ℃, the tempering is performed in a tempering furnace, and the low-temperature tempering and the high-temperature tempering are performed firstly and then, so that the residual stress of the to-be-repaired workpiece can be eliminated, and cracking is prevented.
Example 3
A laser cladding repair method for a double-row chain wheel comprises the following operation steps:
s1, scanning the to-be-repaired workpiece by an OKIO-400 type photographic grating three-dimensional scanner to obtain three-dimensional data of the to-be-repaired workpiece, acquiring a scanning result of the OKIO-400 type photographic grating three-dimensional scanner by a computer, and performing data processing by Geomagic Studio software;
s2, the clamping piece clamps the workpiece to be repaired, the servo motor drives the clamping piece to drive the workpiece to be repaired to rotate, the laser equipment coats the cladding agent on the surface of the workpiece to be repaired according to the preset path x obtained in the S1 under the fixed power of 1kw and carries out laser cladding on the workpiece, and the preset path x of the laser and the residence time y of the workpiece to be repaired meet the relational expression: y is 32.33x +160, because the power of the existing laser cannot be changed linearly, the input heat is difficult to be accurately controlled under the condition of constant residence time, the invention controls the angular speed of the workpiece to be repaired to control the residence time of the workpiece to be repaired by controlling the angular speed of the workpiece to be repaired by a servo motor, so that the laser has constant power, the cladding time is controllable, the output heat is controlled, the cracking phenomenon caused by heat accumulation can be effectively prevented, and the cladding effect is better; y is 32.33x +160, which is an empirical formula obtained by measuring multiple groups of data through actual tests, calculating the data by using a least square method and finely adjusting the data in a large number of tests;
the cladding agent is formed by mixing 88 wt% of iron powder, 0.3 wt% of carbon powder, 0.9 wt% of silicon powder, 9.7 wt% of chromium powder, 0.3 wt% of cerium oxide powder and 0.8 wt% of boron powder, the iron base can be better fused with 42CrMo steel, the crack sensitivity is reduced, and the carbon can form hard Cr with chromium6C and Cr7C3Etc. to enhance the wear resistance of the workpiece cladding layer, carbon can form ferrite with iron to adjust the hardness of the cladding layer, boron forms a large number of dislocations to improve the strength of the cladding layer, and forms compound, CeO, with iron2Second phase ions can be formed to perform a binding action on dislocation to improve the strength, and inclusions, particularly sulfides, in the cladding layer are refined, so that grains are refined;
s3, slowly cooling the to-be-repaired workpiece after cladding to 30 ℃, wherein the slow cooling can be performed in a mode of covering and standing by heat preservation cotton, then tempering is performed for 2.85 hours at 195 ℃, and finally tempering is performed for 1.5 hours at 505 ℃, the tempering is performed in a tempering furnace, and the low-temperature tempering and the high-temperature tempering are performed firstly, so that the residual stress of the to-be-repaired workpiece can be eliminated, and cracking is prevented.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A laser cladding repair method for a double-row chain wheel is characterized by comprising the following steps: the method comprises the following operation steps:
s1, the three-dimensional laser imaging device scans the workpiece to be repaired, the electronic equipment obtains the scanning result of the three-dimensional laser imaging device, and software in the electronic equipment performs data processing on the scanning result to obtain a preset path of the laser equipment;
s2, clamping the workpiece to be repaired by the clamping piece, driving the clamping piece to be driven to rotate by the motor, coating the cladding agent on the surface of the workpiece to be repaired and carrying out laser cladding on the workpiece to be repaired by the laser equipment under fixed power according to the preset path x obtained in the step S1, and controlling the retention time y of the workpiece to be repaired by the motor;
s3, slowly cooling the workpiece to be repaired after cladding to-15-30 ℃, then tempering for 2.75-3.25h at 175-.
2. The laser cladding repair method for the double-row sprocket as claimed in claim 1, wherein: the three-dimensional laser imaging device in the S1 is an OKIO-400 type photographic raster three-dimensional scanner.
3. The laser cladding repair method for the double-row sprocket as claimed in claim 2, wherein: and the electronic equipment in the S1 performs data processing through the Geomagic Studio software.
4. The laser cladding repair method for the double-row sprocket as claimed in claim 1, wherein: and S2, the laser equipment comprises a laser, a laser cladding quenching head, a powder feeding nozzle and a control system, wherein the powder feeding nozzle is used for spraying cladding agent to the workpiece to be repaired, and the laser cladding quenching head are matched for carrying out laser cladding on the workpiece to be repaired.
5. The laser cladding repair method for the double-row sprocket as claimed in claim 4, wherein: the laser is a laser LDF4000-30 laser and has the power of 1 kw.
6. The laser cladding repair method for the double-row sprocket as claimed in claim 4, wherein: the powder feeding speed of the powder feeding nozzle is 2.81 g/min.
7. The laser cladding repair method for the double-row sprocket as claimed in claim 4, wherein: the cladding agent is composed of iron powder, carbon powder, silicon powder, chromium powder, cerium oxide powder and boron powder.
8. The laser cladding repair method for the double-row sprocket as claimed in claim 7, wherein: the cladding agent is prepared by mixing 88 wt% of iron powder, 0.2 wt% of carbon powder, 0.8 wt% of silicon powder, 9.8 wt% of chromium powder, 0.2 wt% of cerium oxide powder and 1 wt% of boron powder.
9. The laser cladding repair method for the double-row sprocket as claimed in claim 1, wherein: in S2, the preset path x of the laser beam generated by the laser device and the dwell time y of the workpiece to be repaired satisfy the following relation: y 32.33x + 160.
10. The laser cladding repair method for the double-row sprocket as claimed in claim 1, wherein: and tempering the clad workpiece to be repaired at 200 ℃ for 3h and 500 ℃ for 1.5h in S3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010536992.5A CN111549342A (en) | 2020-06-12 | 2020-06-12 | Laser cladding repair method for double-row chain wheel |
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| CN202010536992.5A CN111549342A (en) | 2020-06-12 | 2020-06-12 | Laser cladding repair method for double-row chain wheel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061885A (en) * | 2021-03-24 | 2021-07-02 | 马鞍山钢铁股份有限公司 | Laser cladding repair method for circular cooler bend |
| CN114310062A (en) * | 2022-01-28 | 2022-04-12 | 桂林电子科技大学 | Device and method for repairing damage of chain wheel set of scraper conveyor |
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| BE1020334A3 (en) * | 2011-12-08 | 2013-08-06 | Layerwise N V | Bone PROTHESE FOR A BONE DEFECT. |
| CN103805813A (en) * | 2013-12-05 | 2014-05-21 | 鞍山煜宸科技有限公司 | Gradient alloy material and method for laser strengthening of copper plate of crystallizer of continuous casting machine |
| CN105598450A (en) * | 2016-02-02 | 2016-05-25 | 陕西天元智能再制造股份有限公司 | Laser three-dimensional profiling repair method for damaged components and parts |
| CN107794527A (en) * | 2017-10-19 | 2018-03-13 | 江苏祥和电子科技有限公司 | The reproducing method of high-strength die steel |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BE1020334A3 (en) * | 2011-12-08 | 2013-08-06 | Layerwise N V | Bone PROTHESE FOR A BONE DEFECT. |
| CN103805813A (en) * | 2013-12-05 | 2014-05-21 | 鞍山煜宸科技有限公司 | Gradient alloy material and method for laser strengthening of copper plate of crystallizer of continuous casting machine |
| CN105598450A (en) * | 2016-02-02 | 2016-05-25 | 陕西天元智能再制造股份有限公司 | Laser three-dimensional profiling repair method for damaged components and parts |
| CN107794527A (en) * | 2017-10-19 | 2018-03-13 | 江苏祥和电子科技有限公司 | The reproducing method of high-strength die steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061885A (en) * | 2021-03-24 | 2021-07-02 | 马鞍山钢铁股份有限公司 | Laser cladding repair method for circular cooler bend |
| CN114310062A (en) * | 2022-01-28 | 2022-04-12 | 桂林电子科技大学 | Device and method for repairing damage of chain wheel set of scraper conveyor |
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Application publication date: 20200818 |
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