CN113802117A - Laser cladding repair method for inner hole of shaft sleeve at roll end of rolling mill and composite device for laser cladding - Google Patents
Laser cladding repair method for inner hole of shaft sleeve at roll end of rolling mill and composite device for laser cladding Download PDFInfo
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- CN113802117A CN113802117A CN202111128310.8A CN202111128310A CN113802117A CN 113802117 A CN113802117 A CN 113802117A CN 202111128310 A CN202111128310 A CN 202111128310A CN 113802117 A CN113802117 A CN 113802117A
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- 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
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Abstract
The invention discloses a laser cladding repair method for an inner hole of a shaft sleeve at a roller end of a rolling mill, which comprises the following steps: disassembling a shaft sleeve assembly → cleaning the surface of the shaft sleeve → detecting components → performing pre-sequence heat treatment → layering cladding → performing post-sequence heat treatment → machining → inspecting and detecting defects → delivering qualified products. Wherein, the heat treatment before the step IV: preheating before cladding can be furnace entering heating and heating by a heating belt; or the heating in the furnace and the heating by the induction device are carried out; or heating by induction means alone; step sixthly, heat treatment: the induction heating method may be induction heating or other heating methods. The laser cladding repairing method has the advantages that the cladding layer with high wear resistance, high strength and high bonding force is cladded on the surface of the inner hole of the roller end shaft, so that the service life of the roller end shaft sleeve is prolonged.
Description
Technical Field
The invention relates to the field of machining, in particular to a method and a device for repairing an inner hole of a shaft sleeve at a roller end of a rolling mill.
Background
The rolling mill roll end shaft sleeve is an important connecting piece on a steel hot rolling production line, and the main function of the rolling mill roll end shaft sleeve is to connect a working roll and transmit motor power to the working roll, so that the upper working roll and the lower working roll rotate, and further, the steel strip is continuously rolled. The flat surface of the shaft sleeve at the roller end of the rolling mill can be repeatedly extruded by impact load in the steel rolling process, and meanwhile, axial fretting friction exists between the working roller and the shaft sleeve at the roller end of the rolling mill, so that the shaft sleeve at the roller end of the rolling mill is quickly abraded, and the service life is short.
For a shaft sleeve at the end of a failed rolling mill roller, the traditional repairing method is changed into scale utilization, repair welding repair and laser cladding repair, and the method has the following problems: firstly, the utilization of the old part for changing the size is limited by the original design structure, size and material performance of the part, and the feasibility is poor; secondly, the bonding force between the welding cladding layer and the part substrate is weak, the heat input amount is large, the stress strain is large, and the cladding volume is large, so that cracking and deformation are caused; thirdly, the existing laser cladding repair method comprises the following steps: (1) a carbon dioxide laser or a fiber laser is generally selected, a laser beam is a Gaussian wave, and the energy distribution of light spots is uneven, so that the quality consistency of a cladding layer is not facilitated; (2) the cladding layer has a single structure, and the bonding force between the cladding layer and the substrate, the fracture toughness of the repaired part, the processability of the repaired part and the like are poor; (3) preheating and post-heat treatment are carried out in a heating furnace and heating belt mode, the defects of large heat loss and rapid temperature drop exist, the temperature of parts is reduced to be below the required preheating temperature range after cladding processing for a period of time, and the operation is required to be stopped for heating and temperature compensation; the temperature rise is slow, and the detection accuracy is poor; (4) by adopting a point heat source input mode, the contradiction that the power density capability, the processing efficiency and the cladding layer quality are difficult to be considered exists, and the specific analysis is as follows: according to the formula of specific energy Es: when the scanning speed and the spot diameter are fixed, the dilution rate of the cladding layer is increased along with the increase of the laser beam power, and the depth of the cladding layer is gradually increased; when the depth of the cladding layer reaches the limit, the incident laser energy exceeds the heat conduction capability of the material, and the thickness of the cladding layer cannot be increased continuously along with the increase of the incident power, the power density of the cladding area is increased continuously along with the increase of the incident laser power, and the liquid metal of the molten pool begins to vaporize; the metal steam above the laser beam irradiation molten pool forms plasma gas mass, plasma shields laser beam energy in the cladding process to cause unstable laser beam input, convection of the irradiation zone molten pool is violent and turbulent, and the phenomena of deformation, cracking and inclusion of a cladding layer are intensified; the larger the laser power exceeding the process requirement is, the more the metal quantity of the spot as the melting part of the point heat source is, and the larger the probability of generating the defects of the melting layer is; however, the laser power is too small, only the surface cladding layer is melted, the substrate is difficult to melt, local unfused exists on the surface of the cladding layer at the moment, the metallurgical bonding is poor, and the cladding purpose cannot be achieved; therefore, when the laser spot is input in a pure point shape, the substrate is difficult to melt due to low power, and the cladding purpose cannot be achieved, but the probability of cladding layer defects is increased due to high power.
Disclosure of Invention
The invention aims to solve the problem of providing a laser cladding repair method for an inner hole of a roll end shaft sleeve of a rolling mill, which is characterized in that a cladding layer with high wear resistance, high strength and high bonding force is fused on the surface of the inner hole of the roll end shaft, so that the service life of the roll end shaft sleeve is prolonged.
The invention relates to a laser cladding repair method of an inner hole of a shaft sleeve at a roller end of a rolling mill, which comprises the following specific steps:
disassembling a shaft sleeve assembly: the components are disassembled in sequence, so that parts are prevented from being damaged and are stored for later use;
processing a shaft sleeve working surface: cleaning a shaft sleeve at the roller end of the rolling mill to remove oil stains and rust; processing and removing a fatigue layer of an inner hole of a working surface to be repaired of the shaft sleeve, removing local defects, removing the layer with the thickness of 3-5mm, and carrying out 100% PT flaw detection on the working surface; and (4) determining whether the failure layer of the working surface is removed or not by using nondestructive testing flaw detection and surface hardness detection.
Component detection and determination of the repair material: analyzing chemical components of the shaft sleeve by adopting a mobile spectrometer, and selecting alloy materials for cladding by combining matrix materials and technical requirements;
fourthly, pre-sequence heat treatment: annealing the roller end shaft sleeve in a heat treatment furnace; preheating the shaft sleeve at the roller end before cladding, wherein the preheating temperature and the heat preservation time are determined according to the chemical composition and the wall thickness of the shaft sleeve at the roller end;
cladding the working surface: carrying out laser cladding on the inner hole of the shaft sleeve by using an alloy material;
sixthly, carrying out heat treatment: heating the shaft sleeve at the roller end to a preheating required temperature, and carrying out heat preservation and slow cooling to room temperature;
and (c) machining: machining the working surface of the shaft sleeve at the roller end to meet the relevant requirements of a drawing;
and eighthly, inspection and flaw detection: and (5) inspecting the relevant size of the shaft sleeve, and carrying out nondestructive inspection on the working surface.
Ninthly, delivery of qualified products: detecting unqualified reworking and detecting qualified product delivery.
Further, pre-heat treatment of step (iv): preheating before cladding can be furnace entering heating and heating by a heating belt; or the heating in the furnace and the heating by the induction device are carried out; or heating by induction means alone; step sixthly, heat treatment: the induction heating method may be induction heating or other heating methods.
Further, cladding the working surface: the alloy materials have the following three types: the iron-based alloy soft powder is made of a matrix material and has performance close to that of a matrix material, the granularity is 100-200 meshes, and the mass percentage is as follows: 0.05 percent of C, 18.0 percent of Cr, 0.7 percent of B, 0.9 to 1.0 percent of Si, 10.0 to 12.0 percent of Ni, 2.5 to 3.0 percent of Mo, 0.5 percent of Mn and the balance of Fe; secondly, the material and the performance of the iron-based alloy transition powder between the matrix and the selected reinforced material have the granularity of 100-200 meshes, and the mass percentage is as follows: 0.08 percent of C, 18.0 percent of Cr, 0.7 to 0.8 percent of B, 0.9 to 1.0 percent of Si, 5.0 percent of Ni, 2.0 percent of Mo, 0.5 percent of Mn and the balance of Fe; thirdly, the particle size of the reinforced iron-based alloy hard powder is 100-200 meshes, and the mass percentage is as follows: 0.18-0.2% of C, 15.0-18.0% of Cr, 0.9-1.0% of Si, 2.0% of Ni, 2.0% of Mo, 0.1% of Mn and the balance of Fe.
Further, cladding the working surface: the combination mode of the alloy materials is as follows: when the shaft sleeve substrate is low in hardness, the alloy material is soft powder, and the cladding layer is a layer; secondly, when the shaft sleeve requires high hardness: 1. the alloy material is soft powder repair + transition powder, the cladding layer is two layers, namely a layer of transition powder is cladded outside the soft powder; 2. the alloy material is soft powder repair, transition powder and hard powder reinforcement, and the cladding layer is three layers, namely a layer of hard powder is cladded outside the transition powder; 3. the alloy material is soft powder repair, transition powder, hard powder reinforcement and transition powder, and the cladding layer is four layers, namely, one layer of transition powder is cladded outside the hard powder.
Further, cladding the working surface: cladding by using a semiconductor laser, wherein the output mode of a light beam of the semiconductor laser is flat top light; and adopting induction heating as a composite heat source for laser cladding.
The invention relates to a composite device for laser cladding, which comprises a laser cladding optical head and an induction heating device which are connected with each other; the laser cladding optical head comprises a laser mirror seat assembly, a powder feeding nozzle, a laser channel and an alloy powder channel, wherein the laser mirror seat assembly comprises a collimating mirror seat, a reflecting mirror seat and a protective mirror seat; the laser channel and the alloy powder channel reach the powder feeding nozzle through the laser lens seat component; the induction heating device comprises an adapter plate, an induction coil wire with water cooling, an infrared temperature detector, a hollow water-cooling copper pipe and an induction heating coil; the adapter plate is L-shaped, a bolt connecting hole is formed in a transverse plate of the adapter plate, and a vertical plate of the adapter plate is hollow; the hollow water-cooling copper pipe is U-shaped, and an opening at the upper part of the hollow water-cooling copper pipe is communicated with the lower plane of the riser of the adapter plate and is insulated at intervals by using a ceramic ring; the induction heating coil is connected with the lower section of the hollow water-cooling copper pipe; two induction coil wires are arranged on the left and right sides and penetrate through the unthreaded holes in the transverse plate of the adapter plate and then are connected with threaded holes in the vertical plate of the adapter plate; the infrared temperature detector is connected to the lower plane of the transverse plate of the adapter plate, and forms an angle of 45 degrees with the adapter plate, and the detection direction points to the middle area of the induction heating coil; the adapter plate is connected below the collimating mirror base through a bolt connecting hole; the induction heating coil is positioned right below the powder feeding nozzle.
Furthermore, the induction heating device also comprises a soft iron magnetizer and an insulating and heat-insulating ceramic sheet; the induction heating coil is rectangular, soft iron magnetizers are wrapped on three sides of the induction heating coil, and an insulating heat-insulating ceramic sheet is covered on one side facing the laser cladding optical head; the soft iron magnetizer is powder metallurgy ferrite; the induction heating coil is a copper pipe, the cross section of the copper pipe is rectangular, and the inside of the copper pipe is hollow.
Furthermore, the laser channel comprises a laser fiber, a collimating mirror, a focusing reflector and a full-transmission protective mirror; an inverted L-shaped reflecting cavity is arranged in the reflecting mirror seat, one end of the reflecting mirror seat is horizontally provided with an opening at the laser beam input window, the other end of the reflecting mirror seat is vertically provided with an opening below the reflecting mirror seat, and the focusing reflecting mirror is fixed at the corner of the L-shaped reflecting cavity through the reflecting mirror base seat; the collimating lens is arranged in a straight cavity in the collimating lens base, an opening at one end of the straight cavity is communicated with the laser beam input window, an opening at the other end of the straight cavity is communicated with the laser fiber, and the laser fiber is connected with a fiber connection joint fixed on the side surface of the collimating lens base; the full-transparent protective lens is arranged in the protective lens seat and is positioned below the vertical opening of the reflecting cavity; the alloy powder channel comprises a horizontal channel on the collimating mirror seat and a vertical channel on the reflecting mirror seat; the horizontal channel comprises an alloy powder input end and an alloy powder reflector seat end; the vertical channel comprises an alloy powder input end, an alloy powder shunting ring groove and three alloy powder inlet ends.
Furthermore, the composite device for laser cladding also comprises an optical head protective gas channel, an optical head circulating cooling water channel and an induction coil wire channel; the optical head protection air passage comprises a horizontal channel on the collimating mirror seat and a vertical channel on the reflecting mirror seat; the horizontal channel comprises a shielding gas input end and a shielding gas reflector base end; the vertical channel comprises a protective gas input end and a protective gas output end; the optical head circulating cooling water channel comprises a horizontal water inlet channel and a horizontal water outlet channel on the collimating mirror seat, and a water inlet channel and a water outlet channel on the reflecting mirror seat; the horizontal water inlet channel comprises a cooling water input end and a cooling water input reflector seat end, and the horizontal water outlet channel comprises a cooling water reflector seat output end and a cooling water output end; the water inlet channel on the reflector seat comprises a reflector seat cooling water input end, a reflector cooling water input end, a cooling water output end and a powder feeding nozzle cooling water input end, and the water outlet channel comprises a powder feeding nozzle cooling water output end and a reflector seat cooling water output end; the induction coil wire channel is arranged on the collimating lens base and comprises an induction coil wire input end, an induction coil wire heating head end and an induction coil wire output end.
Furthermore, the composite device for laser cladding also comprises a support rod, wherein one end of the support rod is connected to the side surface of the collimating lens seat, and the other end of the support rod is provided with a support rod switching base; the bracing piece is bilayer structure, and its inlayer coats laser fiber, sets up induction coil wire, shaved head cooling water pipeline, shaved head protection gas pipeline, alloy powder passageway between the inlayer and the inlayer, and the terminal surface uses prefabricated sealing ring cooperation O type circle to realize sealing.
The laser cladding repair method for the inner hole of the shaft sleeve at the roller end of the rolling mill has the beneficial effects that: compared with the utilization of changed scales, the cladding repair strengthening scheme can keep consistent with the original design structure and size, has the same service conditions, and does not need to change matched parts; compared with surfacing repair, the cladding repair strengthening scheme has the advantages of small heat input, concentrated heat source, strong bonding force between the cladding layer and the substrate and strong repairability of parts; thirdly, compared with the existing laser cladding: 1. the design of the cladding layer material is optimized, the performance and function gradient distribution is realized, the material and processing cost are saved, and the quality of the cladding layer is improved; 2. the composite device for laser cladding, which is combined by the induction heating device and the optical head, is used during laser cladding, so that an input heat source during laser cladding is combined by point input and planar input, the heat input of a laser beam required during cladding repair is small, the planar heating source of the induction heating device is concentrated, the local heating of a processing area of a part is realized, the preheating temperature is improved, the temperature gradient and the solidification speed are reduced, the thermal stress of a processing part is reduced, the stress of a cladding layer is released due to the reduction of the solidification speed, the liquid flow of a molten pool is more sufficient, the possibility of solidification crack generation is reduced, the bonding force between the cladding layer and a substrate is strong, the performance of the cladding layer is ensured, and the quality of the cladding layer is improved; 3. the induction heating device in the composite device for laser cladding is used in the preheating and post-heat treatment stages, so that the local temperature of a processing part can be increased, the temperature gradient and the stress strain unevenness of the processing part can be reduced, the more stable processing quality on the premise of the same processing speed can be realized, the cladding layer structure can be improved, and the cladding layer quality can be improved; 4. the semiconductor laser outputs horizontal mode flat top light, the energy distribution of a molten pool is more uniform, the dilution rate is low, the performance consistency of a transition layer is high, and a cladding heat affected zone is small. In a word, the laser cladding repair method and the laser cladding composite device are designed and arranged in a targeted manner according to the characteristics of the shaft sleeve of the part to be clad, so that the functional gradient performance of the cladding layer is realized, the selective heating of the region of the workpiece to be clad is ensured, the heat input of the region of the workpiece to be clad meets the process requirement, and the processing speed is higher on the premise of ensuring the cladding quality.
Drawings
FIG. 1 is a schematic structural diagram of a laser cladding compound device according to the present invention;
FIG. 2 is a schematic structural diagram of a second laser cladding apparatus according to the present invention (with the support rod removed);
FIG. 3 is a perspective view of a hybrid apparatus for laser cladding of the present invention;
FIG. 4 is a schematic view of the connection surface of the collimator lens holder and the support rod;
FIG. 5 is a schematic view of a collimator lens mount;
FIG. 6 is a first schematic view of the reflector base, the protective lens base, and the powder feeding nozzle;
FIG. 7 is a second schematic view of the reflector base, the protective lens base and the powder feeding nozzle;
FIG. 8 is a third schematic view of the reflector base, the protective lens base and the powder feeding nozzle;
FIG. 9 is a perspective view of the reflector base, the protective mirror base, and the powder feeding nozzle;
FIG. 10 is a schematic view of a support bar of the induction heating unit;
figure 11 is a schematic view of a support bar.
Detailed Description
The invention relates to a laser cladding repair method of an inner hole of a shaft sleeve at a roller end of a rolling mill, which comprises the following specific steps:
disassembling a shaft sleeve assembly: the components are disassembled in sequence, so that parts are prevented from being damaged and are stored for later use;
processing a shaft sleeve working surface: cleaning a shaft sleeve at the roller end of the rolling mill to remove oil stains and rust; processing and removing a fatigue layer of an inner hole of a working surface to be repaired of the shaft sleeve, removing local defects, removing the layer with the thickness of 3-5mm, and carrying out 100% PT flaw detection on the working surface; and (4) determining whether the failure layer of the working surface is removed or not by using nondestructive testing flaw detection and surface hardness detection.
Component detection and determination of the repair material: analyzing chemical components of the shaft sleeve by adopting a mobile spectrometer, and selecting alloy materials for cladding by combining matrix materials and technical requirements;
fourthly, pre-sequence heat treatment: annealing the roller end shaft sleeve in a heat treatment furnace; preheating the shaft sleeve at the roller end before cladding, wherein the preheating temperature and the heat preservation time are determined according to the chemical composition and the wall thickness of the shaft sleeve at the roller end;
cladding the working surface: carrying out laser cladding on the inner hole of the shaft sleeve by using an alloy material;
sixthly, carrying out heat treatment: heating the shaft sleeve at the roller end to a preheating required temperature, and carrying out heat preservation and slow cooling to room temperature;
and (c) machining: machining the working surface of the shaft sleeve at the roller end to meet the relevant requirements of a drawing;
and eighthly, inspection and flaw detection: and (5) inspecting the relevant size of the shaft sleeve, and carrying out nondestructive inspection on the working surface.
Ninthly, delivery of qualified products: detecting unqualified reworking and detecting qualified product delivery.
Wherein, the heat treatment before the step IV: preheating before cladding can be furnace entering heating and heating by a heating belt; or the heating in the furnace and the heating by the induction device are carried out; or heating by induction means alone; step sixthly, heat treatment: the induction heating method may be induction heating or other heating methods. The induction heating mode has wide adjustable power range, can set different heating temperatures and heating rates, and can realize various different heat treatment methods. When the pre-sequence heat treatment is a combined heating mode of furnace entering heating and induction heating, the heat input can be controlled in real time, and the region to be processed of the part is kept in a stable preheating temperature range.
Wherein, the working surface is cladded: the alloy materials for cladding are three types: the iron-based alloy soft powder is made of a matrix material and has performance close to that of a matrix material, the granularity is 100-200 meshes, and the mass percentage is as follows: 0.05 percent of C, 18.0 percent of Cr, 0.7 percent of B, 0.9 to 1.0 percent of Si, 10.0 to 12.0 percent of Ni, 2.5 to 3.0 percent of Mo, 0.5 percent of Mn and the balance of Fe; secondly, the material and the performance of the iron-based alloy transition powder between the matrix and the selected reinforced material have the granularity of 100-200 meshes, and the mass percentage is as follows: 0.08 percent of C, 18.0 percent of Cr, 0.7 to 0.8 percent of B, 0.9 to 1.0 percent of Si, 5.0 percent of Ni, 2.0 percent of Mo, 0.5 percent of Mn and the balance of Fe; thirdly, the particle size of the reinforced iron-based alloy hard powder is 100-200 meshes, and the mass percentage is as follows: 0.18-0.2% of C, 15.0-18.0% of Cr, 0.9-1.0% of Si, 2.0% of Ni, 2.0% of Mo, 0.1% of Mn and the balance of Fe.
The shaft sleeve cladding layer repairing material and the cladding layer structure can be reasonably arranged according to the technical requirements and working conditions of the shaft sleeve: when the shaft sleeve substrate is low in hardness, the alloy material is soft powder, and the cladding layer is a layer; secondly, when the shaft sleeve requires high hardness: 1. the alloy material is soft powder repair + transition powder, the cladding layer is two layers, namely a layer of transition powder is cladded outside the soft powder; 2. the alloy material is soft powder repair, transition powder and hard powder reinforcement, and the cladding layer is three layers, namely a layer of hard powder is cladded outside the transition powder; 3. the alloy material is soft powder repair, transition powder, hard powder reinforcement and transition powder, and the cladding layer is four layers, namely, one layer of transition powder is cladded outside the hard powder. The requirement of high hardness of the shaft sleeve means that the working part of the shaft sleeve, namely the inner hole cladding layer, is strengthened by high hardness.
Wherein, the soft powder cladding repairs local depressions and corner collapse, and the cladding processing is carried out until the working surface of the shaft sleeve is regular and flat; the strength and the toughness of the transition powder are suitable for bearing the surface layer strengthening layer; the high-hardness and wear-resistant reinforced material cladding surface reinforcing layer is selected according to the use working condition and technical requirements; the transition powder with good toughness and moderate strength and hardness can be used as a cladding processing allowance layer.
According to the principle that the strength and the hardness are gradually increased from a non-working surface to a working surface until the required performance is achieved, the invention designs and processes the gradient material cladding layer to realize the gradient performance and the gradient function of the working part of the part: when the cladding layer is multilayer, the soft powder is coated to the hard powder, and the elements (composition, structure and the like) of the material are distributed in a trapezoidal shape continuously changing from one side to the other side along the thickness direction, so that the property and the function of the material are also changed in a gradient manner. Therefore, the functionally graded material of the invention enables each component in the composite material to exert respective performance characteristics, enables the material to have high strength and high hardness, and simultaneously greatly reduces stress, thereby enabling the material performance to be obviously superior to a cladding layer made of a single material.
Wherein, the working surface is cladded: and cladding by using a semiconductor laser, wherein the output mode of the light beam of the semiconductor laser is flat-top light. The energy distribution in the beam cross section of the flat top light is uniform, and the fusion quality of materials in light spots is consistent.
Wherein, the working surface is cladded: and adopting induction heating as a composite heat source for laser cladding. The induction heating is a surface-shaped input heat source, and is combined with laser point-shaped input, so that the local temperature of a cladding part can be improved, the temperature gradient of the cladding part is reduced, the thermal stress of the cladding part is reduced, the cladding quality is improved, and the performance of the cladding layer is ensured.
Example 1
The material of the shaft sleeve at the roller end of the rolling mill is 42CrMo, the designed surface hardness is HB269-302, the abrasion of the working surface is out of tolerance after 1 year of use, the material with similar use performance is required to be repaired, and the original size and performance indexes are recovered.
Disassembling a shaft sleeve assembly: the components are disassembled in sequence, so that parts are prevented from being damaged and are stored for later use;
secondly, cleaning the surface of the shaft sleeve: and cleaning the surface of the shaft sleeve to remove oil stains and rust. Processing and removing a fatigue layer and local defects of a to-be-repaired working surface of the shaft sleeve, removing the layer with the thickness of 3-5mm, and carrying out 100% PT flaw detection on the working surface;
ingredient detection: a moving spectrometer is adopted to analyze chemical components of the shaft sleeve, and a repairing alloy material is selected and matched by combining the matrix material and the technical requirement;
fourthly, pre-sequence heat treatment: annealing the roller end shaft sleeve to be repaired in a heat treatment furnace at the heating rate of less than 100 ℃/h at the annealing temperature of 550-600 ℃ for 4h, and slowly cooling to room temperature along with the furnace; preheating before cladding at 350-400 ℃, wrapping a heating belt and asbestos cloth on the excircle of the part during cladding, measuring temperature in real time, increasing and decreasing the power of the heating belt, and keeping the preheating temperature balanced and stable;
cladding the working surface: the cladding alloy material adopts soft powder, a semiconductor laser with the working wavelength of 900-; selecting an optical fiber with the core diameter of 1000 mu m to transmit laser beams; selecting an inner hole cladding optical head for cladding; the spot size is 19 x 1.5mm, the laser power is 5.0KW-5.5KW, the percentage of energy consumption of induction heating is 10% -100%, the scanning speed is 400-;
sixthly, carrying out heat treatment: heating the shaft sleeve to a preheating temperature, and keeping the temperature and slowly cooling to room temperature;
and (c) machining: machining a working surface of the shaft sleeve;
and eighthly, inspection and flaw detection: and (5) inspecting the relevant size of the shaft sleeve, carrying out nondestructive inspection on the working surface, and carrying out inspection, assembly and delivery.
Ninthly, delivery of qualified products: detecting unqualified reworking and detecting qualified product delivery.
Example 2
The material of the shaft sleeve at the roller end of the rolling mill is 25Cr2Ni4MoV, the surface hardness is HRC42-45, the abrasion of the working surface is out of tolerance after 1 year of use, the material with similar use performance is required to be repaired, and the original size and performance index are recovered.
Wherein, the working surface is cladded: the cladding alloy material selects soft powder and transition powder; selecting a semiconductor laser with the working wavelength of 900-; selecting an optical fiber with the core diameter of 1000 mu m to transmit laser beams; performing induction heating and cladding by using a laser cladding composite device; technological parameters during cladding are as follows: the spot size phi is 5mm, the laser power is 2.2KW-2.8KW, the percentage of energy consumption of induction heating is 10% -100%, the scanning speed is 600-. The rest steps are the same as above.
Example 3
The material of the shaft sleeve at the roller end of the rolling mill is 42CrMo, the designed surface hardness is HRC52-58, the abrasion of the working surface is out of tolerance after 1 year of use, the material with similar use performance is required to be repaired, and the original size and performance index are recovered.
Wherein, the heat treatment before the step IV: annealing the roller end shaft sleeve to be repaired in a heat treatment furnace at the heating rate of less than 100 ℃/h at the annealing temperature of 550-600 ℃ for 4h, and slowly cooling to room temperature along with the furnace; preheating before cladding at 350-400 ℃, and heating by using an induction heating device in the laser cladding composite device. Wherein, the working surface is cladded: the alloy material is soft powder, transition powder and strengthening powder; selecting a semiconductor laser with the working wavelength of 900-; selecting an optical fiber with the core diameter of 1000 mu m to transmit laser beams; induction heating and cladding were performed using a laser cladding complex apparatus. Wherein, the heat treatment after the step of the sixth step: heating was performed using an induction heating apparatus in the laser cladding composite apparatus. The induction heater provides preheating and post-heat treatment, can improve the local temperature of a processing part, reduces the temperature gradient and stress strain unevenness of the part processing part, realizes more stable processing quality on the premise of the same processing speed, optimizes the local processing manufacturability of a cladding processing area, and can improve the processing efficiency and the product quality. The rest steps are the same as above.
The laser cladding repair method for the inner hole of the shaft sleeve at the roller end of the rolling mill has the beneficial effects that: compared with the utilization of changed scales, the cladding repair strengthening scheme can keep consistent with the original design structure and size, has the same service conditions, and does not need to change matched parts; compared with surfacing repair, the cladding repair strengthening scheme has the advantages of small heat input, concentrated heat source, strong bonding force between the cladding layer and the substrate and strong repairability of parts; thirdly, comparing with the existing laser cladding: 1. the semiconductor laser outputs horizontal mode flat top light, so that the energy distribution of a molten pool is more uniform, the dilution rate is low, the performance consistency of a transition layer is high, and a cladding heat affected zone is small; 2. the induction heating of the composite device for laser cladding is a planar heat source, the temperature rise is high, the temperature consistency is good, the temperature gradient and the thermal stress are reduced, namely the local heating of a cladding area is fast, the cladding layer quality is good, and the cladding efficiency is high; 3. the design of the cladding layer material is optimized, the performance and function gradient distribution is realized, the material and processing cost are saved, and the quality of the cladding layer is improved; 4. the induction heating device in the laser cladding composite device is used in the preheating and post-heat treatment stages, so that the local temperature of a processing part can be increased, the temperature gradient and stress strain unevenness of the part processing part are reduced, more stable processing quality is realized on the premise of the same processing speed, the cladding layer structure is improved, and the cladding layer quality is improved.
Example 4
As can be seen from fig. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, the present invention provides a hybrid apparatus for laser cladding, which includes a laser cladding optical head and an induction heating apparatus 6 connected to each other; the laser cladding optical head comprises a laser mirror base assembly, a powder feeding nozzle 5, a laser channel and an alloy powder channel, wherein the laser mirror base assembly comprises a collimating mirror base 3, a reflecting mirror base 4 and a protective mirror base 4-3, the collimating mirror base 3 is connected to the side surface of the reflecting mirror base 4, the protective mirror base 4-3 is connected to the lower surface of the reflecting mirror base 4, and the powder feeding nozzle 5 is connected to the lower surface of the protective mirror base 4-3 through threads; the laser channel and the alloy powder channel reach the powder feeding nozzle 5 through the laser lens seat component; the induction heating device 6 comprises an adapter plate 6-1, an induction coil wire 6-3 with water cooling, an infrared temperature detector 6-4, a hollow water-cooling copper pipe 6-5 and an induction heating coil 6-6; the adapter plate 6-1 is L-shaped, a bolt connecting hole 6-2 is formed in a transverse plate of the adapter plate, and a vertical plate of the adapter plate is hollow; the hollow water-cooling copper pipe 6-5 is U-shaped, the upper opening of the hollow water-cooling copper pipe is communicated with the lower plane of the riser of the adapter plate 6-1 and is insulated at intervals by using a ceramic ring; the induction heating coil 6-6 is connected with the lower section of the hollow water-cooling copper pipe 6-5; two induction coil wires 6-3 are arranged left and right and penetrate through the unthreaded hole in the transverse plate of the adapter plate 6-1 to be connected with the threaded hole in the vertical plate of the adapter plate 6-1; the infrared temperature detector 6-4 is connected to the lower plane of the transverse plate of the adapter plate 6-1, forms an angle of 45 degrees with the adapter plate 6-1, and the detection direction points to the middle area of the induction heating coil 6-6; the adapter plate 6-1 is connected below the collimating mirror base 3 through a bolt connecting hole 6-2; the induction heating coil 6-6 is located immediately below the powder feeding nozzle 5.
The induction heating coil 6 is hollow inside, and external cooling water cools the induction heating coil 6 through the hollow water-cooling copper pipe 5, so that overheating and burning loss of the coil are prevented.
Wherein, the induction heating device also comprises 6-7 parts of a soft iron magnetizer and 6-8 parts of an insulating and heat-insulating ceramic sheet; the induction heating coil 6-6 is rectangular, soft iron magnetizers 6-7 are wrapped on three edges of the induction heating coil 6-6, and an insulating heat-insulating ceramic plate 6-8 is covered on one edge facing the laser cladding optical head.
Wherein, the soft iron magnetizer 6-7 uses powder metallurgy ferrite; the induction heating coil 6-6 is a copper pipe, and the section of the copper pipe is rectangular.
The laser cladding optical head and the induction heating device in the composite device for laser cladding are of a split structure, and the laser cladding optical head and the induction heating device can be used independently and can also be connected into a whole for use:
when the induction heating device and the laser cladding head are used independently, the laser cladding head can be used during laser cladding, and the induction heating device can be used for heating workpieces during preheating before cladding and heat treatment after cladding; 1. when the induction heating controller works, a wire of the induction coil with water cooling transmits power to the induction heating coil, so that a magnetic field of a part positioned in an induction heating coil area is subjected to induction heating, the soft iron magnetizer can enable magnetic lines of force of a rectangular plane coil to pass through the direction needing to be heated, a rectangular directional heating field surrounding a cladding processing area is realized, the preheating temperature of the processing area is increased, the temperature gradient and the solidification speed are reduced, the thermal stress of a processing part is reduced, the stress of a cladding layer is released due to the reduction of the solidification speed, the liquid flow of a molten pool is more sufficient, the probability of the generation of solidification cracks is reduced, the quality of the cladding layer is improved, and the performance of the cladding layer is ensured; 2. compared with a round copper pipe, an induction coil of the copper pipe with the rectangular cross section can be closer to a heating workpiece, the distance between the rectangular coil and the workpiece can be smaller than the gap between the rectangular coil and the workpiece, and the induction coil has higher efficiency, smaller energy consumption and better heating consistency when parts with the same size are heated; 3. the induction heating can control heat input in real time, so that the rapid temperature drop caused by large heat loss is prevented, the region to be repaired of the part can be kept in a stable preheating temperature range, and the requirement of continuous processing of the part is met; 4. the stress of the cladding layer is reduced through preheating, the defects of air holes, cracks and the like are reduced through post heat treatment, the homogeneity of the cladding layer is improved, and the molding quality of the cladding layer is improved.
When the two are combined for use, the adapter plate can be connected with the collimating lens base through the bolt connecting hole, the adjustment of the upper position and the lower position along the axis direction of the laser beam between the induction heating device and the laser cladding optical head can be realized by combining the distance nut, and the composite device is used during the laser cladding and has the advantages that: 1. the input heat source is changed from the existing single point input into the point input and the surface input in the laser cladding process, so that the input power requirement of the laser is reduced, the heat source is concentrated, the bonding force of the cladding layer and the substrate is strong, and the repair effect of parts is good; 2. the insulating heat-insulating ceramic chip can shield magnetic induction lines facing the laser cladding optical head direction and block heat conduction, so that the laser cladding optical head is effectively protected from abnormal temperature rise and heating, and the service life of the laser cladding optical head is prolonged; 3. the combination of the induction heating device and the laser cladding optical head reduces the operation space required for cladding in the inner hole of the part, and simultaneously integrates cladding and heating into a whole, thereby greatly improving the cladding efficiency and quality; 4. the induction heating device detects the temperature of a part cladding area below the laser cladding optical head in real time, feeds back to the induction heating controller, and the induction heating controller automatically regulates and controls voltage and current to realize stable heating and temperature control of the part cladding area; 5. the water-cooled induction coil wire of area transmits electricity to induction heating coil, thereby make the part magnetic field induction heating that is located the induction heating coil zone territory, soft iron magnetizer can make the magnetic line of force of rectangle plane coil pass through the direction that needs the heating, realize the orientation, the heating part substrate of constant temperature, thereby can improve the preheating temperature in processing zone, reduce temperature gradient and solidification speed, reduce processing position thermal stress, the reduction of solidification speed can make cladding layer stress obtain the release, molten bath liquid flow is more abundant, thereby the probability that the solidification crack produced has been reduced, improve the cladding layer quality, the performance of cladding layer has been guaranteed.
Example 5
The invention relates to a composite device for laser cladding: the laser channel comprises a laser fiber 1, a collimating mirror 3-13, a focusing reflector 4-15 and a total-transmission protective mirror 4-16; an inverted L-shaped reflecting cavity is arranged in the reflecting mirror seat 4, one end of the reflecting mirror seat is horizontally opened at the laser beam input window 4-1, the other end of the reflecting mirror seat is vertically opened below the reflecting mirror seat 4, and the focusing reflecting mirror 4-15 is fixed at the folding angle of the L-shaped reflecting cavity through a reflecting mirror base 4-2; the collimating lens 3-13 is arranged in a straight cavity in the collimating lens base 3, an opening at one end of the straight cavity is communicated with the laser beam input window 4-1, an opening at the other end of the straight cavity is communicated with the laser fiber 1, and the laser fiber 1 is connected with the fiber connecting joint 2 fixed on the side surface of the collimating lens base 3; the full-transparent protective lens 4-16 is arranged in the protective lens seat 4-3 and is positioned below the vertical opening of the reflecting cavity; the alloy powder channel comprises a horizontal channel on the collimating mirror base 3 and a vertical channel on the reflecting mirror base 4; the horizontal channel comprises an alloy powder input end 3-4 and an alloy powder reflector seat end 3-10; the vertical channel comprises an alloy powder input end 4-11, an alloy powder shunting ring groove 4-12 and three alloy powder inlet ends 4-14.
During laser cladding, a laser beam of the laser fiber 1 passes through the collimating lens 3-13, passes through the laser beam input window 4-1 and irradiates on the focusing reflector 4-14, passes through the full-transparent protective lens 4-16 after being reflected, is emitted from a cavity of the powder feeding nozzle 5, and irradiates on the surface of a part below a laser cladding optical head to form a molten pool; alloy powder for cladding is ejected from a cavity in the powder feeding nozzle 5 through an alloy powder input end 3-4, an alloy powder reflector seat end 3-10, an alloy powder input end 4-11, an alloy powder shunting ring groove 4-12 and an alloy powder inlet end 4-14, three beams of alloy powder beams are converged at the center of a molten pool, and the molten pool is solidified along with the movement of a laser cladding optical head, so that parts are clad to form a strengthened cladding layer. The part of the alloy powder channel, which is positioned outside the optical head, consists of a copper pipe with the same diameter as the internal channel of the optical head, and the copper pipe of the alloy powder channel is connected with the interface of the optical head by a welding method and ensures sealing.
Example 6
The composite device for laser cladding also comprises an optical head protective gas channel, an optical head circulating cooling water channel and an induction coil wire channel; the optical head protection air passage comprises a horizontal passage on the collimating mirror seat 3 and a vertical passage on the reflecting mirror seat 4; the horizontal channel comprises a protective gas input end 3-3 and a protective gas reflector base end 3-9; the vertical channel comprises a protective gas input end 4-10 and a protective gas output end 4-13; the optical head circulating cooling water channel comprises a horizontal water inlet channel and a horizontal water outlet channel on the collimating mirror seat 3, and a water inlet channel and a water outlet channel on the reflecting mirror seat 4; the horizontal water inlet channel comprises a cooling water input end 3-5 and a cooling water input reflector seat end 3-11, and the horizontal water outlet channel comprises a cooling water reflector seat output end 3-12 and a cooling water output end 3-6; the water inlet channel on the reflector seat 4 comprises a reflector seat cooling water input end 4-4, a reflector cooling water input end 4-5, a cooling water output end 4-6 and a powder feeding nozzle cooling water input end 4-7, and the water outlet channel comprises a powder feeding nozzle cooling water output end 4-8 and a reflector seat cooling water output end 4-9; the induction coil wire channel is arranged on the collimating lens base 3 and comprises an induction coil wire input end 3-1, an induction coil wire heating head end 3-7, an induction coil wire heating head end 3-8 and an induction coil wire output end 3-2.
When in laser cladding, the protection gas of the optical head is ejected from a cavity in the powder feeding nozzle 5 through a protection gas input end 3-3, a protection gas reflector base end 3-9, a protection gas input end 4-10 and a protection gas output end 4-13 to protect the parts during cladding; the laser cladding optical head cooling water pipe passes through a cooling water input end 3-5, a cooling water input reflector seat end 3-11, a reflector seat cooling water input end 4-4, a reflector cooling water input end 4-5, a cooling water output end 4-6, a reflector seat 4-2, a powder feeding nozzle cooling water input end 4-7, a powder feeding nozzle cooling water output end 4-8, a reflector seat cooling water output end 4-9, a cooling water reflector seat output end 3-12 and a cooling water output end 3-6 to form a loop, cooling water flows in the pipeline to cool the laser cladding optical head, the laser cladding optical head is prevented from heating up and heating, and the service life of the laser cladding optical head is prolonged. During laser cladding, one of the induction coil wires 6-3 with water cooling is connected with one end of the induction heating coil 6-6 through the induction coil wire input end 3-1 and the induction coil wire heating head end 3-7, and the other is connected with the other end of the induction heating coil 6-6 through the induction coil wire output end 3-2 and the induction coil wire heating head end 3-8.
The laser cladding optical head comprises an optical head protective gas channel, an optical head cooling circulating water channel and a laser cladding optical head interface, wherein the optical head protective gas channel and the optical head cooling circulating water channel are positioned outside the laser cladding optical head and the optical head cooling circulating water channel are composed of copper pipes with equal diameters, and the copper pipes of the two channels and the optical head interface are connected by a welding method to ensure sealing. The optical head protection gas channel is a one-way output channel. The optical head cooling circulating water channel is a series connection communication channel from an input end to an output end, and the smooth circulation of cooling water is ensured to realize the cooling temperature control function.
Example 7
As can be seen from fig. 11, the laser cladding composite device of the present invention further comprises a support rod 7, wherein one end of the support rod 7 is connected to the side surface of the collimating lens holder 3, and the other end is provided with a support rod adapter base 7-8; the support rod 7 is of a double-layer structure, the inner layer of the support rod is coated with laser fibers, an induction coil wire, an optical head cooling water pipeline, an optical head protective gas pipeline and an alloy powder channel are arranged between the inner layer and the outer layer, and the end face of the support rod is sealed by a prefabricated sealing ring matched with an O-shaped ring.
Specifically, the method comprises the following steps: the support rod 7 is provided with a plurality of horizontal channels, the center of the support rod is provided with a laser fiber channel, and openings at two ends of the support rod are provided with laser fiber mounting holes 7-7; periphery of laser fiber channel: the induction coil wire channel is divided into two channels, the openings at two ends of one channel are the induction coil wire input ends 7-1, the openings at two ends of the other channel are the induction coil wire output ends 7-2, the channel of the optical head cooling water pipeline is divided into two channels, the openings at two ends of one channel are the optical head cooling water input ends 7-5, the openings at two ends of the other channel are the optical head cooling water output ends 7-6, the openings at two ends of the optical head protection gas channel are the optical head protection gas input ends 7-3, and the openings at two ends of the alloy powder channel are the alloy powder input ends 7-4.
The supporting rod 7 is reasonably arranged with laser fibers, induction coil leads, a bare head cooling water pipeline, a bare head protective gas pipeline, an alloy powder channel and the like through a double-layer structure, so that heat insulation and heat preservation are realized, the laser transmission fibers and the pipelines for conveying cooling water, protective gas and cladding alloy powder are protected from being influenced by a high-temperature environment, and stable work and consistent quality of the induction heating composite cladding bare head are ensured.
The laser cladding composite device has the advantages that: firstly, laser, alloy powder, optical head protective gas, cooling water and the like reach a powder feeding nozzle through a laser lens seat assembly, the defect that the external part of the optical head of the existing pipeline is greatly influenced by the environment is overcome, and the laser cladding quality is ensured; secondly, the induction heating device is combined with the laser cladding optical head, so that the input heat source is combined with the point input and the surface input during the laser cladding, the input power requirement of the laser is reduced, the heat source is concentrated, the bonding force between the cladding layer and the substrate is strong, and the quality and the efficiency of the cladding layer are improved; thirdly, the arrangement of the rectangular coil and the soft iron magnetizer realizes the directional heating of the part substrate, avoids the heating and temperature rise of the laser cladding optical head, and prolongs the service life of the laser cladding optical head; and fourthly, guiding magnetic lines of force to pass through the direction needing heating by adopting the coil with the rectangular plane and the soft iron magnetizer, realizing a rectangular directional heating field surrounding the cladding processing area, reducing stress generation of the cladding layer through preheating, reducing defects such as air holes and cracks through post heat treatment, improving homogeneity of the cladding layer, and improving forming quality of the cladding layer. Realizing directional heating of the part base material; and fifthly, detecting the temperature of the part cladding area below the optical head in real time by the induction heating device, feeding back the induction heating controller, and automatically regulating and controlling the voltage and the current by the induction heating controller to realize stable heating and temperature control of the part cladding area.
Claims (10)
1. The laser cladding repairing method of the inner hole of the shaft sleeve at the roller end of the rolling mill comprises the following specific steps:
disassembling a shaft sleeve assembly: the components are disassembled in sequence, so that parts are prevented from being damaged and are stored for later use;
processing a shaft sleeve working surface: cleaning a shaft sleeve at the roller end of the rolling mill to remove oil stains and rust; processing and removing a fatigue layer of an inner hole of a working surface to be repaired of the shaft sleeve, removing local defects, removing the layer with the thickness of 3-5mm, and carrying out 100% PT flaw detection on the working surface; and (4) determining whether the failure layer of the working surface is removed or not by using nondestructive testing flaw detection and surface hardness detection.
Component detection and determination of the repair material: analyzing chemical components of the shaft sleeve by adopting a mobile spectrometer, and selecting alloy materials for cladding by combining matrix materials and technical requirements;
fourthly, pre-sequence heat treatment: annealing the roller end shaft sleeve in a heat treatment furnace; preheating the shaft sleeve at the roller end before cladding, wherein the preheating temperature and the heat preservation time are determined according to the chemical composition and the wall thickness of the shaft sleeve at the roller end;
cladding the working surface: carrying out laser cladding on the inner hole of the shaft sleeve by using an alloy material;
sixthly, carrying out heat treatment: heating the shaft sleeve at the roller end to a preheating required temperature, and carrying out heat preservation and slow cooling to room temperature;
and (c) machining: machining the working surface of the shaft sleeve at the roller end to meet the relevant requirements of a drawing;
and eighthly, inspection and flaw detection: and (5) inspecting the relevant size of the shaft sleeve, and carrying out nondestructive inspection on the working surface.
Ninthly, delivery of qualified products: detecting unqualified reworking and detecting qualified product delivery.
2. The laser cladding repair method according to claim 1, wherein: step four, pre-sequence heat treatment: preheating before cladding can be furnace entering heating and heating by a heating belt; or the heating in the furnace and the heating by the induction device are carried out; or heating by induction means alone; step sixthly, heat treatment: the induction heating method may be induction heating or other heating methods.
3. The laser cladding repair method according to claim 1, wherein: cladding the working surface: the alloy materials have the following three types: the iron-based alloy soft powder is made of a matrix material and has performance close to that of a matrix material, the granularity is 100-200 meshes, and the mass percentage is as follows: 0.05 percent of C, 18.0 percent of Cr, 0.7 percent of B, 0.9 to 1.0 percent of Si, 10.0 to 12.0 percent of Ni, 2.5 to 3.0 percent of Mo, 0.5 percent of Mn and the balance of Fe; secondly, the material and the performance of the iron-based alloy transition powder between the matrix and the selected reinforced material have the granularity of 100-200 meshes, and the mass percentage is as follows: 0.08 percent of C, 18.0 percent of Cr, 0.7 to 0.8 percent of B, 0.9 to 1.0 percent of Si, 5.0 percent of Ni, 2.0 percent of Mo, 0.5 percent of Mn and the balance of Fe; thirdly, the particle size of the reinforced iron-based alloy hard powder is 100-200 meshes, and the mass percentage is as follows: 0.18-0.2% of C, 15.0-18.0% of Cr, 0.9-1.0% of Si, 2.0% of Ni, 2.0% of Mo, 0.1% of Mn and the balance of Fe.
4. The laser cladding repair method according to claim 3, wherein: cladding the working surface: the combination mode of the alloy materials is as follows: when the shaft sleeve substrate is low in hardness, the alloy material is soft powder, and the cladding layer is a layer; secondly, when the shaft sleeve requires high hardness: 1. the alloy material is soft powder repair + transition powder, the cladding layer is two layers, namely a layer of transition powder is cladded outside the soft powder; 2. the alloy material is soft powder repair, transition powder and hard powder reinforcement, and the cladding layer is three layers, namely a layer of hard powder is cladded outside the transition powder; 3. the alloy material is soft powder repair, transition powder, hard powder reinforcement and transition powder, and the cladding layer is four layers, namely, one layer of transition powder is cladded outside the hard powder.
5. The laser cladding repair method according to claim 1, wherein: cladding the working surface: cladding by using a semiconductor laser, wherein the output mode of a light beam of the semiconductor laser is flat top light; and adopting induction heating as a composite heat source for laser cladding.
6. A composite set for laser cladding is characterized in that: the laser cladding device comprises a laser cladding optical head and an induction heating device (6), which are connected; the laser cladding optical head comprises a laser lens seat assembly, a powder feeding nozzle (5), a laser channel and an alloy powder channel, wherein the laser lens seat assembly comprises a collimating lens seat (3), a reflecting lens seat (4) and a protective lens seat (4-3), the collimating lens seat (3) is connected to the side surface of the reflecting lens seat (4), the protective lens seat (4-3) is connected to the lower surface of the reflecting lens seat (4), and the powder feeding nozzle (5) is connected to the lower surface of the protective lens seat (4-3) through threads; the laser channel and the alloy powder channel reach the powder feeding nozzle (5) through the laser lens seat component; the induction heating device (6) comprises an adapter plate (6-1), an induction coil wire (6-3) with water cooling, an infrared temperature detector (6-4), a hollow water-cooling copper pipe (6-5) and an induction heating coil (6-6); the adapter plate (6-1) is L-shaped, a bolt connecting hole (6-2) is formed in a transverse plate of the adapter plate, and a vertical plate of the adapter plate is hollow; the hollow water-cooling copper pipe (6-5) is U-shaped, the upper opening of the hollow water-cooling copper pipe is communicated with the lower plane of the riser of the adapter plate (6-1) and is insulated at intervals by using a ceramic ring; the induction heating coil (6-6) is connected with the lower section of the hollow water-cooling copper pipe (6-5); two induction coil leads (6-3) are arranged on the left and right sides and penetrate through the unthreaded holes in the transverse plate of the adapter plate (6-1) to be connected with threaded holes in the vertical plate of the adapter plate (6-1); the infrared temperature detector (6-4) is connected to the lower plane of the transverse plate of the adapter plate (6-1) and forms an angle of 45 degrees with the adapter plate (6-1), and the detection direction points to the middle area of the induction heating coil (6-6); the adapter plate (6-1) is connected below the collimating lens base (3) through the bolt connecting hole (6-2); the induction heating coil (6-6) is positioned right below the powder feeding nozzle (5).
7. The laser cladding composite apparatus according to claim 6, wherein: the induction heating device (6) also comprises a soft iron magnetizer (6-7) and an insulating and heat-insulating ceramic plate (6-8); the induction heating coil (6-6) is rectangular, soft iron magnetizers (6-7) are wrapped on three sides of the induction heating coil (6-6), and an insulating heat-insulating ceramic plate (6-8) is covered on one side facing the laser cladding optical head; the soft iron magnetizer (6-7) adopts powder metallurgy ferrite; the induction heating coil (6-6) is a copper pipe, the cross section of the copper pipe is rectangular, and the inside of the copper pipe is hollow.
8. The laser cladding composite apparatus according to claim 6, wherein: the laser channel comprises a laser fiber (1), a collimating mirror (3-13), a focusing reflector (4-15) and a total-transmission protective mirror (4-16); an inverted L-shaped reflecting cavity is arranged in the reflector seat (4), one end of the inverted L-shaped reflecting cavity is horizontally opened at the laser beam input window (4-1), the other end of the inverted L-shaped reflecting cavity is vertically opened below the reflector seat (4), and the focusing reflector (4-15) is fixed at the folding angle of the L-shaped reflecting cavity through the reflector seat (4-2); the collimating lens (3-13) is arranged in a straight cavity in the collimating lens base (3), an opening at one end of the straight cavity is communicated with the laser beam input window (4-1), an opening at the other end of the straight cavity is communicated with the laser fiber (1), and the laser fiber (1) is connected with a fiber connection joint (2) fixed on the side surface of the collimating lens base (3); the full-transparent protective glasses (4-16) are arranged in the protective glass seats (4-3) and are positioned below the vertical opening of the reflecting cavity; the alloy powder channel comprises a horizontal channel on the collimating mirror seat (3) and a vertical channel on the reflecting mirror seat (4); the horizontal channel comprises an alloy powder input end (3-4) and an alloy powder reflector seat end (3-10); the vertical channel comprises an alloy powder input end (4-11), an alloy powder shunting ring groove (4-12) and three alloy powder input ends (4-14).
9. The laser cladding composite apparatus according to claim 6, wherein: the composite device for laser cladding also comprises an optical head protective gas channel, an optical head circulating cooling water channel and an induction coil wire channel; the optical head protection air passage comprises a horizontal channel on the collimating mirror seat (3) and a vertical channel on the reflecting mirror seat (4); the horizontal channel comprises a protective gas input end (3-3) and a protective gas reflector base end (3-9); the vertical channel comprises a protective gas input end (4-10) and a protective gas output end (4-13); the optical head circulating cooling water channel comprises a horizontal water inlet channel and a horizontal water outlet channel on the collimating mirror seat (3), and a water inlet channel and a water outlet channel on the reflecting mirror seat (4); the horizontal water inlet channel comprises a cooling water input end (3-5) and a cooling water input reflector base end (3-11), and the horizontal water outlet channel comprises a cooling water reflector base output end (3-12) and a cooling water output end (3-6); the water inlet channel on the reflector seat (4) comprises a reflector seat cooling water input end (4-4), a reflector cooling water input end (4-5), a cooling water output end (4-6) and a powder feeding nozzle cooling water input end (4-7), and the water outlet channel comprises a powder feeding nozzle cooling water output end (4-8) and a reflector seat cooling water output end (4-9); the induction coil wire channel is arranged on the collimating lens base (3) and comprises an induction coil wire input end (3-1), an induction coil wire heating head end (3-7), an induction coil wire heating head end (3-8) and an induction coil wire output end (3-2).
10. The hybrid apparatus for laser cladding according to claim 9, wherein: the laser cladding composite device also comprises a support rod (7), one end of the support rod (7) is connected to the side surface of the collimating lens seat (3), and the other end is provided with a support rod switching base (7-8); the support rod (7) is of a double-layer structure, the inner layer of the support rod is coated with a laser fiber, an induction coil wire, an optical head cooling water pipeline, an optical head protective gas pipeline and an alloy powder channel are arranged between the inner layer and the outer layer, and the end face of the support rod is sealed by a prefabricated sealing ring matched with an O-shaped ring.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406268A (en) * | 2022-03-29 | 2022-04-29 | 北京煜鼎增材制造研究院有限公司 | Method for repairing side wall of single crystal high temperature alloy turbine blade |
| CN114918611A (en) * | 2022-05-19 | 2022-08-19 | 泰尔(安徽)工业科技服务有限公司 | Repairing method for bearing seat of hot rolling large-scale rolling mill |
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2021
- 2021-09-26 CN CN202111128310.8A patent/CN113802117A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406268A (en) * | 2022-03-29 | 2022-04-29 | 北京煜鼎增材制造研究院有限公司 | Method for repairing side wall of single crystal high temperature alloy turbine blade |
| CN114918611A (en) * | 2022-05-19 | 2022-08-19 | 泰尔(安徽)工业科技服务有限公司 | Repairing method for bearing seat of hot rolling large-scale rolling mill |
| CN114918611B (en) * | 2022-05-19 | 2023-10-20 | 泰尔(安徽)工业科技服务有限公司 | Repairing method for bearing seat of hot-rolled large-scale rolling mill |
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Application publication date: 20211217 |