CN112296595B - Cutterhead repairing technology - Google Patents
Cutterhead repairing technology Download PDFInfo
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- CN112296595B CN112296595B CN202011259262.1A CN202011259262A CN112296595B CN 112296595 B CN112296595 B CN 112296595B CN 202011259262 A CN202011259262 A CN 202011259262A CN 112296595 B CN112296595 B CN 112296595B
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- cutterhead
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- alloy teeth
- repairing
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- 238000005516 engineering process Methods 0.000 title abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 34
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 34
- 238000005299 abrasion Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 18
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000008439 repair process Effects 0.000 claims abstract description 10
- 238000009659 non-destructive testing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000005253 cladding Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 13
- 229910052804 chromium Inorganic materials 0.000 claims description 13
- 239000011651 chromium Substances 0.000 claims description 13
- 230000007547 defect Effects 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 238000004372 laser cladding Methods 0.000 claims description 10
- 238000004381 surface treatment Methods 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000006378 damage Effects 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 7
- 239000006247 magnetic powder Substances 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 5
- 238000009713 electroplating Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000012958 reprocessing Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
- B23K26/342—Build-up welding
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a cutterhead repairing technology, which comprises the steps of repairing a central cutterhead and a combined cutter frame and repairing a hob 3 and a stabilizing block 5, and comprises the following steps: reprocessing the deformation and the crack on the central cutter head and the combined cutter frame by a pretreatment, repair welding or shaping method; the method comprises the steps of carrying out nondestructive testing on a hob and a stabilizing block, carrying out pretreatment, then carrying out integral preheating at 80-120 ℃, carrying out integral dismantling and replacement on alloy teeth with the abrasion degree of more than 80%, carrying out local preheating at 180-220 ℃ on alloy teeth with the abrasion degree of more than 50%, carrying out integral dismantling and replacement, and welding the alloy teeth with the abrasion degree of less than 50% by adopting tungsten carbide materials.
Description
Technical Field
The invention relates to the technical field of cutterhead repair, in particular to a cutterhead repair technology.
Background
The raise boring machine is a shaft excavation mechanical device which utilizes rotary drilling to break rock and form holes and can reversely ream holes, has an important function in the exploitation field, along with the requirement of resources, the exploitation industry is continuously developed and expanded, and the exploitation difficulty of underground resources is higher, so that related mechanical devices are manufactured, along with the progress of the industry and the continuous innovation of the technology, the application range of the raise boring machine is continuously expanded, and the requirement on the boring machine is more and more strict, and the higher requirement of people on the performance can be met only by continuous improvement.
The cutter head for the modern raise boring machine belongs to underground mining equipment, the cutter head and the hob are used as main consumption parts of the raise boring machine, the repair and remanufacturing are particularly important, and when the raise boring machine works, drill rods are broken and fall from high altitude to cause deformation, so that the use of the cutter head is affected, local repair is needed, the utilization rate of products is improved, and the service life is prolonged. Therefore, the present invention provides a cutterhead repairing technology to solve the problems set forth in the above-mentioned background art.
Disclosure of Invention
The invention aims to provide a cutterhead repairing technology to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A cutter head repairing technology, which is used for repairing a central cutter head and a combined cutter frame and repairing a hob 3 and a stabilizing block 5, comprises the following steps:
s1: and carrying out nondestructive detection on the combined tool rest with deformation and cracking gaps to determine the damaged part and crack trend of the metal structural part containing the micro cracks, carrying out surface inspection or crack defect and hidden damage of the magnetic powder inspection metal structural part, integrally replacing the combined tool rest with the defect part being more than 50% of the whole, and carrying out reprocessing on the deformation and the cracks on the combined tool rest with the center tool rest and the defect part being less than 50% of the whole by a pretreatment, repair welding or reshaping method.
S2: carrying out nondestructive testing on a hob and a stabilizing block to determine the damaged part and the crack trend of a metal structural member containing micro cracks, carrying out surface inspection or carrying out magnetic powder inspection on the crack defect and the hidden damage of the metal structural member, carrying out pretreatment, then carrying out integral preheating at 80-120 ℃, carrying out integral dismantling and replacement on the alloy teeth with the abrasion degree of more than 80%, carrying out local preheating at 180-220 ℃ on the alloy teeth with the corresponding abrasion degree of more than 50%, and carrying out integral dismantling and replacement on the alloy teeth, so as to ensure the stabilizing effect of the alloy teeth, and carrying out welding on the alloy teeth with the abrasion degree of less than 50% by adopting a tungsten carbide material to play a role in abrasion resistance;
S3: wear of the bearing runners and shafts in the hob is achieved by surface treatment and regrinding of the worn surfaces to the assembled dimensions.
S4: and polishing the surfaces of the hob and the stabilizing block after welding and the surfaces of the central cutterhead and the combined cutter frame, carrying out surface treatment, cleaning and drying to ensure that the surfaces reach the assembly size, and the repaired hob and the repaired stabilizing block have the same service life as the new hob.
As a further scheme of the invention, the pretreatment means that dust, greasy dirt and rust on the surface are removed, and the surface is cleaned by acetone; detecting the size of each part, determining the failure part and the abrasion loss thereof, determining the deformation and removing the fatigue layer of the failure part by 0.5mm to 2mm, and cleaning.
As a further scheme of the invention, the surface treatment specifically refers to immersing a hob and a stabilizing block, a center cutter head and a combined cutter head which are welded into a chromium-containing electrolyte with the temperature of 55-65 ℃, and introducing current with the current density of 20-50A/dm < 2 >, electroplating for 80-120min to form a hard chromium layer with the thickness of 40-80 mu m, thus obtaining a wear-resistant coating and improving the wear resistance of the wear-resistant coating.
As a still further scheme of the invention, the welding mode of the alloy teeth is laser fusing, and the method comprises the following operation steps:
s1, molding a ceramic mold on a part to be repaired, and carrying out partial cladding to ensure that the internal dimension of the mold accords with the assembly dimension;
S2: carrying out laser cladding layer by layer in a preset powder feeding mode, wherein the thickness of each cladding layer is smaller than or equal to 0.35mm from the lowest point in a tooth slot, the next cladding layer is covered on the previous cladding layer, and the edge of the next cladding layer extends outwards from the edge of the previous cladding layer by 1mm to 4mm;
And S3, after welding, cooling to below 30 degrees, and after the ceramic die is impacted and destroyed, the alloy teeth are detected to be qualified, and then the ceramic die can be installed.
As a still further scheme of the invention, the laser cladding is to use a rapid transverse flow carbon dioxide laser as a light source to carry out continuous lap joint scanning; the laser power is 1.8-2.0KW, the elevation is 260mm to 280mm, the spot size is 5mm multiplied by 1.5mm, the scanning speed is 110mm/min to 130mm/min, the lap joint amount is 6.5mm, and the powder feeding amount is 10g/min to 14g/min.
As a still further scheme of the invention, the tungsten carbide powder comprises the following components in percentage by weight: c is less than or equal to 0.5 percent, cr:38% -52%, B:1.5% -2.5%, si:0.5% -1.5%, WC:43-47%, and the balance of Fe.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention repairs the damaged part of the cutterhead step by step, so that the repaired part has the same service life as the newly replaced part, the utilization rate of the product is improved, and the service life is prolonged.
2. The invention uses laser to build up welding blade, uses tungsten carbide composite alloy powder to build up welding the abrasion part, and the laser build up welding layer has good hardness and toughness.
Drawings
Fig. 1 is a schematic structural diagram of a combined tool holder in a cutterhead repairing technology.
Fig. 2 is a schematic diagram of a hob in a cutterhead repair technique.
Fig. 3 is a flow chart of a hob repairing process in the cutterhead repairing technology.
In the figure: 1. a central cutterhead; 2. a combined tool rest; 3. a hob; 4. alloy teeth; 5. a stabilizing block; 6. a shaft; 7. and a bearing slideway.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, in an embodiment of the present invention, a cutterhead repairing technology includes repairing a center cutterhead 1 and a combined cutterhead 2, including the following steps:
S1: the combined tool rest 2 with deformation and cracking gaps is subjected to nondestructive testing to determine the damaged part and crack trend of the metal structural part containing the micro cracks, surface inspection or magnetic powder inspection is carried out to detect crack defects and hidden damages of the metal structural part, the combined tool rest 2 with the defect part being more than 50% of the whole is replaced integrally, and the deformation and cracks on the combined tool rest 2 with the center cutter head 1 and the defect part being less than 50% of the whole are reprocessed by a pretreatment, repair welding or reshaping method.
S2: the surfaces of the welded central cutter head 1 and the combined cutter head 2 are polished, surface treated, cleaned and dried to reach the assembly size, so that the repaired hob 3 and the repaired stabilizing block 5 have the same service life as a new hob.
Wherein, the pretreatment means that dust, greasy dirt and rust on the surface are removed, and the surface is cleaned by acetone; detecting the size of each part, determining the failure part and the abrasion loss thereof, determining the deformation and removing the fatigue layer of the failure part by 0.5mm to 2mm, and cleaning.
The surface treatment specifically comprises the steps of immersing the hob 3, the stabilizing block 5, the center cutterhead 1 and the combined cutterhead 2 after welding into a chromium-containing electrolyte with the temperature of 55-65 ℃, introducing current with the current density of 20-50A/dm < 2 >, electroplating for 80-120min, forming a hard chromium layer with the thickness of 40-80 mu m, obtaining a wear-resistant coating, and improving the wear resistance of the hard chromium coating.
Example two
Referring to fig. 2 and 3, in an embodiment of the present invention, a cutterhead repairing technology includes repairing a hob 3, including the following steps:
S1, carrying out nondestructive testing on a hob 3 to determine the damaged part and the crack trend of a metal structural member containing micro cracks, carrying out surface inspection or carrying out magnetic powder inspection on the crack defect and the hidden injury of the metal structural member, carrying out pretreatment, then carrying out integral preheating at 80-120 ℃, carrying out integral dismantling and replacement on the alloy teeth with the abrasion degree of more than 80%, carrying out local preheating at 180-220 ℃ on the alloy teeth with the corresponding abrasion degree of more than 50%, and carrying out integral dismantling and replacement on the alloy teeth, so as to ensure the stability of the alloy teeth, and welding the alloy teeth with the abrasion degree of less than 50% by adopting tungsten carbide materials to play a role in abrasion resistance;
S2: the wear of the bearing runner 7 and the shaft 6 in the hob 3 is brought to assembly dimensions by surface treatment and regrinding of the worn surface.
S3: the surface of the hob 3 after welding is polished, surface treated, cleaned and dried to reach the assembly size, so that the hob 3 after repairing has the same service life as a new hob.
Wherein, the pretreatment means that dust, greasy dirt and rust on the surface are removed, and the surface is cleaned by acetone; detecting the size of each part, determining the failure part and the abrasion loss thereof, determining the deformation and removing the fatigue layer of the failure part by 0.5mm to 2mm, and cleaning.
The surface treatment specifically means that the hob 3 after welding is immersed into chromium-containing electrolyte with the temperature of 55-65 ℃, current with the current density of 20-50A/dm < 2 > is introduced into the chromium-containing electrolyte, and the hard chromium layer with the thickness of 40-80 mu m is formed by electroplating for 80-120min, so that the wear-resistant coating is obtained, and the wear resistance of the hob is improved.
The welding mode of the alloy teeth is laser fusing, and the method comprises the following operation steps:
s1, molding a ceramic mold on a part to be repaired, and carrying out partial cladding to ensure that the internal dimension of the mold accords with the assembly dimension;
S2: carrying out laser cladding layer by layer in a preset powder feeding mode, wherein the thickness of each cladding layer is smaller than or equal to 0.35mm from the lowest point in a tooth slot, the next cladding layer is covered on the previous cladding layer, and the edge of the next cladding layer extends outwards from the edge of the previous cladding layer by 1mm to 4mm;
And S3, after welding, cooling to below 30 degrees, and after the ceramic die is impacted and destroyed, the alloy teeth are detected to be qualified, and then the ceramic die can be installed.
The laser cladding is to take a rapid transverse flow carbon dioxide laser as a light source to carry out continuous lap joint scanning; the laser power is 1.8-2.0KW, the elevation is 260mm to 280mm, the spot size is 5mm multiplied by 1.5mm, the scanning speed is 110mm/min to 130mm/min, the lap joint amount is 6.5mm, and the powder feeding amount is 10g/min to 14g/min;
The tungsten carbide powder comprises the following components in percentage by weight: c is less than or equal to 0.5 percent, cr:38% -52%, B:1.5% -2.5%, si:0.5% -1.5%, WC:43-47%, and the balance of Fe;
Example III
In the embodiment of the invention, a cutterhead repairing technology comprises the following steps of:
The method comprises the steps of S1, carrying out nondestructive testing on a stabilizing block 5 to determine the damaged part and the crack trend of a metal structural member containing micro cracks, carrying out surface inspection or carrying out magnetic powder inspection on the crack defect and the hidden injury of the metal structural member, carrying out pretreatment, then carrying out integral preheating at 80-120 ℃, carrying out integral dismantling and replacement on the alloy teeth with the abrasion degree of more than 80%, carrying out local preheating at 180-220 ℃ on the alloy teeth with the corresponding abrasion degree of more than 50%, and carrying out integral dismantling and replacement on the alloy teeth, so as to ensure the stabilizing effect of the alloy teeth, and carrying out welding on the alloy teeth with the abrasion degree of less than 50% by adopting tungsten carbide materials to play the abrasion-resistant effect;
s2: the welded surface of the stabilizing block 5 is polished, surface treated, cleaned and dried to reach the assembly size, so that the repaired stabilizing block 5 has the same service life as a new hob.
Wherein, the pretreatment means that dust, greasy dirt and rust on the surface are removed, and the surface is cleaned by acetone; detecting the size of each part, determining the failure part and the abrasion loss thereof, determining the deformation and removing the fatigue layer of the failure part by 0.8mm to 2mm, and cleaning.
The surface treatment specifically means that the welded stable block 5 is immersed into chromium-containing electrolyte with the temperature of 55-65 ℃, current with the current density of 20-50A/dm < 2 > is introduced into the chromium-containing electrolyte, and the hard chromium layer with the thickness of 40-60 mu m is formed by electroplating for 80-100min, so that the wear-resistant coating is obtained, and the wear resistance of the wear-resistant coating is improved.
The welding mode of the alloy teeth is laser fusing, and the method comprises the following operation steps:
s1, molding a ceramic mold on a part to be repaired, and carrying out partial cladding to ensure that the internal dimension of the mold accords with the assembly dimension;
S2: carrying out laser cladding layer by layer in a preset powder feeding mode, wherein the thickness of each cladding layer is smaller than or equal to 0.35mm from the lowest point in a tooth slot, the next cladding layer is covered on the previous cladding layer, and the edge of the next cladding layer extends outwards from the edge of the previous cladding layer by 1mm to 4mm;
And S3, after welding, cooling to below 30 degrees, and after the ceramic die is impacted and destroyed, the alloy teeth are detected to be qualified, and then the ceramic die can be installed.
The laser cladding is to take a rapid transverse flow carbon dioxide laser as a light source to carry out continuous lap joint scanning; the laser power is 1.8-2.0KW, the elevation is 260mm to 280mm, the spot size is 5mm multiplied by 1.5mm, the scanning speed is 110mm/min to 130mm/min, the lap joint amount is 6.5mm, and the powder feeding amount is 10g/min to 14g/min;
The tungsten carbide powder comprises the following components in percentage by weight: c is less than or equal to 0.5 percent, cr:38% -52%, B:1.5% -2.5%, si:0.5% -1.5%, WC:43-47%, and the balance of Fe;
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The cutterhead repairing method comprises the steps of repairing a central cutterhead and a combined cutter frame and repairing a hob and a stabilizing block, and is characterized by comprising the following steps of:
S1: nondestructive testing is carried out on the combined tool rest with deformation and cracking gaps to determine the damaged part and crack trend of the metal structural part containing micro cracks, surface inspection or magnetic powder inspection is carried out on crack defects and hidden damages of the metal structural part, the combined tool rest with the defect part being more than 50% of the whole is replaced integrally, and the deformation and cracks on the combined tool rest with the center tool rest and the defect part being less than 50% of the whole are reprocessed by a pretreatment, repair welding or reshaping method;
S2: nondestructive testing is carried out on the hob and the stabilizing block to determine the damaged part and the crack trend of the metal structural member containing the micro cracks, after surface inspection or magnetic powder inspection is carried out on the crack defect and the hidden damage of the metal structural member, pretreatment is carried out, then the whole hob and the stabilizing block are preheated at 80 ℃ to 120 ℃ and the whole hob and the stabilizing block with the abrasion degree larger than 80% are removed and replaced; judging the abrasion condition of the alloy teeth by judging the abrasion degree of the hob and the stabilizing block not more than 80%, carrying out local preheating on the alloy teeth with the corresponding abrasion degree of more than 50% at 180-220 ℃, then wholly dismantling the alloy teeth, replacing the alloy teeth, ensuring the stabilizing effect of the alloy teeth, and adopting tungsten carbide materials for welding the alloy teeth with the abrasion degree of less than 50%, thereby playing the role of abrasion resistance;
S3: the bearing slideway and the shaft in the hob are worn, and the assembly size is achieved by carrying out surface treatment on the worn surface and regrinding;
s4: and polishing the surfaces of the hob and the stabilizing block after welding and the surfaces of the central cutterhead and the combined cutter frame, carrying out surface treatment, cleaning and drying to ensure that the surfaces reach the assembly size, and the repaired hob and the repaired stabilizing block have the same service life as the new hob.
2. The cutterhead repairing method according to claim 1, wherein the pretreatment is to remove dust, greasy dirt and rust on the surface and clean the surface with acetone; detecting the size of each part, determining the failure part and the abrasion loss thereof, determining the deformation and removing the fatigue layer of the failure part by 0.5mm to 2mm, and cleaning.
3. The cutterhead repairing method according to claim 1, wherein the surface treatment specifically comprises immersing a welded hob and a welded stabilization block as well as a central cutterhead and a combined cutterhead in a chromium-containing electrolyte with a temperature of 55-65 ℃, introducing a current with a current density of 20-50A/dm < 2 >, electroplating for 80-120min, and forming a hard chromium layer with a thickness of 40-80 μm to obtain a wear-resistant coating.
4. The cutterhead repairing method according to claim 1, wherein the welding mode of the alloy teeth is laser cladding, and the method comprises the following operation steps:
s1, molding a ceramic mold on a part to be repaired, and carrying out partial cladding to ensure that the internal dimension of the mold accords with the assembly dimension;
S2: carrying out laser cladding layer by layer in a preset powder feeding mode, wherein the thickness of each cladding layer is smaller than or equal to 0.35mm from the lowest point in a tooth slot, the next cladding layer is covered on the previous cladding layer, and the edge of the next cladding layer extends outwards from the edge of the previous cladding layer by 1mm to 4mm;
And S3, after welding, cooling to below 30 degrees, and after the ceramic die is impacted and destroyed, the alloy teeth are detected to be qualified, and then the ceramic die can be installed.
5. The cutterhead repairing method of claim 4, wherein the laser cladding is continuous lap scanning with a rapid cross-flow carbon dioxide laser as a light source; the laser power is 1.8-2.0KW, the elevation is 260mm to 280mm, the spot size is 5mm multiplied by 1.5mm, the scanning speed is 110mm/min to 130mm/min, the lap joint amount is 6.5mm, and the powder feeding amount is 10g/min to 14g/min.
6. The cutterhead repairing method of claim 5, wherein the powder feeding in the laser cladding is tungsten carbide powder, and the tungsten carbide powder comprises the following components in percentage by weight: c is less than or equal to 0.5 percent, cr:38% -52%, B:1.5% -2.5%, si:0.5% -1.5%, WC:43-47%, and the balance of Fe.
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| CN112296595A (en) | 2021-02-02 |
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