CN114770028A - Remanufacturing method of pipe mold based on submerged arc welding and laser cladding - Google Patents
Remanufacturing method of pipe mold based on submerged arc welding and laser cladding Download PDFInfo
- Publication number
- CN114770028A CN114770028A CN202210619682.9A CN202210619682A CN114770028A CN 114770028 A CN114770028 A CN 114770028A CN 202210619682 A CN202210619682 A CN 202210619682A CN 114770028 A CN114770028 A CN 114770028A
- Authority
- CN
- China
- Prior art keywords
- pipe die
- submerged arc
- laser cladding
- welding
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 60
- 238000004372 laser cladding Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008439 repair process Effects 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- 238000005253 cladding Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005496 tempering Methods 0.000 claims description 7
- 238000005299 abrasion Methods 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 32
- 238000005516 engineering process Methods 0.000 abstract description 17
- 230000001276 controlling effect Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000002344 surface layer Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 239000000428 dust Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- -1 oxides Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 206010011376 Crepitations Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
Abstract
The invention belongs to the field of die remanufacturing, and particularly relates to a remanufacturing method of a pipe die based on submerged arc welding and laser cladding. The invention adopts a mode of combining submerged arc welding and laser cladding, performs bottom layer repair by the submerged arc welding with higher efficiency, performs surface layer repair by adopting a laser cladding technology, improves the performance and the processing efficiency by regulating and controlling a multi-structure microstructure, and optimizes the repair cost on the premise of ensuring the quality.
Description
Technical Field
The invention belongs to the field of mold remanufacturing, and particularly relates to a remanufacturing method of a pipe mold based on submerged arc welding and laser cladding.
Background
The centrifugal nodular cast iron pipe die is called a pipe die for short and is also called a pipe die for casting. The material is 21CrMo10 steel, belonging to hot work die steel. The pipe die is a key part for casting cast iron pipes on a centrifugal casting machine, belongs to an easily-damaged die and has large demand.
The tube die has several failure modes:
(1) thermal fatigue: the pipe die is mainly in a failure mode, because the use environment is severe, molten iron (1300-1450 ℃) in the pouring process is coated on the inner wall of the pipe die due to the centrifugal effect, the temperature of the inner wall of the pipe die is rapidly increased, and the outer surface of the pipe die is cooled by circulating water to reduce the temperature. The change of temperature causes the alternating change of stress, thermal fatigue appears after a period of service, and finally large-area cracks are formed, particularly at the socket end of the pipe die, the amount of the borne molten iron is the largest, and the pipe die belongs to the area with the most serious cracks.
(2) Plastic deformation: the pipe die is subjected to rapid thermal quenching and repeated circulation for a long time in the service process, and when the limit thermal stress is exceeded or the pipe die is impacted by external force, irreversible plastic deformation can occur.
(3) Thermal abrasion: the molten iron in the pipe die mold is cooled and solidified to form a centrifugal nodular cast iron pipe (cast pipe), when the cast pipe is pulled out of the die by the claw puller, the cast pipe is easy to wear, and serious scratch and abrasion can be caused after long-term use without maintenance.
(4) Local fracture: if the cracks are not treated, not only cracks can be generated, but also local fracture can be generated, so that molten iron is leaked and splashed, and the method is very dangerous.
At present, the pipe die is repaired by the following methods:
(1) submerged arc surfacing technology: the current most important technology for repairing the pipe die is as follows: namely, a mode of layer-by-layer accumulation repair of submerged arc welding wires is adopted. The submerged arc surfacing welding is high in efficiency and high in speed, compared with a laser technology, the submerged arc surfacing welding is low in cost, most surfacing layers are thick widmannstatten structures, and thermal fatigue cracks are easily caused again in the surfacing layers under the working conditions of high temperature, rapid cooling and rapid heating, so that the fatigue resistance of a pipe die is reduced, and premature failure is caused.
(2) The laser cladding technology comprises the following steps: with the gradual maturity of the laser technology, the laser cladding repair technology has higher and higher specific gravity in the repair market, good quality, highly compact material structure, almost no defect, no complex process, no preheating before welding and high-temperature tempering after welding, but the key for restricting the development of the technology lies in expensive equipment, slower repair speed than submerged arc surfacing and relatively low efficiency.
(3) A few departments adopt a thermal spraying technology and manual welding rods or welding wires for surfacing, and the two technologies are far from the national standard, the industrial standard and the industrial use requirement of the pipe die, so that the two technologies are abandoned basically.
The pipe die repair needs to satisfy the following properties:
(1) the pipe die has good high-temperature performance and high enough fracture toughness, so that the formation of fatigue cracks and crazing can be delayed, the service life of the pipe die is prolonged, and the economic benefit is improved.
(2) The high-temperature performance and the fracture toughness are met, and meanwhile, the corresponding hardness is ensured, and the severe scratching and abrasion are prevented.
Based on the method, the application provides a remanufacturing method of the pipe die based on submerged arc welding and laser cladding.
Disclosure of Invention
The invention aims to provide a remanufacturing method of a pipe die based on submerged arc welding and laser cladding, which solves the problems in the background art.
In order to achieve the aim, the invention provides a remanufacturing method of a pipe die based on submerged arc welding and laser cladding, which comprises the following steps of firstly turning or boring all thermal fatigue cracks, abrasion scratches and high-temperature oxidation fatigue layers on the inner wall of the pipe die, then bottoming by using submerged arc build-up welding as a transition layer, tempering the pipe die repaired by build-up welding, then processing to be 2-3mm smaller than the diameter of a finished product, then laser cladding a super-strong high-temperature thermal fatigue resistant and high-wear resistant cladding layer on the surface of the build-up welding by using a laser cladding coaxial powder feeding method, and finally finishing to a specified size and precision, wherein the specific process steps are as follows:
(1) pre-treating, turning or boring all thermal fatigue layers of the inner wall of the pipe die, including thermal fatigue cracks and crazing, to obtain a smooth inner hole surface;
(2) carrying out magnetic powder inspection or dye inspection on the surface of the pipe die to detect whether cracks exist, and if cracks exist, locally continuing turning or boring until no cracks exist;
(3) cleaning the inner wall of the pipe die to ensure that the surface of the pipe die to be subjected to submerged arc surfacing does not contain any dirt such as oxide, oil stain, dust and the like;
(4) the pipe die is stably placed into a heating furnace for preheating at the preheating temperature of 250 ℃ and 300 ℃ for 3-4 hours;
(5) bottoming a high-toughness transition layer of submerged arc surfacing welding on the inner wall of the pipe die, wherein the size of the surfacing welding is 3-4mm larger than the diameter of a finished pipe die, and controlling the temperature between welding layers to be 200-300 ℃ in the surfacing welding process of the pipe die;
(6) tempering the pipe die repaired by submerged arc overlaying, heating the pipe die to 550-600 ℃ along with a furnace, preserving heat for 4-6 hours, cooling along with the furnace, taking out the pipe die from the furnace when the temperature is reduced to below 150 ℃, air-cooling to room temperature, and processing to the diameter of 2-3mm smaller than that of a finished product;
(7) cleaning the inner wall of the pipe die to ensure that the laser cladding area to be treated has no dirt such as oxide, oil stain, dust and the like;
(8) carrying out laser cladding strengthening repair on the surface of the pipe die by submerged arc surfacing, carrying out laser cladding repair on 3-4 layers, and carrying out finish machining on a cladding layer with the thickness of 1.0-1.6mm and high-temperature thermal fatigue resistance to specified size and precision;
(9) and finally, dotting the inner wall of the inner hole of the tube mold by using a dotting machine tool.
Further, according to the material, performance and thermal expansion coefficient of the pipe die, blending a submerged arc surfacing transition layer backing welding wire, wherein the chemical components and mass fractions are as follows: 0.15-0.25% of C, 0.20-0.40% of Si, 0.30-0.60% of Mn, 2.20-2.60% of Cr, 0.30-0.50% of Mo, less than or equal to 0.50% of Ni and the balance of Fe, wherein the diameter of the welding wire is 3.0-4.0 mm, the flux is 504S type or SJ101 type, and the weight ratio of the welding wire to the flux is 0.8-1.0.
Further, according to the material, performance and thermal expansion coefficient of the transition overlaying layer, blending the components of the laser cladding alloy powder, and determining the mesh number of the alloy powder, wherein the chemical components and the mass fractions of the laser cladding high-temperature-resistant thermal fatigue powder are as follows: 50-55% of Ni, 17-21% of Cr, less than or equal to 0.08% of C, less than or equal to 0.035% of Mn, less than or equal to 0.3% of Cu, less than or equal to 1.0% of Co, 0.2-0.8% of Al, 0.65-1.15% of Ti, 4.75-5.5% of Nb, and the balance of Fe, wherein the powder particle mesh number is 100-300 meshes.
Further, in the steps (1), (5) and (8), the pipe die to be repaired is arranged on an automatic roller frame capable of stepless speed regulation.
The invention has the beneficial effects that:
(1) the method solves the problems of incompact weld overlay organizational structure, internal pore defect, high dilution rate, changeability, low mechanical property and the like, and prolongs the service life of the repaired pipe die.
(2) The method solves the problems that the laser cladding technology is low in efficiency and high in cost, parts with large-area damage and thick are difficult to repair and the like, and can be widely applied to the field of remanufacturing of large equipment parts.
(3) The invention adopts a mode of combining submerged arc welding and laser cladding, performs bottom layer repair by the submerged arc welding with higher efficiency, performs surface layer repair by adopting a laser cladding technology, improves the performance and the processing efficiency by regulating and controlling a multi-structure microstructure, and optimizes the repair cost on the premise of ensuring the quality.
Drawings
FIG. 1 is a schematic diagram of a finished product after submerged arc surfacing and laser cladding repair in an embodiment of the invention;
FIG. 2 is a drawing of a centrifugal ductile iron pipe mold according to an embodiment of the present invention;
FIG. 3 is a sample view of the thermal fatigue cracking of the surface of a pipe mold according to an embodiment of the present invention;
FIG. 4 is a partial fracture view of the surface of a pipe die according to an embodiment of the present invention;
FIG. 5 is a first sample view of the thermal fatigue crack on the surface of the pipe die according to the embodiment of the present invention;
FIG. 6 is a second sample view of the thermal fatigue cracks on the surface of the pipe die according to the embodiment of the present invention;
FIG. 7 is a sample graph of the surface high temperature oxidation failure of a pipe die according to an embodiment of the present invention;
FIG. 8 is a sample drawing of the tube mold with the surface cracks removed in accordance with an embodiment of the present invention;
FIG. 9 is a surface view of a pipe die of the embodiment of the present invention after removing a rough layer on the surface of submerged arc welding;
FIG. 10 is a first sample drawing of the morphology of the pipe mold after laser cladding repair according to the embodiment of the present invention;
FIG. 11 is a second sample drawing of the tube mold surface after laser cladding repair according to an embodiment of the present invention;
FIG. 12 is a sample drawing of the surface of the tube mold after turning according to the embodiment of the present invention;
fig. 13 is a tube mold sample after dotting the surface of the tube mold in accordance with the embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the tube die comprises a tube die base material 1, a submerged arc surfacing layer 2 and a laser cladding layer 3.
Example (b):
the invention adopts the composite remanufacturing technology of submerged arc surfacing and laser cladding to repair a large-scale die for the first time, and the invention takes a pipe die as an example, please refer to fig. 1-13:
a tube mould is based on the remanufacturing method of submerged arc welding and laser cladding, at first turn away or bore all thermal fatigue crackles, chaps, abrasion scratch, high temperature oxidation fatigue layer of the inner wall of the tube mould, then use the submerged arc build-up welding as the transition layer to set the bottom, temper the tube mould repaired by build-up welding, then process to be less than finished diameter 2-3mm, then use the method of laser cladding coaxial powder feeding to build-up welding surface laser cladding a layer of superstrong high temperature thermal fatigue resistant high wear resistant cladding layer, finish machining to the specified size and precision, its concrete process steps are:
(1) pre-treating, turning or boring all thermal fatigue layers on the inner wall of the pipe die, including thermal fatigue cracks and crazing, to obtain a smooth inner hole surface;
(2) carrying out magnetic powder inspection or dye inspection on the surface of the pipe die to detect whether cracks exist, and if cracks exist, locally continuing turning or boring until no cracks exist;
(3) cleaning the inner wall of the pipe die to ensure that the surface of the pipe die to be subjected to submerged arc surfacing does not contain any dirt such as oxide, oil stain, dust and the like;
(4) the pipe die is stably placed into a heating furnace for preheating, the preheating temperature is 250-300 ℃, and the preheating and heat preservation time is 3-4 hours;
(5) bottoming a transition layer of a high-strength and high-toughness pipe through submerged arc surfacing welding on the inner wall of the pipe die, wherein the size of the surfacing welding is 3-4mm larger than the diameter of a pipe die finished product, and the temperature between welding layers is controlled at 300 ℃ in the pipe die surfacing welding process;
(6) tempering the pipe die repaired by submerged arc overlaying, heating the pipe die to 550-600 ℃ along with a furnace, preserving heat for 4-6 hours, cooling along with the furnace, taking out the pipe die from the furnace when the temperature is reduced to below 150 ℃, air-cooling to room temperature, and processing to the diameter of 2-3mm smaller than that of a finished product;
(7) cleaning the inner wall of the pipe die to ensure that the area to be laser-clad is free from oxide, oil stain, dust and other dirt;
(8) carrying out laser cladding strengthening repair on the surface of the pipe die by submerged arc surfacing, carrying out laser cladding repair on 3-4 layers, and carrying out finish machining on a cladding layer with the thickness of 1.0-1.6mm and high-temperature thermal fatigue resistance to specified size and precision;
(9) and finally dotting the inner wall of the inner hole of the pipe die by using a dotting machine tool.
In this embodiment, according to the material, performance and thermal expansion coefficient of the pipe die, the backing welding wire for the submerged arc surfacing transition layer is prepared, and the chemical components and the mass fraction thereof are as follows: 0.15-0.25% of C, 0.20-0.40% of Si, 0.30-0.60% of Mn, 2.20-2.60% of Cr, 0.30-0.50% of Mo, less than or equal to 0.50% of Ni and the balance of Fe, wherein the diameter of the welding wire is 3.0-4.0 mm, the flux is 504S type or SJ101 type, and the weight ratio of the welding wire to the flux is 0.8-1.0.
In this embodiment, according to the material, performance and thermal expansion coefficient of the transition weld overlay, the components of the laser cladding alloy powder are prepared, and the mesh number of the alloy powder is determined, wherein the chemical components and mass fractions of the laser cladding high-temperature thermal fatigue resistant powder are as follows: 50-55% of Ni, 17-21% of Cr, less than or equal to 0.08% of C, less than or equal to 0.035% of Mn, less than or equal to 0.3% of Cu, less than or equal to 1.0% of Co, 0.2-0.8% of Al, 0.65-1.15% of Ti, 4.75-5.5% of Nb, and the balance of Fe, wherein the mesh number of the powder particles is 100-300 meshes.
In this embodiment, in the steps (1), (5) and (8), the pipe die to be repaired is mounted on an automatic roller frame capable of stepless speed regulation.
It should be noted that, in preparation:
1. submerged arc build-up welding technique
(1) Cleaning pollutants such as oxides, oil stains, dust and the like in a pipe die area to be repaired;
(2) the speed stability of the roller carrier is guaranteed;
(3) preheating before welding and high-temperature tempering after welding.
2. Preparation before cladding
(1) Cleaning pollutants such as oxides, oil stains, dust and the like in a to-be-repaired area of the pipe die;
(2) the speed stability of the roller carrier is guaranteed;
(3) determining the optimal laser cladding process parameters;
(4) ensuring the gas quantity of a protective gas (mainly argon) cylinder is sufficient;
(5) ensuring sufficient high-temperature alloy powder in the powder feeder;
(6) ensuring that the protective lens in the laser head is clean and pollution-free;
(7) and (4) making a cladding track (machine tool codes or mechanical arm programs).
The specific process parameters adopted in this embodiment are as follows:
TABLE 1 submerged arc build-up welding Process parameters
| Number of layers | Welding current (A) | Current (V) | Welding speed | Overlap between |
| 1 | 300～500 | 35～45 | 200-400mm/min | 35～50％ |
| 2 | 300～500 | 35～45 | 200-400mm/min | 35～50％ |
| ≧3 | 300～500 | 35～45 | 200-400mm/min | 35～50％ |
TABLE 2 laser cladding Process parameters
Secondly, it should be noted that: and (3) detecting the surface of the cladding layer by penetration flaw detection and magnetic particle flaw detection during cladding post-treatment without cracks.
Regarding the use effect, taking the tube die of DN800 as an example, the national standard requires that the cast tube quantity before failure is not less than 1200.
The comprehensive comparison shows that the submerged arc surfacing, the laser cladding, the submerged arc reactor and the laser cladding composite remanufacturing technology are compared as follows:
TABLE 1 comparison of three remanufacturing techniques
The embodiment can be used for obtaining that:
the method solves the problems of incompact structure of the surfacing layer, internal pore defect, high dilution rate, easy variability, low mechanical property and the like, and prolongs the service life of the repaired pipe die;
the invention solves the problems of low efficiency, high cost, difficult repair of large-area damaged and thick parts and the like of the laser cladding technology, and can be widely applied to the field of large-scale equipment part remanufacturing;
the invention adopts a mode of combining submerged arc welding and laser cladding, performs bottom layer repair by the submerged arc welding with higher efficiency, performs surface layer repair by adopting a laser cladding technology, improves the performance and the processing efficiency by regulating and controlling a multi-structure microstructure, and optimizes the repair cost on the premise of ensuring the quality.
It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (4)
1. A remanufacturing method of a pipe die based on submerged arc welding and laser cladding is characterized by comprising the following steps: firstly, turning or boring all thermal fatigue cracks, abrasion scratches and high-temperature oxidation fatigue layers on the inner wall of a pipe die, then bottoming by using submerged arc overlaying as a transition layer, tempering the pipe die repaired by overlaying, then processing to be 2-3mm smaller than the diameter of a finished product, then laser cladding a layer of superstrong high-temperature thermal fatigue and high wear resistance cladding layer on the surface of the overlaying by using a laser cladding coaxial powder feeding method, and finally finish machining to a specified size and precision, wherein the specific process steps are as follows:
(1) pre-treating, turning or boring all thermal fatigue layers of the inner wall of the pipe die, including thermal fatigue cracks and crazing, to obtain a smooth inner hole surface;
(2) carrying out magnetic powder inspection or dye-penetrant inspection on the surface of the pipe die to detect whether cracks exist, and if the cracks exist, locally continuing turning or boring until the cracks do not exist;
(3) cleaning the inner wall of the pipe die to ensure that no dirt exists on the surface of the pipe die to be subjected to submerged arc surfacing;
(4) the pipe die is stably placed into a heating furnace for preheating, the preheating temperature is 250-300 ℃, and the preheating and heat preservation time is 3-4 hours;
(5) bottoming a high-toughness transition layer of submerged arc surfacing welding on the inner wall of the pipe die, wherein the size of the surfacing welding is 3-4mm larger than the diameter of a finished pipe die, and controlling the temperature between welding layers to be 200-300 ℃ in the surfacing welding process of the pipe die;
(6) tempering the pipe die repaired by submerged arc overlaying, heating the pipe die to 550-600 ℃ along with a furnace, preserving the heat for 4-6 hours, cooling along with the furnace, cooling the pipe die to the room temperature after the temperature is reduced to below 150 ℃, taking out the pipe die from the furnace, air-cooling the pipe die to the room temperature, and processing the pipe die to the diameter of 2-3mm smaller than the diameter of a finished product;
(7) cleaning the inner wall of the pipe die to ensure that a laser cladding area has no dirt;
(8) carrying out laser cladding strengthening repair on the submerged arc surfacing surface of the pipe die, repairing 3-4 layers of cladding layers with the thickness of 1.0-1.6mm and high-temperature thermal fatigue resistance by laser cladding, and finally carrying out finish machining to specified size and precision;
(9) and finally dotting the inner wall of the inner hole of the pipe die by using a dotting machine tool.
2. The remanufacturing method of the pipe die based on submerged arc welding and laser cladding as claimed in claim 1, wherein: according to the material, performance and thermal expansion coefficient of the pipe die, a submerged arc surfacing transition layer backing welding wire is prepared, and the submerged arc surfacing transition layer backing welding wire comprises the following chemical components in percentage by mass: 0.15-0.25% of C, 0.20-0.40% of Si, 0.30-0.60% of Mn, 2.20-2.60% of Cr, 0.30-0.50% of Mo, less than or equal to 0.50% of Ni and the balance of Fe, wherein the diameter of the welding wire is 3.0-4.0 mm, the flux is 504S type or SJ101 type, and the weight ratio of the welding wire to the flux is 0.8-1.0.
3. The remanufacturing method of the pipe die based on submerged arc welding and laser cladding as claimed in claim 1, wherein: according to the material, performance and thermal expansion coefficient of the transition overlaying layer, blending the components of the laser cladding alloy powder, and determining the mesh number of the alloy powder, wherein the chemical components and the mass fraction of the laser cladding high-temperature-resistant thermal fatigue powder are as follows: 50-55% of Ni, 17-21% of Cr, less than or equal to 0.08% of C, less than or equal to 0.035% of Mn, less than or equal to 0.3% of Cu, less than or equal to 1.0% of Co, 0.2-0.8% of Al, 0.65-1.15% of Ti, 4.75-5.5% of Nb, and the balance of Fe, wherein the powder particle mesh number is 100-300 meshes.
4. The tube die remanufacturing method based on submerged arc welding and laser cladding according to claim 1, wherein the remanufacturing method comprises the following steps: in the steps (1), (5) and (8), the pipe die to be repaired is arranged on an automatic roller frame capable of stepless speed regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619682.9A CN114770028A (en) | 2022-06-01 | 2022-06-01 | Remanufacturing method of pipe mold based on submerged arc welding and laser cladding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619682.9A CN114770028A (en) | 2022-06-01 | 2022-06-01 | Remanufacturing method of pipe mold based on submerged arc welding and laser cladding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114770028A true CN114770028A (en) | 2022-07-22 |
Family
ID=82421212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210619682.9A Pending CN114770028A (en) | 2022-06-01 | 2022-06-01 | Remanufacturing method of pipe mold based on submerged arc welding and laser cladding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114770028A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283869A (en) * | 2022-07-28 | 2022-11-04 | 上海宝冶集团有限公司 | Repair welding method for stainless steel composite plate defect |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104404510A (en) * | 2014-12-10 | 2015-03-11 | 南京中科神光科技有限公司 | Method for restoring cold roll through preparing gradient coating via laser cladding |
| US20150275687A1 (en) * | 2011-01-13 | 2015-10-01 | Siemens Energy, Inc. | Localized repair of superalloy component |
| CN105290703A (en) * | 2015-11-04 | 2016-02-03 | 北京工业大学 | Method for repairing abraded hot roll through submerged arc bead welding and laser cladding |
| CN105441934A (en) * | 2014-08-12 | 2016-03-30 | 宝山钢铁股份有限公司 | Method for welding wearing-resistant layer by laser cladding on roller way roll surface |
| CN109468633A (en) * | 2018-12-03 | 2019-03-15 | 苏常美 | The method that a kind of pair of roll is repaired |
| CN111471993A (en) * | 2020-05-29 | 2020-07-31 | 燕山大学 | Laser cladding repair material for four rollers of sintering four-roller crusher and remanufacturing method |
| CN112475560A (en) * | 2020-11-19 | 2021-03-12 | 黄石市高潮工矿机械有限公司 | Welding flux for repairing pipe die and pipe die repairing method |
| CN113478168A (en) * | 2021-08-09 | 2021-10-08 | 泰尔(安徽)工业科技服务有限公司 | Method for repairing mandrel for rolling seamless steel tube |
| CN114525506A (en) * | 2022-01-07 | 2022-05-24 | 营口裕隆光电科技有限公司 | Method for quickly repairing foot roller of continuous casting machine through alloy powder laser cladding |
-
2022
- 2022-06-01 CN CN202210619682.9A patent/CN114770028A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150275687A1 (en) * | 2011-01-13 | 2015-10-01 | Siemens Energy, Inc. | Localized repair of superalloy component |
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN105441934A (en) * | 2014-08-12 | 2016-03-30 | 宝山钢铁股份有限公司 | Method for welding wearing-resistant layer by laser cladding on roller way roll surface |
| CN104404510A (en) * | 2014-12-10 | 2015-03-11 | 南京中科神光科技有限公司 | Method for restoring cold roll through preparing gradient coating via laser cladding |
| CN105290703A (en) * | 2015-11-04 | 2016-02-03 | 北京工业大学 | Method for repairing abraded hot roll through submerged arc bead welding and laser cladding |
| CN109468633A (en) * | 2018-12-03 | 2019-03-15 | 苏常美 | The method that a kind of pair of roll is repaired |
| CN111471993A (en) * | 2020-05-29 | 2020-07-31 | 燕山大学 | Laser cladding repair material for four rollers of sintering four-roller crusher and remanufacturing method |
| CN112475560A (en) * | 2020-11-19 | 2021-03-12 | 黄石市高潮工矿机械有限公司 | Welding flux for repairing pipe die and pipe die repairing method |
| CN113478168A (en) * | 2021-08-09 | 2021-10-08 | 泰尔(安徽)工业科技服务有限公司 | Method for repairing mandrel for rolling seamless steel tube |
| CN114525506A (en) * | 2022-01-07 | 2022-05-24 | 营口裕隆光电科技有限公司 | Method for quickly repairing foot roller of continuous casting machine through alloy powder laser cladding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283869A (en) * | 2022-07-28 | 2022-11-04 | 上海宝冶集团有限公司 | Repair welding method for stainless steel composite plate defect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105290703B (en) | A kind of method that hot roll is worn with submerged arc overlay welding and laser melting coating reparation | |
| CN105177569B (en) | A kind of nodular cast iron surface laser restorative procedure | |
| CN109468634A (en) | A kind of laser melting and coating technique restores the process of milling train step pad precision | |
| CN102732831B (en) | Laser repairing process for automobile mold | |
| CN105861882B (en) | A kind of laser in combination manufacture special metals powder and its application in hard seal ball valve | |
| CN102189316B (en) | Submerged-arc welding overlaying repairing method for stainless steel hot rolled delivery roll | |
| CN110273155A (en) | A kind of laser cladding reconstructing technique | |
| CN102465290B (en) | Manufacturing method of double-layer metal composite pipe | |
| CN104975288B (en) | A kind of quick reproducing method of pulling-straightening roller | |
| CN107937911B (en) | Method for laser cladding of wear-resistant and impact-resistant coating on surface of cast steel | |
| CN109504966A (en) | A kind of preparation method of cylinder head vermicular cast iron surface abrasion resistance anti-friction coating | |
| CN109706449B (en) | Coating material for repairing main bearing of shield tunneling machine and process method | |
| CN102392243A (en) | Laser surface cladding method of straightening roller | |
| CN104551337A (en) | 30CrMo heat resistant steel pipeline welding construction method | |
| CN110257826A (en) | Grain roll bearing position laser cladding method and laser melting coating alloy powder | |
| CN110592580B (en) | Laser cladding side guide plate and machining method thereof | |
| CN110042390B (en) | Flexible film-pasting laser cladding strengthening method for die-casting die | |
| CN110747458A (en) | Method for repairing crankshaft of hot-rolling fixed-width press | |
| CN109468633B (en) | Method for repairing roller | |
| CN104561994A (en) | Laser surface cladding method for copper roller of metal belt forming machine | |
| CN114770028A (en) | Remanufacturing method of pipe mold based on submerged arc welding and laser cladding | |
| CN102453909A (en) | Method for manufacturing bimetallic composite board | |
| CN103817320A (en) | Cobalt-based composite powder used for restoring rack of rolling mill and method for restoring rack of rolling mill | |
| CN106891107A (en) | Hot rolled seamless steel tube mandrel surface composite-making process method | |
| CN104209639A (en) | Mold cutting edge repair welding process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |