CN111940949A - Surfacing electrode for repairing deep-sea trenching plough and preparation method and use method thereof - Google Patents
Surfacing electrode for repairing deep-sea trenching plough and preparation method and use method thereof Download PDFInfo
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- CN111940949A CN111940949A CN202010787646.4A CN202010787646A CN111940949A CN 111940949 A CN111940949 A CN 111940949A CN 202010787646 A CN202010787646 A CN 202010787646A CN 111940949 A CN111940949 A CN 111940949A
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3602—Carbonates, basic oxides or hydroxides
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention relates to a surfacing welding electrode for repairing a deep-sea furrow plough, which comprises a core wire and a coating, wherein the coating is coated on the periphery of the core wire, the core wire is made of martensitic stainless steel, and the coating comprises the following components in parts by weight: 45-55 parts of marble; 20-30 parts of fluorite; 5-20 parts of ferrotitanium; 4-8 parts of titanium dioxide; 3-5 parts of zircon sand; 3-5 parts of potassium feldspar; 3-6 parts of rare earth silicon. The welding rod takes 1Cr13 martensitic stainless steel as a core wire, rare earth silicon and ferrotitanium are added into a low-hydrogen alkaline coating, and the content of the rare earth silicon and the ferrotitanium is controlled, so that the welding rod has good hardness and wear resistance when surfacing is used for repairing a furrow plough.
Description
Technical Field
The invention relates to a welding rod, in particular to a surfacing welding rod for repairing a deep-sea furrow plough and a preparation method and a use method thereof.
Background
The submarine trencher is mainly used for laying pre-excavated ditches for submarine pipelines and is widely applied to construction projects such as submarine oil gas, communication optical cables and the like. The ditching plow is one of the main function executing mechanisms of the submarine ditcher, and mainly plays a role in cutting sediment on the seabed to form a pipe laying deep ditch, so that the working condition is quite bad. Not only bears the friction of fine sand and pebbles on the seabed for a long time, but also occasionally suffers the impact of giant rocks, gradually generates holes and pits on a plowshare, and finally leads to the failure and the abandonment of the ditching plow. When the digger plough is scrapped, only a small amount of metal material at the edge end is lost, and most of the metal at the joint of the digger plough and the bracket is still in a usable state. The raw material is recycled and re-smelted, so that a large amount of manpower and energy are consumed, and the environment is polluted by stacking and burying. Ocean oil and gas resource development, optical cable communication and even submarine tunnel construction are key projects needing to lay pipelines, the manufacture of the large deep-sea furrow plough is one of domestic research hotspots, and no systematic re-manufacturing method of the furrow plough is provided at present. In view of the fact that the demand of China for the deep-sea furrow plough is only increased and not reduced within a period of time in the future, the wear-resistant welding rod for remanufacturing the deep-sea furrow plough and the remanufacturing method have important research values.
The technique of build-up welding is a conventional but highly efficient remanufacturing process. The method is characterized in that an alloy with properties similar to those of a parent metal or with special properties is deposited on the surface of the parent metal through a certain heat source, so that the appearance of a part is repaired, and the performance of a working end face is enhanced. The deposited alloy layer can be bonded to the base metal on the atomic layer surface by the surfacing method, so that the surfacing layer is not easy to peel off in the use process of the component, and the service life of the component can be prolonged more remarkably compared with non-metallurgical bonding such as paint spraying protection. The remanufacturing resource saving is outstanding, and according to statistics, the remanufacturing can save 60 percent of energy, save 70 percent of materials and only has 50 percent of the remanufacturing cost. Therefore, the deep-sea trenching plough is remanufactured by using the surfacing method, not only accords with the sustainable development concept advocated at present, but also has strong feasibility.
At present, manganese steel is the main material of China for manufacturing deep-sea diggers. For parts made of manganese steel used in wear applications, the metal is usually deposited by manual arc welding using a D276 electrode in a ground pit. The main disadvantage of this process is that the rockwell hardness of manganese steels is very high, at least 40HRC, while the rockwell hardness of D276 overlay alloys is only 21 HRC. The hardness of the deposited alloy layer is not as good as that of the base metal, the wear resistance is greatly different from that of the manganese steel base metal, and the service life of a remanufactured finished part cannot be prolonged remarkably.
Disclosure of Invention
The invention provides a surfacing electrode for repairing a deep-sea furrow plough, aiming at solving the problem of insufficient hardness of the existing surfacing electrode. The welding rod takes 1Cr13 martensitic stainless steel as a core wire, rare earth silicon and ferrotitanium are added into the coating of the welding rod, the content of the rare earth silicon and the ferrotitanium is controlled, and finally, when the welding rod is used for surfacing and repairing the furrow plough, the alloy of the surfacing layer has higher hardness compared with the traditional D267 welding rod, and the purpose of prolonging the service life of the furrow plough is achieved.
In order to solve the problems, the invention adopts the technical scheme that: the surfacing electrode for repairing the deep sea furrow plough comprises a core wire and a coating, wherein the coating is coated on the periphery of the core wire, the core wire is made of martensitic stainless steel, and the coating comprises the following components in parts by weight:
45-55 parts of marble;
20-30 parts of fluorite;
5-20 parts of ferrotitanium;
4-8 parts of titanium dioxide;
3-5 parts of zircon sand;
3-5 parts of potassium feldspar;
3-6 parts of rare earth silicon.
Further, the core wire is 1Cr13 martensitic stainless steel.
Furthermore, the diameter of the core wire is 3.2 or 4mm, and the thickness of the coating is 2-3 mm.
The invention also provides a preparation method of the surfacing electrode for repairing the deep-sea trenching plough, which comprises the following steps
(1) Straightening the core wires, polishing with sand paper to remove rust, cleaning and removing dirt;
(2) weighing the medicinal skin components according to the formula proportion, pouring the medicinal skin components into a mortar, and simultaneously grinding and dry-mixing to obtain dry powder;
(3) adding water glass into the dry powder for wet mixing until the wet powder is uniform in texture;
(4) coating the wet powder material on the surface of the welding core centripetally, and controlling the thickness to be 2-3 mm;
(5) vertically placing the welding rod at room temperature, airing for at least 24 hours, and drying after the coating is shaped;
the coating comprises the following components in parts by mass:
45-55 parts of marble;
20-30 parts of fluorite;
5-20 parts of ferrotitanium;
4-8 parts of titanium dioxide;
3-5 parts of zircon sand;
3-5 parts of potassium feldspar;
3-6 parts of rare earth silicon.
Further, the drying process of the coating is as follows: heating to 100 deg.C, holding for 1hr, heating to 380 deg.C, oven drying for 2 hr, cooling to room temperature, and storing in shade.
Furthermore, the modulus of the water glass is 2.9-3.0, and the Baume degree is 47-48.
The invention also provides a using method of the surfacing welding rod for repairing the deep-sea furrow plough, which is characterized by comprising the following steps of: comprises the following steps
(1) The surface of the ditching plow is cleaned,
(2) adjusting technological parameters of manual arc surfacing, depositing a wear-resistant alloy layer on the surface of the wear trenching plow, and surfacing by adopting a welding rod;
the technological parameters in the step (2) are as follows: the welding current is 120A, the welding voltage is 30-45V, the welding speed is 18-20m/h, and the polarity of the power supply is direct current reverse connection.
Further, the overlapping area of the adjacent welding beads is maintained between 1/3 and 1/2 during multi-pass welding.
Furthermore, the plowshare of the furrow plough is made of manganese steel.
The beneficial effects produced by the invention comprise: the invention overcomes the defect that the difference between the hardness of the common surfacing welding electrode D276 for manganese steel and the base metal is overlarge, selects the low-carbon martensite 1Cr13 with higher hardness as the welding core of the welding electrode, and simultaneously adds a proper amount of rare earth silicon and ferrotitanium into the coating of the welding electrode. The hardness of the surfacing alloy layer is fully improved by utilizing the deformation strengthening effect of Si atoms and the fine grain strengthening effect of Ti elements. The application method provided by the invention is used for depositing the martensitic stainless steel on the surface of the worn deep-sea trenching plow, and compared with the traditional welding material and process, the application method can prolong the whole service life of the parts. Has the advantages of convenient operation, low maintenance cost and excellent wear resistance.
Drawings
FIG. 1 is a schematic view of a welding rod drying temperature;
FIG. 2 is a schematic view of a deep sea trenching plow to be rehabilitated;
FIG. 3 is a schematic view of a welding process;
FIG. 4 is a hardness versus bar graph;
in the figure, 1, a plowshare of the furrow plough, 2, a bracket of the furrow plough, 3, a fastener, 4, a grinding hole, 5, a grinding pit, 6, a conductive worktable, 7, a power supply, 8, the furrow plough, 9, a deposited wear-resistant alloy layer, 10, a welding rod, 101, a welding core, 102, a coating, 11 and a skull.
Detailed Description
The present invention is explained in further detail below with reference to the drawings and the specific embodiments, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Example 1:
table 1: example 1 sampling mass fraction (Zt%)
A surfacing electrode for repairing a deep sea trenching plough comprises the following steps:
(1) straightening 1Cr13 martensitic stainless steel core wires with the diameter of 4mm, polishing with sand paper to remove rust, and cleaning to remove dirt; (2) accurately weighing mineral and alloy powder by using a balance according to the table 1, pouring the powder into a mortar, and simultaneously grinding and dry-mixing the powder until the powder is uniform in texture and consistent in color; (3) adding water glass into the dry powder according to a small amount of method for multiple times for wet mixing until the viscosity of the wet powder is moderate and the texture is uniform. Example 1 preferably has a water glass modulus of 2.9 and a baume degree of 47 to 48. (4) The wet powder is centripetally coated on the surface of the welding core, the thickness is controlled to be 2-3mm, and good concentricity is kept. (5) And (3) vertically placing the welding rod at room temperature, airing for at least 24 hours, and drying after the coating is shaped. Heating to 100 deg.C, keeping the temperature for 1hr, heating to 380 deg.C, oven drying for 2 hr, and cooling to room temperature with the oven, with the oven temperature control curve shown in FIG. 1. And storing the finished welding rod in a shady and dry place.
The worn furrow plough shown in the figure 2 is remanufactured by applying the welding rod provided by the embodiment, and comprises a furrow plough bracket and a furrow plough coulter, wherein the furrow plough coulter is fixed on the furrow plough bracket through a fastener, a grinding pit and a grinding hole are arranged on the furrow plough coulter, and a slag shell generated in the arc welding process of the welding rod floats on the surface of the surfacing alloy layer.
(1) Cleaning the surface of the deep-sea trench plow to be repaired, particularly cleaning accumulated sand in grinding holes and grinding pits, then grinding by using sand paper to remove a paint layer and rust so as to make the surface smooth, and finally cleaning and removing dirt.
(2) And adjusting the welding current to 120A, the welding voltage to 30-45V and the polarity of the power supply to be in direct current reverse connection. Example 1 the preferred welding speed is 20 m/h. The surfacing electrode provided by the invention is used for depositing a wear-resistant alloy layer on the surface of the wear trenching plow by a manual arc surfacing method. A schematic diagram of the welding process is shown in fig. 3. The welding operation specifications that the present invention preferably needs to follow at this step are: welding strictly according to established parameters; the overlapping area of the adjacent welding beads is kept at 1/2 during multi-pass welding; during multilayer and multi-pass welding, slag removal must be done layer by layer to avoid slag inclusion in the layer; the weld bead with obvious defects should be polished to remove and then welded for the next pass. During welding, the ditching plow is arranged on the conductive workbench, and after a direct current power supply is switched on, the welding rod disclosed by the invention is used for surfacing to form a deposited wear-resistant alloy layer.
(3) And machining the postweld furrow plough to enable parameters such as appearance, surface roughness and the like to meet the requirements of subsequent processes.
Example 2:
table 2: example 2 sampling mass fraction (Zt%)
A surfacing electrode for repairing a deep sea trenching plough comprises the following steps:
(1) straightening 1Cr13 martensitic stainless steel core wires with the diameter of 4mm, polishing with sand paper to remove rust, and cleaning to remove dirt; (2) accurately weighing mineral and alloy powder by using a balance according to the table 2, pouring the powder into a mortar, and simultaneously grinding and dry-mixing the powder until the powder is uniform in texture and consistent in color; (3) adding water glass into the dry powder according to a small amount of method for multiple times for wet mixing until the viscosity of the wet powder is moderate and the texture is uniform. Example 1 preferably has a water glass modulus of 2.9 and a baume degree of 47 to 48. (4) The wet powder is centripetally coated on the surface of the welding core, the thickness is controlled to be 2-3mm, and good concentricity is kept. (5) And (3) vertically placing the welding rod at room temperature, airing for at least 24 hours, and drying after the coating is shaped. Heating to 100 deg.C, keeping the temperature for 1hr, heating to 380 deg.C, oven drying for 2 hr, and cooling to room temperature with the oven, with the oven temperature control curve shown in FIG. 1. And storing the finished welding rod in a shady and dry place.
The abrasion furrow plough shown in the figure 2 is remanufactured by applying the welding rod provided by the embodiment, and comprises a furrow plough bracket and a furrow plough coulter, wherein the furrow plough coulter is fixed on the furrow plough bracket through a fastener, and a grinding pit and a grinding hole are arranged on the furrow plough coulter.
(1) Cleaning the surface of the deep-sea trench plow to be repaired, particularly cleaning accumulated sand in grinding holes and grinding pits, then grinding by using sand paper to remove a paint layer and rust so as to make the surface smooth, and finally cleaning and removing dirt.
(2) And adjusting the welding current to 120A, the welding voltage to 30-45V and the polarity of the power supply to be in direct current reverse connection. Example 1 the preferred welding speed is 18 m/h. The surfacing electrode provided by the invention is used for depositing a wear-resistant alloy layer on the surface of the wear trenching plow by a manual arc surfacing method. A schematic diagram of the welding process is shown in fig. 3. The welding operation specifications that the present invention preferably needs to follow at this step are: welding strictly according to established parameters; the overlapping area of the adjacent welding beads is kept at 1/2 during multi-pass welding; during multilayer and multi-pass welding, slag removal must be done layer by layer to avoid slag inclusion in the layer; the weld bead with obvious defects should be polished to remove and then welded for the next pass. During welding, the ditching plow is arranged on the conductive workbench, and after a direct current power supply is switched on, the welding rod disclosed by the invention is used for surfacing to form a deposited wear-resistant alloy layer.
(3) And machining the postweld furrow plough to enable parameters such as appearance, surface roughness and the like to meet the requirements of subsequent processes.
Example 3:
table 3: example 3 sampling mass fraction (Zt%)
A surfacing electrode for repairing a deep sea trenching plough comprises the following steps:
(1) straightening 1Cr13 martensitic stainless steel core wires with the diameter of 4mm, polishing with sand paper to remove rust, and cleaning to remove dirt; (2) accurately weighing mineral and alloy powder by using a balance according to the table 2, pouring the powder into a mortar, and simultaneously grinding and dry-mixing the powder until the powder is uniform in texture and consistent in color; (3) adding water glass into the dry powder according to a small amount of method for multiple times for wet mixing until the viscosity of the wet powder is moderate and the texture is uniform. Example 1 preferably has a water glass modulus of 3.0 and a baume degree of 47 to 48. (4) The wet powder is centripetally coated on the surface of the welding core, the thickness is controlled to be 2-3mm, and good concentricity is kept. (5) And (3) vertically placing the welding rod at room temperature, airing for at least 24 hours, and drying after the coating is shaped. Heating to 100 deg.C, keeping the temperature for 1hr, heating to 380 deg.C, oven drying for 2 hr, and cooling to room temperature with the oven, with the oven temperature control curve shown in FIG. 1. And storing the finished welding rod in a shady and dry place.
The abrasion furrow plough shown in the figure 2 is remanufactured by applying the welding rod provided by the embodiment, and comprises a furrow plough bracket and a furrow plough coulter, wherein the furrow plough coulter is fixed on the furrow plough bracket through a fastener, and a grinding pit and a grinding hole are arranged on the furrow plough coulter.
(1) Cleaning the surface of the deep-sea trench plow to be repaired, particularly cleaning accumulated sand in grinding holes and grinding pits, then grinding by using sand paper to remove a paint layer and rust so as to make the surface smooth, and finally cleaning and removing dirt.
(2) And adjusting the welding current to 120A, the welding voltage to 30-45V and the polarity of the power supply to be in direct current reverse connection. Example 1 the preferred welding speed is 19 m/h. The surfacing electrode provided by the invention is used for depositing a wear-resistant alloy layer on the surface of the wear trenching plow by a manual arc surfacing method. A schematic diagram of the welding process is shown in fig. 3. The welding operation specifications that the present invention preferably needs to follow at this step are: welding strictly according to established parameters; the overlapping area of the adjacent welding beads is kept at 1/2 during multi-pass welding; during multilayer and multi-pass welding, slag removal must be done layer by layer to avoid slag inclusion in the layer; the weld bead with obvious defects should be polished to remove and then welded for the next pass. During welding, the ditching plow is arranged on the conductive workbench, and after a direct current power supply is switched on, the welding rod disclosed by the invention is used for surfacing to form a deposited wear-resistant alloy layer.
(3) And machining the postweld furrow plough to enable parameters such as appearance, surface roughness and the like to meet the requirements of subsequent processes.
Each of the above examples was repeated for 5 sets to obtain the average rockwell hardness of the alloy for each weld overlay set. Finally, comparing the average rockwell hardness of the alloy of each weld overlay group with the rockwell hardness of the alloy of the D276 welding rod weld overlay to obtain a graph 4, wherein the types of the materials corresponding to the numbers in the graph are 1: example 1 weld overlay alloy, 2: example 2 weld overlay alloy, 3: example 3 weld overlay alloy, 4: d276 welding rod overlaying layer alloy, wherein the Rockwell Hardness (HRC) corresponding to each material is 44.2, 46.9, 45.3 and 21 respectively; the comparison results in: compared with a common welding rod, the scheme provided by the invention can obviously improve the hardness of the alloy of the overlaying layer, thereby prolonging the service life of a remanufactured finished product in a wear occasion. Comparing the examples provided by the invention, it can be considered that example 2 in the three examples has the best hardness improvement effect, and technicians can directly select the optimal proportion around the hardness improvement effect in actual operation.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the claimed invention.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the content of the embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the technical scope of the present invention, and any changes and modifications made are within the protective scope of the present invention.
Claims (9)
1. The utility model provides a deep sea ditching plough is restoration with surfacing electrode which characterized in that: the welding wire comprises a welding core and a coating, wherein the coating is coated on the periphery of the welding core, the welding core is martensitic stainless steel, and the coating comprises the following components in parts by mass:
45-55 parts of marble;
20-30 parts of fluorite;
5-20 parts of ferrotitanium;
4-8 parts of titanium dioxide;
3-5 parts of zircon sand;
3-5 parts of potassium feldspar;
3-6 parts of rare earth silicon.
2. The hardfacing electrode for repairing a deep-sea furrow plow according to claim 1, characterized in that: the core wire is 1Cr13 martensitic stainless steel.
3. The hardfacing electrode for repairing a deep-sea furrow plow according to claim 1, characterized in that: the diameter of the core wire is 3.2mm or 4mm, and the thickness of the coating is 2-3 mm.
4. A preparation method of a surfacing electrode for repairing a deep-sea trenching plow is characterized by comprising the following steps: comprises the following steps
(1) Straightening the core wires, polishing with sand paper to remove rust, cleaning and removing dirt;
(2) weighing the medicinal skin components according to the formula proportion, pouring the medicinal skin components into a mortar, and simultaneously grinding and dry-mixing to obtain dry powder;
(3) adding water glass into the dry powder for wet mixing until the wet powder is uniform in texture;
(4) coating the wet powder material on the surface of the welding core centripetally, and controlling the thickness to be 2-3 mm;
(5) vertically placing the welding rod at room temperature, airing for at least 24 hours, and drying after the coating is shaped;
the coating comprises the following components in parts by mass:
45-55 parts of marble;
20-30 parts of fluorite;
5-20 parts of ferrotitanium;
4-8 parts of titanium dioxide;
3-5 parts of zircon sand;
3-5 parts of potassium feldspar;
3-6 parts of rare earth silicon.
5. The method for preparing a surfacing electrode for repairing a deep-sea trenching plow according to claim 1, characterized in that: the drying process of the coating is as follows: heating to 100 deg.C, holding for 1hr, heating to 380 deg.C, oven drying for 2 hr, cooling to room temperature, and storing in shade.
6. The method for preparing a surfacing electrode for repairing a deep-sea trenching plow according to claim 1, characterized in that: the modulus of the water glass is 2.9-3.0, and the Baume degree is 47-48.
7. The use method of the surfacing electrode for repairing the deep-sea furrow plough as defined in claim 1, characterized in that: comprises the following steps
(1) Cleaning the surface of the furrow plough;
(2) adjusting technological parameters of manual arc surfacing, depositing a wear-resistant alloy layer on the surface of the wear trenching plow, and surfacing by adopting a welding rod;
the technological parameters in the step (2) are as follows: the welding current is 120A, the welding voltage is 30-45V, the welding speed is 18-20m/h, and the polarity of the power supply is direct current reverse connection.
8. Use according to claim 6, characterized in that: the overlapping area of the adjacent welding beads is kept between 1/3 and 1/2 during multi-pass welding.
9. Use according to claim 6, characterized in that: the plowshare of the furrow plough is made of manganese steel.
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| CN202010787646.4A CN111940949A (en) | 2020-08-07 | 2020-08-07 | Surfacing electrode for repairing deep-sea trenching plough and preparation method and use method thereof |
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| CN202010787646.4A CN111940949A (en) | 2020-08-07 | 2020-08-07 | Surfacing electrode for repairing deep-sea trenching plough and preparation method and use method thereof |
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| CN104476013A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Tungsten-strengthened wear-resisting surfacing electrode and preparation method thereof |
| CN104476014A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Vanadium-strengthened wear resistant surfacing electrode and preparation method thereof |
| CN104493375A (en) * | 2014-10-31 | 2015-04-08 | 河海大学常州校区 | Titanium-reinforced hardfacing electrode and manufacturing method thereof |
| CN110877170A (en) * | 2019-12-04 | 2020-03-13 | 河海大学常州校区 | Surfacing electrode, preparation method and dredging reamer abrasion repair surfacing method |
-
2020
- 2020-08-07 CN CN202010787646.4A patent/CN111940949A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920407A (en) * | 2010-05-16 | 2010-12-22 | 十堰金科化工有限公司 | Novel alloy tool steel welding electrode |
| CN104476013A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Tungsten-strengthened wear-resisting surfacing electrode and preparation method thereof |
| CN104476014A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Vanadium-strengthened wear resistant surfacing electrode and preparation method thereof |
| CN104493375A (en) * | 2014-10-31 | 2015-04-08 | 河海大学常州校区 | Titanium-reinforced hardfacing electrode and manufacturing method thereof |
| CN110877170A (en) * | 2019-12-04 | 2020-03-13 | 河海大学常州校区 | Surfacing electrode, preparation method and dredging reamer abrasion repair surfacing method |
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Application publication date: 20201117 |