CN113927206A - High-temperature wear resistant surfacing material for pinch roll and surfacing method thereof - Google Patents
High-temperature wear resistant surfacing material for pinch roll and surfacing method thereof Download PDFInfo
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- CN113927206A CN113927206A CN202111437244.2A CN202111437244A CN113927206A CN 113927206 A CN113927206 A CN 113927206A CN 202111437244 A CN202111437244 A CN 202111437244A CN 113927206 A CN113927206 A CN 113927206A
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- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 91
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000010410 layer Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 10
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000011229 interlayer Substances 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003892 spreading Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims 4
- 238000005485 electric heating Methods 0.000 abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 239000006104 solid solution Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical group C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a pinch roll high-temperature wear resistant surfacing material and a surfacing method thereof, wherein the pinch roll high-temperature wear resistant surfacing material comprises the following chemical components in percentage by weight: 0.26-0.30%, Cr: 6.50-7.50%, Ni: 0.80-1.00%, W: 1.60-1.66%, Mo: 0.90-0.96%, V: 0.88 to 0.92%, Mn: 1.62-1.68%, Si: 0.64-0.66% and the balance Fe. The method comprises the steps of uniformly mixing metal powder, uniformly paving the uniformly mixed metal powder on a steel strip, then rolling and drawing to size through bending to form a tubular flux-cored wire, controlling welding and interlayer temperature through an electric heating mode, simultaneously performing surfacing welding by adopting 5 machine heads, ensuring the surfacing quality of a pinch roll, ensuring the uniform hardness of a wear-resistant layer on the surface of the pinch roll, realizing high surfacing efficiency, improving the steel passing amount of the hot-rolled steel strip, and prolonging the service life of the pinch roll.
Description
Technical Field
The invention relates to the technical field of pinch rolls of hot rolling recoiling machines, in particular to a high-temperature wear resistant surfacing material for a pinch roll and a surfacing method thereof.
Background
The pinch roll of hot rolled strip steel recoiling machine is an important equipment on the production line of hot rolled strip steel, and said equipment mainly has the functions of guiding, pinching, straightening and leveling rolled strip. The working temperature of the pinch roll is 500-700 ℃, the surface of the pinch roll is required to bear larger pressure, and the surface of the pinch roll is required to have good thermal fatigue resistance and high-temperature wear resistance. The material for surfacing welding on the surface of the pinch roll at present is not resistant to high temperature abrasion, poor in thermal fatigue performance, uneven in surfacing surface hardness, difficult to guarantee the surfacing surface quality, easy to generate defects of steel adhesion, pits, cracks and the like, easy to influence the surface quality of a hot rolled steel strip, low in surfacing efficiency, and in order to improve the steel passing amount of the pinch roll and prolong the service life of the pinch roll, the invention provides the surfacing welding material for the high temperature abrasion resistance of the pinch roll and the surfacing welding method thereof.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide a high-temperature wear resistant surfacing material for a pinch roll and a surfacing method thereof, which are applied to the field of pinch rolls of hot rolled strip steel recoiling machines. The material has high-temperature wear resistance and thermal fatigue resistance, controls the welding and interlayer temperature in an electric heating mode, adopts 5 machine heads for surfacing simultaneously, can ensure the surfacing quality of the pinch roll, ensures uniform hardness of a wear-resistant layer on the surface of the pinch roll, has high surfacing efficiency, improves the steel passing amount of a hot-rolled steel strip, and prolongs the service life of the pinch roll.
In order to prolong the service life of the pinch roll, improve the excessive steel amount, reduce the defects of steel sticking, pits, cracks and the like of the pinch roll in the use process and influence the surface quality of a hot-rolled steel strip, a certain high-temperature wear resistance and thermal fatigue resistance of a surfacing layer are required, the surfacing layer should have certain elements of Cr, Ni, Mo, W, V and the like, wherein Ni can improve the corrosion resistance, rust resistance and high-temperature fatigue resistance of the surfacing layer, Cr, Mo, W, V and the like in the surfacing layer and C form stable carbides, a large amount of carbides dissolved into a matrix structure in the surfacing process play a solid solution strengthening role, Mo, W and V are dispersed and separated out in a fine carbide form during tempering to play a dispersion strengthening role, and the metallographic structure of the surfacing layer is tempered martensite and has good normal-temperature hardness, red hardness, thermal fatigue resistance and wear resistance.
The mechanism of the chemical components of the surfacing wear-resistant material selected by the invention is as follows:
c: the carbon plays a role in solid solution strengthening in the alloy to form a solid solution carbide cementite structure, so that the hardness and the wear resistance of the surfacing wear-resistant material can be improved.
Cr: chromium has a passivation effect to form a substitutional solid solution, and the chromium element can improve the strength, hardness, corrosion resistance and oxidation resistance.
Ni: the nickel strengthens ferrite, refines and increases pearlite, and improves the strength, fatigue property and corrosion resistance of the wear-resistant alloy.
W: besides forming carbide in steel, tungsten is partially dissolved in iron to form solid solution, and the formed carbide has red hardness, heat resistance and wear resistance.
Mo: can improve the wear resistance and heat strength.
V: vanadium is the most effective element for forming strong carbide, forms high-melting point, high-hardness and high-dispersion carbide, and can improve the wear resistance.
Mn: manganese can strengthen ferrite, perform solid solution strengthening, refine pearlite and improve strength.
Si: silicon can improve the heat resistance and corrosion resistance of the wear-resistant alloy.
In order to solve the technical problem, the invention provides a high-temperature wear resistant surfacing material for a pinch roll, which comprises the following components in percentage by weight: the weight percentage of chemical components of the high-temperature wear resistant surfacing material of the pinch roll is C: 0.26-0.30%, Cr: 6.50-7.50%, Ni: 0.80-1.00%, W: 1.60-1.66%, Mo: 0.90-0.96%, V: 0.88 to 0.92%, Mn: 1.62-1.68%, Si: 0.64-0.66% and the balance Fe. The Rockwell hardness of the high-temperature wear resistant surfacing material is HRC 50.
The surfacing method of the high-temperature wear resistant surfacing material for the pinch roll comprises the following steps: uniformly mixing metal powder of the high-temperature wear resistant surfacing material of the pinch roll, uniformly spreading the uniformly mixed metal powder on a steel strip, drawing the steel strip to the size through bending and rolling, curling a steel plate with the diameter of 0.4mm to form a tubular welding wire, and adding welding powder into the tubular welding wire; the pinch roll (2) is driven by a motor (1) to rotate clockwise in surfacing welding of the pinch roll, a left bearing seat (3) and a right bearing seat (12) support the rotation of the pinch roll, the pinch roll (2) is arranged in a heating furnace (4) to be heated, and the welding temperature and the welding interlayer temperature are controlled; the wear-resistant layer (6) is deposited on the surface of the pinch roll (2), wherein the welding heads 1(7), 2(8), 3(9), 4(10) and 5(11) move from left to right on the slide rail (5) to weld.
As a preferable mode of the above technical solution, the surfacing method of the pinch roll high temperature wear resistant surfacing material provided by the present invention further includes a part or all of the following technical features:
as an improvement of the technical scheme, the preheating temperature of the overlaying welding method is 260-.
The Rockwell hardness of the wear resistant material of the invention is HRC 50.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the surfacing method of the wear-resistant material is simple and practical, 5 welding heads are adopted to move on the slide rail and perform surfacing simultaneously, heating and heat preservation are performed through the electric heating furnace, the temperature of the electric furnace is controlled, the welding temperature and the welding interlayer temperature can be accurately controlled, the welding quality is ensured, after welding is completed, the pinch roll is directly annealed in the electric heating furnace for eliminating welding stress, energy is saved, the efficiency is improved, the hardness of the surfacing wear-resistant surface can be ensured to be uniform, the surface wear-resistant surfacing quality of the pinch roll is ensured, and the service life of the pinch roll is prolonged.
The surfacing wear-resistant material and the surfacing method thereof have the following advantages:
(1) the surfacing wear-resistant material has good high-temperature wear resistance and fatigue resistance, high hardness, Rockwell hardness HRC50, uniform surfacing surface hardness of the pinch roll, and difficulty in occurrence of welding defects such as steel adhesion, cracks and the like.
(2) The invention adopts 5 machine heads for simultaneous welding, can accurately control the welding and interlayer temperature through the electric heating furnace, has high surfacing efficiency and good surface welding quality of the pinch roll, can improve the steel passing amount, prolong the service life of the pinch roll, reduce the maintenance and replacement times of equipment and improve the efficiency.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic view of a weld overlay of a pinch roll of the present invention, wherein 1-motor; 2-pinch roll; 3-a left bearing seat; 4-heating the furnace; 5-a slide rail; 6-overlaying a wear-resistant layer; 7-welding head 1; 8-welding head 2; 9-welding head 3; 10-welding head 4; 11-welding head 5; 12-right bearing seat.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example the principles of the invention.
Fig. 1 shows a schematic diagram of a weld deposit of a pinch roll according to the present invention. The pinch roll is characterized in that a motor (1) drives a pinch roll (2) to rotate clockwise, a left bearing seat (3) and a right bearing seat (12) support the pinch roll (2) to rotate, the pinch roll (2) is installed in a heating furnace (4) to be welded and heated, and a wear-resistant layer (6) is welded on the surface of the pinch roll (2), wherein a welding head (1) (7), a welding head (2) (8), a welding head (3) (9), a welding head (4) (10) and a welding head (5) (11) move from left to right on a sliding rail (5) and are welded simultaneously. The middle of the tubular welding wire is medicinal powder, which is called flux-cored wire for short. The upper surface of the sliding rail is provided with a welding machine head for fixing, and the welding machine head can move on the sliding rail.
The invention discloses a high-temperature wear resistant surfacing material for a pinch roll, which is applied to surfacing by adopting the following method, wherein the surfacing of the pinch roll is mainly realized by driving a pinch roll (2) to rotate clockwise by a motor (1), supporting the rotation of the pinch roll by a left bearing seat (3) and a right bearing seat (12), heating the pinch roll (2) in a heating furnace (4) and controlling the welding temperature and the temperature between welding layers. The wear-resistant layer (6) is deposited on the surface of the pinch roll (2), wherein the welding heads 1(7), 2(8), 3(9), 4(10) and 5(11) move from left to right on the slide rail (5) to weld. The surfacing wear-resistant material disclosed by the invention can be more resistant to high-temperature wear and thermal fatigue, the surfacing surface quality can be ensured by adopting the surfacing method for welding, the surfacing surface hardness is uniform, the welding surface quality is good, the surfacing efficiency is high, the Rockwell hardness HRC50 is mainly adopted, three positions are uniformly distributed on the surface of the pinch roll along the axial direction, and four pinch rolls are arranged on each position along the circumference to meet the requirements.
Example 1
The high-temperature wear-resistant material comprises the following chemical components in percentage by weight: 0.26%, Cr: 6.50%, Ni: 0.80%, W: 1.60%, Mo: 0.90%, V: 0.88%, Mn: 1.62%, Si: 0.64% and the balance Fe.
Uniformly mixing metal powder of the high-temperature wear resistant surfacing material of the pinch roll, uniformly spreading the uniformly mixed metal powder on a steel strip, drawing the steel strip to the size through bending and rolling, curling a steel plate with the diameter of 0.4mm to form a tubular welding wire, and adding welding powder into the tubular welding wire; the pinch roll (2) is driven by a motor (1) to rotate clockwise in surfacing welding of the pinch roll, a left bearing seat (3) and a right bearing seat (12) support the rotation of the pinch roll, the pinch roll (2) is arranged in a heating furnace (4) to be heated, and the welding temperature and the welding interlayer temperature are controlled; the wear-resistant layer (6) is deposited on the surface of the pinch roll (2), wherein the welding heads 1(7), 2(8), 3(9), 4(10) and 5(11) move from left to right on the slide rail (5) to weld. The preheating temperature of the overlaying welding method is 260-300 ℃, the temperature between overlaying welding layers is 260-320 ℃, the current of the overlaying welding is 450-550A, the voltage is 28-32V, and the welding speed is 400-500 mm/min.
Example 2
The high-temperature wear-resistant material comprises the following chemical components in percentage by weight: 0.25%, Cr: 6.00%, Ni: 0.70%, W: 1.50%, Mo: 0.80%, V: 0.80%, Mn: 1.50%, Si: 0.60% and the balance Fe.
Uniformly mixing metal powder of the high-temperature wear resistant surfacing material of the pinch roll, uniformly spreading the uniformly mixed metal powder on a steel strip, drawing the steel strip to the size through bending and rolling, curling a steel plate with the diameter of 0.4mm to form a tubular welding wire, and adding welding powder into the tubular welding wire; the pinch roll (2) is driven by a motor (1) to rotate clockwise in surfacing welding of the pinch roll, a left bearing seat (3) and a right bearing seat (12) support the rotation of the pinch roll, the pinch roll (2) is arranged in a heating furnace (4) to be heated, and the welding temperature and the welding interlayer temperature are controlled; the wear-resistant layer (6) is deposited on the surface of the pinch roll (2), wherein the welding heads 1(7), 2(8), 3(9), 4(10) and 5(11) move from left to right on the slide rail (5) to weld. The preheating temperature of the overlaying welding method is 260-300 ℃, the temperature between overlaying welding layers is 260-320 ℃, the current of the overlaying welding is 450-550A, the voltage is 28-32V, and the welding speed is 400-500 mm/min.
Example 3
The high-temperature wear-resistant material comprises the following chemical components in percentage by weight: 0.35%, Cr: 8.00%, Ni: 1.20%, W: 1.70%, Mo: 1.00%, V: 1.00%, Mn: 1.75%, Si: 0.70% and the balance Fe.
Uniformly mixing metal powder of the high-temperature wear resistant surfacing material of the pinch roll, uniformly spreading the uniformly mixed metal powder on a steel strip, drawing the steel strip to the size through bending and rolling, curling a steel plate with the diameter of 0.4mm to form a tubular welding wire, and adding welding powder into the tubular welding wire; the pinch roll (2) is driven by a motor (1) to rotate clockwise in surfacing welding of the pinch roll, a left bearing seat (3) and a right bearing seat (12) support the rotation of the pinch roll, the pinch roll (2) is arranged in a heating furnace (4) to be heated, and the welding temperature and the welding interlayer temperature are controlled; the wear-resistant layer (6) is deposited on the surface of the pinch roll (2), wherein the welding heads 1(7), 2(8), 3(9), 4(10) and 5(11) move from left to right on the slide rail (5) to weld. The preheating temperature of the overlaying welding method is 260-300 ℃, the temperature between overlaying welding layers is 260-320 ℃, the current of the overlaying welding is 450-550A, the voltage is 28-32V, and the welding speed is 400-500 mm/min.
TABLE 1 discussion of the results of the examples
| Example 1 | Example 2 | Example 3 | |
| Rockwell Hardness (HRC) | 50 | 43 | 58 |
| Hardness of surface of build-up welding | Uniform hardness | Low hardness | Too high hardness |
| Surface quality | Wear-resistant and corrosion-resistant | Is not wear-resistant and is easy to rust | Crack defect |
The raw materials listed in the invention, the upper and lower limits and interval values of the raw materials of the invention, and the upper and lower limits and interval values of the process parameters (such as temperature, time and the like) can all realize the invention, and the examples are not listed.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (3)
1. The high-temperature wear resistant surfacing material for the pinch roll is characterized in that: the weight percentage of chemical components of the high-temperature wear resistant surfacing material of the pinch roll is C: 0.26-0.30%, Cr: 6.50-7.50%, Ni: 0.80-1.00%, W: 1.60-1.66%, Mo: 0.90-0.96%, V: 0.88 to 0.92%, Mn: 1.62-1.68%, Si: 0.64-0.66% of Fe in balance; the Rockwell hardness of the high-temperature wear resistant surfacing material is HRC 50.
2. The bead welding method of the pinch roll high-temperature wear resistant bead welding material according to claim 1, characterized by comprising the following steps of: uniformly mixing metal powder of the high-temperature wear resistant surfacing material of the pinch roll, uniformly spreading the uniformly mixed metal powder on a steel strip, drawing the steel strip to the size through bending and rolling, curling a steel plate with the diameter of 0.4mm to form a tubular welding wire, and adding welding powder into the tubular welding wire; the pinch roll (2) is driven by a motor (1) to rotate clockwise in surfacing welding of the pinch roll, a left bearing seat (3) and a right bearing seat (12) support the rotation of the pinch roll, the pinch roll (2) is arranged in a heating furnace (4) to be heated, and the welding temperature and the welding interlayer temperature are controlled; the wear-resistant layer (6) is deposited on the surface of the pinch roll (2), wherein the welding heads 1(7), 2(8), 3(9), 4(10) and 5(11) move from left to right on the slide rail (5) to weld.
3. The bead welding method of the pinch roll high-temperature wear resistant bead welding material according to claim 2, characterized by comprising the following steps: the preheating temperature of the overlaying welding method is 260-300 ℃, the temperature between overlaying welding layers is 260-320 ℃, the current of the overlaying welding is 450-550A, the voltage is 28-32V, and the welding speed is 400-500 mm/min.
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| CN202111437244.2A CN113927206A (en) | 2021-11-30 | 2021-11-30 | High-temperature wear resistant surfacing material for pinch roll and surfacing method thereof |
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|---|---|---|---|---|
| CN114571031A (en) * | 2022-04-12 | 2022-06-03 | 福建鼎信科技有限公司 | 430 stainless steel hot-rolled conveying roller and surfacing method thereof |
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Application publication date: 20220114 |