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CN-121988931-A - FeCrNiMoW-based high-entropy alloy wear-resistant surfacing flux-cored wire and preparation method thereof

CN121988931ACN 121988931 ACN121988931 ACN 121988931ACN-121988931-A

Abstract

The invention discloses FeCrNiMoW-based high-entropy alloy wear-resistant surfacing flux-cored wire and a preparation method thereof, and belongs to the technical field of welding materials. The invention aims to form a high-entropy alloy coating with high hardness, excellent wear resistance and corrosion resistance on the surface of a workpiece through a surfacing technology. The invention adopts Fe, cr, ni, mo, W metal elements to construct a high-entropy alloy matrix, has good toughness, corrosion resistance and high-temperature stability, introduces (Nb, ti) C carbide as a reinforcing phase, and improves the hardness and the overall wear resistance of the material on the premise of keeping certain plasticity by utilizing the high-melting point and high-hardness characteristics of the (Nb, ti) C carbide.

Inventors

  • Zhu Houguo
  • DONG TING
  • LI PINXUE
  • HU XIAOBO
  • CHEN PENG
  • LIU MANYU
  • HAN ZHONGYANG
  • CHEN BO
  • JI RONGLIANG
  • SONG CHANGHONG
  • HUO SHUBIN
  • LIU XIN
  • LU JICHAO
  • HU PENGLIANG
  • ZHENG YONGQIANG

Assignees

  • 哈尔滨威尔焊接有限责任公司

Dates

Publication Date
20260508
Application Date
20260401

Claims (10)

  1. 1. A FeCrNiMoW-based high-entropy alloy wear-resistant surfacing flux-cored wire is characterized by comprising, by mass, 0.1% -5% of iron powder, 5% -10% of chromium carbide powder, 10% -25% of nickel powder, 15% -35% of molybdenum powder, 30% -45% of tungsten powder, 0.5% -2% of niobium powder, 0.5% -2% of titanium powder, 0.2% -1% of rutile, 0.2% -1% of fluorite, 0.2% -1% of quartz, 0.2% -1% of silicon-calcium powder, 0.2% -1% of ferromanganese and 100% of the sum of the components.
  2. 2. The welding wire of claim 1 wherein said outer skin is 310 stainless steel.
  3. 3. The welding wire according to claim 1, wherein the core powder comprises, by mass, 0.1% of iron powder, 6% of chromium powder, 5.5% of chromium carbide powder, 18.1% of nickel powder, 24.2% of molybdenum powder, 43.2% of tungsten powder, 0.8% of niobium powder, 0.8% of titanium powder, 0.5% of rutile, 0.2% of fluorite, 0.2% of quartz, 0.2% of calcium silicate powder and 0.2% of ferromanganese.
  4. 4. The welding wire according to claim 1, wherein the particle size of Fe, cr, ni, mo, W elemental powders is controlled to be 80-200 meshes, the mass purity is more than or equal to 99.5%, the particle sizes of Nb powder and Ti powder are 200-325 meshes, the mass purity is more than or equal to 99.5%, the particle size of chromium carbide powder is 200-325 meshes, the mass purity is more than or equal to 99.0%, and the particle sizes of rutile, fluorite, quartz, calcium silicate powder and ferromanganese are 80-200 meshes.
  5. 5. The welding wire according to claim 1, wherein the chemical components of the 310 stainless steel sheath are, by mass, less than or equal to 0.15% of C, less than or equal to 1.00% of Si, less than or equal to 2.00% of Mn, less than or equal to 0.035% of P, less than or equal to 0.030% of S, 24.0% -26.0% of Cr, 19.0% -22.0% of Ni, less than or equal to 0.75% of Mo, and the balance of Fe.
  6. 6. The welding wire of claim 1, wherein the weight of the core powder is 30% -50% of the total mass of the flux-cored wire.
  7. 7. The welding wire of claim 1, wherein the diameter of the welding wire ranges from 1.6 mm to 4.0 mm.
  8. 8. The method of manufacturing a welding wire according to any one of claims 1 to 7, comprising the steps of: Step 1, drying various required raw materials respectively at 480-520 ℃ for at least 2 hours; step2, mixing uniformly to obtain medicinal powder; Step 3, adopting a steel belt method, rolling a 310 stainless steel belt into a U-shaped groove, and continuously and uniformly adding uniformly mixed medicinal powder into the U-shaped groove through a powder feeding device; And 4, closing the U-shaped groove into an O-shaped pipe, and carrying out multi-pass drawing until the diameter reaches the target size.
  9. 9. The method according to claim 8, wherein in the step 2, the filling rate of the powder is controlled to be 30% -50%.
  10. 10. The method according to claim 8, wherein the compression rate of each pass is controlled to be 10% -20% and the drawing speed is controlled to be 1% -3 m/s in the drawing process.

Description

FeCrNiMoW-based high-entropy alloy wear-resistant surfacing flux-cored wire and preparation method thereof Technical Field The invention belongs to the technical field of welding materials, and particularly relates to FeCrNiMoW-base high-entropy alloy wear-resistant surfacing flux-cored wire and a preparation method thereof. Background In the heavy industrial fields of mines, metallurgy, electric power, building materials and the like, various mechanical equipment components (such as crusher hammerheads, grinding rollers, excavator bucket teeth, wear-resistant lining plates and the like) bear high-stress abrasive particle wear and impact wear for a long time, the service life is short, the replacement is frequent, and huge material waste and economic loss are caused. The surface overlaying technology is a main means for prolonging the service life of the component because of being capable of forming a high-performance composite layer on the surface of a cheap substrate. The traditional wear-resistant surfacing materials are mainly divided into two types, namely a high-chromium cast iron series surfacing welding wire, a large amount of M 7C3 carbide is generated to obtain high hardness (about 60-65 HRC), a matrix is martensite or austenite, high-temperature stability is poor, the carbide is easy to peel off under a high-impact working condition, and a WC particle reinforced composite welding wire is excellent in wear resistance but high in cost, and WC particles are easy to react and dissolve with an iron matrix interface, so that the reinforcing effect is reduced. In recent years, high-entropy alloys exhibit superior matrix strength, excellent corrosion resistance, and high-temperature stability than conventional alloys due to their unique "high entropy effect", "lattice distortion effect". Particularly FeCrNiMoW series alloy, which contains Mo, W and other strong solution strengthening elements, shows excellent red hardness and wear resistance and corrosion resistance. The ceramic reinforcing phase is introduced on the basis, so that the strength and the wear resistance of the ceramic reinforcing phase can be further improved. However, the high-entropy alloy block has high preparation cost and high processing difficulty, and limits the application of the high-entropy alloy block in the surface strengthening of large-sized workpieces. Therefore, the flux-cored wire capable of overlaying the high-entropy alloy coating on the conventional material matrix through the conventional overlaying process has extremely high engineering value. Disclosure of Invention The invention aims to form a high-entropy alloy coating with high hardness, excellent wear resistance and corrosion resistance on the surface of a workpiece through a surfacing technology. Provides FeCrNiMoW-base high-entropy alloy wear-resistant surfacing flux-cored wire and a preparation method thereof, so as to realize industrialized stable industrial production. The invention adopts Fe, cr, ni, mo, W metal elements to construct a high-entropy alloy matrix, has good toughness, corrosion resistance and high-temperature stability, introduces (Nb, ti) C carbide as a reinforcing phase, and improves the hardness and the overall wear resistance of the material on the premise of keeping certain plasticity by utilizing the high-melting point and high-hardness characteristics of the (Nb, ti) C carbide. In order to realize the technical problems, the invention adopts the following technical scheme: The invention aims to provide FeCrNiMoW-based high-entropy alloy hardfacing flux-cored wire which consists of a 310 stainless steel sheath (steel belt) and medicinal powder filled in the steel belt. The chemical composition of the powder comprises, by mass, 0.1% -5% of iron powder, 5% -10% of chromium carbide powder, 10% -25% of nickel powder, 15% -35% of molybdenum powder, 30% -45% of tungsten powder, 0.5% -2% of reinforcing phase component, 0.5% -2% of titanium powder, deoxidizing, slagging and arc stabilizing component, 0.2% -1% of rutile, 0.2% -1% of fluorite, 0.2% -1% of quartz, 0.2% -1% of silicon-calcium powder, 0.2% -1% of ferromanganese, and the sum of the components is 100%. Further limiting, the chemical components of the core powder comprise, by weight, 0.1% of iron powder, 6% of chromium powder, 5.5% of chromium carbide powder, 18.1% of nickel powder, 24.2% of molybdenum powder, 43.2% of tungsten powder, 0.8% of niobium powder, 0.8% of titanium powder, 0.5% of rutile, 0.2% of fluorite, 0.2% of quartz, 0.2% of calcium silicate powder and 0.2% of ferromanganese. Further limited, the granularity of Fe, cr, ni, mo, W simple substance powder in the medicinal powder is controlled to be 80-200 meshes, and the purity is more than or equal to 99.5% (mass). Further limited, the granularity of the Nb powder and the Ti powder is 200-325 meshes, and the purity is more than or equal to 99.5% (mass). Further limited, the granularity of the chromium carbide powder is 200