CN115341124A - Alloy powder for coating surface of stirring head - Google Patents

Alloy powder for coating surface of stirring head Download PDF

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Publication number
CN115341124A
CN115341124A CN202210934755.3A CN202210934755A CN115341124A CN 115341124 A CN115341124 A CN 115341124A CN 202210934755 A CN202210934755 A CN 202210934755A CN 115341124 A CN115341124 A CN 115341124A
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CN
China
Prior art keywords
alloy powder
coating
stirring
stirring head
weight
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
Application number
CN202210934755.3A
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Chinese (zh)
Inventor
徐安莲
唐远金
杜彦斌
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Jiangsu Liutai Welding Technology Co ltd
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Jiangsu Liutai Welding Technology Co ltd
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Filing date
Publication date
Application filed by Jiangsu Liutai Welding Technology Co ltd filed Critical Jiangsu Liutai Welding Technology Co ltd
Priority to CN202210934755.3A priority Critical patent/CN115341124A/en
Publication of CN115341124A publication Critical patent/CN115341124A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/06—Applying particulate materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • 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
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129—Flame spraying

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention relates to the technical field of stirring heads for friction stir welding, and discloses alloy powder for coating the surface of a stirring head. The alloy powder comprises the following raw materials in percentage by weight: the alloy powder for coating the surface of the stirring head comprises the following raw materials in percentage by weight: 5.1 to 10wt% of W, 2 to 8wt% of V, 1 to 5wt% of Sb, 0.5 to 5.5wt% of in, 0.1 to 0.95wt% of Co, 0.1 to 0.95wt% of Zr, 0.1 to 0.5wt% of Si, 0.51 to 0.8wt% of B, 0.61 to 0.85wt% of C, 0.1 to 11wt% of VN, 0.1 to 1wt% of NbC, and the balance of Mo. After the alloy powder is used for coating the surfaces of the stirring pin and the shaft shoulder of the stirring head of the friction stir welding, the high-temperature wear resistance of the stirring pin and the shaft shoulder can be obviously improved, so that the service life of the stirring head is prolonged, the production efficiency of enterprises is improved, and the production cost of the enterprises is reduced.

Description

Alloy powder for coating surface of stirring head
Technical Field
The invention relates to the technical field of stirring heads for friction stir welding, in particular to alloy powder for coating the surface of a stirring head.
Background
The stirring head is the key of friction stir welding technology and is known as the heart of friction stir welding. The quality of the stir head determines not only the performance of the friction stir weld joint, but also the cost of the friction stir weld. The stirring head consists of a shaft shoulder, a clamping part and a stirring pin. In the friction stir welding process, a stirring pin is inserted into a joint interface of welded materials in a rotating manner and advances along a welding seam at a certain speed. Therefore, the stirring head has higher working temperature, worse working environment and high requirement on high-temperature wear performance in the friction stir welding process. Surface coating is an effective way to improve the high-temperature wear performance of the stirring head.
Chinese patent application No. CN201510485188.8 discloses a method and a device for improving surface performance of copper alloy, which substantially comprises the steps of heating the surface of copper alloy in vacuum, stirring and extruding the heated surface of copper alloy by a friction stir processing surface technology to form a hardened layer to improve the surface performance of copper alloy, and realizing a stirring and milling combined processing method by a special stirring head, thereby ensuring the processing quality of the surface and greatly improving the processing efficiency. And finally, putting the workpiece with the processed surface on a grinding mechanism for grinding processing to obtain a smoother copper alloy surface. The stirring head is provided with a blade, the surface of the blade is provided with a wear-resistant material layer, and the stirring head mainly comprises the following components: 20-30% of iron, 10-15% of titanium, 5-10% of cobalt, 40-60% of tungsten, 5-10% of vanadium, 10-25% of nickel and 1% of trace rare earth elements. However, the wear-resistant material layer is provided on the blade and is not used for coating the surface of the pin of the friction stir welding tool.
Disclosure of Invention
In order to solve the technical problem, the invention provides alloy powder for coating the surface of a stirring head. The mixing head generally comprises four parts, namely a mixing pin, a shaft shoulder, a transition end and a clamping end. After the alloy powder is used for coating the surfaces of the stirring pin and the shaft shoulder of the stirring head, the wear resistance of the stirring pin and the shaft shoulder under the high-temperature condition can be obviously improved, so that the service life of the stirring head is prolonged, the production efficiency of an enterprise is improved, and the production cost of the enterprise is reduced.
The specific technical scheme of the invention is as follows: the alloy powder for coating the surface of the stirring head comprises the following raw materials in percentage by weight: 5.1 to 10wt% of W, 2 to 8wt% of V, 1 to 5wt% of Sb, 0.5 to 5.5wt% of in, 0.1 to 0.95wt% of Co, 0.1 to 0.95wt% of Zr, 0.1 to 0.5wt% of Si, 0.51 to 0.8wt% of B, 0.61 to 0.85wt% of C, 0.1 to 11wt% of VN, 0.1 to 1wt% of NbC, and the balance of Mo.
The invention strictly regulates and controls the content of each element in the alloy powder, and after the alloy powder is used for coating the surfaces of the stirring needle and the shaft shoulder of the stirring head in an electrostatic spraying, flame spraying or laser cladding mode, the wear resistance of the stirring needle and the shaft shoulder at room temperature and high temperature can be obviously improved, thereby prolonging the service life of the stirring head. Wherein, in the alloy powder:
the main role of molybdenum (Mo) is to improve strength and creep resistance under high temperature conditions.
The main function of tungsten (W) is to increase hardness and improve wear resistance.
The main function of vanadium (V) is to improve strength, toughness and wear resistance.
The main function of antimony (Sb) is to improve high temperature wear resistance.
The main role of indium (In) is to improve toughness.
The main role of cobalt (Co) and zirconium (Zr) is to achieve grain boundary strengthening.
The main functions of the silicon (Si) and the boron (B) are to be used as a deoxidizer and a self-fluxing agent on one hand, and to improve the wettability; on the other hand, the hardness and the wear resistance are improved through solid melt strengthening and dispersion strengthening.
The carbon (C) mainly has the function of obtaining high-hardness carbide, forming a dispersion strengthening phase and further improving the wear resistance of the surface coating.
The main functions of Vanadium Nitride (VN) and niobium carbide (NbC) are to increase hardness and improve high-temperature wear resistance.
Preferably, the stirring head for surface coating of the alloy powder is made of tool steel, die steel, high-speed steel, high-temperature alloy and hard alloy.
More preferably, the stirring head for surface coating of the alloy powder is made of hot-work die steel, tungsten-rhenium alloy and tungsten carbide-cobalt hard alloy.
Preferably, the alloy powder is used for surface coating of a stirring pin and a shaft shoulder of a stirring head by means of electrostatic spraying, flame spraying or laser welding.
More preferably, the alloy powder is coated on the surface of the stirring pin and the shaft shoulder of the stirring head in a laser welding mode.
Preferably, the vanadium nitride of the alloy powder is nano vanadium nitride or micro vanadium nitride with the particle size of 20 micrometers or less.
Preferably, the vanadium nitride of the alloy powder is nano niobium carbide or micro niobium carbide with a diameter of 20 micrometers or less.
Compared with the prior art, the invention has the beneficial effects that: after the alloy powder is used for coating the surfaces of the stirring pin and the shaft shoulder of the friction stir welding stirring head, the high-temperature wear resistance of the stirring pin and the shaft shoulder can be obviously improved, so that the service life of the stirring head is prolonged, the production efficiency of an enterprise is improved, and the production cost of the enterprise is reduced.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The alloy powder for coating the surface of the stirring head comprises the following raw materials in percentage by weight: 5.1wt% W, 2wt% V, 1wt% Sb, 0.5wt% in, 0.1wt% Co, 0.1wt% Zr, 0.1wt% Si, 0.51wt% B, 0.61wt% C, 0.1wt% VN, 0.1wt% NbC, the balance Mo.
Example 2
The alloy powder for coating the surface of the stirring head comprises the following raw materials in percentage by weight: 10wt% of Sb, 8wt%, 5.5wt% of in, 0.95wt% Co, 0.95wt% of Zr, 0.5wt% of Si, 0.8wt% of B, 0.85wt% of C, 1wt% of VN, 1wt% of NbC, the balance of Mo.
Example 3
The alloy powder for coating the surface of the stirring head comprises the following raw materials in percentage by weight: 0.6wt% of Sb, 4wt% of in, 0.6wt% of Co, 0.4wt% of Zr, 0.3wt% of Si, 0.65wt% of B, 0.7wt% of C, 0.5wt% of VN, 0.1 to 1wt% of NbC, and the balance of Mo.
Example 4
The alloy powder for coating the surface of the stirring head comprises the following raw materials in percentage by weight: 8.3wt% W, 5.6wt% V, 3.8wt% Sb, 4.2wt% in, 0.85wt% Co, 0.7wt% Zr, 0.35wt% Si, 0.65wt% B, 0.7wt% C, 0.6wt% VN, 0.6wt% NbC, the balance Mo.
The alloy powder for surface coating of a stirring head of examples 1 to 4 was subjected to laser cladding surface coating on the stirring pin and the shaft shoulder of a stirring head of H13 hot-work die steel, followed by performance testing. The laser cladding is carried out on a HUST-JKR5170 type laser processing system, and the main process parameters are as follows: the diameter of a light spot is 2.2mm, the gas flow is 12L/min, the lap joint rate is 30%, the laser power is 2.5kW, and the scanning speed is 5mm/s. The probe and the shoulder, which were respectively subjected to the laser cladding treatment of the alloy powders of examples 1 to 4, and the probe and the shoulder, which were not subjected to the laser cladding treatment, were subjected to a 500 ℃ high-temperature frictional wear test on the same frictional wear testing machine. Main parameters of the frictional wear test: the abrasion rotating speed is 2000r/min, the abrasion time is 15min, the relative sliding speed is 90mm/min, the counter-abrasion material is the stirring pin body material, and dry grinding is carried out. The results of the comparison of the test data are shown in the table:
examples Relative abrasion resistance under 500 ℃ test condition
Sample before laser cladding treatment 1
Sample treated by laser cladding in example 1 1.19
Sample treated by laser cladding according to example 2 1.38
Sample treated by laser cladding according to example 3 1.51
Sample treated by laser cladding of example 4 1.67
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modifications, alterations and equivalent changes made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (9)

1. The alloy powder for coating the surface of the stirring head is characterized by comprising the following raw materials in percentage by weight: 5.1 to 10wt% of W, 2 to 8wt% of V, 1 to 5wt% of Sb, 0.5 to 5.5wt% of in, 0.1 to 0.95wt% of Co, 0.1 to 0.95wt% of Zr, 0.1 to 0.5wt% of Si, 0.51 to 0.8wt% of B, 0.61 to 0.85wt% of C, 0.1 to 111wt% of VN, 0.1 to 11wt% of NbC, and the balance of Mo.
2. The alloy powder for coating the surface of the stirring head as recited in claim 1, which is characterized by comprising the following raw materials by weight percent: (ii) the% by weight of W of 6 to 9wt%, the% by weight of V of 3 to 7wt%, the% by weight of Sb of 1.5 to 4.5wt%, the% by weight of in of 1 to 5wt%, the% by weight of Co of 0.2 to 0.85wt%, the% by weight of Zr of 0.2 to 0.4wt%, si of 0.6 to 0.75wt%, B of 0.65 to 0.8wt%, VN of 0.2 to 0.9wt%, nbC of 0.2 to 0.9wt%, and the balance Mo.
3. The alloy powder for coating the surface of the stirring head as recited in claim 2, which is composed of the following raw materials by weight: 6.5 to 8.5wt%, 4.5 to 6.5wt%, 2 to 4wt% Sb, 2 to 4wt% in, 0.3 to 0.7wt% Co, 0.3 to 0.7wt% Zr, 0.25 to 0.35wt% Si, 0.65 to 0.7wt% B, 0.7 to 0.75wt% C, 0.3 to 0.8wt% VN, 0.3 to 0.8wt% NbC, and the balance Mo.
4. An alloy powder for coating the surface of a stirring rod as claimed in claim 1, wherein the stirring rod for coating the surface with the alloy powder is made of tool steel, die steel, high-speed steel, high-temperature alloy and hard alloy.
5. An alloy powder for surface coating of stirring tip as claimed in claim 4, wherein the stirring tip for surface coating of said alloy powder is made of hot work die steel, tungsten-rhenium alloy, tungsten carbide-cobalt hard alloy.
6. The alloy powder for surface coating of a stirring head according to claim 1, wherein the alloy powder is used for surface coating of a stirring pin and a shaft shoulder of a stirring head by means of electrostatic spraying, flame spraying or laser deposition.
7. The alloy powder for stir head surface coating according to claim 6 wherein the alloy powder is surface-coated on the pin and shoulder of the stir head by laser welding.
8. The alloy powder for coating the surface of the stirring head as recited in claim 1, wherein the vanadium nitride of the alloy powder is nano vanadium nitride or micro vanadium nitride of 20 μm or less.
9. The alloy powder for coating the surface of a stirring head as recited in claim 1, wherein the vanadium nitride of the alloy powder is nano niobium carbide or micro niobium carbide of 20 μm or less.
CN202210934755.3A 2022-08-04 2022-08-04 Alloy powder for coating surface of stirring head Pending CN115341124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210934755.3A CN115341124A (en) 2022-08-04 2022-08-04 Alloy powder for coating surface of stirring head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210934755.3A CN115341124A (en) 2022-08-04 2022-08-04 Alloy powder for coating surface of stirring head

Publications (1)

Publication Number Publication Date
CN115341124A true CN115341124A (en) 2022-11-15

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Country Status (1)

Country Link
CN (1) CN115341124A (en)

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