CN113369543B - Wear-resistant alloy coating drill bit and preparation method thereof - Google Patents

Wear-resistant alloy coating drill bit and preparation method thereof Download PDF

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Publication number
CN113369543B
CN113369543B CN202110426454.5A CN202110426454A CN113369543B CN 113369543 B CN113369543 B CN 113369543B CN 202110426454 A CN202110426454 A CN 202110426454A CN 113369543 B CN113369543 B CN 113369543B
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Prior art keywords
drill bit
groove
cone
wear
parts
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CN113369543A (en
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胡筱
嵇建斌
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Zunyi Zhongbo Cemented Carbide Co ltd
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Zunyi Zhongbo Cemented Carbide Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • 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
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
    • 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
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention discloses a wear-resistant alloy coating drill bit and a preparation method thereof, belonging to the technical field of hard alloy and drill bits and comprising a drill bit body, wherein the front end of the drill bit body is in a cone shape, hard alloy teeth are arranged at the top end of the cone, a spiral groove is arranged on the side surface of the cone of the drill bit body, the included angle between the groove and the axis of the drill bit is 78-85 degrees, the width of the groove is 2.2-3.5 mm, the interval between the grooves is 11-17.5 mm, and the depth of the groove is 0.5-0.8 mm; and the side face of the cone of the drill bit body is provided with a hard alloy wear-resistant coating. The drill bit with the wear-resistant alloy coating is provided with a spiral groove on the side surface of the drill bit, and then the supersonic spraying technology is adopted to carry out hot-melt spraying on alloy powder on the surface of the drill bit to form a wear-resistant layer with inconsistent depth and thickness. The durability of the alloy drill bit can be increased, and the service life is obviously prolonged.

Description

Wear-resistant alloy coating drill bit and preparation method thereof
Technical Field
The invention relates to the field of hard alloy and drill bits, in particular to a wear-resistant alloy coating drill bit and a preparation method thereof.
Background
The hard alloy is an alloy material with a series of excellent properties of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly the high hardness and wear resistance of the hard alloy are basically kept unchanged even at the temperature of 500 ℃, and the hard alloy still has high hardness at the temperature of 1000 ℃.
Cemented carbide is widely used as a tool material, such as turning tools, milling cutters, planing tools, drill bits, boring tools and the like, for cutting cast iron, nonferrous metals, plastics, chemical fibers, graphite, glass, stone and common steel, and also for cutting refractory steel, stainless steel, high manganese steel, tool steel and other materials which are difficult to process.
In order to further improve the hardness and wear resistance of cutter materials such as drill bits and the like, a method of spraying a hard alloy coating on the surface of the cutter materials can be adopted to improve the hardness and wear resistance of the material surface.
Disclosure of Invention
The invention aims to further improve the hardness and the wear resistance of a drill bit and provides a wear-resistant alloy coating drill bit and a preparation process method of the drill bit.
In order to achieve the purpose, the technical scheme is as follows:
a wear-resistant alloy coating drill bit comprises a drill bit body, wherein the front end of the drill bit body is in a cone shape, hard alloy teeth are arranged at the top end of the cone, spiral grooves are formed in the side face of the cone of the drill bit body, the included angle between each groove and the axis of the drill bit is 78-85 degrees, the width of each groove is 2.2-3.5 millimeters, the interval between each groove is 11-17.5 millimeters, and the depth of each groove is 0.5-0.8 millimeter; and the side face of the cone of the drill bit body is provided with a hard alloy wear-resistant coating.
Further, the contained angle of the groove of drill bit body cone side and drill bit axis is 82 degrees, the groove width is 2.8 millimeters, the interval in groove is 14 millimeters, the degree of depth in groove is 0.6 millimeters.
The preparation method of the wear-resistant alloy coating drill bit comprises the following steps:
1) The side surface of the drill cone is provided with the spiral groove;
2) Cleaning the drill bit and removing oil stains;
3) Sand blasting by a drill to roughen the surface;
4) Spray coating, drying the alloy powder, and spray coating with supersonic flame spraying equipment, wherein the spray coating distance is 210-280mm, the oxygen-kerosene flame speed is 1600-1800m/s, the nitrogen powder feeding speed is 32-36g/min, the drill bit moving speed is 0.25-0.35m/s, and the number of spray coating layers is 38-48; the alloy powder comprises the following components in parts by mass: 32-42 parts of Cr2C, 21-28 parts of NiCr, 5-12 parts of WC, 5-10 parts of TaC, 3-5 parts of Co and 3-5 parts of Fe;
5) Cooling, namely putting the sprayed drill bit into a cooling box for cooling;
6) And polishing, namely polishing the cooled drill bit to be smooth and clean.
The beneficial effect who adopts above-mentioned scheme does: the drill bit with the wear-resistant alloy coating is provided with a spiral groove on the side surface of the drill bit, and then the supersonic spraying technology is adopted to carry out hot-melt spraying on alloy powder on the surface of the drill bit to form a wear-resistant layer with inconsistent depth and thickness. The durability of the alloy drill bit can be increased, and the service life is obviously prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a wear-resistant alloy coated drill bit according to the present invention.
In the figure, the hard alloy tooth-1, the wear-resistant coating-2, the drill bit body-3, the clamping ring-4 and the drill bit handle-5.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention. The described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the wear-resistant alloy coated drill bit comprises a drill bit body 3, wherein the front end of the drill bit body 3 is in a cone shape, hard alloy teeth 1 are arranged at the top end of the cone, a drill bit handle part 5 is arranged on the lower side of the drill bit body 3, and a clamping ring 3 of the drill bit is arranged on the drill bit handle part 5.
The side face of the cone of the drill bit body 3 is provided with spiral grooves, the included angle between each groove and the axis of the drill bit is 78-85 degrees, the width of each groove is 2.2-3.5 millimeters, the interval between the grooves is 11-17.5 millimeters, and the depth of each groove is 0.5-0.8 millimeter; and the side face of the cone of the drill bit body is provided with a hard alloy wear-resistant coating 2.
The preparation method of the wear-resistant alloy coating drill bit comprises the following steps:
1) The side surface of the drill cone is provided with the spiral groove;
2) Cleaning the drill bit and removing oil stains;
3) Sand blasting by a drill to roughen the surface;
4) Spraying, wherein the drill bit is preheated to 60-80 ℃ before spraying, the alloy powder is dried at about 50 ℃, and the spraying is carried out by using supersonic flame spraying equipment, wherein the spraying distance is 210-280mm, the oxygen-kerosene flame speed is 1600-1800m/s, the nitrogen powder feeding speed is 32-36g/min, the drill bit moving speed is 0.25-0.35m/s, and the number of sprayed layers is 38-48; the alloy powder comprises the following components in parts by mass: 32-42 parts of Cr2C, 21-28 parts of NiCr, 5-12 parts of WC, 5-10 parts of TaC, 3-5 parts of Co and 3-5 parts of Fe; the powder fineness is 220-350 meshes, the mixture is uniform, the fluidity is about 100s/50g, and no oxidation and oil stain are generated. The fixed spray gun is adopted, the drill bit rotates and moves up and down, spraying is started from the front end of the drill bit, the spraying is circularly carried out for 38-48 times, and the average thickness of the coating is 380-520 mu m.
5) Cooling, namely putting the sprayed drill bit into a cooling box for cooling; the air of the cooling box needs to be dehumidified, and the humidity is kept to be about 5% -8%.
6) And polishing, namely polishing the cooled drill bit to be smooth and clean.
The hard alloy thermal spraying coating can obviously increase the wear resistance of the surface of the drill bit, and the supersonic flame spraying is adopted to prepare the carbide-based cermet coating, so that most of carbide hard phases are retained, and the obtained coating has low porosity, high hardness and good wear resistance. The invention relates to a novel thermal spraying technology invented in the United states in 1981, and the core of a supersonic flame spraying device is a spray gun which consists of a combustion chamber, a nozzle and a long spray pipe with an equal section.
In this embodiment, the side of the bit will have 10-15% more coating thickness due to the grooves, and the bit will have inconsistent side wear during use. The drill bit destructive force can be further increased. When a particularly hard obstacle is met, the drill bit can rotate by utilizing the spiral shape, so that the service life of the drill bit is prolonged, and the rejection rate of the drill bit in use is reduced.
The drill bit prepared in example 1 was tested to determine the following parameters: the wear resistance can be improved by 50-80 hours, and the service life of the drill bit is prolonged by 15-25%.
Example 2
On the basis of embodiment 1, the included angle between the grooves on the side face of the drill bit cone and the axis of the drill bit is 82 degrees, the width of the grooves is 2.8 millimeters, the interval between the grooves is 14 millimeters, and the depth of the grooves is 0.6 millimeter. The composition of the sprayed hard alloy coating was as follows: cr (chromium) component 2 C 3 36.5 parts of NiCr 25.8 parts of WC8.3 parts, taC 7.6 parts, co 4.1 parts and Fe 4.5 parts. In the spraying step, the spraying distance is 260mm, the oxygen-kerosene flame speed is 1700m/s, the nitrogen powder feeding speed is 33g/min, the drill bit moving speed is 0.28m/s, and the number of sprayed layers is 42.
The drill bit prepared in example 2 was tested: the bonding strength of the coating is obviously improved to 74MPa, the wear resistance of the coating is more than 200 hours, the porosity is 1.2 percent, and the hardness HV0.3 of the coating is more than 1000. The wear resistance strength of the drill bit can be improved by over 75 hours, and the service life of the drill bit is prolonged by over 20 percent.
Comparative example 3
On the basis of the embodiment 2, the included angle between the groove and the axis of the drill is set to be 84-90 degrees, the groove mark tends to be horizontal, the destructive force of the drill is reduced, the rotating force of the drill is reduced, and the groove mark effect on the side surface of the drill is obviously reduced. Tests show that the wear resistance of the drill bit is only improved by less than 20 hours, and the service life of the drill bit is improved by less than 8%.
Comparative example 4
On the basis of the embodiment 2, the included angle between the groove and the axis of the drill is set to be 75-0 degrees, the groove mark tends to be vertical, the destructive power of the drill is increased, the interference effect of the groove mark on the side surface of the drill is strong, and the alloy coating is easy to fall off. Tests prove that the service life of the drill bit is not obviously prolonged, and the drill bit is easy to damage, so that the service life is shortened.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (2)

1. The preparation method of the wear-resistant alloy coating drill bit comprises a drill bit body, wherein the front end of the drill bit body is in a cone shape, and hard alloy teeth are arranged at the top end of the cone, and the preparation method is characterized in that: the side face of the cone of the drill bit body is provided with spiral grooves, the included angle between each groove and the axis of the drill bit is 78-85 degrees, the width of each groove is 2.2-3.5 millimeters, the interval between the grooves is 11-17.5 millimeters, and the depth of each groove is 0.5-0.8 millimeter; the side face of the cone of the drill bit body is provided with a hard alloy wear-resistant coating;
the preparation method comprises the following steps:
1) The side surface of the drill cone is provided with the spiral groove;
2) Cleaning the drill bit and removing oil stains;
3) Sand blasting by a drill to roughen the surface;
4) The spraying, drying the alloy powder, spraying by using supersonic flame spraying equipment, wherein the spraying distance is 210-280mm, the oxygen-kerosene flame speed is 1600-1800m/s, the nitrogen powder feeding speed is 32-36g/min, the drill bit moving speed is 0.25-0.35m/s, and the number of sprayed layers is 38-48; the alloy powder comprises the following components in parts by mass: cr 2 C 3 32-42 parts of NiCr21-28 parts of WC 5-12 parts of TaC 5-10 parts of Co 3-5 parts of Fe;
5) Cooling, namely putting the sprayed drill bit into a cooling box for cooling;
6) And polishing, namely polishing the cooled drill bit to be smooth and clean.
2. The method of making a wear resistant alloy coated drill bit as claimed in claim 1, wherein: the included angle of the groove on the side face of the drill bit body cone and the axis of the drill bit is 82 degrees, the width of the groove is 2.8 millimeters, the interval of the grooves is 14 millimeters, and the depth of the groove is 0.6 millimeter.
CN202110426454.5A 2021-04-20 2021-04-20 Wear-resistant alloy coating drill bit and preparation method thereof Active CN113369543B (en)

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CN114540719B (en) * 2022-01-06 2022-12-13 温州理工学院 Steel bonded hard alloy turning tool capable of cutting at high speed and preparation method thereof

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CN101037566A (en) * 2005-12-22 2007-09-19 莫门蒂夫性能材料股份有限公司 Wear resistant low friction coating composition, coated components, and method for coating thereof
CN101862825A (en) * 2009-04-17 2010-10-20 上海宝钢设备检修有限公司 Metal ceramic powder for thermal spraying and preparation method thereof

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EP2492034A4 (en) * 2009-10-21 2014-04-16 Fukui Prefectural Government Drill for composite material as well as machining method using same and machining apparatus using same
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CN101037566A (en) * 2005-12-22 2007-09-19 莫门蒂夫性能材料股份有限公司 Wear resistant low friction coating composition, coated components, and method for coating thereof
CN101862825A (en) * 2009-04-17 2010-10-20 上海宝钢设备检修有限公司 Metal ceramic powder for thermal spraying and preparation method thereof

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