CN114150176A - Drill bit production process with good impact resistance - Google Patents
Drill bit production process with good impact resistance Download PDFInfo
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- CN114150176A CN114150176A CN202111463013.9A CN202111463013A CN114150176A CN 114150176 A CN114150176 A CN 114150176A CN 202111463013 A CN202111463013 A CN 202111463013A CN 114150176 A CN114150176 A CN 114150176A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- 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
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- 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
- C22C29/10—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 based on titanium carbide
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
- B22F2003/242—Coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
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Abstract
The invention discloses a drill bit production process with good impact resistance, S1, selecting hard alloy as a raw material of a drill bit, wherein the hard alloy is titanium carbide powder as a matrix; s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 13-20 parts; s3, performing strengthened ball milling on 13-20 parts by mass of Co-Al bonding metal in the S2 and 94-98 parts by mass of titanium carbide powder; s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1200-1400 ℃; s5, keeping the sintering time in the S4 at 10-20 minutes; and S6, cutting threads on the sintered superfine cemented carbide in the S5 to obtain the drill bit body. The invention provides a production process of a drill bit with good impact resistance, which has the advantages of good impact resistance, high drill bit hardness and high wear resistance, and solves the problem of poor impact toughness of the existing drill bit.
Description
Technical Field
The invention relates to the technical field of drill bit production, in particular to a drill bit production process with good impact resistance.
Background
The drill bit is an integral part of the drilling apparatus and its main function is to break rock and form the borehole. The rotary drill bit is a drill bit commonly used in the petroleum industry at present, and can rotate under the drive of machinery, so that the whole drill bit is driven to perform centripetal motion, and rocks are cracked and broken through cutting and grinding, so that the effect of drilling downwards is achieved.
With the rapid development of economy, the drill bit is used more and more frequently, but when the ordinary drill bit is used, the surface of the drill bit is seriously damaged when the ordinary drill bit meets an extremely hard shell, the ordinary drill bit does not have toughness, and the impact resistance is poor.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a drill bit production process with good impact resistance, which has the advantages of good impact resistance, high drill bit hardness and high wear resistance, and solves the problem of poor impact toughness of the existing drill bit.
(II) technical scheme
In order to achieve the purpose of the production process of the drill bit with good impact resistance, the invention provides the following technical scheme: a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 13-20 parts;
s3, performing strengthened ball milling on 13-20 parts by mass of Co-Al bonding metal in the S2 and 94-98 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1200-1400 ℃;
s5, keeping the sintering time in the S4 at 10-20 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 550 ℃ and 600 ℃;
s8, heating the preheated drill bit body in the S7 to 900-950 ℃, adding 10-15 parts by mass of a protective agent, and keeping the heating time for 1-4 hours;
s9, after the step S8 is finished, reducing the temperature to 550 ℃ and 600 ℃, and keeping the temperature for 1-3 hours;
s10, taking out the drill bit in the S9, and quenching for 5-10 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into a high-temperature furnace again for heating, keeping the heating temperature at 150-200 ℃, taking out after 2-5 hours, and naturally cooling at a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Preferably, the sintering environment in S4 is vacuum sintering.
Preferably, the protective agent in S8 is carbon powder.
Preferably, the quenching medium used for quenching in S10 is quenching oil.
Preferably, in the step S7, the temperature of the surface of the drill bit is detected by using an infrared thermometer when the drill bit is heated.
Preferably, the grinding medium in S13 is an aqueous zinc stearate suspension.
(III) advantageous effects
Compared with the prior art, the invention provides a drill bit production process with good impact resistance, which has the following beneficial effects:
1. according to the production process of the drill bit with good impact resistance, the obtained ultrafine particle alloy is good in wear resistance, and the drill bit is sensitive to impact and vibration, so that the durability is improved.
2. According to the production process of the drill bit with good impact resistance, the protective layer is formed by adding the protective agent and heating, so that the wear resistance and the oxidation resistance of the drill bit are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The first embodiment is as follows:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 13 parts;
s3, performing strengthened ball milling on 13 parts by mass of Co-Al bonding metal in the S2 and 94 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1200 ℃;
s5, continuing the sintering time in S4 for 10 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 550 ℃;
s8, heating the preheated drill bit body in the step S7 to 900 ℃, adding 10 parts by mass of protective agent, and keeping the heating time for 1 hour;
s9, after the step S8 is finished, reducing the temperature to 550 ℃, and keeping the temperature for 1 hour;
s10, taking out the drill bit in the step S9, and quenching for 5 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into a high-temperature furnace again for heating, keeping the heating temperature at 150 ℃ for 2 hours, taking out the drill bit, and naturally cooling the drill bit in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example two:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 14 parts;
s3, carrying out strengthened ball milling on 14 parts by mass of Co-Al bonding metal in the S2 and 94.5 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1220 ℃;
s5, continuing the sintering time in S4 for 11 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 555 ℃;
s8, heating the bit body preheated in the step S7 to 910 ℃, adding 11 parts by mass of a protective agent, and keeping the heating time at 1.5 hours;
s9, after the step S8 is finished, reducing the temperature to 555 ℃, and keeping the temperature for 1.2 hours;
s10, taking out the drill bit in the step S9, and quenching for 5.5 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into the high-temperature furnace again for heating, keeping the heating temperature at 155 ℃, taking out after 2.5 hours, and naturally cooling in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example three:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 15 parts;
s3, performing strengthened ball milling on 15 parts by mass of Co-Al bonding metal in the S2 and 95 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1240 ℃;
s5, continuing the sintering time in S4 for 12 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 560 ℃;
s8, heating the preheated drill bit body in the step S7 to 915 ℃, adding 11.5 parts by mass of a protective agent, and keeping the heating time to be 1.6 hours;
s9, after the step S8 is finished, reducing the temperature to 560 ℃, and keeping the temperature for 1.5 hours;
s10, taking out the drill bit in the step S9, and quenching for 6 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into the high-temperature furnace again for heating, keeping the heating temperature at 160 ℃, taking out after 2.8 hours, and naturally cooling the drill bit in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example four:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 15.5 parts;
s3, performing strengthened ball milling on 15.5 parts by mass of Co-Al bonding metal in S2 and 95.5 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3 at 1260 ℃;
s5, continuing the sintering time in S4 at 13 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 565 ℃;
s8, heating the preheated drill bit body in the step S7 to 920 ℃, adding 12 parts by mass of a protective agent, and keeping the heating time to be 1.8 hours;
s9, after the step S8 is finished, reducing the temperature to 565 ℃, and keeping the temperature for 1.8 hours;
s10, taking out the drill bit in the step S9, and quenching for 6.5 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into a high-temperature furnace again for heating, keeping the heating temperature at 165 ℃ for 3 hours, taking out the drill bit, and naturally cooling the drill bit in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example five:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 16 parts;
s3, performing strengthened ball milling on 16 parts by mass of Co-Al bonding metal in S2 and 96 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1280 ℃;
s5, continuing the sintering time in S4 for 14 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 570 ℃;
s8, heating the bit body preheated in the step S7 to 925 ℃, adding 12.5 parts by mass of a protective agent, and keeping the heating time for 2 hours;
s9, after the step S8 is finished, reducing the temperature to 570 ℃, and keeping the temperature for 2 hours;
s10, taking out the drill bit in the step S9, and quenching for 7 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into the high-temperature furnace again for heating, keeping the heating temperature at 170 ℃, taking out after 3.2 hours, and naturally cooling in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example six:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 17 parts;
s3, carrying out strengthened ball milling on 17 parts by mass of Co-Al bonding metal in S2 and 96.5 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1300 ℃;
s5, continuing the sintering time in S4 for 15 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 575 ℃;
s8, heating the bit body preheated in the step S7 to 930 ℃, adding 13 parts by mass of a protective agent, and keeping the heating time for 2.5 hours;
s9, after the step S8 is finished, reducing the temperature to 575 ℃, and keeping the temperature for 2.2 hours;
s10, taking out the drill bit in the step S9, and quenching for 7.5 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into the high-temperature furnace again for heating, keeping the heating temperature at 175 ℃, taking out after 3.5 hours, and naturally cooling the drill bit in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example seven:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 18 parts;
s3, carrying out strengthened ball milling on 18 parts by mass of Co-Al bonding metal in S2 and 97 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1325 ℃;
s5, continuing the sintering time in S4 for 16 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 580 ℃;
s8, heating the preheated drill bit body in the step S7 to 935 ℃, adding 13.5 parts by mass of protective agent, and keeping the heating time for 3 hours;
s9, after the step S8 is finished, reducing the temperature to 580 ℃, and keeping the time for 2.5 hours;
s10, taking out the drill bit in the step S9, and quenching for 8 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into a high-temperature furnace again for heating, keeping the heating temperature at 180 ℃, taking out after 4 hours, and naturally cooling the drill bit in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example eight:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 19 parts;
s3, performing strengthened ball milling on 19 parts by mass of Co-Al bonding metal in S2 and 97.5 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1350 ℃;
s5, continuing the sintering time in S4 for 19 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 590 ℃;
s8, heating the preheated drill bit body in the step S7 to 940 ℃, adding 14 parts by mass of protective agent, and keeping the heating time at 3.5 hours;
s9, after the step S8 is finished, reducing the temperature to 590 ℃, and keeping the temperature for 2.8 hours;
s10, taking out the drill bit in the step S9, and quenching for 9 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into the high-temperature furnace again for heating, keeping the heating temperature at 190 ℃, taking out after 4.5 hours, and naturally cooling in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
Example nine:
a production process of a drill bit with good impact resistance comprises the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 20 parts;
s3, performing strengthened ball milling on 20 parts by mass of Co-Al bonding metal in the S2 and 98 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1400 ℃;
s5, continuing the sintering time in S4 for 20 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 600 ℃;
s8, heating the preheated drill bit body in the step S7 to 950 ℃, adding 15 parts by mass of a protective agent, and keeping the heating time for 4 hours;
s9, after the step S8 is finished, reducing the temperature to 600 ℃, and keeping the temperature for 3 hours;
s10, taking out the drill bit in the step S9, and quenching for 10 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into a high-temperature furnace again for heating, keeping the heating temperature at 200 ℃, taking out after 5 hours, and naturally cooling the drill bit in a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
The invention has the beneficial effects that: the obtained ultrafine particle alloy has good wear resistance, the drill bit is sensitive to impact and vibration, the durability is improved, and the protective layer is formed by adding a protective agent for heating, so that the wear resistance and the oxidation resistance of the drill bit are improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The production process of the drill bit with good impact resistance is characterized by comprising the following steps:
s1, selecting hard alloy as a raw material of the drill bit, wherein the hard alloy is titanium carbide powder as a matrix;
s2, taking Co-Al as bonding metal for the titanium carbide powder matrix in S1, wherein the mass part of the Co-Al is 13-20 parts;
s3, performing strengthened ball milling on 13-20 parts by mass of Co-Al bonding metal in the S2 and 94-98 parts by mass of titanium carbide powder;
s4, sintering the hard mixed gold mixture prepared by ball milling in the S3, wherein the sintering temperature is 1200-1400 ℃;
s5, keeping the sintering time in the S4 at 10-20 minutes;
s6, cutting threads on the sintered superfine hard alloy in the S5 to obtain a drill bit body;
s7, putting the drill bit body obtained in the step S6 into a high-temperature furnace for heating, wherein the heating temperature is 550 ℃ and 600 ℃;
s8, heating the preheated drill bit body in the S7 to 900-950 ℃, adding 10-15 parts by mass of a protective agent, and keeping the heating time for 1-4 hours;
s9, after the step S8 is finished, reducing the temperature to 550 ℃ and 600 ℃, and keeping the temperature for 1-3 hours;
s10, taking out the drill bit in the S9, and quenching for 5-10 minutes;
s11, putting the drill bit in the step S10 into a grinding machine for grinding;
s12, putting the drill bit polished in the step S11 into a high-temperature furnace again for heating, keeping the heating temperature at 150-200 ℃, taking out after 2-5 hours, and naturally cooling at a ventilated place;
and S13, taking out the drill bit naturally cooled in the step S12, and adding a grinding medium to carry out fine low-temperature grinding.
2. The process for producing an impact-resistant drill bit according to claim 1, wherein the sintering environment in the step S4 is vacuum sintering.
3. The process for producing a drill bit with good impact resistance according to claim 1, wherein the protective agent in S8 is carbon powder.
4. The process for producing a drill bit with good impact resistance according to claim 1, wherein the quenching medium used in the quenching in the step S10 is quenching oil.
5. The process for producing a drill bit with good impact resistance according to claim 1, wherein the surface temperature of the drill bit is detected by an infrared thermometer when the drill bit is heated in S7.
6. The process for producing a drill bit with good impact resistance according to claim 1, wherein the grinding medium in S13 is an aqueous zinc stearate suspension.
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