CN107723615A - A kind of high-speed tool steel for drill bit material and preparation method thereof - Google Patents

A kind of high-speed tool steel for drill bit material and preparation method thereof Download PDF

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Publication number
CN107723615A
CN107723615A CN201711056247.5A CN201711056247A CN107723615A CN 107723615 A CN107723615 A CN 107723615A CN 201711056247 A CN201711056247 A CN 201711056247A CN 107723615 A CN107723615 A CN 107723615A
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Prior art keywords
speed
drill bit
incubated
tool steel
warming
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CN201711056247.5A
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Chinese (zh)
Inventor
陈海涛
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Nanjing Ouke Numerical Control Equipment Co Ltd
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Nanjing Ouke Numerical Control Equipment Co Ltd
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Priority to CN201711056247.5A priority Critical patent/CN107723615A/en
Publication of CN107723615A publication Critical patent/CN107723615A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a kind of high-speed tool steel for drill bit material, its chemical element component contained and its mass percent are：Carbon 0.9 1.3, tungsten 8.2 8.4, molybdenum 1.6 1.8, chromium 6.1 6.3, silicon 1.5 1.7, manganese 1.3 1.5, cobalt 0.8 1.0, Sc0.1 0.14, Tb0.05 0.08, surplus are iron and other inevitable impurity.High-speed steel of the present invention reduces the dosage of tungsten and molybdenum, with the addition of Sc, Tb, adds intensity and wearability, and also with good toughness, the drill bit made of the steel alloy is not easily broken, service life length；By rationally controlling casting post-processing temperature, throwing raw materials, add the intensity of alloy, reduce fragility the present invention in batches, by using scrap iron as raw material, make alloy quality homogeneous.Refining agent of the present invention is used for Foundry Production, the degree of porosity in casting can be made to reduce by 12 degree, oxide inclusion is at 2 grades or so, hence it is evident that improves yield rate.

Description

A kind of high-speed tool steel for drill bit material and preparation method thereof
Technical field
The present invention relates to field of alloy material, more particularly to a kind of high-speed tool steel for drill bit material and preparation method thereof.
Background technology
Electric drill is a kind of widely used electric tool, is widely used in building, processing and other fields.Electric drill it is main Principle is the rotation by motor, drives driving apparatus for work, so that drill bit scraping material surface is to pierce object, drill bit It is one of essential part of electric drill.
Drill bit material is mainly high-speed steel and hard alloy at present, and both alloy rigidities are high, wear-resisting, red hardness is good, and And certain toughness is kept, but electric drill is in use, often occurs fractureing, blade is easy to wear or buckling phenomenon, drill bit It is frequently necessary to change, balance can not be reached by being primarily due to the performances such as the hardness, wearability, toughness of drill bit material.
The content of the invention
It is an object of the invention to provide a kind of high-speed tool steel for drill bit material and preparation method thereof, grinding ball material tool There is the advantages of high intensity, wearability are good, red hardness is good.
Technical scheme is as follows：
A kind of high-speed tool steel for drill bit material, it is characterised in that：Its chemical element component contained and its quality percentage Than for：Carbon 0.9-1.3, tungsten 8.2-8.4, molybdenum 1.6-1.8, chromium 6.1-6.3, silicon 1.5-1.7, manganese 1.3-1.5, cobalt 0.8-1.0, Sc0.1-0.14, Tb0.05-0.08, surplus are iron and other inevitable impurity.
The production method of described high-speed tool steel for drill bit material, it is characterised in that：
(1), prepare the pig iron and scrap iron presses 1：The pig iron is added in input stove and melted as ferrous substrate source by 0.3-0.6 ratios Change, carry out desulfurization, deoxidation, alloying is carried out using refining agent initial refining, addition alloying component, add scrap iron fusing, add Enter refining agent double refining, detection and adjust chemical element component content to it is qualified, casting, casting after heat treatment etc.；
(2), the lot sequence for putting into alloying element in alloying process into stove is：(1) chromium, silicon, manganese；(2) tungsten, molybdenum； (3) other residual components；The time interval of each batch input element is 21-25 minutes, is stirred after feeding intake.
Being heat-treated after described casting is：First 750-770 DEG C is warming up to by room temperature with 250-260 DEG C/h of speed, then with 270-280 DEG C/h of speed is cooled to 580-600 DEG C, then is warming up to 920-930 DEG C with 250-260 DEG C/h of speed, insulation 3-4 hours；Be cooled to 610-620 DEG C with 240-250 DEG C/h of speed again, be incubated 50-70 minutes, then with 240-250 DEG C/it is small When speed be cooled to 180-200 DEG C, be incubated 2-3 hours；370-380 DEG C is warming up to 150-170 DEG C/h of speed again, insulation 40-50 minutes, then 520-530 DEG C is warming up to 150-170 DEG C/h of speed, 2-3 hours are incubated, air cooling is taken out and produces.
Described refining agent is made from the following raw materials in parts by weight：Dolomite 13-15, clay 30-35, alundum (Al2O3) 2- 3rd, nanometer titanium dioxide 2-3, aluminium powder 1-2, sodium tripolyphosphate 1-2, di-iron trioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2, tree ash 1-2, Na2TiF68-10；Its preparation method is by dolomite, clay, fluorite, jade powder, montmorillonite, trees Ashes mix, and are heated to 2500-3000 DEG C, stir 1-2 hours, after cooling, add into 10-15% hydrochloric acid solution, soak 1-2 hours, filtering, filter residue are cleaned with clear water repeatedly, are dried, and are well mixed and are produced with the merging of other compositions.
Beneficial effects of the present invention
High-speed steel of the present invention reduces the dosage of tungsten and molybdenum, with the addition of Sc, Tb, adds intensity and wearability, maintains Enough hardness, also with good toughness, the drill bit made of the steel alloy is not easily broken, service life length；The present invention is logical Rationally control casting post-processing temperature is crossed, throwing raw materials, add intensity, the wearability of alloy, fragility is reduced, by making in batches By the use of scrap iron as raw material, make alloy quality homogeneous.Refining agent of the present invention is used for Foundry Production, can reduce the degree of porosity in casting 1-2 degree, oxide inclusion is at 2 grades or so, hence it is evident that improves yield rate.
Embodiment
A kind of high-speed tool steel for drill bit material, its chemical element component contained and its mass percent are：Carbon 0.9- 1.3rd, tungsten 8.2-8.4, molybdenum 1.6-1.8, chromium 6.1-6.3, silicon 1.5-1.7, manganese 1.3-1.5, cobalt 0.8-1.0, Sc0.1-0.14, Tb0.05-0.08, surplus are iron and other inevitable impurity.
The production method of described high-speed tool steel for drill bit material is：
(1), prepare the pig iron and scrap iron presses 1：The pig iron is added in input stove and melted, entered as ferrous substrate source by 0.4 ratio Row desulfurization, deoxidation, using refining agent initial refining, addition alloying component carry out alloying, add scrap iron fusing, add refining Agent double refining, detection and adjust chemical element component content to it is qualified, casting, casting after heat treatment etc.；
(2), the lot sequence for putting into alloying element in alloying process into stove is：(1) chromium, silicon, manganese；(2) tungsten, molybdenum； (3) other residual components；The time interval of each batch input element is 23 minutes, is stirred after feeding intake.
Being heat-treated after described casting is：760 DEG C first are warming up to 255 DEG C/h of speed by room temperature, then with 275 DEG C/h Speed is cooled to 590 DEG C, then is warming up to 925 DEG C with 255 DEG C/h of speed, is incubated 3.5 hours；Again with 245 DEG C/h of speed 615 DEG C are cooled to, is incubated 60 minutes, then 190 DEG C are cooled to 245 DEG C/h of speed, is incubated 2.5 hours；Again with 160 DEG C/it is small When speed be warming up to 375 DEG C, be incubated 45 minutes, then 525 DEG C are warming up to 160 DEG C/h of speed, be incubated 2.5 hours, take out empty It is cold to produce.
Described refining agent is made up of the raw material of following parts by weight (kilogram)：Dolomite 13, clay 30, alundum (Al2O3) 3, Nanometer titanium dioxide 2, aluminium powder 1, sodium tripolyphosphate 2, di-iron trioxide 3, fluorite 6, jade powder 4, montmorillonite 1, tree ash 1, Na2TiF68；Its preparation method is to mix dolomite, clay, fluorite, jade powder, montmorillonite, tree ash, is heated to 2500- 3000 DEG C, 1-2 hours are stirred, after cooling, are added into 10-15% hydrochloric acid solution, soaked 1-2 hours, filtering, filter residue is repeatedly Cleaned, dried with clear water, be well mixed and produce with the merging of other compositions.
The mechanical performance of the high-speed tool steel for drill bit material of the present embodiment is：Hardness 64HRC, hardness at 600 DEG C 46HRC, impact absorbing energy 53J, impact flexibility 62J/cm2.

Claims (3)

  1. A kind of 1. high-speed tool steel for drill bit material, it is characterised in that：Its chemical element component and its mass percent for containing For：Carbon 0.9-1.3, tungsten 8.2-8.4, molybdenum 1.6-1.8, chromium 6.1-6.3, silicon 1.5-1.7, manganese 1.3-1.5, cobalt 0.8-1.0, Sc0.1-0.14, Tb0.05-0.08, surplus are iron and other inevitable impurity.
  2. 2. the production method of high-speed tool steel for drill bit material according to claim 1, it is characterised in that：
    (1), prepare the pig iron and scrap iron presses 1：The pig iron is added in input stove and melted, entered as ferrous substrate source by 0.3-0.6 ratios Row desulfurization, deoxidation, using refining agent initial refining, addition alloying component carry out alloying, add scrap iron fusing, add refining Agent double refining, detection and adjust chemical element component content to it is qualified, casting, casting after heat treatment etc.；
    (2), the lot sequence for putting into alloying element in alloying process into stove is：(1) chromium, silicon, manganese；(2) tungsten, molybdenum；(3) its His residual components；The time interval of each batch input element is 21-25 minutes, is stirred after feeding intake.
  3. 3. the production method of high-speed tool steel for drill bit material according to claim 2, it is characterised in that：After described casting Heat treatment is：750-770 DEG C first is warming up to 250-260 DEG C/h of speed by room temperature, then is dropped with 270-280 DEG C/h of speed Temperature is warming up to 920-930 DEG C to 580-600 DEG C, then with 250-260 DEG C/h of speed, is incubated 3-4 hours；Again with 240-250 DEG C/h speed is cooled to 610-620 DEG C, is incubated 50-70 minutes, then be cooled to 180-200 with 240-250 DEG C/h of speed DEG C, it is incubated 2-3 hours；370-380 DEG C is warming up to 150-170 DEG C/h of speed again, is incubated 40-50 minutes, then with 150- 170 DEG C/h of speed are warming up to 520-530 DEG C, are incubated 2-3 hours, take out air cooling and produce.
CN201711056247.5A 2017-11-01 2017-11-01 A kind of high-speed tool steel for drill bit material and preparation method thereof Withdrawn CN107723615A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505095A (en) * 2011-12-21 2012-06-20 朱昌宏 High-speed tool steel for drill bit
CN103774045A (en) * 2014-01-09 2014-05-07 马鞍山市恒毅机械制造有限公司 High-speed tool steel material for drill bits and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505095A (en) * 2011-12-21 2012-06-20 朱昌宏 High-speed tool steel for drill bit
CN103774045A (en) * 2014-01-09 2014-05-07 马鞍山市恒毅机械制造有限公司 High-speed tool steel material for drill bits and preparation method thereof

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Application publication date: 20180223

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