CN103820703A - Alloy steel material for drill bits and preparation method thereof - Google Patents
Alloy steel material for drill bits and preparation method thereof Download PDFInfo
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- CN103820703A CN103820703A CN201410009820.7A CN201410009820A CN103820703A CN 103820703 A CN103820703 A CN 103820703A CN 201410009820 A CN201410009820 A CN 201410009820A CN 103820703 A CN103820703 A CN 103820703A
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- 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
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Abstract
The invention relates to an alloy steel material for drill bits. The alloy steel material comprises the following chemical element constituents by mass percent: 2.1 to 2.3 percent of carbon, 11.2 to 11.5 percent of chromium, 3.6 to 3.8 percent of tungsten, 2.5 to 2.7 percent of vanadium, 5.0 to 5.3 percent of cobalt, 4.4 to 4.7 percent of manganese, 1.2 to 1.4 percent of titanium, 0.5 to 0.7 percent of boron, 0.4 to 0.8 percent of Te, 0.02 to 0.04 percent of Pr, and the balance of iron and other inevitable impurities. On the basis of high-carbon steel, the chromium, the manganese and the boron are added to increase wear resistance and corrosion resistance and keep enough hardness; through adding the vanadium and the Pr, crystal grains are refined, and toughness is increased; through adding the tungsten and the cobalt, red hardness is increased; the alloy steel material is suitable for manufacturing medium and short drill bits, the alloy steel material is not easy to break, the service life of the alloy steel material is long, and furthermore, the cost of the alloy steel material is lower than that of high-speed steel. The refining agents of the alloy steel material are used for casting production, air hole degrees in casts can be reduced by 1 to 2 degrees, oxide inclusions are at about 2-level, and the rate of finished products is obviously increased.
Description
Technical field
The present invention relates to field of alloy material, relate in particular to a kind of drill bit alloy steel material and preparation method thereof.
Background technology
Electric drill is a kind of widely used power tool, is widely used in building, processing and other fields.The cardinal principle of electric drill is the rotation by electric motor, drives and drives apparatus for work, thereby make drill bit scrapings surface to pierce object, and drill bit is one of requisite parts of electric drill.
Drill bit material is mainly rapid steel and Wimet at present, these two kinds of alloy rigidities are high, wear-resisting, red hardness is good, and keep certain toughness, but electric drill in use, often occur fractureing, the easy to wear or buckling phenomenon of blade, drill bit often needs to change, and is mainly because the performances such as the hardness of drill bit material, wear resistance, toughness can not reach balance.
Summary of the invention
The object of the present invention is to provide a kind of drill bit alloy steel material and preparation method thereof, this grinding ball material has advantages of high rigidity, shock-resistant, wear-resisting, red hard high.
Technical scheme of the present invention is as follows:
A kind of drill bit alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 2.1-2.3, chromium 11.2-11.5, tungsten 3.6-3.8, vanadium 2.5-2.7, cobalt 5.0-5.3, manganese 4.4-4.7, titanium 1.2-1.4, boron 0.5-0.7, Te0.4-0.8, Pr0.02-0.04, surplus are iron and other inevitable impurity.
The production method of alloy steel material for described drill bit, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) manganese, chromium; (2) tungsten, cobalt, titanium; (3) vanadium, Te; (4) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 800-820 ℃ by room temperature with 250-260 ℃/h of speed, then be cooled to 600-610 ℃ with 240-250 ℃/h of speed, then be warming up to 940-950 ℃ with 250-260 ℃/h of speed, insulation 3-4 hour; Be cooled to 620-630 ℃ with 240-250 ℃/h of speed again, insulation 50-70 minute, then be cooled to 180-200 ℃ with 240-250 ℃/h of speed, insulation 2-3 hour; Be warming up to 370-380 ℃ with 150-170 ℃/h of speed again, insulation 40-50 minute, then be warming up to 530-540 ℃ with 150-170 ℃/h of speed, insulation 4-5 hour, takes out air cooling and get final product.
Described refining agent is made up of the raw material of following weight part: rhombspar 13-15, clay 30-35, aluminium sesquioxide 2-3, nanometer titanium dioxide 2-3, aluminium powder 1-2, tripoly phosphate sodium STPP 1-2, ferric oxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2, trees ashes 1-2, Na
2tiF
68-10; Its preparation method is that rhombspar, clay, fluorite, jade powder, montmorillonite, trees ashes are mixed, be heated to 2500-3000 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
Beneficial effect of the present invention
The present invention adds chromium, manganese, boron on the basis of high carbon steel, increase wear resistance and erosion resistance, kept enough hardness, by adding vanadium, Pr, refinement crystal grain, increase toughness, by adding tungsten, cobalt, increased red hardness, be applicable to make short-and-medium drill bit, not frangibility, long service life, and also lower than rapid steel cost; The present invention is by rationally controlling casting post-processing temperature, and throwing raw materials has in batches increased intensity, the wear resistance of alloy, has reduced fragility, by using scrap iron as raw material, makes alloy quality homogeneous.Refining agent of the present invention, for Foundry Production, can make the degree of porosity in foundry goods reduce 1-2 degree, and oxide inclusion, 2 grades of left and right, has obviously improved yield rate.
Embodiment
A kind of drill bit alloy steel material, chemical element composition and mass percent thereof that it contains are: carbon 2.1-2.3, chromium 11.2-11.5, tungsten 3.6-3.8, vanadium 2.5-2.7, cobalt 5.0-5.3, manganese 4.4-4.7, titanium 1.2-1.4, boron 0.5-0.7, Te0.4-0.8, Pr0.02-0.04, surplus are iron and other inevitable impurity.
Described drill bit by the production method of alloy steel material is:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.8 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) manganese, chromium; (2) tungsten, cobalt, titanium; (3) vanadium, Te; (4) other remaining components; The each batch of timed interval of dropping into element is 23 minutes, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 810 ℃ by room temperature with 255 ℃/h of speed, then be cooled to 605 ℃ with 245 ℃/h of speed, then be warming up to 945 ℃ with 255 ℃/h of speed, be incubated 3.5 hours; Be cooled to 625 ℃ with 245 ℃/h of speed again, be incubated 60 minutes, then be cooled to 190 ℃ with 245 ℃/h of speed, be incubated 2.5 hours; Be warming up to 375 ℃ with 160 ℃/h of speed again, be incubated 45 minutes, then be warming up to 535 ℃ with 160 ℃/h of speed, be incubated 4.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: rhombspar 13, clay 30, aluminium sesquioxide 3, nanometer titanium dioxide 2, aluminium powder 1, tripoly phosphate sodium STPP 2, ferric oxide 3, fluorite 6, jade powder 4, montmorillonite 1, trees ashes 1, Na
2tiF
68; Its preparation method is that rhombspar, clay, fluorite, jade powder, montmorillonite, trees ashes are mixed, be heated to 2500-3000 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
The drill bit of the present embodiment by the mechanical property of alloy steel material is: hardness HRC:64HRC, hardness 47 HRC 600 ℃ time, impact absorbing energy 52J, impelling strength 61J/cm2.
Claims (3)
1. a drill bit alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 2.1-2.3, chromium 11.2-11.5, tungsten 3.6-3.8, vanadium 2.5-2.7, cobalt 5.0-5.3, manganese 4.4-4.7, titanium 1.2-1.4, boron 0.5-0.7, Te0.4-0.8, Pr0.02-0.04, surplus are iron and other inevitable impurity.
2. the production method of alloy steel material for drill bit according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:0.5-1 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) manganese, chromium; (2) tungsten, cobalt, titanium; (3) vanadium, Te; (4) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, after feeding intake, stirs.
3. the production method of alloy steel material for drill bit according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 800-820 ℃ by room temperature with 250-260 ℃/h of speed, be cooled to 600-610 ℃ with 240-250 ℃/h of speed again, be warming up to 940-950 ℃ with 250-260 ℃/h of speed again, insulation 3-4 hour; Be cooled to 620-630 ℃ with 240-250 ℃/h of speed again, insulation 50-70 minute, then be cooled to 180-200 ℃ with 240-250 ℃/h of speed, insulation 2-3 hour; Be warming up to 370-380 ℃ with 150-170 ℃/h of speed again, insulation 40-50 minute, then be warming up to 530-540 ℃ with 150-170 ℃/h of speed, insulation 4-5 hour, takes out air cooling and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009820.7A CN103820703A (en) | 2014-01-09 | 2014-01-09 | Alloy steel material for drill bits and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009820.7A CN103820703A (en) | 2014-01-09 | 2014-01-09 | Alloy steel material for drill bits and preparation method thereof |
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| CN103820703A true CN103820703A (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410009820.7A Pending CN103820703A (en) | 2014-01-09 | 2014-01-09 | Alloy steel material for drill bits and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213046A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Steel material for hydraulic valve and preparing method of steel material |
| CN107557689A (en) * | 2017-11-01 | 2018-01-09 | 南通欧科数控设备有限公司 | A kind of production method of drill bit steel alloy |
| CN107829041A (en) * | 2017-11-01 | 2018-03-23 | 南通欧科数控设备有限公司 | A kind of drill bit tungsten system high speed steel material |
| CN109295381A (en) * | 2018-11-27 | 2019-02-01 | 胡敏 | A kind of Alloy steel material for drill and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385548A (en) * | 2001-03-05 | 2002-12-18 | 石田清仁 | Easy cut tool steel |
| CN102978526A (en) * | 2012-11-22 | 2013-03-20 | 浙江明磊工具实业有限公司 | Alloy steel material for drill and preparation method |
-
2014
- 2014-01-09 CN CN201410009820.7A patent/CN103820703A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385548A (en) * | 2001-03-05 | 2002-12-18 | 石田清仁 | Easy cut tool steel |
| CN102978526A (en) * | 2012-11-22 | 2013-03-20 | 浙江明磊工具实业有限公司 | Alloy steel material for drill and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 饶启昌等: "耐磨材料热处理问题的探讨", 《水利电力机械》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213046A (en) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | Steel material for hydraulic valve and preparing method of steel material |
| CN107557689A (en) * | 2017-11-01 | 2018-01-09 | 南通欧科数控设备有限公司 | A kind of production method of drill bit steel alloy |
| CN107829041A (en) * | 2017-11-01 | 2018-03-23 | 南通欧科数控设备有限公司 | A kind of drill bit tungsten system high speed steel material |
| CN109295381A (en) * | 2018-11-27 | 2019-02-01 | 胡敏 | A kind of Alloy steel material for drill and preparation method thereof |
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Application publication date: 20140528 |
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