CN105734408B - High-strength tenacity carburizing and air cooling digging tool steel and its production method - Google Patents
High-strength tenacity carburizing and air cooling digging tool steel and its production method Download PDFInfo
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- CN105734408B CN105734408B CN201610277175.6A CN201610277175A CN105734408B CN 105734408 B CN105734408 B CN 105734408B CN 201610277175 A CN201610277175 A CN 201610277175A CN 105734408 B CN105734408 B CN 105734408B
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- 238000001816 cooling Methods 0.000 title claims abstract description 48
- 238000005255 carburizing Methods 0.000 title claims abstract description 27
- 229910001315 Tool steel Inorganic materials 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 11
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 10
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 7
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 238000005242 forging Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000005496 tempering Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of high-strength tenacity carburizing and air cooling digging tool steel and its production method, its composition by weight percent is as follows：C：0.1 0.40%, Si：0.7 1.3%, Mn:1.7 2.4%, Mo：0.1 0.3%, V：0.04 0.2%, Cr：0.70 2.0%, rare earth element ce, La：0.001 0.02%, balance iron.Become a useful person by the material of said ratio through smelting into ingot blank through 1100 DEG C of forging rollings, then the air cooling after 900 DEG C of heating：1 100 DEG C/min cooling rates obtain bainite structure, and 100 200 DEG C/min cooling rates obtain bainite+martensitic structure, through 100 300 DEG C of tempering；The steel conventional air cooling under 10 200 DEG C/min cooling rates after 900 920 DEG C of carburizings.The present invention can increase toughness and plasticity, the components such as material and digging tool is had optimal combination of strength and toughness, and significantly extension digging tool uses fatigue life.
Description
Technical field
The present invention relates to field of material technology, a kind of high-strength tenacity carburizing and air cooling digging tool steel is related in particular to,
Also relate to the production method of the high-strength tenacity carburizing and air cooling digging tool steel.
Background technology
Drill rod is slender rod piece, and directly progress liquid hardening is easily caused deformation and can not seriously used, therefore heavy
Drill steel manufacture uses low-carbon alloy steel to carry out carburizing air-blast quenching, lonneal to reduce quenching distortion after shaping.
Case-carbonizing layer, which obtains martensite, center portion and obtains martensite, adds bainite as finally using tissue.But this kind of steel is big at present
Many using low-carbon Ni-Cr systems steel, it has performance stable, and obdurability is excellent, and notch sensitivity is low, top layer concentration of carbon ladder after carburizing
The advantages of spending gentle.But higher Ni contents cause material cost to dramatically increase, while micro- group of top layer after this kind of material carburizing
Knit thicker, this is unfavorable to the fatigue life for improving drill steel.For Si--Mn--Mo system low middle carbon shellfish of this someone using low cost
Family name's body steel, to reduce cost, after this kind of steel carburizing under the conditions of appropriate air cooling cooling rate, can be obtained high to replace Ni-Cr systems steel
Obdurability, its air cooled hardenability is good, and uniform bainite structure can be obtained in whole cross section.But Si-Mn-Mo- Rare Earths
Air-cooled bainitic steels are under the conditions of large-size components center portion air cooling, it is easy to pro-eutectoid ferrite and island bainite even island occur
Shape tissue, so that the obdurability under the conditions of significantly reducing air cooling.
The content of the invention
It can increase toughness and plasticity it is an object of the invention to the one kind for overcoming disadvantages mentioned above and providing, make material and driving
The components such as instrument have optimal combination of strength and toughness, and significantly extension digging tool is dug using the high-strength tenacity carburizing and air cooling of fatigue life
Enter instrument steel.
Another object of the present invention is to provide the production method of the high-strength tenacity carburizing and air cooling digging tool steel.
A kind of high-strength tenacity carburizing and air cooling digging tool steel of the present invention, its composition by weight percent is as follows：
C：0.1-0.40%, Si：0.7-1.3%, Mn:1.7-2.4%, Mo：0.1-0.3%, V：0.04-0.2%, Cr：
0.70-2.0%, rare earth element ce, La：0.001-0.02%, balance iron.
A kind of production method of high-strength tenacity carburizing and air cooling digging tool steel, comprises the following steps：
（1）The material of said ratio is become a useful person through smelting into ingot blank through 1100 DEG C of forging rollings, then the air cooling after 900 DEG C of heating：1-
100 DEG C/min cooling rates obtain bainite structure, and 100-200 DEG C/min cooling rates obtain bainite+martensitic structure；Through 100-300
DEG C tempering；
（2）The steel conventional air cooling under 10-200 DEG C/min cooling rates after 900-920 DEG C of carburizing.
The present invention compared with prior art, with obvious beneficial effect, as can be known from the above technical solutions：The present invention be
Alloying elements cr is added on the basis of Si-Mn-Mo- rare earths, while adding Cr and rare earth alloy element has following important function：One
It is that crystal grain thinning and thinning microstructure collective effect effect are higher than independent rare earth element ce and La and the Si-Mn-Mo-Cr systems without rare earth
Bainite structure and martensitic structure in bainitic steel, refinement process air cooler, significantly improve Fracture of Material.Two be to postpone being somebody's turn to do
The bainite transformation bay area of steel, adds bainitic transformation and breeds area, reduce bainite transformation Bs points, be more likely to acquired
The pencil or acicular bainite tissue of transitional form refinement that can be excellent；This air cooling that the steel just greatly improved obtains bayesian
The quenching degree of body tissue, can obtain transitional form bainite under the conditions of diameter 100mm.Three be in carburizing process with carbon knot
Conjunction forms Cr systems carbide, promotes absorption of the workpiece surface to active atoms of carbon, improves surface carbon concentration, forms high carbon concentration ladder
Degree, adds carburizing speed, improves case hardness.The surface infiltration layer compression of material is lifted simultaneously, is conducive to improving and is tunneled
The fatigue crack extended capability of instrument；Four be Cr addition and its top layer on the premise of the effective hardness of layer surface is ensured
The formation of Cr systems carbide, the martensite for the steel that is significantly increased and the temper resistance of bainite structure, so as to by improving
Temperature, which reaches, further improves its center portion obdurability purpose, and then Fracture of Material is played an important role, big to reach
The purpose of the service life of width extension digging tool.
Tested and analyzed by many heat meltings, added Cr and rare earth alloy element collective effect, the present invention is in 1-100
DEG C/min cooling rates in the range of whole cross section can obtain uniform bainite structure, can obtain part more than 100 DEG C/min cooling rates
Martensitic structure, with good air cooled hardenability, hence it is evident that the substructure slip in refinement transitional form bainite and martensite
Size, so that toughness and plasticity are all improved.Using the present invention, after to rock drilling digging tool carburizing significantly improving surface oozes
Layer hardness and centre hardness, carbon concentration distribution also have clear improvement, and it is strong that control can be adjusted by improving temperature
Degree increase toughness and plasticity, make the components such as material and digging tool have optimal combination of strength and toughness, hence it is evident that lifting material and driving
The surface infiltration layer compression of the components such as instrument, significantly extension digging tool uses fatigue life.
Embodiment
Embodiment 1：
A kind of production method of high-strength tenacity carburizing and air cooling digging tool steel, comprises the following steps：
C：0.28%, Si：1.05%, Mn:2.2%, Mo：0.28%, V：0.10%, Cr：1.8%, rare earth element ce, La：
0.012%, balance iron.
（1）The material of said ratio is become a useful person through smelting into ingot blank through 1100 DEG C of forging rollings, then the air cooling after 900 DEG C of heating：50
DEG C/min cooling rates acquisition bainite structure, it is respectively provided with excellent obdurability through 250 DEG C of tempering；
（2）The steel conventional air cooling under 100 DEG C/min cooling rates after 900 DEG C of carburizings.After testing：Case hardness is
HRC62.4, no inner oxidation defect, center portion HRC54.1, bearing stress（Negative value）Absolute value reach more than 400MPa.
Embodiment 2：
A kind of production method of high-strength tenacity carburizing and air cooling digging tool steel, comprises the following steps：
C：0.1%, Si：0.7%, Mn:1.7%, Mo：0.3%, V：0.2%, Cr：0.70%, rare earth element ce, La：0.02%,
Balance iron.
（1）The material of said ratio is become a useful person through smelting into ingot blank through 1100 DEG C of forging rollings, then the air cooling after 900 DEG C of heating：100
DEG C/min cooling rates acquisition bainite+martensitic structure, it is respectively provided with excellent obdurability through 100 DEG C of tempering；
（2）The steel conventional air cooling under 200 DEG C/min cooling rates after 920 DEG C of carburizings.After testing：Case hardness is HRC63,
No inner oxidation defect, center portion HRC55, bearing stress（Negative value）Absolute value reach more than 400MPa.
Embodiment 3：
A kind of production method of high-strength tenacity carburizing and air cooling digging tool steel, comprises the following steps：
C：0.40%, Si：1.3%, Mn:2.4%, Mo：0.3%, V：0.04%, Cr：2.0%, rare earth element ce, La：
0.001%, balance iron.
（1）The material of said ratio is become a useful person through smelting into ingot blank through 1100 DEG C of forging rollings, then the air cooling after 900 DEG C of heating：200
DEG C/min cooling rates acquisition bainite+martensitic structure, it is respectively provided with excellent obdurability through 300 DEG C of tempering；
（2）The steel conventional air cooling under 10 DEG C/min cooling rates after 900 DEG C of carburizings.After testing：Case hardness is HRC57,
No inner oxidation defect, center portion HRC38, bearing stress（Negative value）Absolute value reach more than 400MPa.
The above described is only a preferred embodiment of the present invention, not making any formal limitation to the present invention, appoint
What is without departing from technical solution of the present invention content, and what the technical spirit according to the present invention was made to above example any simply repaiies
Change, equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (2)
1. a kind of high-strength tenacity carburizing and air cooling digging tool steel, its composition by weight percent is as follows：
C：0.1-0.28%, Si：1.05-1.3%, Mn:2.2-2.4%, Mo：0.1-0.28%, V：0.04-0.1%, Cr：1.8-
2.0%, rare earth element ce, La：0.001-0.012%, balance iron.
2. the production method of high-strength tenacity carburizing and air cooling digging tool steel as claimed in claim 1, comprises the following steps：
（1）The material of said ratio is become a useful person through smelting into ingot blank through 1100 DEG C of forging rollings, then the air cooling after 900 DEG C of heating：1-100
DEG C/min cooling rates acquisition bainite structure, 100-200 DEG C/min cooling rates acquisition bainite+martensitic structure；Returned through 100-300 DEG C
Fire；
（2）The steel conventional air cooling under 10-200 DEG C/min cooling rates after 900-920 DEG C of carburizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277175.6A CN105734408B (en) | 2016-04-30 | 2016-04-30 | High-strength tenacity carburizing and air cooling digging tool steel and its production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610277175.6A CN105734408B (en) | 2016-04-30 | 2016-04-30 | High-strength tenacity carburizing and air cooling digging tool steel and its production method |
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| CN105734408B true CN105734408B (en) | 2017-09-22 |
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| CN115094336A (en) * | 2022-07-22 | 2022-09-23 | 贵州惠沣众一机械制造有限公司 | Steel for high-temperature-resistant hot-insert alloy tooth drill bit and heat treatment processing technology thereof |
| CN115323313A (en) * | 2022-08-16 | 2022-11-11 | 贵州惠沣众一机械制造有限公司 | Production method of high-quality low-cost rock drilling tool |
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| CN103409689A (en) * | 2013-07-31 | 2013-11-27 | 内蒙古包钢钢联股份有限公司 | Bainitic/martensitic steel treated by rare earth and special for railway frog |
| CN105018859B (en) * | 2015-07-30 | 2017-09-19 | 中煤张家口煤矿机械有限责任公司 | A kind of preparation method of wear-resisting Bainite Casting Steel |
| CN105063510B (en) * | 2015-08-11 | 2017-05-10 | 东北大学 | High-plasticity 700 MPa cold-rolled weather-proof dual-phase steel and preparation method thereof |
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Date of cancellation: 20230228 Granted publication date: 20170922 Pledgee: Guiyang industrial Financing Guarantee Co.,Ltd. Pledgor: GUIZHOU HUIFENG ZHONGYI MACHINERY MANUFACTURING CO.,LTD. Registration number: Y2021520000018 |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 198 Development Avenue, Xiaomeng Industrial Park, Xiaomeng Sub district Office, Guiyang Economic Development Zone, Guizhou Province, 550000 Patentee after: Guizhou Xinrui Huifeng Machinery Manufacturing Co.,Ltd. Country or region after: China Address before: 550006 Xiaomeng Industrial Park, Economic and Technological Development Zone, Guiyang City, Guizhou Province (5th floor, Building 1, Phase II of Xiaomeng Equipment Manufacturing Ecological Industrial Park Standard Factory) Patentee before: GUIZHOU HUIFENG ZHONGYI MACHINERY MANUFACTURING CO.,LTD. Country or region before: China |