CN105803326B - The air-cooled drilling tool steel of high-strength tenacity and its production method - Google Patents
The air-cooled drilling tool steel of high-strength tenacity and its production method Download PDFInfo
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- CN105803326B CN105803326B CN201610277176.0A CN201610277176A CN105803326B CN 105803326 B CN105803326 B CN 105803326B CN 201610277176 A CN201610277176 A CN 201610277176A CN 105803326 B CN105803326 B CN 105803326B
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- 238000005553 drilling Methods 0.000 title claims abstract description 31
- 229910001315 Tool steel Inorganic materials 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 30
- 239000000956 alloy Substances 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 21
- 229910001563 bainite Inorganic materials 0.000 claims description 13
- 238000005255 carburizing Methods 0.000 claims description 13
- 238000007670 refining Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 229910000734 martensite Inorganic materials 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 238000005242 forging Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000265 homogenisation Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 235000015170 shellfish Nutrition 0.000 claims 2
- 239000000463 material Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- -1 aluminium-scandium Chemical compound 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010410 layer Substances 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010703 silicon Substances 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The invention discloses a kind of air-cooled drilling tool steel of high-strength tenacity and its production method, composition by weight percent are as follows：C：0.1 0.40%, Si：0.7 1.3%, Mn:1.7 2.5%, Mo：0.1 0.3%, V：0.04‑0.2%,Al:0.02 0.6%, Sc：0.001 0.08%, or remaining rare earth element ce, La are added simultaneously:0.001 0.02%, surplus is iron.Sc comes from Al Sc intermediate alloys, and weight percent of the Sc in intermediate alloy is 1.5 4%.The present invention can increase toughness and plasticity, and the components such as drilling tool is made to have good combination of strength and toughness, significantly improve drilling tool and use fatigue life, be unlikely to deform, at low cost.
Description
Technical field
The present invention relates to field of material technology, relate in particular to a kind of air-cooled drilling tool steel of high-strength tenacity, while also relating to
And the preparation method of the air-cooled drilling tool steel of the high-strength tenacity.
Background technology
Drill rod is slender rod piece, and directly progress liquid hardening is easy to cause deformation and can not seriously use, therefore heavy
Drill steel manufacture, which is all made of after low-carbon alloy steel shapes, carries out carburizing air-blast quenching, lonneal to reduce quenching distortion.
Case-carbonizing layer obtains martensite, center portion obtains martensite and bainite is added to use tissue as final.This kind of steel is adopted mostly at present
With low-carbon Ni-Cr systems steel, it stablizes with performance, and obdurability is excellent, and notch sensitivity is low, surface layer carbon profile is flat after carburizing
The advantages that slow.But higher Ni contents cause material cost to dramatically increase, at the same after this kind of material carburizing surface layer microscopic structure compared with
Coarse, this is unfavorable to the fatigue life for improving drill steel.Someone is using the inexpensive low middle carbon bainite of Si--Mn--Mo systems thus
Steel replaces Ni-Cr systems steel to reduce cost, after this kind of steel carburizing under the conditions of appropriate air-cooled cooling rate, can obtain high tough
Property, air cooled hardenability is good, and uniform bainite structure can be obtained in whole cross section, but this kind of steel is easy in carburizing process
Generate grain boundary oxidation, while it is wide there is also one-step temper embrittlement range the problems such as, this will damage fatigue strength and the longevity of drilling tool
Life, while being also unfavorable for further increasing for drilling tool obdurability.
Invention content
It is an object of the invention to overcome disadvantages mentioned above and provide it is a kind of can increase toughness and plasticity, make the components such as drilling tool
It with good combination of strength and toughness, significantly improves drilling tool and uses fatigue life, be unlikely to deform, the air-cooled drilling tool of high-strength tenacity at low cost is used
Steel.
Another object of the present invention is to provide the production methods of the air-cooled drilling tool steel of the high-strength tenacity.
A kind of air-cooled drilling tool steel of high-strength tenacity of the present invention, composition by weight percent are as follows：
C：0.1-0.40%, Si：0.7-1.3%, Mn:1.7-2.5%, Mo：0.1-0.3%, V：0.04-0.2%, Al:
0.02-0.6%, Sc：0.001-0.08%, or remaining rare earth element ce, La are added simultaneously:0.001-0.02%, surplus are iron.
A kind of air-cooled drilling tool steel of above-mentioned high-strength tenacity, wherein：Sc comes from Al-Sc intermediate alloys, and Sc is in intermediate alloy
In weight percent be 1.5-4%.
A kind of production method of the air-cooled drilling tool steel of high-strength tenacity, includes the following steps：
（1）Using Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 1.5-4%,
The intermediate alloy is added in molten steel after homogenization using insertion in the refining process after smelting deoxidation and obtains containing Al-Sc
Steel ingot base；
（2）Steel ingot base is become a useful person through 1100 DEG C of forging rollings, then through 880-900 DEG C heating after it is air-cooled：10-100 DEG C/min cooling rates obtain
Bainite structure is obtained, 100-200 DEG C/min cooling rates obtain bainite+martensitic structure；It is tempered through 100 DEG C -400 DEG C；
（3）It is conventional air-cooled under 30-200 DEG C/min cooling rates after 900 DEG C of -920 DEG C of carburizings again.
Compared with prior art, the present invention there is apparent advantageous effect, as can be known from the above technical solutions：The present invention be
Rare earth Sc is added on the basis of Si-Mn-Mo, is stored in bauxite, phosphorus lump ore, arizonite because Sc elements are mostly attached, is individually carried
It takes using cost can be significantly increased, Sc is made to be difficult to obtain practical application.But the scandium by being enriched in bauxite contains to smelt scandium
High aluminium-bearing master alloy is measured, obtaining the cost of Sc can be greatly reduced.To significantly reduce the cost of addition scandium, therefore use aluminium-scandium
Intermediate alloy forms low middle carbon Si-Mn-Mo-Al-Sc systems drilling tool air-colled bainite in the refinery practice addition for smelting the later stage
Steel.It obtains to be added in steel using intermediate alloy by more heat melting experiments and analysis and can play refinement transitional form bayesian
Substructure slip size in body and martensite, to make toughness and plasticity be significantly increased.Using the new material, in drilling tool
Carburizing process substantially can to avoid crystal boundary internal oxidition problem, while the elements such as scandium, silicon have to metastable retained austenite it is important
Thermostabilization, while Al reduces the retained austenite scale of construction again, to significantly improve one-step temper embrittlement generation
Temperature allows material and drilling tool by improving temperature come adjusting strength, increases toughness and plasticity, to make the structures such as drilling tool
Part has good combination of strength and toughness, significantly improves drilling tool and uses fatigue life, has important innovations.The new material is 10-simultaneously
Whole cross section can obtain uniform bainite structure within the scope of 100 DEG C/min cooling rates, can get part more than 100/min cooling rates
Martensitic structure has larger air cooled hardenability.This can be by reducing air-cooled rate come into one to elongated drill rod
Step reduces the deformation that cooling procedure generates, to also just reduce the subsequent alignment amount of drilling tool, to improving drilling tool service life tool
There is good effect.
Specific implementation mode
Embodiment 1：
A kind of production method of the air-cooled drilling tool steel of high-strength tenacity, includes the following steps：
It is as follows by weight percentage：
C：0.323%, Si：1.05%, Mn:2.092%, Mo：0.25%, V：0.08%, Al:0.127%, Sc：0.008%,
Or remaining rare earth element ce, La are added simultaneously:0.001-0.02%, surplus are iron.
（1）Using Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 1.5%.
It smelts that the intermediate alloy is added in molten steel after homogenization using insertion in the refining process after deoxidation and obtains containing Al-Sc's
Steel ingot base；
（2）Steel ingot base is become a useful person through 1100 DEG C of forging rollings, then through 880 DEG C heating after it is air-cooled：10 DEG C/min cooling rates obtain bainite
Tissue, all has excellent obdurability through 250 DEG C of tempering, does not generate one-step temper embrittlement；
（3）It is conventional air-cooled under 100 DEG C/min cooling rates after 900 DEG C of carburizings.Case hardness HRC60 after testing, without interior oxygen
Change defect, center portion HRC38.
Embodiment 2：
A kind of production method of the air-cooled drilling tool steel of high-strength tenacity, includes the following steps：
It is as follows by weight percentage：
C：0.193%, Si：1.02%, Mn:2.02%, Mo：0.21%, V：0.11%, Al:0.501%, Sc：0.010%,
Or remaining rare earth element ce is added simultaneously:0.006% surplus is iron.
（1）Using Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 2%.In smelting
The intermediate alloy is added in molten steel after homogenization using insertion in refining process after refining deoxidation and obtains the steel containing Al-Sc
Ingot blank；
（2）Steel ingot base is become a useful person through 1100 DEG C of forging rollings, then through 880 DEG C heating after it is air-cooled：80 DEG C/min cooling rates obtain bainite
Tissue, all has excellent obdurability through 250 DEG C of tempering, does not generate one-step temper embrittlement；
（3）Air-cooled under 100 DEG C/min cooling rates after 920 DEG C of carburizings, case hardness can get HRC58 after testing, without in
Oxidation defect, center portion HRC39.
Embodiment 3：
A kind of production method of the air-cooled drilling tool steel of high-strength tenacity, includes the following steps：
It is as follows by weight percentage：
C：0.1%, Si：0.7%, Mn:1.7%, Mo：0.1%, V：0.2%, Al:0.02%, Sc：0.001%, or add simultaneously
Add remaining rare earth element ce, La:0.02, surplus is iron.
（1）Using Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 3%.In smelting
The intermediate alloy is added in molten steel after homogenization using insertion in refining process after refining deoxidation and obtains the steel containing Al-Sc
Ingot blank；
（2）Steel ingot base is become a useful person through 1100 DEG C of forging rollings, then through 900 DEG C heating after it is air-cooled：200 DEG C/min cooling rates obtain bainite
+ martensitic structure all has excellent obdurability through 200 DEG C of tempering, does not generate one-step temper embrittlement；
（3）Air-cooled under 30 DEG C/min cooling rates after 910 DEG C of carburizings, case hardness can get HRC57, and no inner oxidation lacks
It falls into, center portion HRC36.
Embodiment 4：
A kind of production method of the air-cooled drilling tool steel of high-strength tenacity, includes the following steps：
It is as follows by weight percentage：
C：0.40%, Si：1.3%, Mn: 2.5%, Mo：0.3%, V：0.04%, Al:0.6%, Sc：0.08%, or simultaneously
Add remaining rare earth element ce, La:0.001% surplus is iron.
（1）Using Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 4%.In smelting
The intermediate alloy is added in molten steel after homogenization using insertion in refining process after refining deoxidation and obtains the steel containing Al-Sc
Ingot blank；
（2）Steel ingot base is become a useful person through 1100 DEG C of forging rollings, then through 900 DEG C heating after it is air-cooled：100 DEG C/min cooling rates obtain bainite
+ martensitic structure all has excellent obdurability through 350 DEG C of tempering, does not generate one-step temper embrittlement；
（3）Air-cooled under 200 DEG C/min cooling rates after 920 DEG C of carburizings, case hardness can get HRC63, and no inner oxidation lacks
It falls into, center portion HRC40.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form, appoint
What is simply repaiied to any made by above example according to the technical essence of the invention without departing from technical solution of the present invention content
Change, equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (3)
1. a kind of air-cooled drilling tool steel of high-strength tenacity, composition by weight percent are as follows：
C：0.1-0.40%, Si：1.02-1.05%, Mn:1.7-2.5%, Mo：0.1-0.3%, V：0.04-0.2%, Al：
0.02-0.6%, Sc：0.001-0.08%, or remaining rare earth element ce, La are added simultaneously:0.001-0.02%, surplus are iron；
The production method of the air-cooled drilling tool steel of high-strength tenacity, includes the following steps：
(1) use Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 1.5-4%, in smelting
The intermediate alloy is added in molten steel after homogenization using insertion in refining process after refining deoxidation and obtains the steel containing Al-Sc
Ingot blank；
(2) steel ingot base is become a useful person through 1100 DEG C of forging rollings, then air-cooled, the 10-100 DEG C/min cooling rates acquisition shellfish after 880-900 DEG C of heating
Family name's body tissue or 100-200 DEG C/min cooling rates obtain bainite+martensitic structure, are tempered through 100 DEG C -400 DEG C；
(3) conventional air-cooled under 30-200 DEG C/min cooling rates after 900 DEG C of -920 DEG C of carburizings again.
2. a kind of air-cooled drilling tool steel of high-strength tenacity as described in claim 1, wherein：Sc comes from Al-Sc intermediate alloys, and Sc exists
Weight percent in intermediate alloy is 1.5-4%.
3. the production method of the air-cooled drilling tool steel of high-strength tenacity as described in claim 1, includes the following steps：
(1) use Al-Sc intermediate alloys as additive, weight percent of the Sc in intermediate alloy is 1.5-4%, in smelting
The intermediate alloy is added in molten steel after homogenization using insertion in refining process after refining deoxidation and obtains the steel containing Al-Sc
Ingot blank；
(2) steel ingot base is become a useful person through 1100 DEG C of forging rollings, then air-cooled, the 10-100 DEG C/min cooling rates acquisition shellfish after 880-900 DEG C of heating
Family name's body tissue or 100-200 DEG C/min cooling rates obtain bainite+martensitic structure, are tempered through 100 DEG C -400 DEG C；
(3) conventional air-cooled under 30-200 DEG C/min cooling rates after 900 DEG C of -920 DEG C of carburizings again.
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| CN105803326B true CN105803326B (en) | 2018-10-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397275A (en) * | 2013-08-09 | 2013-11-20 | 钢铁研究总院 | Martensite series wear-resistant steel and preparation method thereof |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103397275A (en) * | 2013-08-09 | 2013-11-20 | 钢铁研究总院 | Martensite series wear-resistant steel and preparation method thereof |
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