CN109023067A - A kind of high-strength, high-anti-friction type motor vehicle wheels steel and its manufacturing method - Google Patents
A kind of high-strength, high-anti-friction type motor vehicle wheels steel and its manufacturing method Download PDFInfo
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- CN109023067A CN109023067A CN201811018462.0A CN201811018462A CN109023067A CN 109023067 A CN109023067 A CN 109023067A CN 201811018462 A CN201811018462 A CN 201811018462A CN 109023067 A CN109023067 A CN 109023067A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
- C21C7/10—Handling in a vacuum
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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Abstract
The invention discloses a kind of high-strength, high-anti-friction type motor vehicle wheels steel and its manufacturing methods, pass through electric furnace smelting, the refining of LF furnace; VD degassing, argon for protecting pouring, electroslag furnace under protective Ar gas remelting reduce the amount of inclusions and control field trash shape; High temperature diffusion, forging, annealing carry out the manufacture of wheel steel.It can get that matrix is pure using technical solution of the present invention, the high-strength, high-anti-friction type motor vehicle wheels steel of even tissue.Its tensile strength can meet 900-1050MPa, and yield strength can achieve 550-700Mpa, and elongation at break reaches 16% or more, and 20 DEG C of room temperature, KU average impact value is 21J or more, and KV-20 DEG C of average impact value of low temperature is 11J；Wheel rim fracture toughness average value is 80MPam1/2More than.Wear-resisting property promotes 10% or more compared with conventional vehicle wheel under rolling friction experimental condition.
Description
Technical field
The present invention relates to a kind of rings domain used for high-speed railway, especially a kind of high-strength, high-anti-friction type motor vehicle wheels steel and its
Manufacturing method
Background technique
Wheel is the important composition component of train, and abrasion, fatigue and the mechanical damage of wheel directly affect it and use the longevity
Life and traffic safety.Result of study shows that the speed of service is more than the dynamic conditions generation significant changes of train after 120km/h,
Significant changes also occur for the use condition of wheel.With the raising of train running speed, the abrasion between wheel and rail aggravates,
And in high-speed wheel braking process, a large amount of frictional heat is generated, the failure for exacerbating the initiations such as fatigue, the removing of wheel is asked
Topic needs wheel to come load capacity, high tenacity with high intensity to guarantee that wheel is transported the bullet train of 300km/h or more
Capable reliability is prolonged the service life with high wearability.
Summary of the invention
The purpose of the present invention is to provide a kind of high-strength, high-anti-friction type motor vehicle wheels steel and its manufacturing methods, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme: a kind of high-strength, high-anti-friction type motor vehicle wheels steel and
Its manufacturing method, weight percent meter chemical composition content: C0.54-0.62%, Si0.12-0.38%, Mn0.3-0.7%,
Cr0.12-0.28%, Mo < 0.06%, V < 0.05%, Cu < 0.08%, Ni 0.12-0.20%, P < 0.0150%, S <
0.0010%, 0 < 0.0010%, N < 0.0070%, rare earth 0.002%-0.005%, 21.3≤5.4+17*C+2.4*Si+
7.3*Mn+5.6*Cr+41*Mo+37*V+11*Ni≤31.4, surplus is Fe and impurity.
Its weight percent meter chemical composition content: C0.55%, Si0.18%, Mn0.6%, Cr0.18%,
Mo0.05%, Ni 0.14%, P0.012%, S0.0008%, 00.0006%, N0.0065%, surplus are Fe and impurity.
Its weight percent meter chemical composition content: C0.57%, Si0.28%, Mn0.7%, Cr0.15%,
MoO.05%, Ni 0.17%, P0.013%, S0.0007%, 00.0005%, N0.0060%, surplus are Fe and impurity.
Its weight percent meter chemical composition content: C0.59%, Si0.22%, Mn0.5%, Cr0.20%,
Mo0.06%, Ni 0.15%, P0.013%, S0.0007%, 00.0009%, NO.0061%, surplus are Fe and impurity.
Preferably, 0.002-0.005% rare earth is added in steel grade.
Its oxygen sulfur content is respectively less than 0.0010%.
Nitrogen in steel content is less than 0.0070%.
In the case of its tensile strength meets 900-1050MPa, yield strength reaches 550-700Mpa, and elongation at break reaches
16%-21%, 20 DEG C of room temperature, KU average impact value is 17-22J, and KV-20 DEG C of low temperature, average impact value is 9-13J.
Including following procedure and step:
1) electric furnace and the refining of LF furnace: according to above-mentioned weight percent meter chemical composition content: C0.54-0.62%,
Si0.12-0.38%, Mn0.3-0.7%, Cr0.12-0.28%, Mo < 0.06%, V < 0.05%, Cu < 0.08%, Ni
0.12-0.20%, remaining carries out ingredient for Fe, by electric furnace, then control tapping P < 0.015% is adjusted by LF refining and closed
Golden ingredient and desulfurization control S < 0.003%；
2) VD deaerates and adds rare earth: controlling oxygen content in steel less than 0.0020% by VD furnace, nitrogen is less than 0.0070%；Control
Content of rare earth is in 0.002-0.005% in steel processed；
3) argon for protecting pouring: being poured under protection of argon gas, prevents the oxygen dissolved in atmosphere in steel and nitrogen.
4) atmosphere protection electroslag: oxygen content in steel can be controlled below 0.0010% by atmosphere protection electroslag；Sulphur
Content controls below 0.0010%.
5) steel ingot High temperature diffusion: is subjected to High temperature diffusion, soaking time at 1000-1220 DEG C are as follows: 7-14 hours, eliminate
Aliquation carbide, mitigation interdendritic segregation in process of setting；
6) it forges: steel ingot is forged, 1050-1180 DEG C keeps the temperature 5 hours, and 980-1150 DEG C is opened forging, and final forging temperature is big
In 800 DEG C；Improve structural homogenity by forging；
7) spheroidizing: 200-600 DEG C of shove charge, heating speed spend 710 DEG C -730 DEG C of heat preservations 8-15 hours less than 80 DEG C/h,
With less than 35 DEG C cooling rate slow cooling to 300 DEG C, come out of the stove air-cooled.
Compared with prior art, the beneficial effects of the present invention are: the present invention carries out electrode base metal casting under protection of argon gas,
Prevent the oxygen dissolved in atmosphere in steel and nitrogen.
Using inert atmosphere or vacuum, electroslag remelting process is protected to melt steel again, first with electroslag remelting mistake
Large-sized inclusions in journey in slag gold interfacial reaction Adsorption steel matrix；Secondly, passing through slag blanket in molten steel falls into crystallizer,
Again during solidifying, using inductance suppression technology, molten steel turbulence disturbance is reduced, oxide is mingled with guarantor in stable molten steel
Floating straight up is held, the probability impinging one another grown up is reduced, while effectively inhibiting the reunion or aggregation effect of field trash
It answers.By protective atmosphere remelting, oxygen content in steel is reduced to 0.0010% or less and controls oxide inclusion quantity, and oxide
It is smaller to be mingled with size.And sulfur content is also controlled 0.0010% hereinafter, the harm for essentially eliminating element sulphur to steel matrix.
Detailed description of the invention
Fig. 1 is experimental chemistry ingredient schematic table of the invention；
Fig. 2 is experimental result properties schematic table of the invention；
Wherein: chemical component unit are as follows: %.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution: the content of steel grade alloy is determined according to each alloys producing:
Carbon: carbon is to improve material harden ability, is intensity, hardness and the most important element of wearability for improving steel, simultaneously
Wheel steel will improve as far as possible the toughness of wheel steel on the basis of meeting strength demand, improve resistance to crack extension ability and contact
Fatigue behaviour.Carbon content is excessively high to will cause that intensity index is excessively high and toughness is lower, therefore carbon content control are as follows: 0.54%-
0.62%
Silicon: silicon is added in steel other than playing deoxidation, silicon plays solution strengthening effect also into matrix, improves the strong of steel
Degree and wearability.Also make to be not susceptible to austenite phase transformation, martensite transfor mation when wheel steel is heated, cooling simultaneously, helps to improve
The heat resistanceheat resistant damage performance of steel, but excessively high silicon will increase the heat sensitivity and brittleness of material.Therefore silicone content is controlled into 0.12-
0.38%.
Manganese: there is stronger solid solution strengthening effect, the phase transition temperature of steel can be reduced, improve the harden ability of steel, and and carbon
In conjunction with carbide is formed to improve the wearability of steel.Manganese content is controlled in 0.3-0.7%.
Chromium: the harden ability of steel can be improved in medium carbide former.Chromium can homogenize point of carbide in steel simultaneously
Cloth reduces carbide size, and so as to improve the abrasion resistance properties of wheel steel, chromium can dissolve in ferrite the effect for generating solution strengthening
Fruit carries ferritic intensity, slows down the germinating and propagation of fatigue crack.There are a large amount of martensites compared with Gao Shiyi in chromium content, because
This, Cr is controlled in 0.12-0.28%.
Molybdenum: molybdenum improves harden ability and intensity, and content height can reduce the toughness of steel, controls less than 0.06%.
Nickel: the nickel in steel can reduce phase transition temperature, refine pearlite piece interlamellar spacing, promote the mechanical property of steel.It can drop
Low-heat processing when hardening heat, therefore heat treatment when deform it is small.The plasticity and toughness of steel, especially low-temperature flexibility can be improved.It should
It is controlled in steel are as follows: Ni 0.12-0.20%
Rare earth: rare earth easily in steel sulphur, high-melting-point rare earth oxide, rare-earth sulfide, rare earth sulphur oxygen are generated in conjunction with oxygen
Compound, rare earth silicate, these substances can be used as non-white hair crystallization nuclei during solidification of molten steel, promote crystal grain in steel thin
Change.Meanwhile rare earth element can purify matrix, improve degree of purity.
Sulphur, phosphorus, nitrogen, oxygen: harmful element, unfavorable to the toughness of steel, the control of this product phosphorus content is 0.015% hereinafter, sulphur
0.0010% hereinafter, nitrogen 0.0080% hereinafter, 0.001% or less oxygen.
1) electric furnace and the refining of LF furnace: according to above-mentioned weight percent meter chemical composition content: C0.54-0.62%,
Si0.12-0.38%, Mn0.3-0.7%, Cr0.12-0.28%, Mo < 0.06%, V < 0.05%, Cu < 0.08%, Ni
0.12-0.20%, remaining carries out ingredient for Fe, by electric furnace, then control tapping P < 0.015% is adjusted by LF refining and closed
Golden ingredient and desulfurization control S < 0.003%；
2) VD deaerates and adds B: controlling oxygen content in steel less than 0.0020% by VD furnace, nitrogen is less than 0.0070%；In VD
Rare earth recombination line is added in furnace, content of rare earth is in 0.003-0.009% in control steel；
Argon for protecting pouring: being poured under protection of argon gas, prevents the oxygen dissolved in atmosphere in steel and nitrogen.
Atmosphere protection electroslag: oxygen content in steel can be controlled 0.0020% hereinafter, base steel at this time by vacuum refining
The degree of purity of body has reached higher level, and oxide is mingled with quantity and significantly reduces, but vacuum refining is difficult control oxide
The distributional pattern being mingled with, i.e., there are still destructive greatly large scale oxides to be mingled in steel；On the other hand, due to molten steel
Turbulent flow is easy to appear chain or band dress aggregation that oxide is mingled in steel, bigger to the progressive failure of steel matrix.Cause
This protects electroslag remelting process to melt steel again, first with slag in esr process using inert atmosphere or vacuum
Large-sized inclusions in golden interfacial reaction Adsorption steel matrix；Secondly, passing through slag blanket in molten steel falls into crystallizer, coagulate again
Solid process in, using inductance suppression technology, reduce molten steel turbulence disturbance, it is vertical to be mingled with holding for oxide in stable molten steel
Upward floating, while effectively inhibiting the reunion or building-up effect of field trash.Pass through protective atmosphere remelting, oxygen content in steel drop
Oxide inclusion quantity is controlled as low as 0.0010% or less, and to be mingled with size smaller for oxide.And sulfur content also controls
0.001% hereinafter, essentially eliminate harm of the element sulphur to steel matrix.
High temperature diffusion: steel ingot is subjected to High temperature diffusion, soaking time at 1000-1220 DEG C are as follows: 7-14 hours, eliminate solidifying
Aliquation carbide, elimination interdendritic segregation during Gu.
Six sides forging: 6 face forgings are carried out to steel ingot, 1050-1180 DEG C keeps the temperature 5 hours, and 980-1150 DEG C is opened forging, finish-forging temperature
Degree is greater than 800 DEG C.Improve structural homogenity by six sides forging.
Spheroidizing: 200-600 DEG C of shove charge, heating speed less than 80 DEG C/h, 710 DEG C -730 DEG C of heat preservations 8-15 hours, with small
In 35 DEG C of cooling rate slow cooling to 300 DEG C, come out of the stove air-cooled.
The not disconnected rate of high cycle fatigue 106, which is measured, by EN1002-1 method reaches 99.5%.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of high-strength, high-anti-friction type motor vehicle wheels steel and its manufacturing method, it is characterised in that: its weight percent meter chemistry
Component content: C0.54-0.62%, Si0.12-0.38%, Mn0.3-0.7%, Cr0.12-0.28%, Mo < 0.06%, V <
0.05%, Cu < 0.08%, Ni 0.12-0.20%, P < 0.0150%, S < 0.0010%, 0 < 0.0010%, N <
0.0070%, rare earth 0.002%-0.005%, 21.3≤5.4+17*C+2.4*Si+7.3*Mn+5.6*Cr+41*Mo+37*V+
11*Ni≤31.4, surplus are Fe and impurity.
2. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
Its weight percent meter chemical composition content: C0.55%, Si0.18%, Mn0.6%, Cr0.18%, Mo0.05%, Ni
0.14%, P0.012%, S0.0008%, 00.0006%, N0.0065%, surplus are Fe and impurity.
3. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
Its weight percent meter chemical composition content: C0.57%, Si0.28%, Mn0.7%, Cr0.15%, Mo0.05%, Ni
0.17%, P0.013%, S0.0007%, 00.0005%, N0.0060%, surplus are Fe and impurity.
4. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
Its weight percent meter chemical composition content: C0.59%, Si0.22%, Mn0.5%, Cr0.20%, Mo0.06%, Ni
0.15%, P0.013%, S0.0007%, 00.0009%, N0.0061%, surplus are Fe and impurity.
5. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, which is characterized in that
Preferably, 0.002-0.005% rare earth is added in steel grade.
6. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
Its oxygen sulfur content is respectively less than 0.0010%.
7. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
Steel grade nitrogen content is less than 0.0070%.
8. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
In the case of its tensile strength meets 900-1050MPa, yield strength reaches 550-700Mpa, and elongation at break reaches 16%-
20 DEG C of average impact values are 17-22J when 21%, room temperature KU, and KV-20 DEG C of average impact value of low temperature is 9-13J.
9. a kind of high-strength, high-anti-friction type motor vehicle wheels steel according to claim 1 and its manufacturing method, it is characterised in that:
Including following procedure and step:
1) electric furnace and the refining of LF furnace: according to above-mentioned weight percent meter chemical composition content: C0.54-0.62%, Si0.12-
0.38%, Mn0.3-0.7%, Cr0.12-0.28%, Mo < 0.06%, V < 0.05%, Cu < 0.08%, Ni 0.12-
0.20%, remaining carries out ingredient for Fe, by electric furnace, control tapping P < 0.015%, then by LF refining adjustment alloy at
Point and desulfurization, control S < 0.003%；
2) VD deaerates and adds rare earth: controlling oxygen content in steel less than 0.0020% by VD furnace, nitrogen is less than 0.0070%；Control steel
Middle content of rare earth is in 0.002-0.005%；
3) argon for protecting pouring: being poured under protection of argon gas, prevents the oxygen dissolved in atmosphere in steel and nitrogen.
4) atmosphere protection electroslag: oxygen content in steel can be controlled below 0.0010% by vacuum refining；And sulfur content
Also it controls below 0.0010%.
5) steel ingot High temperature diffusion: is subjected to High temperature diffusion, soaking time at 1000-1220 DEG C are as follows: 7-14 hours, eliminate solidification
Aliquation carbide, elimination interdendritic segregation in the process；
6) it forges: steel ingot is forged, 1050-1180 DEG C keeps the temperature 5 hours, and 980-1150 DEG C is opened forging, and final forging temperature is greater than 800
℃；Improve structural homogenity by forging；
7) anneal: 200-600 DEG C of shove charge, heating speed less than 80 DEG C/h, 710 DEG C -730 DEG C of heat preservations 8-15 hours, less than 35 DEG C
Cooling rate slow cooling is come out of the stove air-cooled to 300 DEG C.
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| CN201811018462.0A CN109023067B (en) | 2018-08-31 | 2018-08-31 | High-strength high-wear-resistance bullet train wheel steel and manufacturing method thereof |
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| CN201811018462.0A CN109023067B (en) | 2018-08-31 | 2018-08-31 | High-strength high-wear-resistance bullet train wheel steel and manufacturing method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469091A (en) * | 2013-08-22 | 2013-12-25 | 马钢(集团)控股有限公司 | Large size rolled steel integral wheel used for railway vehicle and production method thereof |
| CN105886933A (en) * | 2016-05-12 | 2016-08-24 | 天津钢研海德科技有限公司 | High tempering softness resistance and high tenacity hot-work die steel and manufacturing method thereof |
-
2018
- 2018-08-31 CN CN201811018462.0A patent/CN109023067B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469091A (en) * | 2013-08-22 | 2013-12-25 | 马钢(集团)控股有限公司 | Large size rolled steel integral wheel used for railway vehicle and production method thereof |
| CN105886933A (en) * | 2016-05-12 | 2016-08-24 | 天津钢研海德科技有限公司 | High tempering softness resistance and high tenacity hot-work die steel and manufacturing method thereof |
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