CN107974635A - Antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate and its production method - Google Patents
Antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate and its production method Download PDFInfo
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- CN107974635A CN107974635A CN201711221572.2A CN201711221572A CN107974635A CN 107974635 A CN107974635 A CN 107974635A CN 201711221572 A CN201711221572 A CN 201711221572A CN 107974635 A CN107974635 A CN 107974635A
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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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- 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
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- Crystallography & Structural Chemistry (AREA)
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- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention belongs to metal material field, and in particular to a kind of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate and its production method.For the problems such as existing brake rim strength of materials and wearability are bad, thermal fatigue resistance is poor, the present invention provides a kind of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate and its production method, and steel plate composition is：By weight percentage, C：0.32~0.42%, Si：0.20~0.35%, Mn：0.45~0.70%, Cr：1.00~1.15%, P：≤ 0.015%, S：≤ 0.006%, Mo：0.25~0.35%, Ni：0.10~0.20%, ∑ RE：0.015~0.050%, V：0.10~0.15%, Ti：≤ 0.015%, remaining is Fe and inevitable impurity.Heating-up temperature and rolling temperature are strictly controlled during production, the sparse cooling of laminar flow is used after finish rolling, the steel plate being prepared has the advantages that mechanical property is good, and wearability is high, can be used in brake rim, economic benefit is obvious.
Description
Technical field
The invention belongs to metal material field, and in particular to a kind of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate
And its production method.
Background technology
At present, domestic automobile-used brake drum, most of to use pearlite gray cast iron material, outer surface is mostly smooth structure,
The circumferential outer surface of small part product only has the rib parallel with brake drum axis of some longitudinal directions.Using the system of these structures
Dynamic drum is disadvantageous in that：1. easily cause to break off the base because material is unqualified；Tensile strength is too low；Easily cause because of thermal shock
Cracking and cracking.2. brake drum radiates not in time, heat passes to rapidly rubber tyre, causes tire pressure to raise, tyre break
Danger greatly increases, so as to reduce braking safety and reliability.In order to overcome drawbacks described above, to the property of brake rim material
The requirement of higher can be proposed.
The material of production brake rim mainly has ferrite cast iron, Lanzcast iron etc. at present.Ferrite cast iron is in heavily loaded work
Intensity and wearability deficiency when being used under condition, yielding, when machining, glues knife, poor surface smoothness；Lanzcast iron generally needs
Add the alloying elements such as Cr, Mo, RE, Cu and coordinate and be heat-treated, production cost is higher, and its thermal conductivity, intensity, wearability
Also below ferrite cast iron.
The patent of Application No. CN201410361786.X discloses a kind of steel plate, using Mn~Si~V~Re alloys, changes
Studying part (mass fraction) is:C:0.10~0.30%, Mn：1.2~2.0%, Si：0.20~0.50%, V：0.05~
0.20%, Re：0.10~0.040%, P≤0.025%, S≤0.025%, surplus Fe.The invention cost is low, heat treatment process
In employ quenching+high tempering, heat treatment process can only ensure material intensity and toughness it is comprehensive in σs≥530MPa、
σb>=735Mpa is horizontal.But the intensity of material, wearability and thermal fatigue property etc. be not also high in the patent, it is difficult to meet for a long time
Requirement.
The content of the invention
The technical problem to be solved in the present invention is：Existing the brake rim strength of materials and wearability are bad, thermal fatigue resistance
Can be poor the problems such as.
The present invention solve above-mentioned technical problem technical solution be：A kind of antifatigue high abrasion brake rim hot continuous rolling is provided
Alloy-steel plate and its production method.
The present invention provides a kind of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent is：By weight
Measure percentages, C：0.32~0.42%, Si：0.20~0.35%, Mn：0.45~0.70%, Cr：1.00~1.15%, P：
≤ 0.015%, S：≤ 0.006%, Mo：0.25~0.35%, Ni：0.10~0.20%, ∑ RE：0.015~0.050%, V：
0.10~0.15%, Ti：≤ 0.015%, remaining is Fe and inevitable impurity.
Preferably, above-mentioned antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent are：Percentage by weight
Than meter, by weight percentage, C：0.32~0.36%, Si：0.22~0.30%, Mn：0.50~0.60%, Cr：1.05~
1.12%, P：≤ 0.013%, S：≤ 0.004%, Mo：0.28~0.31%, Ni：0.12~0.16%, ∑ RE：0.025~
0.045%, V：0.13~0.15%, Ti：0.008~0.015%, remaining is Fe and inevitable impurity.
Present invention also offers a kind of production method of above-mentioned antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, bag
Include following steps：Desulfurizing iron-converter smelting top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, two
Secondary alloying-RH application of vacuum-hello calcium line-continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-laminar flow
Cool down-batch-packaging and storage；The slab heating temperature is 1200~1280 DEG C.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, the roughing uses 5
Passage or 7 passes, every time deflection >=18%.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, during the roughing in
Between base thickness be more than 4 times of finished product thickness.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, the finish rolling entrance
Temperature is 980~1030 DEG C, and finish rolling finishing temperature is 850~900 DEG C.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, layer is used after finish rolling
Flow the sparse type of cooling.
Beneficial effects of the present invention are：
The present invention is by controlling the chemical composition of steel in optimal level, using distinctive rolling mill practice, in the operation of rolling
In accurate control workpiece thickness, to ensure that the austenite recrystallization of roughing deformation process is complete, and adjusted using after stamping
Matter processing quenches+600 DEG C of high temperings by 900 DEG C, and obtained brake drum quality is small, mechanical performance is high, also has well
Thermal diffusivity, thermal fatigue resistance, wearability, structural homogenity and shock absorption.Using high fatigue life high abrasion produced by the invention
490~650MPa of yield strength, the 710~800MPa of tensile strength of property brake rim hot continuous rolling alloy coil of strip, meanwhile, punching press is turned over
Yield strength 1080MPa-1290MPa after the shaping rear braking brake drum modifier treatment of side, tensile strength 1300-1420MPa, prolongs
Rate A >=13%, -40 DEG C of low-temperature impact work >=40J are stretched, quenching hardness is generally HB480~590.At 650 DEG C, test always should
Under the conditions of becoming Δ ε as 0.25%, 30 times/min of the circulation frequency, high temperature low-cycle fatigue life performance >=1800 time, are suitable for use as stopping
Car drum is used, and has important economic benefit.
Embodiment
The present invention provides a kind of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent is：By weight
Measure percentages, C：0.32~0.42%, Si：0.20~0.35%, Mn：0.45~0.70%, Cr：1.00~1.15%, P：
≤ 0.015%, S：≤ 0.006%, Mo：0.25~0.35%, Ni：0.10~0.20%, ∑ RE：0.015~0.050%, V：
0.10~0.15%, Ti：≤ 0.015%, remaining is Fe and inevitable impurity.
Preferably, above-mentioned antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent are：Percentage by weight
Than meter, by weight percentage, C：0.32~0.36%, Si：0.22~0.30%, Mn：0.50~0.60%, Cr：1.05~
1.12%, P：≤ 0.013%, S：≤ 0.004%, Mo：0.28~0.31%, Ni：0.12~0.16%, ∑ RE：0.025~
0.045%, V：0.13~0.15%, Ti：0.008~0.015%, remaining is Fe and inevitable impurity.
The present invention provides a kind of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, steel plate thermal fatigue property is influenced
Factor it is more, be broadly divided into two kinds：First, external factor, refers to experimental facilities and experimental situation；Second, internal factor, refers to material
The influence (microstructure, physical property, chemical composition, mechanical property etc.) of itself.In the case that operating mode is certain, material it is interior
Portion's factor plays a major role.The chemical composition of material is different, its antifatigue performance is also different.The content of alloying elements and
Existing state has a great influence the thermal fatigue resistance of material.In steel, alloying element forms carbide with carbon, this
Shape, the size and number of a little carbide all drastically influence the thermal fatigue resistance of material, some are exactly formation of crack, accelerate to split
Line germinates.
The present invention adds the rare earth element of appropriate amount in steel plate component, and rare earth element (RE) is micro in steel to be dissolved, is net
Change crystal boundary, rotten field trash, crystallization of refinement tissue, so as to improve the mechanical performance of steel, the resistance to high temperature oxidation of heat resisting steel can be improved
Performance and wearability, creep strength, thermal fatigue property etc..Rare earth element can delay carbide intercrystalline precipitation in alloy, hinder
Carbide is grown up, and improves form and the distribution of carbide.Under certain heat treatment, rare earth can also improve the crystal boundary shape of steel
State, strengthens crystal boundary and hinders the formation and extension of grain-boundary crack.Rare earth element can also weaken or eliminate since phosphorus etc. is miscellaneous at the same time
The reversible temper brittleness of low-alloy steel caused by segregation of the prime element in crystal boundary.
In the present invention, steel plate materials use the alloy design technology route of Cr-Mo-RE-Ni-V and combine sheet slab continuous casting
Base is implemented to produce in generous hot tandem rolling mill, and the steel new brake that the new process of stamping rear modifier treatment makes is braked
Drum, not only quality is small, will also there is enough mechanical performances, good heat dissipation performance and thermal fatigue characteristics, good wearability
And occlusion ability, even tissue and good shock absorption.
Present invention also offers a kind of production method of above-mentioned antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, bag
Include following steps：Desulfurizing iron-converter smelting top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, two
Secondary alloying-RH application of vacuum-hello calcium line-continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-laminar flow
Cool down-batch-packaging and storage.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, the slab adds
Hot temperature is 1200~1280 DEG C.Slab obtained by continuous casting is heated to 1200~1280 DEG C of insulation roughing, according to finished product thickness
Difference, the slab of 200~250mm thickness pass through 5 passages or 7 passage roughing, and every time deflection is necessary >=and 18%, ensure austenite
Recrystallization, fining austenite grains.Different according to finished product thickness, workpiece thickness is different, but workpiece thickness must be in finished product
More than 4 times of thickness.
Steel billet after roughing then carries out Coil Box and batches, and the Coil Box is the steel-making common Coil Box of industry,
Such as mandrelless transform Coil Box.Base exchanges end to end among being realized in the Coil Box, to ensure that the elongated temperature of steel billet is uniform；
Secondary oxidation iron sheet is removed to ensure that steel billet plate face is bright and clean at the same time.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, the finish rolling entrance
Temperature is 980~1030 DEG C, and finish rolling finishing temperature is 850~900 DEG C.
Wherein, in production method of the above-mentioned antifatigue high abrasion brake rim with hot continuous rolling alloy-steel plate, layer is used after finish rolling
Flow the sparse type of cooling.
The equipment that the present invention uses connects for steel-making industry common device, including common mammoth conveter (>=220t), sheet slab
Casting machine 250*1950mm types casting machine, common wide steel hot tandem (walking beam heating furnace, reversing rougher, finishing tandem rolling
Unit, coiling machine), traditional 2050 hot continuous rolling production line of strip etc..
Explanation will be further explained to the embodiment of the present invention by embodiment below, but do not indicated that this
The protection domain of invention is limited in described in embodiment in scope.
Embodiment 1~3 prepares high-wearing feature brake rim hot continuous rolling alloy-steel plate using the method for the present invention
Using chemical composition steel production steel plate as shown in Table 1, specific operating process is：Desulfurizing iron-converter smelting
Top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, secondary alloyed-RH application of vacuum-feed calcium line-company
Casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-section cooling-and batches-packaging and storage.
The chemical composition of 1 embodiment of table
| Embodiment | C | Si | Mn | Cr | P | S | Mo | Ni | RE | V | Ti |
| 1 | 0.32 | 0.21 | 0.51 | 1.02 | 0.012 | 0.003 | 0.28 | 0.14 | 0.030 | 0.12 | 0.015 |
| 2 | 0.33 | 0.22 | 0.52 | 1.05 | 0.011 | 0.003 | 0.28 | 0.14 | 0.033 | 0.12 | 0.014 |
| 3 | 0.35 | 0.24 | 0.56 | 1.10 | 0.011 | 0.002 | 0.30 | 0.16 | 0.042 | 0.13 | 0.014 |
| Comparative example 1 | 0.33 | 0.21 | 0.57 | 1.01 | 0.015 | 0.005 | 0.26 | 0.12 | Do not add | Do not add | 0.011 |
| Comparative example 2 | 0.35 | 0.22 | 0.60 | 1.03 | 0.014 | 0.005 | 0.27 | 0.13 | Do not add | Do not add | 0.013 |
Wherein, the rolling thickness of roll of steel plate, heating-up temperature, thickness, start rolling temperature and the finishing temperature such as institute of table 2 of middle base
Show.Roughing uses five passage de-scalings during rolling, ensures dephosphorization water pressure >=22MPa, ensures scale removal effect.Workpiece thickness presses table
3 controls.
Finish rolling：Mm finishing mill unit >=4 rack cooling water is opened, and puts into middle pressure de-scaling water between F1 racks.
The hot rolling technology controlling value of 2 embodiment of table
The control of 3 workpiece thickness of table requires
| Finished product thickness/mm | Workpiece thickness/mm | Remarks |
| 4.0~7.0 | 42±1 | Put into hot rolling box function |
| 7.0~8.0 | 44±1 | Put into hot rolling box function |
| 8.0~14.0 | 46~50 | —— |
| 14.0~18.0 | 52±1 | —— |
Comparative example 1~2 does not use the method for the present invention hot continuous rolling alloy-steel plate
In comparative example, prepare that the constituent of steel plate is as shown in table 1, the parameter of hot rolling technology is as shown in table 2, remaining step
Same embodiment.
The roll of steel plate produced to embodiment 1~3, comparative example 1~2 carries out performance measurement, and the assay method of mechanical property is adopted
Carried out with the method for GB/T 228, GB/T 232, the assay method of high temperature low-cycle fatigue life performance is：At 650 DEG C, test
The fatigue life that overall strain Δ ε is 0.25%, is obtained under the conditions of 30 times/min of the circulation frequency.Performance measurement result is as shown in table 4.
Mechanical property after 4 embodiment coil of strip (plate) of table is quenched
From embodiment and the result of comparative example：Using the method for the present invention, brake rim hot continuous rolling can be significantly improved
The intensity level of alloy-steel plate and low fatigue behaviour.
Claims (7)
1. antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate, it is characterised in that constituent is：By weight percentage
Meter, C：0.32~0.42%, Si：0.20~0.35%, Mn：0.45~0.70%, Cr：1.00~1.15%, P：≤
0.015%, S：≤ 0.006%, Mo：0.25~0.35%, Ni：0.10~0.20%, ∑ RE：0.015~0.050%, V：
0.10~0.15%, Ti：≤ 0.015%, remaining is Fe and inevitable impurity.
2. antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 1, it is characterised in that composition into
It is divided into：By weight percentage, C：0.32~0.36%, Si：0.22~0.30%, Mn：0.50~0.60%, Cr：1.05~
1.12%, P：≤ 0.013%, S：≤ 0.004%, Mo：0.28~0.31%, Ni：0.12~0.16%, ∑ RE：0.025~
0.045%, V：0.13~0.15%, Ti：0.008~0.015%, remaining is Fe and inevitable impurity.
3. the production method of the antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate described in claim 1 or 2, its feature exist
In comprising the following steps：Desulfurizing iron-converter smelting top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electricity add
Hot, secondary alloyed-RH application of vacuum-hello calcium line-continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-essence
Roll-section cooling-and batch-packaging and storage；The slab heating temperature is 1200~1280 DEG C.
4. the production method of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, its feature
It is：The roughing uses 5 passages or 7 passes, every time deflection >=18%.
5. the production method of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, its feature
It is：Workpiece thickness is more than 4 times of finished product thickness during the roughing.
6. the production method of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, its feature
It is：The entry temperature at finishing is 980~1030 DEG C, and finish rolling finishing temperature is 850~900 DEG C.
7. the production method of antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, its feature
It is：The sparse type of cooling of laminar flow is used after finish rolling.
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| CN110899329A (en) * | 2019-10-25 | 2020-03-24 | 邯郸钢铁集团有限责任公司 | Method for producing brake pad back steel based on CSP continuous casting and rolling production line |
| CN110899329B (en) * | 2019-10-25 | 2021-08-20 | 邯郸钢铁集团有限责任公司 | Method for producing brake pad back steel based on CSP continuous casting and rolling production line |
| CN114000058A (en) * | 2021-11-03 | 2022-02-01 | 西安法士特汽车传动有限公司 | Rare earth alloyed steel, nitriding method thereof and nitrided steel part |
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