CN103952637A - Brake disc material for forging high-speed train - Google Patents
Brake disc material for forging high-speed train Download PDFInfo
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- CN103952637A CN103952637A CN201410155628.9A CN201410155628A CN103952637A CN 103952637 A CN103952637 A CN 103952637A CN 201410155628 A CN201410155628 A CN 201410155628A CN 103952637 A CN103952637 A CN 103952637A
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Abstract
The invention discloses a brake disc material for forging a high-speed train. The brake disc material comprises the following components by mass percent: 0.16%-0.25% of C, 0.25%-0.60% of Si, 0.80%-1.30% of Mn, 0.70%-1.20% of Cr, 0.01%-0.03% of W, 0.80%-1.30% of Ni, 0.40%-0.70% of Mo, 0.05%-0.20% of Cu, 0.18%-0.25% of SiC, 0.20%-0.30% of Al2O3, 0.03%-0.15% of V, 0.0050%-0.025% of N, 0.005%-0.20% of Re, not more than 0.015% of P, not more than 0.010% of S and the balance of Fe. The brake disc material is high in wear resistance and good in thermal cracking resistance, the high-speed train can be safely and reliably braked, and the use and repair costs of the high-speed train are reduced.
Description
Technical field
The present invention relates to high-speed train braking device, relate in particular to the material of retarding disc in high-speed train braking device.
Background technology
Brake disc of high-speed train body material capability is one of technical problem the most key in drift stop.Under and damped condition that operational conditions is severe high in bullet train speed, huge braking thermal load and thermal shocking meeting bring very high thermal stresses and thermograde.Therefore disc material must have good mechanical behavior under high temperature and heat conductivility, and low elastic modulus and low thermal coefficient of expansion, makes to brake heat loss rapidly, and disc material also should have higher thermal fatigue strength and braking life-span.Specifically, brake disc of high-speed train should have following performance: the one, and stable and uniform frictional behaviour, frictional coefficient does not change with the variation of pressure, temperature and speed; The 2nd, good fatigue performance and fabulous heat resistanceheat resistant crackle extended capability, the high thermal stress being formed to reduce retarding disc friction surface rapid heat cycle; The 3rd, higher wear resisting property, the wearing and tearing that produce to reduce card friction; Disc material also should have good friction resistant thermal deformation behavior and thermal conductivity.
At present Materials for High-speed Train Brake Discs is mainly taking ferrous material and steel based material as main.Ferrous material mainly contains high-strength gray cast iron, vermicular cast iron and spheroidal graphite cast iron; Carbon steel, steel alloy and Alloy Cast Steel material in steel based material is that brake disc of high-speed train uses material the most widely.In order to meet the constantly requirement of speed-raising of train, develop again cast iron---cast steel built-up type retarding disc.With regard to brake disc structure, due to retarding disc structure in the form of annular discs, retro-speed on retarding disc surface of friction on different circumference is widely different, thereby form inhomogeneous thermal stresses, in braking centre, its temperature is little more a lot of than the outside of dish, and the retarding disc that homogeneous material is made is because the resistance toheat of each several part is all consistent with wear resisting property, this consistent performance has exactly brought the inconsistent of tired and abrasion loss, accelerate on the contrary thermal crack and occurred probability and propagation rate, be unfavorable for the retarding disc raising in work-ing life.Therefore along with the continuous speedup of train, when its speed reaches even higher than 300Km/h, existing disc material and structure design can not meet high-speed train braking requirement well.So high-speed train braking friction materials should be by single material, low heat capacity, low high temperature specific tenacity, low heat-resistant cracking to segmentation material, high heat capacity, high specific strength, the high heat-resisting future development splitting.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of bullet train forging disc material with high-wear resistance and good heat crack resistance.
Bullet train forging disc material of the present invention, the component of this disc material and mass percent (Wt%) are: C:0.16～0.25, Si:0.25～0.60, Mn:0.80～1.30, Cr:0.70～1.20, W:0.01～0.03, Ni:0.80～1.30, Mo:0.40～0.70, Cu:0.05～0.20, Si C:0.18～0.25, Al2O3:0.20～0.30, V:0.03～0.15, N:0.0050～0.025, Re:0.005～0.20, P≤0.015, S≤0.010, surplus is Fe.
In technical scheme of the present invention, owing to passing through the analysis to above-mentioned alloying element disc material Effect on Mechanical Properties, and in conjunction with brake disc of high-speed train, the requirement of material capability is determined to above-mentioned material component and composition ratio, make it not only there is the high-temperature mechanics character, cold-and-heat resistent fatigue property and the physical and mechanical property that adapt to high-speed train braking device, and there is high-wearing feature, low thermal coefficient of expansion, high thermal conductivity coefficient.Therefore alloy material of the present invention can be at life-time service under High Temperature High Pressure, is the desirable disc material for bullet train.Especially SiC and Al2O3 in alloy material of the present invention have high-wearing feature, high strength, high rigidity and low-expansion coefficient, SiC at high temperature still can keep its intrinsic hardness and intensity, in alloy material, add SiC and make its thermal conductivity very high, thermal expansion is again little, heat-shock resistance is very high.And Al2O3 wherein has again good heat conductivility and lower density; The interpolation of the element such as Ni, Cr makes again alloy material of the present invention have good to resistance to wear, heat crack resistance, and frictional coefficient is steady, is not vulnerable to the impact of outside atmosphere.Rare earth elements RE can not only crystal grain thinning, improves crystal boundary bonding strength, the over-all properties of strongthener, and also RE can play the effect of solution strengthening and dispersion-strengthened, thus improve mechanical property and the erosion resistance of alloy material.In the present invention, the mechanism of action of principal element is as follows:
Carbon (C): carbon is the one of the chief elements in alloy material, material property is decided by its content and distribution form in steel to a great extent; Carbon is the element of stable austenite, and effect degree is very large; In material, the content of carbon increases, and yield-point and tensile strength raise, and plasticity and impelling strength can decline.
Silicon (Si): silicon is as reductive agent and reductor cleaning molten steel, and silicon is ferrite former, part silicon and carbon form the SiC of high hard high-strength wearable.
Manganese (Mn): manganese is the effect with strong stable austenite, can significantly improve the solubleness of N in austenitic steel.
Chromium (Cr): chromium increases the perviousness of steel and has secondary hardening effect, can improve intensity, hardness and the wear resistance of steel; Chromium can also improve the hot strength of steel, is the important element of high temperature steel.
Tungsten (W): tungsten is strengthened carbide forming element, has added the tungsten of aforementioned proportion in the present invention, reached thinning microstructure crystal grain, improves the effect of intensity and toughness.
Nickel (Ni): nickel refinement ferrite crystal grain, under the identical condition of intensity, nickel can improve steel plasticity and toughness, particularly low-temperature flexibility; It is combined use and improves again the heat of steel strong and normal temperature strength and solidity to corrosion with Cr, Mo.
Molybdenum (Mo): molybdenum makes the grain refining of steel, perviousness and the red hardness of raising material, make alloy material can in the time of high temperature, keep enough intensity and creep resisting abilities.
Copper (Cu): the appropriate interpolation of copper has improved the resistance to atmosphere of alloy material, acid-and base-resisting corrodibility, copper can also strongthener thermal shock resistance, improves material thermal conductivity and heat impedance.
Vanadium (V): the carbide that vanadium and carbon form can improve the anti-hydrogen-type corrosion ability of steel under High Temperature High Pressure.
Nitrogen (N): nitrogen can improve the corrosion resistance nature of steel, particularly intergranular corrosion resistance pitting attack and crevice corrosion behavior, stop the expansion of hot tearing.
A kind of preferred implementation of the present invention is divided into A, B, tri-material areas of C on same retarding disc, and the component of described A material area and mass percent (Wt%) are: C:0.16, Si:0.25, Mn:0.80, Cr:0.70, W:0.01, Ni:0.80, Mo:0.40, Cu:0.05, SiC:0.18, Al2O3:0.20, V:0.03, N:0.0050, Re:0.005, P≤0.015, S≤0.010, surplus is Fe; The component of described B material area and mass percent (Wt%) are: C:0.20, Si:0.45, Mn:1.10; Cr:0.95, W:0.02, Ni:1.05; Mo:0.550, Cu:0.10, SiC:0.20; Al2O3:0.25, V:0.10, N:0.01; Re:0.10; P≤0.015, S≤0.010, surplus is Fe; The component of described C material area and mass percent (Wt%) are: C:0.25, Si:0.60, Mn:1.30, Cr:1.20, W:0.03, Ni:1.30, Mo:0.70, Cu:0.20, SiC:0.25, Al2O3:0.30, V:0.15, N:0.025, RE:0.20, P≤0.015, S≤0.010, surplus is Fe.Described retarding disc is the disc structure with disk body mesopore, and A, B on described retarding disc, tri-material areas of C are adjacent three annulus successively; Annular radii Ra:r≤Ra < of described A material area r+1/3(R-r) ］; The annular radii Rb of described B material area: r+1/3(R-r) ］≤Rb < r+2/3(R-r) ］; ; The annular radii Rc of described C material area: r+2/3(R-r) ］≤Rc≤R.This working of an invention scheme varies in size and adopts different material components according to retarding disc different temperature province, thermal stresses in the time braking, thereby makes retarding disc have better overall wear resistance and heat crack resistance.
Brief description of the drawings
Fig. 1 adopts the brake disc structure schematic diagram of material of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Brake disc of high-speed train as shown in Figure 1.On the disk body surface of friction of this retarding disc, be provided with open holes, retarding disc disk body radius is r, retarding disc disk body is divided into A, B, tri-of C and has the material area of same material component different components per-cent.This A, B, tri-material areas of C are three adjacent successively annulus, and braking disk body can be assembled by three annulus, also can be formed by the territory solid forging of different components per-cent material partition.On same retarding disc, be divided into A, B, tri-material areas of C, the component of described A material area and mass percent (Wt%) are: C:0.16, Si:0.25, Mn:0.80, Cr:0.70, W:0.01, Ni:0.80, Mo:0.40, Cu:0.05, SiC:0.18, Al2O3:0.20, V:0.03, N:0.0050, Re:0.005, P≤0.015, S≤0.010, surplus is Fe; The component of described B material area and mass percent (Wt%) are: C:0.20, Si:0.45, Mn:1.10; Cr:0.95, W:0.02, Ni:1.05; Mo:0.550, Cu:0.10, SiC:0.20; Al2O3:0.25, V:0.10, N:0.01; Re:0.10; P≤0.015, S≤0.010, surplus is Fe; The component of described C material area and mass percent (Wt%) are: C:0.25, Si:0.60, Mn:1.30, Cr:1.20, W:0.03, Ni:1.30, Mo:0.70, Cu:0.20, SiC:0.25, Al2O3:0.30, V:0.15, N:0.025, RE:0.20, P≤0.015, S≤0.010, surplus is Fe.Described retarding disc is the disc structure with disk body mesopore, and A, B on described retarding disc, tri-material areas of C are adjacent three annulus successively; Annular radii Ra:r≤Ra < of described A material area r+1/3(R-r) ］; The annular radii Rb of described B material area: r+1/3(R-r) ］≤Rb < r+2/3(R-r) ］; ; The annular radii Rc of described C material area: r+2/3(R-r) ］≤Rc≤R.
Above-mentioned bullet train forges with the preparation of disc material employing remelting process, adopts basic lining, makes basic slag.For the disc material of excellent, need first material to be carried out to conditioning heat treatment, and then carry out modifier treatment.
Claims (3)
1. a bullet train forging disc material, it is characterized in that: the component of this disc material and mass percent (Wt%) are: C:0.16～0.25, Si:0.25～0.60, Mn:0.80～1.30, Cr:0.70～1.20, W:0.01～0.03, Ni:0.80～1.30, Mo:0.40～0.70, Cu:0.05～0.20, Si C:0.18～0.25, Al2O3:0.20～0.30, V:0.03～0.15, N:0.0050～0.025, Re:0.005～0.20, P≤0.015, S≤0.010, surplus is Fe.
2. bullet train forging disc material according to claim 1, is characterized in that: on same retarding disc, be divided into A, B, tri-material areas of C, the component of described A material area and mass percent (Wt%) are: C:0.16, Si:0.25, Mn:0.80, Cr:0.70, W:0.01, Ni:0.80, Mo:0.40, Cu:0.05, SiC:0.18, Al2O3:0.20, V:0.03, N:0.0050, Re:0.005, P≤0.015, S≤0.010, surplus is Fe; The component of described B material area and mass percent (Wt%) are: C:0.20, Si:0.45, Mn:1.10; Cr:0.95, W:0.02, Ni:1.05; Mo:0.550, Cu:0.10, SiC:0.20; Al2O3:0.25, V:0.10, N:0.01; Re:0.10; P≤0.015, S≤0.010, surplus is Fe; The component of described C material area and mass percent (Wt%) are: C:0.25, Si:0.60, Mn:1.30, Cr:1.20, W:0.03, Ni:1.30, Mo:0.70, Cu:0.20, SiC:0.25, Al2O3:0.30, V:0.15, N:0.025, RE:0.20, P≤0.015, S≤0.010, surplus is Fe.
3. bullet train forging disc material according to claim 2, is characterized in that: described retarding disc is the disc structure with disk body mesopore, and A, B on described retarding disc, tri-material areas of C are adjacent three annulus successively; Annular radii Ra:r≤Ra < of described A material area r+1/3(R-r) ］; The annular radii Rb of described B material area: r+1/3(R-r) ］≤Rb < r+2/3(R-r) ］; ; The annular radii Rc of described C material area: r+2/3(R-r) ］≤Rc≤R.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410155628.9A CN103952637B (en) | 2014-04-18 | 2014-04-18 | Bullet train forging disc material |
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| CN201410155628.9A CN103952637B (en) | 2014-04-18 | 2014-04-18 | Bullet train forging disc material |
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| CN103952637A true CN103952637A (en) | 2014-07-30 |
| CN103952637B CN103952637B (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463331A (en) * | 2015-12-04 | 2016-04-06 | 南京东电检测科技有限公司 | Hot rolling alloy steel for train brake disc |
| CN106086679A (en) * | 2016-08-12 | 2016-11-09 | 南京工程学院 | A kind of bullet train Forging Steel Brake Disc Steel material and the Forging Technology of forging thereof |
| CN111961979A (en) * | 2020-09-14 | 2020-11-20 | 新程汽车工业有限公司 | Light automobile threshold plate and machining method thereof |
| WO2023144455A1 (en) | 2022-01-31 | 2023-08-03 | Beringer Aero | Refined brake disk |
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| JPH04175524A (en) * | 1990-11-07 | 1992-06-23 | Kawasaki Heavy Ind Ltd | Brake disc member |
| JP2006169582A (en) * | 2004-12-15 | 2006-06-29 | Jfe Steel Kk | Stainless steel plate for disc brake with excellent thermal stress cracking resistance |
| CN1844204A (en) * | 2006-05-12 | 2006-10-11 | 上海培盟材料科技有限公司 | Friction materials for high-speed train braking and method for preparing same |
| CN101195898A (en) * | 2006-12-08 | 2008-06-11 | 中南大学 | Powder metallurgy aviation brake material for large-scale airplane and producing method thereof |
| CN101519754A (en) * | 2008-11-28 | 2009-09-02 | 北京纵横机电技术开发公司 | Alloy steel for braking discs |
| CN102400061A (en) * | 2011-10-20 | 2012-04-04 | 北京天宜上佳新材料有限公司 | Alloy steel material for brake disc of rapid train |
| CN103510024A (en) * | 2012-06-28 | 2014-01-15 | 南车戚墅堰机车车辆工艺研究所有限公司 | Alloy cast steel for high speed train brake disc, heat treatment method thereof and high speed train brake disc manufactured by the alloy cast steel |
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2014
- 2014-04-18 CN CN201410155628.9A patent/CN103952637B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04175524A (en) * | 1990-11-07 | 1992-06-23 | Kawasaki Heavy Ind Ltd | Brake disc member |
| JP2006169582A (en) * | 2004-12-15 | 2006-06-29 | Jfe Steel Kk | Stainless steel plate for disc brake with excellent thermal stress cracking resistance |
| CN1844204A (en) * | 2006-05-12 | 2006-10-11 | 上海培盟材料科技有限公司 | Friction materials for high-speed train braking and method for preparing same |
| CN101195898A (en) * | 2006-12-08 | 2008-06-11 | 中南大学 | Powder metallurgy aviation brake material for large-scale airplane and producing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463331A (en) * | 2015-12-04 | 2016-04-06 | 南京东电检测科技有限公司 | Hot rolling alloy steel for train brake disc |
| CN106086679A (en) * | 2016-08-12 | 2016-11-09 | 南京工程学院 | A kind of bullet train Forging Steel Brake Disc Steel material and the Forging Technology of forging thereof |
| CN106086679B (en) * | 2016-08-12 | 2020-04-10 | 南京工程学院 | Steel material for high-speed train forged steel brake disc and forging process of forging of steel material |
| CN111961979A (en) * | 2020-09-14 | 2020-11-20 | 新程汽车工业有限公司 | Light automobile threshold plate and machining method thereof |
| WO2023144455A1 (en) | 2022-01-31 | 2023-08-03 | Beringer Aero | Refined brake disk |
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