WO2013125633A1 - ディスクロータ - Google Patents
ディスクロータ Download PDFInfo
- Publication number
- WO2013125633A1 WO2013125633A1 PCT/JP2013/054329 JP2013054329W WO2013125633A1 WO 2013125633 A1 WO2013125633 A1 WO 2013125633A1 JP 2013054329 W JP2013054329 W JP 2013054329W WO 2013125633 A1 WO2013125633 A1 WO 2013125633A1
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- WO
- WIPO (PCT)
- Prior art keywords
- graphite
- disk rotor
- cast iron
- rotor
- treatment
- Prior art date
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- 229910002804 graphite Inorganic materials 0.000 claims abstract description 49
- 239000010439 graphite Substances 0.000 claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 23
- 238000005121 nitriding Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 13
- 230000003746 surface roughness Effects 0.000 claims description 11
- 150000004767 nitrides Chemical class 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 14
- 238000005266 casting Methods 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 7
- 239000002783 friction material Substances 0.000 description 7
- 238000003754 machining Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011324 bead Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/132—Structure layered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0008—Ferro
- F16D2200/0013—Cast iron
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0038—Surface treatment
- F16D2250/0046—Coating
Definitions
- the present invention relates to a disc rotor made of graphite-containing cast iron used for a disc brake of a vehicle or the like, for example.
- Patent Document 1 As a conventional graphite-containing cast iron member, for example, the one shown in Patent Document 1 is known.
- the corrosion resistance of the graphite-containing cast iron member is improved by removing the graphite from the surface by a chemical cleaning method by immersion in molten salt and then performing a salt bath nitriding treatment.
- an object of the present invention is to provide a disk rotor made of graphite-containing cast iron having high corrosion resistance.
- the present inventors have found out that rust is particularly likely to occur in the graphite portion exposed on the sliding surface of the disk rotor, and in order to prevent this, de-graphite treatment and gas soft nitriding treatment
- the present invention has been achieved by finding that it is effective to apply.
- the first characteristic configuration of the disk rotor according to the present invention is a disk rotor made of graphite-containing cast iron, and after removing graphite in the vicinity of the surface by degraphitization treatment, a nitride layer and oxynitride are formed on the surface by gas soft nitriding treatment.
- the physical layer is sequentially laminated.
- the graphite near the surface is removed by de-graphite treatment, and then the nitride layer and the oxynitride layer are sequentially laminated on the surface by gas soft nitriding treatment. It is fully covered with a physical layer and an oxynitride layer. Therefore, even when the disk rotor is exposed to water, it is difficult for water to reach the graphite on the surface of the disk rotor, rust formation can be prevented, and corrosion resistance is high.
- the second characteristic configuration of the disc rotor according to the present invention is that a surface roughness adjustment process is performed after the gas soft nitriding process.
- the surface roughness (coefficient of friction) of the disk rotor can be adjusted to an appropriate level by the surface roughness adjustment process, and the surface can be smoothed to some extent, so that the appearance of the disk rotor can be improved. Will also improve.
- a disc rotor according to the present invention is a disk-shaped member that constitutes one of the parts of a disc brake of a vehicle, and a brake pad provided with a friction material and a back plate when generating a braking force of the disc brake. Pressed against the side.
- the disk rotor according to the present invention is produced by casting a cast material of a disk rotor by casting using graphite-containing cast iron, and removing the graphite in the vicinity of the surface by de-graphite treatment after machining into a predetermined shape, and further gas softening.
- a nitride layer and an oxynitride layer are sequentially laminated on the surface by nitriding treatment.
- graphite-containing cast iron used as a material ordinary cast iron used in manufacturing a conventional disk rotor may be used.
- examples of such cast iron include flake graphite cast iron and spheroidal graphite cast iron.
- casting and machining may be performed according to a known method performed when a conventional disk rotor is manufactured.
- the de-graphite treatment can be performed according to a chemical cleaning method using molten salt immersion. However, at this time, it is desirable that the temperature condition is 400 ° C. to 500 ° C., and the treatment time is about 1 hour to 2 hours.
- the gas soft nitriding treatment can be performed according to a conventionally known gas soft nitriding method. However, at this time, it is desirable that the temperature condition is 550 ° C. to 650 ° C. and the treatment time is about 1 hour to 3 hours.
- the thickness of the nitride layer is preferably 5 ⁇ m to 25 ⁇ m, and the thickness of the oxynitride layer is preferably 1 ⁇ m to 10 ⁇ m.
- surface roughness adjustment processing may be performed as necessary after gas soft nitriding processing.
- This surface roughness adjustment process removes sludge and the like that are difficult to see with the naked eye from the surface of the disk rotor after the gas soft nitriding process, and smoothes the surface unevenness by averaging it to some extent. (Coefficient of friction).
- the surface roughness adjustment process can be performed according to a conventionally known bead shot method. However, it is desirable that the glass beads used at this time have an average particle diameter of 50 ⁇ m to 100 ⁇ m, an injection pressure of 1 kg pressure to 4 kg pressure, and an injection time of 3 minutes or less.
- the surface hardness of the disk rotor that has undergone the three steps of the de-graphite treatment, gas soft nitriding treatment, and surface roughness adjustment treatment is Hv 690 to 1150.
- Embodiments of the disk rotor of the present invention will be described.
- the disc rotor according to the present invention was manufactured according to the manufacturing flow shown in FIG.
- a flake graphite cast iron was used as the graphite-containing cast iron, and a casting material for a disc rotor was manufactured by casting. After machining into a predetermined disk shape by machining, pre-cleaning was performed.
- a chemical cleaning method by immersion in molten salt (temperature: 450 ⁇ 10 ° C., time: 60 ⁇ 10 minutes) is performed as de-graphite treatment to remove the graphite (graphite) near the surface, and gas soft nitriding treatment (Temperature: 580 ⁇ 10 ° C., time: 120 ⁇ 5 minutes, gas species: use nitrogen-based mixture of ammonia and carbon dioxide) Formed.
- Comparative Example 1 Similar to the above-described example, flake graphite cast iron is used as the graphite-containing cast iron, a casting material for the disk rotor is manufactured by casting, and is machined into a predetermined disc shape. Although it was processed and pre-cleaned, the subsequent de-graphite treatment, gas soft nitriding treatment, and surface roughness adjustment treatment were not performed.
- Comparative Example 2 only gas soft nitriding treatment: Like the above-described embodiment, flake graphite cast iron is used as graphite-containing cast iron, a casting material for a disk rotor is manufactured by casting, and a predetermined disk is obtained by machining.
- FIGS. 2 to 9 The cross-sectional organization charts relating to the examples of the present invention and Comparative Examples 1 to 3 are shown in FIGS. 2 to 9, and the properties thereof are shown in Table 1 below.
- 2 to 9 are the disk rotor substrate 1, graphite 2, oxynitride layer 3, and nitride layer 4.
- the graphite is hardly exposed on the surface of the disk rotor substrate by performing the de-graphite treatment and the gas soft nitriding treatment.
- FIGS. 6 to 9 in Comparative Examples 2 and 3 in which only the nitriding treatment was not performed and the graphite coating on the disk rotor base surface was incomplete, there was a concern about the corrosion resistance. Is held.
- the water absorbed by the wear powder penetrates into the inside through the graphite exposed on the surface of the disk rotor, so that the generation of rust is particularly promoted around the graphite. Accordingly, when the occurrence of rust on the surface of the disk rotor is promoted, the friction material of the brake pad is likely to stick to the disk rotor, so that the sticking torque in the actual vehicle increases and the sound level at the time of sticking also increases.
- each of the disk rotor according to the above embodiment and the disk rotor according to Comparative Example 1 is installed in a disk brake of an actual vehicle, and the disk rotor is less than a month under the following test environment where the disk rotor is likely to rust.
- the sticking torque and the sound level at the time of sticking were measured and compared.
- the disc rotor of the present invention can be used for disc brakes of vehicles and the like.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Braking Arrangements (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
ここでは、溶融塩浸漬による化学的洗浄法によって表面から黒鉛を除去した後、塩浴窒化処理を施すことによって、黒鉛含有鋳鉄製部材の耐食性を向上させている。
従って、本発明の目的は、耐食性の高い黒鉛含有鋳鉄製のディスクロータを提供することにある。
本構成によれば、脱黒鉛処理によって表面近傍の黒鉛を除去した後、ガス軟窒化処理によって表面に窒化物層と酸窒化物層とを順に積層してあるため、ディスクロータ表面の黒鉛が窒化物層及び酸窒化物層によって十分に被覆されている。従って、ディスクロータが水に晒された場合でも、水がディスクロータ表面の黒鉛に到達し難く、錆の発生を防止することができ、耐食性が高い。
本構成によれば、面粗度調整処理よって、ディスクロータの面粗度(摩擦係数)を適度なものに調節することができると共に、表面をある程度滑らかにすることができるため、ディスクロータの見栄えも向上する。
本発明に係るディスクロータは、車両のディスクブレーキの部品の一つを構成する円板状の部材であり、ディスクブレーキの制動力を発生させる際に、摩擦材と裏板とを備えるブレーキパッドが側面に押し付けられる。
本発明に係るディスクロータを、図1に示す製造フローに従って作製した。
黒鉛含有鋳鉄として片状黒鉛鋳鉄を用い、鋳造によりディスクロータの鋳造素材を製造し、機械加工によって所定の円板形状に加工した後、前洗浄を行った。
(1)比較例1(未処理):上述の実施例と同様に、黒鉛含有鋳鉄として片状黒鉛鋳鉄を用い、鋳造によりディスクロータの鋳造素材を製造し、機械加工によって所定の円板形状に加工して前洗浄を行ったが、後の脱黒鉛処理、ガス軟窒化処理、及び面粗度調整処理を実施しなかったものである。
(2)比較例2(ガス軟窒化処理のみ):上述の実施例と同様に黒鉛含有鋳鉄として片状黒鉛鋳鉄を用い、鋳造によりディスクロータの鋳造素材を製造し、機械加工によって所定の円板形状に加工して前洗浄を行った後、ガス軟窒化処理のみを実施したものである。
(3)比較例3(塩浴窒化処理):上述の実施例と同様に黒鉛含有鋳鉄として片状黒鉛鋳鉄を用い、鋳造によりディスクロータの鋳造素材を製造し、機械加工によって所定の円板形状に加工して前洗浄を行った後、米国特許出願公開第2008/0000550号明細書に記載される塩浴窒化処理を実施したものである。
ここで、ディスクブレーキにおけるディスクロータとブレーキパッドとが固着するメカニズムについて説明する。
図10に示すように、ディスクロータの表面に錆が発生したとき、ディスクブレーキの制動力を発生させる際に、ブレーキパッドの摩擦材がディスクロータの側面に押し付けられると、錆を含んだ摩耗粉が摩擦材表面の隙間に入り込む。この状態でディスクブレーキが水に晒されると、水が摩擦材表面の隙間に入り込んだ摩耗粉に吸収され、摩耗粉を起点として錆発生が促進されるため、ディスクロータとブレーキパッドとが固着する。
従って、ディスクロータの表面における錆発生が促進すると、ディスクロータに対してブレーキパッドの摩擦材が貼り付き易くなるため、実車における貼り付きトルクが上昇すると共に、貼り付き時の音レベルも高くなる。
1回目の評価は以下(1)~(5)を順に実施し、2回目以降の評価は以下(6)~(10)を繰り返して実施した。
(1)すり合わせ、
(2)水掛け、
(3)数回制動、
(4)屋外放置
(5)貼り付きトルク及び音レベル測定
(6)すり合わせ、
(7)水掛け、
(8)数回制動、
(9)屋外放置
(10)貼り付きトルク及び音レベル測定
また、図13に示すように、比較例1では試験開始直後から高い音レベルが測定されたが、本発明の実施例では音レベルの上昇はほぼ見られなかったことからも、比較例1では錆が生じ易く、本発明の実施例では錆が生じ難いことが示唆された。
Claims (2)
- 黒鉛含有鋳鉄製のディスクロータであって、
脱黒鉛処理によって表面近傍の黒鉛を除去した後、ガス軟窒化処理によって表面に窒化物層と酸窒化物層とを順に積層してあるディスクロータ。 - 前記ガス軟窒化処理後に面粗度調整処理を実施した請求項1に記載のディスクロータ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013001135.2T DE112013001135T5 (de) | 2012-02-23 | 2013-02-21 | Scheibenrotor |
US14/372,682 US20140360820A1 (en) | 2012-02-23 | 2013-02-21 | Disc rotor |
CN201380010020.0A CN104126080A (zh) | 2012-02-23 | 2013-02-21 | 盘形转子 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012-037695 | 2012-02-23 | ||
JP2012037695A JP2013174261A (ja) | 2012-02-23 | 2012-02-23 | ディスクロータ |
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WO2013125633A1 true WO2013125633A1 (ja) | 2013-08-29 |
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PCT/JP2013/054329 WO2013125633A1 (ja) | 2012-02-23 | 2013-02-21 | ディスクロータ |
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US (1) | US20140360820A1 (ja) |
JP (1) | JP2013174261A (ja) |
CN (1) | CN104126080A (ja) |
DE (1) | DE112013001135T5 (ja) |
WO (1) | WO2013125633A1 (ja) |
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JP2016164439A (ja) * | 2015-03-06 | 2016-09-08 | 株式会社アドヴィックス | ディスクロータの製造方法 |
KR102324761B1 (ko) * | 2017-05-23 | 2021-11-10 | 현대자동차주식회사 | 이종재질 브레이크 디스크 제조방법 및 이를 이용하여 제조된 이종재질 브레이크 디스크 |
PL4041929T3 (pl) * | 2019-10-09 | 2024-09-16 | Oerlikon Surface Solutions Ag, Pfäffikon | Sposób wytwarzania tarcz hamulcowych z żeliwa o zwiększonej odporności na korozję i zużycie |
Citations (4)
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JPH04193963A (ja) * | 1990-11-27 | 1992-07-14 | Hitachi Metals Ltd | 鋳鉄材料の複合表面処理方法 |
JP2000337410A (ja) * | 1998-06-30 | 2000-12-05 | Tokico Ltd | ディスクブレーキ用ロータ |
JP2010053926A (ja) * | 2008-08-27 | 2010-03-11 | Toyota Motor Corp | ディスクブレーキロータ及びその製造方法 |
JP2010534807A (ja) * | 2007-07-26 | 2010-11-11 | フェデラル−モーグル コーポレイション | 二重に被覆された鋳鉄製ブレーキロータおよび製造方法 |
Family Cites Families (10)
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US2938790A (en) * | 1955-11-08 | 1960-05-31 | Bendix Aviat Corp | Friction lining compositions |
US3712427A (en) * | 1970-11-05 | 1973-01-23 | Goodyear Tire & Rubber | Graphite and/or carbon disk with removable wear faces |
US3800392A (en) * | 1970-11-05 | 1974-04-02 | Goodyear Tire & Rubber | Graphite and/or carbon disk with removable wear faces |
JPS5530061B2 (ja) * | 1973-11-01 | 1980-08-08 | ||
FR2816636B1 (fr) * | 2000-11-16 | 2003-07-18 | Snecma Moteurs | Grenaillage des sommets des aubes refroidies |
DE112007000680B8 (de) * | 2006-04-14 | 2013-10-31 | Toyota Jidosha Kabushiki Kaisha | Edelmetallplattierung von Titankomponenten |
WO2007122490A2 (en) * | 2006-04-21 | 2007-11-01 | Element Six (Production) (Pty) Ltd | cBN COMPOSITE MATERIAL AND TOOL |
DE102009008114A1 (de) * | 2009-02-09 | 2010-08-12 | Daimler Ag | Verfahren zur Herstellung einer Bremsscheibe |
US20110079326A1 (en) * | 2009-10-07 | 2011-04-07 | Gm Global Technology Operations, Inc. | Method to increase corrosion resistance in ferritic nitrocarburized treated cast iron substrates |
US8893538B2 (en) * | 2010-12-08 | 2014-11-25 | Fuji Kihan Co., Ltd. | Instantaneous heat treatment method for metal product |
-
2012
- 2012-02-23 JP JP2012037695A patent/JP2013174261A/ja active Pending
-
2013
- 2013-02-21 CN CN201380010020.0A patent/CN104126080A/zh active Pending
- 2013-02-21 US US14/372,682 patent/US20140360820A1/en not_active Abandoned
- 2013-02-21 WO PCT/JP2013/054329 patent/WO2013125633A1/ja active Application Filing
- 2013-02-21 DE DE112013001135.2T patent/DE112013001135T5/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04193963A (ja) * | 1990-11-27 | 1992-07-14 | Hitachi Metals Ltd | 鋳鉄材料の複合表面処理方法 |
JP2000337410A (ja) * | 1998-06-30 | 2000-12-05 | Tokico Ltd | ディスクブレーキ用ロータ |
JP2010534807A (ja) * | 2007-07-26 | 2010-11-11 | フェデラル−モーグル コーポレイション | 二重に被覆された鋳鉄製ブレーキロータおよび製造方法 |
JP2010053926A (ja) * | 2008-08-27 | 2010-03-11 | Toyota Motor Corp | ディスクブレーキロータ及びその製造方法 |
Also Published As
Publication number | Publication date |
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CN104126080A (zh) | 2014-10-29 |
US20140360820A1 (en) | 2014-12-11 |
JP2013174261A (ja) | 2013-09-05 |
DE112013001135T5 (de) | 2014-11-06 |
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