KR100887824B1 - Brake disc and method for manufacturing the same - Google Patents

Brake disc and method for manufacturing the same Download PDF

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Publication number
KR100887824B1
KR100887824B1 KR1020070102887A KR20070102887A KR100887824B1 KR 100887824 B1 KR100887824 B1 KR 100887824B1 KR 1020070102887 A KR1020070102887 A KR 1020070102887A KR 20070102887 A KR20070102887 A KR 20070102887A KR 100887824 B1 KR100887824 B1 KR 100887824B1
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South Korea
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weight
carbon nanotubes
carbon
iron
disc
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KR1020070102887A
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Korean (ko)
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황진하
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현대자동차주식회사
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Compositions of linings; Methods of manufacturing
    • F16D69/027Compositions based on metals or inorganic oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Compositions of linings; Methods of manufacturing
    • F16D69/023Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0004Materials; Production methods therefor metallic
    • F16D2200/0026Non-ferro
    • F16D2200/003Light metals, e.g. aluminium
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0034Materials; Production methods therefor non-metallic
    • F16D2200/0052Carbon
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00Manufacturing; Assembly
    • F16D2250/0038Surface treatment

Abstract

A brake disk for cars is provided that the durability is improved and heat crack is prevented as the carbon nano tube is formed in the surface of disc. The main component of the brake disk for cars is steel. Aluminium with 20~30 weight% is contained in the steel. Copper with 0.2~0.35 weight% is contained in the steel. Chrome with 0.15~0.30 weight% is contained in the iron. Carbon 3.6~3.8 weight% is contained in the iron. Manganese with 1.4~1.6 weight% is contained in the iron. Vanadium with 0.4~0.8 weight% is contained in the iron. Magnesium with 3.0~.6.0 weight% is contained in the iron. Nickel with 1.0~6.0 weight% is contained in the iron. Carbon nano tube with 10~20 weight% is included in the iron.

Description

자동차용 브레이크 디스크 및 그 제조 방법{Brake disc and method for manufacturing the same}Brake disc and method for manufacturing the same for automobiles

본 발명은 자동차용 브레이크 디스크 및 그 제조 방법에 관한 것으로서, 더욱 상세하게는 높은 마찰계수, 장기 내구성, 내마모성, 내식성 및 방열성, 내히트크랙(heat crack)성을 가지도록 탄소나노튜브를 함유하는 조성을 갖는 자동차용 브레이크 디스크 및 그 제조 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake disc for automobiles and a method of manufacturing the same, and more particularly, to a composition containing carbon nanotubes so as to have a high coefficient of friction, long-term durability, abrasion resistance, corrosion resistance and heat dissipation, and heat crack resistance. A brake disc for automobiles and a method of manufacturing the same.

잘 알려진 바와 같이, 자동차용 브레이크는 움직이는 자동차의 운동에너지를 열에너지로 전환하는 수단으로서, 브레이킹 동작시 브레이크 디스크 표면에서 화학적, 기계적인 마모 과정이 발생되며, 그리고 약간의 운동에너지는 엔진, 타이어, 공기 점성적 끌림에 의하여 흡수된다.As is well known, automotive brakes are a means of converting the kinetic energy of a moving vehicle into thermal energy, which causes chemical and mechanical wear processes on the brake disc surface during braking, and some kinetic energy is applied to the engine, tires and air. Absorbed by viscous attraction.

이러한 브레이크 디스크는 차량이 제동될 수 있는 일정한 수준의 마찰계수를 가져야 하고, 마찰 조건의 변화에도 그 값이 일정하게 유지되어야 하며, 또한 시간 경과에 따른 마찰계수의 변화는 없어야 하고, 디스크의 마모율이 크지 않아야 한 다.Such brake discs must have a constant friction coefficient at which the vehicle can be braked, the value must remain constant even with the change of friction conditions, and the friction coefficient should not change over time, and the wear rate of the disc will be Should not be large.

상기 디스크의 공격성으로 인한 D.V.T(Disc Thickness Variation)의 증가는 제동시 차체가 진동하는 현상인 져더(Judder)를 발생시키는 원인이 되므로 D.V.T의 증가는 작아야 하며, 제동시에 발생되는 마찰열과 주행시 노출되는 습기, 진흙 등의 외부환경 변화에 영향을 받지 않고 일정한 마찰성능을 유지할 수 있어야 한다.The increase in DVT (Disc Thickness Variation) due to the aggressiveness of the disk causes the judder, which is a phenomenon in which the vehicle body vibrates during braking, so the increase in DVT should be small, and the frictional heat generated during braking and moisture exposed during driving It should be able to maintain a constant friction performance without being influenced by changes in the external environment such as clay and mud.

자동차의 주행안정성에 대한 고객의 요구가 높아지지만, 주행성 또는 연비 개선을 위한 중량 감소를 실현하는 것이 보다 유효하며, 이러한 경량화 요구에 대하여 자동차 부품 대부분은 알루미늄화가 진행되어 오고 있지만, 브레이크디스크에 대해서는 알루미늄화가 실현되지 못하고 있는 바, 이는 알루미늄을 사용하면 디스크의 마모가 클 뿐만아니라 고온에 의해 늘어붙음 현상이 심해지고, 표면에 알루미늄 용착 현상이 나타나, 결국 마찰계수가 저하되는 동시에 마찰특성이 급격하게 떨어지는 등의 문제점이 있기 때문이고, 또한 브레이크 제동시 고온이 되어도 제동에 견딜 수 있는 충분한 기계적 강도를 필요로 하지만 이를 만족하는 재료가 없었기 때문이다.Although customers' demands for driving stability of automobiles are increasing, it is more effective to realize weight reduction for improving driving performance or fuel efficiency, and most of automotive parts have been made aluminum in response to such a light weight demand, but aluminum for brake discs It is not realized that aluminum not only increases the wear of the disk but also increases the sticking effect due to the high temperature, and causes the aluminum welding phenomenon to appear on the surface. This is because there is a problem such as, and the brake braking requires a sufficient mechanical strength to withstand the braking even at high temperatures, but there is no material that satisfies this.

일반적으로, 차량의 경량화 및 브레이크 성능 향상을 목적으로 기존 주철재로 된 브레이크 디스크를 알루미늄 복합소재로 대체할 경우, 경량화율은 50% 이상으로 그 효과가 크며, 특히 디스크의 경우 회전부품으로서 그 파급효과는 더욱 크다 할 것이다.In general, when replacing a conventional cast iron brake disc with an aluminum composite material for the purpose of lightening the vehicle and improving the brake performance, the weight reduction ratio is 50% or more, and the disc is particularly effective as a rotating part. The effect will be even greater.

또한, 디스크는 샤시부품중 언스프렁 웨이트(unsprung weight)로서 경량화가 되는 경우, 핸들링 성능, 주행감 개선 등의 효과를 얻을 수 있고, 마찰계수 안정, NVH 향상 등 전체적인 브레이크 성능을 향상시키는 효과를 얻을 수 있으므로, 브레이크 디스크의 내마모성, 내식성, 내히트크랙 등과 더불어 경량화시키는 방법이 연구되고 있다.In addition, when the disc is lightened as an unsprung weight among the chassis parts, the disk can achieve the effect of improved handling performance and driving comfort, and the effect of improving the overall brake performance such as stabilizing friction coefficient and improving NVH. As a result, a method of reducing the weight of the brake disc together with wear resistance, corrosion resistance, heat cracking, and the like has been studied.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로서, 높은 마찰계수, 장기 내구성, 내마모성, 내식성 및 방열성, 내히트크랙(heat crack)성이 우수한 브레이크 디스크를 제조하기 위하여 탄소나노튜브를 디스크 표면에 용사처리함으로써, 궁극적으로는 장기 주행후에도 안정된 제동력을 제공할 수 있는 자동차용 브레이크 디스크 및 그 제조 방법을 제공하는데 그 목적이 있다.The present invention has been made in view of the above point, in order to produce a brake disk having a high coefficient of friction, long-term durability, abrasion resistance, corrosion resistance and heat dissipation, heat crack resistance (heat crack), carbon nanotubes on the disk surface It is an object of the present invention to provide a brake disc for a vehicle and a method of manufacturing the same, which can ultimately provide a stable braking force even after a long run.

상기한 목적을 달성하기 위한 본 발명의 일구현예는: 철을 주성분으로 하고, 여기에 알루미늄 20~30중량%, 구리 0.2~0.35중량%. 크롬 0.15~0.30중량%, 탄소 3.6~3.8중량%, 망간 1.4~1.6중량%, 바나듐 0.4~0.8중량%, 마그네슘 3.0~6.0중량%, 니켈 1.0~6.0중량%, 탄소나노튜브 10~20중량%가 함유되고, 최종 디스크 재료의 표면에 탄소나노튜브가 총 중량대비 1~5중량%로 화염속도 1200m/s 이상의 고온 프레임 용사법에 의하여 용사 처리된 것을 특징으로 하는 자동차용 브레이크 디스크를 제공한다.One embodiment of the present invention for achieving the above object is: iron as a main component, 20 to 30% by weight of aluminum, 0.2 to 0.35% by weight of copper. Chromium 0.15 ~ 0.30%, Carbon 3.6 ~ 3.8%, Manganese 1.4 ~ 1.6%, Vanadium 0.4 ~ 0.8%, Magnesium 3.0 ~ 6.0%, Nickel 1.0 ~ 6.0%, Carbon Nanotube 10-20% It is contained, the surface of the final disk material provides a brake disc for automobiles, characterized in that the carbon nanotubes were sprayed by a high-temperature flame spraying method with a flame speed of 1200m / s or more at 1 to 5% by weight relative to the total weight.

상기한 목적을 달성하기 위한 본 발명의 다른 구현예는: 철을 주성분으로 하고, 여기에 알루미늄 20~30중량%, 구리 0.2~0.35중량%. 크롬 0.15~0.30중량%, 탄소 3.6~3.8중량%, 망간 1.4~1.6중량%, 바나듐 0.4~0.8중량%, 마그네슘 3.0~6.0중량%, 니켈 1.0~6.0중량%, 탄소나노튜브 10~20중량%가 함유된 혼합물을 140~150℃의 온도와 100~160kg/㎠압력으로 설계된 디스크의 형상으로 열성형시키는 단계와; 열성형된 디스크 최종 제품 표면에 용매에 분산되어 있는 탄소나노튜브 1~5중량%를 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅하여 140~150℃의 온도로 열처리하는 단계; 로 이루어지는 자동차용 브레이크 디스크 제조 방법을 제공한다.Another embodiment of the present invention for achieving the above object is: iron as a main component, 20 to 30% by weight of aluminum, 0.2 to 0.35% by weight of copper. Chromium 0.15 ~ 0.30%, Carbon 3.6 ~ 3.8%, Manganese 1.4 ~ 1.6%, Vanadium 0.4 ~ 0.8%, Magnesium 3.0 ~ 6.0%, Nickel 1.0 ~ 6.0%, Carbon Nanotube 10-20% Thermoforming the mixture containing the same into the shape of a disk designed at a temperature of 140 to 150 ° C. and a pressure of 100 to 160 kg / cm 2; Thermally spraying the carbon nanotubes 1 to 5 wt% dispersed in the solvent on the surface of the thermoformed disc by thermal spraying at a temperature of 140 to 150 ° C. by thermal spraying at a flame speed of 1200 m / s or more; Provided is a method for manufacturing a brake disc for an automobile.

상기와 같은 과제 해결 수단을 통하여, 본 발명은 다음과 같은 효과를 제공할 수 있다.Through the problem solving means as described above, the present invention can provide the following effects.

브레이크 조성물에 탄소나노튜브를 함유시키고, 이를 열성형한 후, 그 표면에 탄소나노튜브를 용사 코팅함으로써, 경량화와 더불어 눌어붙음 현상을 방지할 수 있고, 브레이킹 동작시 DTV 및 방열성면에서 우수한 효과를 제공할 수 있다.By incorporating carbon nanotubes into the brake composition, thermoforming them, and thermally coating the carbon nanotubes on the surfaces thereof, it is possible to reduce the weight and to prevent sticking, and to provide excellent effects in terms of DTV and heat dissipation during the braking operation. Can provide.

이하, 본 발명을 보다 구체적으로 살펴보기로 한다.Hereinafter, the present invention will be described in more detail.

본 발명은 브레이크 디스크 재료에 있어서, 철을 주성분으로 하고, 여기에 알루미늄 20~30중량%, 구리 0.2~0.35중량%. 크롬 0.15~0.30중량%, 탄소 3.6~3.8중량%, 망간 1.4~1.6중량%, 바나듐 0.4~0.8중량%, 마그네슘 3.0~6.0중량%, 니켈 1.0~6.0중량%을 첨가하고, 특히 탄소나노튜브를 10~20중량% 첨가하며, 또한 최종 제품의 표면에 탄소나노튜브를 1~5중량%로 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅하여 제조한 점에 주된 특징이 있다.In the brake disc material, the present invention has iron as a main component, and 20 to 30% by weight of aluminum and 0.2 to 0.35% by weight of copper. 0.15 to 0.30% chromium, 3.6 to 3.8% carbon, 1.4 to 1.6% manganese, 0.4 to 0.8% vanadium, 3.0 to 6.0% magnesium, 1.0 to 6.0% nickel, and especially carbon nanotubes. 10 to 20% by weight is added, and the main feature of the carbon nanotubes on the surface of the final product by spray coating by hot flame spraying at a flame speed of 1200 m / s or more.

여기서, 본 발명에 따른 브레이크 디스크의 성분 조성에 대한 수치 한정 이유를 설명하면 다음과 같다.Here, the reason for numerical limitation on the composition of the brake disc according to the present invention will be described.

1) 알루미늄 20~30중량%1) 20 ~ 30 wt% aluminum

알루미늄은 20중량% 미만에서는 브레이크 디스크 충분한 방열성이 얻어지지 않고, 30중량% 초과시에는 내마모성이 떨어지므로, 그 첨가범위를 20~30중량%로 한정하는 것이 바람직하다.When aluminum is less than 20% by weight, sufficient heat dissipation of the brake disc is not obtained, and when aluminum exceeds 30% by weight, wear resistance is inferior. Therefore, the addition range is preferably limited to 20 to 30% by weight.

2) 구리 0.2~0.35중량%2) Copper 0.2 ~ 0.35% by weight

구리의 함량은 0.2~0.35중량% 범위를 벗어나는 경우, 기재 중 페라이트(ferrite)가 존재하게 하여, 국부적인 마모가 생성되기 쉬우므로, 0.2~0.35중량%로 한정한다.If the content of copper is outside the range 0.2 to 0.35% by weight, the ferrite (ferrite) is present in the substrate, so that local wear is likely to be generated, it is limited to 0.2 to 0.35% by weight.

3) 크롬 0.15~0.30중량%3) chromium 0.15 ~ 0.30wt%

강력한 흑연 저해 원소로 0.30중량% 이상 첨가시 레데뷰라이트 형성과 함께 주철에서 복탄화물 형성으로 흑연 성장을 방해하고, 0.15중량%는 주철 주조시 용탕내에 고철 스크랩에 남아 있는 잔류 크롬 함량으로 그 함량이 적을수록 좋지만 그럴 경우 순철의 함량이 증가하므로, 0.15~0.30중량%로 한정한다.When added more than 0.30% by weight as a strong graphite inhibitor, it inhibits graphite growth due to the formation of red carbide in cast iron and complex carbides, and 0.15% by weight is the residual chromium content in the scrap scrap in molten iron during casting. Less is better, but in that case the content of pure iron increases, so limit to 0.15 ~ 0.30% by weight.

4) 탄소 3.6~3.8중량%4) Carbon 3.6 ~ 3.8% by weight

탄소 함량이 3.6중량%보다 낮을 경우 D-type이 발생하기 쉽고, 3.8중량%보다 높을 경우에는 Hyper-Eutectic 조건에서 Kishy형 흑연 발생이 쉽게 일어나므로, 3.6~3.8중량%로 한정한다.If the carbon content is lower than 3.6% by weight, D-type is likely to occur. If the carbon content is higher than 3.8% by weight, Kishy type graphite is easily generated under Hyper-Eutectic conditions, so it is limited to 3.6 to 3.8% by weight.

5) 망간 1.4~1.6중량%5) Manganese 1.4 ~ 1.6% by weight

망간의 기지조직의 펄라이트화 촉진 원소로서, 기지조직을 강화시켜 내마모성의 향상에 기여하며, 본 발명에서는 그 함량을 1.4~1.6중량%로 한정한다.As a pearlite-promoting element of the matrix structure of manganese, it strengthens the matrix structure and contributes to the improvement of abrasion resistance, and the content of the present invention is limited to 1.4 to 1.6% by weight.

6) 바나듐 0.4~0.8중량%6) Vanadium 0.4 ~ 0.8 wt%

바나듐은 내나모성 향상을 위해 첨가되지만, 그 함량이 0.4중량% 미만에서는 내마모성 발휘 작용을 효과적으로 발휘시키기 불충분하고, 0.8중량%를 초과하는 경우에는 그 효과가 더욱 증대되는 것은 아니므로 0.4~0.8중량%로 한정한다.Vanadium is added to improve the wear resistance, but if the content is less than 0.4% by weight, it is insufficient to effectively exhibit the wear resistance, and if it exceeds 0.8% by weight, the effect is not increased further. It is limited to.

7) 마그네슘 3.0~6.0중량%7) 3.0 ~ 6.0 wt% magnesium

마그네슘은 알루미늄에의 고용에 의해 기계적 강도에 관해서 상온 강도 및 고온 강도를 향상시키는 바, 마그네슘의 함량이 3.0중량% 미만인 경우 강도 향상의 효과가 충분하지 않고, 6.0중량% 초과시에는 주조성, 단조성 등의 성형성이 떨어지는 단점이 있으므로, 그 첨가량을 3.0~6.0중량%로 한정한다.Magnesium improves the room temperature strength and the high temperature strength with respect to the mechanical strength by solid solution to aluminum. When the magnesium content is less than 3.0% by weight, the effect of strength improvement is not sufficient. Since there exists a disadvantage in inferior moldability, etc., the addition amount is limited to 3.0 to 6.0 weight%.

8) 니켈 1.0~6.0중량%8) Nickel 1.0 ~ 6.0 wt%

니켈은 금속간 화합물로서 창출 또는 석출하고, 재료의 고온강도를 향상시키는 원소로서, 니켈의 함량이 1.0중량% 미만인 경우 고온강도의 향상 효과가 없고, 6.0중량%를 초과하는 경우에는 고온강도의 큰 상승없이 포화되므로, 그 첨가량을 1.0~6.0중량%로 한정한다.Nickel is an element that creates or precipitates as an intermetallic compound and improves the high temperature strength of the material. When nickel content is less than 1.0% by weight, nickel has no effect of improving the high temperature strength. Since it is saturated without a raise, the addition amount is limited to 1.0 to 6.0 weight%.

9) 탄소나노튜브 10~20중량%9) 10 ~ 20 wt% carbon nanotube

탄소나노튜브는 10중량% 미만에서는 강도 향상 효과가 미미하고, 20중량%를 초과하는 경우에는 그 효과가 증대되는 것은 아니므로, 10~20중량%로 한정한다.When the carbon nanotubes are less than 10% by weight, the strength improving effect is insignificant, and when the carbon nanotubes are more than 20% by weight, the effect is not increased. Therefore, the carbon nanotubes are limited to 10 to 20% by weight.

이러한 탄소나노튜브는 마찰 및 마모조절재로서 기타 첨가 성분들의 마모속도를 지연시키는 역할을 하게 되며, 또한 표면에 용처 처리됨에 따라 장기 사용시 소음 발생이 없는 효과를 발현하게 된다.These carbon nanotubes serve to delay the wear rate of other additives as friction and abrasion control materials, and as they are treated on the surface, they produce noise-free effects in long-term use.

또한, 상기 탄소나노튜브는 기저재의 알루미늄에 고착될 때, 디스크에 부가적인 기계적 강도와 마찰 특성을 제공하게 되며, 탄소나노튜브 입자는 상당히 작고 이에 비하여 그 외 성분은 상대적으로 큰 표면적을 가지기 때문에 탄소나노입자는 기저재의 표면에 부착될 수 있다.In addition, the carbon nanotubes provide additional mechanical strength and frictional properties to the disc when the carbon nanotubes are fixed to the aluminum of the base material, and the carbon nanotube particles are relatively small and the carbon nanotubes have relatively large surface areas. Nanoparticles can be attached to the surface of the base material.

즉, 상기 탄소나노튜브 입자는 기저재에 비하여 상당히 작기 때문에 탄소나노튜브 입자 크기의 마찰변형물질은 기저재 전체에 상당히 고르게 분산되며, 고른 분산을 위하여 상기 탄소나노튜브 10~20중량%는 다공성 기저재를 구성하는 각 성분 사이에 1~95마이크로미터 두께로 첨가되는 것이 바람직하다.That is, since the carbon nanotube particles are considerably smaller than the base material, the friction deformation material of the carbon nanotube particle size is fairly evenly dispersed throughout the base material, and the carbon nanotubes 10 to 20% by weight of the carbon nanotubes have a porous base It is preferable to add 1-95 micrometers in thickness between each component which comprises a ash.

이에, 상기 탄소나노튜브 입자는 마찰 변형입자로서 고성능 디스크로서 높은 투과성을 가지는 다공성 기저재를 형성할 수 있고, 다공성 기저재의 다공은 탄소나노튜브 입자 크기의 마찰 변형 재료가 다공성 기저재의 빈곳이나 틈새에 안착될 수 있도록 한다.Accordingly, the carbon nanotube particles may form a porous base material having high permeability as a high performance disk as friction deformation particles, and the pores of the porous base material may be formed in the voids or gaps of the carbon nanotube particle sized friction deformation material. Allow it to rest.

이때, 상기 탄소나노튜브는 다중벽 구조의 탄소나노튜브, 단일벽 구조의 탄 소나노튜브, 다중벽 구조 및 단일벽 구조의 탄소나노튜브가 혼합된 것중 선택된 어느 하나를 사용한다.In this case, the carbon nanotube is any one selected from a mixture of carbon nanotubes having a multi-wall structure, carbon nanotubes having a single wall structure, multi-wall structures, and carbon nanotubes having a single wall structure.

여기서, 본 발명의 디스크 조성물을 이용한 브레이크 디스크의 제조 방법을 살펴보면 다음과 같다.Here, look at the manufacturing method of the brake disk using the disk composition of the present invention.

전술한 바와 같이, 철을 주성분으로 하고, 여기에 알루미늄 20~30중량%, 구리 0.2~0.35중량%. 크롬 0.15~0.30중량%, 탄소 3.6~3.8중량%, 망간 1.4~1.6중량%, 바나듐 0.4~0.8중량%, 마그네슘 3.0~6.0중량%, 니켈 1.0~6.0중량%, 탄소나노튜브 10~20중량%가 함유된 혼합물을 140~150℃의 온도와 100~160kg/㎠압력으로 열성형시킨 다음, 성형된 디스크 최종 제품 표면에 용매에 분산되어 있는 탄소나노튜브 1~5중량%를 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅한 후, 140~150℃의 온도로 열처리함으로써, 본 발명의 브레이크 디스크가 제조된다.As mentioned above, iron is a main component, and 20-30 weight% of aluminum and 0.2-0.35 weight% of copper here. Chromium 0.15 ~ 0.30%, Carbon 3.6 ~ 3.8%, Manganese 1.4 ~ 1.6%, Vanadium 0.4 ~ 0.8%, Magnesium 3.0 ~ 6.0%, Nickel 1.0 ~ 6.0%, Carbon Nanotube 10-20% Was thermoformed to a temperature of 140 ~ 150 ℃ and 100 ~ 160kg / ㎠ pressure, and then 1 to 5% by weight of carbon nanotubes dispersed in a solvent on the surface of the molded disc final product flame speed 1200m / s After the thermal spray coating by the above-mentioned high temperature flame spraying method, it heat-processes at the temperature of 140-150 degreeC, and the brake disc of this invention is manufactured.

이하, 본 발명을 실시예에 의거하여 더욱 상세하게 설명하겠는바, 본 발명이 하기의 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples.

실시예1~2Examples 1-2

하기의 표 2에 나타낸 바와 같이, 실시예1로서, (A)알루미늄 30중량%, (B)구리 0.3중량% (C)크롬 0.3중량%, (D)탄소 3.6중량%, (E)망간 1.6중량%, (F)바나듐 0.8중량%, (G)마그네슘 5.4중량%, (H)니켈 6.0중량%, (I)철 37중량%, (J)탄소나노튜브 10중량%가 함유된 혼합물을 150℃의 온도와 150kg/㎠압력으로 열성형시킨 다음, 성형된 디스크 최종 제품 표면에 용매에 분산되어 있는 (K)탄소나노튜브 5중 량%를 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅한 후, 150℃의 온도로 열처리하여, 브레이크 디스크를 제조하였다.As shown in Table 2 below, as Example 1, (A) aluminum 30% by weight, (B) copper 0.3% by weight (C) chromium 0.3% by weight, (D) carbon 3.6% by weight, (E) manganese 1.6 A mixture containing 150% by weight, 0.8% by weight of (F) vanadium, 5.4% by weight of magnesium, 6.0% by weight of nickel (H), 37% by weight of iron (I), and 10% by weight of (J) carbon nanotubes After thermoforming at a temperature of 150 ° C. and a pressure of 150 kg / cm 2, 5% by weight of (K) carbon nanotubes dispersed in a solvent on the surface of the formed disc was sprayed by a high temperature flame spraying method with a flame speed of 1200 m / s or more. After that, heat treatment was performed at a temperature of 150 ° C. to produce a brake disc.

또한, 실시예2로서, (A)알루미늄 20중량%, (B)구리 0.3중량% (C)크롬 0.3중량%, (D)탄소 3.6중량%, (E)망간 1.6중량%, (F)바나듐 0.8중량%, (G)마그네슘 5.4중량%, (H)니켈 6.0중량%, (I)철 47중량%, (J)탄소나노튜브 10중량%가 함유된 혼합물을 150℃의 온도와 150kg/㎠압력으로 열성형시킨 다음, 성형된 디스크 최종 제품 표면에 용매에 분산되어 있는 (K)탄소나노튜브 5중량%를 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅한 후, 150℃의 온도로 열처리하여, 브레이크 디스크를 제조하였다.Further, as Example 2, (A) 20% by weight of aluminum, (B) 0.3% by weight of copper (C) 0.3% by weight of chromium, (D) carbon of 3.6% by weight, (E) 1.6% by weight of manganese, and (F) vanadium A mixture containing 0.8 wt%, (G) magnesium 5.4 wt%, (H) nickel 6.0 wt%, (I) iron 47 wt%, and (J) carbon nanotube 10 wt% was heated at 150 ° C. and 150 kg / cm 2. After thermoforming under pressure, 5 wt% of (K) carbon nanotubes dispersed in a solvent on the surface of the molded disc final product were thermally sprayed by hot flame spraying at a flame speed of 1200 m / s or more, and then heated to a temperature of 150 ° C. By heat treatment, a brake disc was produced.

비교예1~2Comparative Examples 1-2

비교예1로서, (A)알루미늄 30중량%, (B)구리 0.3중량% (C)크롬 0.3중량%, (D)탄소 3.6중량%, (E)망간 1.6중량%, (F)바나듐 0.8중량%, (G)마그네슘 5.4중량%, (H)니켈 6.0중량%, (I)철 52중량%가 함유된 혼합물을 150℃의 온도와 150kg/㎠압력으로 열성형시킨 다음, 150℃의 온도로 열처리하여, 브레이크 디스크를 제조하였다.As Comparative Example 1, (A) 30 wt% aluminum, (B) 0.3 wt% copper (C) 0.3 wt% chromium, (D) carbon 3.6 wt%, (E) manganese 1.6 wt%, (F) vanadium 0.8 wt% %, (G) magnesium 5.4% by weight, (H) nickel 6.0% by weight, (I) iron 52% by weight of the mixture was thermoformed at a temperature of 150 ℃ and 150kg / ㎠ pressure, and then to a temperature of 150 ℃ By heat treatment, a brake disc was produced.

비교예2로서, (A)알루미늄 27중량%, (B)구리 0.3중량% (C)크롬 0.3중량%, (D)탄소 3.6중량%, (E)망간 1.6중량%, (F)바나듐 0.8중량%, (G)마그네슘 5.4중량%, (H)니켈 6.0중량%, (I)철 50중량%가 함유된 혼합물을 150℃의 온도와 150kg/㎠압력으로 열성형시킨 다음, 용매에 분산되어 있는 (K)탄소나노튜브 5중량%를 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅한 후, 150℃의 온도로 열처 리하여, 브레이크 디스크를 제조하였다.As Comparative Example 2, (A) 27 wt% aluminum, (B) 0.3 wt% copper (C) 0.3 wt% chromium, (D) carbon 3.6 wt%, (E) manganese 1.6 wt%, (F) vanadium 0.8 wt% %, (G) magnesium 5.4 wt%, (H) nickel 6.0 wt%, (I) iron 50 wt% mixture was thermoformed at 150 ° C. and 150 kg / cm 2 pressure and then dispersed in a solvent. (K) 5% by weight of carbon nanotubes were spray-coated by a high-temperature flame spraying method with a flame speed of 1200 m / s or more, and then thermally treated at a temperature of 150 ° C. to prepare a brake disc.

Figure 112007073180527-pat00001
Figure 112007073180527-pat00001

시험예Test Example

실시예1~2 및 비교예1~2에 의한 브레이트 디스크를 아래와 같은 시험평가 사이클와 같이 순서대로 처리한 후, 이를 1사이클로 하되, 총6사이클에 거쳐 처리한 후, 실차에 장착하여 디스크 표면에 늘어붙음 여부를 관찰하고, DTV(Disc Thickness Variation)를 측정함과 함께 방열성을 평가하였다.After treating the brate discs according to Examples 1 and 2 and Comparative Examples 1 and 2 in the order as shown in the following test evaluation cycles, this was made into 1 cycle, and after 6 cycles in total, they were mounted on the actual vehicle and stretched on the surface of the disc. Adhesion was observed, and heat dissipation was evaluated while measuring DTV (Disc Thickness Variation).

이때, 방열성은 페이드 제동 10회후 디스크 온도가 100℃가 될때까지의 냉각시간을 나타낸다.In this case, the heat dissipation represents a cooling time until the disk temperature reaches 100 ° C after 10 times of fading braking.

* 시험평가 1사이클 * 1 cycle of test evaluation

① 항온항습조 : (75℃*90%)*48시간 유지① Constant temperature and humidity tank: (75 ℃ * 90%) * 48 hours

② 염수분무조 : (35℃*5%염수)*48시간 유지② Brine spray tank: (35 ℃ * 5% saline) * 48 hours

③ 건조 : (100℃*1시간)+(200℃*1시간) 유지③ Drying: Hold (100 ℃ * 1 hour) + (200 ℃ * 1 hour)

④ 자연방치 : 48시간④ Natural Left: 48 hours

이러한 시험에 따른 실시예 및 비교예들의 결과는 아래의 표 2에 나타낸 바와 같다.The results of Examples and Comparative Examples according to this test are shown in Table 2 below.

Figure 112007073180527-pat00002
Figure 112007073180527-pat00002

위의 표 2에 나타낸 바와 같이, 실시예1 및 실시예2는 비교예들에 비하여 눌어붙음 현상이 발생되지 않았고, DTV 변화도 미미하였으며, 방열성에서도 비교예들에 비하여 우수함을 알 수 있었다.As shown in Table 2, Example 1 and Example 2 did not occur in the pressing phenomenon compared to the comparative examples, the DTV change was also inferior, it was found that the heat dissipation is superior to the comparative examples.

Claims (4)

철을 주성분으로 하고, 여기에 알루미늄 20~30중량%, 구리 0.2~0.35중량%. 크롬 0.15~0.30중량%, 탄소 3.6~3.8중량%, 망간 1.4~1.6중량%, 바나듐 0.4~0.8중량%, 마그네슘 3.0~6.0중량%, 니켈 1.0~6.0중량%, 탄소나노튜브 10~20중량%가 함유되고, 최종 디스크 재료의 표면에 탄소나노튜브가 총 중량대비 1~5중량%로 화염속도 1200m/s 이상의 고온 프레임 용사법에 의하여 용사 처리된 것을 특징으로 하는 자동차용 브레이크 디스크.Iron is a main component, and 20-30 weight% of aluminum and 0.2-0.35 weight% of copper here. Chromium 0.15 ~ 0.30%, Carbon 3.6 ~ 3.8%, Manganese 1.4 ~ 1.6%, Vanadium 0.4 ~ 0.8%, Magnesium 3.0 ~ 6.0%, Nickel 1.0 ~ 6.0%, Carbon Nanotube 10-20% And a carbon nanotube on the surface of the final disc material, wherein the carbon nanotubes are thermally sprayed by a high temperature flame spraying method with a flame speed of 1200 m / s or more at a ratio of 1 to 5% by weight. 청구항 1에 있어서, 상기 탄소나노튜브 10~20중량%는 다공성 기저재를 구성하는 각 성분 사이에 1~95마이크로미터 두께로 첨가되는 것을 특징으로 하는 자동차용 브레이크 디스크.The brake disc for automobile according to claim 1, wherein 10 to 20% by weight of the carbon nanotubes are added in a thickness of 1 to 95 micrometers between the components constituting the porous base material. 철을 주성분으로 하고, 여기에 알루미늄 20~30중량%, 구리 0.2~0.35중량%. 크롬 0.15~0.30중량%, 탄소 3.6~3.8중량%, 망간 1.4~1.6중량%, 바나듐 0.4~0.8중량%, 마그네슘 3.0~6.0중량%, 니켈 1.0~6.0중량%, 탄소나노튜브 10~20중량%가 함유된 혼합물을 140~150℃의 온도와 100~160kg/㎠압력으로 설계된 디스크의 형상으로 열성형시키는 단계와;Iron is a main component, and 20-30 weight% of aluminum and 0.2-0.35 weight% of copper here. Chromium 0.15 ~ 0.30%, Carbon 3.6 ~ 3.8%, Manganese 1.4 ~ 1.6%, Vanadium 0.4 ~ 0.8%, Magnesium 3.0 ~ 6.0%, Nickel 1.0 ~ 6.0%, Carbon Nanotube 10-20% Thermoforming the mixture containing the same into the shape of a disk designed at a temperature of 140 to 150 ° C. and a pressure of 100 to 160 kg / cm 2; 열성형된 디스크 최종 제품 표면에 용매에 분산되어 있는 탄소나노튜브 1~5중량%를 화염속도 1200m/s 이상의 고온 프레임 용사법에 의해 용사 코팅하여 140~150℃의 온도로 열처리하는 단계;Thermally spraying the carbon nanotubes 1 to 5 wt% dispersed in the solvent on the surface of the thermoformed disc by thermal spraying at a temperature of 140 to 150 ° C. by thermal spraying at a flame speed of 1200 m / s or more; 로 이루어지는 자동차용 브레이크 디스크 제조 방법.Brake disk manufacturing method for an automobile consisting of. 청구항 3에 있어서, 상기 탄소나노튜브는 다중벽 구조의 탄소나노튜브, 단일벽 구조의 탄소나노튜브, 다중벽 구조 및 단일벽 구조의 탄소나노튜브가 혼합된 것중 선택된 어느 하나인 것을 특징으로 하는 자동차용 브레이크 디스크 제조 방법.The vehicle according to claim 3, wherein the carbon nanotubes are any one selected from a mixture of carbon nanotubes having a multi-wall structure, carbon nanotubes having a single wall structure, carbon nanotubes having a single wall structure, and multi-wall structures. Method for manufacturing brake discs for
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101113668B1 (en) 2009-03-02 2012-02-14 현대자동차주식회사 Brake drum for a vehicle and method for manufacturing the same
KR101519157B1 (en) 2009-03-02 2015-05-11 현대자동차주식회사 Vehicle brake disc and method for manufacturing the same
KR101558597B1 (en) 2009-09-29 2015-10-07 현대자동차주식회사 Surface treatment method of brake disk

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KR20060017950A (en) * 2004-08-23 2006-02-28 이광래 Manufacturing method of a brake disk for a vehicle
EP1637617A1 (en) 2004-09-10 2006-03-22 Nissin Kogyo Co., Ltd Composite metal material, a method of producing it and its use in brakes.
KR20070013730A (en) * 2005-07-27 2007-01-31 현대자동차주식회사 Brake disk and method for manufacturing the same
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KR20060017950A (en) * 2004-08-23 2006-02-28 이광래 Manufacturing method of a brake disk for a vehicle
EP1637617A1 (en) 2004-09-10 2006-03-22 Nissin Kogyo Co., Ltd Composite metal material, a method of producing it and its use in brakes.
KR20070085216A (en) * 2004-11-10 2007-08-27 가부시키가이샤 니콘 Carbon nanotube aggregate and process for producing the same
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101113668B1 (en) 2009-03-02 2012-02-14 현대자동차주식회사 Brake drum for a vehicle and method for manufacturing the same
KR101519157B1 (en) 2009-03-02 2015-05-11 현대자동차주식회사 Vehicle brake disc and method for manufacturing the same
KR101558597B1 (en) 2009-09-29 2015-10-07 현대자동차주식회사 Surface treatment method of brake disk

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