KR100435389B1 - Method of coating of synchronizer ring with large friction coefficient - Google Patents
Method of coating of synchronizer ring with large friction coefficient Download PDFInfo
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- KR100435389B1 KR100435389B1 KR10-2002-0024679A KR20020024679A KR100435389B1 KR 100435389 B1 KR100435389 B1 KR 100435389B1 KR 20020024679 A KR20020024679 A KR 20020024679A KR 100435389 B1 KR100435389 B1 KR 100435389B1
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/22—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc
- B05B7/222—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc
- B05B7/226—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc the material being originally a particulate material
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- Coating By Spraying Or Casting (AREA)
Abstract
본 발명은 마찰계수가 큰 싱크로나이저 링 코팅방법에 관한 것으로서, 더욱 상세하게는 자동차 변속기의 부품인 싱크로나이저 링 내측 표면에 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 용사코팅하여 내마모성이 우수하고 마찰계수가 큰 코팅층을 형성시키는 싱크로나이저 링 코팅방법에 관한 것이다.The present invention relates to a method of coating a synchronizer ring having a large friction coefficient, and more particularly, to abrasion resistance of molybdenum (Mo) -bronze-AlSi alloy powder on the inner surface of a synchronizer ring which is a part of an automobile transmission. This invention relates to a synchronizer ring coating method for forming a coating layer having a superior friction coefficient.
이러한 본 발명에 따른 싱크로나이저 링은 내마모성이 우수하고 마찰계수가 커서 현재 사용하는 싱크로나이저 링 소재인 황동을 대체하여 향후 변속기의 고성능화 추세에 대비할 수 있는 효과가 있으며, 내마모성이 우수한 싱크로나이저 링을 사용함으로써 제품의 내구성을 증진시킬 수 있어 경제성을 확보할 수 있는 효과가 있다.The synchronizer ring according to the present invention has excellent abrasion resistance and a large friction coefficient, thereby replacing brass, which is currently used as a synchronizer ring material, to prepare for the trend of high performance of a transmission in the future, and use a synchronizer ring having excellent wear resistance. By doing so, it is possible to increase the durability of the product, thereby ensuring economic feasibility.
Description
본 발명은 마찰계수가 큰 싱크로나이저 링 코팅방법에 관한 것으로서, 더욱 상세하게는 자동차 변속기의 부품인 싱크로나이저 링 내측 표면에 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 용사코팅하여 내마모성이 우수하고 마찰계수가 큰 코팅층을 형성시키는 싱크로나이저 링 코팅방법에 관한 것이다.The present invention relates to a method of coating a synchronizer ring having a large friction coefficient, and more particularly, to abrasion resistance of molybdenum (Mo) -bronze-AlSi alloy powder on the inner surface of a synchronizer ring which is a part of an automobile transmission. This invention relates to a synchronizer ring coating method for forming a coating layer having a superior friction coefficient.
일반적으로 싱크로나이저 링 제조공정은 개략적으로 주조-단조-가공-검사로 이루어지고 있다. 현재 사용되는 싱크로나이저 링은 황동을 원하는 모양으로 단조하여 제조하고 있는 바, 이는 마찰계수가 그리 크지 않고 내마모성이 약하다는 단점이 있다. 따라서, 향후의 변속기 고성능화 추세를 감안하여 볼 때 현재보다 내마모성이 우수하고 마찰계수가 큰 재질의 싱크로나이저 링이 요구된다. 싱크로나이저 링의 이러한 특성으로 인하여 현재 황동(brass)으로 제조되어진 기지의 싱크로나이저 링에 몰리브덴(Mo) 등을 용사코팅하여 사용하거나 황동(brass) 분말에 몰리브덴(Mo)이나 종이 등을 섞어 분말 소결방법 등을 이용하여 소결한 후 사용하는 등의 시도가 이루어지고 있다. 그러나, 몰리브덴(Mo) 등을 용사코팅하여 사용하는 방법은 마찰계수가 여전히 낮아 고성능화에 대한 대안이 되지 못하고 있고, 황동 분말에 몰리브덴(Mo)이나 종이 등을 섞어 분말 소결하는 방법은 마찰계수는 높지만 내마모성이 약하여 그 사용에 제한을 받는 문제점이 있어 왔다. 따라서, 이러한 싱크로나이저 링의 내마모성 및 마찰계수를 개선시킬 필요성이 절실히 대두되고 있는 실정이다.In general, the synchronizer ring manufacturing process is roughly composed of casting, forging, machining, and inspection. Currently used synchronizer rings are manufactured by forging brass to a desired shape, which has disadvantages in that the friction coefficient is not so large and the wear resistance is weak. Therefore, in view of the future transmission performance trend, a synchronizer ring made of a material having better abrasion resistance and a larger coefficient of friction is required. Due to this characteristic of the synchronizer ring, molybdenum (Mo) or the like is spray coated on a known synchronizer ring, which is currently made of brass, or molybdenum (Mo) or paper is mixed with brass powder to sinter the powder. Attempts have been made, such as after sintering using a method or the like. However, molybdenum (Mo), etc. by spray coating method is still a low coefficient of friction is not an alternative to high performance, and the method of sintering powder by mixing molybdenum (Mo) or paper with brass powder has a high coefficient of friction. There has been a problem in that the wear resistance is weak and its use is restricted. Therefore, there is an urgent need to improve the wear resistance and friction coefficient of the synchronizer ring.
이에, 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 종래의 싱크로나이저 링 내측 표면에 15 ∼ 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 플라즈마 용사코팅하여 우수한 내마모성과 큰 마찰계수를 갖는 코팅층을 형성시키고, 이로써 싱크로나이저 링의 내마모성과 마찰계수를 개선시킬 수 있는 싱크로나이저 링 코팅방법을 제공하는데 그 목적이 있다.Therefore, the present invention was invented to solve the above problems, plasma molybdenum (Mo) -bronze-AlSi alloy powder having a particle size of 15 ~ 45㎛ on the inner surface of the conventional synchronizer ring. It is an object of the present invention to provide a synchronizer ring coating method that can form a coating layer having excellent wear resistance and a large coefficient of friction by spray coating, thereby improving the wear resistance and coefficient of friction of the synchronizer ring.
이하, 본 발명을 설명하면 다음과 같다.Hereinafter, the present invention will be described.
본 발명에 따른 마찰계수가 큰 싱크로나이저 링 코팅방법은 싱크로나이저 링 내측 표면에 15 ∼ 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 플라즈마 용사코팅하는 단계를 포함하는 것을 특징으로 한다.Synchronizer ring coating method having a large coefficient of friction according to the present invention is the step of plasma spray coating molybdenum (Mo) -bronze-AlSi alloy powder having a particle size of 15 ~ 45㎛ on the inner surface of the synchronizer ring It is characterized by including.
특히, 상기 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말의 조성은 몰리브덴100 중량부에 대하여 청동 20 ∼ 30 중량부 및 AlSi 20 ∼ 30 중량부를 포함하는 것으로서, 이때의 상기 청동은 구리(Cu) 90 중량% 및 주석(Sn) 10 중량%로 구성된 것이고 상기 AlSi는 알루미늄(Al) 88 중량% 및 규소(Si) 12 중량%로 구성된 것임을 특징으로 한다.Particularly, the composition of the molybdenum (Mo) -bronze-AlSi alloy powder includes 20 to 30 parts by weight of bronze and 20 to 30 parts by weight of AlSi based on 100 parts by weight of molybdenum, wherein the bronze is copper ( Cu) 90% by weight and tin (Sn) 10% by weight and the AlSi is characterized in that consisting of 88% by weight of aluminum (Al) and 12% by weight of silicon (Si).
우선, 본 발명에 따른 싱크로나이저 링 코팅방법에서는 15 ∼ 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 코팅용 분말로서 사용한다. 여기서, 몰리브덴(Mo)은 싱크로나이저 링의 경도상승을 목적으로 첨가한 것이다. 이때, 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말은 그 조성이 몰리브덴(Mo) 100 중량부에 대하여 청동(bronze)은 20 ∼ 30 중량부를 포함하고 AlSi는 20 ∼ 30 중량부를 포함하는 싱크로나이저 링 코팅재로서, 바람직하게는 몰리브덴 100 중량부에 대하여 청동 25 중량부 및 AlSi 25 중량부가 포함된 합금분말을 사용하는 것이 좋다. 여기서, 상기 청동은 구리(Cu) 90 중량%와 주석(Sn) 10 중량%로 구성된 것이고, 상기 AlSi는 알루미늄(Al) 88 중량%와 규소(Si) 12중량%로 구성된 것이다.First, in the synchronizer ring coating method according to the present invention, molybdenum (Mo) -bronze-AlSi alloy powder having a particle size of 15 to 45 µm is used as the coating powder. Here, molybdenum (Mo) is added for the purpose of increasing the hardness of the synchronizer ring. At this time, the molybdenum (Mo) -bronze-AlSi-based alloy powder has a composition of 20 to 30 parts by weight of bronze and 20 to 30 parts by weight of AlSi with respect to 100 parts by weight of molybdenum (Mo). As the synchronizer ring coating material, it is preferable to use an alloy powder containing 25 parts by weight of bronze and 25 parts by weight of AlSi with respect to 100 parts by weight of molybdenum. Here, the bronze is composed of 90% by weight of copper (Cu) and 10% by weight of tin (Sn), and the AlSi is composed of 88% by weight of aluminum (Al) and 12% by weight of silicon (Si).
또한, 용사코팅이란 용융상태의 금속이나 세라믹스 등의 입자군을 피처리물 표면에 분무하여 부착시키는 방식으로 적층피막을 형성시키는 코팅법으로서, 플라즈마 용사코팅법에서는 코팅재의 분무 및 용융을 위하여 플라즈마 가스가 이용된다. 상기 플라즈마 용사코팅법에서는 플라즈마 가스인 아르곤 가스를 전기 아크를 통해 플라즈마 가스화하고, 이 플라즈마 가스의 열용량을 높여주기 위하여 수소 가스를 소량 첨가한다. 이렇게 하여 얻어진 플라즈마 가스는 그 온도가15000K 정도의 매우 고온으로 코팅하고자 하는 분말을 순간 용융시켜 모재의 표면에 부착시키게 된다. 본 발명에서는 용사시 플라즈마 가스인 아르곤 가스에 수소 가스를 약 5% 가량 첨가하여 플라즈마 가스의 온도를 높여줌으로써 고융점인 몰리브덴 분말을 용이하게 용융시키는 통상의 방법을 적용한다.In addition, thermal spray coating is a coating method for forming a laminated film by spraying and attaching a group of particles such as molten metal or ceramics to the surface of a workpiece. In the plasma spray coating method, a plasma gas is used to spray and melt a coating material. Is used. In the plasma spray coating method, argon gas, which is a plasma gas, is converted into a plasma gas through an electric arc, and a small amount of hydrogen gas is added to increase the heat capacity of the plasma gas. The plasma gas thus obtained is instantaneously melted and adhered to the surface of the base metal at a very high temperature of about 15000K. In the present invention, a conventional method of easily melting molybdenum powder having a high melting point by applying about 5% of hydrogen gas to the argon gas, which is a plasma gas during spraying, increases the temperature of the plasma gas.
이와 같이 하여, 싱크로나이저 링 내측 표면에 15 ∼ 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 플라즈마 용사코팅법을 이용하여 용사코팅하게 되면, 싱크로나이저 링 표면에는 이에 요구되는 내마모성과 마찰계수가 동시에 향상될 수 있는 코팅층이 형성되어진다.Thus, when the molybdenum (Mo) -bronze-AlSi alloy powder having a particle size of 15 to 45㎛ on the inner surface of the synchronizer ring is thermally coated using a plasma spray coating method, the synchronizer ring surface is There is formed a coating layer that can be improved at the same time the wear resistance and friction coefficient required.
이하, 다음의 실시예에 의거 본 발명을 더욱 상세히 설명하는 바, 본 발명이 다음의 실시예로 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples.
실시예:Example
싱크로나이저 링의 코팅하려고 하는 내측 표면 부위를 약 0.6 ∼ 1.2㎜ 크기의 알루미나 입자로 표면거칠기 Ra~8 정도가 되도록 브라스팅을 실시한 후 플라즈마 용사코팅기를 이용하여 몰리브덴(Mo) 100 중량부에 대하여 청동(bronze) 25 중량부, AlSi 25 중량부를 포함시킨 합금분말로 300㎛의 두께로 용사코팅 하였다. 이때, 상기 청동은 구리(Cu) 90 중량% 및 주석(Sn) 10 중량%로 구성된 것(90Cu-10Sn)이고, 상기 AlSi는 알루미늄(Al) 88 중량% 및 규소(Si) 12 중량%로 구성된 것(88Al-12Si)이다. 또한, 플라즈마 가스인 아르곤가스에 수소가스를 약 5% 가량 첨가한 후 플라즈마 가스의 온도를 높여 고융점인 몰리브덴 분말의 용융을 용이하게 할 수 있는 가스의 조성으로 용사코팅을 실시하였다. 그런 다음, 규정된 연삭가공을 하여 싱크로나이저 링을 제작하였다. 그리고, 코팅된 합금의 마모량과 마찰계수를 측정하였고, 그 결과를 다음의 표 1에 요약하여 나타내었다.The inner surface part of the synchronizer ring to be coated is blasted with alumina particles having a size of about 0.6 to 1.2 mm so as to have a surface roughness of Ra to about 8, and then bronze with respect to 100 parts by weight of molybdenum (Mo) using a plasma spray coating machine. (bronze) 25 parts by weight of alloy powder containing 25 parts by weight of AlSi was sprayed to a thickness of 300㎛. In this case, the bronze is composed of 90% by weight of copper (Cu) and 10% by weight of tin (Sn) (90Cu-10Sn), the AlSi is composed of 88% by weight of aluminum (Al) and 12% by weight of silicon (Si). (88Al-12Si). In addition, about 5% of hydrogen gas was added to the argon gas, which is a plasma gas, and the thermal spraying coating was performed with a gas composition that could easily increase the temperature of the plasma gas to facilitate melting of the molybdenum powder having a high melting point. The synchronizer ring was then fabricated by the prescribed grinding process. In addition, the wear amount and the friction coefficient of the coated alloy were measured, and the results are summarized in Table 1 below.
비교예 1 ∼ 4:Comparative Examples 1 to 4:
코팅용 합금분말의 조성을 다음의 표 1에 나타낸 바와 같이 각각 달리한 점을 제외하곤 상기 실시예와 동일한 플라즈마 용사코팅법으로 싱크로나이저 링의 내측 표면을 코팅처리하였다. 그리고, 각각의 코칭처리된 싱크로사이저 링을 이용하여 코팅된 합금의 마모량과 마찰계수를 측정하였고, 그 결과를 다음의 표 1에 요약하여 나타내었다. 하기 표 1에 나타낸 바와 같이, 비교예 3에서의 링 코팅재 합금분말은 몰리브덴(Mo) 100 중량부에 대하여 AlSi 50 중량부가 포함된 것으로서, 이때의 AlSi는 알루미늄(Al) 88 중량% 및 규소(Si) 12 중량%로 구성된 것(88Al-12Si)이다. 또한, 비교예 4에서의 링 코팅재 합금분말은 몰리브덴 100 중량부에 대하여 황동(brass) 30 중량부가 포함된 것으로서, 이때의 황동은 구리(Cu) 70 중량%와 아연(Zn) 30 중량%로 구성된 것(70Cu-30Zn)이다.The inner surface of the synchronizer ring was coated by the same plasma spray coating as in the above example, except that the composition of the coating alloy powder was changed as shown in Table 1 below. In addition, the wear amount and the friction coefficient of the coated alloy were measured using each coached synchronizer ring, and the results are summarized in Table 1 below. As shown in Table 1 below, the ring coating material alloy powder in Comparative Example 3 contained 50 parts by weight of AlSi with respect to 100 parts by weight of molybdenum (Mo), wherein AlSi was 88% by weight of aluminum (Al) and silicon (Si). ), Consisting of 12% by weight (88Al-12Si). In addition, the ring coating material alloy powder in Comparative Example 4 contains 30 parts by weight of brass (brass) with respect to 100 parts by weight of molybdenum, wherein the brass is composed of 70% by weight of copper (Cu) and 30% by weight of zinc (Zn) (70Cu-30Zn).
이상의 결과로부터, 비교예 1의 황동단조재와, 비교예 2의 몰리브덴 코팅층 및 비교예 4의 100몰리브덴(Mo)-30황동(Brass) 코팅층에서는 본 실시예의 100몰리브덴(Mo)-30청동(bronze)-25(88Al-12Si) 코팅층에 비해 내마모성 및 마찰계수가 낮았으며, 비교예 3의 100몰리브덴(Mo)-50(88A1-12Si)의 경우에는 마찰계수는 높으나 내마모성이 낮아 싱크로나이저 링의 코팅재료로 적합하지 않았다. 즉, 본 발명의 방법에서 사용된 100몰리브덴(Mo)-25청동(bronze)-25(88Al-12Si) 합금분말은 용사후 형성되는 코팅층의 내마모성 및 마찰계수가 비교예 1 ∼ 4에 비해 높아 싱크로나이저 링의 코팅재료로 적합함을 알 수 있다.From the above results, in the brass forging material of Comparative Example 1, the molybdenum coating layer of Comparative Example 2 and the 100 molybdenum (Mo) -30 brass (Brass) coating layer of Comparative Example 4, 100 molybdenum (Mo) -30 bronze (bronze) of the present embodiment Abrasion resistance and friction coefficient were lower than that of) -25 (88Al-12Si) coating layer. In the case of 100 molybdenum (Mo) -50 (88A1-12Si) of Comparative Example 3, the coefficient of friction was high but the abrasion resistance was low and the coating of the synchronizer ring Not suitable as a material That is, the 100 molybdenum (Mo) -25 bronze (88Al-12Si) alloy powder used in the method of the present invention has a high abrasion resistance and friction coefficient of the coating layer formed after thermal spraying compared to Comparative Examples 1 to 4 It can be seen that it is suitable as a coating material of the niger ring.
이상에서 살펴본 바와 같이, 본 발명에서는 싱크로나이저 링 내측 표면에 15 ∼ 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)-AlSi계 합금분말을 플라즈마 용사코팅함으로써, 다음과 같은 효과를 얻을 수 있다.As described above, in the present invention, by plasma-spray coating molybdenum (Mo) -bronze-AlSi alloy powder having a particle size of 15 ~ 45㎛ on the inner surface of the synchronizer ring, the following effects are obtained. Can be.
1) 싱크로나이저 링 내측 표면에 내마모성 및 마찰계수가 동시에 향상된 코팅층을 형성할 수 있게 된다.1) It is possible to form a coating layer with improved abrasion resistance and friction coefficient at the same time on the inner surface of the synchronizer ring.
2) 상기한 코팅층을 갖는 싱크로나이저 링은 내마모성이 우수하고 마찰계수가 커서 현재 사용하는 싱크로나이저 링 소재인 황동을 대체하여 향후 변속기의 고성능화 추세에 대비할 수 있는 효과가 있다.2) The synchronizer ring having the above coating layer has excellent abrasion resistance and a large coefficient of friction, thereby replacing brass, which is a material of the synchronizer ring currently used, to prepare for a trend of high performance of a transmission.
3) 내마모성이 우수한 싱크로나이저 링 사용에 따라 제품의 내구성을 증진시킬 수 있어 경제성을 확보할 수 있는 효과가 있다.3) The use of a synchronizer ring with excellent wear resistance can enhance the durability of the product, thereby securing economic efficiency.
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| KR101628477B1 (en) * | 2014-08-28 | 2016-06-22 | 현대자동차주식회사 | Shift fork having improved abrasion resistance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051722A (en) * | 1991-06-21 | 1993-01-08 | Nippon Piston Ring Co Ltd | Synchronizer ring |
| JPH06129447A (en) * | 1992-10-16 | 1994-05-10 | Chuetsu Gokin Chuko Kk | Synchronizer ring |
| JPH07110037A (en) * | 1992-11-30 | 1995-04-25 | Nippon Piston Ring Co Ltd | Synchronizer ring |
| JPH08134619A (en) * | 1994-11-04 | 1996-05-28 | Mitsubishi Motors Corp | Thermal spraying method and thermal spraying device for thermal spraying material |
| KR0171243B1 (en) * | 1995-07-20 | 1999-01-15 | 박성배 | Double synchronizer for car transmission |
| KR100379015B1 (en) * | 2001-05-11 | 2003-04-07 | 현대자동차주식회사 | The method of coating of synchronizer ring with large friction coefficient |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051722A (en) * | 1991-06-21 | 1993-01-08 | Nippon Piston Ring Co Ltd | Synchronizer ring |
| JPH06129447A (en) * | 1992-10-16 | 1994-05-10 | Chuetsu Gokin Chuko Kk | Synchronizer ring |
| JPH07110037A (en) * | 1992-11-30 | 1995-04-25 | Nippon Piston Ring Co Ltd | Synchronizer ring |
| JPH08134619A (en) * | 1994-11-04 | 1996-05-28 | Mitsubishi Motors Corp | Thermal spraying method and thermal spraying device for thermal spraying material |
| KR0171243B1 (en) * | 1995-07-20 | 1999-01-15 | 박성배 | Double synchronizer for car transmission |
| KR100379015B1 (en) * | 2001-05-11 | 2003-04-07 | 현대자동차주식회사 | The method of coating of synchronizer ring with large friction coefficient |
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