KR100379015B1 - The method of coating of synchronizer ring with large friction coefficient - Google Patents
The method of coating of synchronizer ring with large friction coefficient Download PDFInfo
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- KR100379015B1 KR100379015B1 KR10-2001-0025919A KR20010025919A KR100379015B1 KR 100379015 B1 KR100379015 B1 KR 100379015B1 KR 20010025919 A KR20010025919 A KR 20010025919A KR 100379015 B1 KR100379015 B1 KR 100379015B1
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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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- Plasma & Fusion (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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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 내측에 몰리브덴(Mo)-청동(bronze) 계 합금분말을 용사코팅하여 내마모성이 우수한 코팅층을 형성시키는 단계를 포함하는 마찰계수가 큰 싱크로나이저 링 코팅방법에 관한 것이다. 이러한 본 발명에 따른 싱크로나이저 링은 내마모성이 우수하며 마찰계수가 커 현 사용 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 확보할수 있는 효과가 있다.The present invention relates to a synchronizer ring coating method having a large friction coefficient, and more particularly, a coating layer having excellent abrasion resistance by spray coating molybdenum (Mo) -bronze alloy powder on the inside of the synchronizer ring which is a part of an automobile transmission. It relates to a synchronizer ring coating method having a large coefficient of friction comprising the step of forming a. The synchronizer ring according to the present invention has excellent abrasion resistance and a large friction coefficient, thereby replacing brass, which is a currently used synchronizer ring material, to prepare for the trend of high performance of a transmission in the future, and by using a synchronizer ring having excellent wear resistance The durability of the product can be improved, so it is effective to secure economic feasibility.
Description
본 발명은 마찰계수가 큰 싱크로나이저 링 코팅방법에 관한 것으로서, 더욱 상세하게는 자동차 변속기의 부품인 싱크로나이저 링 내측에 몰리브덴(Mo)-동(bronze) 계 합금분말을 용사코팅하여 내마모성이 우수한 코팅층을 형성시키는 단계를 포함하는 마찰계수가 큰 싱크로나이저 링 코팅방법에 관한 것이다.The present invention relates to a synchronizer ring coating method having a large friction coefficient, and more particularly, a coating layer having excellent abrasion resistance by spray coating molybdenum (Mo) -bronze alloy powder on the inside of a synchronizer ring which is a part of an automobile transmission. It relates to a synchronizer ring coating method having a large coefficient of friction comprising the step of forming a.
일반적으로 싱크로나이저 링 제조공정은 개략적으로 주조-단조-가공-검사로 이루어지고 있다. 현 사용 싱크로나이저 링은 황동을 원하는 모양으로 단조 후 사용하고 있으나 마찰계수가 크지 않고 내마모성이 약하며 향후 변속기의 고성능화의 추세로 현재 사용재질보다 내마모성이 우수하며 마찰계수가 큰 재질로 제조되어진 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, 이러한 방법들은 몰리브덴(Mo) 등을 용사코팅하여 사용하는 경우 여전히 마찰계수가 낮아 고성능화에 대한 대안이 되지 못하며 황동 분말에 몰리브덴(Mo)이나 종이 등을 섞어 분말 소결한 경우는 마찰계수는 높지만 내마모성이 약하여 그 사용에 제한을 받는 문제점이 있어 왔다. 따라서, 최근에는 이러한 싱크로나이저 링의 마찰계수 및 내마모성을 개선시킬 필요성이 절실히 대두되고 있던 실정이었다.In general, the synchronizer ring manufacturing process is roughly composed of casting, forging, machining, and inspection. Currently used synchronizer rings are made of forged brass in the desired shape, but the coefficient of friction is not large and the wear resistance is weak. In the future, the performance of transmissions is improved, and the wear resistance is higher than the current material. Is required. Due to these characteristics of the synchronizer ring, molybdenum (Mo) 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, these methods do not provide an alternative to high performance when the molybdenum (Mo) is spray coated and still have a low coefficient of friction. However, when the powder is sintered by mixing molybdenum (Mo) or paper with brass powder, the coefficient of friction is high. There has been a problem in that the wear resistance is weak and its use is restricted. Therefore, in recent years, the necessity of improving the friction coefficient and wear resistance of the synchronizer ring has been urgently needed.
이에, 본 발명의 별명자는 상기와 같은 문제점을 해결하기 위하여 예의 노력한 결과, 종래의 싱크로나이저 링 내측에 몰리브덴(Mo)-청동(Bronze)계 합금분말을 플라즈마 용사코팅법을 이용하여 용사코팅함으로써, 내마모성 및 마찰계수가 큰 우수한 코팅층이 형성된 싱크로나이저 링을 제조할 수 있음을 확인함으로써, 본 발명을 완성하였다.Therefore, the nickname of the present invention is a result of the diligent effort to solve the above problems, by spray coating the molybdenum (Mo) -bronze (alloy) -based alloy powder inside the conventional synchronizer ring by using a plasma spray coating method, The present invention has been completed by confirming that a synchronizer ring in which an excellent coating layer having a high wear resistance and friction coefficient is formed can be manufactured.
결국, 본 발명의 주된 목적은 15 내지 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(Bronze)계 합금분말을 플라즈마 용사코팅하는 단계를 포함하는 싱크로나이저 링 코팅방법을 제공하는 데 있다.After all, the main object of the present invention is to provide a synchronizer ring coating method comprising the step of plasma-spray coating molybdenum (Mo) -bronze-based alloy powder having a particle size of 15 to 45㎛.
이하, 본 발명의 싱크로나이저 링 코팅방법에 대하여 보다 구체적으로 살펴보면 다음과 같다.Hereinafter, the synchronizer ring coating method of the present invention will be described in more detail.
본 발명은 먼저 내마모성 및 마찰계수가 큰 싱크로나이저 링을 용사코팅하는 방법에 있어서 싱크로나이저 링 내측에 코팅합금분말로써 15 내지 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)계 합금분말을 플라즈마 용사코팅하는 단계를 포함하는 싱크로나이저 링 코팅방법을 그 특징으로 한다.The present invention is a molybdenum (Mo) -bronze-based alloy powder having a particle size of 15 to 45㎛ as a coating alloy powder inside the synchronizer ring in the method for thermally coating a synchronizer ring having high wear resistance and friction coefficient. Characterized in that the synchronizer ring coating method comprising the step of plasma spray coating.
우선, 본 발명은 15 내지 45㎛의 입자크기를 갖는 몰리브덴(Mo)-청동(bronze)계 합금분말을 코팅용 분말로서 사용한다. 여기서, 몰리브덴은 싱크로나이저 링의 경도상승을 목적으로 첨가한 것이다. 이때, 몰리브덴(Mo)-청동(Bronze)계 합금분말의 조성은 몰리브덴 100 중량부에 대하여 청동 20 내지 40 중량부를 포함하는 것으로, 가령 몰리브덴(Mo)-30청동(Bronze)의 합금분말을 사용하는 것이 바람직하다. 청동(Bronze)의 조성은 90Cu-10Sn이다.First, the present invention uses a molybdenum (Mo) -bronze alloy powder having a particle size of 15 to 45㎛ as a powder for coating. Here, molybdenum is added for the purpose of increasing the hardness of the synchronizer ring. At this time, the composition of the molybdenum (Mo) -bronze alloy powder includes 20 to 40 parts by weight of bronze relative to 100 parts by weight of molybdenum, for example, using an alloy powder of molybdenum (Mo) -30 bronze (Bronze) It is preferable. The composition of bronze is 90Cu-10Sn.
또한, 플라즈마 용사코팅방법은 플라즈마 가스인 아르곤 가스를 전기 아크를 통하여 플라즈마 가스화하고 이 플라즈마 가스의 열용량을 높이기 위하여 수소가스를 소량 첨가한다. 이렇게 하여 얻어진 플라즈마 가스는 그 온도가 15000K 정도의 매우 고온으로 코팅하고자 하는 분말을 순간 용융시켜 모재의 표면에 부착하여 코팅하는 방법이다. 그런데, 본 발명에서는 용사중 플라즈마 가스인 아르곤 가스에 수소가스를 약 5%가량 첨가함으로써 플라즈마 가스의 온도를 높이고 이렇게 함으로써 고융점인 몰리브덴(Mo) 분말의 용융을 용이하게 할 수 있는 통상의 방법을 적용한다.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 a method of instantaneous melting of a powder to be coated at a very high temperature of about 15000K and attaching it to the surface of the base material to coat it. However, in the present invention, by adding about 5% of hydrogen gas to the argon gas, which is the plasma gas in the thermal spraying, it is possible to increase the temperature of the plasma gas and thereby facilitate melting of molybdenum (Mo) powder having a high melting point. Apply.
이하, 본 발명을 실시예에 의하여 더욱 상세히 설명하고자 한다. 그러나, 이들 실시예는 오로지 본 발명을 보다 구체적으로 설명하기 위한 것으로, 이들 실시예에 의하여 본 발명의 범위가 한정되지 않는다는 것은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.Hereinafter, the present invention will be described in more detail with reference to Examples. However, these examples are only for illustrating the present invention in more detail, it will be apparent to those of ordinary skill in the art that the scope of the present invention is not limited by these examples. .
실시예:Example
싱크로나이저 링의 코팅하려고 하는 부위를 크기 약 0.6 내지 1.2㎜크기의 알루미나 입자로 표면거칠기 Ra~8 정도가 되도록 브라스팅을 한 후 플라즈마 용사코팅기를 이용하여 몰리브덴(Mo)-30청동(Bronze)의 합금분말로 300㎛의 두께로 용사코팅 하였다. 이때, 플라즈마 가스인 아르곤가스에 수소가스를 약 5% 가량 첨가함으로써 플라즈마 가스의 온도를 높이고, 이렇게 함으로써 고융점인 몰리브덴(Mo) 분말의 용융을 용이하게 할 수 있는 가스조성으로 용사코팅 하였다. 그런 다음, 규정된 연삭가공을 하여 싱크로나이저 링을 제작하였다. 그리고, 코팅된 합금의 마모량과 마찰계수를 측정하였고, 그 결과를 다음 표 1에 요약하여 나타내었다.The area to be coated on the synchronizer ring is blasted with alumina particles having a size of about 0.6 to 1.2 mm so that the surface roughness Ra is about 8, and then molybdenum (Mo) -30 bronze (Bronze) The alloy powder was spray coated to a thickness of 300 μm. At this time, by adding about 5% of the hydrogen gas to the argon gas, which is the plasma gas, the temperature of the plasma gas was increased, and thus, the thermal spray coating was performed in a gas composition that can easily melt the molybdenum (Mo) 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 내지 4:Comparative Examples 1 to 4:
코팅용 합금분말의 조성을 다음 표 1에 나타낸 바와 같이 각각 달리한 점을 제외하곤 상기 실시예와 동일한 방법으로 싱크로나이저 링의 내측을 코팅처리하였다. 그리고, 각각의 코칭처리된 싱크로사이저 링을 이용하여 코팅된 합금의 마모량과 마찰계수를 측정하였고, 그 결과를 다음 표 1에 요약하여 나타내었다.Coating the inside of the synchronizer ring in the same manner as in the above embodiment except that the composition of the coating alloy powder was different 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.
이상의 결과로부터, 비교예 1, 비교예 2 및 비교예 4의 황동단조재, 몰리브덴(Mo) 및 몰리브덴(Mo)-30황동(brass) 코팅층은 실시예의 몰리브덴(Mo)-30청동(bronze) 코팅에 비하여 내마모성 및 마찰계수가 낮았으며 여기서 황동(brass)의 조성은 70Cu-30Zn이다. 또한 비교예 3의 몰리브덴(Mo)-50(A1-12Si)의 경우 마찰계수는 높으나 내마모성이 낮아 싱크로나이저 링의 코팅재료로 적합하지 않았다. 따라서, 몰리브덴(Mo)-30청동(Bronze) 코팅의 내마모성 및 마찰계수가 나머지 어느 것보다 높아 싱크로나이저 링의 코팅재료로 적합함을 알 수 있다.From the above results, the brass forgings, Molybdenum (Mo) and Molybdenum (Mo) -30 brass (brass) coating layers of Comparative Example 1, Comparative Example 2 and Comparative Example 4 were coated with the molybdenum (Mo) -30 bronze of Example The wear resistance and the friction coefficient were lower than those of the brass, where the composition of the brass is 70Cu-30Zn. In addition, in the case of molybdenum (Mo) -50 (A1-12Si) of Comparative Example 3, the friction coefficient was high, but the wear resistance was low, and thus it was not suitable as a coating material for the synchronizer ring. Accordingly, it can be seen that the wear resistance and the friction coefficient of the molybdenum (Mo) -30 bronze coating are higher than those of the others, and thus are suitable as a coating material for the synchronizer ring.
이상에서 상세히 설명한 바와 같이 본 발명은 마찰계수가 큰 싱크로나이저 링 코팅방법에 관한 것이다. 따라서, 이러한 본 발명에 따른 싱크로나이저 링은 내마모성이 우수하며 마찰계수가 커 현 사용 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 확보할수 있는 효과가 있다.As described in detail above, the present invention relates to a synchronizer ring coating method having a large friction coefficient. Therefore, the synchronizer ring according to the present invention is excellent in wear resistance and has a large friction coefficient, thereby replacing brass, which is a currently used synchronizer ring material, to prepare for the trend of high performance of a transmission in the future, and synchronizer ring having excellent wear resistance. By using it, it is possible to increase the durability of the product, thereby securing economic feasibility.
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