KR20160025483A - The dissimilar material bonding method of the aluminum alloy pipe of the vehicle and the intake system Resonator - Google Patents

The dissimilar material bonding method of the aluminum alloy pipe of the vehicle and the intake system Resonator Download PDF

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Publication number
KR20160025483A
KR20160025483A KR1020150120567A KR20150120567A KR20160025483A KR 20160025483 A KR20160025483 A KR 20160025483A KR 1020150120567 A KR1020150120567 A KR 1020150120567A KR 20150120567 A KR20150120567 A KR 20150120567A KR 20160025483 A KR20160025483 A KR 20160025483A
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South Korea
Prior art keywords
resonator
aluminum
aluminum pipe
joining
pipe
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KR1020150120567A
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Korean (ko)
Inventor
이승현
유영상
김승재
김평수
Original Assignee
현대자동차주식회사
주식회사 한조
기아자동차주식회사
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Publication of KR20160025483A publication Critical patent/KR20160025483A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/012—Soldering with the use of hot gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B23K31/027—Making tubes with soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/22—Electroplating: Baths therefor from solutions of zinc
    • B23K2203/18—
    • B23K2203/20—

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Arc Welding In General (AREA)

Abstract

The present invention relates to a method for joining a dissimilar material to a stainless steel resonator and an aluminum pipe directly by using a brazing method and a method for joining dissimilar materials to an aluminum alloy pipe. The dissimilar material joining method of an alloy pipe includes: a washing process of washing a joining portion of the resonator and the aluminum pipe; A nickel plating step of plating nickel on an outer circumferential surface of the washed resonator junction; A zinc plating process for plating zinc on the nickel plated portion of the resonator; A flux applying step of applying a flux for aluminum on the junction of the resonator and the aluminum pipe; A degreasing step of performing degreasing to remove oil components and moisture on the joining parts of the resonator and the aluminum pipe; The joint between the resonator coated with aluminum flux and the aluminum pipe is subjected to a brazing process selected from inert gas metal arc welding (MIG welding) -brazing method, tungsten inert arc welding (TIG welding) -brazing method, and plasma-brazing method And a heterogeneous bonding process in which heterogeneous bonding is carried out using a filler.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dissimilar material bonding method of an aluminum alloy pipe and a suction system resonator of a vehicle,

The present invention relates to a method of joining dissimilar materials of a suction-type resonator and an aluminum alloy pipe of a vehicle, and more particularly, to a method of joining dissimilar materials of a stainless steel resonator and an aluminum pipe to each other using a brazing method, To a bonding method.

In the case of an internal combustion engine vehicle, it is a tendency to improve the output by simply supercharging the air to the existing natural intake engine to improve the output, and to pursue the weight reduction through the output.

The first turbocharger was developed for airplanes and other aircraft, and was used as a means to prevent the decrease in engine output due to the lean air as the air pressure dropped in the air passage outside the atmosphere.

The turbocharger uses the energy of the exhaust gas discharged from the internal combustion engine to forcibly compress the air sucked during the intake stroke to supply the compressed air to the cylinder. The turbocharger improves the output according to the increase in suction efficiency. The mechanical feedback ) System.

When divided into driving sources, there is a turbocharger that uses exhaust gas and a supercharger that uses an electric motor.

In recent years, a turbocharger intercooler (TCI) serving as an intercooler having an effect of ensuring an additional 10% improvement in fuel economy by lowering the temperature of air supplied forcibly is used.

The turbocharger generates high-frequency noise because the exhaust gas at a temperature higher than 800 ° C rotates 100,000 to 150,000 revolutions per minute. In recent years, customers' claim for high frequency broadband noise generated by turbochargers has increased, which has led to a decrease in desire to purchase turbo vehicles. Recently, car manufacturers are carrying out various activities to reduce noise of turbochargers.

As described above, the resonator is provided for noise reduction.

Fig. 1 is an overall perspective view of a configuration in which a resonator and a suction aluminum pipe in an automotive internal combustion engine are connected by a heat-resistant rubber hose. Fig. 2 is a perspective view showing a constitutional view And Fig.

As shown in Fig. 1, an aluminum pipe 30 is connected to an internal combustion engine via a resonator 10. [ Generally, the resonator 10 is made of stainless steel. A special rubber hose 20 for internal pressure and heat resistance is used for connecting the resonator 10 to the suction aluminum pipe 30 at a suction system of the vehicle. In other words, since the resonator 10 and the aluminum pipe 30 having different materials are difficult to bond with each other, the special rubber hose 20 for pressure resistance and heat resistance is connected by a mechanical coupling means such as a clamp 21 to be.

The rubber hose 20 has a high temperature of about 200 DEG C and a pressure of about 1.7 bar so that the rubber hose 20 is connected to the aluminum pipe 30 in the suction system of the vehicle. It is expensive, and due to the characteristics of the rubber, there is a problem in durability and service life.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a resonator and an aluminum pipe, which are made of stainless steel, in an inert gas metal arc welding (MIG welding) - Inhomogeneous resonator of vehicle and aluminum alloy pipe which can omit the use of rubber hose by carrying out direct connection of heterogeneous bonding method using brazing method and tungsten inert arc welding (TIG welding) - brazing method and plasma-brazing method The method comprising the steps of:

According to an embodiment of the present invention, there is provided a method of joining dissimilar materials of a suction-system resonator and an aluminum alloy pipe of a vehicle, comprising: a washing process of washing a joining portion of the resonator and the aluminum pipe; A nickel plating step of plating nickel on an outer circumferential surface of the washed resonator junction; A zinc plating process for plating zinc on the nickel plated portion of the resonator; A flux applying step of applying a flux for aluminum on the junction of the resonator and the aluminum pipe; A degreasing step of performing degreasing to remove oil components and moisture on the joining parts of the resonator and the aluminum pipe; The joint between the resonator coated with aluminum flux and the aluminum pipe is subjected to a brazing process selected from inert gas metal arc welding (MIG welding) -brazing method, tungsten inert arc welding (TIG welding) -brazing method, and plasma-brazing method And a heterogeneous bonding process in which heterogeneous bonding is carried out using a filler.

It is preferable that the cleaning process is performed by heating the cleaning agent to 70 to 90 占 폚 to perform ultrasonic pickling.

The thickness of the nickel plated layer formed in the nickel plating process is preferably 10 to 15 占 퐉.

The thickness of the zinc plated layer formed in the zinc plating process is preferably 5 to 15 탆.

The thickness of the intermetallic compound layer formed in the heterojunction process is preferably 10 탆 or less.

The filler used in the heterojunction process may be a flux core wire or a solid wire.

In the heterojunction process, the joining area of the resonator and the aluminum pipe is such that the inner diameter of the aluminum pipe is processed to allow the outer diameter of the resonator to be intruded, and then the resonator is bonded to the inner diameter of the aluminum pipe. .

According to the embodiment of the present invention, it is possible to directly connect the stainless steel resonator and the aluminum pipe without using the special rubber hose for high pressure resistance and heat resistance by using the dissimilar material joining method of the intake system resonator of the vehicle and the aluminum alloy pipe, There is an effect that the problem of high cost, durability and life span that are spent by using a special rubber hose for heat resistance can be solved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a configuration in which a resonate and a suction aluminum pipe in an automotive internal combustion engine are connected by a heat-
Fig. 2 is a cross-sectional perspective view and cross-sectional view of a conventional automobile internal combustion engine engine, in which a resonator and a suction aluminum pipe are connected by a heat-resistant rubber hose,
FIG. 3 is a perspective view and a cross-sectional view illustrating a connection of a denominator and a suction aluminum pipe of a responder of an automotive internal combustion engine according to an embodiment of the present invention,
FIG. 4 is a microstructure photograph of a joint portion connected by a dissolving method of a breathable aluminum pipe and a resonator of an automotive internal combustion engine according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

FIG. 3 is a perspective view and a cross-sectional view illustrating the connection of a denominator and a suction aluminum pipe of a motor vehicle internal combustion engine according to an embodiment of the present invention. FIG. 4 is a cross- This is a photograph of the microstructure of the joints connected by the dissimilar joining method of the resonator and the suction aluminum pipe.

As shown in the drawing, according to the present embodiment, the resonator 10 of stainless steel and the aluminum pipe 30 can be joined to each other by the welded portion 40 by the heterojunction. Accordingly, the resonator 10 and the aluminum pipe 30 are joined to each other without using a mechanical coupling means, such as a clamp or a rivet, as in the prior art.

To this end, a process of hetero-bonding the resonator 10 made of stainless steel to the aluminum pipe 30 will be described.

In order to join the resonator 10 and the aluminum pipe 30, first, the junction between the resonator 10 and the aluminum pipe 30 is cleaned.

At this time, the junction between the resonator 10 and the aluminum pipe 30 is cleaned by ultrasound pickling, neutralization, and finally rinsing. When the ultrasonic pickling is carried out, the cleaning agent is heated to 70 to 90 ° C in order to increase the cleaning power.

The surface cleaning of the resonator 10 and the aluminum pipe 30 is for completely removing the dust and when the medium to be welded, the condensate, the lubricating oil and the oil. If the target metal is not properly prepared, ) May not diffuse uniformly and the flow of the filler alloy may become incomplete. As a result, the flux may not be sufficiently stretched or discolored, and as a result, the surface to be brazed may become an incomplete bond.

Nickel (Ni) is plated on the joining portion, preferably the outer circumferential surface, of the stainless steel resonator 10 (nickel plating process) after the bonding site cleaning of the resonator 10 and the aluminum pipe 30 is completed.

The reason for performing the nickel plating is to form a zinc plated layer as an intermediate plated layer to be described later in order to avoid direct contact between the resonator 10 of the stainless steel and the aluminum pipe 30 at the time of welding of the aluminum pipe 30. In this embodiment, Nickel plating is further performed on the joining portion of the resonator 10 in order to improve the adhesion of the material to the resonator 10. Nickel is a better component of affinity with stainless steel than zinc. Plating nickel with zinc on the resonator 10 rather than zinc directly on the resonator 10 further increases the adhesion. Although the nickel plating layer has the effect of improving the adhesion between the resonator 10 and the zinc plated layer, the addition of the nickel plating layer causes excessive intermetallic compounds to be generated during the welding of the resonator 10 and the aluminum pipe 30 .

At this time, the nickel plating layer is preferably formed through electroplating, and the thickness of the nickel plating layer is preferably in the range of 10 to 15 mu m.

When nickel plating is completed on the junction of the resonator 10, zinc is plated on the nickel plating site of the resonator 10. (Zinc plating process)

Zinc reacts with iron or aluminum to form various intermetallic compounds, and the compound is stable. The electroplated zinc maintains the plating thickness in the range of 5 to 15 μm because it affects the quality of the bonding depending on the thickness of the plating. The hot dip galvanizing can be performed even when the thickness of the base material is 1.0 mm or less. In this embodiment, the thickness of the welded portion of the resonator 10 is about 0.7 mm.

When plating of nickel and zinc is completed on the junction of the resonator 10, a flux for aluminum is applied on the junction of the resonator 10 and the aluminum pipe 30 to destroy the oxide film. )

Successful aluminum bonding requires that the removal of the oxide layer be prioritized, whereby the metal surface is cleaned by the flux itself and the cleaned metal surface allows the filler alloy to ideally associate with the metal part, Removal should be first identified to provide flux at the joint.

Therefore, it is preferable that the flux is used uniformly on the surface of the joint by using the flux at a concentration of 5 g / m < 2 >. In the flux application method, the required length is set to 10.0 mm and the flux is applied by immersion in a flux cylinder. KF-AlF3 (product name) is used.

If too little flux is used, the metal filler will not flow smoothly, the joints will become poor, and the brazes will have high failure rate and discontinuity. In other words, the reaction process can become very sensitive.

In addition, if too much flux is used, there will be no effect on the brazing result, but there will be a flux that can fall on the bottom of the muffle, the surface of the brazed product will appear gray, Respectively.

When the application of the flux is completed, degreasing is performed to remove oil components and moisture on the joining portions of the resonator 10 and the aluminum pipe 30. (Degreasing Process)

The degreasing process removes oil component or moisture on the flux-coated joint at a temperature of 200 to 250 ° C for 30 minutes.

After the degreasing process, the joint between the resonator 10 and the aluminum pipe 30 to which the flux for aluminum is applied is subjected to inert gas metal arc welding (MIG welding) -brazing method, tungsten inert arc welding (TIG welding) -brazing method, - Hexane bonding is carried out by using the brazing material in one brazing method selected from the brazing method (heterogeneous bonding process).

The joining portion of the resonator 10 and the aluminum pipe 30 in the heterogeneous bonding process is such that the inside diameter of the aluminum pipe 30 is processed to allow the outside diameter of the resonator 10 to be intro- duced, 30) inner diameter (refer to FIG. 3).

The brazing method selected from inert gas metal arc welding (MIG welding) -brazing method, tungsten inert arc welding (TIG welding) -brazing method and plasma-brazing method, The gap GAP at the joining portion of the aluminum pipe 30 is filled up

Such a brazing method is performed under the condition that the aluminum pipe 30 is melted and flows on the resonator 10 made of stainless steel to fill the step, and the intermetallic compound layer is limited to 10 μm or less so as not to be thick (see FIG. If the intermetallic compound layer is overbrown by over-brazing, an Fe-Al-based compound is produced and the properties of the joint are extremely poor.

When the heterojunction is carried out in the heterojunction process, the amount of the current is controlled so as not to be added to the material of the resonator 10 to control the amount of heat input, and the filler material is selected and used to match the aluminum pipe 30, The filler can be used either as a flux core wire or as a solid wire.

In the present invention, since A3003 material was used, ER4043 (product name) was applied as a smectic material.

On the other hand, until now, there has been almost no research and experiment in the field of heterogeneous bonding between stainless steel (St) and aluminum (Al).

In particular, stainless steel (St) and aluminum (Al) have a large difference in melting point between the two metals, so that there is a great deal of difficulty in joining the two.

In addition, even when attempting to bond, an intermetallic compound layer is formed between aluminum and stainless steel, and cracks are likely to occur. Therefore, it is not easy to control the heat input because the difference in melting point between the two metals is large.

Particularly, aluminum has a melting point of about 600 to 650 ° C., whereas stainless steel has a melting point of 1,400 to 1,450 ° C., which is too large to melt, so that aluminum melts before the stainless steel melts.

Thus, to weld two metals, general welding is not possible and only brazing is possible. That is, the brazing method is employed in which welding is difficult and the metals having a high melting point are not completely melted but only metals having a low melting point are melted.

Heterogeneous welding methods include vacuum brazing, atmosphere brazing, inert gas metal arc welding (MIG welding) - brazing, tungsten inert arc welding (TIG welding) - brazing, laser - brazing, and plasma - brazing have.

However, since the vacuum brazing method is excellent in bonding ability, it is difficult to apply because of low productivity, high equipment cost, high production cost, and the brazing method in atmosphere is excellent in productivity, but oxidation occurs in the resonator It is hard to apply. Also, it costs a lot to build equipment.

In addition, the laser-brazing method is excellent in productivity and is advantageous in securing the quality, but it is expensive to construct the equipment and requires a large maintenance cost.

Accordingly, in the present invention, the inert gas arc welding (MIG welding) - brazing method, tungsten inert arc welding (TIG welding) - brazing method, Heterojunction bonding was performed using the plasma-brazing technique.

In the present invention, an inert gas metal arc welding (MIG welding) -brazing method, a tungsten inert arc welding (TIG welding) -brazing method, a plasma- The heterogeneous bonding was carried out using the brazing method.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

10: Resonator 20: Rubber hose
21: Clamp 30: Aluminum pipe
40:

Claims (7)

A method of joining a stainless steel resonator and a suction aluminum pipe in a suction system of a vehicle,
A washing step of washing the junction between the resonator and the aluminum pipe;
A nickel plating step of plating nickel on an outer circumferential surface of the washed resonator junction;
A zinc plating process for plating zinc on the nickel plated portion of the resonator;
A flux applying step of applying a flux for aluminum on the junction of the resonator and the aluminum pipe;
A degreasing step of performing degreasing to remove oil components and moisture on the joining parts of the resonator and the aluminum pipe;
The joint between the resonator coated with aluminum flux and the aluminum pipe is subjected to a brazing process selected from inert gas metal arc welding (MIG welding) -brazing method, tungsten inert arc welding (TIG welding) -brazing method, and plasma-brazing method A method for joining dissimilar materials of a suction system resonator and an aluminum alloy pipe of a vehicle, which comprises a hetero-bonding process for carrying out hetero-bonding using a filler material.
The method according to claim 1,
Wherein the cleaning process is performed by heating the cleaning agent to 70 to 90 DEG C to conduct ultrasound pickling, thereby bonding the dissimilar materials of the suction system resonator and the aluminum alloy pipe.
The method according to claim 1,
Wherein the thickness of the nickel plated layer formed in the nickel plating process is 10 to 15 占 퐉.
The method according to claim 1,
Wherein the thickness of the zinc plated layer formed in the zinc plating process is 5 to 15 占 퐉.
The method according to claim 1,
Wherein the thickness of the intermetallic compound layer formed in the heterojunction process is less than 10 占 퐉.
The method according to claim 1,
The method of joining dissimilar materials of a suction system resonator and an aluminum alloy pipe of a vehicle using a flux core wire or a solid wire is used as an additive agent used in the heterojunction process.
The method according to claim 1,
In the heterojunction process, the joining area of the resonator and the aluminum pipe is such that the inner diameter of the aluminum pipe is processed to allow the outer diameter of the resonator to be intruded, and then the resonator is bonded to the inner diameter of the aluminum pipe. A method of joining dissimilar materials of a suction system resonator and an aluminum alloy pipe of a vehicle.
KR1020150120567A 2014-08-26 2015-08-26 The dissimilar material bonding method of the aluminum alloy pipe of the vehicle and the intake system Resonator KR20160025483A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230043536A (en) 2021-09-24 2023-03-31 삼원동관 주식회사 Stainless pipe with copper coating and method of manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230043536A (en) 2021-09-24 2023-03-31 삼원동관 주식회사 Stainless pipe with copper coating and method of manufacturing the same

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