JP3314272B2 - Equipment for manufacturing metal-ceramic composite members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a metal-ceramic composite member, and more particularly to a solid composite of an oxide, a nitride, a carbide ceramic and a metal which is suitable for an automobile part, an electronic part and the like. The present invention relates to a manufacturing apparatus for manufacturing a member.

[0002]

2. Description of the Related Art Metal-ceramic composite members utilizing the properties of ceramics such as chemical stability, high melting point, insulation properties, and high hardness, and the properties of metals such as high strength, high toughness, easy workability, and conductivity are known. Widely used in automobiles, electronic devices, and the like. Typical examples include a rotor for an automobile turbocharger, a substrate and a package for mounting high-power electronic devices.

Hitherto, as a main method for producing a metal-ceramic composite member, there have been known methods such as bonding, plating, metallizing, thermal spraying, brazing, DBC, shrink fitting, and casting.

[0004] The bonding method is a method of bonding a metal member and a ceramic member with an organic or inorganic adhesive. The plating method is a method in which the surface of a ceramic member is activated and then put into a plating solution to perform metal plating. The metallization method is a method in which a paste containing metal powder is applied to the surface of a ceramic member and then sintered to form a metal layer. The thermal spraying method is a method in which droplets of metal (ceramics) are sprayed onto the surface of a ceramic (metal) member to form a metal (ceramic) layer on the surface of the ceramic (metal) member. The brazing method is a method of joining a metal member and a ceramic member with a low melting point metal or alloy (brazing material) interposed therebetween. In order to firmly join the brazing material to the ceramic member, the brazing material reacts with the ceramic. A metal layer is formed on the joining surface of the ceramic member in advance by adding a metal component which is easy to be used, or by the above-described metallization, thermal spraying or the like. D
The BC method is a technique developed for joining an oxide ceramic member and a copper member. At the time of joining, heating is performed in an inert atmosphere using oxygen-containing copper or the surface of an oxygen-free copper plate is oxidized in advance. This is a method of forming an oxide layer and then bonding. When joining a non-oxide ceramic member and a copper member by this method, an oxide layer must be formed on the surface of the non-oxide member in advance. In the case of the shrink fitting method, a convex portion and a concave portion are provided on the ceramic and metal members to be joined, respectively, and the outer diameter of the convex portion and the inner diameter of the concave portion are set to the same size. Then, the convex portion of the ceramic member is inserted therein and then cooled, whereby the concave portion of the metal is integrated with the ceramic convex portion. The cast-in method is a method similar to the shrink-fitting method, in which a metal is cast around a ceramic component, and the ceramic component is embraced by cooling shrinkage of the metal to be integrated.

[0005]

However, in such a conventional technique, there is a problem that the bonding method has low bonding strength and poor heat resistance. Plating, metallization,
In the case of the thermal spraying method, the formed metal (ceramic) is limited to a thin layer having a thickness of several μm to several tens μm. Shrink fit and insert molding are limited to certain cases where at least a portion of the ceramic member is embraced by metal. In the DBC method, the metal that can be bonded is limited to copper, and the bonding temperature is limited to a narrow range near the eutectic point of Cu—O. There is a point. In the case of the brazing method, since an expensive brazing material is used and the joining must be performed in a vacuum, the cost is very high and the application range is limited. In addition, a eutectic alloy to which a joining metal and another metal or even a non-metal are added is generally used as a brazing material, and is itself harder than a joining metal. Have a short heat cycle life.

As described above, when a metal member and a ceramic member are joined by a conventional technique, there are any of the following problems.

1) The metal and ceramic members to be joined are limited to those having a specific shape.

2) The cost of the joining step is high, and the range of application is limited.

3) The characteristics (bonding strength, heat resistance, heat cycle resistance) of the joined body have not been achieved to the extent that the required characteristics can be satisfied.

One of the inventors of the present invention proposed a novel method of manufacturing a metal-ceramic composite member in Japanese Patent Application No. 4-355211 "Method for Manufacturing Ceramic Electronic Circuit Board" in order to solve the above-mentioned problems.

[0011] In this manufacturing method, first, after dissolving the metal,
The oxide on the surface of the molten metal is removed by inserting a ceramic member into the molten metal or casting the molten metal into a mold provided with the ceramic member, and the ceramic member and the molten metal are interposed between the molten metal and the oxide. After firmly joining the metal members, a metal body having a predetermined shape could be formed at a predetermined position of the ceramic member.

Although an aluminum-ceramic composite member having excellent properties was obtained as an example by this manufacturing method, the present invention has been further improved based on the above-mentioned invention, and various kinds of metals having excellent properties have been obtained. An object of the present invention is to develop an apparatus for manufacturing a metal-ceramic composite member capable of manufacturing a ceramic composite member at low cost.

[0013]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and found that by inserting a guide-integrated die into a crucible and passing a ceramics member through a molten metal, the above-described method was adopted. To obtain the composite member of the present invention.

[0014] That is, the metal of the present invention - apparatus for manufacturing ceramic composite member has a preheating section for preheating the conveying means for continuously supplying a tube-like ceramic member, the conveyed ceramic member, preheated ceramic A joining part for joining the metal to at least a part of the peripheral surface of the ceramic member by passing the member through the molten metal in the crucible, and a cooling unit for gradually cooling the joined ceramic member to form a metal-ceramic composite member Move the above ceramic member
Built-in guide integrated die and possible guide integrated
A circular shape that allows the die to pass through the ceramic member
From the center hole of the cross section, and from the preheating section through the joint section
The guide part extending in the longitudinal direction to the cooling part and the above in the crucible
An opening formed in the guide section to communicate with the center hole.
The ceramic guided along the center hole
When the box member passes through the crucible through the opening
It is characterized by being in contact with the molten metal. The metal of the present invention
-The manufacturing equipment for ceramic composite members is tubular ceramic.
Conveying means for continuously supplying the
Preheating section for preheating ceramic members
Pass the Lamix material through the molten metal in the crucible
Attach metal to at least a part of the surrounding surface of the mix member
And the joined ceramic member is gradually cooled.
A cooling section to form a metal-ceramic composite member
Inside with integrated guide die that can move Lamix member
The die integrated with the guide is
Center hole with a circular cross-section through which the material passes, and this center hole
A plurality of narrow grooves extending radially outwardly therefrom through
And the cooling from the preheating section via the joining section
Guide part extending in the longitudinal direction to the part, and the center hole in the crucible
And an opening formed in the guide section to communicate with the
The ceramics guided along the center hole
When the member passes through the crucible, the molten metal
Contact with

The preheating section includes a guide capable of moving the ceramic member, and a preheater capable of preheating the ceramic member.

In addition, the joining portion has a guide-integrated die arranged in a crucible surrounded by a heater and a temperature control means at a downstream end of the die.

[0017]

Further, the guide-integrated die is provided with a tapered portion gradually expanding toward the outlet.

[0019]

In the apparatus of the present invention, in order to continuously manufacture a metal-ceramic composite member, it is necessary to continuously supply a molten metal and maintain the temperature of the molten metal at a constant temperature. In this case, as a method for supplying the molten metal, a method in which the molten metal melted in another melting furnace is supplied to a crucible in the apparatus of the present invention, and if necessary, heated or held at a predetermined joining temperature, Is stably supplied to the crucible in the apparatus of the present invention, melted in the crucible, and heated and held at a constant temperature. In any case, a crucible for holding molten metal and a heater Is necessary.

When a ceramic member in a room temperature state is directly inserted into a molten metal, the ceramic member may be broken by thermal shock, and it is necessary to preheat the ceramic member to prevent this. In this case, it is possible to preheat the ceramic member separately in a heating device and supply the preheated member using the conveying means of the device of the present invention,
Because of the inconvenience of safety when transporting the heated member and the problem of thermal shock during transportation, in the case of the apparatus of the present invention, the residual heat of the heater for heating the molten metal using the guide integrated die is used. A heater is provided on the guide-integrated die and the ceramic member is preheated.

One of the features of the apparatus of the present invention is how to remove the influence of a contaminant layer such as an oxide on the surface of a molten metal and bring a ceramic member into contact with a clean molten metal. In the present invention, a method is employed in which the ceramic member is inserted into the molten metal, and the ceramic member is moved in the molten metal in order to remove dirt attached to the surface of the ceramic member when entering the molten metal.

Various means for moving the molten metal are considered. In the present invention, a guide is provided as shown in an embodiment described later, and the ceramic member is moved through the guide while being inserted into the molten metal. And

As a method of forming a metal body at a predetermined position on the front and back surfaces of the ceramic member, in the present invention, a ceramic member wetted with a molten metal is passed through a die, and the molten metal is solidified at a predetermined position to form a metal having a predetermined shape. In addition to the method of forming a body, in some cases, a die is not provided, and instead, when drawing out from a molten metal, an inert gas is blown and the thickness of the metal layer which solidifies on the surface of the ceramic member at a gas flow rate. It may be a method of adjusting the length.

When a metal body is formed through a die, a taper that gradually expands in the die to adjust the thickness of the metal body to be formed, or by controlling the solidification position by adjusting the temperature of the die. A method of controlling the thickness of the metal body may be employed. In addition, by attaching the taper to the die itself, the frictional force between the die and the manufactured composite member can be reduced, and the life of the die can be extended.

In order to prevent high-temperature oxidation of the metal used in the present invention and each material of the guide-integrated die, it is necessary to set the inside of the apparatus to a specific atmosphere as necessary. In Examples described later, the measurement was performed in a nitrogen gas atmosphere.
A similar effect can be obtained by using an inert gas such as argon or hydrogen gas, or a reducing gas, or a mixture of these gases.

The metal used in the present invention is aluminum, copper, iron, nickel, silver or gold, or an alloy containing these metals as a main component, while the ceramic member is aluminum, silicon or the like. Oxides, nitrides, carbides and the like.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION

(Example 1)

FIG. 1 shows a schematic view of the apparatus of the present invention. The apparatus according to the present invention includes a conveying unit 1 for continuously supplying ceramic members 20 one by one using a pinch roller 6 from the left side.
And a preheating section 2 for preheating the ceramic member 20 in the die by heating the guide-integrated die 9 with preheating heaters 8 and 8 ′, and a molten metal heater 1 for melting the metal in the crucible 12.
Metal and molten 13 1,11', contacting the molten metal 13 in front and back surfaces of the ceramic member 20 by a medium that molten metal 13 tubes <br/> shaped ceramic member 20 passes, resulting Heat the ceramic member 20 to the molten metal heater 1
Bonding heaters 14, 14 'arranged side by side with 1, 11'
And water cooling jackets 17 and 17 ′ for controlling the temperature and joining means 3 for solidifying the contacted metal melt 13 and cooling means for gradually cooling the ceramic member to which the metal is joined to prevent cracking of ceramic member 20. And a shearing section 5 having a cutter 19 for shearing a metal-ceramic composite member obtained at a later step at a joint of ceramic members. is there. The guide integrated die
9 are the individual ceramics as shown in FIGS.
Center hole with a circular cross-section to allow
Corresponding to this center hole and extend radially outward
And a plurality of narrow grooves so that
From the part 2 to the cooling part 4 through the joint part 3 in the longitudinal direction
And a center portion of the crucible 12 inside the crucible 12.
So that it communicates with the center of the center hole except for the side part
It consists of upper and lower openings formed in the guide part, and
The ceramic member 20 guided along the
When passing through the inside of the pot 12, it contacts the molten metal 13 through the opening.
Ceramic members that come into contact with and are joined to metal
The entire shape is desired by passing through the guide portion 15
The size is determined.

That is, an outer diameter of 5
A plurality of alumina pipe members having a thickness of 0 mm, a thickness of 5 mm, and a length of 500 mm were prepared, and were continuously conveyed to the preheating unit 2 using the conveying means 1. In this case, since the preheating section 2 transmits heat to the entire guide section 15 by the preheating heaters 8 and 8 ', water cooling jackets 7 and 7' are provided at the entrance of the guide section to maintain the temperature at 100 ° C or less. I have.

Next, the preheated ceramic member is
Aluminum was adhered to the surface of the ceramic member 20 by passing through the molten aluminum in the joint 3. In this case, the inner diameter of the guide portion 15 of the integrated die is a shape through which the ceramic member 20 can pass, and the cross-sectional shape of the joint portion 16 of the integrated die on the outlet side is as shown in FIG. The structure is wider than the thickness of

In this case, aluminum as a metal is set in the crucible 12, the ceramic member 20 is inserted from the entrance of the guide portion 15 of the integrated die, and the tip reaches the joint portion 16 of the integrated die. Then, the crucible 12 is heated in a nitrogen gas (N ₂ ) atmosphere to dissolve the aluminum. Aluminum melt 1
3 enters the joint 16 of the integrated die on the exit side,
The temperature of the tip portion drops below the melting point while flowing through the portion, and the portion solidifies and blocks the outlet, preventing the molten metal from flowing out.

The guide portion 1 of the integrated die on the entrance side
The clearance was set to 0.2 mm or less in order to prevent the molten metal from entering into the gap between the mold 5 and the crucible 12 or the ceramic member 20. 75 molten aluminum
After being heated to 0 ° C., when the ceramic member is continuously supplied from the inlet side, the ceramic member enters the molten metal 13 in order, gets wet with the molten metal 13 and then enters the joint 16 of the integrated die on the outlet side. Finally, as shown in FIG. 3, the surface of the ceramic member was continuously extruded from the joint 16 outlet of the integrated die in a state where the aluminum fins were joined.

In this case, in order to manufacture a composite member having different thicknesses of bonded aluminum, a 1/100 tapered portion 16 'gradually expanding inside the joint portion 16 of the integrated die as shown in FIG. Bonding heater 14,
The solidification position was adjusted by 14 'and the water cooling jackets 17, 17'.

[0035]

As described above, the use of the apparatus according to the present invention makes it possible to continuously join molten metal to various ceramic members, with or without fins.
This is an excellent continuous production apparatus that can produce a predetermined tubular metal-ceramic composite member at low cost and in large quantities.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an apparatus for manufacturing a metal-ceramic composite member of the present invention.

FIG. 2 is a partial cross-sectional view of a joint portion of an exit-side integrated die of the apparatus for manufacturing a metal-ceramic composite member of the present invention.

FIG. 3 is a partial sectional view of an integrated die joining portion of the apparatus for manufacturing a metal-ceramic composite member of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveying means 2 Preheating part 3 Joining part 4 Cooling part 5 Shearing part 6 Pinch roller 7 Water cooling jacket 7 'Water cooling jacket 8 Preheating heater 8' Preheating heater 9 Guide integrated die 11 Molten heater 11 'Molten heater 12 Crucible 13 Melt 14 Joining Heater 14 'Joining heater 15 Integrated die guide 16 Integrated die 16' Tapered 17 Water cooling jacket 17 'Water cooling jacket 18 Slow cooling means 18' Slow cooling means 19 Cutter 20 Ceramics member

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masaru Soma 1-8-2 Marunouchi, Chiyoda-ku, Tokyo Dowa Mining Co., Ltd. (56) References JP-A-3-234348 (JP, A) JP-A-5 -220545 (JP, A) JP-A-60-118366 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C04B 41/80-41/91 C04B 37/00-37/02 B22D 19/00-19/16

Claims (5)

(57) [Claims] 1. A tube-like conveying means for the ceramic member continuously fed, a preheating section for preheating the conveyed ceramic member, a preheated ceramic member is passed through the molten metal in the crucible ceramic A joining portion for joining a metal to at least a part of a peripheral surface of the member, a cooling portion for gradually cooling the joined ceramic member to form a metal-ceramic composite member, and a movable ceramic member.
Built-in guide integrated die and integrated guide
The die cuts a circular section that allows the ceramic member to pass through.
Through the center hole of the surface and the joint from the preheating section
Guide section extending in the longitudinal direction to the cooling section, and inside the crucible
The opening formed in the above-mentioned guide part to communicate with the mandible
The ceramic being guided along the center hole
When the stainless steel passes through the crucible, it melts through the opening.
Metal characterized that you contact with hot water - apparatus for manufacturing ceramic composite member. 2. A continuous supply of a tubular ceramic member.
Transporting means and the transported ceramics member
Heating preheating part and preheated ceramic member in crucible
Of the surrounding surface of the ceramic member
A joining part for joining a metal to at least a part thereof;
The cooled ceramic member is gradually cooled and the metal-ceramic composite
The cooling part, which is a composite member, and the ceramic member can be moved
Built-in guide integrated die and integrated guide
The die cuts a circular section that allows the ceramic member to pass through.
The center hole of the surface and communicate with this center hole
A plurality of narrow grooves extending outward, wherein the
Gas extending in the longitudinal direction from the joint to the cooling section through the joint.
Guide so that it communicates with the center hole in the crucible.
Openings along the center hole, and
The ceramic member passed through the crucible
Metal characterized that you contact with the molten metal through the Rutoki the opening - manufacturing apparatus of the ceramic composite member. 3. A metal according to claim 1 or 2, wherein the formed by providing a preheatable preheater the ceramic member to the preheating unit - manufacturing apparatus of the ceramics composite member. 4. The method of claim 1, characterized in that is provided with a temperature control means at the downstream end of the guide integrated die or
4. The apparatus for manufacturing a metal-ceramic composite member according to claim 3 . 5. The apparatus for manufacturing a metal-ceramic composite member according to claim 1, wherein said guide-integrated die is provided with a tapered portion gradually expanding on an exit side.