KR20150113746A - Methods to produce a wire of a various multi-component alloy compositions for obtaining nanopowders by applying the electric explosion methods and its making apparatus - Google Patents

Abstract

The present invention relates to a method for manufacturing lead-free solder using an electric explosion method for obtaining nanopowder composed of multi-component alloy and to a manufacturing device using the same and, more specifically, to a method for manufacturing lead-free solder using an electric explosion method for obtaining nanopowder composed of multi-component alloy and to a manufacturing device using the same, wherein the performance of lead-free solder composed of various components can be improved. The method for manufacturing lead-free solder using an electric explosion method for obtaining nanopowder composed of multi-component alloy according to the present invention comprises the steps of: melting alloy composition in a crucible; introducing a wire through an entrance port into the crucible if a preset amount of the alloy composition has been melted; coating the surface of the wire, which has been introduced into the crucible, with the melted alloy composition; withdrawing the coated wire out of the crucible through an exit port and drying the wire while passing the wire through a drying furnace; introducing the dried wire into a main chamber using a feeding roll; making the wire, which has been introduced into the main chamber, into nanoparticles and dispersing the nanoparticles by electrically exploding the wire using pulse power injected into the main chamber; and manufacturing multi-component lead-free solder using the nanoparticles.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing a lead-free solder using an electric explosion method for obtaining nanopowders of various multicomponent alloy compositions and a manufacturing apparatus using the same. its making apparatus}

The present invention relates to a method for manufacturing a lead-free solder using an electric explosion method for obtaining nanopowders of various multicomponent alloy compositions, and a manufacturing apparatus using the same. More particularly, the present invention relates to a lead- Lead-free solder using an electric explosion method to obtain nano powder having various multi-component alloy compositions and a manufacturing apparatus using the same.

In general, conventional alloy wires have been produced by drawing, which is a metal processing technique that is as old as forging, and at first, a relatively thin metal wire is drawn through a hole in a wrought iron block, Horses, etc. have been utilized.

Here, the wire drawing apparatus is a single-head drawing apparatus called a drawing bench, which is operated at a relatively slow speed and a plurality of dies are provided, so that drawing processing of 5 to 6 passes can be made as one drawing apparatus It is a continuous drawing machine.

In addition, wire drawing is commonly used in metal by cold working at room temperature, and its manufacturing process is simple and widely used. However, it is difficult to produce various multicomponent alloy compositions and control of alloy composition is difficult. Therefore, a technique for producing a wire having various desired multi-component alloy compositions was desired.

In connection with this, in the "method for manufacturing alloy nano powder" of Patent Document 1, an attempt was made to make alloy nano powder by electroplating a metal wire plated with dissimilar metals by plating dissimilar metals to metal wires.

As described above, when the electric explosion method is used, a large amount of nano powder can be obtained in a short time, and various studies on the electric explosion method have been conducted recently. In addition, the electric explosion method has been used to obtain powder of various soldering materials, but it is difficult to use the electric explosion method because it is difficult to produce a three-component wire as compared with a two-component wire which can be easily manufactured.

That is, although it is possible to produce a large amount of nano powder by using the electric explosion method, it is difficult to obtain a multi-component wire, and it is difficult to control the composition ratio, and thus a method for manufacturing wires of various multi-component alloy compositions is needed.

Therefore, when a wire is manufactured by a conventional drawing method, only a wire having a composition range capable of forming an alloy can be limited, and therefore, a method for manufacturing a wire having a composition different from that of the alloy forming range is required.

Korean Registered Patent No. 10-0753240, Aug. 22, 2007.

Disclosure of Invention Technical Problem [8] The present invention has been made to overcome the above-mentioned problems, and it is an object of the present invention to provide a lead-free solder manufacturing method using an electric explosion method for obtaining nanopowders of various multi- And to provide a manufacturing apparatus using the same.

According to another aspect of the present invention, there is provided a method of manufacturing a lead-free solder using an electric explosion method for obtaining nanopowders of various multi-component alloy compositions, the method comprising: melting an alloy composition in a crucible; The wire entering the crucible through the inlet port when the alloy composition melts by a predetermined amount; Coating the molten alloy composition on the wire surface introduced into the crucible; The coated wire is drawn out of the crucible through an outlet port and passed through a drying furnace and dried; Flowing the dried wire into the main chamber by a feeding roll; A step of electrically exploding the wire introduced into the main chamber by pulse power injected into the main chamber to form nanoparticles and disperse; And preparing the multi-component lead-free solder by using the nano-sized particles.

The alloy composition is characterized in that it is melted in the crucible under an induction current by an induction heating apparatus.

The alloy composition and the wire are characterized by being made of two or more kinds of metals.

In the step of manufacturing the multicomponent lead-free solder, the nano-sized particles are recovered and a photopolymerized resin is added to the recovered nano-sized particles to perform ultraviolet light curing treatment.

The photopolymerizable resin is characterized in that acetyl tributyl citrate and butanediol diacrylate are added to methyl methacrylate and benzoyl peroxide.

According to another aspect of the present invention, there is provided an apparatus for manufacturing lead-free solder using an electric explosion method for obtaining nano powders of various multicomponent alloy compositions, comprising a crucible into which an alloy composition is injected, An inlet port through which the wire is drawn in, an outlet port connected to the other side of the crucible to draw the wire out of the crucible, an induction coil wound around the crucible outer wall, and a current supply device for supplying current to the induction coil An induction heating device; A wire feeding part including a feeding roll which is carried in the crucible in which the molten alloy is accommodated and which draws the coated wire out of the crucible and guides the coated wire into the main chamber of the wire explosion device; And a wire explosion device including a main chamber into which the coated wire is introduced by the wire supply unit, a pulse power unit that provides pulse power in the main chamber, and a pulse power controller that controls the pulse power. .

And a drying furnace for drying the wire drawn out to the outside of the crucible is installed in the wire supplying section.

A method of manufacturing a lead-free solder using an electric explosion method for obtaining nanopowders of various multicomponent alloy compositions according to the present invention and a manufacturing apparatus using the same, There is an effect that can be made into nanoparticles by electric explosion method.

Further, by controlling the viscosity of the metal solution and the time for immersing the wire in the metal solution, various kinds of multicomponent wires can be produced, which can be widely used in various fields.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an apparatus for manufacturing lead-free solder using an electric explosion method for obtaining nanopowders of various multicomponent alloy compositions according to a preferred embodiment of the present invention; FIG.

Hereinafter, a method for manufacturing a lead-free solder using an electric explosion method for obtaining nanopowders of various multi-component alloy compositions of the present invention and a manufacturing apparatus using the same will be described in detail.

First, a method for manufacturing a lead-free solder using an electric explosion method for obtaining nanopowders of various multi-component alloy compositions according to a preferred embodiment of the present invention will be described.

More specifically, it begins with melting the alloy composition in the crucible 13, which means melting the alloy composition in the crucible 13 by preparing different metal materials and using an induction heating device, respectively. At this time, the induction heating apparatus applies an induction current to the crucible 13 so that the alloy composition is melted.

When the alloy composition is melted by a predetermined amount, the wire 100 flows into the crucible 13 through the inlet port 14, A wire composition 100 having a desired composition can be obtained by coating a molten alloy composition on the wire 100 in the crucible 13 through a dip coating method.

However, the alloy composition may be composed of two or more different metals. Likewise, the wire 100 flowing into the crucible 13 may also be composed of two or more different metals.

Here, the dip coating method is a method in which a precursor layer is formed on the surface of a material by immersing a material (which means a wire in the present invention) in a coating solution (which means a molten alloy composition in the present invention) or a slurry, . This method is suitable for processing relatively small products. It has the advantage that the surface of the material is uniform and the loss rate of the coating solution can be reduced as compared with the spray method. Accordingly, a multi-component wire having a desired composition can be obtained by dip coating a readily available wire on a molten alloy composition. In this case, the time required to dip the wire 100 into the molten alloy composition and the molten alloy composition Depending on the viscosity, the thickness at which the molten alloy composition is coated on the wire 100 is varied. Further, the composition (Wt%) of the alloy wire can be calculated by comparing the volume of the wire 100 before and after the coating of the molten alloy composition.

The wire 100 coated with the composition of the molten alloy in the crucible 13 is drawn out of the crucible 13 through the outlet port 15 and passes through the drying furnace 24 to be dried, Thereby eliminating byproducts that may remain in the wire, thereby facilitating nanoparticle formation of the wire through electrical explosion.

In the step of passing the dried wire 100 into the main chamber 32 while passing through the drying oven 24, the pair of feeding rolls 22a and 22b move the dried wire 100 into the main chamber 32, And further a motor for providing a rotational driving force of the feeding rolls 22a and 22b may be installed.

The wires introduced into the main chamber 32 are electrically explosed by the pulse power injected into the main chamber 32 to be nano-granulated and dispersed by a pulsed wire evaporation wet method and a dry method As the voltage is increased, the size of the particles is increased. The PWE method will be described in detail.

For example, two kinds of nanoparticles having an average diameter of 100 nm and 300 nm can be obtained by varying the voltage applied to the same wire of 0.3 mm in thickness by the dry method by the PWE method and the wet method in two ways. Therefore, when the electrical resistivity is measured according to the temperature of the hardener made of particles of 100 nm and 300 nm, the electrical resistance increases as the temperature increases, and as the particle size decreases at the same temperature, Lt; / RTI > This means that the particles are well dispersed and the electron conduction path is increased to improve the electrical characteristics. As the particle size decreases, the melting point of the alloy becomes lower.

The nanoparticles thus produced are recovered, a photopolymer resin is added to the recovered nanoparticles, and UV (ultraviolet) light curing treatment is performed to complete the lead-free solder. Herein, the composition of the photopolymerizable resin for UV curing is determined by adding 97.5% of MMA [Metyl methacrylate] (polymer), 2.5% of benzoyl peroxide (initiator, radical supplying agent), Acetyl tributylcitrate (plasticizer), and Butanediol diacrylate Thus, it is possible to manufacture multi-component lead-free solders by curing in a semi-transparent PE mold for 10 minutes at a maximum of 90 ° C in a light curing unit.

Next, an apparatus for manufacturing a lead-free solder using an electric explosion method will be described in order to obtain nano powders of various multi-component alloy compositions according to a preferred embodiment of the present invention.

However, the overlapping description of the method for manufacturing the lead-free solder using the electric explosion method will be omitted in order to obtain nanopowders of various multicomponent alloy compositions.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an apparatus for manufacturing lead-free solder using an electric explosion method to obtain nano powders of various multicomponent alloy compositions according to a preferred embodiment of the present invention. FIG.

Referring to FIG. 1, an apparatus for manufacturing lead-free solder using an electric explosion method for obtaining nanopowders of various multicomponent alloy compositions includes an induction heating apparatus 10, a wire supplying unit 20, and a wire explosion device 30, do.

The induction heating apparatus 10 includes a crucible 13 into which an alloy composition is injected, an inlet port 14 through which the wire 100 is led into the crucible 13 communicating with one side of the crucible 13, An outlet port 15 connected to the other side of the crucible 13 to draw the wire 100 out of the crucible 13, an induction coil 12 wound around the crucible outer wall, and an induction coil 12, And a current supply device 11 for supplying the current.

That is, the induction coil 12 is wound on the outer wall of the crucible 13, and the alloy composition in the crucible 13 is melted through the high frequency induction heating generated by the current flowing through the induction coil 12, 14 to the inside of the crucible 13 and coated on the surface of the wire 100 drawn out to the outlet port 15.

The wire supplying part 20 is carried in the crucible 13 containing the molten alloy and draws the coated wire 100 out of the crucible 13 to form the main chamber 32 of the wire explosion device 30. [ And feed rolls 22a and 22b for guiding inward.

At this time, the length of the wire 100 flowing into the main chamber 32 by the feeding rolls 22a and 22b can be adjusted to control the amount of nano powder of the multicomponent alloy composition required.

The wire explosion device 30 includes a main chamber 32, a pulse power device 34, and a pulse power controller 36. Here, the main chamber 32 is formed as a space into which the wire 100 coated by the wire supplying unit 20 flows, that is, a closed container shape, and the wire coated with the molten alloy is fed by the feeding rolls 22a and 22b And is supplied to the inside of the main chamber 32.

A pulse power is applied to the wire 100 by a pulse power controller 34 for providing pulse power in the main chamber 32 and a pulse power controller 36 for controlling the pulse power to generate electrical explosion, The nanoparticles of the nanoparticles are naturally dispersed so that the particles do not cohere with each other, and particles in the main chamber are not in contact with oxygen, so that surface oxidation of the particles does not occur.

Preferred embodiments of a method for manufacturing lead-free solder using an electric explosion method and a manufacturing apparatus using the same for obtaining nanopowders of various multi-component alloy compositions according to the present invention are as follows.

Example  One

(Sn) and zinc (Zn) were added into a crucible using high frequency induction heating by using the apparatus shown in FIG. 1 in an amount of 50 parts by weight to prepare a Sn-Zn melt. Then, a wire of 85Sn- 10 mm and a wire diameter of 0.3 mm) was introduced into the melt to coat the Sn-Zn melt on the surface of the 85Sn-15Al 2 composition wire, dried through a drying furnace, introduced into the main chamber, To electrically explode the wire in the main chamber to produce nanoparticles. The prepared nanoparticles were recovered and the resin added with 97.5% of photopolymerized resin (MMA [metyl methacrylate] (polymer)), acetyl tributylcitrate (plasticizer) and 2.5% of butanediol diacrylate (crosslinking agent) to 2.5% of benzoyl peroxide ) Were added and cured for 10 minutes in a translucent PE mold at 90 ° C in a light curing unit to prepare lead-free solder.

Specifically,

85Sn-15Al wire diameter: 0.3mm, length: 10mm

Wire volume: V = 0.7065 mm ³ = 0.0007065 cm ³

Wire density: 5.33g / cm ³

Wire mass: 0.003765 g

⇒ Dip coating (coating time: 2 ~ 4 sec) on 50Sn-50Zn melted at 400 ℃

Thickness of coated 50Sn-50Zn: 0.005mm-0.007mm

Coated 50Sn-50Zn ^{volume: 0.7544-0.7065 = 0.0479mm 3 = 0.0000479cm 3} ~ 0.7740-0.7065 = 0.0675mm 3 = 0.0000675cm 3

Density of 50Sn-50Zn: 7.21 g / cm < ³ >

Mass of coated 50Sn-50Zn: 0.0003454g to 0.0004867g

Mass ratio of Sn-Zn-Al = 0.003765 * 0.85 + 0.0003454 * 0.5: 0.0003454 * 0.5: 0.003765 * 0.15 = 82: 4.3: 13.7

     0.003765 * 0.85 + 0.0004867 * 0.5: 0.0004867 * 0.5: 0.003765 * 0.15 = 81: 5.7: 13.3

According to an embodiment of the present invention, when a two-component wire was immersed in a metal solution for about 2 to 4 seconds, a coating layer of 0.005 mm-0.007 mm was formed. The mass ratio of the three-component system can be calculated using the wire volume and density before and after coating.

That is, wires of 82Sn-4.3Zn-13.7Al to 81Sn-5.7Zn-13.3Al were obtained under the above conditions.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied otherwise without departing from the spirit and scope of the invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but are for the purpose of explanation, and the scope of technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the claims should be construed as being included in the scope of the present invention.

10: Induction heating device
11: Current supply
12: induction coil
13: Crucible
14: inlet port
15: outlet port
20:
22a, 22b: feeding roll
24: drying furnace
30: Wire explosion device
32: main chamber
34: Pulse power unit
36: Pulse power controller
100: wire

Claims (7)

Melting the alloy composition in the crucible (13);
When the alloy composition is melted by a predetermined amount, the wire (100) flows into the crucible (13) through the inlet port (14);
Coating the molten alloy composition on a surface of the wire (100) introduced into the crucible (13);
The coated wire 100 is drawn out of the crucible 13 through an outlet port 15 and passed through a drying oven 24 and dried;
Introducing the dried wire (100) into the main chamber (32) by the feeding rolls (22a, 22b);
The wire 100 flowing into the main chamber 32 is electrochemically exploded by the pulse power injected into the main chamber 32 to be nanopartized and dispersed; And
And forming the multi-component lead-free solder by using the nano-sized particles. The method of manufacturing the lead-free solder using the electric explosion method for obtaining the nanopowder of various multi-component alloy compositions. The method according to claim 1,
The above-
Free solder using electric explosion to obtain nano powder of various multicomponent alloy compositions, characterized in that an induction current is applied to the crucible (13) by induction heating to melt it. The method according to claim 1,
The alloy composition and the wire (100)
Free solder using an electric explosion method to obtain nano powders of various multi-component alloy compositions. The method according to claim 1,
In the step of manufacturing the multicomponent lead-free solder,
And recovering the nano-sized particles, adding a photopolymerizable resin to the recovered nano-sized particles, and subjecting the resultant nanoparticles to ultraviolet light curing, to obtain nano powders of various multicomponent alloy compositions. 5. The method of claim 4,
The light-
Methyl methacrylate and benzoyl peroxide,
A method for manufacturing a lead-free solder by using an electric explosion method to obtain nano powders of various multicomponent alloy compositions, wherein acetal tributyl citrate, butanediol diacrylate is added. An inlet port 14 through which the wire 100 is drawn into the crucible 13 in communication with one side of the crucible 13 and connected to the other side of the crucible 13; An outlet port 15 through which the wire 100 is drawn out of the crucible 13, an induction coil 12 wound around the crucible outer wall, a current supply device 11 for supplying current to the induction coil 12, (10);
A feeding roll which is carried in the crucible 13 containing the molten alloy and guides the coated wire 100 to the outside of the crucible 13 and into the main chamber 32 of the wire explosion device 30 22a, 22b; And
A main chamber 32 into which the coated wire 100 flows by the wire supplying unit 20, a pulse power unit 34 which supplies pulse power into the main chamber 32, a pulse controlling pulse power And a wire detonator (30) including a power controller (36). The apparatus for manufacturing lead-free solder using an electric detonation method for obtaining nanopowders of various multi-component alloy compositions. The method according to claim 6,
In the wire feeder 20,
And a drying furnace (24) for drying the wire (100) drawn out to the outside of the crucible (13) is installed in the crucible (13). The manufacturing method of lead - free solder using the electric explosion method for obtaining nanopowders of various multicomponent alloy compositions .

Images