KR20210013250A - Ceramics joined tool for heat resistant steel - Google Patents

Abstract

The present invention relates to a ceramic bonding tool for processing a high heat-resistant steel part, which comprises: a first base material including a ceramic, and having a processing tip unit for processing a high heat-resistant steel material; a second base material including cemented carbide or metal, and bonded to the first base material; a notch bonding unit formed in a notch shape in a bonding unit between the first and second base materials, and including an intaglio notch unit formed to be recessed on one side of the first and second base materials and an embossed notch unit formed to protrude in a shape to correspond to the intaglio notch unit on the other side of the first and second base materials; a bonding material filling groove unit formed to be recessed in a continuous linear shape on the notch bonding unit, and including a first filling groove unit formed on the intaglio notch unit and a second filling groove unit for communicating with the first filling groove unit in a state that the intaglio notch unit and the embossed notch unit are in contact with each other; and a different bonding material including an active metal, filled in the bonding material filling groove unit, and having one side bonded to the first base material, and the other side bonded to the second base material. The different bonding material has a structure in which columns of a polygonal cross-sectional shape with a hollow inner part are continuously connected, and has one side arranged inside the first filling groove unit and the other side arranged inside the second filling groove unit across the notch bonding unit. Moreover, the bonding material filling groove unit is formed in a honeycomb shape.

Description

Ceramic bonding tool for processing high heat-resistant steel parts {CERAMICS JOINED TOOL FOR HEAT RESISTANT STEEL}

The present invention relates to a ceramic bonding tool for processing high heat-resistant steel parts, and more particularly, to a ceramic bonding tool for processing high heat-resistant steel parts in which a ceramic material is bonded to a contact portion in contact with a high heat-resistant steel material when processing a high heat-resistant steel material.

In general, heat resisting steel is a steel used at a high temperature of about 550°C or higher, and its strength at high temperatures (cream strength, high temperature short-term tensile strength, high temperature fatigue strength, etc.), corrosion resistance (sulfur resistance, V2O5 resistance) Properties, etc.) and oxidation resistance. In addition, high heat-resistant steel (高耐熱鋼) means an alloy steel material that stably implements mechanical strength and corrosion resistance even at a high temperature of 800°C or higher in realizing the characteristics of such heat-resistant steel.

When processing a high heat-resistant steel material, heat is generated due to frictional contact between the high-speed rotating tool and the high heat-resistant steel material, and the wear of the tool rapidly proceeds due to this frictional heat, and the life of the tool is remarkably low. In order to solve this problem, various technologies have been attempted to combine cemented carbide or ceramics having better heat resistance than metals.

However, conventionally, the application is limited by a method of fastening a first material made of ceramic to a second material made of cemented carbide or metal using a separate fastening means such as a bolt, etc., and such a structure has a large diameter Although it can be applied to a tool having a small size, it is difficult to process and it is difficult to stably secure a coupling force by a fastening means, so that the application is difficult. Therefore, there is a need to improve this.

The background technology of the present invention is disclosed in Korean Patent Application Publication No. 2019-0018089 (published on February 21, 2019, title of invention: bonding device for heterogeneous materials).

In the present invention, it is possible to stably implement the bonding force between the ceramic material and the metal, so that the wear of the tool due to heat generated during processing of the high heat-resistant steel material can be further reduced regardless of its diameter, and the life of the tool itself can be further extended. It is an object of the present invention to provide a ceramic bonding tool for machining high heat resistant steel parts.

The ceramic bonding tool for processing high heat-resistant steel parts according to the present invention includes: a first base material comprising ceramic and having a processing tip portion capable of processing a high heat-resistant steel material; A second base material comprising cemented carbide or a metal and bonded to the first base material; A notched joint formed in a notch shape at a joint between the first base material and the second base material; A joint material filling groove formed to be recessed in a continuous linear shape on the notch joint; And a dissimilar material bonding material which is filled in the bonding material filling groove including an active metal, one side is bonded to the first base material, and the other side is bonded to the second base material.

The notch joint may include a concave notch portion formed to be recessed in one side of the first base material and the second base material; And a relief notch portion formed to protrude from the other side of the first base material and the second base material in a shape corresponding to the intaglio notch portion, and in surface contact with the intaglio notch portion.

The bonding material filling groove portion, a first filling groove formed on the intaglio notch portion; And a second filling groove formed on the embossed notch portion and communicating with the first filling groove portion in a state in which the concave notch portion and the embossed notch portion abut.

The dissimilar material bonding material has a structure in which pillars having a polygonal cross-sectional shape with a hollow inside are connected in series, and one side is disposed inside the first filling groove, and the other side crosses the notch junction, and the second filling groove is It characterized in that it is disposed inside.

The bonding material filling groove is characterized in that the molten dissimilar bonding material is flowed by a capillary phenomenon and is formed to have a fillable width.

The bonding material filling groove is characterized in that it is formed in a honeycomb shape.

In the ceramic bonding tool for processing high heat-resistant steel parts according to the present invention, a notched joint is formed in the joint between the first base material including ceramic and the second base material including cemented carbide or metal, thereby making the joint between the first base material and the second base material flat. Compared to the embodiment formed into a shape, the joint area between the first and second base materials can be further expanded, and the torsional stiffness can be further improved, so that it can be usefully applied as a tool for processing high heat-resistant steel materials by rotational force. have.

In addition, in the present invention, a bonding material filling groove is formed in the junction between the first base material including ceramic and the second base material including cemented carbide or metal, and a dissimilar material bonding material containing active metal is filled inside the bonding material filling groove. By still melting and curing, the first base material and the second base material can be bonded through the dissimilar material bonding material.

In addition, the present invention is arranged to extend across the joint material filling groove formed in the first base material and the bonding material filling groove formed in the second base material across the notch joint, so that the entire joint material filling groove formed in a linear shape By controlling the length and depth, it is possible to stably secure the bonding strength between the dissimilar material bonding material and the first base material, and the dissimilar material bonding material and the second base material.

Accordingly, the present invention, in application as a tool for processing a high heat-resistant steel material, the first base material containing ceramics having superior heat resistance than cemented carbide or metal material, when processing high heat-resistant steel, the processing tip part which is in major friction contact with the high heat-resistant steel By constituting, compared to the embodiment in which the entire tool is made of a cemented carbide or metal material, the processing quality of the high heat-resistant steel material can be improved, and the life of the tool itself can be further extended.

In addition, according to the present invention, the bonding strength between the first base material and the second base material can be stably secured by using the dissimilar material bonding material, compared with the embodiment in which the first base material and the second base material are fastened using separate fastening means, It can be stably applied not only when it has a relatively large diameter, but also when it has a small diameter, that is, regardless of the diameter.

1 is a perspective view schematically showing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention.
2 is a perspective view schematically showing a state before forming a processing tip portion of a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention.
3 is an exploded perspective view of a main part of FIG. 2.
4 is a side view of FIG. 2.
5 is a flowchart illustrating a method of manufacturing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention.
6 is a perspective view schematically showing a state in which a weight body is seated on a first base material in a weight body mounting step of a method of manufacturing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention.
7 is a perspective view schematically showing a weight body applied to a weight body seating step of a method of manufacturing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention.
8 is a graph illustrating a temperature profile in a bonding material melting step and a bonding material cooling step of a method of manufacturing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention.

Hereinafter, an embodiment of a ceramic bonding tool for processing high heat-resistant steel parts according to the present invention will be described with reference to the accompanying drawings. In this process, thicknesses of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is a perspective view schematically showing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention, and FIG. 2 is to form a processing tip of a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention. It is a perspective view schematically showing the previous state, FIG. 3 is an exploded perspective view of a main part of FIG. 2, and FIG. 4 is a side view of FIG. 2.

1 and 2, a ceramic bonding tool 1 for processing high heat-resistant steel parts according to an embodiment of the present invention includes a first base material 10, a second base material 20, a notched joint 30, and a bonding material filling It includes a groove part 40, a dissimilar material bonding material 50.

In general, heat resisting steel refers to steel used at high temperatures of about 550°C or higher, and strength at high temperatures (cream strength, high temperature short-term tensile strength, high temperature fatigue strength, etc.), corrosion resistance (sulfur resistance, V2O5 resistance, etc.), has good oxidation resistance. High heat-resistant steel (高耐熱鋼) in realizing the characteristics of the heat-resistant steel as described above, refers to an alloy steel material that stably implements mechanical strength and corrosion resistance even at a high temperature of 800°C or higher.

The ceramic bonding tool (1) for processing high heat-resistant steel parts according to the present invention is a tool for processing such a high-heat-resistant steel material, and the end that comes into contact with the high-heat-resistant steel material is composed of a ceramic material having better heat resistance than cemented carbide or metal. This is to improve the machining quality and extend the life of the tool itself by reducing the wear of the tool due to high heat generated in the frictional contact area with the high heat-resistant steel when processing the heat-resistant steel material.

The first base material 10 is made of ceramic, and a processing tip part 60 capable of processing a high heat-resistant steel material is formed. As the material of the first base material 10, a ceramic material having a heat resistance superior to that of a cemented carbide or metal material may be used. The second base material 20 is made of a cemented carbide or metal, and is bonded to the first base material 10 through a dissimilar material bonding material 50. As a material of the second base material 20, a cemented carbide or metal generally used for machining may be applied.

Hereinafter, as shown in FIG. 2, the first base material 10 and the second base material 20 in a state of being bonded to each other are referred to as a tool body part 2. The processing tip portion 60 has a shape capable of machining a material by rotational force, pressing force, etc., for example drilling. The tool body portion 2 has a cylindrical shape as a whole, and the processing tip portion 60 can be processed into various shapes according to the processing method of the high heat-resistant steel material. Although the shape of the processing tip part 60 for drilling is shown in FIG. 1, this is disclosed as an example of implementing machining by rotational force, and the shape of the processing tip part 60 is not intended to be limited thereto.

When the length of the axial direction (z direction in FIG. 2) of the first base material 10 in contact with the high heat-resistant steel material is longer than the extension length of the processing tip part 60, the processing tip part 60 is limited only on the first base material 10. It may be formed, and when the length of the first base material 10 is shorter than the extension length of the processing tip portion 60, it may be formed to extend over not only the first base material 10 but also the second base material 20.

The notched joint 30 is formed in a notch shape at the joint between the first base material 10 and the second base material 20. In general, a portion of a mechanical structural member in which there is a rapid change in cross-sectional shape is called a notch. In the present invention, the notch protrudes toward the second base material 20 or the opposite reverberation when the first base material 10 is referenced. It means that it is formed to be depressed. 3 and 4, the notch joint 30 according to an embodiment of the present invention includes a concave notch 31 and a positive notch 32.

The intaglio notch 31 is formed to be recessed in one of the first base material 10 and the second base material 20. The embossed notch 32 is formed to protrude in a shape corresponding to the engraved notch 31 on the other side of the first base material 10 and the second base material 20 and is in surface contact with the engraved notch 31. In an embodiment of the present invention, the intaglio notch 31 is formed in a'V' cross-sectional shape on the second base material 20, and has a constant cross-sectional shape from one end in the x direction to the other end of the second base material 20 , It is formed to extend with a width. The embossed notch 32 is formed in a'V' shape corresponding to the engraved notch 31 on the first base material 10 and is fitted into the engraved notch 31.

By forming a notched joint 30 at the junction between the first base material 10 including ceramic and the second base material 20 including cemented carbide or metal, between the first base material 10 and the second base material 20 Compared with the embodiment in which the joint is formed in a flat shape, the joint area between the first base material 10 and the second base material 20 can be further expanded and the torsional stiffness can be further improved. It can be usefully applied as a machining tool.

In addition, by forming the notch joint 30 in a'V' cross-sectional shape as described above, it is possible to secure the ease of processing of the notch joint 30, and the embossed notch 32 is formed on the first base material 10 By doing so, compared to the embodiment in which the embossed notch 32 is formed on the second base material 20, the rigidity of the joint portion of the first base material 10, which mainly imparts a processing force to the high heat-resistant steel material, is more specifically The maximum thickness of the joint portion of the first base material 10 can be more stably secured.

The bonding material filling groove portion 40 is a device portion in which the dissimilar material bonding material 50 is filled and bonded, and is continuous on the notch bonding portion 30, more specifically on the intaglio notch portion 31 and the relief notch portion 32. It is formed to be recessed in a linear shape. Referring to FIG. 3, the bonding material filling groove portion 40 according to an embodiment of the present invention includes a first filling groove portion 41 and a second filling groove portion 42.

The first filling groove 41 is formed on the intaglio notch 31. The second filling groove portion 42 is formed on the relief notch portion 32, and communicates with the first filling groove portion 41 in a state in which the intaglio notch portion 31 and the relief notch portion 32 abut. The bonding material filling groove 40 is formed with a width d that can flow along the extension direction by a capillary phenomenon in a state in which the dissimilar bonding material 50 is melted.

The bonding material filling groove portion 40 according to an embodiment of the present invention is formed to be recessed in a linear shape, and the polygonal cross section extends to form a continuous connected shape. Bonding material filling groove portion 40 according to an embodiment of the present invention It is formed in a honeycomb shape. By forming the bonding material filling groove 40 in a honeycomb shape, the dissimilar material bonding material 50 can be uniformly distributed in all directions 360° based on the z-axis, and accordingly, compared to the embodiment having a specific direction, z Bonding stiffness against rotational force with the direction as the center of rotation can be stably realized

The dissimilar material bonding material 50 is filled in the bonding material filling groove 40 including an active metal, one side is bonded to the first base material 10, and the other side is bonded to the second base material 20. More specifically, one side in the z direction of the dissimilar material bonding material 50 is disposed inside the first filling groove 41, and the other side in the z direction crosses the notch joint 30 and is disposed inside the second filling groove 42 do. Accordingly, the dissimilar material bonding material 50 is formed in a shape in which the first filling groove part 41 and the second filling groove part 42 are connected to each other between the first base material 10 and the second base material 20.

That is, the dissimilar material bonding material 50 has a structure in which pillars having a polygonal cross-sectional shape with a hollow interior are connected in succession, as shown in FIG. 3, and has a shape extending across the notch joint 30 in the z-axis direction. When the bonding material filling groove 40 is formed in a honeycomb shape, the dissimilar material bonding material 50 has a honeycomb shape corresponding thereto.

Since the dissimilar material bonding material 50 is disposed to extend across the notch bonding portion 30, the bonding material filling groove 40 formed in the first base material 10 and the bonding material filling groove 40 formed in the second base material 20 , By adjusting the total length, depth, etc. of the bonding material filling groove 40 formed in a linear shape, between the dissimilar material bonding material 50 and the first base material 10, the dissimilar material bonding material 50 and the second base material 20 Bonding strength can be secured stably.

As the material of the dissimilar bonding material 50, an active metal, which is a silver (Ag)-copper (Cu)-titanium (Ti)-based alloy, may be used. Here, the active metal refers to a material having bonding property with ceramic as well as metal. The dissimilar material bonding material 50 is produced in the form of a paste by stirring silver (Ag), copper (Cu), and titanium (Ti) powder at a desired ratio, and then applying it to the notched joint 30 while applying the inside of the filling groove 40 It can flow into and fill in.

The dissimilar material bonding material 50 containing the active metal as described above is heated to the melting temperature or higher of the dissimilar material bonding material 50 in the state filled in the inside of the bonding material filling groove 40 to melt the dissimilar material bonding material 50 By cooling to below temperature and curing, the first base material 10 and the second base material 20 may be bonded through the dissimilar material bonding material 50. In a state in which the dissimilar material bonding material 50 is melted, the dissimilar material bonding material 50 naturally flows along the bonding material filling groove portion 40 by a capillary phenomenon, without a gap, that is, a hollow portion over the entire length of the bonding material filling groove portion 40 It is continuously extended and filled without.

5 is a flowchart illustrating a method of manufacturing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention, and FIG. 6 is a manufacturing method of a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention. It is a perspective view schematically showing a state in which the weight body is seated on the first base material in the weight body mounting step of the method.

7 is a perspective view schematically showing a weight body applied to a weight body seating step of a method of manufacturing a ceramic bonding tool for processing high heat-resistant steel parts according to an embodiment of the present invention, and FIG. 8 is It is a graph showing the temperature profile in the bonding material melting step and the bonding material cooling step of the manufacturing method of a ceramic bonding tool for processing high heat-resistant steel parts.

Hereinafter, in describing a method of manufacturing a ceramic bonding tool 1 for processing high heat-resistant steel parts according to an embodiment of the present invention with reference to FIGS. 5 to 8, ceramic for processing high heat-resistant steel parts according to an embodiment of the present invention For the same or corresponding configuration as the joining tool 1, the redundant description thereof is omitted.

Referring to FIG. 7, a method of manufacturing a ceramic bonding tool 1 for processing high heat-resistant steel parts according to an embodiment of the present invention includes a notch processing step (S1), a bonding groove adding step (S2), a bonding material application step (S3), It includes a bonding material drying step (S4), a base material setting step (S5), a bonding material melting step (S6), a bonding material cooling step (S7), and a tool processing step (S8).

In the notch processing step (S1), the ends of the first base material 10 including ceramic and the second base material 20 including cemented carbide or metal are processed into a notch shape that engages with each other. That is, the first base material 10 and the second base material 20, the notch joint 30, more specifically, the second base material 20 and the first base material 10, respectively, the intaglio notch 31 and embossed A notch 32 is formed.

In the joining groove adding step (S2), as shown in FIG. 3, the joining material filling groove 40 is formed in a continuous linear shape on the notched joint 30. The process of forming the bonding material filling groove portion 40 includes forming the second filling groove portion 42 in the concave notch portion 31, and forming the first filling groove portion 41 in the relief notch portion 32 do. The first filling groove portion 41 and the second filling groove portion 42 may be formed by laser engraving the intaglio notch portion 31 and the relief notch portion 32.

In the bonding material application step (S3), the dissimilar material bonding material 50 is filled in the inside of the bonding material filling groove 40. In a state in which the dissimilar material bonding material 50 in a paste form containing an active metal is applied to the surfaces of the concave notch portion 31 and the concave notch portion 32, the dissimilar material bonding material 50 is pressed to the bonding material filling groove 40 By inserting into, the dissimilar material bonding material 50 can be easily filled into the inside of the bonding material filling groove 40 in a room temperature environment.

In the bonding material drying step (S4), the first base material 10 to which the dissimilar material bonding material 50 is applied and the second base material 20 coated with the dissimilar material bonding material 50 are placed in a temperature atmosphere lower than the melting temperature of the dissimilar material bonding material 50. (For example, 200°C, etc.) to dry the dissimilar material bonding material 50. While going through the bonding material drying step (S4), the dissimilar material bonding material 50 is formed on the embossed notch 32 and the first filling groove 41 formed on the first base material 10, and the second base material 20. It is attached to each of the intaglio notch portion 31 and the second filling groove portion 42 in a dried state.

In the base material setting step (S5), the first base material 10 and the second base material 20 to which the dissimilar material bonding material 50 is attached are brought into contact with each other, and more specifically, the intaglio notch part 31 The notch 32 is set to abut, in other words, the first filling groove 41 and the second filling groove 42 abut. Referring to Figure 5, the base material setting step (S5) according to an embodiment of the present invention includes a base material stacking step (S4-1) and a weight body seating step (S4-2).

In the base material lamination step (S4-1), the first base material 10 is stacked on the upper side of the second base material 20. At this time, the lower end of the embossed notch 32 formed at the lower end of the first base material 10 is engaged and contacted with the upper part of the concave notch 31 formed at the upper end of the second base material 20. In the weight body seating step (S4-2), the weight body 3 having a set weight is mounted on the upper side of the first base material 10, so that thermal expansion, etc., while passing through the bonding material melting step (S6) and the bonding material cooling step (S7). This prevents the occurrence of lifting between the first base material 10 and the second base material 20.

6 and 7, the weight 3 according to an embodiment of the present invention includes a seating part 4, a first anti-flow leg part 5, and a second anti-flow leg part 6 do.

The seating portion 4 has a columnar shape corresponding to the upper end of the first base material 10, but the first so as not to inhibit heat transfer from a heating member such as a heating lamp provided in the vacuum welding device to the dissimilar material bonding material 50. It has a diameter smaller than that of the base material 10 and is seated on the flat upper end of the first base material 10. The seating portion 4 has a set weight together with the first flow prevention leg portion 5 and the second flow prevention leg portion 6, and applies the first base material 10 to the second base material 20 with a corresponding pressing force. ) Is pressed downward.

The first anti-flow leg part 5 is a device part contacting one end of the first base material 10 and the second base material 20 in the x direction, and extends downward from one side of the seating part 4, and the first base material ( It is formed with a length longer than the extension length of 10). The upper portion of the first flow preventing leg portion 5 is coupled to the seating portion 4 at a position spaced apart from the lower end of the seating portion 4 and formed to extend in the x direction.

Accordingly, a passage through which air can pass is formed between the upper portion of the first flow prevention leg portion 5 and the first base material 10, and the heat transfer degradation due to the first flow prevention leg portion 5 is minimized. can do. The lower portion of the first anti-flow leg portion 5 is formed to extend in the -z direction, and sequentially contacts the first base material 10, the notched joint 30, and the first base material 10 from the upper side.

The second anti-flow leg part 6 is a device part in contact with the other end of the first base material 10 and the second base material 20 in the x direction, extends downward from the other side of the seating part 4, and extends downward from the first base material ( 10) and the second base material 20 is formed to face the second flow-preventing leg (6). More specifically, the second flow-preventing leg portion 6 is formed to be symmetrical with the first flow-preventing leg portion 5 based on the central portion of the first base material 10 and the second base material 20.

The notched joint 30 is formed to extend from one end in the x direction of the first base material 10 to the other end with a constant cross-sectional shape, and the first flow prevention leg 5 is in the x direction of the first base material 10 At a position corresponding to one end, the first base material 10, the notch joint, and the second base material 20 are in continuous contact, and the second anti-flow leg part 6 is the other end in the x direction of the first base material 10 At a position corresponding to the first base material 10, the notch joint 30, and the second base material 20 in continuous contact.

The weight body 3, in particular, the first flow prevention leg portion 5 and the second flow prevention leg portion 6 are made of a metal material, as shown in FIG. In the state of being seated on the base material 10, the first base material 10 and the second base material 20 are in elastic contact with both sides in the x direction. In a state in which the first and second anti-flow legs 5 and 6 are in elastic contact with the first and second base materials 10 and 20 at both sides in the x direction, the first base material 10 The central axis of rotation of the and the second base material 20, that is, the central portion is naturally located coaxially.

In the state in which the first base material 10 is stacked on the second base material 20, the first base material between the first flow prevention leg part 5 and the second flow prevention leg part 6 of the weight body 3 When the weight body 3 is mounted on the first base material 10 so that the (10) is positioned, the rotational center axis of the first base material 10 and the second base material 20 naturally coincide, and the x-direction randomly The flow can be stably restrained by the elastic force.

Accordingly, it is possible to stably prevent the rotation center axis of the first base material 10 and the second base material 20 from being shifted during the bonding material melting step (S6) and the bonding material cooling step (S7). The rotational center axis of the first base material 10 and the second base material 20 is shifted in the y direction, the concave notch portion 31 and the positive notch portion having a shape extending in the x direction and having an inclined surface in the y direction. It is naturally prevented by (32).

By pressing the first base material 10 downward with a set load (set weight) toward the second base material 20 using the weight body 3, the lifting between the first base material 10 and the second base material 20 is stably prevented. This can be prevented, and leakage of the dissimilar material bonding material 50 due to the occurrence of a gap between the first base material 10 and the second base material 20 and a decrease in bonding strength can be prevented. In addition, it is possible to match the central axis of the first base material 10 and the second base material 20 by using the first anti-flow leg part 5 and the second anti-flow leg part 6 of the weight body 3, It is possible to prevent defects due to the misalignment of the central axes of the first base material 10 and the second base material 20.

The first anti-flow leg part 5 and the second anti-flow leg part 6 are on the first anti-flow leg part 5 and the second anti-flow leg part 6 extending in the -z direction in the x direction. By forming the bent portion 7 of, only a portion corresponding to the lower end of the lower portion extending in the -z direction (hereinafter referred to as'elastic contact portion 8') is the first base material 10 and the second base material 20 It has a structure in contact with ). More specifically, the first flow-preventing leg portion 5 has a bent portion 7 that is bent in the x direction, and the second flow-prevention leg portion 6 has a bent portion 7 that is bent in the -x direction. .

As described above, by forming a bent portion 7 under the first flow prevention leg portion 5 and the second flow prevention leg portion 6, the first flow prevention leg portion 5 and the second flow prevention leg portion The elastic contact part 8 of (6) clearly makes elastic contact with the first base material 10, the second base material 20, and the notch joint 30, while preventing the first flow prevention leg part 5 and the second flow prevention The rest of the leg part 6 is clearly separated from the first base material 10 and the second base material 20, so that the first flow prevention leg 5 and the second flow prevention leg 6 1 It is possible to minimize interference and inhibition of heat transfer to the base material 10.

In the bonding material melting step (S6), the first base material that is set in contact with the notch bonding portions 30, more specifically, the concave notch portions 31 and the embossed notch portions 32 are stacked in a vertical direction to make contact with each other. 10) and the second base material 20 in a temperature atmosphere higher than the melting temperature of the dissimilar material bonding material 50 and lower than the melting temperature of the first base material 10 and the second base material 20 (for example, 180°C). By exposure for a set time (eg, 30 minutes, etc.), the dissimilar material bonding material 50 is melted.

The bonding material melting step (S6) is performed in a state in which the first base material 10 is pressed toward the second base material 20 with the weight 3, and the molten dissimilar material bonding material 50 is subjected to a capillary phenomenon. It flows along 40) and is filled over the entire area of the bonding material filling groove 40. This bonding material melting step (S6) is performed in a vacuum atmosphere (eg, 10 ^-4 torr) to prevent oxidation of the second base material 20 and the dissimilar material bonding material 50 at high temperature.

In the bonding material cooling step (S7), the first base material 10, the second base material 20, and the dissimilar material bonding material 50 are cooled to a temperature lower than the melting temperature of the dissimilar material bonding material 50 (for example, natural cooling). , By cooling and hardening the dissimilar material bonding material 50, the first base material 10, the second material material 20, and the dissimilar material bonding material 50 are integrally combined to form a tool body part 2 having a structure. In step S8, the tool body portion 2 is cut into a shape for processing a high heat-resistant steel material to form a processing tip portion 60.

In successively performing the bonding material melting step (S6) and the bonding material cooling step (S7), according to the temperature profile as shown in FIG. 8, the temperature is gradually varied and increased, and the temperature is gradually changed and lowered. Go through. By gradually varying the temperature in this way, a thermal shock phenomenon in which thermal stress is shockedly induced in the first base material 10, the second base material 20, and the dissimilar material bonding material 50 due to a rapid temperature change. Can be prevented from occurring.

According to the ceramic bonding tool (1) for processing high heat-resistant steel parts according to the present invention and a manufacturing method thereof having the configuration as described above, the first base material 10 including ceramic, and the second base material 20 including cemented carbide or metal. ), compared with the embodiment in which the joint between the first base material 10 and the second base material 20 is formed in a flat shape by forming the notched joint 30 at the junction between the first base material 10 and the second base material ( 20) It is possible to expand the joint area between the two and improve the torsional stiffness more, and thus, it can be usefully applied as a tool for processing high heat-resistant steel materials by rotational force.

In addition, according to the present invention, the bonding material filling groove 40 is formed at the junction between the first base material 10 including ceramic and the second base material 20 including cemented carbide or metal, and the bonding material filling groove 40 The first base material 10 and the second base material 20 can be bonded through the dissimilar material bonding material 50 by melting and curing the dissimilar material bonding material 50 containing the active metal in the inside of the material.

In addition, according to the present invention, the dissimilar material bonding material 50 crosses the notch bonding portion 30, the bonding material filling groove portion 40 formed in the first base material 10, and the bonding material filling groove portion 40 formed in the second base material 20 ) By adjusting the total length, depth, etc. of the bonding material filling groove 40 formed in a linear shape by being disposed to extend over the dissimilar material bonding material 50, the first base material 10, and the dissimilar material bonding material 50 Bonding strength between the second base materials 20 can be stably secured.

Accordingly, according to the present invention, in application as a tool for processing high heat-resistant steel materials, when processing high heat-resistant steel with the first base material 10 including ceramics having superior heat resistance than cemented carbide or metal materials, friction contact mainly with high heat-resistant steel By configuring the processing tip portion 60 to be used, compared to the embodiment in which the entire tool is made of a cemented carbide or a metal material, the processing quality of the high heat-resistant steel material can be improved, and the life of the tool itself can be further extended.

In addition, according to the present invention, the bonding strength between the first base material 10 and the second base material 20 can be stably secured by using the dissimilar material bonding material 50, so that the first base material 10 and the second base material 20 Compared with the embodiment in which) is fastened using a separate fastening means, it can be stably applied not only when it has a relatively large diameter, but also when it has a small diameter, that is, regardless of the diameter.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

1: ceramic bonding tool 2: tool body
3: weight 4: seat
5: first anti-flow leg part 6: second anti-flow leg part
7: bent part 8: elastic contact part
10: first base material 20: second base material
30: notch joint 31: intaglio notch
32: embossed notch 40: bonding material filling groove
41: first filling groove 42: second filling groove
50: dissimilar material bonding material 60: processing tip portion
d: width

Claims (1)

A first base material comprising ceramic and having a processing tip portion capable of processing a high heat-resistant steel material;
A second base material comprising a cemented carbide or a metal and bonded to the first base material;
An intaglio notch part formed in a notch shape at the junction between the first base material and the second base material and recessed in one side of the first base material and the second base material, and the other side of the first base material and the second base material A notch joint including an embossed notch protruding in a shape corresponding to the engraved notch;
A state in which the first filling groove is formed on the notch joint to be recessed in a continuous linear shape, is formed on the concave notch, and is formed on the concave notch, and the concave notch and the positive notch are in contact with each other A bonding material filling groove including a second filling groove in communication with the first filling groove; And
A dissimilar material bonding material is filled in the bonding material filling groove including an active metal, one side is bonded to the first base material, and the other side is bonded to the second base material; Including,
The dissimilar material bonding material,
It has a structure in which pillars having a polygonal cross-sectional shape with a hollow inside are connected continuously, and one side is disposed inside the first filling groove, the other side is disposed inside the second filling groove across the notch joint,
Ceramic bonding tool for processing high heat-resistant steel parts, characterized in that the bonding material filling groove is formed in a honeycomb shape.

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