JP2005299817A - Fixing method for ceramic member and metallic member and composite member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing method for ceramics having excellent durability and a metallic member and to provide a composite member. <P>SOLUTION: In this fixing method for joining a ceramic member and the metallic member by a bolt, a member having a female screw machined part in a tapered hole is inserted after aligning positions of the tapered hole and the female screw machined part, the bolt is inserted from a metallic member side, and the female screw machined part and the bolt are tightened when fixing the ceramic member provided with the tapered hole which becomes narrow on the metallic member side and the member provided with the female screw machined part following the tapered hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for fixing a ceramic member and a metal member, and a composite member.

  For example, when steel products such as feeders, hoppers, crushing guides, conveyance and exhaust paths are not able to obtain sufficient wear resistance and corrosion resistance with conventional metal materials, in order to improve their properties, In many cases, a ceramic plate is fixed to a portion exposed to a sliding portion or a corrosive gas. As the fixing method, as seen in Patent Document 1, Patent Document 2 and Patent Document 3, a through-hole provided with a counterbore structure on a ceramic plate for passing a countersunk screw, a sliding part or a corrosive gas is used. There were many cases where a groove was provided on the back of the exposed surface and fixed with an adhesive.

Japanese Utility Model Publication No. 55-67014 Japanese Patent Laid-Open No. 2-126976 Japanese Unexamined Patent Publication No. 5-57244

  However, in the fixing method as described above, when the countersunk screw is worn or corroded to the position where the counterbore part and the metal countersunk hook (jaw part) disappear, the ceramic plate easily falls off and the durability is insufficient. The steel material that is exposed is not exposed, and a sufficient service life cannot be obtained, and the fixing method that gives grooving to the back requires complicated machining for difficult-to-machine ceramics, and the positioning accuracy of the groove is sufficient. It was difficult to say, and wobble was likely to occur, and cracks were likely to develop at the corners at the back of the groove. Therefore, there was a problem that the service life was short and replacement was not easy.

  Therefore, the present invention was devised in view of the conventional problems as described above, and an object of the present invention is to provide a method for fixing a ceramic and a metal member having excellent durability and a composite member. .

The method for fixing wear-resistant and corrosion-resistant ceramics and metal members according to the present invention is, for example, in a metal manufacturing facility that transports, crushes, classifies, mixes and puts various raw materials in a structure in which a ceramic plate is joined with bolts. The bolt is completely sunk into the female threaded member inserted into the taper hole of the ceramic plate, and the bolt penetrates the metal member and is fixed from the metal member side. It is characterized by. That is, the gist of the present invention is as follows.
(1) In a fixing method in which a ceramic member and a metal member are joined with a bolt, when the ceramic member provided with a tapered hole narrowing on the metal member side and the metal member provided with a through hole are fixed, the tapered hole and the through hole are fixed. A ceramic member characterized in that after aligning the holes, a member having a female screw machining portion is inserted into the tapered hole, and a bolt is inserted from the metal member side, and the female screw machining member and the bolt are bolted. And fixing method of metal parts.
(2) The method for fixing a ceramic member and a metal member according to (1), wherein the member having the female screw processed portion has a shape following the shape of the tapered hole of the ceramic member.
(3) The method for fixing a ceramic member and a metal member according to (1), wherein the female screw machining portion of the member having the female screw machining portion is a through hole penetrating the member.
(4) The method for fixing a ceramic member and a metal member according to (1), wherein the female screw processed portion of the member having the female screw processed portion is a single closed hole that does not penetrate the member.
(5) The ceramic member according to any one of (1) to (4), wherein the female threaded member is made of wear-resistant steel, ductile steel, low thermal expansion steel, heat-resistant steel, cemented carbide, or ceramics. A method for fixing a metal member.
(6) The method for fixing a ceramic member and a metal member according to (1), wherein a counterbore in which a top portion of the bolt sinks into the metal member is formed.
(7) A composite member formed by combining a ceramic member and a metal member, wherein the ceramic member has a tapered hole that narrows toward the metal member side, the metal member has a through hole, and a female screw machining portion A composite member formed by fitting a member having the tapered hole into the tapered hole and coupling the female thread processed portion and a bolt.
(8) The composite member according to (7), wherein the shape of the female threaded member is a shape that follows the shape of the tapered hole of the ceramic member.
(9) The composite member according to (7), wherein the female screw processed portion is a through hole.
(10) The composite member according to (7), wherein the female screw processed portion is a single-closed hole.
(11) The composite member according to (7), wherein the metal member has a counterbore in a through-hole portion on a side opposite to a joint surface with the ceramic member.

When the method for fixing a ceramic member and a metal member according to the present invention is applied to, for example, a lining structure for a steelmaking facility, the period until the bolt, which is a joining means between the steel material and the ceramic plate, is worn out is extremely long, and the back side This eliminates the need for complicated machining and increases the length of the support so that wobble is suppressed. The durability and life of the liner itself are significantly improved as the wear and corrosion resistant ceramic plate is reduced. To be.
In addition, since the thickness of the ceramic plate can be freely set according to the use and purpose for each use environment, it is possible to greatly reduce the construction cost and the construction period.

As a result of various studies to achieve the above object, the present inventors have found that ceramics having excellent wear resistance, corrosion resistance, etc. as manufacturing equipment that requires a durable layer such as wear resistance, corrosion resistance, etc. For example, a grain boundary phase is highly crystallized with a crystal phase having a high melting point (for example, an auxiliary component made of oxide or oxynitride that promotes sintering of hardly sinterable silicon nitride powder is 1250 ° C. A crystal phase having a high melting point of 1300 ° C. or higher that is very stable at a high temperature up to 1300 ° C., such as RE ₂ Si ₂ O ₇ (RE is a rare earth element), Si ₂ N ₂ O, etc.) Titanium boride titanium boride solid solution expressed by Ti _1-x Zr _x B ₂ (0.02 ≦ x ≦ 0.25) having an average diameter of 1 to 10 μm in silicon nitride or sialon sintered body and silicon carbide (SiC) sintered body Particle-dispersed silicon carbide ceramics characterized in that the particles have a relative density of 99% or more dispersed in a volume fraction of 20 to 70%. By providing the lining structure consisting of scan, etc., the above objects and found that achievable. The inventors of the present invention intend to provide a divided and tapered structure as shown in FIG. 1 by improving the structure for joining the ceramic member and the metal member.

  In addition to the above, the wear-resistant and corrosion-resistant ceramics include at least one kind of known alumina, zirconia, mullite, general-purpose silicon nitride-based, general-purpose silicon carbide-based, and metal boride-based ceramic materials. In addition, a composite or laminated structure of these ceramics, and further, dispersion strengthened ceramics such as fibrous materials can be applied.

  About the taper hole provided in the ceramic member of this invention, various taper-shaped settings are possible by the ease of processing and the fixing method of an application location. For example, a through hole with a small taper angle (for example, 10/100 or less) is suitable for fixing at a lower cost. When a stronger fixing is required, a tapered structure is provided by providing a stepped structure. It is also possible to apply a taper hole structure such as a taper, a taper + a counterbore + a straight, or the like. It is possible to easily insert a stress buffer layer or a sealing material for preventing intrusion of fluid in the atmosphere into the interface between the ceramic member and the female threaded member, if necessary.

  For the material of the female threaded member, in addition to high-grade steel such as wear-resistant SKD11 and SNCM439, low-grade steel reinforced by a wear-resistant overlay sprayed layer, excellent ductility, shock mitigation at the time of collision, ceramics member Steel material that can absorb the pre-breaking deformation of ceramic materials, low thermal expansion steel that is close to the thermal expansion behavior of ceramic materials, cemented carbide, Steel having a cemented carbide or Ni—Cr sprayed layer, or ceramics, particularly ceramics that are easily machinable, which are relatively easy to machine, is suitable for each use environment. Preferably, a material having ductility equal to or greater than the elongation at break until the ceramic material is damaged is suitable for the site where the female screw is machined, and more preferably 0.2% or more.

  In addition, when used in a part that receives a thermal shock such as a high-temperature atmosphere or a high-temperature fallen object, between the female threaded portion and the ceramic member, or between the metal member for height adjustment and the ceramic member. It is also effective to insert a soft metal, heat-resistant fiber, etc. on one or both sides to reduce the load on the ceramic side due to the thermal expansion of the female thread processed portion. The female threaded portion does not need to penetrate through the surface exposed to sliding or atmosphere, and does not need to be adjusted in height to the ceramic material surface. For example, the same ceramic material as that of the exposed surface may be used depending on cost effectiveness, and it is possible to appropriately select either a through hole or a single closed hole as a shape.

In the present invention, since the metal member and the ceramic member are joined with a taper member having a female threaded portion and a bolt, for example, when applied to a lining structure for a steelmaking facility, various raw materials are unloaded from a storage tank, Ceramic plates (ceramic members) cannot be easily peeled off or dropped from steel materials (metal members) due to the impact of cutting and dropping from a belt conveyor, etc., or friction when the raw material vibrates and moves. ing. Further, there is no countersunk screw structure above the bolt head, and the ceramic plate will not come off as long as the downward convex taper insertion member processed with a female screw for fixing the ceramic plate is fixed by the bolt. As the material of the bolt, it is preferable to use a metal having a coefficient of thermal expansion of 10 × 10 ⁻⁶ / K or less or a ceramic material similar to the female screw processed portion in the case of a large thermal fluctuation.

  The actual sliding surface and the exposed surface can be counterbored on the metal member side located on the back surface side to improve adhesion and stability with the mounting member on the back surface side. In this case, in the case of a metal bolt, it is possible to efficiently suppress loosening of the bolt by welding the top of the counterbore and the head of the bolt.

  There is no need for a counterbore structure to the ceramic member that requires expensive processing to fix the countersunk screw, and the thickness of the ceramic member can be set arbitrarily, so that it is possible to set the cost according to the application. Therefore, it has the feature that the degree of freedom of cost can be expanded according to use conditions and environment.

  In addition, as shown in FIGS. 1 (a) and 1 (b), by inserting a metal layer for adjusting the thickness between the ceramic member and the metal member, the ceramic according to the application and purpose for each use environment Since the thickness of the plate can be set freely, the construction cost can be greatly reduced. When the thickness of the ceramic member is increased, the yield decreases and the cost increases, and the insertion of the adjustment metal layer is a very effective means. The material of the metal layer is preferably hard and non-ductile when subjected to high impact or sliding friction, and when it is required to have corrosion resistance to the atmosphere, it is not necessary to have high hardness, such as brazing or cold fitting. Unlike fitting methods such as shrink fitting, it is possible to select according to the application such as applying general-purpose steel materials such as SS400.

  The composite material of the present invention refers to a unit structure for fixing a ceramic material to a metal member, and solves the problems that require complex processing, high-cost bonding, and joining processes for the composite. This means a composite structure.

  An example of a specific embodiment of the present invention will be described with reference to the drawings.

  FIGS. 1 (a) and 1 (b) show two embodiments according to the present invention, and FIGS. 2 and 3 show a conventional fixing method. In the figure, 1 is a wear / corrosion resistant silicon carbide ceramics plate, 2 is a steel material (for division or height adjustment, if this steel material is not present in FIG. 1 (c), in FIG. 1 (d) (Shown when the relationship between the ceramic material and the female thread machining part is lengthened.), 3 is a tapered insertion female thread machining material (φ30, taper 8/100, M20 through female thread hole, material S45C), 4 is a bolt (SNCM439) , 5 is a base steel for construction (SS400), and 6 is an adhesive layer between the ceramic plate back groove and the steel. The size of the ceramic plate is basically 100 mm x 100 mm x 20 mm in thickness, and the unit end accompanying the staggered arrangement in use is a polygonal body with sides of 100 mm or less (usually 50 mm x 100 mm x 20 mm in thickness) as appropriate. The thickness of 20 mm was constant. Moreover, the screw size of the threaded portion was M20, which was sufficiently small with respect to the colliding sintered or coke particle size (25-50 mm) and maintained the strength when fixed. A test example of this example having the configuration of FIG. 1 is shown.

  The wear-resistant liner having the configuration of this example was used, and the service life was measured when sintered ore and coke were used as the iron-making raw material. For comparison, a liner having a structure in which the flat surfaces are simply bonded to each other with an adhesive (conventional example 1), a liner using a countersunk screw shown in FIG. 2 (conventional example 2), and Using a liner (conventional example 3) in which grooves were formed on the back surface shown in FIG. 3 and fixed with an adhesive, the useful life was measured under exactly the same conditions as in this example.

  Table 1 shows the results. As is clear from this table, this example is more than five times as compared with Conventional Example 1, and compared with Conventional Example 2 and Conventional Example 3. The service life has improved more than twice.

  As described above, in the liner of this embodiment, the wear of the recessed portion above the bolt head does not progress, the bolt head wears and there is no fear of the bolt coming off, there is no complicated processing of the back groove, and wobble As a result, the ceramic plate is hardly peeled off or dropped off.

1 is a cross-sectional view of an embodiment of a composite member according to the present invention, where (a) is a type in which a threaded hole of a tapered insertion female screw processing material is penetrated, and (b) is a single-closed taper insertion female screw processing material. (C) is a type in which a ceramic member is directly fixed to a metal member without height adjustment, (d) is an internal female screw with a taper, and the inner diameter of the metal member for height adjustment is expanded. The length of the mating surface of the material and the ceramic member is secured as much as (c), and the amount of ceramic used is reduced (ie, the cost is reduced). 10 is a conceptual cross-sectional view showing a fixing method using a countersunk screw according to Conventional Example 2. FIG. FIG. 10 is a conceptual cross-sectional view showing a method in which a groove is constructed on the back surface according to Conventional Example 3 and fixed with an adhesive.

Explanation of symbols

1… Ceramic materials
2 ... Metal parts for division or height adjustment to reduce ceramic costs
3… Tapered member with female threaded part (ceramics are acceptable)
4 ... Bolt (ceramics are acceptable)
5… Metal parts (metal equipment)
6 ... wax layer, organic or inorganic adhesive

Claims (11)

  In the fixing method in which the ceramic member and the metal member are joined with a bolt, the position of the tapered hole and the through hole is fixed when the ceramic member provided with the tapered hole narrowed on the metal member side and the metal member provided with the through hole are fixed. A ceramic member and a metal member, wherein a member having a female screw machining portion is inserted into the taper hole and a bolt is inserted from the metal member side, and the female screw machining member and the bolt are bolted. Fixing method.   2. The method for fixing a ceramic member and a metal member according to claim 1, wherein the member having the female screw processed portion has a shape that follows the shape of the tapered hole of the ceramic member.   2. The method for fixing a ceramic member and a metal member according to claim 1, wherein the female screw processed portion of the member having the female screw processed portion is a through hole penetrating the member.   2. The method for fixing a ceramic member and a metal member according to claim 1, wherein the female screw processed portion of the member having the female screw processed portion is a single-closed hole that does not penetrate the member.   The ceramic member and metal member according to any one of claims 1 to 4, wherein a material of the female threaded member is wear-resistant steel, ductile steel, low thermal expansion steel, heat-resistant steel, cemented carbide, or ceramics. Fixing method.   2. The method for fixing a ceramic member and a metal member according to claim 1, wherein the top of the bolt sinks into the metal member.   A composite member formed by combining a ceramic member and a metal member, wherein the ceramic member has a tapered hole that narrows toward the metal member side, the metal member has a through hole, and has a female screw machining portion. A composite member formed by fitting into the tapered hole and coupling the female thread processed portion and a bolt.   8. The composite member according to claim 7, wherein a shape of the female threaded member is a shape that follows the shape of the tapered hole of the ceramic member.   8. The composite member according to claim 7, wherein the female screw processed portion is a through hole.   8. The composite member according to claim 7, wherein the female screw processed portion is a single closed hole.   8. The composite member according to claim 7, wherein the composite member has a counterbore in a through hole portion on a side opposite to a joint surface with the ceramic member of the metal member.

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