JP2010194578A - Method for producing laminated heat resistant alloy plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a laminated heat resistant alloy plate which can shorten working time and can improve yield in the working. <P>SOLUTION: The method comprises a hole forming step of placing a sheet-shaped brazing member 8 on a surface of a narrow groove plate 2 formed of a heat resistant alloy and having a plurality of narrow grooves 2A arranged on the surface of the plate 2 and forming through-holes in the brazing member 8 so as to correspond to the position and the size of the narrow grooves 2A, a stacking step of stacking an upper plate formed of a heat resistant alloy on the brazing member 8, and a brazing step of brazing the narrow groove plate 2 to the upper plate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a laminated heat-resistant alloy plate.

  A combustor such as a gas turbine or a jet engine is provided with a cooling structure made of a laminated heat-resistant alloy plate. This laminated heat-resistant alloy plate has, for example, a structure in which a groove-side surface of a fine groove plate provided with a fine groove and a cooling hole and a top plate provided with only a cooling hole are brazed with nickel. (For example, refer to Patent Document 1).

  Such a laminated heat-resistant alloy plate is manufactured by joining a narrow groove plate and an upper plate made of a heat-resistant alloy via a brazing member. The brazing member used at this time is formed by mixing an acrylic resin as a binder with the brazing powder and solidifying it into a sheet.

Japanese Patent Publication No. 6-67551

  However, in the above conventional method of manufacturing a laminated heat-resistant alloy plate, the brazing member covers the entire surface of the fine groove plate, so that even if the fine groove is brazed downward, the melted braze will go into the fine groove. May fill the narrow groove. Also, the solder flows and the thickness tends to be non-uniform, and a brittle portion may be formed on the surface of the narrow groove due to diffusion of boron, which is a brazing material component. In these cases, there is a problem that processing time and cost are increased because it is necessary to perform additional processing such as removal of the wax adhering to the narrow groove or the brittle portion of the surface of the narrow groove.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for producing a laminated heat-resistant alloy plate capable of shortening the processing time and improving the yield during processing.

The present invention employs the following means in order to solve the above problems.
The method of manufacturing a laminated heat-resistant alloy plate according to the present invention includes placing a brazing member formed in a sheet shape on the surface of a fine groove plate made of a heat-resistant alloy having a plurality of fine grooves arranged on the surface, and A hole forming step of providing a through hole in the brazing member in accordance with the position and size of the groove, a laminating step of laminating an upper plate made of a heat-resistant alloy on the brazing member, and brazing the narrow groove plate and the upper plate And a brazing process.

  According to the present invention, since the through hole of the brazing member matching the position and size of the narrow groove is obtained, the brazing member can be sandwiched only at the joint surface between the narrow groove plate and the upper plate, and the amount of the brazing member is required. Can be minimized. Further, it is possible to suitably suppress the wraparound into the narrow groove when the brazing member is melted. For this reason, the trouble of removing the wax buried in the narrow groove can be saved, and the surface of the narrow groove can be prevented from becoming brittle.

  The method for manufacturing a laminated heat-resistant alloy plate according to the present invention is a method for producing the laminated heat-resistant alloy plate, wherein a part of the brazing member is cut out in a state where the brazing member is placed on the narrow groove plate. And providing the through hole.

  According to the present invention, a through hole matching the actual narrow groove shape of the narrow groove plate can be provided in the brazing member, and the amount of the brazing member can be suitably suppressed.

  Moreover, the manufacturing method of the laminated heat-resistant alloy plate according to the present invention is provided with a convex portion corresponding to the position and size of the fine groove of the fine groove plate made of a heat-resistant alloy having a plurality of fine grooves arranged on the surface. A hole forming step of providing a through hole in a brazing member formed into a sheet shape using a pressing mold, a laminating step of laminating the brazing member on the narrow groove plate, and further laminating an upper plate made of a heat-resistant alloy; And a brazing step for brazing the narrow groove plate and the upper plate.

  Also in this invention, since the through hole of the brazing member matching the position and size of the narrow groove is obtained, the brazing member can be sandwiched only on the joint surface between the narrow groove plate and the upper plate, and the amount of the brazing member can be reduced. It can be minimized. Further, it is possible to suitably suppress the wraparound into the narrow groove when the brazing member is melted. Therefore, it is possible to save the trouble of removing the wax buried in the narrow groove, and it is possible to prevent boron, which is a brazing material component, from diffusing at the bottom of the narrow groove and making the surface of the narrow groove fragile.

  Moreover, the manufacturing method of the laminated heat-resistant alloy plate according to the present invention is a manufacturing method of the laminated heat-resistant alloy plate, wherein the brazing member is formed into a sheet by mixing powdery wax and resin. Features. According to the present invention, the brazing member can be easily and accurately formed according to the size and position of the narrow groove plate and the narrow groove.

  According to the present invention, the processing time can be shortened and the yield during processing can be improved.

It is a partial fracture outline figure showing the lamination heat-resistant alloy board manufactured by the manufacturing method of the lamination heat-resistant alloy board concerning a 1st embodiment of the present invention. It is sectional drawing which shows the laminated heat-resistant alloy plate manufactured by the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the gas turbine in which the laminated heat-resistant alloy plate manufactured by the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention is used. It is a flowchart which shows the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention. It is (a) top view and (b) side view which show the narrow groove board in the hole formation process of the manufacturing method of the laminated heat-resistant-alloy board which concerns on the 1st Embodiment of this invention. It is the (a) top view and the (b) side view which show the state which mounted the brazing | wax member in the narrow groove board in the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention. It is (a) top view and (b) side view which show the state which forms a through-hole in the brazing member in the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention. It is the (A) top view which shows the state which formed the through-hole in the brazing member in the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention, (b) It is AA sectional drawing of (a). It is explanatory drawing shown about the lamination process in the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention. It is explanatory drawing shown about the lamination process in the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the state which forms a through-hole in the brazing member in the manufacturing method of the laminated heat-resistant alloy plate which concerns on the 2nd Embodiment of this invention.

(First embodiment)
A first embodiment according to the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the laminated heat-resistant alloy plate 1 produced by the method for producing a laminated heat-resistant alloy plate according to the present embodiment has a fine structure in which a plurality of fine grooves 2A and first cooling holes 2B are arranged. The groove plate 2, the second cooling hole 3 </ b> A is arranged, and the surface of the fine groove plate 2 on the fine groove 2 </ b> A side and the upper plate 3 brazed with nickel are provided.

  The narrow groove plate 2 has a thickness of about 5.0 to 10.0 mm. A plurality of narrow grooves 2A are arranged substantially in parallel on the surface of the narrow groove plate 2, and this surface functions as a cooling fin. The first cooling hole 2B and the second cooling hole 3A are arranged so as to be eccentric from each other when the upper plate 3 and the narrow groove plate 2 are brazed. The narrow groove plate 2 and the upper plate 3 are made of a nickel-based heat-resistant alloy such as Tomiloy (registered trademark) or Hastelloy (registered trademark).

The laminated heat-resistant alloy plate 1 needs to be cooled by being exposed to a high-temperature fluid such as the inner cylinder 6A, outer cylinder 6B, tail cylinder 6C of the combustor 6 included in the industrial gas turbine 5 shown in FIG. It is applied to members used in various places.
The shape of the laminated heat-resistant alloy plate 1 shown in FIG. 1 and FIG. 2 is an example, and the method for producing a laminated heat-resistant alloy plate of the present invention joins at least a fine groove plate having fine grooves and an upper plate by brazing. If it does, it can apply similarly, It can apply to the laminated alloy board of various shapes according to the use.

Next, a method for manufacturing the laminated heat-resistant alloy plate 1 according to this embodiment will be described.
As shown in FIG. 4, this manufacturing method includes a hole forming step (S11), a laminating step (S02), and a brazing step (S03) for brazing the narrow groove plate 2 and the upper plate 3. ing.

  The brazing member 8 is obtained by mixing a powder such as nickel brazing BNi-2 according to JIS standard Z 3265 with an acrylic resin as a binder at a weight ratio of approximately 10: 1 and solidifying it into a sheet. The joining surfaces of the narrow groove plate 2 and the upper plate 3 are adjusted to a predetermined surface roughness so that the molten solder is uniformly arranged.

  In the hole forming step (S11), as shown in FIG. 5, the sheet-like brazing member 8 is placed on the narrow groove plate 2 having the narrow grooves 2A disposed on the surface, as shown in FIG. Then, as shown in FIG. 7, in a state where the brazing member 8 is placed on the narrow groove plate 2, a part of the brazing member 8 is made to conform to the position and size of the narrow groove 2 </ b> A of the narrow groove plate 2. The wall is cut by a cutter X or the like as a guide, and a through hole 8A is provided as shown in FIG.

  In the stacking step (S02), as shown in FIGS. 9 and 10, the upper surface of the upper plate 3 placed substantially horizontally in the vacuum chamber C in which the upper pressing portion P1 and the lower pressing portion P2 are arranged. In addition, the fine groove plate 2 is laminated in a state where the brazing member 8 is laid and the fine groove 2A side is further down. At this time, the narrow groove plate 2 is laminated so that the narrow groove 2A of the narrow groove plate 2 and the through hole 8 of the brazing member 8 match. At this time, a combination of the upper plate 3, the brazing member 8 and the narrow groove plate 2 may be further laminated. Here, the sheet member 9 is laminated while being inserted so that the lower pressing portion P2 and the upper plate 3, the narrow groove plate 2 and the upper plate 3, and the narrow groove plate 2 and the upper pressing portion P1 are not in direct contact.

In the brazing step (S03), the upper pressing part P1 and the lower pressing part P2 apply a uniform load of 0.01 to 0.4 MPa to the narrow groove plate 2 and the upper plate 3 with a small predetermined load area. Add it in blocks. Next, the inside of the vacuum chamber C is set to an inert atmosphere or vacuum, and is heated at a temperature of 1000 to 1200 ° C. for a predetermined time. At this time, the brazing member 8 is melted and the fine groove plate 2 and the upper plate 3 are brazed at the joint surface. After the heat treatment, the laminated heat-resistant alloy plate 1 and the sheet member 9 brazed from the vacuum chamber C are taken out. The acrylic resin as the binder of the brazing member 8 is gasified as the temperature in the vacuum chamber C rises, and the gas is discharged out of the vacuum chamber C as the vacuum is achieved. Moreover, since the acrylic resin is composed of C ₁₃ H ₁₆ O ₂ and does not contain N, as represented by dicyclobenthenyl acrylate, there is an advantage that no harmful gas is generated.

  According to the method for manufacturing the laminated heat-resistant alloy plate 1, since the through hole 8A of the brazing member 8 matches the position and size of the fine groove 2A, the fine groove plate 2 and the upper plate 3 in the lamination step (S02). The brazing member 8 can be sandwiched only on the joint surface, and the amount of the brazing member 8 can be minimized. Further, it is possible to suitably suppress the wraparound into the narrow groove 2A when the brazing member 8 is melted. Therefore, it is not necessary to take measures for clogging of the narrow groove 2A, and the processing time can be shortened and the yield during processing can be improved.

  In particular, in the hole forming step (S11), in the state where the brazing member 8 is placed on the narrow groove plate 2, a part of the brazing member 8 is cut out to provide the through hole 8A. A through-hole 8A matching the shape of 2A can be provided in the brazing member 8, and the amount of the brazing member 8 can be more suitably suppressed. For this reason, the trouble of removing the wax buried in the narrow groove 2A can be saved, and the surface of the narrow groove 2A can be prevented from becoming brittle.

  Further, since the brazing member 8 is formed in a sheet shape, the brazing member 8 can be easily and accurately formed according to the size and position of the narrow groove plate 2 and the narrow groove 2A, and the thickness of the brazing member. The brazing can be made uniform and stable.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to 1st Embodiment mentioned above, and description is abbreviate | omitted.
The difference between the second embodiment and the first embodiment is that in this embodiment, in the hole forming step (S21), the convex portion 10A corresponding to the position and size of the narrow groove 2A of the narrow groove plate 2 is provided. This is the point that the through-hole 8A is provided in the brazing member 8 by using the provided pressing die 10.

  In the hole forming step (S21), the convex portion 10A of the pressing mold 10 is pressed against the brazing member 8 to form the through hole 8A in the brazing member 8. Thus, a laminated heat-resistant alloy plate is manufactured through the same lamination process (S02) and brazing process (S03) as in the first embodiment.

  According to this method for manufacturing a laminated heat-resistant alloy plate, in the hole forming step (S21), the through hole 8A of the brazing member 8 is formed in accordance with the position and size of the narrow groove 2A. As in the first embodiment, the brazing member 8 can be sandwiched only on the joint surface between the narrow groove plate 2 and the upper plate 3, and the amount of the brazing member 8 can be minimized. For this reason, the trouble of removing the wax buried in the narrow groove 2A can be saved, and the surface of the narrow groove 2A can be prevented from becoming brittle.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the first embodiment, a part of the brazing member is cut out with a cutter to provide a through hole. However, the present invention is not limited to this, and the through hole may be formed by die cutting on a narrow groove plate. . In addition, the brazing member is formed to include a resin, but the present invention is not limited to this, and the brazing member may not include the resin as long as it is a sheet.

DESCRIPTION OF SYMBOLS 1 Laminated heat-resistant alloy plate 2 Narrow groove plate 2A Narrow groove 3 Upper plate 8 Brazing member 8A Through-hole 10 Pressing die 10A Convex part

Claims (4)

A brazing member formed in a sheet shape is placed on the surface of a narrow groove plate made of a heat resistant alloy having a plurality of narrow grooves arranged on the surface, and the brazing member is adjusted to the position and size of the narrow groove. A hole forming step of providing a through hole;
A laminating step of laminating an upper plate made of a heat-resistant alloy on the brazing member;
Brazing step of brazing the narrow groove plate and the upper plate;
A method for producing a laminated heat-resistant alloy plate, comprising:   2. The method for manufacturing a laminated heat-resistant alloy plate according to claim 1, wherein a part of the brazing member is cut out and the through hole is provided in a state where the brazing member is placed on the narrow groove plate. Using a pressing die provided with protrusions corresponding to the position and size of the narrow groove of a narrow groove plate made of a heat-resistant alloy having a plurality of narrow grooves arranged on the surface, penetrates the brazing member formed in a sheet shape A hole forming step of providing a hole;
Laminating step of laminating the brazing member on the narrow groove plate, and further laminating an upper plate made of a heat-resistant alloy,
Brazing step of brazing the narrow groove plate and the upper plate;
A method for producing a laminated heat-resistant alloy plate, comprising:   The method for producing a laminated heat-resistant alloy plate according to any one of claims 1 to 3, wherein the brazing member is formed into a sheet by mixing powdery wax and resin.

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