JP2011252440A - Method of estimating temperature of honeycomb member and honeycomb member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately estimate a temperature even during short-time operation or when the temperature is relatively low, while allowing impact to be applied to a honeycomb member.SOLUTION: The temperature estimating method comprises: a manufacturing process S11 of manufacturing the honeycomb member by incorporating a measured member formed of a second alloy, which changes a metallic state by heating as compared with a first alloy, into a honeycomb member body formed of the first alloy; a heating process S12 of heating the honeycomb member under a use environment; a metallic state parameter acquiring process S13 of determining a metallic state parameter indicating a change in metallic state by measuring the metallic state of the measured member among the heated honeycomb member; and a temperature estimating process S14 of estimating the use environment temperature by substituting the metallic state parameter determined in the metallic state parameter acquiring process S13 and known heating time in the heating process S12 in a relational expression of the predetermined heating temperature to the second alloy, heating time and the metallic state parameter.

Description

  The present invention relates to a temperature estimation method for a honeycomb member and a honeycomb member.

  As is well known, in a turbine in which a rotor is rotated by the energy of combustion gas among gas turbines, a stationary blade row in which stationary blades are arranged in a circumferential direction in a casing inner peripheral portion, and a moving blade in a circumferential direction in a rotor outer peripheral portion An annular flow path in which the moving blade rows arranged in a row are arranged alternately in the axial direction is configured. The combustion gas passes through the stationary blade row and the moving blade row in order, so that the working fluid passing through the moving blade row gives a rotational force to the rotor.

  In such a gas turbine, for example, a tip shroud extending in the circumferential direction at the tip of each rotor blade is provided so that the working fluid does not leak other than the annular flow path in which the rotor blade row and the stationary blade row are disposed. There is one in which a honeycomb member is disposed in a portion of the casing facing the chip shroud so as to seal a gap with the casing (Patent Document 1 below). Further, there is a honeycomb member disposed so as to seal a gap between a stationary blade shroud extending in the circumferential direction at each stationary blade tip and a moving blade platform extending in the circumferential direction on the proximal end side of each moving blade ( Patent Document 2) below.

Japanese Patent Laid-Open No. 11-13404 JP 2006-77658 A

  By the way, in order to improve the sealing performance when the honeycomb member as described above is used, the operating environment temperature of the honeycomb member used in the actual machine is accurately grasped, and feedback is made to each dimension value and material selection. It becomes important.

  However, when the thermocouple is disposed on the honeycomb member and the temperature is measured, there is a problem that the thermocouple is damaged due to the impact of contact when the blade platform or the chip shroud unexpectedly contacts the honeycomb member.

  In addition, it is conceivable to estimate the temperature using a temperature estimation formula (for example, JP 2009-264204 A, JP 3935692 A) based on a change in the material (metal composition or metal structure) of the honeycomb member. For such honeycomb members, it is normal to use an alloy that hardly changes in material in a high-temperature environment. There is a problem that it is difficult to estimate.

  The present invention has been made in consideration of such circumstances, and allows an impact applied to the honeycomb member and accurately estimates the temperature even when the operation is performed for a short time or when the temperature is relatively low. Let it be an issue.

In order to achieve the above object, the present invention employs the following means.
That is, the honeycomb member temperature estimation method according to the present invention is a honeycomb member temperature estimation method for estimating a use environment temperature of a honeycomb member composed of an assembly of hollow polygonal columnar cells, and is formed of the first alloy. A manufacturing process for manufacturing a honeycomb member by incorporating a member to be measured formed of a second alloy whose metal state changes by heating as compared with the first alloy into the honeycomb member body, and the honeycomb member in an environment in which the honeycomb member is used A heating process to be provided and heated, a metal condition parameter obtaining process for measuring a metal condition of the member to be measured among the heated honeycomb members and obtaining a metal condition parameter indicating the change in the metal condition, and obtaining in advance In the metal state parameter obtaining step, the relational expression between the heating temperature and the heating time for the second alloy obtained and the metal state parameter A temperature estimation step of estimating the known heating time by substituting a with ambient temperature in the meta metallic state parameter and the target heating step, characterized by having a.
According to this configuration, since the member to be measured formed of the second alloy whose metal state changes by heating is measured as compared to the first alloy forming the honeycomb member body, the metal state of the first alloy is less likely to change. However, the use environment temperature can be estimated from the metal state of the member to be measured. Thereby, even if it is a case where it is a short time driving | running or a use environment temperature is comparatively low, a use environment temperature can be estimated correctly based on the change of the metal state of a 2nd alloy.
Further, since the use environment temperature is estimated from the metal state parameter of the member to be measured using the relational expression, the use environment temperature of the honeycomb member can be grasped while allowing an impact applied to the honeycomb member.

The manufacturing step is characterized in that the honeycomb member is manufactured such that the member to be measured has the same size as the honeycomb member main body in the cell height direction in which the central axis of the cell extends. To do.
According to this configuration, it is possible to easily grasp the use environment temperature of the portion to which the impact is applied from the change in the metal state of the portion to which the impact is applied.

Further, the second alloy has a specific content element that decreases by heating, the metal state parameter is a decrease amount of the concentration of the specific content element, and the relational expression is the following relational expression (1): It is characterized by being.
T = −b ₁ / ln {(C / (a ₁ · t)} (1)
Here, t is the use environment temperature, T is the heating time, C is the amount of decrease in the concentration of the specific element contained in the second alloy, and a ₁ and b ₁ are intrinsic constants depending on the material type of the second alloy.
According to this configuration, since the usage environment temperature of the honeycomb member is estimated from the amount of decrease in the concentration of the specific content element, various alloys can be used as the second alloy.

In addition, the second alloy has a specific content element that decreases by heating, the metal state parameter is a change amount of pore density accompanying a decrease in the specific content element, and the relational expression is as follows: It is a relational expression (2).
T = −b ₂ / ln {(H / (a ₂ · t)} (2)
However, t is the ambient temperature, T is the heating time, H is the variation of the pore density of the second alloy, a _{2 ·} b 2 is a specific constant dependent material species of the second alloy.
According to this configuration, since the use environment temperature of the honeycomb member is estimated from the amount of change in the pore density accompanying the decrease in the specific content element, various alloys can be used as the second alloy.

  The second alloy has at least one of aluminum, nickel, iron, chromium and titanium as the specific element.

Further, the second alloy has aluminum and nickel as contained elements and a gamma prime phase is formed, and the metal state parameter is a value that is the cube of the particle size of the gamma prime phase that is increased by heating. And the value that is the cube of the particle size of the gamma prime phase before heating, and the relational expression is the following relational expression (3).
r ₁ ³ −r ₀ ³ = c · exp (−d / T) · t (3)
Where t is the ambient temperature, T is the heating time, r ₁ is the particle size of the gamma prime phase after heating, r ₀ is the particle size of the gamma prime phase before heating, and c and d are the materials of the second alloy An intrinsic constant by species.

Further, the honeycomb member according to the present invention is a honeycomb member composed of an aggregate of hollow polygonal columnar cells, the honeycomb member main body formed of a first alloy, provided on the honeycomb member main body, And a member to be measured formed of a second alloy whose metal state changes by heating as compared to the alloy.
According to this configuration, by using the temperature estimation formula, the impact applied to the honeycomb member is allowed, and the temperature can be accurately estimated even when the operation is performed for a short time or when the temperature is relatively low.

The honeycomb member body includes a flat plate portion formed in a flat plate shape, and a corrugated plate having a plurality of protruding portions that protrude from the flat plate portion to one side in the normal direction and extend in the same direction at intervals from each other. Are stacked, and one of the two corrugated plates adjacent to each other in the stacking direction is in contact with the other flat plate portion, and the members to be measured are mutually connected in the stacking direction. Is provided between two corrugated plates adjacent to each other.
According to this configuration, since the member to be measured is provided between two corrugated plates adjacent to each other in the stacking direction, the member to be measured can be incorporated into the honeycomb member body with a relatively simple configuration. In addition, it is possible to grasp not only the internal space of the cell but also the use environment temperature of the contact portion of the corrugated plate.

The honeycomb member main body includes a flat plate portion formed in a flat plate shape and a plurality of corrugated plates each having a plurality of protrusion portions protruding in the normal direction from the flat plate portion and extending in the same direction at intervals from each other. One of the two corrugated plates that are stacked and adjacent to each other in the stacking direction is configured to abut against the other flat plate portion, and the member to be measured is formed in the same shape as the corrugated plate A flat plate portion to be measured, and a plurality of measured protrusion portions that protrude from the measured flat plate portion to one side in the normal direction and extend in the same direction at intervals from each other, The plate portion to be measured provided between the two corrugated plates is joined to the protruding portion of the corrugated plate on the other side in the normal direction, and the flat plate of the corrugated plate on the one side in the normal direction. It is characterized by being joined to the part That.
According to this configuration, since the corrugated plate and the member to be measured are laminated to form the honeycomb member, it is possible to grasp not only the internal space of the cell but also the use environment temperature of the contact portion of the corrugated plate. Become.
Furthermore, the shape of the cell does not change, and the influence on the crushing performance of the honeycomb member by incorporating the member to be measured can be reduced.

Further, the member to be measured is formed so that a dimension in a cell height direction in which a central axis of the cell extends is substantially the same as that of the honeycomb member main body.
According to this structure, the use environment temperature of the site | part to which the said impact is added can be easily grasped | ascertained from the decreasing amount of the density | concentration of the specific containing element of the site | part to which an impact is applied.

  According to the temperature estimation method for a honeycomb member according to the present invention, an impact applied to the honeycomb member is allowed, and the temperature can be accurately estimated even when the operation is performed for a short time or when the temperature is relatively low.

  Further, according to the honeycomb member of the present invention, by using the temperature estimation formula, an impact applied to the honeycomb member is allowed, and the temperature is accurately controlled even in a short time operation or when the temperature is relatively low. I can estimate.

1 is a diagram showing a schematic overall configuration of a gas turbine 1 according to an embodiment of the present invention, and is a half sectional view of the gas turbine 1. It is an expanded sectional view of the principal part I of the turbine 4 which concerns on embodiment of this invention. 1 is a schematic configuration perspective view of a honeycomb member 30 according to an embodiment of the present invention. FIG. 4 is an enlarged view of a main part of the honeycomb member 30 according to the embodiment of the present invention, and is a view taken along arrow II in FIG. 3. It is a flowchart of the temperature estimation method M1 of the honeycomb member which concerns on embodiment of this invention. It is a flowchart of the temperature estimation method M2 of the honeycomb member which concerns on embodiment of this invention. It is a figure showing a modification of honeycomb member 30 concerning an embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the use environment temperature of the honeycomb member used in the gas turbine is estimated. In the following, the structure of the gas turbine and the honeycomb member will be described in order, and then the temperature estimation method for the honeycomb member will be described.
(gas turbine)
FIG. 1 is a diagram showing a schematic overall configuration of a gas turbine 1 according to an embodiment of the present invention, and is a half sectional view of the gas turbine 1.
As shown in FIG. 1, the gas turbine 1 includes a compressor 2, a plurality of combustors 3, and a turbine 4. The compressor 2 takes in air as a working fluid from an air intake and generates compressed air. Each of the plurality of combustors 3 is connected to the compressor 2 and injects fuel into the compressed air supplied from the compressor 2 to burn it, thereby generating high-temperature and high-pressure combustion gas. The turbine 4 converts the thermal energy of the combustion gas sent out from the combustor 3 into rotational energy of the rotor 6 to generate a driving force. This driving force is transmitted to a generator (not shown) connected to the rotor 6.

FIG. 2 is an enlarged cross-sectional view of a main part I of the turbine 4.
The turbine 4 includes a turbine casing 5 that partitions the outside and the inside of the turbine 4, a rotor 6 that passes through the turbine casing 5, a plurality of stationary blade rows 7 that are alternately arranged in the axial direction in the turbine casing 5, and And a plurality of blade rows 10.

  The rotor 6 is rotatably supported while being inserted through the turbine 4, and has rotor disks 6 </ b> A to 6 </ b> D each formed in a disk shape and stacked in the axial direction.

  Each stationary blade row 7 is configured by arranging a plurality of stationary blades 8 in the circumferential direction in the inner peripheral portion of the turbine casing 5. The stationary blades 8 in each stationary blade row 7 extend from the turbine casing 5 side toward the rotor 6 side, and each tip on the rotor 6 side is connected by a stationary blade split ring 9 extending in the circumferential direction.

  Each rotor blade row 10 is configured by arranging a plurality of rotor blades 11 in the circumferential direction at each outer peripheral portion of the rotor disks 6A to 6D. Each rotor blade 11 in the rotor blade row 10 extends from the rotor 6 side toward the turbine casing 5 side. The rotor blade platform 12 extends in the circumferential direction to the proximal end on the rotor 6 side, and the distal end on the turbine casing 5 side. A tip shroud 13 extending in the circumferential direction is provided. In each moving blade row 10, the moving blade platform 12 and the tip shroud 13 of the moving blade 11 are continuous in an annular shape as a whole.

  As shown in FIG. 2, the turbine 4 having the above configuration includes a plurality of annularly continuous tip shrouds 13 and a radial gap between the turbine casing 5 side, and a stationary blade split ring 9 that is overlapped in the axial direction of the rotor 6. And a honeycomb member 30 provided in the radial gap between the end of the rotor blade platform 12 and the end of the rotor blade platform 12 and the radial gap between the tip of the stationary blade split ring 9 and the rotor disks (6A to 6D). is doing.

(Honeycomb member)
3 is a schematic configuration perspective view of the honeycomb member 30, and FIG. 4 is a view taken along the arrow II in FIG.
As shown in FIG. 3, the honeycomb member 30 is composed of an aggregate of hollow hexagonal columnar cells.
The honeycomb member 30 seals the radial gaps to prevent combustion gas leakage.

  As shown in FIG. 4, the honeycomb member 30 includes a honeycomb member main body 31 formed of a first alloy (first alloy) A1, and is incorporated in the honeycomb member main body 31, and is heated by heating compared to the first alloy A1. A member to be measured 35 formed of a second alloy (second alloy) A2 whose metal state changes. In addition, a metal state means the density | concentration of a specific content element, a void density, and the particle size of a gamma prime phase (all are mentioned later).

As shown in FIG. 4, the honeycomb member main body 31 is configured by laminating corrugated plates 32 in a normal direction (more specifically, a plate surface normal direction in the flat plate portion 32a).
The corrugated plate 32 has a flat plate portion 32a formed in a flat plate shape, and a plurality of protruding portions 32b that protrude from the flat plate portion 32a to one side in the normal direction and extend in the same direction at intervals from each other. ing. In the following, as shown in FIGS. 3 and 4, the direction in which the central axis of the cell of the honeycomb member 30 extends intersects the cell height direction and the cell height direction and the normal direction, respectively. Is called the array direction.

The protruding portion 32b is formed in an isosceles trapezoidal shape, and the arrangement direction of the portion corresponding to the upper side (short side) is the same as the dimension of the flat plate portion 32a.
With such a configuration, in the corrugated plate 32, a trapezoidal space that is partitioned by the protruding portion 32b and that is open on the other side in the normal direction, and the flat plate portion 32a and the two protruding portions 32b that sandwich the flat plate portion 32a. The trapezoidal spaces that are partitioned and open on one side in the normal direction are alternately continued in one direction (arrangement direction).
The corrugated plate 32 is formed of the first alloy A1, and the first alloy A1 will be described in detail later together with the second alloy A2.

  The honeycomb member main body 31 is formed by laminating a plurality of corrugated plates 32 each having a normal direction in the same direction, and a protrusion on the other side in the normal direction of two corrugated plates 32 adjacent to each other in the stacking direction. 32b is in contact with the flat plate part 32a on one side in the normal direction, and this contact part is joined by brazing. With such a configuration, two trapezoidal spaces adjacent in the stacking direction are combined to form a hexagonal columnar space for each cell.

  The member to be measured 35 is a flat plate member formed of the second alloy A2, and the dimension in the cell height direction is substantially the same as each corrugated plate 32. The member to be measured 35 is sandwiched between two corrugated plates 32 among the plural corrugated plates 32, and is joined to one projecting portion 32b and the other flat plate portion 32a of the two corrugated plates 32. This bisects the hexagonal column space.

(Temperature Estimation Method for Honeycomb Member, First Embodiment)
Next, the honeycomb member temperature estimation method M1 according to the first embodiment of the present invention will be described mainly with reference to FIG.
As described above, the honeycomb member 30 includes the honeycomb member main body 31 in which the corrugated plates 32 formed of the first alloy A1 are stacked, and the member to be measured 35 formed of the second alloy A2. The honeycomb member temperature estimation method M1 uses the second alloy A2 that is easier to oxidize than the first alloy A1 instead of the first alloy A1 having excellent oxidation resistance, and the specific specific contained element that changes due to this oxidation. The ambient temperature is estimated by using the decrease in the concentration of the product.
That is, in the second alloy A2, an oxide film is more easily formed on the alloy surface than the first alloy A1 under the same use environment temperature. For this reason, compared with 1st alloy A1, the reduction amount of the specific content element which forms an oxide film increases. Here, examples of the specific element include aluminum, nickel, iron, chromium, and titanium.
Specific examples of combinations of the first alloy A1 and the second alloy A2 are shown in Table 1 below.

  In addition, the metal composition of each of the above alloys is as shown in Table 2 below. In Table 2, “Remaining” indicates “remaining ratio”, and corresponds to a value obtained by subtracting the total value of the ratios of other contained elements from the whole.

  In Tables 1 and 2, “Haynes 214”, “Haynes 230”, and “Hastelloy X” are registered trademarks of Haynes. “S45C”, “NiCu30”, and “TAP6400” are alloys defined by JIS standards.

As shown in Table 2, some of the second alloy A2 contains a plurality of specific contained elements, but there is a difference in the amount of reduction of each specific contained element. More specifically, when using Hastelloy X as the second alloy A2, at least one of aluminum and chromium when using Haynes 230, nickel when using NW4402, titanium and aluminum when using TAPG6400. At least one of the above has a reduced amount of concentration more than the other specific contained elements. That is, when the alloy illustrated in Table 2 is used as the second alloy A2, the use environment temperature is estimated more accurately by using the above-described specific containing element whose concentration is reduced as compared with other specific containing elements. Is possible. Note that iron may be used when S45C is used.
Further, for an alloy containing a plurality of specific contained elements, the temperature can be estimated in a superimposed manner using the amount of decrease in the concentration of each specific contained element. For example, in the case of using Hastelloy X, it is possible to estimate the temperature using the respective decrease amounts of chromium and nickel.

In estimating the use environment temperature of the honeycomb member 30 by using the temperature estimation method M1, a relational expression between the heating temperature, the heating time, and the amount of decrease in the concentration of the specific content element for the second alloy A2 is obtained in advance. .
More specifically, after performing a heating test on the test material of the second alloy A2 in advance and measuring the concentration of the specific content element used for estimating the use environment temperature from the heated test material, the specific content The concentration reduction amount of the element is obtained, and the relationship between the obtained concentration reduction amount, the heating time in the heating test, and the heating temperature is identified as the following relational expression (1).
T = −b ₁ / ln {(C / (a ₁ · t)} (1)
However, t is the use environment temperature, T is the heating time, C is the amount of decrease in the concentration of the specific element, and a ₁ and b ₁ are eigen constants depending on the material type of the second alloy A2.
This relational expression (1) is described in Japanese Patent Application Laid-Open No. 2009-264204.

Next, an actual procedure of the honeycomb member temperature estimation method M1 will be described.
FIG. 5 is a flowchart of the honeycomb member temperature estimation method M1. As shown in FIG. 5, the honeycomb member temperature estimation method M1 includes a manufacturing process S11, a heated process S12, a specific element concentration reduction amount acquisition process (metal state parameter acquisition process) S13, and a temperature estimation process S14. have.

First, the honeycomb member 30 having the above-described configuration is manufactured (manufacturing step S11).
For example, the corrugated plates 32 are stacked, one projecting portion 32b of the two corrugated plates 32 adjacent to each other is butted against the other flat plate portion 32a, and the butted portion is temporarily fixed by spot welding or the like. On the other hand, the two corrugated plates 32 sandwiching the member to be measured 35 are temporarily fixed in a state where the member to be measured 35 is sandwiched between the protruding portion 32b of one corrugated plate 32 and the flat plate portion 32a of the other corrugated plate 32. And the honeycomb member 30 can be obtained by brazing each temporarily fixed part.
It is also possible to obtain the honeycomb member 30 by inserting the member to be measured 35 and brazing the member to be measured 35 to the corrugated plate 32 after the honeycomb member bodies 31 are laminated and temporarily fixed.

Next, the honeycomb member 30 obtained in the manufacturing process S11 is disposed in the turbine 4 to drive the gas turbine 1, and the honeycomb member 30 is heated (heated process S12). More specifically, the radial gaps between the plurality of annular chip shrouds 13 and the turbine casing 5 side, and the ends of the stationary blade split ring 9 and the blade platform overlapped in the axial direction of the rotor 6 are arranged. The honeycomb member 30 is continuously arranged in the circumferential direction in the radial gap with the 12 end portions.
The honeycomb member 30 is disposed such that the height direction of the honeycomb member is directed to the radial direction of the rotor 6.

When the honeycomb member 30 is heated by being exposed to a high temperature environment, the specific content element contained in the member to be measured 35 is decreased more than the specific content element contained in the honeycomb member body 31. Specifically, an oxide film of a specific content element is formed on the surface of the member 35 to be measured, and the specific content element in the alloy decreases accordingly.
At this time, when the rotor blade 11 is displaced due to thermal expansion of the rotor 6 or the like, the honeycomb member 30 (the corrugated plate 32 and the member to be measured 35) is moved by the tip shroud 13, the rotor blade platform 12 or the rotor disks 6A to 6D of the rotating rotor blade 11. ) Is cut or crushed.

Next, the concentration of the specific element contained in the member to be measured 35 in the heated honeycomb member 30 is measured, and the measured concentration of the specific element after heating is subtracted from the pre-measured concentration of the specific element contained before heating. Then, a decrease amount of the concentration of the specific content element is obtained (specific content element concentration decrease amount acquisition step S13).
At this time, the concentration of the specific element can be measured using, for example, an electron probe microanalyzer (EPMA).
This EPMA irradiates a substance with an accelerated electron beam (excitation by an electron beam), paying attention to the spectrum of characteristic X-rays, and the ratio of constituent elements in a minute region (approximately 1 μm 3) irradiated with the electron beam Analyzing (concentration), a solid sample is analyzed almost non-destructively. In addition, it can also measure simply using the energy dispersive X-ray-analysis apparatus (Energy Dispersive Spectroscopy) used attached to a scanning electron microscope (Scanning Electron Microscope, SEM).

  In the measurement of the concentration of the specific element, first, the member to be measured 35 is cut in the cell height direction (see FIG. 4), and near the surface layer (the base layer near the oxide film formed on both surfaces of the member to be measured 35). ) And the concentration of a specific content element at a total of three points in the center of the base layer, and an average value (average concentration) is preferably obtained. That is, the concentration of the specific content element often varies between the vicinity of the surface layer and the central portion of the base layer, but the specific content element is measured at a plurality of locations in the thickness direction of the member to be measured 35 and the average value is obtained. Makes it possible to estimate temperature more accurately.

  Next, the specific content obtained in the specific content element concentration reduction amount acquisition step S13 in the relational expression (1) of the heating temperature, the heating time, and the specific content element reduction amount obtained in advance for the second alloy A2. The use environment temperature (t) is estimated by substituting the decrease amount (C) of the element concentration and the known heating time (T) (temperature estimation step S14).

  As described above, according to the temperature estimation method M1, the member to be measured 35 formed of the second alloy A2 in which the concentration of the specific containing element is reduced by heating compared to the first alloy A1 forming the honeycomb member body 31. Therefore, even if the honeycomb member body 31 is formed of an alloy having excellent oxidation resistance and the concentration of the specific contained element is difficult to decrease, the use environment temperature is estimated from the concentration of the specific contained element of the member to be measured 35. Can do. Thereby, even if it is a short-time driving | running or a case where use environment temperature is comparatively low, use environment temperature can be estimated correctly based on the amount of density | concentration reduction | decrease of the specific content element of the to-be-measured member 35.

  Even if the rotor blade platform 12 and the chip shroud 13 unexpectedly contact the honeycomb member 30, the use environment temperature is estimated using the relational expression (1) from the amount of decrease in the concentration of the specific element contained in the member to be measured 35. It is possible. Thereby, it is possible to grasp the use environment temperature of the honeycomb member 30 while allowing the impact applied to the honeycomb member 30.

  Furthermore, since the member to be measured 35 has the same size as the honeycomb member main body 31 in the height direction of the honeycomb member 30, the honeycomb member 30 can be applied to a portion that is difficult to measure with a thermocouple. It is possible to accurately grasp the operating environment temperature. That is, a portion of the honeycomb member 30 that is close to the rotor 6 side (the rotor blade platform 12, the tip shroud 13, and the rotor disks 6A to 6D) is easily in contact with the rotor 6 side, and thus is difficult to measure using a thermocouple. It is. However, since the use environment temperature can be estimated from the member to be measured 35 after the contact, the use environment of the part close to the rotor 6 side is determined from the decrease in the concentration of the specific element contained in the part close to the rotor 6 side. The temperature can be easily grasped.

  Further, by continuously measuring a plurality of portions of the member 35 to be measured, it is possible to easily grasp the distribution of the use environment temperature. That is, a large number of thermocouples are required to obtain the distribution of the ambient temperature using the thermocouple, but according to the temperature estimation method M1, it is easy to simply measure a plurality of measured members 35 continuously. A temperature distribution can be obtained.

  In addition, the use environment temperature of the abutting portion of the corrugated plate 32 is grasped by obtaining the amount of decrease in the concentration of the specific element contained in the abutting portion (brazing portion) of the corrugated plate 32 as well as the internal space of the cell. It becomes possible.

In the temperature estimation method M1 described above, the amount of decrease in the concentration of the specific content element is used. However, the amount of change in the void density in the second alloy A2 due to the decrease in the specific content element (metal state parameter). It may be.
In other words, as described above, an oxide layer is formed on the surface of an alloy having a specific content element, but voids are generated by the metal consumed in forming the oxide layer. In this case, the temperature can be estimated by using the following relational expression (2).
T = −b ₂ / ln {(H / (a ₂ · t)} (2)
Here, t is the ambient temperature, T is the heating time, H is the amount of change in the pore density, and a ₂ · b ₂ is an intrinsic constant depending on the material type of the second alloy A2. In addition, this relational expression (2) is described in JP 2009-264204 A, etc., and a heat test is performed on the test material of the second alloy A2 in advance, and the test material after heating is used. After measuring the hole density used to estimate the environmental temperature, obtain the amount of change in the hole density from the hole density before heating and the measured hole density, and the amount of change and the heating time and heating in the heating test. The relationship with temperature is identified as a relational expression.

(Temperature Estimation Method for Honeycomb Member, Second Embodiment)
Next, the honeycomb member temperature estimation method M2 according to the second embodiment of the present invention will be described. In addition, about the component similar to 1st embodiment mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

This honeycomb member temperature estimation method M2 can be applied when the second alloy A2 has aluminum and nickel as contained elements and a gamma prime phase (Ni ₃ Al, γ ′ phase) is formed. is there.
That is, in the alloys illustrated in Table 2, the honeycomb member temperature estimation method M2 can be applied when “Haynes 230” is used for the second alloy A2. As shown in Table 1, “Haynes 214” can be used as the first alloy A1 corresponding to the second alloy A2.

The temperature estimation method M2 of the honeycomb member uses the second alloy A2 that is more easily oxidized than the first alloy A1, and changes the particle size of the γ ′ phase that changes due to this oxidation (more specifically, the gamma after heating). The <r ₁ ³ −r ₀ ³ > value), which is the difference between the prime phase particle size r ₁ cubed r ₁ ³ and the gamma prime phase particle size r ₀ cubed r ₀ ³ before heating, is used. In this way, the operating environment temperature is estimated.

Further, when estimating the operating environment temperature of the honeycomb member 30 using the temperature estimation method M2, a relational expression between the heating temperature and the heating time for the second alloy A2 and the <r ₁ ³ −r ₀ ³ > value is obtained in advance. Keep it.
More specifically, a heat test is performed on the specimen of the second alloy A2 in advance, and after measuring the particle diameter (r ₁ ) of the γ ′ phase after heating, the particle diameter of the γ ′ phase before heating is measured. Based on (r ₀ ), the <r ₁ ³ -r ₀ ³ > value is obtained, and the relationship between the obtained <r ₁ ³ -r ₀ ³ > value, the heating time and the heating temperature in the heating test is expressed by a relational expression (3 ).
r ₁ ³ −r ₀ ³ = c · exp (−d / T) · t (3)
Where t is the ambient temperature, T is the heating time, r ₁ is the particle size of the γ ′ phase after heating, r ₀ is the particle size of the γ ′ phase before heating, and cd is the material type of the second alloy A2. Is an intrinsic constant.
This relational expression (3) is described in Japanese Patent No. 3935692.

Next, the actual procedure of the honeycomb member temperature estimation method M2 will be described.
FIG. 6 is a flowchart of the honeycomb member temperature estimation method M2. As shown in FIG. 6, the honeycomb member temperature estimation method M <b> 2 includes a manufacturing process S <b> 11, a heated process S <b> 12, a <r ₁ ³ −r ₀ ³ > value acquisition process (metal state parameter acquisition process) S <b> 23, a temperature. And an estimation step S24.

First, the honeycomb member 30 having the above-described configuration is manufactured (manufacturing step S11).
Next, the honeycomb member 30 obtained in the manufacturing process S11 is disposed in the turbine 4 to drive the gas turbine 1, and the honeycomb member 30 is heated (heated process S12). When the honeycomb member 30 is heated by being exposed to a high temperature environment, the particle diameter of the γ ′ phase of the member to be measured 35 increases (r ₀ → r ₁ ).

Next, the particle diameter of the γ ′ phase of the member to be measured 35 in the honeycomb member 30 after heating is measured, and the measured γ ′ phase is calculated from the value obtained by cubed the particle diameter of the γ ′ phase before heating measured in advance. The value obtained by subtracting the cubed value of the particle diameter is obtained as a <r ₁ ³ -r ₀ ³ > value (<r ₁ ³ -r ₀ ³ > value acquisition step S23).
At this time, the particle diameter (average particle diameter) of the γ ′ phase can be measured by, for example, observing with a scanning electron microscope (SEM) and image processing.

Next, the relational expression (3) between the heating temperature and heating time for the second alloy A2 determined in advance and the <r ₁ ³ −r ₀ ³ > value is set to <r ₁ ³ −r ₀ ³ > value acquisition step S23. Substituting the <r ₁ ³ -r ₀ ³ > value obtained in step ₁ and the known heating time (T), the use environment temperature (t) is estimated (temperature estimation step S24).

  As described above, the honeycomb member temperature estimation method M2 can achieve the same effect as the honeycomb member temperature estimation method M1.

Note that the operation procedure shown in the above-described embodiment, various shapes and combinations of the constituent members, and the like are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.
For example, in the embodiment described above, the member to be measured 35 is formed in a flat plate shape and sandwiched between the two corrugated plates 32, but the member to be measured 36 having the same configuration as the corrugated plate is the same as the corrugated plate 32. May be laminated.
That is, as shown in FIG. 7, the measured flat plate portion 36a is formed in the same shape as the corrugated plate 32, and protrudes from the measured flat plate portion 36a to one side in the normal direction and is spaced from each other. The measured member 36 having a plurality of measured projecting portions 36b extending in the same direction is provided between the two corrugated plates 32, and the measured flat plate portion 36a is the corrugated plate 32 on the other side in the normal direction (see FIG. 7 may be joined to the flat plate portion 32a of the corrugated plate 32 on one side in the normal direction (32B in FIG. 7).

Thus, by making the corrugated plate 32 and the member to be measured 36 the same shape, the honeycomb member 30 can be easily manufactured, and the crushing performance of the honeycomb member 30 by incorporating the member to be measured 36 can be improved. The influence of can be reduced. Further, it becomes possible to grasp not only the internal space of the cell but also the use environment temperature of the contact portion (brazing portion) of the corrugated plate 32.
Alternatively, a configuration in which a piece-like member to be measured is simply provided in the internal space of the cell may be employed.

In the embodiment described above, the honeycomb member 30 is a hexagonal column-shaped cell, but may be a polygonal column-shaped cell other than the hexagonal column-shaped cell.
In the above-described embodiment, the present invention is applied to the honeycomb member used in the gas turbine. However, it is possible to satisfactorily estimate the use environment temperature of the honeycomb member used in another fluid machine. is there.

DESCRIPTION OF SYMBOLS 30 ... Honeycomb member 31 ... Honeycomb member main body 32 (32A, 32B) ... Corrugated plate 32a ... Flat plate part 32b ... Projection part 35, 36 ... Measured member 36a ... Measured flat plate part 36b ... Measured projection part A1 ... 1st alloy (First alloy)
A2 ... Second alloy (second alloy)
M1, M2 ... temperature estimation method S11 ... production process S12 ... heated process S13 ... specific element concentration reduction amount acquisition step (metal state parameter acquisition step)
S23 ... <r ₁ ³ -r ₀ ³ > value acquisition step (metal state parameter acquisition step)
S14, S24 ... temperature estimation step

Claims (10)

A method for estimating a temperature of a honeycomb member for estimating a use environment temperature of the honeycomb member composed of an aggregate of hollow polygonal cells,
A manufacturing process for manufacturing a honeycomb member by incorporating a member to be measured formed of a second alloy whose metal state changes by heating as compared with the first alloy into a honeycomb member body formed of the first alloy. ,
A heated process in which the honeycomb member is provided and heated in a use environment; and
A metal state parameter obtaining step for obtaining a metal state parameter indicating a change in the metal state by measuring a metal state of the member to be measured among the honeycomb members after heating;
In the relational expression of the heating temperature and heating time for the second alloy obtained in advance and the metal state parameter, the metal state parameter obtained in the metal state parameter obtaining step and the known heating time in the heated step are A temperature estimation step for substituting and estimating the operating environment temperature;
A method for estimating the temperature of a honeycomb member, comprising:   The manufacturing step is characterized in that the honeycomb member is manufactured such that the member to be measured has the same size as the honeycomb member main body in a cell height direction in which a central axis of the cell extends. Item 2. A method for estimating the temperature of a honeycomb member according to Item 1. The second alloy has a specific element that decreases by heating,
The metal state parameter is a decrease amount of the concentration of the specific contained element,
The said relational expression is the following relational expression (1), The temperature estimation method of the honeycomb member of Claim 1 or 2 characterized by the above-mentioned.
T = −b ₁ / ln {(C / (a ₁ · t)} (1)
Here, t is the use environment temperature, T is the heating time, C is the amount of decrease in the concentration of the specific element contained in the second alloy, and a ₁ and b ₁ are intrinsic constants depending on the material type of the second alloy. The second alloy has a specific element that decreases by heating,
The metal state parameter is an amount of change in vacancy density accompanying a decrease in the specific content element,
The said relational expression is the following relational expression (2), The temperature estimation method of the honeycomb member of Claim 1 or 2 characterized by the above-mentioned.
T = −b ₂ / ln {(H / (a ₂ · t)} (2)
However, t is the ambient temperature, T is the heating time, H is the variation of the pore density of the second alloy, a _{2 ·} b 2 is a specific constant dependent material species of the second alloy.   5. The temperature estimation method for a honeycomb member according to claim 3, wherein the second alloy has at least one of aluminum, nickel, iron, chromium, and titanium as the specific contained element. The second alloy has aluminum and nickel as contained elements and a gamma prime phase is formed,
The metal state parameter is a difference between a cubed value of the particle size of the gamma prime phase that is increased by heating and a cubed value of the particle size of the gamma prime phase before heating,
The said relational expression is the following relational expression (3), The temperature estimation method of the honeycomb member of Claim 1 or 2 characterized by the above-mentioned.
r ₁ ³ −r ₀ ³ = c · exp (−d / T) · t (3)
Where t is the ambient temperature, T is the heating time, r ₁ is the particle size of the gamma prime phase after heating, r ₀ is the particle size of the gamma prime phase before heating, and c and d are the materials of the second alloy An intrinsic constant by species. A honeycomb member comprising an assembly of hollow polygonal column cells,
A honeycomb member body formed of a first alloy;
A member to be measured, which is provided in the honeycomb member main body, and is formed of a second alloy whose metal state is changed by heating compared to the first alloy;
A honeycomb member comprising: The honeycomb member main body includes a flat plate portion formed in a flat plate shape, and a plurality of corrugated plates each having a plurality of protrusion portions that protrude from the flat plate portion to one side in the normal direction and extend in the same direction at intervals. One of the two corrugated plates that are stacked and adjacent to each other in the stacking direction is configured to abut against the other flat plate portion,
The honeycomb member according to claim 7, wherein the member to be measured is provided between two corrugated plates adjacent to each other in the stacking direction. The honeycomb member body includes a flat plate portion formed in a flat plate shape and a plurality of corrugated plates each protruding in the normal direction from the flat plate portion and having a plurality of protruding portions extending in the same direction at intervals from each other. And one of the two corrugated plates adjacent to each other in the laminating direction is configured such that the one projecting portion comes into contact with the other flat plate portion,
The member to be measured is formed in the same shape as the corrugated plate, and the plate portion to be measured is formed into a flat plate shape and protrudes from the plate portion to be measured to one side in the normal direction and is spaced from each other in the same direction. A plurality of projecting protrusions to be measured, provided between the two corrugated plates, the measured flat plate portion being joined to the projecting portion of the corrugated plate on the other side in the normal direction, and the measured projecting portions; The honeycomb member according to claim 7, wherein is bonded to a flat plate portion of the corrugated plate on one side in the normal direction.   10. The measurement object according to claim 7, wherein a dimension in a cell height direction in which a central axis of the cell extends is substantially the same as that of the honeycomb member main body. The honeycomb member according to 1.

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