CN111308041A - Detection method for preparing single crystal blade by two-dimensional crystal selection method in 001 orientation optimization - Google Patents
Detection method for preparing single crystal blade by two-dimensional crystal selection method in 001 orientation optimization Download PDFInfo
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- CN111308041A CN111308041A CN202010315942.4A CN202010315942A CN111308041A CN 111308041 A CN111308041 A CN 111308041A CN 202010315942 A CN202010315942 A CN 202010315942A CN 111308041 A CN111308041 A CN 111308041A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
- C30B11/006—Controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/52—Alloys
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention belongs to the technical field of single crystal blade detection application, and particularly discloses a method for detecting the orientation optimization of a single crystal blade prepared by a two-dimensional crystal selection method in 001.
Description
Technical Field
The invention belongs to the technical field of single crystal blade detection application, and particularly relates to a detection method for preparing a single crystal blade in 001 orientation optimization by using a two-dimensional crystal selection method.
Background
The nickel-based single crystal superalloy is widely applied to manufacturing of aerospace engines and gas turbine blades. The most popular high-temperature alloy blade preparation methods at present are a crystal selection method and a seed crystal method. The crystal selection method generally uses a spiral crystal selector to finally obtain a single crystal with the orientation close to 001.
The seed crystal method controls the final single crystal orientation by prefabricating a seed crystal block in a seeding section and by the seed crystal block in a specific direction.
Whether the crystal selection method or the seed crystal method is adopted, the orientation of the crystal needs to be finally determined through EBSD detection or the Lorents method, the detection method is complicated, and the growth process of the orientation of the dendrite crystal cannot be intuitively reflected.
Therefore, based on the above problems, the present invention provides a detection method for optimizing 001 orientation of a single crystal blade prepared by a two-dimensional crystal selection method.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a detection method for preparing a single crystal blade by using a two-dimensional crystal selection method and optimizing the 001 orientation, which solves the problems of the existing detection method, improves the detection efficiency and the accuracy of detection data, and improves the product quality.
The invention provides a detection method for optimizing the 001 orientation of a single crystal blade prepared by a two-dimensional crystal selection method, which comprises the following steps of 1, establishing a spatial rectangular coordinate system according to the appearance direction of a section of a two-dimensional crystal selector in the 001 direction, 2, calculating the direction vector of a primary dendritic crystal by using the projections of the primary dendritic crystal on two side surfaces and the included angles α and β of the single crystal growth direction, 3, calculating the direction vector of a secondary dendritic crystal by using the projections of the secondary dendritic crystal on a horizontal cross section and the included angles A and B of the horizontal axial direction, 4, cutting a tangent plane parallel to the 001 direction of the two-dimensional crystal selector and a tangent plane horizontal to the 001 direction by using a wire cutting machine, and 5, determining the same dendritic crystal of the two tangent planes and the 001 angle to obtain the final orientation.
In the technical scheme, the calculation formulas of the component lengths of the primary dendrite direction C on the three coordinate axes in the step 2 are respectively ML = OL tan theta, Y-axis NL = OL tan theta, Z-axis OL, and C = OL (tan α, tan β, 1).
Compared with the prior art, the detection method for preparing the single crystal blade in the 001 orientation optimization by using the two-dimensional crystal selection method has the beneficial effects that: the problems of the existing detection method are solved, the detection efficiency and the accuracy of detection data are improved, the production process is adjusted through the detection result, and the product quality is improved.
Drawings
FIG. 1 and FIG. 2 are schematic views of a primary dendrite direction projection according to the present invention;
FIG. 3 is a schematic projection of the secondary dendrite direction vector of the present invention;
fig. 4, fig. 5 and fig. 6 are demonstration display intents of the detection flow of the present invention.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
The method for detecting the orientation optimization of the single crystal blade prepared by the two-dimensional crystal selection method as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6 comprises the following steps of 1, establishing a spatial rectangular coordinate system according to the appearance direction of the section of the two-dimensional crystal selector in the 001 direction, 2, calculating the direction vector of primary dendrite by using the projections of the primary dendrite on two side surfaces and the included angles α and β of the single crystal growth direction, 3, calculating the direction vector of secondary dendrite by using the projections of the secondary dendrite on the horizontal cross section and the included angles A and B of the horizontal axial direction, 4, cutting the section parallel to the 001 direction of the two-dimensional crystal selector and the section horizontal axial direction by using a wire cutting machine, and 5, determining the angles of the same dendrite and the 001 of the two sections to obtain the final orientation.
In the technical solution, the formula for calculating the component lengths of the direction C of the primary dendrite in the step 2 on three coordinate axes is respectively X-axis ML = OL tan θ, Y-axis NL = OL tan θ, Z-axis OL, C = OL (tan α, tan β, 1), and referring to fig. 1, the component length of C projected on the Z-axis is
The length of the component of vector c projected on the X axis can be found by using the angle α between the projection OM of c on the XOZ plane and the Z axis
The length of the component of vector c projected ON the Y axis can be found by using the angle β between the projection ON of c ON the YOZ plane and the Z axis
Thus, the direction vector of the primary dendrite can be expressed as:
。
the invention discloses a detection method for optimizing the 001 orientation of a single crystal blade prepared by a two-dimensional crystal selection method, which can calculate the orientation of a dendritic crystal by combining a vector method with an Euler angle, and further can calculate the orientations of primary dendritic crystals and secondary dendritic crystals; the orientation of the dendrite can be directly observed and measured on a transverse and longitudinal metallographic image combined with a crystal selection section by using a two-dimensional crystal selection method, and finally, the calculation orientation is determined; and comparing the orientation calculation result and the Euler angle manual calculation result of the EBSD method, and verifying that the Euler angle measurement result is close to the EBSD calculation result, and the final orientation can be directly measured and determined by combining the two-dimensional crystal selector method and a gold phase diagram, so that the reliability of the result is verified.
The invention discloses a detection method for preparing a single crystal blade by using a two-dimensional crystal selection method in 001 orientation optimization, which adopts a polar diagram method and combines a gold phase method to respectively carry out crystal judgment and orientation analysis on a C-type two-dimensional crystal selector and a Z-type crystal selector which are grown by directional solidification.
The results show that: through the metallographic diagrams of the transverse and longitudinal sections of the C-type crystal selector, the Euler angles of phi 1= xx degrees, phi = xxx degrees and phi 2= yyy degrees can be determined, and the crystal is rotationally oriented according to the Euler angles, and a pole figure is measured after the crystal is cut again, so that the crystal is well oriented; and the pole figure method judgment result is consistent with the metallographic examination result.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (2)
1. The method for detecting the orientation optimization of the single crystal blade prepared by the two-dimensional crystal selection method is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step 1, establishing a space rectangular coordinate system according to the appearance direction of a section of a two-dimensional crystal selector in the 001 direction;
step 2, calculating an included angle α and an included angle β between the projection of the primary dendrite on two side surfaces and the growth direction of the single crystal
A direction vector of the secondary dendrite;
step 3, calculating the direction vector of the secondary dendrite by utilizing included angles A and B between the projection of the secondary dendrite on the horizontal cross section and the horizontal axial direction;
step 4, cutting a section parallel to the 001 direction of the two-dimensional crystal selector and a section horizontal to the 001 direction by using a linear cutting machine;
and 5, determining the angles of the same dendrite and 001 of the two tangent planes to obtain the final orientation.
2. The method for detecting 001 orientation optimization of a single crystal blade manufactured by a two-dimensional selection method according to claim 1, wherein the calculation formula of the component lengths of the primary dendrite direction C in the step 2 on three coordinate axes is ML = OL tan theta, Y-axis NL = OL tan theta, Z-axis OL, C = OL (tan α, tan β, 1).
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| CN202010315942.4A CN111308041A (en) | 2020-04-21 | 2020-04-21 | Detection method for preparing single crystal blade by two-dimensional crystal selection method in 001 orientation optimization |
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| CN202010315942.4A CN111308041A (en) | 2020-04-21 | 2020-04-21 | Detection method for preparing single crystal blade by two-dimensional crystal selection method in 001 orientation optimization |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350161A (en) * | 2000-10-23 | 2002-05-22 | 武汉大学 | Cast alloy crystal orientation measuring instrument and method |
| CN108171008A (en) * | 2018-01-23 | 2018-06-15 | 东北大学 | A kind of Forecasting Methodology in continuous casting billet dendritic growth direction |
| CN109211905A (en) * | 2018-10-19 | 2019-01-15 | 中国工程物理研究院机械制造工艺研究所 | A kind of single crystal super alloy orientation scaling method and its application |
| CN109916693A (en) * | 2019-04-01 | 2019-06-21 | 西北工业大学 | A kind of method of determining casting single crystal high temperature alloy crystal orientation |
-
2020
- 2020-04-21 CN CN202010315942.4A patent/CN111308041A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350161A (en) * | 2000-10-23 | 2002-05-22 | 武汉大学 | Cast alloy crystal orientation measuring instrument and method |
| CN108171008A (en) * | 2018-01-23 | 2018-06-15 | 东北大学 | A kind of Forecasting Methodology in continuous casting billet dendritic growth direction |
| CN109211905A (en) * | 2018-10-19 | 2019-01-15 | 中国工程物理研究院机械制造工艺研究所 | A kind of single crystal super alloy orientation scaling method and its application |
| CN109916693A (en) * | 2019-04-01 | 2019-06-21 | 西北工业大学 | A kind of method of determining casting single crystal high temperature alloy crystal orientation |
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Application publication date: 20200619 |