Detection method for 001 orientation optimization of single crystal blade prepared by two-dimensional crystal selection method

Abstract

The invention belongs to the technical field of single crystal blade detection application, and particularly discloses a detection method for 001 orientation optimization of a single crystal blade prepared by a two-dimensional crystal selection method, which comprises the following steps: step 1, establishing a space rectangular coordinate system according to the appearance direction of the crosssection of a two-dimensional crystal selector in the 001 direction; 2, calculating a direction vector of the primary dendritic crystal by utilizing projections of the primary dendritic crystal on twoside surfaces and included angles alpha and beta of the growth direction of the single crystal; 3, calculating a direction vector of the secondary dendrite by utilizing the included angles A and B between the projection of the secondary dendrite on the horizontal cross section and the horizontal axial direction; 4, a wire cutting machine is used for cutting a tangent plane parallel to the 001 direction of the two-dimensional crystal selector and a tangent plane horizontal to the 001 direction; and step 5, determining the same dendritic crystal of the two tangent planes and the angle of 001 toobtain the final orientation. The method has the advantages that the problems existing in an existing detection method are solved, the detection efficiency and the accuracy of detection data are improved, the production process is adjusted according to the detection result, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of detection and application of single crystal blades, and in particular relates to a detection method for optimizing the 001 orientation of single crystal blades prepared by using a two-dimensional crystal selection method. Background technique [0002] Nickel-based single crystal superalloys are widely used in the manufacture of aerospace engines and gas turbine blades. At present, the most mainstream methods for preparing superalloy blades are crystal selection method and seed crystal method. The crystal selection method usually uses a spiral crystal selector to finally obtain a single crystal close to the 001 orientation. [0003] In the seed crystal method, a seed crystal block is prefabricated in the seeding section, and the final single crystal orientation is controlled by the seed crystal block in a specific direction. [0004] Regardless of the crystal selection method or the seed crystal method, ...

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Problems solved by technology

[0004] Regardless of the crystal selection method or the seed crystal method, the final orientation needs to be determined by EBSD detection or the Lawrence method. The detection method is cumbersome and cannot directly reflect the growth process of dendrite orientation.

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