Method for preparing isometric crystal high temperature alloy casting alloy/ceramic interface reaction test sample

Abstract

The invention relates to a method for preparing an isometric crystal high temperature alloy casting alloy/ceramic interface reaction test sample, which comprises the following steps of: preparing a shell mold in which ceramic cores are arranged by the traditional investment casting process; heating the shell mold in a heater of a directional solidification vacuum induction furnace to different temperatures at which alloy/ceramic interface reaction is expected to be performed, and preserving heat; remelting a high temperature alloy ingot, pouring into a cavity of the shell mold, and pulling the heater out at a certain speed to form directional solidification castings or test samples with the cores; and cutting the directional solidification castings or test samples at different heights to acquire data of alloy and ceramic which react at the same temperature for different time. The method has the advantages that: the interface reaction time can be steplessly changed according to sampling positions, so that test efficiency is improved; the interface reaction results of the ceramic cores with different components can be obtained in one module at the same time; and the interface reaction condition can be visually observed by a microscope, so that reaction products and a reaction mechanism are determined, and the actual production of the isometric crystal castings is instructed.

Description

technical field [0001] The invention is a method for preparing equiaxed superalloy casting alloy / ceramic interface reaction sample, [0002] It belongs to the field of high-temperature alloy precision casting. Background technique [0003] Gas turbine engines have become an important prerequisite and bottleneck for the development of my country's aircraft and even large aircraft. Superalloys and their parts forming technology have always been called the heart of gas turbines and have been used to manufacture gas turbine hot end components. Many structural castings used as gas turbines mostly use equiaxed superalloys, and some castings are complex and have a hollow structure, and sometimes ceramic cores are used to form the inner cavity. This will inevitably lead to contact interface reaction between the alloy melt and the ceramic core at high temperature during the solidification process after remelting and pouring of the superalloy. If the interface reaction is serious, t...

AI Technical Summary

Problems solved by technology

Its disadvantages are as follows: first, errors occur due to the inability to visually observe the reaction product and the reaction interface; second, the influence of the reaction temperature can only be judged, and the reaction time cannot be judged

Its disadvantages are: first, it can only judge the influence of reaction temperature but it is difficult to consider the influence of reaction time; second, it needs to pour multiple furnace castings or test rods, and the test efficiency is low