Method of determining homogenization/solid solution heat treatment institution of nickel-base monocrystal high temperature alloy

Abstract

The invention belongs to the technical field of nickel-base monocrystal high temperature alloy preparation, and relates to a method of determining a homogenization / solid solution heat treatment institution of nickel-base monocrystal high temperature alloy. The method comprises the steps that the first-stage homogenization / solid solution heat treatment temperature is determined; the highest-stage homogenization / solid solution heat treatment temperature is determined; the intermediate-stage homogenization / solid solution heat treatment temperature is determined; and the homogenization / solid solution heat treatment institution is determined. When the method is used, the alloy can be subjected to homogenization / solid solution heat treatment at the temperature higher than the cast-state initialmelting temperature, and no initial melting defect is generated. Meanwhile, due to the fact that the higher homogenization / solid solution heat treatment temperature is adopted, the better homogenization effect can be obtained in the short homogenization / solid solution heat treatment period, no initial melting defect is generated, and then the problems that due to the fact that the contents of high-melting-point elements are high, dendritic segregation of the elements is serious, a homogenization / solid solution heat treatment window is small, and the homogenization difficulty is high are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of nickel-based single-crystal superalloy preparation, and relates to a method for determining the homogenization / solution heat treatment system of nickel-based single-crystal superalloy, which is suitable for containing (mass percentage) 4-8% Re, 0-7% Ru nickel-based single crystal superalloys can also be used in the design of solution heat treatment systems for other single crystal superalloys. Background technique [0002] In order to develop higher-performance aero-engines, the temperature in front of the engine turbine continues to increase. Therefore, advanced aero-engine turbine blades must work under conditions such as high temperature, high load, high speed, complex stress, and gas corrosion, and the service environment is extremely harsh. Due to their excellent comprehensive properties, single crystal superalloys are currently the preferred materials for high-performance aeroengine turbine blades....

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Problems solved by technology

[0014] The purpose of the present invention is to provide a method for determining the homogenization / solution heat treatment system of nickel-based single crystal superalloys. The problem of poor solution heat treatment caused by severe segregation, narrow solution heat treatment window, and difficulty in homogenization

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