POST-BOND HEAT TREATMENT METHOD FOR DIFFUSION BONDED NICKEL-BASED SUPERALLOY

摘要

PURPOSE: A method for heat-treating the diffused junction nickel-based alloy is provided to improve the micro-structure and the mechanical property of the junction surface of a nickel-based alloy, bonded by the diffused junction, equal to a base material. CONSTITUTION: A method for heat-treating the diffused junction nickel-based alloy comprises the step of growing the crystal grain on a junction surface by heat-treating the diffused junction body of alloy 617 which is a nickel-based alloy under the high temperature and pressure. The heat-treatment is performed through the next step. Under the condition of the pressure of 110-7 torr or 110-5 torr, the diffused junction body is heated at a temperature rising speed of 3 to 6 C/min from the room temperature up to 1000 to 1200C. The heated diffused junction body is maintained for 15 to 25 hours at 1000 to 1200C. The heated diffused junction body is cooled to the room temperature.