METHOD OF HEAT TREATMENT OF HEAT-RESISTANT ALLOY FOR EXCELLENT RESISTANCE TO INTERGRANULAR CRACK AND HEAT-RESISTANT ALLOY THE SAME

摘要

The present invention relates to heat treatment method heat-resisting alloys with splitting resistance between excellent particle and its alloy. Heat-treating methods are manufactured in heat-resisting alloy and processing includes: step dissolution heat treatment predetermined time 1260-1280& deg; C; The cooling velocity 5-10 & deg that step slowly cools down; Heating rate is 800-950& deg; C to immediately carry out ageing treatment solution treatment in such a way; The treatment of step adult is due to being kept for the predetermined time at 800-950& deg; C slow cooling steps in such a way; With the cooling ageing treatment in such a way of air of step. According to the present invention, the crystal boundary heat-resisting alloy of shape forms sawtooth, and the crystal boundary of shape becomes saw-tooth like shape, while keeping the fundamental characteristics of nickel group heat-resisting alloy. Therefore, effect of the invention is that whose surface of induction precipitation stable carbide can be low, improves binding force crystal boundary and matrix; Such as creep, fatigue is damaged to improve resistance relative to intergranular crack, the 900& deg at high temperature in oxidation, burn into etc.; C or more. ;The 2015 of copyright KIPO submissions