Method for obtaining GH4169 alloy forge piece with uniform and fine grain structure

• Main Authors: LIN YONGCHENG, LOU YUMIN, HUANG YIJUN, ZHAO NINGNING, CHEN ZIJIAN, WANG BO, TONG XIAOZHONG
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a method for obtaining a GH4169 alloy forge piece with a uniform and fine grain structure. The GH4169 alloy forge piece is subjected to graded aging heat treatment firstly and then recrystallization annealing is performed, so that a GH4169 alloy forging mixed crystal structure is reduced, and grains are uniformly refined. The method has the beneficial effects that the delta phase is evenly separated out through phase change, then static recrystallization nucleation is promoted to evenly occur in the alloy, grain growth is effectively hindered through the delta phase, then reasonable heat treatment heat preservation temperature and heat preservation time are selected, subduction of a GH4169 alloy mixed crystal structure is achieved, meanwhile, grains are refined, and the alloy quality is improved. And the structure stability and uniformity of the GH4169 alloy forge piece are improved. 本发明涉及一种获得均匀细小晶粒组织GH4169合金锻件的方法，通过先进行分级时效热处理然后进行再结晶退火的方式消减GH4169合金锻造混晶组织并且均匀细化晶粒。本发明的有益效果是：本发明通过相相变均匀析出