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前言 遵照伟大领袖毛主席“独立自主,自力更生”的方针,为了适应我国航空工业发展的需要,我所与621所,交通大学等单位共同研制了SFG—2合金,作为708工程中915涡轮风扇发动机一级涡轮叶片材料。这是一种新型的镍基铸造高温合金,具有较好的综合热强性能,它利用沉淀强化、固溶强化和晶界强化三种基本强化机理,来满足性能要求。它们的主要机理将于文中述及。在铸造
Foreword In line with the principle of “independence, self-reliance” by Chairman Mao, the great leader, in order to meet the needs of the development of China’s aviation industry, SFG-2 alloy has been jointly developed with 621 units, Jiaotong University and other units. As a project of the 915 turbofan engine in the 708 project Grade turbine blade material. This is a new type of nickel-base cast superalloy with good overall thermal properties. It uses three basic strengthening mechanisms: precipitation strengthening, solution hardening and grain boundary strengthening to meet the performance requirements. Their main mechanism will be described in the text. In casting