航空发动机用单晶叶片铸造缺陷解读

Interpretation of Casting Defects in Single-crystal Blades for Aeroengines

综述了航空发动机用单晶叶片常见铸造缺陷定义、来源、危害和解决措施。分别介绍了小角度晶界、杂晶、再结晶组织、条带组织、雀斑、显微疏松、夹杂的定义和危害,通过分析各缺陷产生的机理和可能来源,给出相应解决措施。

The definition, source, hazard and problem-solving method of casting defects in aeroengine single-crystal blades and vanes were summarized. In order to provide suggestion to problem-solving methods, the definition and hazard of low angle grain boundary, isolated defects, recrystallizated grain, striation, freckle, microporosity, inclusion were introduced and the formation mechanism and possible source were analyzed, individually.