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一、前言高温工作零件的失效约有80％起因于各种疲劳,而热疲劳是一种最普遍的失效形式。如大功率内燃机气缸头这类带有水冷系统的零件的失效主要起源于热疲劳裂纹。裂纹往往发生在工作
I. INTRODUCTION About 80% of the failures of hot working parts are caused by various kinds of fatigue, and thermal fatigue is one of the most common forms of failure. Such as high-power internal combustion engine cylinder head with water cooling system failure of parts mainly originated in thermal fatigue cracks. Cracks often happen at work