分析了压铸过程中模具的热疲劳失效机理及其影响因素，讨论了优化压铸过程控制对模具寿命的影响。
Heat fatigue failure mechanism of the die casting dies during the process of die casting were analyzed, and the influence of optimizing process control on die life of die casting were discussed.
陶瓷涂层的热震失效是由于涂层在循环加热和冷却过程中，涂层内产生循环热应力，导致涂层发生热疲劳失效。
The thermal shock failure of ceramic coating is essentially the fatigue failure induced by cyclic thermal stress during repeated heating and cooling.
对某车型发动机排气歧管的热疲劳断裂问题进行综合失效分析，并从材料、结构方面提出改进意见。
This paper gives a comprehensive failure analysis on the thermal fatigue crack of engine exhaust manifold and makes an improvement for materials and structures.
在热交变应力的作用下，热疲劳是铸铁工件的主要失效形式之一。
Under act of the alternating thermal stress, thermal fatigue is one of theprimary invalidity forms of cast iron workpiece.
在不同的切削条件下，疲劳裂纹和热裂纹是造成刀具材料失效的主要原因。
The formation of the fatigue cracks and the thermally induced cracks are mainly responsible for the failure of the ceramic tool materials under various cutting conditions.
利用扫描电镜对失效压铸模具热疲劳裂纹的宏观、微观、断口形貌进行了分析。
The macro-morphology, micro-morphology and fracture morphlogy of failure die casting dies were analyzed.
高温工模具的失效方式主要为工作面的热磨损和氧化热疲劳。
Failure of the high temperature tools includes mainly hot-wearing, oxidizing and hot-fatigue.
电镜观察显示热疲劳是硬质合金热挤压模具失效的主要原因。
The SEM observation shows that thermal fatigue is the major cause of the failure of the steel hard alloy die.
在不同的切削条件下，疲劳裂纹和热裂是造成刀具材料失效的主要原因。
The formation of the fatigue cracks and the thermally induced cracks are mainly responsible for the failure of the ceramic tool materials un der various cutting conditions.
热疲劳是热作模具的主要失效形式之一。
Thermal fatigue is one of the primary form of hot-work die steels failures.
认为取热管的失效主要由于热疲劳造成的。
It is indicated that the failure of the tube coils is mainly caused by heat fatigue.
结果表明，精铸热锻模的主要失效形式为热磨损、塑性变形、热疲劳裂纹、冲击疲劳破断和脆性断裂。
The results show that hot-forged cast dies take thermal wear, plastic deformation, thermal fatigue, impact fatigue fracture and brittle fracture as predominant failure patterns.
在热压模缎中，模具失效的主要模式是腐蚀作用、热疲劳、机械疲劳和永久性即塑性变形。
In hot impression die forging, the principal modes of die failure are erosion, thermal fatigue, mechanical fatigue and permanent (plastic) deformation.
电镜观察显示热疲劳是硬质合金热挤压模具失效的主要原因。
The SEM observation shows that thermal fatigue is the major cause of the failure of the ste…
电镜观察显示热疲劳是硬质合金热挤压模具失效的主要原因。
The SEM observation shows that thermal fatigue is the major cause of the failure of the ste…
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