压铸模具的型芯变形失效很容易造成铸件的成批量报废。
During die casting, core deformation resulting in batches rejected castings is very easy.
在众机理中，主要是：腐蚀失效、环境断裂失效、变形失效和断裂失效。
They are mainly corrosion failure, environment fracture failure, distortion failure and fracture failure.
分析表明：该管线的变形失效是在加套管过程中工艺安排不当所致，在施工过程的试压期间引起了内管的外压失稳，使内管产生永久的变形。
The impact of some key construction links on destabilization of the external pressure of the inner pipes was analyzed and verified in the course of pope-line rebuilding.
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