LC9锻环经探伤检验内部存在缺陷。
Defects were found in side of LC 9 forged ring after detection.
结果表明，锻环圆锭毛坯中存在夹杂是导致LC9锻环内裂的原因。
The results show that the cause of interior cracks of LC9 forged ring is due to inclusions existed in the billet of forged ring.
对锻轧机辊环的化学成分进行了科学设计，对辊环的离心铸造工艺、软化退火工艺、淬火工艺和回火工艺进行了深入研究。
In this papers, the composition of forging and rolling machine roll sleeve is scientifically designed, the centrifugal casting and heat treatment process of roll sleeve are researched.
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