结果表明，辊身心部较高的内应力和在带状碳化物中存在严重的网状碳化物是造成大型支承辊置裂的主要原因。
The results showed that the higher internal stress and serious carbide network in the banded carbide in the inner roll body were the main causes of heavy back-up roll stationary cracking.
受位错附近应力场与气流的影响，V缺陷两侧出现带状高坡。
Influenced by the gas flow pattern and stress field near the dislocations, strip ribbons lied beside the V defects.
模具组织中存在不均匀带状分布的碳化物是产生断裂失效的内在原因，而模具在冷挤压成型过程中形成的应力积累是导致模具断裂失效的外在诱因。
The existence of uneven carbide belts is the inner reason of fracture failure and the stress accumulation during the process of cold extruding is its external incentives.
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