Failure of cast aluminium alloy box was analysed by metallographic and fractographic analysis, and cast defect and variation of cross section thickness were identified as main causes of failure.
通过金相及电镜断口分析，确定箱体失效系铸造缺陷和几何截面差过大所致。
The mechanical properties testing, microstructure observation and fractographic features analysis of the troostite high chromium cast iron blade were carried out.
通过金相、性能和热处理试验，对盘条拉丝断裂原因进行了分析，认为盘条存在屈氏体组织是断裂的根本原因。
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