从化学成分、布氏硬度、金相组织、冲击性能、拉伸性能等5个方面对报废游车大钩钩体材料进行测试试验，将试验值与行业标准规范进行对比，对报废大钩钩体材料的机械性能进行分析。该研究对深入了解游车大钩报废原因具有指导意义。
In this paper, chemical composition, Brinell hardness, metallographic structure, impact property and tensile property were used to test the hook body of abandoned travelling block, and the test values were contrasted with the industry standard and specifications, through which the performance of the hook materials used in the invalidated travelling block was analyzed. It provides guidance for deeply understanding the reason of abandoned travelling blocks.
