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某乡镇企业自炼自轧φ25mm的螺纹建材用钢,在做常现力学及冷弯曲检验时,多次出现断裂和屈眼点不明显的异常现象。为确定其断裂的原因和性质,我们对该批钢筋进行了化学成分分析和显微组织鉴定。1检验(1)化学成分分析断裂试样的化学分析结果见表1。(2)金相检验在MM6显微镜
A township enterprises self-refining self-rolling φ25mm thread steel for construction materials, often in the current mechanics and cold bending test, the fracture and the king of many times there is no obvious anomalies. In order to determine the reason and nature of the fracture, we analyzed the chemical composition and the microstructure of the steel bars. 1 test (1) chemical composition analysis results of chemical analysis of fracture specimens in Table 1. (2) Metallographic examination in the MM6 microscope