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    Q195钢盘条拉拔断裂原因

    Reasons for the fracture of Q195 steel wire rod during pulling and drawing

    • 摘要: 某Q195钢盘条在拉拔过程中出现断裂现象。采用宏观观察、化学成分分析、扫描电镜及能谱分析、金相检验、生产过程回查等方法对盘条断裂的原因进行分析。结果表明:该热轧盘条发生斜茬状断裂的原因是钢坯表面缺陷遗传;发生缩颈断裂的原因是盘条表面氧化铁皮未除尽及载荷过大。

       

      Abstract: A Q195 steel wire rod experienced fracture during pulling and drawing process. The causes of wire rod fracture were analyzed using methods such as macroscopic observation, chemical composition analysis, scanning electron microscopy and energy spectrum analysis, metallographic examination, and production process review. The results show that the reason for the oblique fracture of the hot-rolled wire rod was the inheritance of surface defects on the steel billet. The reason for necking fracture was that the oxide scale on the surface of the wire rod was not completely removed, and the load was too high.

       

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