洁净钢中的非金属夹杂物(non-metallic inclusion,NMI)主要在炼钢工艺过程中产生,对宏观性能有很大影响.分析NMI可以建立钢铁工艺与性能之间的“桥梁”,为洁净钢产品工艺控制及新品研发提供参考依据.综述NMI表征方法,根据样品制备方法将其分为35种.针对尺寸为1～20 μm微观夹杂物采用扫描电镜进行自动分析已经成为当前研究应用热点.对NMI表征方法做了简要介绍,并以具体实践举例说明测试结果可以反映炼钢工艺制度(总氧控制),与最终宏观性能(拉拔断丝率)完全对应.该方法可供国内外同行参考.
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