扫描电镜和电解萃取法用于超洁净钢中夹杂物的表征

发布时间：2018-03-21 02:43

本文选题：ASPEX扫描电镜　切入点：电解萃取　出处：《冶金分析》2017年08期 　论文类型：期刊论文

【摘要】：非金属夹杂物对轴承钢性能有较大危害,全面掌握钢中夹杂物的信息对提高轴承钢质量至关重要。实验采用ASPEX扫描电镜检测和水溶液电解萃取相结合的方法检测了超洁净轴承钢中夹杂物颗粒的尺寸、分布、类型、原始三维形貌等信息,并且对比了两种检测方法。结果表明,两种方法都检测出该超洁净钢中夹杂物类型包括硫化物、氧化物、硫化物和氧化物的复合型夹杂物以及钛的化合物,其中大部分夹杂物是硫化物,其次是氧化物和硫化物的复合类夹杂物,颗粒尺寸多小于5μm。这两种方法在检测夹杂物类型和尺寸方面的结果是一致的,且均可靠。在大尺寸夹杂物检测方面,两种方法都检测到大尺寸的CaO夹杂物,而电解萃取的方法进一步检测到约18μm的SiO_2·Al_2O_3复合氧化物夹杂,因此电解萃取法对于数量稀少的大尺寸夹杂物的检测更为有效和可靠。
[Abstract]:Non-metallic inclusions are harmful to the performance of bearing steel. It is very important to master the information of inclusions in steel to improve the quality of bearing steel. The size, distribution and type of inclusions in ultra-clean bearing steel were detected by ASPEX scanning electron microscopy and electrolytic extraction in aqueous solution. The results show that the inclusion types in the ultraclean steel include sulfide, oxide, and so on, and the results show that the two methods can detect the inclusions in the ultra-clean steel, such as sulphide, oxide, and so on. Complex inclusions of sulphides and oxides, as well as titanium compounds, most of which are sulphides, followed by oxides and sulfides, The particle size is less than 5 渭 m. The results of the two methods are consistent and reliable in detecting the type and size of inclusions. In the detection of large size inclusions, both methods can detect large size CaO inclusions. However, about 18 渭 m of SiO_2 路Al_2O_3 complex oxide inclusions were further detected by electrolytic extraction, so the method of electrolytic extraction is more effective and reliable for the detection of large size inclusions.
【作者单位】：北京科技大学冶金与生态工程学院;
【基金】：国家国际科技合作专项项目(No.2015DFG51950) 国家重点研发计划汽车齿轮用钢质量稳定性提升关键技术开发及应用(No.2016YFB0300102)
【分类号】：TG142.15

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