摘要
研究了钢中夹杂物粒径、分布状态与全氧的对应关系,并探讨了大颗粒夹杂物含量与试样中全氧波动的相关性,量化了全氧检测法对洁净度的评价,结果表明:(1)钢中单位体积内夹杂物数量随粒径增大呈指数下降,粒径小于10μm夹杂物占总夹杂物数量的95%以上,夹杂物在钢中分布的均匀性随夹杂物粒径增大而降低;(2)钢中粒径小于10μm夹杂物中含氧量与钢中平均全氧有很好对应关系,全氧可以反映钢中分布均匀的夹杂物水平;(3)钢中大颗粒夹杂物越多,同一试样中全氧多次检测结果的波动越大,全氧的波动可以反映钢中大颗粒夹杂物的含量.
The relationship between the size distribution of inclusions and the total oxygen in steel was studied by following the inclusions' size and number of the samples at different locations. The content of macro-inclusions in liquid steel could be estimated accurately by the fluctuation of total oxygen in the same sample,which quantified the cleanliness evaluation index. The number of inclusions per unit volume decreased exponentially with the increase in sizes. Also,the distribution uniformity of inclusions in steel worsened as the size increased. Thus,micro-inclusions with the size below 10 μm occupied above 95% of total inclusions in the liquid steel,which showed a good relationship between the measured value of total oxygen and the integration oxygen in micro-inclusions.Total oxygen could represent the uniform distribution level of inclusions in steel; good uniform of inclusions in steel meant small fluctuation. Macro-inclusions could result in the fluctuation of total oxygen. Large fluctuation of total oxygen reflected a high amount of macro-inclusions in steel.
出处
《工程科学学报》
EI
CSCD
北大核心
2015年第S1期1-5,共5页
Chinese Journal of Engineering
基金
中央高校基本科研业务费项目(FRF-TP-14-125A2)
钢铁冶金新技术国家重点实验室开发基金资助项目(KF13-09)
教育部博士点专项基金资助项目(20130006110023)
"十二五"国家科技支撑计划资助项目(2012BAF04B02)
关键词
夹杂物
粒径分布
全氧
洁净度
inclusions
particle distribution
total oxygen
cleanness
