金相法测量连铸坯纯净度的不确定度评定  

Uncertainty Evaluation on Measuring the Cleanliness of Continuous Casting Slab by Metallographic Method

作　　者：潘梦忠 赵锦 杨春龙 王士瑞 PAN Mengzhong;ZHAO Jin;YANG Chunlong;WANG Shirui(Zhenshi Group Eastern Special Steel Co.,Ltd.,Jiaxing 314000,China)

机构地区：[1]振石集团东方特钢有限公司,嘉兴314000

出　　处：《理化检验（物理分册）》2020年第11期16-18,24,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：以夹杂物尺寸、夹杂物弥散分布量作为连铸坯纯净度的量值,可采用金相法测量。从试验重复性、金相显微镜计量性能、夹杂物的人工计数、数显卡尺计量性能等方面对影响纯净度测量结果的不确定度进行分析,并对各不确定度分量计算和合成,最终得到纯净度测量结果的不确定度报告。结果表明:连铸坯夹杂物尺寸相对扩展不确定度为9.3%,夹杂物弥散分布量相对扩展不确定度为7.6%,包含因子k=2。The inclusion size and dispersion were regarded as the value of the cleanliness of continuous casting slab,which can be measured by metallographic method.The uncertainty that influencing the cleanliness measuring results was analyzed from the aspects of repeatability of experiment,metrology performance of metallographic microscope,manual counting of inclusion,metrology performance of digital caliper and so on,and the uncertainty components were calculated and synthesized.Finally,the uncertainty report for the cleanliness measuring results was obtained.The results show that the relative expanded uncertainty of inclusion size of continuous casting slab was 9.3%,the relative expanded uncertainty of inclusion dispersion distribution was 7.6%,and the inclusion factor k=2.

关 键 词：连铸坯 纯净度 金相法 人工计数 不确定度评定 

分 类 号：TB93[一般工业技术—计量学]