摘要
以碳钢硬度试验为例,对金属材料布氏硬度试验中的测量不确定度来源进行了分析,并对测量结果的不确定度进行了详细的评定。另外,着重研究了测量数学模型里的灵敏系数对各不确定度的影响。评定不确定度时,应考虑硬度计复现性所引入的不确定度。
Taking example for carbon steel hardness test,the sources of measurement uncertainty for Brinell hardness of metallic materials are analyzed,and the measurement uncertainty for Brinell hardness of metallic materials is detailedly evaluated.In addition,the influences of sensitivity coefficient in the mathematical model on measurement uncertainty are emphasisly studied.During the course of evaluating the measurement uncertainty,the reproducibility of hardness machine should be considered.
出处
《工程与试验》
2010年第3期24-27,共4页
Engineering and Test
基金
国家级实验教学示范中心建设项目(2007)
北京科技大学分析检验服务平台项目(2009)
关键词
不确定度
布氏硬度试验
评定
uncertainty
Brinell hardness test
evaluation
