高频感应炉燃烧后红外吸收法测定管线钢碳硫含量不确定度评定

Evaluation of Measurement Uncertainty of Carbon and Sulfur Contents in Linepipe-purposed Steel with High Frequency Induction Furnace Combustion IR-absorption Method

依据JJF 1059.1—2012标准,分析了高频感应炉燃烧后红外吸收法测定管线钢中碳硫含量不确定度的影响因素,建立数学模型,并对管线钢中碳硫含量测定结果的不确定度进行评定,确定和计算测定过程中各个不确定度分量。对不确定度分量的数值进行比较发现,B类标准不确定度是分析碳硫含量不确定度的主要来源,仪器示值误差不确定度对总不确定度的影响最大。

Analyzed are the elements as affecting the measurement uncertainty of contents of C and S in the linepipe-purposed steel by means of using the HF induction furnace combustion infrared absorption method as per Standard JJF 1059.1--2012. And relevant math model is set up, and the uncertainty of the result from measurement of C and S contents of the said steel is evaluated. Also done is determining and calculating each individual uncertainty component as identified during measuring process. Based on the result of comparison of the uncertainty components, it is revealed that the uncertainty of Standard B acts as the main source of uncertainty of C and S contents analysis, while the instrument indication error uncertainty makes the largest contribution to the total uncertainty.