Abstract：The grain of a hot rolling wire rod was observed by the LEICA optical microscope in the multiple of 100，and the average intercept of grains was measured by intersection point method in the metallographic analysis software. Then，the source of uncertainty in measuring the average intercept was analyzed，and each uncertainty component was evaluated.Finally，the synthetic uncertainty and the expanded uncertainty of the average grain size were calculated，according to the uncertainty propagation law.
宋云霞，吕海瑶，贾东涛，李世琳. 平均晶粒度检测结果的测量不确定度评定[J]. 物理测试, 2019, 37(3): 53-55.
SONG Yun-xia，LU. Hai-yao， JIA Dong-tao， LI Shi-lin. Evaluation of measurement uncertainty of average grain size. PHYSICS EXAMINATION AND TESTING, 2019, 37(3): 53-55.
2019, Vol. 37 
