40Cr钢软化退火态抗拉强度检测数据的不确定度分析  

Analysis on Measurement Uncertainty of Tensile Strength of Softening⁃Annealed 40Cr Steel

作　　者：马骁飞 殷俊林[2] MA Xiaofei;YIN Junlin(No.1 High School Affiliated to Tong Ji University,Shanghai 200438,China;Materials Science and Engineering School of Tong Ji University,Shanghai 200092,China)

机构地区：[1]同济大学第一附属中学,上海200438 [2]同济大学材料科学与工程学院,上海200092

出　　处：《柴油机设计与制造》2020年第2期44-46,共3页Design and Manufacture of Diesel Engine

摘　　要：本文以40Cr钢软化退火态的抗拉强度检测数据为基础,建立数据分析的数学模型。从检测的重复性、抗拉强度试验机力值系统误差、试验加载速度影响、试样截面面积测量误差等方面,分析并计算各主要标准不确定度分量,最终根据概率分布原理,得出抗拉强度检测数据的扩展不确定度,为评价试验数据的可靠性提供了一种评价方法。Based on the measured data of a 40Cr steel tensile strength in the state of softening an⁃nealing,this paper introduces a method for assessing the reliability of test results by establishing a mathe⁃matical model,analyzing and calculating the relative standard uncertainty components from measurement repeatability,the deviation of force measurement system,the effect of loading speed and the deviation of specimen size measurement,and forming the expanded uncertainty of the tensile strength with the princi⁃ple of probability distribution.

关 键 词：测量不确定度 40CR钢 软化退火 抗拉强度 

分 类 号：TG142.15[一般工业技术—材料科学与工程]