Abstract��The factors affecting the measurement of the mean linear expansion coefficient using the horizontal single-line jack dilatometer were systematically analyzed. And the test error sources were in the following areas�� the factors affecting the temperature changes�� including the bad sealing condition of the furnace door�� no temperature compensation function�� and the lack of the initial temperature equilibrium time�� the factors affecting the accurate measurement of the thermal expansion�� including the ejector pins were inclined�� the sample was not perpendicular to the axis�� the constant temperature water circulation system was not normal or cycle time was not enough�� the sample chamber was not level�� etc.�� the factors affecting the accurate measurement of the initial length�� including the ambient temperature�� humidity�� and precision measuring tools and so on. And the notice and method which can reduce the measuring error were put forwards.
�ش�������ά��. ������ϵ�����������е�������[J]. �й������ڿ���, 2017, 35(1): 25-28.
HE Chuan-lan��WANG Wei-xin. Error analysis of the linear expansion coefficient during the measurement process. Chinese Journal of Iron and Steel, 2017, 35(1): 25-28.
2017, Vol. 35 
