Heat Treatment of Metals ›› 2020, Vol. 45 ›› Issue (4): 212-220.DOI: 10.13251/j.issn.0254-6051.2020.04.045

• TEST AND ANALYSIS • Previous Articles     Next Articles

Comparative analysis of standards for determining average grain size

Bi Geping1, Chen Jinzhe2, Tan Wenhua1, Li Qiao3   

  1. 1. China National Quality Supervision and Inspection Center for Knife, Scissors and Domestic Metal Tool, Yangjiang Guangdong 529539, China;
    2. China National Accreditation Service for Conformity Assessment, Beijing 100062, China;
    3. China Heat Treatment Standardization Technical Committee, Beijing Research Institute of Mechanical and Electrical Technology Ltd., Beijing 100083, China
  • Received:2019-09-30 Online:2020-04-25 Published:2020-05-08

Abstract: Five aspects of 17 standards for determining average grain size of metallic materials were compared and analyzed, including the definitions of the grain size, the chart comparison procedure, the planimetric procedure, the intercept procedure, and the accuracy. The consistencies, differences and shortcomings among these standards were clarified through comparative analysis, and the results were conducive to the selecting and using of the standards by metallographers and the continual improvement of standardization work.

Key words: average grain size, standardization, comparative analysis of standards

CLC Number: