GB/T 6394-2017: Translated English of Chinese Standard (GBT 6394-2017, GB/T6394-2017, GBT6394-2017): Determination of estimating the average grain size of metal
https://www.chinesestandard.net, 20 lug 2017 - 50 pagine
This standard specifies the expression and determination methods of the average grain size of metal structure, including the comparison method, area method and interception method; it is applicable to the single-phase structure; however, after being specified, it is also applicable to the determination of the average grain size of the certain type in the multi-phase or multi-component sample. If the histomorphology of the non-metallic material is similar to the metal structure in the rating chart, it may also make reference to it.
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Terms and definitions
Overview and application
Grain size of nonequiaxed grain
Grain size of sample containing two or more phase structures
Grain size report
Precision and deviation
Appendix A Normative Grain size formation and display method
Appendix B Normative Statistical technique Calculation of confidence interval and relative error of grain size measurement results
Informative Grain size measurement basis
Parole e frasi comuni
1-times 500 mm measuring area method austenite grain boundary Average diameter average intercept length average value boundary intersection count calculate the average calculated in accordance carbon content mass carbon steel carburizing procedure cementite comparison method confidence interval content mass fraction cooled count the number determine the grain deviation equiaxed grain etchant etching ethanol eutectoid evaluate the grain ferrite grain ferrite steel field of view formula GB/T Grain displayed grain intercept count grain number grain shape grain size level grain size measurement grain size number heat treatment intersection method longitudinal plane Macro-grain size number magnification factor Mb measurement results measuring grid non-equiaxed grain structure normal plane number G number of grains Number of intercept original austenite grain pearlite picric acid precision randomly relationship relative error requirements series rating chart show the original standard rating chart substrate grain temperature test line test surface transverse plane twin grain unit length view field