GB/T 9441-2009: Translated English of Chinese Standard. (GBT 9441-2009, GB/T9441-2009, GBT9441-2009): Metallographic test for spheroidal graphite cast iron
https://www.chinesestandard.net, 2016 M05 21 - 23 pages
This standard specifies the method for assessing the microstructure of spheroidal graphite cast iron in optical microscopes. This standard specifies the methods for assessing spheroidizing grade, graphite size, number of nodular graphite, number of pearlite, number of ferrite in dispersed distribution, number of phosphide eutectic, and number of carbide; it lists out the corresponding standard figures.
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13B Pearlite 16B Pearlite 25 Figure 28B Ferrite 29B Ferrite 32 Phosphor 34 Phosphor 36 Carbide acid alcohol solution Annex assessment against corresponding Calculate the number choose the typical corresponding standard figures corroded with 2%~5 dispersed distribution entire tested surface extract polished-state nodular Ferrite 15 Ferrite 20 Figure Ferrite 30 ferrite in dispersed fields of view Figure A.1 Figure number GB/T Grade Figure 100 graphite by threshold graphite cast iron image analyzer magnificence of 100 measuring grid modified in relation nitric acid alcohol number of carbide number of ferrite number of graphite number of pearlite number of phosphide observe the entire Pearlite 15 Figure Pearlite 20 Pearlite 45 Pearlite 55 Pearlite 65 Figure phosphide eutectic Phosphor 1.5 polished-state graphite polished-state nodular graphite polished-state samples samples are corroded shown in Table spheroidal graphite cast standard diagram standard is modified Test report test the number threshold segmentation typical fields unit square millimeter