showing the same impression on the significant differences between the two kinds of hardness prints morphology

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threaded adaptors GH4169 nitrided layer another characteristic: in metallurgical microscope under on-site observation along the junction of permeability layer and the substrate of continuous white bright line rendering its morphological similarity in electric mirror scanning pictures nitrided layer and the substrate junction at presentation The white bright linear scanning electron microscope images shown in Figure 3. Further, by the metallographic hardness gradient test images can be observed to the the GH4169 carbonitriding layer and the substrate hardness gradient is very steep. 500 times magnification in Figure 4, the hardness of the imprint is located in both the junction appears large deformation, located on the substrate side imprint is too large, the hardness value of approximately 480HV0.01; located in the nitrided layer on the imprint is too small, the hardness value about 1000HV0.01. This shows that the junction is no more obvious transition layer, showing the same impression on the significant differences between the two kinds of hardness prints morphology. Gas valve suppli er