The Structure and Properties of Boride Coatings Depending on the Porosity of Powder Steel Preforms
Tóm tắt
Metallographic and X-ray diffraction analyses are used to examine the structure of boride coatings produced by saturation of iron and iron–carbon blanks with different porosities at 1000 and 1100°C and microhardness distribution along their depth is analyzed. It is shown that the thickness of the oxide layer increases with the original porosity of the blanks, but its density and surface microstructure is higher for samples with lower porosity produced at higher saturating temperatures. The morphology of boride layers depends on the porosity of the blanks.
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