HIGH-PERFORMANCE METHOD OF CEMENTATION OF STEEL PARTS BY ELECTRO SPARK ALLOYING METHOD
Abstract
The article presents a new method of cementing steel parts by electrospark alloying (EIL), which allows to increase the productivity of the cementation process and the wear resistance of its surface layer. The method differs in that graphite powder is used as the anode material, and the cathode is a part made of low-carbon or medium-carbon alloy steel. Alloying with graphite powder is carried out with a capacity of 0.028-0.056 min/cm2, with variations in discharge energy in the range of 0.6-4.3 J. When used as a cathode material steel 12X18H10T formed a surface layer of high hardness with a thickness of 4-5 to 100-150 μm, and when alloying 40X steel with a capacity of 0.044 minutes/cm2 and a discharge energy of 2.8 J, the surface layer of high hardness has a thickness of more than 0.15 mm. The surface roughness (Ra) corresponds to 0.6-0.7 μm.
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