Borodii Y. Increase of firmness of dividing stamps to the combined superficial strengthening.

Dissertation on the receipt of scientific degree of candidate of engineering sciences after speciality 05.03.05 are processes and machines of treatment pressure. A National technical university of Ukraine is the "Kyiv polytechnic institute". Kyiv, 2013. Dissertation work is sent to the increase of firmness of dividing stamps by the combined superficial strengthening, development of technologies of increase of firmness of cutting elements and heavily loaded details of machines. The first worked out method of the combined superficial strengthening of cutting elements of stamps and details of machines, that allows to manage quality of coverage. Undertaken complex studies of wearproofness of the combined coverages showed a considerable increase to wearproofness. Worked out methodologies and options for the combined strengthening, for model researches of wear of cutting edges of knives at cutting of wire, that allows to conduct the comparative tests of different strengthening coverages. Keywords: cutting elements, dividing stamps, felling, holing, combined superficial strengthening, electro-spark alloying, superficial flowage, firmness of stamps.