Abstract
Innovative technological principles for manufacturing of solid ceramic end mills, including spark-plasma sintering of ceramic workpiece based on compositions α/β-SiAlON with additives of 10 and 20 % titanium nitride, subsequent forming abrasive blasting and deposition of antifriction wear-resistant coatings of three compositions TiN—Al/TiN, TiN—AlTiN/SiN and CrTiN—AlTiN—AlTiCrN/SiN are developed and tested. Rational modes of sintering are established for powder compositions, and the composition of 80 % (90α + 10β) and 20 % TiN is recommended as the most wear-resistant composition for ceramic milling tools. The role of coatings in increasing of durability of ceramic tool during milling of INCONEL 718 nickel alloy is assessed. It is shown that TiN— AlTiN/SiN coating provides 1.7 times higher resistance of ceramic milling cutters in comparison with uncoated tools
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