No abstract

621.793Operation of coatings based on tialite, γ-TiAl, titanium aluminides with discrete inclusions of TiN and also alloys based on cobalt, nickel, and titanium in friction pairs with polyethylene grade "Chirulen" and stainless steel 12Kh18N10T is studied. It is established that tialite coatings formed from nanostructure powders of Ti − Al by detonation deposition are the best for operation under dry friction conditions in a pair with stainless steel 12Kh18N10T (minimum friction coefficient and minimum wear of the contact surfaces). It is shown that in the sliding rate range selected effective operation of material in friction pairs with polymer is provided due to transfer it to the contact surface and formation between rubbing surfaces of a thin film fulfilling the function of a solid lubricant. It is established that stable operation with the minimum wear in a friction pair with polyethylene grade "Chirulen" is provided by a coating of γ-TiAl and Al 2 TiO 5 , and also coatings based on titanium aluminide with fine TiN inclusions.

Minimization of melt contamination of heat-resistant alloys from the excess content of harmful impurities, non-metallic inclusions during crystallization in the production of parts of gas turbine engines provides the authors microanalloy alloys with lanthanum for followed by the use of refining