FIELD: engines and pumps.
SUBSTANCE: invention can be used in engine building. Outlet valve (1) is intended to be used in an internal combustion engine. Outlet valve (1) includes stem (14) and valve disk (11) on the lower end of stem (14). Upper surface of valve disk (11) has mounting chamfer (10). Valve disk (11) is made from basic material; the mounting chamfer consists of material of the mounting chamfer, which differs from basic material. Material of the mounting chamfer represents an alloy on the basis of nickel. An alloy, with specification of a composition in percent by weight and without considering any common impurities and inevitable residual amounts of components of deoxidising agents, contains Cr at least 34.0 to 44.0%, total amount of Nb and Ta in the range of at least 2.8 to 6.1%, 0.3 to 2.0% Ti, not more than 0.2% Al, not more than 0.04% B, not more than 0.8% Fe, not more than 0.04% C, not more than 0.4% Si and Ni is the rest, where the amount of Ti+Nb+0.5×Ta varies in the range of 3.4 to 6.6%, with that, the amount of Nb+0.5×Ta is less than 3.0% if the amount of Ti is more than 1.5%. The invention describes a manufacturing method of the outlet valve.
EFFECT: improvement of mechanical properties of a valve in combination with increase of stability to high-temperature corrosion.
16 cl, 4 tbl, 7 dwg
