| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: invention relates to engine building and can be used in piston-type aircraft and automotive ICEs. The proposed ICE exhaust valve comprises a stem with a tip, an umbrella-like heat with stiffening ribs, their number not exceeding eight. Note that the rib has a chamfer to horizontal surface not exceeding 20°. The valve is cast in vacuum in heated ceramic molds with the further thermal treatment in the protective gas atmosphere at 1200°+20°C for, at least, 4.5 hours, mechanically processed and coated thereafter. The invention comprises the alloy composition used in the valve production. ^ EFFECT: ease of manufacture, better manufacturability, smaller labour input, higher valve reliability, wear resistance, longer life, optimum weight. ^ 3 cl |
