| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to machine building, particularly, to working wheel parts used in liquid-propellant rocket engine fuel systems. Proposed working wheel is composed a disc. Proposed method comprises casting ingot from refractory alloy, making pellets from said ingot, filling said pellets in vacuum into capsule shaped to a disc, sealing said capsule, hot isostatic pressing of blank with holding, depressurising and lathing said capsule to make the part of required geometry. Ingot is cast from refractory titanium alloy containing the following elements in wt %: aluminium - 5.0-7.5, zirconium - 3.0-5.0, tungsten - 0.5-7.5, hafnium - 0.005-0.2, titanium making the rest. Pellets are shaped to 40-300 mcm-dia spheres. Said hot isostatic pressing is executed in gasostatic extruder at P=150-160 MPa, T=920±10°C, while holding is carried out for 2.5-3.5 hours.EFFECT: higher strength and creep resistance, high heat resistance at working temperatures of up to 750°C.2 cl, 1 tbl |
