THERMOMECHANICAL PROCESSING OF NICKEL-TITANIUM ALLOYS

摘要

FIELD: metallurgy.;SUBSTANCE: manufacturing method of the nickel-titanium rolled product involves hot forging of the ingot at the temperature greater than or equal to 500°C with producing the billet, hot rod rolling of the billet at the temperature greater than or equal to 500°C to produce the blank, cold drawing of the blank at the temperature of less than 500°C with producing the bar and hot isostatic pressing (HIP) for at least 0.25 hours in the HIP furnace, operating at the temperature in the range from 700°C to 1,000°C and pressure in the range from 3,000 pounds per sq. inch (20.7 MPa) up to 50,000 pounds per sq. inch (344.7 MPa).;EFFECT: density of non-metallic inclusions per unit area decreases, which ensures the high surface quality, and high fatigue life of the product.;27 cl, 8 dwg, 10 tbl, 5 ex