Cailiao Baohu (Apr 2023)
Improvement of Wear Resistance and Engineering Application of Titanium Alloy Actuation Components
Abstract
In order to improve the surface hardness of titanium alloy and enhance its wear resistance to satisfy the requirements of weight reduction and high temperature resistance of the new generation of aviation actuation system components，the processes of titanium alloy chemical nickel-plating and stainless steel CMT (cold metal transition welding technology) cladding SCu6180 (aluminum bronze) was studied.And the wear-resistance of the friction pairs with different strengthening states was tested by ring-block friction and wear test under simulated working conditions.Results showed that when low-pressure blowing fine sand+hydrofluoric acid activation was adopted as the pre-treatment，the chemical nickel-plating layer had good adhesion.After a heat treatment at 399 ℃in vacuum furnace，the hardness could reach 906 HV1 N，the friction coefficient between the chemical nickle-plating layer and stainless steel friction pair decreased from 0.79 to 0.32，the friction coefficient between the chemical nickle-plating layer and the stainless steel friction pair with surface cladding SCu6180 anti-friction coating was only 0.12，and the wear amount was reduced by two orders of magnitude.Besides，the engineering application of engine vector actuation components was realized.
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