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As experience indicated, a specificity of stainless steels, which allowed using in the shipbuilding field, is scoring and seizing on contact and thread surfaces during assembling with low tightening load 0.1 of yield stress instead required min 0.5. The cause leads to non-stabilized tightening of blade-hub joint or insufficient tightening. In this article the task of experimental investigation of behavior of metal covers for stainless steel pairs, which working with high contact loads, was defined.The goal of the investigation detect the extreme practice tightening load without scoring and seizing during assembling of propeller joints.The test subjectis covers of various materials coated on stainless base and a stability of shear of contacting surfaces was researched, because it’s proposed that coated material works as a hard-plastic greasing.Boundary magnitudes of loadsleadingto seizing of stainless steelswere discovered, covers and coating methods excluded seizing and working with high contact loads were defined, friction coefficients of covers coated on stainless steel with cool gas-dynamic spattermethod were detected. It was established, that most allowable cover for excluding scoring and seizing on contact surfaces of fixed elements of assembling propellers is aluminum cover coated with cool gas-dynamic spatter method, the maximum load on contact surface for the Al-cover is 380 MPa, the magnitude correspond to tightening with 0.55 of material yield stress. It’s confirmed, that copper cover may be used also instead aluminum.

vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s. o. makarova/vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s.o. makarova

INVESTIGATION OF BEHAVIOUR OF COVERS ON STAINLESS MATERIALS IN CONDITIONS OF HIGH CONTACT LOADS