Marine propeller and multi-alloy composite manufacturing method thereof

Abstract

The invention discloses a multi-alloy composite manufacturing method for a marine propeller. The method integrates the performance advantages of various materials, adopts two or more alloy materials to compositely manufacture the propeller, and comprises the following steps: firstly, carrying out mechanism research aiming at the problems that the marine propeller is easily influenced by factors such as seawater, marine organisms and cavitation bubbles to corrode, the structural precision is reduced, the noise is increased and the like; and then based on modern advanced manufacturing technologies such as additive manufacturing, high-energy beam welding or cladding capable of achieving free manufacturing, conducting profile synergistic and lightweight design on the base body structure, the overall profile and the like of the propeller. The base body structure can be made of relatively cheap materials such as high-strength alloy steel with the yield strength higher than 600 MPa, and only the surface layer is wrapped with copper alloy with good corrosion resistance. In this way, the purpose of light weight can be achieved by depending on the high-strength thinned paddle of the steel, the paddle can have the excellent corrosion resistance of the copper alloy, and meanwhile, the technologies of integral casting, heat treatment and the like of the steel are mature, and the process difficulty and cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of marine propeller manufacturing, and in particular relates to a marine propeller and a multi-alloy composite manufacturing method thereof. Background technique [0002] The shipbuilding industry is not only an important economic industry of the country, but also an important field related to the national territorial security, which has very important strategic significance. Submarines, aircraft carriers, and large cruise ships are all national heavyweights. As the source of power for these giant ocean beasts—the diameter of the propeller has grown from 1-6 meters to more than 10 meters, the material consumption is huge, and the structural shape is becoming more and more complicated. Manufacturing costs are high. However, the propeller works in the marine environment and has been eroded by seawater, marine organisms, cavitation and other factors for a long time. The surface is easily corroded, the structur...

AI Technical Summary

Problems solved by technology

The marine propeller and the multi-alloy composite manufacturing method proposed by the present invention combine the performance advantages of various materials, and use two or more alloy materials to manufacture the propeller. First, the marine propeller is susceptible to corrosion by seawater, marine organisms, cavitation and other factors. , structural precision reduction, noise increase and other issues to carry out mechanism research, and then based on modern advanced manufacturing technologies such as additive manufacturing, high energy beam welding or cladding that can realize free manufacturing, the base structure and overall profile of the propeller are augmented. efficient and lightweight design

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