A kind of erosion-resistant copper alloy for marine working conditions and its preparation method

Abstract

The invention relates to the field of ocean engineering, and particularly discloses an erosion-resistant copper alloy utilized in an ocean working condition and a preparation method thereof. The copper alloy comprises the following elements by mass percent: 7% to 10% of Ni, 5% to 10.5% of Al, 0.15% to 1% of Fe, 0.5% to 1.5% of Mn, 0.15% to 1% of Ti, 0.05% to 0.15% of P, 0.2% to 0.6% of Mg and 0.005% to 0.01% of B, and the balance being copper. The preparation method comprises the steps of sequentially adding electrolytic copper, a covering agent, a CnMn intermediate alloy, a CuCo intermediate alloy, CuFe intermediate alloy, electrolytic nickel, pure chromium, electrolytic aluminium, pure silicon and the covering agent; and then, carrying out phosphor copper deoxidation, stirring slag salvaging, temperature increasing and discharging. The preparation method has the advantages that cost is low and efficiency is high, the copper alloy material has performance like sandy seawater erosion corrosion resistance, ocean organism corrosion resistance and seawater high-speed flow corrosion resistance, and the requirement of ocean engineering on corrosion-resistant and abrasion-resistant materials can be met.

Description

technical field [0001] The invention relates to the field of marine engineering and marine equipment, in particular to an erosion-resistant copper alloy for marine working conditions and a preparation method thereof. Background technique [0002] In marine engineering, since the pipelines of ship seawater system are in direct contact with seawater and are mostly arranged in the bilge, the working environment is harsh, and the problem of corrosion by seawater has always been a prominent problem restricting its maximum performance. In ships, pumps, valve bodies, pipes and blade propellers for marine pipeline installations have relatively high requirements for corrosion resistance. In the metal components in the marine environment, the failure types mainly include erosion wear, uniform corrosion, pitting corrosion, crevice corrosion, cavitation corrosion, etc. These failure types are often related to structural design, metallurgical factors and operating conditions. [0003] S...

AI Technical Summary

Problems solved by technology

However, serious erosion or erosion corrosion still occurs in sea areas with high sand content such as the East China Sea, which will cause significant erosion and corrosion aging to key parts such as propellers, pipeline elbows, seawater pump blades, and pipeline valve seats, seriously affecting The normal use of equipment reduces the ship's voyage rate and increases the hidden danger of accidents