Flux-cored wire for cargo oil tank of oil tanker

Abstract

The invention relates to a flux-cored wire for a cargo oil tank of an oil tanker and belongs to the technical field of flux-cored wires. The flux-cored wire can be full of titanium type powder, titanium calcium type powder or alkaline powder. Deposited metal of the flux-cored wire contains the following components in percentage by mass: 0.01-0.2 percent of C, 0.1-1.5 percent of Si, 0.5-2.5 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.012 percent of S, 0.01-2.5 percent of Ni, 0.01-1 percent of Cu, 0.01-0.5 percent of Ti, more than or equal to 0 but less than to equal to 1 percent of Cr, more than or equal to 0 but less than or equal to 1 percent of Mo, more than or equal to 0 but less than to equal to 1 percent of W, more than or equal to 0 but less than to equal to 0.1 percent of B, more than or equal to 0 but less than to equal to 0.1 percent of Re and more than or equal to 0 but less than to equal to 0.1 percent of Al, and the balance Fe and other inevitable impurities. According to the demands, the deposited metal of the flux-cored wire can also contain at least one of the following components in percentage by mass: more than 0 but less than or equal to 0.3 percent of Sb, more than 0 but less than or equal to 0.3 percent of Sn, more than 0 but less than or equal to 0.3 percent of As, more than 0 but less than or equal to 0.3 percent of Se and more than 0 but less than or equal to 0.3 percent of Pb. The flux-cored wire has the advantage that after welding, the wire has good uniform corrosion resistance and pitting corrosion resistance without antiseptic treatment, so that the overall corrosion resistance of the oil tanker is improved.

Description

technical field [0001] The invention belongs to the technical field of flux-cored welding wires, and in particular relates to a flux-cored welding wire for cargo oil tanks of oil tankers. The weld seams obtained after welding do not need anti-corrosion treatment, and have excellent corrosion resistance in the corrosive environment of crude oil. At the same time, the weld also has good mechanical properties. Background technique [0002] When the cargo oil tank of an oil tanker is filled with crude oil, the cargo oil tank is in an extremely complex and harsh corrosive environment. The first is uniform corrosion on the inner and upper decks of cargo oil tanks. During the transportation of crude oil, the cargo oil tank is filled with explosion-proof gas (5% O 2 +13% CO 2 +0.01% SO 2 +0.1%H 2 S+bal N 2 ), under the alternation of day and night, the temperature and humidity in the cargo oil tank of the tanker change, and water droplets will condense on the upper deck. Due ...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a flux-cored welding wire for the cargo oil tank of an oil tanker, which solves the corrosion problem in the special corrosion environment in the cargo oil tank of the oil tanker

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