Seamless self-protection flux-cored wire for low-nitrogen non-magnetic naval vessel steel welding

A technology of flux-cored welding wire and self-protection, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problem that it is difficult to realize all-position repair, which must be carried out in the factory building, and there is no disclosure of self-protection flux-cored welding wire Reporting and other problems, to achieve the effect of excellent welding process performance, fast solidification speed and stable arc
CN112404795AActive Publication Date: 2021-02-26WUHAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Publication Date
2021-02-26
Patent Text Reader

Abstract

The invention relates to a seamless self-protection flux-cored wire for low-nitrogen non-magnetic naval vessel steel welding. According to the technical scheme, the seamless self-protection flux-coredwire is composed of 70 wt%-80 wt% of a stainless steel strip and 20 wt%-30 wt% of flux-cored powder, and the stainless steel strip is filled with the flux-cored powder. The stainless steel strip comprises the following chemical components of, in percentage by weight, 0.03-0.08 wt% of C, less than or equal to 1wt% of Si, less than or equal to 2 wt% of Mn, 18-20 wt% of Cr, 8-11 wt% of Ni, less thanor equal to 0.03 wt% of S, less than or equal to 0.03 wt% of P and the balance Fe and inevitable impurities. The flux-cored powder comprises the following chemical components of, in percentage by weight, 40-43 wt% of barium fluoride, 5-8 wt% of marble, 8-10 wt% of aluminum powder, 2-4 wt% of silicon powder, 7-10 wt% of manganese powder, 2-5 wt% of manganese nitride, 10-13 wt% of nickel powder, 5-7 wt% of chromium powder and the balance iron powder. According to the seamless self-protection flux-cored wire, weld metal formed by welding the low-nitrogen non-magnetic naval vessel steel is high in strength, good in ductility and toughness, non-magnetic and excellent in seawater corrosion resistance.
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Description

technical field

[0001] The invention belongs to the technical field of seamless self-protecting flux-cored welding wire. In particular, it relates to a seamless self-shielded flux-cored welding wire for welding low-nitrogen and non-magnetic naval steel. Background technique

[0002] 917 non-magnetic steel is a non-magnetic steel with Mn-Al composition developed in my country in the 1960s and 1970s. It is the main steel used in shipbuilding. Its carbon content and alloy composition are relatively high, and it belongs to a completely non-magnetic single-phase austenite structure. Carbon steel. With the gradual development of ships with large displacement, large tonnage and deep sea, new requirements are put forward for the strength and corrosion resistance of steel used for hull structures. Although the comprehensive performance of 917 steel is good, although it can meet the design and use requirements of various ships for many years, the actual value of the yield strength is...

Claims

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