Welding wire flux core material having crack and air hole resisting performance, and welding wire having crack and air hole resisting performance and preparation method thereof

Abstract

The invention discloses a welding wire flux core material having crack and air hole resisting performance. The welding wire flux core material having the crack and air hole resisting performance consist of raw materials by following weight part: 30-40 parts of rutile, 8-12 parts of reduced titanium, 4-8 parts of fluorite, 3-5 parts of potassium feldspar, 1-2 parts of potassium fluoride, 3-6 partsof rare earth ferrosilicon, 3-5 parts of aluminum magnesium alloy, 3-5 parts of low-carbon ferromanganese, 1-3 parts of metal nickel, 2-3 parts of ferrotitanium, 3-6 parts of cerium oxide and 2-4 parts of bismuth titanate. The welding wire flux core material and a welding wire are suitable for welding of ceramic liners, have the good crack and air hole resisting performance, and can enable structure of deposited metal to obtain fine grain acicular ferrite structure excellent in crack resisting and air hole resisting performance. Meanwhile, weld joint grain structure is purified to obtain goodoxidation resistance and easily separate out the deposited metal impurities, and therefore the deposited metal is enabled to obtain excellent crack resisting and air hole resisting capacity. The welding wire flux core material and the welding wire solve the crack sensitivity and easy air hole generation puzzles which exist in the deposited metal and cannot be solved by common welding materials.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a welding wire flux core material with anti-crack and anti-porosity properties, a welding wire and a preparation method thereof. Background technique [0002] With the rapid development of China's shipbuilding industry, the construction of super-large ships not only brings great opportunities and challenges to expand the international market, but also brings challenges to shipbuilding materials. For this reason, high-strength and large-thickness steel plates are generally used in the hulls of large ships. In order to improve welding quality and welding efficiency, ceramic pad welding is generally used. Ceramic pad welding has excellent characteristics, after use, the weld seam is firm and the mechanical properties are stable. During the manufacturing process of the hull structure, there are often many welds at important stress-bearing nodes that require penetration te...

AI Technical Summary

Problems solved by technology

[0004] 2. Environment

[0006] However, due to the uneven quality of raw materials used in the production of ceramic liners, it is impossible to strictly control the content of impurities, especially the content of S and P, and the content of active ingredients cannot be guaranteed. Therefore, during the welding process of using ceramic liners, due to impurities Due to factors such as the existence of the active ingredient and the instability of the active ingredient, the weld is prone to cracks and pores, which affects the welding quality.