A kind of low-nickel nitrogen-containing austenitic stainless steel electrode and preparation method thereof

Abstract

The invention discloses a low-nickel nitrogen-containing austenite stainless steel welding rod and a preparation method thereof, and belongs to the technical field of welding materials. The welding rod aims to solve the technical problem that in the prior art, when a conventional stainless steel welding rod is used for welding low-nickel nitrogen-containing austenite stainless steel joints, the anti-pitting ability is poor, and the low-temperature impact toughness is not high. The low-nickel nitrogen-containing austenite stainless steel welding rod comprises, by mass percentage, 0-0.04% of C,0-0.90% of Si, 5.00-8.00% of Mn, 0-0.025% of P, 0-0.020% of S, 17.00-20.00% of Cr, 2.00-3.00% of Ni, 0-0.75% of Mo, 0-0.75% of Cu, 0.10-0.30% of N and the balance Fe. The method includes the steps that firstly, marble, fluorite, cryolite, rutile, fluoride rare earth, alkali, atomized ferrosilicon, electrolytic metal manganese, nickel powder, titanium iron, metal chromium and iron powder are weighed according to the distribution ratio and mixed to obtain a coating; and secondly, the coating and potassium sodium silicate are evenly mixed, and a stainless steel welding core is coated with the mixture and subjected to low-temperature and high-temperature baking to obtain the low-nickel nitrogen-containing austenite stainless steel welding rod. The welding rod prepared through the method is excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a low-nickel nitrogen-containing austenitic stainless steel electrode and a preparation method thereof. Background technique [0002] Low-nickel-nitrogen-containing austenitic stainless steel mainly uses nitrogen to partially or even completely replace the alloying element nickel to obtain a single-phase austenite structure. The use of nitrogen for alloying has many advantages. For example, compared with carbon, nitrogen is more effective in solidifying Nitrogen is a strong austenite forming element, which can save nickel content and reduce the chance of ferrite and deformed martensite formation. Nitrogen can greatly improve the pitting resistance of materials ability. [0003] Low-nickel nitrogen-containing austenitic stainless steel has good plasticity, corrosion resistance, and high temperature resistance, and is widely used in industries such as ships, ...

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Problems solved by technology

[0005] The present invention provides a low-nickel nitrogen-containing austenitic stainless steel electrode and a low-nickel nitrogen-containing austenitic stainless steel electrode to solve the technical problems of poor pitting corrosion resistance and low low-temperature impact toughness of joints welded by conventional stainless steel electrodes. its preparation method

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