High-toughness stainless steel welding rod used in ultralow-temperature environment and preparation method of high-toughness stainless steel welding rod

Abstract

The invention belongs to the technical field of welding materials, and particularly relates to a high-toughness stainless steel welding rod used in an ultralow-temperature environment and a preparation method thereof.The high-toughness stainless steel welding rod used in the ultralow-temperature environment comprises a welding core and a coating adhering to the outer wall of the welding core; the coating is mainly prepared from, by weight, 25%-30% of rutile, 10%-15% of iron powder, 10%-15% of feldspar, 10%-15% of fluorite, 5%-10% of chromium powder, 5%-10% of nickel powder, 5%-10% of marble, 2%-5% of electrolytic manganese metal, 2%-5% of molybdenum powder, 2%-5% of mica, 2%-5% of titanium dioxide, 1%-4% of cryolite, 1%-4% of ferrotitanium and 1%-2% of sodium carbonate. The invention provides a high-toughness E316L-16 stainless steel welding rod used in an ultralow-temperature environment. The high-toughness E316L-16 stainless steel welding rod has a certain ferrite number and excellent low-temperature impact toughness.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a high-toughness stainless steel welding rod used in an ultra-low temperature environment and a preparation method thereof. Background technique [0002] current technology: [0003] Austenitic stainless steel with a face-centered cubic crystal structure has become one of the recognized ultra-low temperature structural materials due to its good low-temperature comprehensive performance, and is widely used in coiled tube heat exchangers, liquefied natural gas and other cryogenic storage and transportation containers and special In the working condition of low temperature service environment. However, studies have shown that due to the complex metallurgical process, the overall performance of the weld metal is far inferior to that of the base metal, especially the low-temperature impact toughness (-196°C) of the weld after manual arc welding with titanium-cal...

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Problems solved by technology

Excessively reducing the ferrite content will inev

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