Electric arc welding electrode for ultralow-temperature high manganese steel

Abstract

The invention relates to the technical field of welding materials, in particular to an electric arc welding rod for ultralow-temperature high manganese steel. The welding rod comprises a welding rod steel core and a coating wrapping the welding rod steel core, wherein the welding rod steel core comprises, by weight, 0.35%-0.46% of C, 0.06%-0.18% of Si, 22%-30% of Mn, 3.7%-4.6% of Cr, 1.8%-2.5% of Ni, 1.3%-2.1% of Mo, smaller than or equal to 0.015% of S, smaller than or equal to 0.015% of P and the balance Fe and inevitable impurities, water glass serves as a binding agent, the coating accounts for 35%-40% of the total weight of the welding rod, existing welding rod production equipment and an existing welding rod production method are adopted for preparation; the coating comprises, by mass, 20%-30% of marble, 5%-10% of strontium carbonate, 18%-25% of fluorite, 3%-6% of zircon sand, 4%-8% of rutile, 3%-5% of ferrotitanium, 3%-8% of magnetite, 4%-8% of manganese metal, 4%-6% of chromium metal, 6%-10% of nickel metal, 2%-4% of molybdenum metal, 2%-3% of copper powder, 1%-3% of ferrovanadium, 4%-7% of nitrided ferrochromium, 0.5%-1% of graphite, 0.3%-1% of sodium carbonate, and 0.3-1% of seaweed. The welding rod has good ultralow-temperature impact toughness, excellent welding process performance and excellent all-position welding operation performance.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to an arc welding electrode for ultra-low temperature high manganese steel. Background technique [0002] With the development of modern industry, more and more energy consumption in the world is concentrated on gaseous energy, especially natural gas. Natural gas is a convenient and efficient clean energy. The natural gas resources in the world are abundant, with reserves of about 400-600 trillion m 3 . However, natural gas is generally stored away from major consumption areas, making the storage and long-distance transportation of a large amount of natural gas an urgent problem to be solved. If natural gas is made into a liquid state, the volume can be reduced by 600 times, which can greatly reduce the storage and transportation costs of natural gas. The liquefaction temperature of natural gas is -162°C. LNG ships transporting natural gas and storage tanks for storing ...

AI Technical Summary

Problems solved by technology

At present, there is no suitable welding material for welding ultra-low temperature high manganese steel, which makes the promotion and application of ultra-low temperature high manganese steel a bottleneck

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