Low hexavalent chromium 316 austenitic stainless steel metal core welding wire and preparation method thereof

Abstract

The invention discloses a low hexavalent chromium 316 austenitic stainless steel metal core welding wire and a preparation method of the low hexavalent chromium 316 austenitic stainless steel metal core welding wire, and belongs to the field of welding material. Steel bands for the welding wire are low carbon steel bands with the following chemical components: carbon (C): 0.025-0.078 wt. %; silicon (Si): 0.06 wt. %; manganese (Mn): 0.33 wt. %; sulfur (S): <= 0.025 wt. %; and phosphorus (P): <= 0.03 wt. %. The chemical composition mass fraction of the welding wire powder includes: C: 0.025-0.078 wt. %; chromium (Cr): 48-57 wt. %; nickel (Ni): 28-33 wt. %; Mn: 4-6 wt. %; molybdenum (Mo): 2.8-5 wt. %; Si: 0.63-1.5 wt. %; titanium (Ti): 0.5-1 wt. %; zinc (Zn): 0.5-1 wt. %; zirconium (Zr): 0.5-1 wt. %; and ferrum (Fe): allowance. Compared with the prior art, the adopted steel bands are the low carbon steel bands, cost is reduced, at the same time welding dust content amount corresponds to that of a solid core welding wire, emission load of harmful Cr (VI) can be reduced by 20%-28% compared with the solid core welding wire, and welding electric arc is stable, spatter is small, weld forming appearance is attractive, and deposited metal is excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a low hexavalent chromium (Cr(VI)) gas-shielded 316 austenitic stainless steel metal-cored welding wire. Background technique [0002] Nowadays, health and environmental protection are more and more concerned, and there is an urgent need for less harmful welding materials. Cr(VI) in welding fume is a by-product of welding fume, which is carcinogenic in the human body and can cause many other health problems. For example, inhalation of certain higher concentrations of hexavalent chromium compounds can cause runny nose, sneezing, Itching, nosebleeds, ulcers, and perforated nasal septum. Short-term high-dose exposure can produce adverse effects at the site of exposure, including ulcers, irritation of the nasal mucosa, and perforation of the nasal septum. Ingestion of very large doses can cause kidney and liver damage, nausea, gastrointestinal irritation, stomach ulcers, co...

AI Technical Summary

Problems solved by technology

However, the processing technology of solid core wire is relatively complicated and the cost is relatively high, and the alloy cannot be adjusted.

Due to the high price of stainless steel, the cost of welding materials with stainless steel as the outer skin has increased significantly

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