Superaustenitic stainless steel electrode

Abstract

The invention provides a superaustenitic stainless steel electrode. A coating of the superaustenitic stainless steel electrode at least comprises the following components, by mass, 35 to 45 percent of rutile, 2 to 5 percent of titanium dioxide, 6 to 12 percent of marble, 6 to 12 percent of dolomite, 1 to 3 percent of quartz, 3.5 to 6.5 percent of cryolite, 4 to 8 percent of dehydrated feldspar, 3 to 5 percent of dehydrated phlogopite, 6 to 8 percent of chromium metal, 6 to 8 percent of electrolytic manganese, 3 to 6 percent of ferrotitanium, 1 to 2 percent of chromium oxide green, 2 to 4 percent of nickel powder, 0.5 to 1.5 percent of ferromolybdenum and 0.5 to 1.5 percent of sodium alginate. The coating of the superaustenitic stainless steel electrode is formed by mixing all the components according to the proportions, potassium and sodium are added to be mixed with sodium silicate, and the coating coats a core wire H02Cr20Ni25Mo4Cu to form the electrode. Carbon content is extremely low, comprehensive corrosion of sulfuric acid and phosphoric acid can be resisted, the corrosion of acetic acid at any temperature and in any concentration under ordinary pressure can be resisted, and an ideal welding material is provided for steel for manufacturing various strong acid storing and transporting containers.

Description

technical field [0001] The invention relates to a super austenitic stainless steel welding rod, which belongs to the field of welding materials. Background technique [0002] Austenitic stainless steel has been continuously developed in different ways according to various technical requirements and production capacity at that time. An important driving force for the development of austenitic stainless steel is the user's demand for materials that can resist increasingly harsh environments. In the early days, people added molybdenum and silicon to increase the resistance of stainless steel to various acid corrosion. A special medium that led to the development of high-alloyed stainless steels in the 1930s was sulfuric acid. In France and Sweden, an alloy containing 20% ​​chromium, 25% nickel, 4.5% molybdenum and 1.5% copper was developed and named UranusB6 or 904L. In the late 1980s, 00Cr20Ni25Mo4.5Cu (equivalent to ASTM N08904EN1.4539) was developed in China. Since the 1...

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Problems solved by technology

[0004] The super austenitic stainless steel electrodes in the prior art often have the following disadvantages: large carbon content, lack of corrosion resistance, poor resistance to sulfuric acid and phosphoric acid; under normal pressure, they cannot withstand the corrosion of any temperature and any concentration of acetic acid ; The pitting corrosion, pitting corrosion, crevice corrosion, stress corrosion and other problems of halides have not been solved; when welding, it is easy to cause spatter and difficult to remove slag; the resistance of the electrode is limited

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