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A kind of austenitic stainless steel flux-cored welding wire resistant to non-oxidative acid corrosion and its application

A technology of austenitic stainless steel and non-oxidizing acid, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve problems such as inconsistent chemical composition, insufficient corrosion resistance, etc., and achieve improved moisture absorption resistance , Improve quality stability and anti-porosity ability, improve the effect of mechanical properties

Active Publication Date: 2021-03-26
WUHAN TEMO WELDING CONSUMABLES CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the inconsistencies in chemical composition and insufficient corrosion resistance that occur when existing Cr-Ni-Mo-Cu-N series austenitic stainless steels are welded with existing austenitic stainless steel flux-cored welding wire products in the application process question

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  • A kind of austenitic stainless steel flux-cored welding wire resistant to non-oxidative acid corrosion and its application

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Embodiment Construction

[0025] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The invention provides an austenitic stainless steel flux-cored welding wire resistant to non-oxidative acid corrosion, which includes a stainless steel sheath and a medicine powder filled in the stainless steel sheath. The components and contents of the medicine powder account for the mass percentage of the medicine powder as follows: 20-25%; quartz sand 2-5%; metal chromium 19-22%; nickel powder 23-27%; molybdenum powder 9-11%; copper powder 6-8%; electrolytic manganese 2-4%; nitrogen-manganese alloy 3~5%; sintering agent 4...

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Abstract

The invention provides an austenitic stainless steel flux-cored wire resistant to non-oxidizing acid corrosion. The austenitic stainless steel flux-cored wire includes a stainless steel shell and powder arranged in the stainless steel shell in a filled mode. The powder is prepared from the components in percentage by mass: 20-25% of natural rutile, 2-5% of quartz sand, 19-22% of chromium metal, 23-27% of nickel powder, 9-11% of molybdenum powder, 6-8% of copper powder, 2-4% of electrolytic manganese, 3-5% of manganese-nitrogen alloy, and 4-6% of an agglutinant. According to the austenitic stainless steel flux-cored wire, the burning loss of part alloy elements like Cr, Ni, and Mo can be supplied through the powder, and at the same time, the alloy elements like Si and Mn, and Cu and N, canbe transited. By controlling the contents of various powder in the flux-cored wire and controlling the contents and proportions of alloy elements in deposited metal of the flux-cored wire, the chemical component stability of flux-cored wire deposited metal is ensured, and the problems that chemical compositions are not fit and corrosion resistance is not enough when traditional austenitic stainless steel flux-cored wires sold in the market are used for welding novel Cr-Ni-Mo-Cu-N series acid resistance austenitic stainless steel are solved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to an austenitic stainless steel flux-cored welding wire resistant to non-oxidative acid corrosion and its application. Background technique [0002] Stainless steel has strong corrosion resistance in neutral or weak oxidizing acid environment, but it will appear different degrees of corrosion in the environment containing non-oxidizing acid, strong oxidizing acid or chloride. Therefore, acid-resistant stainless steel and its welding materials must be developed according to the environment in which they are used. At present, for various acid solution environments in the chemical industry, austenitic stainless steel is mainly used to manufacture various acid-resistant equipment. However, in the fields of chemicals, fertilizers, fibers, pulp, etc., for non-oxidizing acids such as sulfuric acid, acetic acid, and acetic acid, it is necessary to continuously increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/0266B23K35/3066B23K35/3608B23K35/368
Inventor 宋昌宝王玲艳刘东
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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