Two-phase stainless steel welding electrode and manufacturing method thereof

A technology of duplex stainless steel and electric welding rod, applied in the direction of manufacturing tools, welding medium, welding equipment, etc., can solve the problems of difficulty in taking into account mechanical properties and welding manufacturability at the same time, and achieve good slag removal, beautiful weld formation, and mechanical properties. and high corrosion resistance

Inactive Publication Date: 2012-06-27
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] It can be seen from the above that the current coating types of duplex stainless steel electrodes are mostly alkaline type and titanic acid type, but it is difficult to balance the mechanical properties and welding processability of the

Method used

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  • Two-phase stainless steel welding electrode and manufacturing method thereof
  • Two-phase stainless steel welding electrode and manufacturing method thereof
  • Two-phase stainless steel welding electrode and manufacturing method thereof

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the examples.

[0026] Composition according to the drug skin of proportioning that the present invention adopts, has made A, B, C three groups of welding electrodes, specifically as follows:

[0027] Raw material ratio of welding rod:

[0028]

[0029] Weigh the above-mentioned coating components of the three proportions of A, B, and C respectively, and after mixing, add potassium-type water glass accounting for 20% to 22% of the total weight of the coating, with a pomi degree of 43°, and stir evenly , coated on the outside of the welding core, pressed by a hydraulic press, and then dried at 350°C for 2 hours at a high temperature to obtain three kinds of welding electrodes A, B, and C.

[0030] The ferrochrome is selected as FeCr65C0.03 conforming to GB5683-2008, and its chemical composition is as follows: Cr≥60.0wt%, Si≤1.0wt%, S≤0.025wt%, P≤0.03wt%, C≤0.03wt%.

[0031] The nickel powder...

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Abstract

The invention belongs to the field of welding materials, and relates to a two-phase stainless steel welding electrode and a manufacturing method thereof, wherein coating components of the welding electrode comprise 10-15% of marble, 5-10% of potassium feldspar, 1-5% of aluminum oxide, 1-5% of synthetic mica, 2-4% of chrome oxide green, 1-2% of chromium nitride, 20-25% of metallic powder, 5-10% offluorite and 1-3% of sodium carbonate by mass, and a matrix is rutile. The manufacturing method includes the steps of weighing the coating with the components, adding in potassium type sodium silicate accounting for 20-22% of the total weight of the coating and having the baume degree of 43 degrees, evenly mixing, pressing through an oil press, and then roasting at the high temperature of 350 DEGC for two hours. The welding electrode is good in welding process, attractive in formed welding joints, good in slag detachability, and high in mechanical property and anti-corrosion property when the welding current is 160A and the voltage is 30-34V.

Description

technical field [0001] The invention belongs to the field of welding materials, and relates to a duplex stainless steel welding electrode, which is mainly used for welding 2205 duplex stainless steel, and can be widely used in marine engineering construction, petroleum and chemical industry equipment manufacturing. Background technique [0002] Because duplex stainless steel has the advantages of high strength and chloride stress corrosion resistance of ferritic stainless steel and excellent toughness and weldability of austenitic stainless steel. At present, duplex stainless steel has been widely used in petroleum, chemical industry, natural gas high-pressure system, seawater treatment, atomic energy industry, chemical transportation ship and other industries. [0003] At present, duplex stainless steel welding electrodes at home and abroad are roughly divided into basic type, titanium calcium type and titanic acid type according to the coating type. Among them, the basic ...

Claims

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Application Information

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IPC IPC(8): B23K35/365B23K35/40
Inventor 卢军华
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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