Metal powder-cored type nitrogen austenite stainless steel flux-cored wire and method for manufacturing same

A technology of austenitic stainless steel and metal powder core, applied in metal processing equipment, welding equipment, welding medium, etc., can solve the problems of mechanical properties, impact resistance and corrosion resistance, loss and other problems, and achieve the effect of corrosion resistance Good, small smoke and dust, reasonable ratio effect

Active Publication Date: 2013-04-17
北方材料科学与工程研究院有限公司 +2
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Problems solved by technology

[0006] The high-nitrogen steel (HNS) material system is different from other steel types currently in use. The high nitrogen content of high-nitrogen steel makes its weldability different from other medium-carbon low-alloy steels. The most essential problem in welding high-nitrogen steel is to avoid nitrogen The loss of nitrogen to ensure the nitrogen content of the deposited metal, the loss of nitrogen will cause the decline of mechanical properties, impact resistance and corrosion resistance

Method used

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  • Metal powder-cored type nitrogen austenite stainless steel flux-cored wire and method for manufacturing same
  • Metal powder-cored type nitrogen austenite stainless steel flux-cored wire and method for manufacturing same
  • Metal powder-cored type nitrogen austenite stainless steel flux-cored wire and method for manufacturing same

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Embodiment Construction

[0033] Below in conjunction with embodiment the present invention is described in further detail.

[0034] 1. Preparation of metal powder cored nitrogen-containing austenitic stainless steel flux cored wire

[0035] 1. Weigh the powders used to prepare the drug core according to the formula in Table 1, and each component passes through an 80-mesh standard sieve, and mix the weighed powders evenly, and set aside;

[0036] 2. The low-carbon steel strip is pressed into a trough-shaped structure by a forming machine; the following embodiments all use the low-carbon steel strip of the brand SYHS, the thickness of the steel strip is 0.3mm, and the width is 8.25mm. The content of each element in the steel strip is C≤0.050%, Mn≤0.200%, Si≤0.010%, S≤0.010%, P≤0.020%, Fe balance.

[0037] 3. Put the evenly mixed drug material into the tank pressed by the steel belt. The filling rate, that is, the percentage of the weight of the powder to the weight of the welding wire is 40-50%; Seal ...

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Abstract

The invention relates to a metal powder-cored type nitrogen austenite stainless steel flux-cored wire and a method for manufacturing the same. The metal powder-cored type nitrogen austenite stainless steel flux-cored wire comprise a carbon steel cored shell and powder filled in the shell, and is characterized in that the powder comprises, by weight, from 35% to 45% of metal chromium, from 15% to 25% of nickel powder, from 3% to 6% of ferrochromium nitride, from 10% to 15% of silicon-magnesium alloy, from 2% to 8% of molybdenum powder, from 0.5% to 2.5% of ferrotitanium powder, from 0.5% to 1% of potassium carbonate arc stabilizers, from 0.5% to 1% of aluminum-magnesium powder, from 0.5% to 1% of bismuth oxide, from 0.3% to 0.5% of sodium oxide, from 0.01% to 0.1% of rare-earth cerium and from 1% to 10% of iron powder, and the weight of the powder ranges from 40% to 50% of the total weight of the wire. Compared with the prior art, the metal powder-cored type nitrogen austenite stainless steel flux-cored wire has the advantages that weld metal has excellent mechanical properties such as good toughness and high strength after the wire is applied to welding high-nitrogen steel, and a corrosion resistant effect is good.

Description

technical field [0001] The invention relates to the technical field of stainless steel welding materials, in particular to a metal powder-cored austenitic stainless steel flux-cored wire and its preparation. Background technique [0002] Stainless steel welding methods generally include electrode arc welding, tungsten inert gas shielded welding, submerged arc welding, etc. Stainless steel flux-cored wire welding is a revolution in stainless steel welding, and the development and application of stainless steel flux-cored wire has accelerated the progress of this revolution. Active gas shielded welding of stainless steel flux cored wire and carbon steel CO 2 Same as welding, semi-automatic and automatic welding have the characteristics of high efficiency and simple operation. Therefore, it is widely used in ships, bridges, pressure vessels, petrochemical and other fields. [0003] At present, the flux-cored welding wires on the market are basically slag-type welding wires, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/32
Inventor 明珠都建国王有祁陈东高刘燕林王东马冰王法科
Owner 北方材料科学与工程研究院有限公司
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