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Two phase stainless steel welding rod

A technology of duplex stainless steel and welding electrodes, which is applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of high price, environmental pollution of on-site welding work, and poor welding process performance of welding electrodes, etc., to achieve Low manufacturing cost, excellent welding process performance, and good slag removal effect

Inactive Publication Date: 2011-04-20
上海狮百盛焊材科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Through literature retrieval to existing duplex stainless steel, it is found that CN101323058A and CN101367161A patents are used for duplex stainless steel welding electrodes. Such as nickel powder, metal chromium and metal manganese, etc., and even a certain amount of rare earth components, making it expensive, and adding too much metal powder will make the welding process performance of the electrode worse, and at the same time, it will cause damage to the welding work environment on site. pollution
Through the above search, it is found that there is no economical and environmentally friendly electrode with excellent mechanical properties, pitting resistance, and stress corrosion resistance.

Method used

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Embodiment 1

[0015] The welding electrode coating in this embodiment is composed of the following components in percentage by weight: 35% calcium oxide, 20% calcium fluoride, 8% titanium dioxide, 9% silicon dioxide, 8% ferrosilicon, medium carbon manganese 3% iron, 4% ferromolybdenum, 4% ferrochromium nitride, 4% potassium oxide, 4% sodium oxide and 1% nickel, mix the above components evenly and add water glass accounting for 16% of the total weight of the coating As a binder, the mixture is coated on the welding wire, then pressed by a hydraulic welding rod coating machine, dried at a low temperature of 150°C for 1 hour, and then dried at a high temperature of 350°C for 0.5 hours.

Embodiment 2

[0017] The welding electrode coating in this embodiment is composed of the following components in percentage by weight: 40% calcium oxide, 18% calcium fluoride, 6% titanium dioxide, 8% silicon dioxide, 6% ferrosilicon, medium carbon manganese 4% iron, 4% ferromolybdenum, 4% ferrochromium nitride, 4% potassium oxide, 5% sodium oxide and 1% nickel. Mix the above components evenly and add 18% water glass to the total weight of the coating As a binder, the mixture is coated on the outside of the welding wire, then pressed by a hydraulic welding rod coating machine, dried at a low temperature of 150°C for 1 hour, and then dried at a high temperature of 360°C for 0.5 hours.

Embodiment 3

[0019] The electrode coating in this embodiment is made up of the following components in percentage by weight: 45% of calcium oxide, 15% of calcium fluoride, 5% of titanium dioxide, 7% of silicon dioxide, 7% of ferrosilicon, 4% of ferromanganese %, ferromolybdenum 3%, ferrochrome nitride 3%, potassium oxide 5%, sodium oxide 4% and nickel 2%, after mixing the above components evenly, add water glass accounting for 17% of the total weight of the coating as a binder As a binder, coat the mixture on the outside of the welding wire, then press it through a hydraulic welding rod coating machine, dry it at a low temperature of 150°C for 1 hour, and then dry it at a high temperature of 380°C for 0.5 hours.

[0020] The weight percent of the deposited metal components of the electrode is: carbon ≤ 0.06%, manganese ≤ 2.0%, silicon ≤ 1.0%, sulfur ≤ 0.030%, phosphorus ≤ 0.030%, chromium 24.0-27.0%, nickel 5.5-8.5% , molybdenum 2.0-3.5%, nitrogen 0.10-0.30%, and the rest is iron. Embodim...

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Abstract

The invention discloses a two phase stainless steel welding rod which comprises a solder wire and a coating, wherein the coating comprises the following components in percentage by weight: 35-45 percent of calcium oxide, 16-25 percent of calcium fluoride, 5-10 percent of titanium white, 5-10 percent of silica, 4-8 percent of silicon iron, 3-5 percent of medium carbon ferromanganese, 2-4 percent of ferro-molybdenum, 3-5 percent of chromium nitride iron, 3-5 percent of potassium oxide, 4-6 percent of sodium oxide and 1-3 percent of nickel. The metal clad with the corrosion-resisting high-strength two phase stainless steel welding rod has excellent mechanical property, welding performance and pitting and stress corrosion resistance.

Description

technical field [0001] The invention relates to a stainless steel electrode for arc welding, in particular to a duplex stainless steel electrode. Background technique [0002] With the increasing diversification and maturity of human industrial technology, the performance requirements of steel products in the process of industrialization development in various countries in the world are also gradually increasing. Therefore, the demand for duplex stainless steel with excellent corrosion resistance, toughness and high strength is also increasing. 2506 duplex stainless steel is one of them. It is widely used in oil refining equipment, petrochemical heat exchangers, and chemical tankers. The chemical composition (mass percentage) of steel structural parts such as wave wall cargo tanks, large bridge structures and pipeline cables in deep sea oil fields is: C: ≤0.030%, Mn: ≤2.0%, Si: ≤1.0%, S: ≤ 0.020%, P: ≤0.030%, Cr: 24.0-26.0%, Ni: 5.5-7.5%, Mo: 2.5-3.5%, N: 0.10-0.20%, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/40
Inventor 何国匡俊马玉顺杨晋慧余天乐于清波区天仁
Owner 上海狮百盛焊材科技有限公司
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