Titanium-calcium welding rod

A technology of welding rod and titanium calcium, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of not having 2205 duplex stainless steel, etc., and achieve good arc stability, fine and beautiful weld shape, and spatter particles small effect

Inactive Publication Date: 2015-06-03
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a titanium-calcium type electrode, which solves the problem that there is no special welding material for manual arc welding of 2205 duplex stainless steel on the market

Method used

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  • Titanium-calcium welding rod
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  • Titanium-calcium welding rod

Examples

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Effect test

preparation example Construction

[0011] The preparation method of above-mentioned titanium-calcium type electrode, concrete steps are as follows:

[0012] Step 1, the welding core is composed of the following components by weight percentage: 0.02%-0.03% carbon, 1.25%-1.6% manganese, 0.2%-0.3% silicon, 20%-23% chromium, 8.5%-9.5% nickel, molybdenum 2.5%~4.0%, nitrogen 0.15~0.20%, sulfur<0.01%, phosphorus<0.02%, the balance is iron, the weight percentage sum of the above components is 100%; Pure iron and industrial pure iron, ores containing C, Si, Mo, Cr, N, and nickel powder are put into the induction furnace together for smelting until the materials are all melted to form molten alloy steel, and its temperature reaches 1540 ° C. After the molten alloy steel is calm Stop heating, cool and exhaust for 10 to 20 minutes, then heat and refine for 15 to 25 minutes, and fill in argon and a small amount of nitrogen 5 minutes before the temperature of the molten alloy steel drops to 1540°C, so that the pressure in th...

Embodiment 1

[0033] Step 1, first put professional pure iron and industrial pure iron with a mass ratio of 1:1, ores containing C, Si, Mo, Cr, N, and nickel powder into an induction furnace for smelting, and the materials are all melted to form an alloy When the temperature of molten steel reaches 1540°C, stop heating when the molten alloy steel is calm, cool and exhaust for 15 minutes and then heat and refine for 20 minutes. When the air pressure reaches 250mmHg, when the temperature of the molten alloy steel is 1540°C, add Mn to the molten alloy steel and stir for 2 minutes, then tap the steel. After the surface of the molten alloy steel is calm, pour it evenly, and cool it to room temperature to obtain a steel ingot;

[0034] The steel ingot is peeled and forged into a billet. After cooling to room temperature, the black skin and cracks on the surface of the billet are removed and the header is cut off. Then, the billet is rolled into a wire rod with a diameter of 6.5mm by a rolling mill...

Embodiment 2

[0041] Step 1, first put professional pure iron and industrial pure iron with a mass ratio of 1:1, ores containing C, Si, Mo, Cr, N, and nickel powder into an induction furnace for smelting, and all the materials are melted to form an alloy When the molten steel temperature reaches 1540°C, stop heating when the molten alloy steel is calm, cool and exhaust for 10 minutes, then heat and refine for 15 minutes, and fill in argon and a small amount of nitrogen 5 minutes before the temperature of the molten alloy steel drops to 1540°C to make the pressure in the furnace Reach 350mmHg, when the temperature of the molten alloy steel is 1540°C, add Mn to the molten alloy steel and stir for 2 minutes, then tap the steel. After the surface of the molten alloy steel is calm, pour it evenly, and cool it to room temperature to obtain a steel ingot;

[0042] The steel ingot is peeled and forged into a billet. After cooling to room temperature, the black skin and cracks on the surface of the b...

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Abstract

The invention discloses a titanium-calcium welding rod which comprises a welding core and a coating. The coating comprises, by weight, 6%-25% of dolomite, 2%-8% of fluorite, 30%-45% of rutile, 1%-8% of titanium dioxide, 2%-8% of ferrotitanium, 2%-10% of ferromanganese, 5%-20% of feldspar, 2%-10% of white mud, 2%-7% of chalk, 1%-2% of mica, wherein sum of the weight percentages of all the components is 100%. The welding core comprises, by weight, 0.02%-0.03% of carbon, 1.25%-1.6% of manganese, 0.2%-0.3% of silicon, 20%-23% of chromium, 8.5%-9.5% of nickel, 2.5%-4.0% of molybdenum, 0.15%-0.20% of nitrogen, less than 0.01% of sulfur, less than 0.02% of phosphorus and the rest of ferrum, wherein the sum of the weight percentages of all the components is 100%. After the titanium-calcium welding rod is welded, slag is easy to remove and cover of the slag is uniform.

Description

technical field [0001] The invention belongs to the technical field of material processing, and relates to a calcium-titanium electrode, in particular to a calcium-titanium electrode for welding 2205 duplex stainless steel. Background technique [0002] 2205 duplex stainless steel is a kind of nitrogen-added duplex stainless steel, referred to as 2205 duplex steel, which is a composite stainless steel composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. The main alloying elements are Cr, Ni, Mo and N, can resist medium-strength uniform corrosion and chlorine stress corrosion cracking. At present, there is no special welding material for manual arc welding of 2205 duplex stainless steel on the market. Therefore, it is very necessary to study the matching of 2205 duplex stainless steel, improve the impact toughness of the weld, and solve the welding material with insufficient weld toughness after welding. Contents of the invention [0003] The purpose o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365B23K35/30B23K35/40
Inventor 张敏张翔李继红
Owner XIAN UNIV OF TECH
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