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Supercritical ferrite and heat-resistant steel matched electrode and production method thereof

A production method, ferrite technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor slag removal performance, narrow weld bead, small arc blowing force, etc., and achieve full position Good operability, moderate weld wettability, and beautiful weld shape

Active Publication Date: 2013-05-01
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The heat-resistant steel matching electrodes for supercritical steam turbines ZG1Cr10MoVNbN and T91 / P91 pipelines in the market are imported from abroad on the one hand with high cost and long cycle time; on the other hand, the electrodes have poor arc stability and low arc blowing force during welding. Large welding spatter, narrow weld bead, poor weld formation, poor slag removal performance and other disadvantages
And it is difficult to achieve the best welding process performance and mechanical properties at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Take the drug skin, the components of the drug skin and their mass parts are as follows: marble: 30%, fluorite: 25%, electrolytic manganese: 2.2%, ferrosilicon: 2.2%, silicon micropowder: 5%, metal chromium: 24% , Nickel powder: 1.4%, ferromolybdenum: 4.4%, ferro-niobium: 0.5%, amorphous graphite: 0.4%, ferro-titanium: 5%, soda ash: 0.8%, CMC: 0.6%, ferro-vanadium: 1.3%, nitride Ferrochromium: 1.2%.

[0063] Take the welding core. The welding core is selected from carbon steel wire with low content such as sulfur, phosphorus, arsenic and tin. The mass percentage of the chemical composition of the welding core is: C:0.08, Mn:0.43, Si:0.04, S:0.004, P:0.005, Cr:0.03, Ni: 0.04, Al: 0.005, Cu: 0.09, As: 0.005, and the rest is Fe.

[0064] Mix the components of the drug coating evenly, add 42-44° Be"d potassium sodium water glass accounting for 18-25% of the mass content of the solid component, and prepare the paste for the drug coating. Electrode preparation is carried ou...

Embodiment 2

[0067] Take the drug skin, the components of the drug skin and their mass parts are as follows: marble: 33%, fluorite: 22%, electrolytic manganese: 2.1%, ferrosilicon: 2.2%, silicon micropowder: 6%, metal chromium: 23.8% , nickel powder: 1.5%, molybdenum iron: 4.4%, niobium iron: 0.5%, amorphous graphite: 0.4%, titanium iron: 5%, soda ash: 0.8%, CMC: 0.6%, vanadium iron: 1.2%, nitride Ferrochromium: 1.1%.

[0068] Take the welding core. The welding core is selected from carbon steel wire with low content such as sulfur, phosphorus, arsenic and tin. The mass percentage of the chemical composition of the welding core is: C:0.08, Mn:0.43, Si:0.04, S:0.004, P:0.005, Cr:0.03, Ni: 0.04, Al: 0.005, Cu: 0.09, As: 0.005, and the rest is Fe.

[0069] After mixing the components of the drug coating evenly, add 42-44° Be"d potassium sodium water glass accounting for 18-25% of the mass content of the solid component to prepare a paste for the drug coating, together with the above-mentione...

Embodiment 3

[0072] Take the drug skin, the components of the drug skin and their mass parts are as follows: marble: 32%, fluorite: 25%, electrolytic manganese: 2.0%, ferrosilicon: 2.2%, silicon micropowder: 5.5%, metal chromium: 22.8% , nickel powder: 1.5%, ferromolybdenum: 4.3%, ferro-niobium: 0.45%, amorphous graphite: 0.4%, ferro-titanium: 5%, soda ash: 0.8%, CMC: 0.6%, ferro-vanadium: 1.2%, nitride Ferrochrome: 1.0%.

[0073] Take the welding core. The welding core is selected from carbon steel wire with low content such as sulfur, phosphorus, arsenic and tin. The mass percentage of the chemical composition of the welding core is: C:0.08, Mn:0.43, Si:0.04, S:0.004, P:0.005, Cr:0.03, Ni: 0.04, Al: 0.005, Cu: 0.09, As: 0.005, and the rest is Fe.

[0074] After mixing the components of the drug coating evenly, add 42-44° Be"d potassium sodium water glass accounting for 18-25% of the mass content of the solid component to prepare a paste for the drug coating, together with the above-ment...

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Abstract

The invention discloses a supercritical ferrite and heat-resistant steel matched electrode, which consists of a core wire and coating. The coating comprises the following components by mass percentage: 28-40 percent of marble, 18-28 percent of fluorite, 1.5-4 percent electrolytic manganese, 2-5 percent of ferrosilicon, 4-10 percent of silica powder, 20-26 percent of chromium metal, 1-1.8 percent of nickel powder, 4-5 percent of ferromolybdenum, 0.4-0.8 percent of ferrocolumbium, 0.2-0.6 percent of amorphous graphite, 3-8 percent of ferrotitanium, 0.4-0.8 percent of soda ash, 0.4-0.8 percent of CMC, 1-1.8 percent of ferrovanadium and 0.6-1.5 percent of ferrochrome nitride. The matched electrode provided by the invention is used for welding supercritical steam turbine ZG1Cr10MoVNbN steel with T91 / P91 pipe heat-resistant steel. Welds after welding have excellent performances such as higher strength, high toughness and better 100-thousand-hour endurance strength similar to the performance of bodies.

Description

technical field [0001] The invention relates to a welding rod, in particular to a matching welding rod for supercritical ferritic heat-resistant steel and a production method thereof. Background technique [0002] In order to improve thermal efficiency, reduce CO2 emissions, and meet the requirements of environmental protection and energy conservation, countries all over the world are vigorously developing various energy-saving and environmental protection products such as supercritical boilers and circulating fluidized beds, and my country is no exception. In developed countries, power plant units are basically developing towards large capacity and high parameters. In order to reduce energy consumption and improve thermal efficiency, large-capacity and high-efficiency supercritical units have been produced and put into operation one after another; through continuous improvement and development, supercritical units Availability, flexibility and operational reliability have r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/365B23K35/40
Inventor 何秀曾志超王若蒙
Owner ATLANTIC CHINA WELDING CONSUMABLES
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