Low-hydrogen basic electrode for welding FV520 (B) stainless steel

A technology of FV520 and basic welding rod, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor comprehensive mechanical properties of stainless steel welding rods, and achieve fine and beautiful weld formation, less spatter and smoke, The effect of easy slag removal after welding

Active Publication Date: 2010-12-08
SERVICE CENT OF COMMLIZATION OF RES FINDINGS HAIAN COUNTY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of FV520 (B) stainless steel welding with low hydrogen alkaline electrode, solve the welding rod that our country uses and FV520 (B) stainless steel matches are imported from abroad, and the foreign imported FV520 (B) The problem of poor comprehensive mechanical properties of stainless steel electrodes

Method used

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  • Low-hydrogen basic electrode for welding FV520 (B) stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1, make stainless steel welding core:

[0031]Prepare professional pure iron and industrial pure iron with a weight ratio of 1:1. Put ores containing C, Si, Mo, Cr and Nb around and on the upper part of the magnesia crucible in the induction furnace, Ni powder in the middle of the crucible, Cu, Re, Mn, B put into the tray. The carbon in the crucible acts as a deoxidizer. Put the pure iron and the contents in the crucible together into the induction furnace for smelting. When the pure iron is completely melted, the temperature of the molten alloy steel reaches 1540°C, and when the molten steel is calm, turn off the power to cool and exhaust for 15 minutes; then turn on the power for refining, and after 20 minutes of refining , When the temperature of the alloy steel liquid drops to 1550°C, add Ti powder, and then tap the steel when the temperature continues to drop to the tapping temperature (the tapping temperature is 1540°C). Fill the furnace with argon 5 minute...

Embodiment 2

[0043] Step 1, make stainless steel welding core:

[0044] Prepare professional pure iron and industrial pure iron with a weight ratio of 1:1. Put ores containing C, Si, Mo, Cr and Nb around and on the upper part of the magnesia crucible in the induction furnace, Ni powder in the middle of the crucible, Cu, Re, Mn, B put into the tray. The carbon in the crucible acts as a deoxidizer. Put the pure iron and the contents in the crucible together into the induction furnace for smelting. When the pure iron is completely melted, the temperature of the molten alloy steel reaches 1540°C, and when the molten steel is calm, turn off the power to cool and exhaust for 15 minutes; then turn on the power for refining, and after 20 minutes of refining , When the temperature of the alloy steel liquid drops to 1550°C, add Ti powder, and then tap the steel when the temperature continues to drop to the tapping temperature (the tapping temperature is 1540°C). Fill the furnace with argon 5 minut...

Embodiment 3

[0055] Step 1, make stainless steel welding core:

[0056] Prepare professional pure iron and industrial pure iron with a weight ratio of 1:1. Put ores containing C, Si, Mo, Cr and Nb around and on the upper part of the magnesia crucible in the induction furnace, Ni powder in the middle of the crucible, Cu, Re, Mn, B put into the tray. The carbon in the crucible acts as a deoxidizer. Put the pure iron and the contents in the crucible together into the induction furnace for smelting. When the pure iron is completely melted, the temperature of the molten alloy steel reaches 1540°C, and when the molten steel is calm, turn off the power to cool and exhaust for 15 minutes; then turn on the power for refining, and after 20 minutes of refining , When the temperature of the alloy steel liquid drops to 1550°C, add Ti powder, and then tap the steel when the temperature continues to drop to the tapping temperature (the tapping temperature is 1540°C). Fill the furnace with argon 5 minut...

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Abstract

The invention discloses a low-hydrogen basic electrode for welding FV520 (B) stainless steel, comprising a core wire and an electrod covering, wherein the electrode covering comprises the following materials in weight percentage: 35%-45% of marble, 18%-26% of fluorite, 6%-9% of quartz, 3%-6% of zircon sand, 6%-12% of rutile, 1%-3% of ferrosilicon, 6%-10% of ferrotitanium, 5%-11% of low-carbon ferromanganese, 1%-3% of rare-earth ferrosilicon and 0.5%-1.5% of sodium carbonate, and the sum of the weight percentages of the components is 100%. Compared with the traditional special imported electrode for the FV520 (B) stainless steel, the electrode made of the electrode covering has the advantages of favorable arc stabilization performance, good fluidity of a molten bath, less splash and dust, easier slag removal after welding, uniform slag coverage, and delicate and attractive welding joint formation. The content of diffusible hydrogen generated by using the developed electrode for depositing metal is effectively controlled and meets the requirements of low-carbon contents.

Description

technical field [0001] The invention belongs to the technical field of welding in material processing, and in particular relates to a low-hydrogen alkaline electrode for welding FV520 (B) stainless steel. Background technique [0002] FV520(B) steel is a precipitation hardening stainless steel developed by the Firth Vickers Materials Research Laboratory in the United Kingdom. It is a new type of martensitic precipitation hardening stainless steel developed on the basis of the original FV520 steel. FV520 is a semi-precipitation hardening stainless steel. A type of precipitation hardening steel is a low carbon martensitic precipitation hardening stainless steel. FV520(B) steel has been active in the fan manufacturing industry since it was introduced into my country in recent years. It is mainly used to manufacture medium and high-speed fan blades that pump and pump corrosive media. It is also used in gears, bolts, shafts, discs, rotors, and pump parts. and other occasions. FV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/30
Inventor 张敏李继红李岩
Owner SERVICE CENT OF COMMLIZATION OF RES FINDINGS HAIAN COUNTY
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