Low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel

A FV520, alkaline electrode technology, applied in arc welding equipment, welding/welding/cutting items, welding medium, etc., can solve the problem of lack of welding rod, etc., achieve good molten pool fluidity, fine and beautiful welding seam shape, splash particles tiny effect

Active Publication Date: 2012-11-07
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 manual arc welding with low-hydrogen alkaline welding rod, has solved the problem that existing domestic market lacks for FV520 (B) stainless steel special manual arc welding welding rod

Method used

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  • Low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel
  • Low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel
  • Low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, make stainless steel welding core

[0035] 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

[0045] Step 1, make stainless steel welding core:

[0046] 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 minutes...

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Abstract

The invention discloses a low-hydrogen basic electrode for manual metal arc welding of FV520 (B) stainless steel, which comprises a core and a coating. The core comprises the following components in percentage by weight: 0.030%-0.080% of C, 0.30%-1.0% of Si, 0.70%-1.50% of Mn, 4.80%-6.00% of Ni, 1.00%-1.80% of Mo, 13.00%-13.80% of Cr, 0.10%-0.25% of Ti, 0.10%-0.50% of Nb, 0.60%-1.50% of Cu, 0.002%-0.006% of B, 0.10%-0.30% of Re, less then 0.005% of S, less than 0.005% of P and the balance of Fe. The low-hydrogen basic electrode has the advantages of high arc stability, good molten bath fluidity, fine spatter particles, easy deslagging after welding, uniform slag coverage and controlled diffusible hydrogen content in deposited metal.

Description

technical field [0001] The invention belongs to the field of welding in material processing, and in particular relates to a low-hydrogen alkaline electrode for manual arc welding of FV520 (B) stainless steel. Background technique [0002] FV520 (B) steel is a precipitation hardening stainless steel developed by Firth Vickers Materials Research Laboratory in the United Kingdom. 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. FV520(B) has excellent corrosion resistance and weldability similar to 18-8 steel, also has good impact toughness and ideal transverse properties on larger sections, easy to process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/365B23K9/00B23K103/04
Inventor 张敏李岩李继红
Owner SERVICE CENT OF COMMLIZATION OF RES FINDINGS HAIAN COUNTY
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