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

A FV520, alkaline electrode technology, used in arc welding equipment, welding/welding/cutting items, welding media, etc., can solve the problem of lack of welding electrodes, and achieve good molten pool fluidity, good low temperature toughness, and high weld strength. Effect

Active Publication Date: 2010-12-15
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] The preparation weight ratio is 1:1 for professional pure iron and industrial pure iron. The ores containing C, Si, Mo, Cr, and Nb are packed around and above the magnesia crucible in the induction furnace. Ni powder is packed in the middle of the crucible, and Cu, Re, Mn, and B are put into the tray. The carbon in the crucible acts as a deoxidizer. Put the pure iron and the material in the crucible into an induction furnace for smelting. When the pure iron is completely melted, the alloy steel temperature reaches 1540℃, and the molten steel is calm, the power is cut off and the exhaust is cooled for 15 minutes; then the power is sent for refining, and after 20 minutes of refining When the alloy steel temperature drops to 1550℃, add Ti powder and the temperature continues to drop to the tapping temperature (the tapping temperature is 1540℃) before tapping. Fill the furnace with argon 5min before tapping to make the furna...

Embodiment 2

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

[0046] The preparation weight ratio is 1:1 for professional pure iron and industrial pure iron. The ores containing C, Si, Mo, Cr, and Nb are packed around and above the magnesia crucible in the induction furnace. Ni powder is packed in the middle of the crucible, and Cu, Re, Mn, and B are put into the tray. The carbon in the crucible acts as a deoxidizer. Put the pure iron and the material in the crucible into an induction furnace for smelting. When the pure iron is completely melted, the alloy steel temperature reaches 1540℃, and the molten steel is calm, the power is cut off and the exhaust is cooled for 15 minutes; then the power is sent for refining, and after 20 minutes of refining When the alloy steel temperature drops to 1550℃, add Ti powder and the temperature continues to drop to the tapping temperature (the tapping temperature is 1540℃) before tapping. Fill the furnace with argon 5min before tapping to make the furn...

Embodiment 3

[0055] Step 1, make stainless steel welding core

[0056] The preparation weight ratio is 1:1 for professional pure iron and industrial pure iron. The ores containing C, Si, Mo, Cr, and Nb are packed around and above the magnesia crucible in the induction furnace. Ni powder is packed in the middle of the crucible, and Cu, Re, Mn, and B are put into the tray. The carbon in the crucible acts as a deoxidizer. Put the pure iron and the material in the crucible into an induction furnace for smelting. When the pure iron is completely melted, the alloy steel temperature reaches 1540℃, and the molten steel is calm, the power is cut off and the exhaust is cooled for 15 minutes; then the power is sent for refining, and after 20 minutes of refining When the temperature of the alloy steel drops to 1550℃, add Ti powder, and the temperature continues to drop to the tapping temperature (the tapping temperature is 1540℃) before tapping. Fill the furnace with argon 5min before tapping to make t...

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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 specifically relates to a low-hydrogen alkaline electrode for FV520 (B) stainless steel manual arc welding. Background technique [0002] FV520(B) steel is a precipitation hardening stainless steel researched and developed by the British Firth Vickers Material Research Laboratory. 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, which is martensitic A kind of precipitation hardening steel), is a kind of low carbon martensitic precipitation hardening stainless steel. After FV520(B) steel was introduced into my country in recent years, it has been active in the fan manufacturing industry. It is mainly used to manufacture medium and high speed fan blades containing corrosive media. It is also used in gears, bolts, shafts, wheels, rotors, and pump parts. Wait...

Claims

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Application Information

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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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