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Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding

A manual electric arc, alkaline electrode technology, applied in welding medium, welding equipment, metal processing equipment and other directions, can solve the problem of lack of welding rod, etc., and achieve the effect of good molten pool fluidity, good low temperature toughness, and high weld strength.

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 the present invention is to provide a low-hydrogen alkaline electrode for manual arc welding of 25Cr2Ni4MoV alloy steel, which solves the problem that the prior art lacks an electrode for manual arc welding of 25Cr2Ni4MoV alloy steel

Method used

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  • Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding
  • Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding
  • Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding

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Experimental program
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Effect test

Embodiment 1

[0032] Step 1, making alloy steel welding core

[0033]The preparation weight ratio is 1:1 for professional pure iron and industrial pure iron. Ores containing C, Si, Mo, Cr are placed around and on the upper part of the magnesia crucible in the induction furnace, Ni powder is placed in the middle of the crucible, 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 ...

Embodiment 2

[0043] Step 1, making alloy steel welding core:

[0044] The preparation weight ratio is 1:1 for professional pure iron and industrial pure iron. Ores containing C, Si, Mo, Cr are placed around and on the upper part of the magnesia crucible in the induction furnace, Ni powder is placed in the middle of the crucible, 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 argo...

Embodiment 3

[0053] Step 1, making alloy steel welding core:

[0054] Prepare professional pure iron and industrial pure iron with a weight ratio of 1:1, put ores containing C, Si, Mo, Cr around and on the upper part of the magnesia crucible in the induction furnace, Ni powder in the middle of the crucible, Re, Mn, B Put in the pan. 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 before tappin...

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Abstract

The invention provides a low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding, comprising a core wire and a coating, wherein the core wire is composed of the following components by weight percent: 0.030-0.070% of C, 0.10-0.50% of Si, 1.0-2.0% of Mn, 3.0-5.0% of Ni, 0.10-0.50% of Mo, 0.50-2.0% of Cr, 0.10-0.30% of Ti, 0.002-0.009% of B, 0.10-0.30% of Re, less than 0.005% of S, less than 0.005% of P and the balance of Fe, and the total weight of all components is 100%. The welding rod prepared by the invention has favorable arc stabilizing performance, good weld pool flowability, fine droplet spatters, easy slag detachability after welding, evenly covered slag, delicate and beautiful moulded welding line and controllable content of deposited metals of welding rod diffusible hydrogen.

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 manual arc welding of 25Cr2Ni4MoV alloy steel. Background technique [0002] In recent years, the use of large-scale fans in my country's industry has become more and more widely used, and the working conditions have become more and more complicated. In order to improve the overall quality of the fan, the blade material of the core part of the fan is required to have good comprehensive mechanical properties such as high strength, toughness and hardness. . 25Cr2Ni4MoV steel is the steel used for relatively large generator rotors in my country at present. It has the advantages of high strength, high plasticity and toughness, and low brittle transition temperature. In industrial applications, through quenching and tempering (quenching + high temperature tempering) to obtain excellent strength and toughness matc...

Claims

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Application Information

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