Self-protection type flux-cored wire for welding of G520 stainless steel and 25Cr2Ni4MoV alloy steel and preparation method of self-protection type flux-cored wire

A technology of flux-cored welding wire and stainless steel, applied in welding equipment, welding medium, metal processing equipment, etc., to achieve the effect of simple preparation method, convenient operation and high production efficiency

Inactive Publication Date: 2018-08-03
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only a few reports on the welding process of G520 alloy steel and 25Cr2Ni4MoV stainless steel dissimilar welding, and there is no report on its fusion welding self-shielded flux cored wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] The preparation method of self-shielding flux-cored welding wire for welding G520 stainless steel and 25Cr2Ni4MoV alloy steel, the specific steps are as follows:

[0044] Step 1. Weigh respectively according to mass percentage: 1%-4% of ferrosilicon powder, 3%-5% of manganese powder, 15%-20% of chromium powder, 12%-16% of nickel powder, 7%-9% of copper powder , ferroniobium powder 2% to 5%, rutile powder 8% to 13%, fluorite powder 13% to 15%, zircon sand powder 6% to 10%, lithium carbonate powder 4% to 8%, iron oxide powder 3 %~5%, alumina powder 3%~5%, magnesium oxide powder 4%~5%, the rest is iron powder, the sum of the mass percentages of the above components is 100%;

[0045] Step 2, mix lithium carbonate powder, iron oxide powder, aluminum oxide powder and magnesium oxide powder that step 1 takes by weighing, obtain mixed medicine powder A, add water glass binder in mixed medicine powder A and mix uniformly, mix medicine powder A and The mass ratio of the water gl...

Embodiment 1

[0051] The preparation method of self-shielding flux-cored welding wire for welding G520 stainless steel and 25Cr2Ni4MoV alloy steel, the specific steps are as follows:

[0052] Step 1. Weigh respectively by mass percentage: ferrosilicon powder 2%, manganese powder 5%, chromium powder 16%, nickel powder 12%, copper powder 8%, ferroniobium powder 4%, rutile powder 10%, fluorite powder 13%, zircon sand powder 9%, lithium carbonate powder 6%, iron oxide powder 4%, alumina powder 4%, magnesium oxide powder 4%, the rest is iron powder, the sum of the mass percentages of the above components is 100% ;

[0053] Step 2, mix lithium carbonate powder, iron oxide powder, aluminum oxide powder and magnesium oxide powder that step 1 takes by weighing, obtain mixed medicine powder A, add water glass binder in mixed medicine powder A and mix uniformly, mix medicine powder A and The mass ratio of the water glass binder is 5:1, and then placed in a heating furnace, sintered at 650°C for 5 hou...

Embodiment 2

[0060] The preparation method of self-shielding flux-cored welding wire for welding G520 stainless steel and 25Cr2Ni4MoV alloy steel, the specific steps are as follows:

[0061] Step 1. Weigh respectively by mass percentage: ferrosilicon powder 4%, manganese powder 3%, chromium powder 17%, nickel powder 13%, copper powder 7%, ferroniobium powder 3%, rutile powder 8%, fluorite powder 14%, zircon sand powder 10%, lithium carbonate powder 5%, iron oxide powder 4%, alumina powder 5%, magnesium oxide powder 5%, the rest is iron powder, the sum of the mass percentages of the above components is 100% ;

[0062] Step 2, mix lithium carbonate powder, iron oxide powder, aluminum oxide powder and magnesium oxide powder that step 1 takes by weighing, obtain mixed medicine powder A, add water glass binder in mixed medicine powder A and mix uniformly, mix medicine powder A and The mass ratio of the water glass binder is 5:1, and then placed in a heating furnace, sintered at 700°C for 4 hou...

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Abstract

The invention discloses a self-protection type flux-cored wire for welding of G520 stainless steel and 25Cr2Ni4MoV alloy steel. The self-protection type flux-cored wire comprises a flux core and a welding scale. The flux core comprises the following components of, by mass, 1%-4% of ferrosilicon powder, 3%-5% of manganese powder, 15%-20% of chromium powder, 12%-16% of nickel powder, 7%-9% of copperpowder, 2%-5% of ferrocolumbium powder, 8%-13% of rutile powder, 13%-15% of fluorite powder, 6%-10% of zircon sand powder, 4%-8% of lithium carbonate powder, 3%-5% of ferric oxide powder, 3%-5% of alumina powder, 4%-5% of magnesium oxide powder, and the balance iron powder, and the sum of the mass percentages of all the above components is 100%. Compared with a stainless steel welding rod and a solid welding wire, the prepared flux-cored wire flux-cored wire has the advantages of little welding spattering, attractive weld joint forming and good welding process performance and can be used fora continuous wire feeding automatic welder, a preparation method is simple, operation is convenient, and the preparation method can be used for mass production.

Description

technical field [0001] The invention belongs to the technical field of welding materials and preparation methods thereof, and in particular relates to a self-protecting flux-cored welding wire for welding G520 stainless steel and 25Cr2Ni4MoV alloy steel, and also relates to a preparation method of the flux-cored welding wire. Background technique [0002] In recent years, the use of large-scale fans in my country's industry has become increasingly widespread, and the operating conditions have become more and more complex. In order to improve the overall quality of the fan, the blade material at the core of the fan is required to have good comprehensive mechanical properties such as high strength, toughness and hardness. performance. G520 stainless steel is a new type of precipitation hardening martensitic stainless steel developed on the basis of FV520B type martensitic stainless steel. It has higher strength, good welding performance, heat resistance and corrosion resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/30B23K35/40
CPCB23K35/368B23K35/3053B23K35/40
Inventor 张敏李洁贾芳程康康黄超许桓瑞李静
Owner XIAN UNIV OF TECH
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