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Martensitic stainless steel flux-cored wire

A technology of martensitic stainless steel and flux-cored welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve problems such as wear resistance and corrosion are not very ideal, and affect the quality of weld seam, etc., to achieve Good arc starting and stabilizing performance, uniform slag coverage, fine and beautiful weld formation

Inactive Publication Date: 2016-09-21
HAIMEN WEILING WELDING MATERIAL MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The chemical composition of the welding wire directly affects the quality of the weld. The main components of ordinary welding wire are titanium, boron, silicon, chromium and other elements, and the wear resistance and corrosion resistance are not very ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the martensitic stainless steel flux-cored welding wire of the present invention, the components of the martensitic stainless steel flux-cored welding wire are:

[0031] Calcium carbonate 15%;

[0032] Sodium carbonate 15%;

[0033] Chromium powder 25%;

[0034] Nickel powder 15%;

[0035] Ferrovanadium 12%;

[0036] Molybdenum nitride 3%;

[0037] Titanium nitride 8%;

[0038] Niobium nitride 7%.

Embodiment 2

[0040] In the martensitic stainless steel flux-cored welding wire of the present invention, the components of the martensitic stainless steel flux-cored welding wire are:

[0041] Calcium carbonate 18%;

[0042] Sodium carbonate 18%;

[0043] Chromium powder 30%;

[0044] Nickel powder 10%;

[0045] Ferrovanadium 10%;

[0046] Molybdenum nitride 4%;

[0047] Titanium nitride 5%;

[0048] Niobium nitride 5%.

Embodiment 3

[0050] In the martensitic stainless steel flux-cored welding wire of the present invention, the components of the martensitic stainless steel flux-cored welding wire are:

[0051] Calcium carbonate 20%;

[0052] Sodium carbonate 20%;

[0053] Chromium powder 18%;

[0054] Nickel powder 10%;

[0055] Ferrovanadium 10%;

[0056] Molybdenum nitride 5%;

[0057] Titanium nitride 8%;

[0058] Niobium nitride 7%.

[0059] At least 90% of the particles in the chromium powder and nickel powder are larger than 120 μm by weight percentage.

[0060] Three kinds of nitrides (molybdenum nitride, titanium nitride, niobium nitride) are used to make the metal grains of the surfacing layer finer, the particle distribution is more uniform, the hardness is high, the ductility is good, the toughness is good, the wear resistance is good, and the Highly corrosive.

[0061] The flux-cored welding wire of the present invention has good arc starting and arc stabilizing properties, good molten ...

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PUM

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Abstract

The invention discloses a martensitic stainless steel flux-cored wire. The martensitic stainless steel flux-cored wire comprises the following components in percentage by weight: 15-20% of calcium carbonate, 15-20% of sodium carbonate, 15-40% of chromium powder, 10-25% of nickel powder, 10-15% of ferrovanadium, 2-5% of molybdenum nitride, 5-8% of titanium nitride, and 4-7% of niobium nitride; and the sum of all the components in percentage by mass is 100%. The flux-cored wire is excellent in arc starting and arc stabilizing performance, excellent in fluidity of a molten pool, fine in splashing particles, uniform in covering of after-welded molten slag, easy to remove slag and meticulous and beautiful in welding line formation.

Description

technical field [0001] The invention relates to a welding wire, in particular to a martensitic stainless steel flux-cored welding wire. Background technique [0002] FV520B is a low-carbon martensitic precipitation-hardening stainless steel with excellent corrosion resistance and weldability similar to ordinary austenitic stainless steel. It also has good impact toughness and ideal transverse properties on larger sections. It is widely used Used in gears, bolts, shafts, discs, blades, rotors, pump parts, etc. [0003] The chemical composition of the welding wire directly affects the quality of the weld. The main components of ordinary welding wire are titanium, boron, silicon, chromium and other elements, and the wear resistance and corrosion resistance are not very ideal. [0004] Therefore, a new technical solution is needed to solve the above problems. Contents of the invention [0005] The technical problem to be solved by the present invention is to provide a high-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30
CPCB23K35/3053B23K35/0266B23K35/308
Inventor 苏红菱
Owner HAIMEN WEILING WELDING MATERIAL MFG
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