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Soldering wire material containing nitrogen alloyed alloy core in form of hard surface

A hardfacing alloy and flux-cored wire technology, applied in welding/cutting media/materials, welding equipment, welding media, etc., can solve problems such as easy peeling, uneven distribution of carbides in hardfacing alloys, and low high temperature stability , to achieve the effect of low comprehensive cost, excellent welding process performance and high production efficiency

Inactive Publication Date: 2005-01-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ① High carbon equivalent, poor resistance to welding cracks
[0004] ②Low plasticity, easy to peel off
This results in uneven distribution of carbides in hardfacing alloys, low plasticity, and easy peeling off during use
[0005] ③The high temperature stability is not high, and the corrosion resistance is average
When high-carbon hardfacing alloys are in service at higher temperatures, carbon diffusion will occur at the carbide point, resulting in carbide decomposition or type transformation, shortening the service life
The pitting corrosion resistance of high carbon hard facing alloy is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Example 1: rutile, 8%; quartz, 4%; fluorite, 6%; high carbon ferrochrome, 17%; low carbon ferrochrome, 42%; rare earth silicon, 3%; , 2%; ferrovanadium with 25% vanadium, 1%; ferro-titanium with 20% titanium, 1%; magnesium-aluminum alloy, 3%; Chromium nitride, 4%; metallic nickel, 4%.

[0016] Drug core weight coefficient is 35-37%

example 2

[0017] Example 2: rutile, 3%; high-carbon ferrochrome, 14%; low-carbon ferrochrome, 52%; rare earth silicon, 3%; ferromolybdenum containing 55% molybdenum, 5%; Ferro-vanadium, 4%; ferro-titanium with 25% titanium, 1%; magnesium-aluminum alloy, 2%; metal manganese, 5%; chromium nitride with 8% nitrogen, 6%; metal nickel, 5% %.

[0018] Drug core weight coefficient is 34~36%

example 3

[0019] Example 3: rutile, 6%; quartz, 2%; fluorite, 3%; high carbon ferrochrome, 13%; low carbon ferrochrome, 53%; rare earth silicon, 4%; , 4%; ferrovanadium with 25% vanadium, 3%; ferrotitanium with 20% titanium, 2%; metal manganese, 6%; chromium nitride with 9% nitrogen, 4%; Metal nickel, 2%.

[0020] The weight coefficient of the drug core is 33-35%.

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Abstract

A nitrogen alloyed welding wire with hard surface and alloy core for repairing on manufacturing rolling roller, mine machinery and large digger features that its core powder is prepared from alloy powder and mineral powder through mixing, and contains rutile, high-carbon ferrochromium, low-carbon ferrochromium, Si Al-Mg alloy, Mn, ferromolybdenum, ferrovanadium, ferrotictanium, Ni, chromium nitride and Fe. The nitrogen is used to replace part of carbon for alloying, so improving anticracking performance.

Description

technical field [0001] The invention belongs to the technical field of welding wire materials, and in particular relates to a nitrogen-alloyed hard-facing alloy flux-cored welding wire material. Background technique [0002] Hardfacing alloy flux cored wire materials are mainly used for surfacing repair and composite manufacturing of engineering machinery such as rolls of iron and steel metallurgical equipment, mining machinery and large excavators. At present, hardfacing alloy flux-cored wire materials used for surfacing repair are generally alloyed with carbon, and a large number of carbonized material points are distributed in the matrix to form a high-carbon hardfacing alloy. This high-carbon hardfacing alloy flux-cored wire material has the following obvious deficiencies: [0003] ① High carbon equivalent, poor resistance to welding cracks. In order to obtain better corrosion resistance, a large amount of alloying elements such as C, Cr, Mo, and V are added, which gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/22
Inventor 余圣甫
Owner HUAZHONG UNIV OF SCI & TECH
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