A kind of nano-modified boron-containing high-chromium cast iron wear-resistant surfacing welding self-protected flux cored wire

A high-chromium cast iron, nano-modified technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve problems such as poor wear resistance of alloys, improve wear resistance, refine grain size, Improve the effect of work function

Active Publication Date: 2018-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problem of poor wear resistance of high-chromium cast iron surfacing alloys at present, and provides a flux core of nano-modified boron-containing high-chromium cast iron wear-resistant surfacing welding self-protection flux-cored welding wire

Method used

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  • A kind of nano-modified boron-containing high-chromium cast iron wear-resistant surfacing welding self-protected flux cored wire
  • A kind of nano-modified boron-containing high-chromium cast iron wear-resistant surfacing welding self-protected flux cored wire
  • A kind of nano-modified boron-containing high-chromium cast iron wear-resistant surfacing welding self-protected flux cored wire

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specific Embodiment approach 1

[0033] Embodiment 1: This embodiment is a nano-modified flux core of boron-containing high-chromium cast iron wear-resistant surfacing welding self-shielding flux-cored wire, which is composed of 72% to 85% of high-chromium cast iron powder, 1% ~4% electrolytic manganese powder, 2%~6% ferrosilicon powder, 4%~8% ferroboron powder, 2%~6% graphite powder, 2%~4% aluminum-magnesium alloy powder and 0.3% ~1.5% nanomodifier composition.

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the nano-modifier is one or a mixture of nano-rare earth oxides, nano-rare-earth carbides and nano-rare-earth nitrides. Others are the same as the first embodiment.

specific Embodiment approach 3

[0035] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the nanometer rare earth oxide is La 2 o 3 , Nb 2 o 3 、Eu 2 o 3 、Gd 2 o 3 , Tb 2 o 3 、Er 2 o 3 , Yb 2 o 3 , CeO 2 and Y 2 o 3 one or a mixture of several. Others are the same as in the second embodiment.

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Abstract

The invention relates to a flux core for a high-chromium iron hardfacing self-protection flux-cored wire, in particular to the flux core for a nano-modified boron-containing high-chromium iron hardfacing self-protection flux-cored wire. The flux core aims to solve the technical problem that existing high-chromium iron surfacing alloy is poor in abrasion resistance. The flux core is prepared from high-chromium iron powder, electrolytic manganese powder, silicon iron powder, ferro-boron powder, graphite powder, aluminum magnesium alloy powder and a nano-modified agent. The organization of the nano-modified boron-containing high-chromium iron surfacing alloy is composed of primary M7C3 carbide, eutectic M7C3 carbide, martensite and retained austenite. The chromium iron hardfacing self-protection flux-cored wire can be used for repairing and manufacturing a mine cement vertical grinding roller, a coal mill grinding roller, a grinding wheel, a blast-furnace top bell, a hopper, a crusher hammerhead and the like.

Description

technical field [0001] The invention relates to a flux core of a high-chromium cast iron wear-resistant surfacing welding self-protection flux-cored welding wire. Background technique [0002] Surfacing welding refers to the process of using a certain heat source to deposit one or several layers of materials with certain performance on the surface of metal materials, which is used to repair parts or improve the wear resistance, heat resistance and corrosion resistance of parts. Overlay welding technology originated in the late 1950s in my country. After decades of development, iron-based, nickel-based, cobalt-based and other overlay welding materials have been formed. Among them, iron-based overlay welding materials are the most widely used due to their cheap price and variety. widely. High chromium cast iron surfacing materials contain a large amount of carbides, have high hardness and high wear resistance, and are widely used in metallurgical machinery, mining machinery, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K35/40B23K35/30
CPCB23K35/0266B23K35/306B23K35/368B23K35/406
Inventor 王铀勾俊峰刘赛月
Owner HARBIN INST OF TECH
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