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Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk

A grinding disc and open arc technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problem of heavy smoke and dust, and achieve the effect of light smoke and dust, saving consumption, and fine smoke particles

Inactive Publication Date: 2010-03-03
JIANGXI HENGDA HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ordinary open-arc surfacing repair or new grinding rollers and discs have a service life of 5,000 to 10,000 hours. In addition, the existing open-arc welding wire has a lot of smoke and dust during welding, and there is considerable room for improvement in terms of service life and application effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chemical composition (% by weight) of the powder is: chromium carbide (Cr 3 C 2 ) 16%; high carbon ferrochromium 38%; ferromanganese (MnFe) 2.8%; ferrosilicon (SiFe) 5.5%; molybdenum iron (MoFe) 3%; ; Graphite (C) 4%; Titanium Oxide (TiO 2 )6%; calcium fluoride (CaF 2 )10%; silicon oxide (SiO 2 )4%.

Embodiment 2

[0023] The chemical composition (% by weight) of the powder is: chromium carbide (Cr 3 C 2 ) 18%; high-carbon ferrochrome 35%; ferromanganese (MnFe) 2.5%; ferrosilicon (SiFe) 5.5%; niobium ferro(NbFe) 4%; ; Graphite (C) 4%; Titanium Oxide (TiO 2 )5%; calcium fluoride (CaF 2 )10%; silicon oxide (SiO 2 )4%.

[0024] The filling rate of the powder is 45-60%. The wire diameter of the present invention is Φ2.4mm, Φ2.8mm, and Φ3.2mm in three specifications.

[0025] In the chemical composition of the powder, the nano-additive (A) contained may be one of nano-TiN (titanium nitride), nano-SiN (silicon nitride), and nano-SiC (silicon carbide) or any combination of the three. The nano-scale nano-additive (A) is added to the powder of the open-arc flux-cored wire, which plays a role in the dispersion strengthening of the nano-ceramic phase, enhances the cohesive strength, fracture strength and bonding strength of the cladding layer material, and has good high temperature Stability...

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Abstract

The present invention provides an open arc overlaying wire material with strong abrasive resistance for a grinding roller and a grinding disk, which consists of a steel sheet and powder arranged in the steel sheet. A nano additive (A) is added into the powder, wherein the nano additive (A) can be one or any combination of three of nano TiN (titanium nitride), nano SiN (silicon nitride) and nano SiC (silicon carbide). The powder contains 3 to 5 weight percent of the nano additive (A). The nano additive (A) has the functions of strengthening dispersion of nano ceramic phases, improves cohesion strength, rupture strength and combination strength of a cladding layer material and has good high-temperature stability; and the nano additive (A) improves self lubricity of the material, improves theabrasive resistance of cladding layer metals and prolongs service life of the grinding roller and the grinding disk processed by overlaying. The service life of the grinding roller and the grinding disk processed by the overlaying is improved by 1.5 to 2 times than that processed by open arc overlaying; and the cladding efficiency is improved by 10 to 20 percent so as to save the overlaying wirematerial. The open arc overlaying wire material has light fume and less molten metal spatter in the process of overlaying, and a weld pass is smooth after the material is molded.

Description

【Technical field】 [0001] The invention belongs to the field of surface engineering surfacing welding repair processing, and relates to a strong wear-resistant open arc surfacing wire material for grinding rollers and discs, which can be widely used in various wear-resistant machinery in coal, electric power, metallurgy, machinery, chemical industry and other industries. On abrasive parts, it can be used for overlay welding repair and manufacture of new wear-resistant parts. 【Background technique】 [0002] Due to the rapid development of the national economy, the urgent demand for electric energy has promoted the rapid development of my country's power plant boiler manufacturing industry. In recent years, power plant boilers have developed towards supercritical and ultra-supercritical. Compared with conventional supercritical units, ultra-supercritical units have higher thermal efficiency and can save fuel by at least 4-5%. The new generation of large-capacity ultra-supercri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/22B23K35/36
Inventor 周华荣胡小海
Owner JIANGXI HENGDA HI TECH CO LTD
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