Flux-cored wire for overlaying of water-cooled grate plate and scraper plate

A technology of scraper plate and grate plate, which is applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of wear resistance and high temperature oxidation resistance reduction, poor welding performance, and large crack tendency, etc. Achieve high resistance to strong abrasive wear performance, good application prospects, and good crack resistance

Active Publication Date: 2016-03-16
SICHUAN HONGJIAN HEAVY MACHINERY MFG
View PDF10 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the alloys used for surfacing water-cooled grate plates and scraper plates in China are generally high-Cr cast iron alloys, such as the 856-4AZ wear-resistant electrode produced by Jiangsu Qiaoshi Company. Although this alloy has high hardness, it is generally around HRC60. The abrasive wear resistance is also good, but the welding performance is poor, the crack tends to be large during surfacing, and the cracks are in the form of a network, and the alloy will fall off in blocks during use, which seriously affects the service life of the water-cooled grate and scraper
Some also use low C martensitic alloy surfacing, its composition is: C: 0.45, Si≤0.65%, Mn: 1.5%, Cr: 7.5%, Mo: 2.5%, W: 0.6%, although this solves the crack problems, but the wear resistance and high temperature oxidation resistance are greatly reduced, which cannot meet the working conditions of water-cooled grate plates and scraper plates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of the above-mentioned flux-cored welding wire mainly comprises the following steps:

[0027] A. Take the powder of the raw material of the drug core and dry it according to the composition requirements;

[0028] B. Fully mix the raw material powder to obtain the drug core powder;

[0029] C. Fill the core powder into the steel strip groove, coat and draw it into welding wire.

[0030] The composition and specifications of the outer thin steel strip of the flux-cored welding wire of the present invention are selected according to the conventional technical standards in this field, preferably following the corresponding national standards. Generally, ordinary 08F steel strip material with a specification of 0.6mm can be used.

[0031] In actual operation, ferromanganese, ferromolybdenum, ferrochrome, ferrovanadium, ferroniobium, ferrotungsten, ferric boride, iron powder and rare earth are used as basic raw materials. Ferro-titanium, magnesium po...

Embodiment 1

[0035] Ferromanganese, ferromolybdenum, ferrochrome, ferrovanadium, ferronickel, ferroniobium, ferrotungsten, ferrotitanium, ferric boride, iron powder, and rare earth are taken in a certain proportion, and the particle size is controlled within the range of 120-140 mesh. Mix well, its ingredients are:

[0036]C: 2.15% Si: 0.42%, Mn: 1.2%, Cr: 28%, Ni: 1.25%, Mo: 1.35%, V: 0.45%, W: 2.5%, Nb: 0.45%, B: 0.65%, Re : 0.80%, Ti: 0.30%, the balance is Fe and unavoidable impurities, and the sum of the weight percentages of the above components is 100%.

[0037] Put the powder mixture in the above ratio into the steel belt groove, and then draw it into a φ2.0mm welding wire for CO 2 Gas-shielded surfacing welding water-cooled grate plate and scraper plate. The results show that the high temperature oxidation resistance of the surfacing alloy is 10 to 12 times that of Q235 steel, the wear resistance is 23 to 25 times that of Q235 steel, and the crack resistance is better, that is, c...

Embodiment 2

[0039] Ferromanganese, ferromolybdenum, ferrochrome, ferrovanadium, ferronickel, ferroniobium, ferrotungsten, ferrotitanium, ferric boride, iron powder, magnesium powder, rare earth, and powder are taken in a certain proportion, and the particle size is controlled at 120~ 140 mesh range, mix evenly, control its composition as follows:

[0040] C: 2.35% Si: 0.55%, Mn: 1.2%, Cr: 28%, Ni: 0.85%, Mo: 1.2%, V: 0.45%, W: 1.85%, Nb: 0.45%, B: 0.65%, Re : 0.80%, Ti: 0.12%, Mg: 0.045%, the balance is Fe and unavoidable impurities, and the sum of the weight percentages of the above components is 100%.

[0041] Put the powder mixture in the above ratio into the steel belt groove, and then draw it to make a φ2.0mm welding wire for CO 2 Gas-shielded surfacing welding water-cooled grate plate and scraper plate. The results show that the surfacing alloy has good high temperature oxidation resistance, excellent wear resistance, good crack resistance, and the hardness after annealing is abov...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
elongationaaaaaaaaaa
elongationaaaaaaaaaa
elongationaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of welding machines and specifically relates to a flux-cored wire for overlaying of a water-cooled grate plate and a scraper plate. The present invention intends to solve the technical problem of poor properties of the existing flux-cored wire for the overlaying of the water-cooled grate plate and the scraper plate. The flux-cored wire for the overlaying of the water-cooled grate plate and the scraper plate provided by the present invention comprises a flux core and an outside wrapping steel strip; the flux core part contains the following components in percentage by weight: 1.75-2.85% of C, 0.25-0.65% of Si, 0.55-1.75% of Mn, 23-32% of Cr, 0.50-1.65% of Ni, 0.82-2.5% of Mo, 0.21-0.65% of V, 1.91-4.23% of W, 0.25-0.72% of Nb, 0.45-0.96% of B, 0.21-1.22% of Re, and the balance of iron and inevitable impurities. The overlaying alloy of the flux-cored wire of the present invention is capable of greatly prolonging the service life of the water-cooled grate plate and the scraper plate, and has a bright application prospect.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a flux-cored welding wire used for surfacing welding of water-cooled grate plates and scraper plates. Background technique [0002] Flux-cored wire is one of the categories classified by manufacturing method and wire shape. Flux-cored welding wire is a welding wire made by wrapping powder in a thin steel strip and rolling it into different cross-sectional shapes. Flux cored welding wires are usually divided into three types: gas shielded welding, self shielded welding and submerged arc welding. At present, it is widely used in the field of steel structure manufacturing and alloy surfacing. [0003] Water-cooled grate plate and scraper plate are the key spare parts of important metallurgical equipment. Their quality and service life are directly related to the amount of molten iron and steel output of the steel plant. The water-cooled grate plate and the scraper pla...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/406
Inventor 李强樊朝阳王青
Owner SICHUAN HONGJIAN HEAVY MACHINERY MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap