CN101870027B - Method for manufacturing high-chromium alloy overlaying composite abrasion resistant plate - Google Patents

Method for manufacturing high-chromium alloy overlaying composite abrasion resistant plate Download PDF

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Publication number
CN101870027B
CN101870027B CN2009100820936A CN200910082093A CN101870027B CN 101870027 B CN101870027 B CN 101870027B CN 2009100820936 A CN2009100820936 A CN 2009100820936A CN 200910082093 A CN200910082093 A CN 200910082093A CN 101870027 B CN101870027 B CN 101870027B
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welding
plate
built
abrasion resistant
self
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Expired - Fee Related
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CN2009100820936A
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CN101870027A (en
Inventor
王清宝
刘景凤
白波
蒋旻
汤春天
王立志
石立鹏
周德成
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Central Research Institute of Building and Construction Co Ltd MCC Group
China Jingye Engineering Corp Ltd
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MCC WELDING TECHNOLOGY Co Ltd
Central Research Institute of Building and Construction Co Ltd MCC Group
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Abstract

The invention discloses a method for manufacturing a high-chromium alloy overlaying composite abrasion resistant plate and relates to an abrasion resistant plate technology. The front of a contact tube of a self-protecting flux-cored wire is provided with a powder feeding device; while swinging and overlaying, the self-protecting flux-cored wire, a spray cooling device and a scraping plate synchronously swing; when visible arc swing overlaying is carried out, the spray cooling device sprays cooling water, a powder feeding pipe conveys alloy powder out, and the alloy powder is uniformly distributed on the upper surface of the abrasion resistant base plate by the scraping plate; and the self-protecting flux-cored wire is mixed with the alloy powder, the ratio of the mass of the alloy powder to the mass of the welding wire is larger than 0.8, the mixture is distributed on the surface of the abrasion resistant base plate by visible arc overlaying to form an abrasion resistant layer, thus the composite abrasion resistant plate is obtained. The method of the invention has simplicity, easy operation, low cost, good water-cooling effect, guarantee of oriented growth of carbide and even as well as fine cracks, and the product has dual performances of a high-hardness material and a ductile material and long service life.

Description

The manufacturing approach of high-chromium alloy overlaying composite abrasion resistant plate
Technical field
The present invention relates to the wearing plate technical field, is a kind of manufacturing approach of high-chromium alloy overlaying composite abrasion resistant plate.
Background technology
Because of the metal part loss that causes that is worn is serious, according to incompletely statistics, the annual weight metal because of the mechanical wear loss in the whole nation reaches more than 1,000,000 tons in industrial and mining enterprises; The loss that equipment overhauls because of shutdown and the replacing spare part causes on the other hand also is quite serious.
Wear-resistant composite board is to make the very ideal material of the following work of serious condition liner that weares and teares; This wear-resistant composite board surface by 40~70% chromium carbide (Vickers hardness 1650V)---the high hardness wear-resisting skeleton is evenly distributed on toughness and forms on the austenite structure preferably; The macrohardness of composite plate is 55-62HRC, and accurately numerical value depends on the different-thickness of composite bed.The general medium carbon steel that uses is as substrate.The moulding of so easy moulding, particularly complicated shape.And has unique absorption impact capacity.
Wear-resistant composite board is applicable to the liner plate protection with the parts easy to wear of direct friction such as silt, ore, dust, cinder.Industries such as metallurgy, building materials, electric power, mine, cement be can be widely used in, as slag grinding factory, powder feeding machine stator blade are widely used in; Power plant's coal mill inlet square knuckle, cement plant preheating machine outlet windmill, cement mill Vertical Mill inlet hopper; Grinding machine roller guard shield, steel mill coke jarring machine sieve plate, steel mill blast furnace inwall; Power plant's coal pulverizer feed pipe, the parts of plant equipment such as grog storage cylinder blanking awl.
Make three types of the general branches of wearing plate both at home and abroad:
1, is fused to the hypereutectic alloy composite plate that constitutes on the suitable iron and steel substrate by chromium carbide alloy metallographic up to 40~60%.But the method complex process, application quantity is little.
2, built-up welding: present of home make wearing plate is made through built-up welding mostly, and built-up welding is divided into two kinds of submerged arc overlay welding and open arc built-up welding.
The general powder formula of diving that adopts of submerged arc overlay welding is swung the compound manufacturing of wearing plate, and application quantity is bigger.Adopt the compound manufacturing of powder formula submerged arc swing wearing plate of diving, cost is low, but is difficult for realizing water-cooled, and cooling velocity is slow, and the carbide non-directional growth in the deposited metal has had a strong impact on service life.
The open arc built-up welding is adopted more extensive, mainly contains two kinds of swing and non-swings.These two kinds of methods mainly adopt high carbon ferro-chrome self-protection flux-cored wire overlaying composite abrasion resistant plate.Adopt open arc welding, be easy to realize water-cooled, but will reach the deposited metal composition; Must improve the alloying component in the flux-cored wire; Because the filling rate of flux-cored wire is certain, need fill the higher chromium carbide of price for obtaining more chromium carbide in the deposited metal, abandons low price but the few high carbon ferro-chrome of carbide content; Seriously strengthened cost, profit is little.
3, spraying: the alloy powder or the welding wire of high rigidity directly are sprayed onto on the wearing plate, because thickness is little, application quantity still less.
Summary of the invention
The objective of the invention is to overcome the defective of prior art; A kind of manufacturing approach of high-chromium alloy overlaying composite abrasion resistant plate is disclosed, simple, cost is low, good water-cooling effect; Guarantee the oriented growth of carbide; And all even refinement of crackle, product has the dual performance of high hard material and toughness material, long service life.
For achieving the above object, technical solution of the present invention is:
A kind of manufacturing approach of high-chromium alloy overlaying composite abrasion resistant plate is the improvement on open arc swing built-up welding basis, and equipment comprises self-protection flux-cored wire, ignition tip, spray cooling device, workbench and power supply; Wear-resisting parent plate is pressed solidly in worktable upper surface with pressing plate, start power supply, carry out open arc swing bead-welding technology; It is provided with a following powder device in self-protection flux-cored wire ignition tip front, the following tube cell of following powder device is vertical with wear-resisting parent plate, the intrinsic scraper plate in following tube cell lower end, one side of scraper plate and the parallel contact of wear-resisting parent plate upper surface;
When carrying out open arc self-protection flux-cored wire swing built-up welding, transfer out alloyed powder in the following tube cell, alloyed powder promptly is evenly distributed in wear-resisting matrix single track built-up welding surface by scraper plate, utilizes self-protection flux-cored wire built-up welding heat melts, forms the built-up welding deposited metal jointly; Spray cooling device ejection cooling water, cooling built-up welding deposited metal;
In the weld deposit process, the quality of interior self-protection flux-cored wire fusing of unit interval and the relation of alloyed powder fusing are: the quality of the quality/welding wire of alloyed powder>0.8, built-up welding forms wearing layer on wear-resisting parent plate surface, gets abrasion-proof composite plate.
Described method, the wide 30~50mm of abrasion-proof composite plate single-run welding of its said built-up welding, single-layer surfacing layer thickness 3.5~6.5mm.
Described method, its said self-protection flux-cored wire, the carbon content of selling ZY-YD440-O self-protection flux-cored wire or sale on the market for China Metallurgical Group Construction Research Institute is higher than 4.0%, and chromium content is higher than 22% high carbon ferro-chrome self-protection flux-cored wire.
Described method, its said alloyed powder is meant: the phosphorus content of selling on the market is higher than 7%, and chrome content is higher than 59% high-carbon chromium iron; This high-carbon chromium iron can mix use each other with other alloyed powder as required, but high-carbon chromium iron shared degree in mixed powder is higher than 85%.
Described method, its said other alloyed powder is ferro-boron, graphite mixture.
Described method, it is said when carrying out open arc swing built-up welding, also has another strand cooling water to flow through wear-resisting parent plate surface on the workbench, and workpiece is cooled off.
Described method, its said another strand cooling water is on the inside groove relative angle of flute profile workbench, respectively establishes a water inlet, a delivery port, and water is circulated.
Adopting the advantage of the abrasion-proof composite plate of the inventive method manufacturing is (following numerical value is the two-layer numerical value that records of single face built-up welding):
The carbide volume is up to 50-70% in the built-up welding deposited metal, and for wearing plate provides good hardness and wearability: the built-up welding macrohardness is 58-64HRC, single-layer surfacing layer thickness 3.5~6.5mm, and finished surface is smooth-and coefficient of friction is low; High wear resistance: wear test shows, wearability than the high 12-18 of mild steel doubly, and is higher 5 times than stainless steel, potassium steel, higher 1 times than As-cast High Cr iron;
Owing to adopt the middle low carbon steel substrate, have the dual performance of high hard material and toughness material, can bear durative moderate and impact, demonstrated fully the not only wear-resisting but also shock proof advantage of composite.
The high-quality price is low: the invention reside in and use low self-shield high carbon ferro-chrome welding wire of applied cost and the low high-carbon chromium iron of price that wear-resisting skeleton---the carbide of more high rigidity is provided simultaneously; Adopt water-cooled up and down simultaneously, the hardness of wearing plate and wearability are improved.Solved like this and made the reduction of hardfacing composite plate cost, profit is high.Because reasonable utilization of materials, so the hardfacing composite plate that this kind method is made, for example: carbide volume content is about 60% wearing plate, and than all high 2HRC of wearing plate hardness of equivalent material submerged arc overlay welding, wearability is all high 1.2 times, and the built-up welding price is similar; The wearing plate price low 60% that does not add the built-up welding of powder open arc than equivalent material.
The wide 30-50mm of built-up welding composite plate single-run welding; The wearing layer surfacing; Wearing layer discharges stress through forming the tiny and uniform crack in weld deposit process, keeps the smooth of view picture plate face, and restriction produces stress and concentrates; The crack only is confined in the hard formation, also can in the good middle low carbon steel plate of toughness, not spread in the use.
Description of drawings
Fig. 1 is the manufacturing approach device therefor sketch map of high-chromium alloy overlaying composite abrasion resistant plate of the present invention, wherein:
Figure 1A is the device therefor side view;
Figure 1B is the device therefor vertical view.
The specific embodiment
The manufacturing approach of high-chromium alloy overlaying composite abrasion resistant plate of the present invention uses the equipment of this method manufacturing overlaying composite abrasion resistant plate as shown in Figure 1.Add a following powder device 1 in self-protection flux-cored wire 2 ignition tip fronts, the back is a spray cooling device 3.Wear-resisting parent plate 5 is pressed solidly in workbench 4 upper surfaces by pressing plate 6.The following tube cell 11 of following powder device 1 is vertical with wear-resisting parent plate 5, and there is scraper plate 12 following tube cell 11 lower ends, one side of scraper plate 12 and the parallel contact of wear-resisting parent plate 5 upper surfaces.The spray cooling device 3 of self-protection flux-cored wire 2 back, when work to wear-resisting parent plate 5 surface spray shape cooling waters 31.
On the inside groove relative angle of flute profile workbench 4, respectively establish a water inlet 41, a delivery port 42, another strand cooling water is circulated.During work, strand cooling water of another on the workbench flows through wear-resisting parent plate 5 upper surfaces, and workpiece is cooled off.
The inventive method is improved a kind of new technology on the basis of open arc swing built-up welding: the manufacturing approach that adds powder formula open arc swing high-chromium alloy overlaying composite abrasion resistant plate.Be to adopt the swing built-up welding; Under welding wire 2 ignition tip fronts, transfer out alloyed powder 13 in the following tube cell 11 of powder device 1, alloyed powder 13 compositions mainly are high carbon ferro-chromes, or a certain amount of ferro-boron of interpolation, graphite are formed in the high carbon ferro-chrome; Ferro-boron, the quantity of graphite of adding, in percentage less than 15%; Adopt the low high carbon ferro-chrome self-protection flux-cored wire 2 of common price, be higher than 4.0% like the China Metallurgical Group Construction Research Institute YJ440-O self-protection flux-cored wire or the phosphorus content that can buy on the market, chromium content is higher than 22% high carbon ferro-chrome self-protection flux-cored wire.Carry out weave bead welding; During swing; Alloyed powder and welding wire quality cooperate by a certain percentage in unit interval; Usually quality>0.8 of the quality/welding wire of alloyed powder (look bead-welding technology and built-up welding deposited metal and decide) guaranteed that so promptly the deposited metal alloying component makes price obviously descend again, helps the competition in market.During work, wear-resisting parent plate 5 top and bottom add water-cooled but simultaneously, guarantee the oriented growth of carbide, when making all even refinement of crackle, have increased the wearing layer hardness of built-up welding, have reduced the distortion of complex abrasion-proof board finished product; And can enhance productivity, improve the mechanical performance of material.But parent plate 5 single face built-up welding also can two-sided built-up welding, and built-up welding thickness can be decided according to user's request.
The inventive method adopts efficient built-up welding special equipment, uses high-carbon open arc self-protection flux-cored wire, and built-up welding forms wearing layer on common carbon steel board, built-up welding individual layer case hardness HRC 58~64, and wearability is 15-20 a times of common carbon steel board.Wearing layer is main with high chromium, also has compositions such as manganese, molybdenum, niobium simultaneously, and the double carbide of formation at high temperature has very strong stability, still can keep higher hardness, also has good antioxygenic property simultaneously, can normally use fully below 500 ℃.Between wearing layer and the parent plate 5 is metallurgical binding; The high rigidity carbide is evenly distributed on the high tenacity parent plate 5; Have the fundamental characteristics of the composite of high rigidity and high tenacity, shock resistance is fairly good, and product of the present invention is at aspects such as wear-resistant, high tenacity, shock resistances; The contrast similar products at home and abroad, combination property is best.

Claims (1)

1. the manufacturing approach of a high-chromium alloy overlaying composite abrasion resistant plate is the improvement on open arc swing built-up welding basis, and equipment comprises self-protection flux-cored wire, ignition tip, spray cooling device, workbench and power supply; Wear-resisting parent plate is pressed solidly in worktable upper surface with pressing plate, start power supply, carry out open arc swing bead-welding technology; It is characterized in that: be provided with a following powder device in self-protection flux-cored wire ignition tip front, the following tube cell of following powder device is vertical with wear-resisting parent plate, the intrinsic scraper plate in following tube cell lower end, one side of scraper plate and the parallel contact of wear-resisting parent plate upper surface;
When carrying out open arc self-protection flux-cored wire swing built-up welding, transfer out alloyed powder in the following tube cell, alloyed powder promptly is evenly distributed on the wear-resisting matrix single track built-up welding surface by scraper plate, utilizes self-protection flux-cored wire built-up welding heat melts, forms the built-up welding deposited metal jointly; Spray cooling device ejection cooling water, cooling built-up welding deposited metal surface;
In the weld deposit process, the quality of interior self-protection flux-cored wire fusing of unit interval and the relation of alloyed powder fusing are: the quality of the quality/welding wire of alloyed powder>0.8, and built-up welding forms wearing layer on wear-resisting parent plate surface, gets abrasion-proof composite plate;
Wide 30~the 50mm of abrasion-proof composite plate single-run welding of said built-up welding, single-layer surfacing layer thickness 3.0~6.5mm;
Said alloyed powder is meant: the phosphorus content of selling on the market is higher than 7%, and chrome content is higher than 59% high-carbon chromium iron;
Said when carrying out open arc swing built-up welding, also have another strand cooling water to flow through wear-resisting parent plate lower surface on the workbench, workpiece is cooled off;
Said another strand cooling water is on the inside groove relative angle of flute profile workbench, respectively establishes a water inlet, a delivery port, and water is circulated.
CN2009100820936A 2009-04-22 2009-04-22 Method for manufacturing high-chromium alloy overlaying composite abrasion resistant plate Expired - Fee Related CN101870027B (en)

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CN101376190A (en) * 2007-08-31 2009-03-04 刘振英 Overlaying welding method and apparatus for transitional powder electric arc deposited abrasion resistance material with additional forming carbides

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