CN101935816B - Special flux-cored electric arc spraying wire for garbage incinerator - Google Patents
Special flux-cored electric arc spraying wire for garbage incinerator Download PDFInfo
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- CN101935816B CN101935816B CN201010285132.5A CN201010285132A CN101935816B CN 101935816 B CN101935816 B CN 101935816B CN 201010285132 A CN201010285132 A CN 201010285132A CN 101935816 B CN101935816 B CN 101935816B
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- garbage incinerator
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Abstract
The invention relates to a thermal spraying material, in particular to a special flux-cored electric arc spraying wire for a garbage incinerator, belonging to the technical field of erosion resistant materials. The wire comprises the following components in percentage by mass: 45.0-55.0 percent of W, 22.0-27.0 percent of Ni, 8.0-11.0 percent of Cr, 7.0-9.0 percent of Fe and 6.0-7.5 percent of Co. The wire can automatically generate a layer of compact WC and Cr3C2 film in a carbonic atmosphere at high temperature and generate a layer of compact SiO2 and Cr3O2 film in an oxygen-contained atmosphere at high temperature so as to resist carburization and sulphidation attack. The pit corrosion resistance index PREN of the component of the material exceeds 80 and has very excellent inoxidizability, chloride resistance and fluoride corrosion resistance. Since a spraying coating has higher high-temperature strength, the characteristics of very good abrasive resistance, and the like are shown. The coating can form metallurgical bonding in the service process, hole sealing is not needed, and the service life of the garbage incinerator can be obviously prolonged.
Description
Technical field
The present invention relates to a kind of thermal spraying material, particularly a kind of special flux-cored electric arc spraying wire for garbage incinerator, belong to erosion resistant technical field.
Background technology
At present, China's rubbish processing to be harmless rate is less than 5%, and rubbish is transported to the exposed stacking in outskirts of a town, and appropriation of land, it is reported, existing more than 200 city sinks among rubbish encirclement.
Refuse treatment is to ensureing that the quality of life of modern is most important.And to burn will be process life, industry, medical treatment and mixing (as the low-activity+be harmful to) mode standard of rubbish.In this system, the Working environment of high-temperature part and low temperature part is all quite severe.When most of incineration firing, especially domestic refuse and medical waste, owing to can produce a large amount of sulfide containing various uncertain impurity, muriate and fluorochemical, these compounds at high temperature have extremely strong corrodibility to incinerator bulk material.
The tail gas burning furnace of petrochemical industry, its Main Function is S, C and H remaining in incineration tail gas
2s is also converted into SO completely
2and CO
2, assurance device emission meets air environmental requirement.It is also quite serious to the carburizing of body of heater and sulfuration, constrains the normal cycle of operation of equipment.
Development garbage incineration technology, effectively can not only suppress the growth of scrap heap storage, can also reclaim the energy from waste.Put into operation or power house of burning away the refuse under preparation in Southeastern Coastal Cities.
Market is to a kind of existing higher hot strength and Properties of High Temperature Creep being provided to have again the ability of well opposing carburizing and sulfuration to society, and the material of oxidation-resistance and resistance to muriate, fluoride corrosion very excellent capacity proposes challenge.
Summary of the invention
For the problems referred to above, the object of the invention is to provide a kind of corrosion-resistant, wear-resisting high nickel chromium triangle tungsten base arc spraying filament material, thus addresses the aforementioned drawbacks.
The present invention adopts following technical scheme to achieve these goals: a kind of special flux-cored electric arc spraying wire for garbage incinerator, described silk material by mass percentage scope comprises following composition: W45.0-55.0%, Ni22.0-27.0%, Cr8.0-11.0%, Fe7.0-9.0%, Co6.0-7.5%.
Described silk material by mass percentage scope also comprise in following composition one or more: Ti0.0-4.5%, Si0.0-3.5%, Mo0.0-4.5%, Y0.0-0.01%.
Made by following manner in the present invention:
Select suitable metal or alloy powdery components and proportioning, mix various powder, then the powder mixed is added in the effigurate U-shaped mild-carbon steel strip of tool, becomes overlap joint joint close by milling train, then pull to suitable external diameter specification.
Raw-material selection can be the powdered alloy containing various element, as ferrotungsten, and ferrosilicon, ferrotianium, molybdenum-iron, tungsten-cobalt alloy powder, tungsten nickel powder, stellite powder, cobalt chrome molybdenum tungstenalloy powder etc.; Also can be pure metal powder, as tungsten powder, nickel powder, chromium powder, silica flour, molybdenum powder, titanium valve, yttrium powder etc., when adopting powdered alloy, need the amount being converted into pure metal by purity.Different according to product external diameter, silk material filling ratio is between 35-45%.
The present invention compared with prior art has the following advantages:
The present invention automatically can generate WC and Cr of one deck densification in carbon-containing atmosphere when high temperature
3c
2film, automatically generates the SiO of one deck densification in oxygen-containing atmosphere
2and Cr
3o
2film, opposing carburizing and sulphur corrosion; The resistance to pitting indices P REN of this material composition more than 80, oxidation-resistance and resistance to muriate, fluoride corrosion very excellent capacity.Because spray-on coating hot strength is higher, present the features such as fabulous wear resistance.Coating also can form metallurgical binding in process under arms, without the need to sealing of hole, can significantly improve the work-ing life of incinerator.
Embodiment
Embodiments of the invention silk material and sprayed coating chemical composition as follows:
| W | Ni | Cr | Fe | Co | Ti | Si | Mo | Y | |
| Embodiment 1 | 51.0 | 24.0 | 10.0 | 8.0 | 7.0 | 0 | 0 | 0 | 0 |
| Embodiment 2 | 50.0 | 23.0 | 9.0 | 8.0 | 7.0 | 1.5 | 1.5 | 0 | 0 |
| Embodiment 3 | 48.0 | 22.0 | 9.0 | 8.0 | 7.0 | 2.0 | 2.0 | 2.0 | 0 |
| Embodiment 4 | 47.0 | 22.0 | 9.0 | 8.0 | 6.0 | 2.0 | 3.5 | 2.5 | 0.005 |
The coating made by above-mentioned specification has following features effect:
1. more than bonding strength 35MPa.
2. heatproof is higher than 1250 DEG C.
3. increase weight after 1000h test about 5.5mg/cm in incinerator
3.
4. in incinerator anti-corrosion capability than 304 stainless steel more than 18 times.
Spraying wire of the present invention is not restricted to the described embodiments, and any improvement in claims of the present invention protection domain and change are all in protection scope of the present invention.
Claims (2)
1. a special flux-cored electric arc spraying wire for garbage incinerator, is characterized in that, described silk material by mass percentage scope comprises following composition: W45.0-55.0%, Ni22.0-27.0%, Cr8.0-11.0%, Fe7.0-9.0%, Co6.0-7.5%.
2. special flux-cored electric arc spraying wire for garbage incinerator according to claim 1, it is characterized in that, described silk material by mass percentage scope also comprise in following composition one or more: Ti0.0-4.5%, Si0.0-3.5%, Mo0.0-4.5%, Y0.0-0.01%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010285132.5A CN101935816B (en) | 2010-09-17 | 2010-09-17 | Special flux-cored electric arc spraying wire for garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010285132.5A CN101935816B (en) | 2010-09-17 | 2010-09-17 | Special flux-cored electric arc spraying wire for garbage incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101935816A CN101935816A (en) | 2011-01-05 |
| CN101935816B true CN101935816B (en) | 2015-06-17 |
Family
ID=43389375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010285132.5A Active CN101935816B (en) | 2010-09-17 | 2010-09-17 | Special flux-cored electric arc spraying wire for garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101935816B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3669656A (en) * | 1970-05-11 | 1972-06-13 | Mallory & Co Inc P R | Tungsten base welding rod,method for making same and novel applications of same |
| US3904383A (en) * | 1970-05-11 | 1975-09-09 | Mallory & Co Inc P R | Welded structure and method |
| JPH01230759A (en) * | 1987-12-29 | 1989-09-14 | Showa Denko Kk | Composite powder for thermal spraying |
| US6503290B1 (en) * | 2002-03-01 | 2003-01-07 | Praxair S.T. Technology, Inc. | Corrosion resistant powder and coating |
| CN100451151C (en) * | 2007-04-20 | 2009-01-14 | 上海工程技术大学 | Rare earth appended surfacing alloy and surfacing technique for preparation of aluminium matrix composite material |
| CN101403085A (en) * | 2008-11-14 | 2009-04-08 | 北京工业大学 | WC-FeNiCr superhard non-magnetic coating composite material and method of producing the same |
-
2010
- 2010-09-17 CN CN201010285132.5A patent/CN101935816B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101935816A (en) | 2011-01-05 |
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