Zvishandiso zve Supersonic Sprayed Nickel-Chromium-Chromium Carbide Coatings

Supersonic yakapfapfaidza nickel-chromium-chromium carbide (NiCr-Cr₃C₂) machira, ane yakanakisa-yepamusoro-tembiricha kupfeka, ngura, uye kusamira kwevhu, inoita basa rakakosha mukudzivirira zvakakosha zvikamu mumaindasitiri akasiyana siyana. Izvi zvinotevera ongororo yezvakajairwa mashandisirwo mamiriro uye chaiwo mhedzisiro:

I. Simba uye Simba Equipment
1. Boiler "Four-Tube" Dziviriro
- Muzvidyarwa zvemagetsi zvinopisa uye mabhoilers emubhedha ane mvura, machubhu emvura-madziro, machubhu anopisa, machubhu ekudzoreredza, uye machubhu economizer ari pasi pekukukurwa kwenguva refu negasi rinopisa uye dota remarasha, zvichikonzera kupfeka kwepagore kunosvika 1.5-2.0 mm.
- Mushure mokupfapfaidza NiCr-Cr₃C₂ coatings (ukobvu 0.3-0.6 mm), kupfeka kunoderedzwa kusvika 0.03-0.2 mm / gore, kuwedzera hupenyu hwebasa kusvika kumakore manomwe uye kuderedza nguva isina kurongeka inokonzerwa nekuputika kwechubhu. Yakajairika maitiro: Supersonic arc spraying (HVOF) uchishandisa poda yakavharwa ine Cr₃C₂ ye75% -80% yekuwedzera coating homogeneity uye decarburization kuramba.

2. Turbine uye Gasi Turbine Zvikamu
- Kuyerera-kuburikidza nezvinhu zvakadai sematurbine blades uye ekutungamira vanes anotapukirwa necavitation uye kukuvara kwekukukurwa mumvura ine jecha.
- Nekuwedzera zvinhu zvakaita seNb uye Ta (1-5%), iyo yekupfeka inovandudza fretting kupfeka uye cavitation kuramba, zvichiita kuti ive yakakodzera kune hydropower uye gasi turbine blades.

II. Aerospace uye High-End Equipment
1. Injini Brush Seal Runways
-Mucompressor uye turbine rotor zvisimbiso, iyo yekupfekedza inofanirwa kuve neyese yakakwira bond simba (43-47.6 MPa) uye yekuzvinyudza.
- Kuwedzera mafuta akasimba akadai seCaF₂/BaF₂ (yakasara) inogadzira iyo inodziya yekudziya yega yega, inoderedza kurasika kwebhurashi uye kuchinjira kumamiriro ekushanda ari pasi pe800 ° C. - Muenzaniso maitiro parameters: pfapfaidzo kureba 340-360 mm, okisijeni kuyerera 1750-1800 L/h, parafini kuyerera mwero 5.3-5.5 gal/h.

2. High-temperature alloy chikamu chekudzivirira
-Inoshandiswa pacompressor blade tenons, mapini ekumhara giya, zvichingodaro, kuramba kupfeka kushushikana uye kupisa-kupisa oxidation.

III. Petrochemical uye Inorema Machina

1. Drilling uye Fluid Equipment
-Zvikamu zvakaita semafuta ekudhira makora, epakati, uye madhaka pombi liner anotarisana nekurwiswa kuviri kubva mukukukurwa kwegrit uye corrosive media.
- Iyo yekuputira yekudzivirira ngura ndeye 30 nguva iyo yesimbi isina tsvina (mune dilute sulfuric acid nharaunda), kuwedzera erosion kupfeka hupenyu ne3-5 nguva.
-Kune mavharuvhu ekuisa chisimbiso uye makemikari pombi impellers, inoramba iyo synergistic mhedzisiro yeasina kusimba asidhi midhiya uye chidimbu kupfeka.

2. Compressor uye Screw Repair
-Kupfapfaidza pacompressor screws uye hydraulic cylinder piston rods kunoderedza kukweshera uye kupfeka, kutsiva yakakwira-mutengo wesimbi isina tsvina.

IV. Kugadzira Mapepa uye Textile Machina
1. Kuomesa Cylinders uye Roller Zvikamu
- Mushure mekupfapfaidza kupfapfaidza, kuomarara kwepamusoro kwemasilinda ekugadzira mapepa kunosvika HRC35-46 (HB330-420), kuderedza coefficient yekukwenya uye kupfeka blade. Izvi zvinoderedza kugaya kubva kumwedzi mitanhatu kusvika kumakore 3-4, kuwedzera kugadzirwa kwepepa ne30%.
-Roller uye godet rollers mumachira emucheka anosimbiswa nemachira, achiwedzera zvakanyanya hupenyu hwavo hwekupfeka.

2. Plate Heat Exchanger Corrosion Protection
- Wide-channel heat exchanger plates anopfapfaidzwa ne 0.3-0.5 mm coating kugadzirisa nyaya dzekuora kunokonzerwa nemhinduro dze alkaline uye kuwedzera nguva dzekugadzirisa.

V. Pfungwa Huru muKuitwa kweNzvimbo
1. Powder Selection
- Coated powders (75-80% Cr₃C₂ + 20-25% NiCr) inosarudzwa, ine chidimbu che ≥70% -325 mesh uye kuyerera kwe

2. Surface Pretreatment

- Sandblasting kusvika kuSa3 giredhi, ine roughness ye50-80 μm. Kupfapfaidza kunofanira kupedzwa mukati memaawa 3-4 mushure mekuputika kwejecha.

3. Kumwaya Parameter Kudzora
- HVOF flame velocity ye1500-2000 m/s uye tembiricha ye2900-3100 ° C kuti inhibit carbide decomposition (decomposition rate

Summary
Nickel-chromium carbide coatings, kuburikidza neyavo "yakaoma chikamu + binder chikamu" synergistic dhizaini (Cr₃C₂ yekupfeka kuramba + NiCr yekupokana kwekuora), uye inofambiswa neiyo supersonic yekupfapfaidza tekinoroji, yakanakira kugadzirisa kugarisana kwekupisa kwakanyanya, ngura, uye kupfeka. Zvishandiso zvavo zvinotovhara zvikamu zvakakosha senge simba, ndege, uye indasitiri inorema. Zvichaitika mune ramangwana zvinosanganisira nanocomposites (zvakadai sekuwedzera kweB₄C) uye maitiro ehungwaru kuti awedzere kukunda bhodhoro rekudzivirira kwenguva refu munzvimbo dzakanyanyisa.