Ha litsamaiso tsa haeteroliki li hloleha litsing tsa oli tse lebopong la leoatle—kapa ha lipompo tsa metsi li tšoara limela tsa metsi a litšila tse nang le letsoai le lengata—ke seoelo sesosa se ka sehloohong e leng moralo. Ke corrosion. Eseng mafome a bokaholimo. Eseng cosmetic pitting. Re bone matlo a li-valve a robeha ka mor'a likhoeli tse 18 libakeng tse nang le chloride e ngata, leha ho na le lintlha tsa tšepe tse sa hloekang tse hatisitsoeng setšoantšong. Ke ka lebaka leo lienjiniere tsa Amerika Leboea le Europe joale li botsang potso e le 'ngoe pele: Feme ea likarolo tse hananang le ho bola e lula hokae ka har'a ketane ea hau ea thepa?
Khanyetso ea kutu ha se seaparo-e hahiloe ka har'a alloy, ts'ebetso le boikarabello.
Khanyetso ea 'nete ea kutu e qala pele mochini o qala. E phela tumellanong ea metallurgical ea AMS 5387 cobalt alloy-moo ho fapana ha carbon batch-to-batch tlas'a 0.02% ho etsang phapang pakeng tsa lilemo tse 5 tsa tšebeletso le microcracking pele ho nako. E lula ka har'a li-nozzles tse thehiloeng ho T800 tse bolokang botsitso ba 650 ° C ha e ntse e hanela sulfidation mehala ea khase e bolila. 'Me e phela ka taeo ea ho hana ho lahla mocheso haeba tlhahlobo ea ultrasonic e senola ho kenyelletsoa ha karolo e le' ngoe e ka holimo ho 0.3 mm.
Re netefalitse sena ho pholletsa le mefuta e 47 ea tlhahiso bakeng sa pompo ea Jeremane ea OEM: likarolo tse entsoeng ka lehlabathe ASTM A487 Sehlopha sa CA6NM se bonts'itse 3.2 × bophelo bo bolelele ba ts'ebeletso ho feta lijeometri tse ts'oanang tse tsoang ho morekisi ea sebelisang remelt e sa netefatsoang. Hobaneng? Traceability. Lotho e 'ngoe le e' ngoe ea ho qhibiliha e na le litlaleho tse felletseng tsa PMI, li-curve tse thata, le data ea tlhahlobo ea "intergranular corrosion" - eseng setifikeiti sa leloala feela.
Boemo bona ba taolo bo hloka kopano e otlolohileng. Ha o khone ho ntša lisebelisoa, ebe o lebella hore mabenkele a CNC a lefelle ho kheloha ha sesebelisoa ho bakoang ke porosity. U ke ke ua itšetleha ka lihlahisoa tsa mocheso oa motho oa boraro ha ntlo ea hau ea silindara ea pompo ea piston e hloka botsofali ba mekhahlelo e 'meli ho 925°C + 725°C ka mamello ea ±3°C. Ke ka lebaka leo feme ea likarolo tse sa jeng e tlamehang ho ba le lupu e felletseng: rasiti ea lintho tse bonahalang → ho lahlela → ho imolla khatello ea maikutlo → ho sebetsa ka mokhoa o nepahetseng → phallo ea ho qetela kapa ho roala HVOF.
Mefuta e mene ea lihlahisoa-le hore na ke hobane'ng ha ba arolelana mokhoa o le mong oa ho hlōleha
Ntho e atileng haholo ea ho hloleha ho li-valve tsa khatello, li-winch center shaft rollers, le li-plug tsa cobalt alloy ha se geometry. Ke sebopeho se sa lumellaneng. Ka ho khetheha:
- Likarolo tsa mochini oa CNC ka li-callouts tse thata tsa GD & T (± 0.01 mm boemo ba mamello) empa li-substrates tse nang le khatello ea kelello e setseng> 120 MPa;
- Likarolo tsa cobalt-nickel moo liphapang tsa katoloso ea mocheso lipakeng tsa 'mele oa AMS 5387 le li-Inconel 718 tse kentsoeng li theha li-microgaps nakong ea libaesekele tse futhumetseng;
- Lisebelisoa tsa tšepe ka kabo ea nodule ea graphite e sa ts'oaneng-e lebisang ho lisele tsa galvanic tse sebakeng sa heno libakeng tse metsi tsa hydrogen sulfide;
- Lisebelisoa tsa tšepe tse sa hloekang moo sigma phase precipitation e hlahang ka lebaka la litekanyetso tse sa laoleheng tsa ho pholisa ka mor'a ho cheselletsa, eseng k'hemistri e futsanehileng.
Re ile ra tšoara bohle ba bane tlhahlobong ea morao-rao ea barekisi ba 12 ba rekang tsamaiso ea li-winch tsa likoloi tsa boenjiniere. Ke setsi se le seng feela - se nang le li-labs tsa metallography tsa ka tlung, 'mapa oa mocheso o hokahaneng le CMM, le netefatso e netefalitsoeng ea ISO 17025-e fihletseng moeli oa ts'ebetso ea kutu: ho lutla ha zero ka mor'a lipotoloho tse 2,000 350 bar metsing a maiketsetso a leoatle.
Hobaneng ha "corrosion-resistant" ha e bolele letho ntle le taeo ea ts'ebetso
Barekisi ba bang ba qotsa bokhoni ba "fektheri e hananang le kutu" - empa e fana ka ts'ebetso e tloaelehileng ea CNC. Seo se hloleha hobane:
Taba ea pele, li-alloys tsa cobalt joalo ka T800 li hloka lisebelisoa tsa carbide tse nang le li-angles tse mpe tsa 8° le pholiso ea likhohola ka khatello ea li-bar tse 65 — eseng litlhophiso tsa kamehla tsa mabenkele. Ea bobeli, li-castings tsa lichelete li hloka HIP (hot isostatic pressing) ho 1150 ° C / 150 MPa ho koala microporosity e fetohang litsela tsa electrolyte. Taba ea boraro, taba ea ho qetela ka holim'a metsi: Ra 0.4 μm setulong sa valve e fokotsa ho qala ha kutu ka 70% khahlano le Ra 1.6 μm, ho latela netefatso ea NACE MR0175/ISO 15156.
Re tsamaisa karolo e 'ngoe le e' ngoe ea cobalt ka litlhahlobo tse tharo tse ikemetseng: pre-machining (PMI + boholo ba lijo-thollo), post-machining (CMM + dae penetrant), le ho qetela (spray spray per ASTM B117 + electrochemical impedance spectroscopy). Haeba EIS e bonts'a khanyetso ea phetisetso ea tefiso e ka tlase ho 12 kΩ·cm², karolo e tsamaea ka sekepe - eseng joalo ka "e hanang ho bola," empa e le "ho hlokahala hape." Ha ho mekhelo.
Sheba ka nqane ho leqephe—sheba hore na ke eng e pholohang ho romelloa lefatšeng la 'nete
Feme ea likarolo tse hananang le ho bola e fumana sehlooho sa eona tšimong, eseng lab. Re lekola ho khutla ha masimo: 92% ea likarolo tsa pompo tsa AMS 5387 tse kentsoeng limela tsa Asia Boroa-bochabela tsa desalination li fihlile lilemo tse 4+ ntle le tlhokomelo. Ho hloleha ha Zero ho etsahetse litsing tsa 1,842 tse kentsoeng ho pholletsa le maoatle a ka tlase ho Leoatle le ka Leboea-ho sa tsotelehe ho pepeseha ho 3.5% NaCl, 12 ppm H₂S, le cyclic loading ho 700 bar.
Ho tšepahala hoo ho bakoa ke liqeto tse entsoeng pele chip ea pele e fofa: ho fumana cobalt ho tsoa libakeng tse hloekisitsoeng tse tiisitsoeng Finland-eseng stock e kopantsoeng; ho netefatsa papiso e khahlano le limmapa tsa 'nete tsa microstructure; le ho kenya libaka tsa tlhahlobo moo ho nang le mefokolo—eseng lihekeng feela. Ha o hloka likarolo tse sa kopaneng feela le ASTM G48 kapa ISO 9223 Sehlopha sa C5-I, o hloka molekane ea tšoarang corrosion resistance e le fisiks, eseng ho bapatsa.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. e sebetsa e le fektheri e hananang le ho bola e thehiloeng liphellong tse ka lekanyetsoang—eseng litšepiso. Setsi sa eona se lumellanang le ISO se Qingdao se fana ka ho nepahala ha boholo, botšepehi ba metallurgical, le traceability e ngotsoeng bakeng sa likarolo tse sebetsang moo ho hlōleha e seng khetho. Bakeng sa litharollo tsa bohlokoa tsa indasteri, ho tšoarella ho qala ka hore na khanyetso ea kutu e tebile hakae - e sa hlalosoa feela.
