Ha baenjiniere ba hlakisa fektheri e entsoeng ka tšepe ea tšepe e lahlang moetsi Litharollo, ha li reke likarolo feela - li boloka botsitso ba libaesekele tlas'a libaesekele tse futhumetseng, ho lumellana ha microstructural ho pholletsa le lihlopha tse 500, le ho se mamelle porosity 'meleng ea li-valve tse phahameng. Re bone merero e mengata haholo e liehisoa ke barekisi ba nkang ts'ebetso ea matsete e le mokhoa o lekanang le o mong-haholo-holo ka litšepe tse bohlooho le tsa ductile, moo taolo e lekanang le k'habone, litekanyetso tsa hlobo ea preheat, le taolo ea phoka mohahong oa likhetla ka ho toba li laela machinability le bophelo ba mokhathala.
Hobaneng ha Cast Iron e Batla ho Feta Feela Mothehi
Tšepe ea tšepe ha e "bonolo ho lahla" hobane feela e phalla hantle. graphite morphology ea eona - li-flakes ka tšepe e 'mala o moputsoa, li-nodule ho ductile - li arabela hantle ho sekhahla sa ho pholisa, nako ea ho kenya ente, esita le mongobo o teng nakong ea kopano ea boka ba boka. Setsing sa rona se lumellanang le ISO Qingdao, re tšoara karolo e 'ngoe le e' ngoe joalo ka liteko tsa metallurgical: litifikeiti tsa thepa e tala tse netefalitsoeng pele li kenngoa, sebōpi se qhibiliha se lateloa ke pono ea nako ea sebele, le hlobo ea likhetla e phehiloeng ka 1,100 ° C ka nako ea ho lula ea metsotso e 30-eseng hobane maemo a bolela joalo, empa hobane re fokotsa ho fokotseha ha micro2%. 1,050°C bakeng sa >25 metsotso.
Re fane ka li-valve tse fetang 470 bakeng sa lisebelisoa tsa hydraulic tse sebetsang ho 420 bar-ha ho le e 'ngoe e hlōlehileng tšebeletsong. Hobaneng? Hobane ha re emise ASTM A536 kapa GB/T 1348. Re netefatsa nodularity ka ho hlahloba setšoantšo ka lekhetlo le leng le le leng la boraro, re tsamaisa mekoallo e tsitsitseng ho tloha ho tšela e tšoanang le karolo ea tlhahiso, le li-gradients tsa boima ba 'mapa ho pholletsa le marako a matlo a li-cylinder ho sebelisa lisebelisoa tse 12 tsa Rockwell C. Ke kamoo u tšoarang sebaka se pholileng se pholileng se fetolang lebota la 30-mm hore e be sebopeho se brittle.
Moo Investment Casting e otlang lehlabathe-le ha e sa etse joalo
Ts'ebetso ea matsete e fana ka mamello e lekaneng ea ± 0.05 mm le Ra 1.6 µm as-cast surface - e bohlokoa bakeng sa matlo a li-cylinder pump piston moo seal groove geometry e laelang litekanyetso tsa ho lutla. Empa re bolella bareki esale pele: haeba boima ba karolo ea hau bo feta 45 kg kapa bo na le liphaseje tse ka hare tse bophara ho feta 8 mm, ho lahla lehlabathe hangata ho fana ka botsitso ba mantlha le litšenyehelo tse tlase ka kilogram. Re tlohile ho qotsitsoeng moo lehlabathe le neng le tla fana ka botsitso bo tiileng ba lebota-hobane botšepehi bo thibela ho hloleha ha masimo.
Mosebetsi oa rona oa lebasetere o koala lekhalo. Mohlala: lirolara tsa winch center shaft li qala e le invest-cast ductile iron (ASTM A), ebe li sebelisa CNC ho bulela lilaete tsa 5-axis ho likoranta tsa 'nete tse ka hare ho 0.015 mm TIR. Phekolo ea mocheso e latela-ho tima ho 890 ° C, ho futhumala ho 620 ° C-ebe ho thunngoa peening ho susumetsa + 280 MPa holim'a khatello ea maikutlo. Sephetho? Bophelo ba shaft bo atolositsoe ka 3.7 × lits'ebetsong tsa likoloi tsa boenjineri tsa kantle ho naha moo grit e tletseng letsoai e potlakisang ho cheka.
Tse 'ne Tse sa Buisanoeng ka Tlhahiso e Phahameng ea Ts'ebetso ea Ts'epe ea Cast
Leha e le efe fektheri e entsoeng ka tšepe ea tšepe e lahlang moetsi ho batla ho tšepahala ho tlameha ho bonts'a litsamaiso tsena tse 'ne:
- Traceability ea lintho tse bonahalang ho fihlela palo ea mocheso-e seng feela li-mill certs, empa litlaleho tsa spectral retest bakeng sa Si, Mn, P, S, le Cu/Ni/Cr tse setseng sehlopheng se seng le se seng;
- Netefatso ea botšepehi ba khetla-re sebelisa tlhahlobo ea ho lutla ha helium ho li-castings tse se nang letho, eseng feela tlhahlobo ea pono;
- Ts'ebetso ea ho lebela liheke-CMM e hlahloba ka mor'a ho tlosa boka, ka mor'a ho thunya, le ka mor'a ho thunngoa-pele ho qala ho sebetsa;
- Netefatso e sebetsang ho lisebelisoa tsa liteko-'mele ea li-valve e lekoa ka khatello e lekantsoeng ea 1.5 ×; pompo housings spin-e leka-lekaneng ho sehlopha sa G2.5.
Re hana 8.3% ea likhatiso tsa sengoloa sa pele-eseng bakeng sa mefokolo ea litlolo, empa hobane li-callout tsa GD&T tse holim'a li-flange li feta mamello ea 0.03 mm. Taeo eo e tsoela pele ho ea ho li-volume tse mahareng: sistimi ea rona ea kemiso e fokolang e fana ka nako ea "buffer" bakeng sa litokiso tsa khetla-dry-cycle ha mongobo oa monsoon o nyoloha ka holimo ho 75% RH. Hobane ho lahla ha ho mabapi le boemo ba leholimo bo phethahetseng-e mabapi le ho laola mefuta-futa eo u ka e lekanyang.
Seo Baenjineri Ha e le Hantle ba se Hlokang—Eseng Seo Libukana Se Tšepisang
U hloka ho hlakisoa mabapi le li-trade-offs tsa nako ea pele: ho etsa matsete ho eketsa libeke tse 2-3 bakeng sa lisebelisoa le kaho ea likhetla, empa ho tlosa machining a bobeli ho 68% ea likarolo moralong oa rona oa motheo oa pompo. U hloka pepeneneng mabapi le ho lumellana ha cobalt-alloy - re lula re akhela AMS 5387 hammoho le ductile iron ho li-gate tse arolelanoang, empa feela ka mor'a ho netefatsa ho se lumellane ha katoloso ea mocheso ka papiso e lekanyelitsoeng ea karolo e ka pele ea ho tiisa. U hloka motho ea tla tšoaea likhohlano tsa GD&T pele ho nako: re fumane mamello ea 0.02 mm ka lesoba la limilimithara tse 12 le neng le hloka hore morero oohle oa datum o tlosoe sebakeng se seng—ho boloka $24k ho li-castings tse lahliloeng.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. ha e rekise li-castings. Re rarolla mekhoa ea ho hloleha ho sebetsa - litsela tse lutlang, ho sotheha ha mocheso, ho roala ha tšepe - ka ho hokahanya metallurgy, process physics, le meralo ea mochini. Matla a rona a ho etsa lintho tse fokolang, empa ho li etsa ka ho pheta-pheta ho tlalehiloeng: ho tloha ho li-nozzles tsa T800 tsa cobalt tse sebetsanang le slag e qhibilihisitsoeng ea 650 ° C ho ea ho likheo tsa pompo tsa tšepe tse pholohileng lilemo tse 15 tsa ho romelloa ka ntle ho naha ntle le ho senya.
Haeba morero oa hau o latelang o hloka fektheri e entsoeng ka tšepe ea tšepe e lahlang moetsi bokhoni bo itšetlehileng ka tekanyo-eseng ea ho bapatsa-qala ka tlhahlobo ea ho taka. Re tla u joetsa hore na ho ka etsoa eng, ke eng e hlokang ho hlophisoa bocha, le moo kotsi e lulang teng. Eseng ka mantsoe a sa hlakang. Ka li-micron, megapascals, le linomoro tsa mocheso oa thepa.
