Pfupiso: Kuenzanisa kunoshanda kweStellite 6 uye Stellite 21, ichitsanangura kuti kabhoni yemukati uye tungsten-versus-molybdenum inofambisa sei kuomarara uye kuomarara kutengeserana.
Stellite 6 uye Stellite 21 ndiwo maviri ecobalt-based wear alloys anowanzo kuenzaniswa kune mumwe nemumwe. Iyo yakajairika default ndeye kutsanangura Stellite 6 pese paine kusava nechokwadi. Tsika iyoyo ine hwaro hune musoro: Stellite 6 ine nhoroondo refu yekushandisa, hunhu hwakanyorwa zvakanaka, uye ruzivo rwekugadzirisa. Asi mumamiriro maviri ezvinhu kusagadzika kunogona kuunza njodzi isingakoshi: kana chikamu chacho chikaona kukurumidza kupisa bhasikoro kana kupisa kwekutya, uye kana chikamu chine madziro akatetepa kana kamwe kamwe chikamu chinoshanduka.
Stellite 21 iripo zvakanyanya kugadzirisa kuomarara kweStellite 6 mumamiriro ezvinhu aya. Kunzwisisa kutengeserana pakati pezviviri kunobatsira pane kubata nemusoro kuti ndeipi "iri nani."
Misiyano yekuumbwa inofambisa kupatsanurwa kwekuita
Iyo gaka rekuita pakati peaya alloys rinouya pasi kune maviri ekugadzirisa sarudzo.
Carbon content. Stellite 6 inotakura yakakwira zvakanyanya kabhoni level. Pasi peSAE AMS 5387, Stellite 6 castings ine mazita ekuumbwa kwe60Co-29Cr-4.5W, ine kabhoni kazhinji mu 0.9-1.4% renji yezvakakandwa zvigadzirwa. Yakawanda kabhoni inoreva kuwanda kwakaoma carbide kunaya, iyo inosimudza zvakananga kuoma uye kupfeka kuramba. Stellite 21 ine yakawanda yakaderera kabhoni, ine mazita ekuumbwa kweinenge C ~ 0.25%, Cr 25-30%, Mo 4.5-6.5%, Ni 1.5-3.5%, balance Co. Lower carbon inoreva chikamu chepasi che carbide volume uye microstructure inotungamirirwa necobalt solid-solution matrix.
Tungsten inopesana ne molybdenum. Stellite 6 inoshandisa tungsten (W) seyayo huru yakasimba-solution inosimbisa; Stellite 21 inotsiva yakawanda yeiyo tungsten ne molybdenum (Mo). Molybdenum ine inenge hafu yehuremu hweatomu hwe tungsten, saka pahuremu humwe chete muzana inopa maatomu akapetwa kaviri. Molybdenum zvakare ine hukama hwakasimba hwekabhoni uye inosimudzira kugadzirwa kwecarbide. MuStellite 21, zvisinei, iyo yakaderera kabhoni level inodzika iyo mhedzisiro, uye mambure mhedzisiro ndeye yakaderera yakazara yakazara carbide yemukati pane Stellite 6.
Pamwe chete, misiyano miviri iyi inoburitsa maviri akasiyana maitiro ekuita.
Stellite 6: carbide density mukutsinhana nekupfeka kuramba
Iyo microstructure yeStellite 6 ine cobalt-based solid-solution matrix ine yakaomesesa kugovera kweakaoma carbide zvimedu. Ichi chimiro chinoita zvakanaka pasi pekupfeka kweabrasive.
Pazvinokodzera. Zviso zvekuvharisa mavharuvhu, maoko epombi, slurry kubata zvinhu, uye zvikamu zvekupfeka zvakajairwa zviri pakati nepakati zvinowanzoitika Stellite 6 application. Kuomarara kwayo kunowanzo kuwira muRockwell C 37-45 renji, zvichienderana nekukanda mamiriro uye kunotevera kupisa kurapwa, izvo zvinokwana kune akawanda abrasive matambudziko ekupfeka. Mune oxidizing yakakwirira-tembiricha nharaunda, Stellite 6 zvakare inoumba inodzivirira oxide layer yakavakirwa zvakanyanya paCr₂O₃ uye CoCr₂O₄, ine yakaderera oxidation mwero kupfuura Stellite 21.
Apo miganhu inoratidza. Iyo carbide density ine padivi pemhedzisiro: pasi pekukurumidza kupisa bhasikoro kana kunzvimbo inopisa kupisa, iwo mutsauko wekuwedzera wekupisa pakati pecarbides uye matrix inogona kuve nzvimbo yekutanga kutsemuka. Kune dzakatetepa-chikamu zvikamu, iyo yakakwira kabhoni uye carbide zvirimo zvinogona zvakare kusimudza njodzi yekutsemuka panguva yekukanda uye machining. Izvi hazvireve kuti Stellite 6 haigone kushandiswa mumamiriro ezvinhu aya, asi kana kuneta kwekupisa kuri iyo nzira yekutadza, imwe nzira inofanirwa kuongororwa zvakanyanya.
Stellite 21: yakaderera carbide yemukati mukutsinhana kuomarara uye nekupisa kuneta kuramba
Stellite 21 inotevera dhizaini yakasiyana. Yayo yakaderera kabhoni yemukati uye molybdenum yekuwedzera inoderedza zvakanyanya carbide vhoriyamu chikamu, ichisiya iyo cobalt solid-solution matrix sechikamu chinotakura kuita kwemuchina.
Mhedzisiro yakananga: Kuomarara kwekamuri-tembiricha uye kwakachena abrasive kupfeka kuramba zvakaderera pane Stellite 6, asi kuomarara, kupisa kutyisa kuramba, uye kupisa kuneta kuramba zviri nani. As-cast kuomarara kunowanzo kutaurwa mune yakaderera-kusvika-pakati HRC 30s, pazasi iyo yeStellite 6 (chaiyo tsika dzinotsamira pane chigadzirwa chimiro uye bvunzo mamiriro - simbisa uchipikisa data remupi usati wataura). Kubatsira kwayo hakusi kunze-kupfeka mabrasives asi kuchengetedza kutendeseka kwechimiro pasi pekupisa bhasikoro.
Pazvinokodzera. Stellite 21 yakashandiswa mune gasi turbine blades, kupisa-kushanda mavharuvhu, yakakwirira-tembiricha fasteners, uye weld overlays inoda kuvharira kupisa kwekuwedzera kusawirirana. Iko Stellite 6 inoshanda seyepamusoro layer uye yepakati inodiwa, Stellite 21 yagara ichishandiswa sebuffer kupfavisa mutsauko wekuwedzera wekupisa pakati pesimbi substrate neStellite 6 yepamusoro layer. Chidzidzo paF91 simbi substrates ine Stellite 21 buffer layers, ine makore 550–650°C kwemaawa anosvika 8,760, yakawana yakakosha kurasikirwa kwekuomarara paF91/S21 interface, ndosaka nickel-based buffer layers ari kuwedzera kufarirwa mune iyoyo chaiyo application. Izvi zvinoratidzira nzvimbo yealloy zvakanaka: kukosha kwayo kuri mukuomarara pasi pemamiriro chaiwo, kwete kutsiva Stellite 6 kwese.
Kuganhurirwa kuri nyore kufuratirwa. Stellite 21 ine kushomeka kushoma kune yakaoma-chete kukukurwa. Nekuti carbide density yakadzikira, iyo matrix inopa kudzivirirwa kushoma kana zvimedu zvakapinza zvinorova nekumhanya. Pasi pekukurwa kwakadzika-kona uye yakaoma abrasive kupfeka, Stellite 21 kazhinji haisi iyo yakanakisa sarudzo.
Nzira yekusarudza inoshanda
Iyo inotevera nzira yakavakirwa pamaitiro ekuita kweaya maviri alloys. Inogona kushanda segwaro rekutanga rekuongorora asi haifanire kutsiva ongororo yeinjiniya yeiyo chaiyo application.
Sendamira kuStellite 6 apo:
- Iyo yakanyanya kutadza modhi ndeye abrasive kana anonamira kupfeka, uye kupisa bhasikoro hausi mutoro wakakura.
- Chikamu chine chikamu chakakora, uye kutsemuka senitivity panguva yekukanda uye machining inogoneka.
- Tembiricha yebasa yakakwira mumhepo ine oxidizing, uye inodzivirira oxide layer chikamu chedhizaini.
- Iyo application ine yakasimbiswa Stellite 6 nhoroondo ine kutadza data kunongedzera.
Sendamira kuStellite 21 apo:
- Chikamu chinodzokororwa nekukurumidza kupisa uye kutonhora, uye kupisa kuneta kupaza injodzi inozivikanwa.
- Chikamu chine madziro akatetepa kana akangoerekana achinja chikamu, uye kuomarara kunokosha kupfuura kuomarara.
- Shanduko dhizaini inodiwa pakati pesimbi substrate uye yakaoma yakatarisana kuti ivhare kupisa kwekuwedzera kusapindirana (asi kwenguva refu kugadzikana kwepamusoro-tembiricha kunofanirwa kuongororwa).
- Iyo yekupfeka michina inonyanya simbi-kune-simbi inotsvedza kupfeka kana cavitation pane kuoma-chete kukukurwa.
Kana pasina kukwana kwakachena: Kana iyo application ichida zvese zvakakwirira abrasive kupfeka kuramba uye yakanakisa yekupisa kuneta kuramba, Stellite 12 (yakakwirira kabhoni, yakakwirira kupfeka kuramba) kana iyo Tribaloy mhuri ye intermetallic-yakasimbiswa alloys ingave yakakosha kutariswa, kana iyo chikamu chekudziya kwekutonga kungangoda kugadziriswa padanho rekugadzira. Aya mafambiro anodarika kuenzanisa uku asi ndeekutanga-danho rekutanga sarudzo yekuongorora.
Chii chekuisa muRFQ
Chero ipi zvayo alloy inosarudzwa, mutengesi wekukanda uye machining kazhinji anoda zvinotevera isati yagona kupa quote ine musoro:
- Chikamu mifananidzo nehukuru hunokosha uye zvinodikanwa zvekushivirira.
- Mamiriro ebasa: tembiricha yemhando, yepakati, uye mutoro mhando (kupfeka, kukanganisa, kupisa bhasikoro).
- Hupenyu hunotarisirwa kana kuzivikanwa kutadza maitiro, nechikamu chenhoroondo kana chiripo.
- Muyero wezvinhu, semuenzaniso kana AMS 5387 kana imwe dhizaini inoshanda inofanirwa kusangana.
- Quantity, sezvo zvidimbu zvimwechete, mabheti madiki, uye mavhoriyamu ekugadzira zvinotungamira kune akasiyana maitiro sarudzo.
Kune cobalt-based alloy castings, zvakakoshawo kusimbisa kana mutengesi ane-mumba kugona kubva mukukanda kuburikidza nekupedzisa machining, nekuti aya alloys anoshanda-akasimba zvinoonekwa uye handoff pakati pemaitiro inokanganisa zvese mutengo uye nguva yekutungamira.
