Stellite alloy ishoko rakajairwa kune akatevedzana ecobalt-chromium alloys ayo anopesana nekupisa kwakanyanya, kupfeka uye ngura. "Stellite" pakutanga yaive patent yeDeloro Group. Muna 2012, iyo Deloro Stellite Boka yakawanikwa neKennametal uye ikava chiratidzo chakanyoreswa cheKennametal, chaishandiswa kureva mamwe macobalt-based alloys.
Kuumbwa kwemakemikari eStellite alloy:
Stellite alloy ndeyemhuri yecobalt-based alloy uye kunyanya ine zvinotevera zvakakosha zvinhu:
Cobalt (Co) : Chinhu che matrix, chinoverengera chingangoita 50-65% yehuremu hwakazara, ichipa yakanakisa-yepamusoro-tembiricha simba uye nekupisa kuneta kuramba.
Chromium (Cr) : Zvirimo zviri pakati pe25% ne33%, uye ndiyo kiyi yekugadzira dense yekudzivirira yechromium oxide (Cr₂O₃), ichipa iyo alloy nekupokana kwakanyanya kune yakanyanya-tembiricha oxidation uye ngura.
Tungsten (W) uye molybdenum (Mo): Iyo huru yakasimba mhinduro inosimbisa zvinhu. Imwe tungsten kana molybdenum inosanganiswa nekabhoni kuti igadzire yakaoma carbides, ichiwedzera zvakanyanya kuoma kwakatsvuka uye kupfeka kuramba kwealloy.
Carbon (C) : Zviri mukati zvinoshanduka pakati pe0.1% ne3.0%. Carbon ndicho chinhu chepakati mukugadzirwa kwecarbides (senge MC, M₂₃C₆, M₇C₃), iyo yakanyudzwa mucobalt matrix sesimbi simbi, ichigadzira "skeleton" kuti alloy irambe kupfeka.
Kusimbiswa kweStellite alloy kunonyanya kunobva kune austenite matrix yakasimbiswa nemhinduro yakasimba uye carbides yakagoverwa mumatrix. Iyi yakasarudzika yekusimbisa masisitimu inogonesa Stellite alloy kuona kuderera kwakanyanya musimba sezvo tembiricha inokwira, ichipa iyo yakanyanya kugadzikana yekupisa kwekushisa.
Iwo makuru mamakisi uye maitiro eStellite alloy:
Pfekai-resistant series
Stellite 1: Yepamusoro-kabhoni uye yakakwirira-tungsten giredhi ine kuoma kwekusvika HRC 48-55. Iyo ine yakanakisa anti-abrasive kupfeka kuita uye inokodzera zvigaro zvevharuvhu, mabhengi uye kupfeka-resistant liners, nezvimwe.
Stellite 4: Simba rakakwirira, kuoma kwakanyanya. Inokodzera kutonhora kutsika inofa, yakakwirira-kushushikana kupfeka zvikamu, nezvimwe.
Stellite 6: Iyo yakanyanya kuchinjika uye yakasarudzika giredhi, inozivikanwa se "Jack yemarudzi ese". Iyo ine chiyero chakakwana chekuomarara (inenge HRC 40) uye kuomarara, uye zvakare inoratidzira yakanakisa kukanganisa kupikisa, kusaita ngura uye yakanyanya-tembiricha kuramba. Inoshandiswa zvakanyanya mumavharuvhu ekuvhara mavharuvhu, injini mavharuvhu uye akasiyana bushings, nezvimwe.
Stellite 12: Basa rayo riri pakati peiyo yeStellite 1 neStellite 6, ine kuoma kweinenge HRC 45. Yakaoma uye yakawanda-isingasviki kupfuura Stellite 6, uye inokodzera kutonhora kwepamusoro uye kudzvinyirira kwepamusoro-soro, sawteeth, screw push rods, uye mavharuvhu ekudzora.
Stellite 20: Giredhi rine kuomarara kwakanyanya (ingangoita HRC 60), rakanyanya kugadzirirwa mapfekero akanyanya abrasive, uye rinowanzo shandiswa mukutakura maoko, mahwendefa asingapfeki, uye mhete dzekuvharisa.
Stellite 100: Impact-resistant uye cavitation resistant, inonyanya kugadzirirwa kunyanyisa abrasive kupfeka mamiriro, inowanzoshandiswa mumapombi impellers, turbine blades, uye makemikari michina.
High-temperature/corrosion-resistant series
Stellite 21: Iyo yakaderera-kabhoni, molybdenum-ine giredhi ine yakanakisa kusimba uye yakasarudzika yekushisa kuvhunduka kuramba. Gasi turbine blades, yakakwirira-tembiricha mavharuvhu, yenyukireya indasitiri zvikamu.
Stellite 31 (X-40) : Iine nickel, inoratidzira yakanakisa-yepamusoro-tembiricha simba uye kupisa kuneta kuramba, uye yakagara ichishandiswa sechinhu chekutungamira vanes muinjini dzeaero uye zvikamu zvema turbines egasi.
Stellite 25: Yakaderera kabhoni yemukati, ine yakanakisa kuramba kuneta kuneta, oxidation uye sulfidation, inokodzera zvikamu zvekamuri yekupisa.
Special Performance Series
Tribaloy T-400: Yakakwira molybdenum yemukati, yakanakisa yepamusoro-tembiricha yega-yekuzora pfuma, kuwana yakakwirira-tembiricha yega-kuzora kuburikidza neLaves phase, kunyanya yakakodzera kune gedhi mavharuvhu uye isina mafuta-isina lubrication zvikamu mune yakakwirira-tembiricha uye inoparadza zvakanyanya media.
Tribaloy T-800: Yakakwira molybdenum uye yakakwira chromium, ine zvirinani kupfeka kuramba kupfuura T-400, yakakodzera kune zvakanyanya kudiwa, corrosive uye yakakwirira-tembiricha nharaunda.
Zvakanakira uye kuipa kweStellite alloy
Zvakanakira
Kuomarara kwakatsvuka kwakatanhamara: Chinhu chakanyanya kuzivikanwa cheStellite alloy ndechekuti inogona kuchengetedza kuoma kwakanyanya uye simba kunyangwe pakupisa kwakanyanya kubva pa650 kusvika 1000 ℃. Macarbides ayo haanyungudike zvakare kusvika pakakwirira kusvika 1100 ℃, izvo zvakaoma kune akawanda iron-based uye nickel-based zvinhu kuti zviwane.
Comprehensive corrosion resistance: Iyo yakakwira chromium yemukati inoita kuti iite yakagadzikana passivation firimu mune akasiyana corrosion media, kusanganisira mvura yegungwa, sulfuric acid, nitric acid uye yakanyanya-tembiricha gasi, ichiratidza kuramba kwakanakisa kune ese ari maviri yunifomu uye emunharaunda ngura. Kunyanya maererano nekupikisa kupisa kwekupisa (senge sulfidation), maStellite alloys anowanzo kurira kune nickel-based alloys nekuda kwekunyungudika kwepamusoro kwecobalt sulfides.
Kunyanya kupfeka kuramba: Kungave kuri kukweshera kwemukati memetallic (kunamira kupfeka) kana kupfeka kwekukurwa kunokonzerwa nemvura ine zvimedu, Stellite alloy inoita zvakanaka. Iyo ine yakaderera coefficient ye friction uye yakasimba anti-scratch kugona.
Yakanakisa yekupisa kuneta kuramba: Inogona kumira zvakanyanya kushanduka kwekushisa (kuvhunduka kwekushisa) pasina kutsemuka, ichiita kuti ive yakakodzera kwazvo kugara-kumisa mamiriro emavharuvhu, mold, nezvimwe.
Kukanganisa
Kusakwana kwepakati-tembiricha simba: Pakupisa kwepakati (senge 600-800 ℃), simba reStellite alloys rinowanzongoita 50-75% yeiyo nickel-based alloys nekuda kwekushaikwa kwezvikamu zvekusimbisa.
Kuoma kwepamusoro-soro: Nekuda kwekuoma kwayo kwakanyanya uye kuomarara kwakanyanya, kuchekwa kweStellite alloy kwakaoma zvakanyanya. Kazhinji, nzira dzekugaya chete kana dzakakosha dzekugadzirisa dzinogona kutorwa, zvichikonzera kudhura kwekugadzira kwezvikamu.
Kushomeka kwezvekushandisa: Cobalt yakakosha hurongwa hwekushandisa. Nzvimbo dzayo dzepasi rose dzakaganhurirwa uye dzisina kugovaniswa, izvo zvinotungamira kumutengo wepamusoro weStellite alloy. Kusvika kumwero wakati, izvi zvinoganhurira kushandiswa kwayo kukuru-mwero.
Yakaganhurirwa oxidation kuramba: Pasinei nekupokana kwayo kwekupisa kwekupisa, iyo oxidation kuramba kweStellite alloys munzvimbo dzakachena dzepamusoro-tembiricha oxidation inowanzodzika pane iyo nickel-based alloys.
