Ⅰ.Overview
Mumagetsi ekupisa, petrochemical systems, high-viscosity fluid muindasitiri yemakemikari emarasha, mvura yakasanganiswa neguruva uye zvimedu zvakasimba, uye mvura inoparadza zvakanyanya, mavharuvhu ebhora anoda kushandisa simbi yakaoma-yakavharwa bhora mavharuvhu, saka sarudza yakakodzera simbi yakaoma-yakavharwa. bhora mavharuvhu.Kuomeswa kwebhora uye chigaro chevhavha yebhora yakakosha zvikuru.
Ⅱ.Kuomesa nzira yebhora uye chigaro chesimbi yakaoma-yakavharwa bhora valve
Parizvino, iyo inowanzoshandiswa kuomesa maitiro epamusoro pesimbi yakaoma sealing bhora valve mabhora anonyanya kusanganisira anotevera:
(1) Yakaomeswa alloy yakatarisana (kana kupfapfaidza welding) pamusoro penzvimbo, kuomarara kunogona kusvika kupfuura 40HRC, iyo yekutarisana neyakaomeswa alloy pane sphere nzvimbo yakaoma, kugona kwekugadzira kwakadzikira, uye nzvimbo hombe. pamusoro welding zviri nyore kukanganisa zvikamu.Iyo nzira yekuomesa kesi inoshandiswa zvishoma kazhinji.
(2) Kumusoro kwepasi kwakaputirwa nehard chrome, kuoma kunogona kusvika 60-65HRC, uye ukobvu i0.07-0.10mm.Iyo chrome-plated layer ine kuomarara kwakanyanya, kupfeka kusagadzikana, kusaita ngura uye inogona kuchengetedza nzvimbo yakapenya kwenguva yakareba.Maitiro acho ari nyore uye mutengo wakaderera.Nekudaro, kuoma kweiyo hard chrome plating kuchadzikira nekukurumidza nekuda kwekuburitswa kwekushushikana kwemukati kana tembiricha yawedzera, uye tembiricha yayo yekushanda haigone kukwira kupfuura 427 ° C.Mukuwedzera, simba rekubatanidza re chrome plating layer yakaderera, uye plating layer inowira pasi.
(3) Pamusoro pe sphere inotora plasma nitriding, kuoma kwepamusoro kunogona kusvika 60 ~ 65HRC, uye hupamhi hwe nitride layer i 0.20 ~ 0.40mm.Nekuda kwekusagadzikana kwehurosi kuramba kweplasma nitriding kurapwa kuomesa maitiro, haigone kushandiswa muminda yemakemikari akasimba ekuora.
(4) Iyo supersonic spraying (HVOF) maitiro pamusoro penzvimbo ine kuoma kwekusvika 70-75HRC, yakakwirira aggregate simba, uye ukobvu hwe0.3-0.4mm.HVOF kupfapfaidza ndiyo nzira huru yekuomesa pamusoro penzvimbo.Iyi nzira yekuomesa inonyanya kushandiswa mumagetsi ekupisa, petrochemical systems, high-viscosity fluid muindasitiri yemakemikari emarasha, mvura yakasanganiswa neguruva uye zvimedu zvakasimba, uye mvura inoparadza zvikuru.
Iyo supersonic yekupfapfaidza nzira inzira yekupisa iyo mafuta eokisijeni inoburitsa mhepo inomhanya-mhanya kumhanyisa zvidimbu zvehupfu kuti zvirove pamusoro pechikamu kuita dense pamusoro pekuputira.Munguva yekukanganisa maitiro, nekuda kwekukurumidza particle velocity (500-750m / s) uye yakadzika particle tembiricha (-3000 ° C), yakakwirira yekubatanidza simba, yakaderera porosity uye yakaderera oxide yemukati inogona kuwanikwa mushure mekurova pamusoro pechikamu. .coating.Hunhu hweHVOF ndehwekuti kumhanya kwealloy powder particles kunopfuura kumhanya kweruzha, kunyangwe 2 kusvika ku3 nguva yekumhanya kweruzha, uye mhepo yemhepo inokwana 4 iyo yekumhanya kwenzwi.
HVOF inyowani yekugadzira tekinoroji, ukobvu hwekupfapfaidza i0.3-0.4mm, iyo yekupfekedza uye chikamu chacho zvakasungwa nemagetsi, simba rekubatanidza rakakwira (77MPa), uye coating porosity yakaderera (<1%).Iyi nzira ine tembiricha yekudziya yakaderera yezvikamu (<93°C), zvikamu zvacho hazvina kuremara, uye zvinogona kupfapfaidzwa nechando.Paunenge uchipfapfaidza, iyo poda particle velocity yakakwirira (1370m / s), hapana nzvimbo inopisa-inopisa, kuumbwa uye chimiro chezvikamu hazvichinje, kuomarara kwekuputira kwakakwira, uye inogona kugadzirwa.
Kupfapfaidza welding inzira yekupisa yekupfapfaidza yekurapa pamusoro pezvinhu zvesimbi.Inopisa hupfu (metal powder, alloy powder, ceramic powder) kune yakanyunguduka kana yakakwirira plastiki state kuburikidza nemhepo inopisa, uye yobva yamwaya nekuyerera kwemhepo nekuiisa pamusoro pechikamu chakagara chagadzirwa kuti chiite danda ne. pamusoro pechikamu.(Substrate) yakasanganiswa nesimbi yakasimba (welding) layer.
Mumushonga wekupfapfaidza welding uye nepamusoro pekuomesa maitiro, ese ane simende carbide uye substrate ine kunyunguduka, uye kune inopisa kunyunguduka zone uko simende carbide uye substrate zvinosangana.Nzvimbo yacho inzvimbo yesimbi.Zvinokurudzirwa kuti ukobvu hwesimende carbide hunofanira kudarika 3mm nespray welding kana pamusoro.
Ⅲ. Kuoma kwenzvimbo yekubatana pakati pebhora uye chigaro chevhavha yakaoma-yakavharwa bhora
Iyo simbi inotsvedza yekubata kumeso inoda kuve neyakaomarara musiyano, zvikasadaro zviri nyore kukonzera kubatwa.Mukushandiswa kunoshanda, musiyano wekuoma pakati pebhora revharuvhu uye chigaro chevharuvhu kazhinji 5-10HRC, iyo inogonesa vharafu yebhora kuve nehupenyu hwesevhisi huri nani.Nekuda kwekugadzirisa kwakaoma kwenzvimbo uye mutengo wepamusoro wekugadzirisa, kuitira kuchengetedza sphere kubva mukukuvadzwa nekupfeka, kuoma kwenzvimbo kunowanzo kukwirira kupfuura kuoma kwechigaro chevhavha.
Kune marudzi maviri ekuomarara masanganiswa ayo anoshandiswa zvakanyanya pakubata kumeso kuoma kwebhora revharuvhu uye chigaro chevharuvhu: ①Kuoma kwepamusoro kwebhora revharuvhu i55HRC, uye pamusoro pechigaro chevharuvhu i45HRC.Alloy, iyi yakaoma mechi ndiyo inonyanya kushandiswa kuomarara mechi yesimbi-yakavharwa bhora mavharuvhu, ayo anogona kuzadzisa zvakajairwa kupfeka zvinodiwa zvesimbi-yakavharwa bhora mavharuvhu;②Kuoma kwepamusoro kwebhora revharuvhu ndeye 68HRC, pamusoro pechigaro chevharuvhu i58HRC, uye pamusoro pebhora revharuvhu rinogona kusaswa ne supersonic tungsten carbide.Pamusoro pechigaro chevharuvhu chinogona kugadzirwa neStellite20 alloy nekupfapfaidza supersonic.Kuomarara uku kunoshandiswa zvakanyanya muindasitiri yemakemikari emarasha uye ine yakakwirira kupfeka kuramba uye hupenyu hwebasa.
Ⅳ.Epilogue
Bhora revhavha uye chigaro chevhavha yesimbi yakaoma-yakavharwa bhora rinotora nzira inonzwisisika yekuomesera, iyo inogona kunyatsoona hupenyu hwebasa uye kushanda kwesimbi yakaoma-chisimbiso chevhavha, uye nzira inonzwisisika yekuomesa inogona kuderedza mari yekugadzira.
Nguva yekutumira: Oct-26-2022