Plasma yekucheka michinakazhinji vane yakakwirira isina-mutoro voltage uye kushanda kwemagetsi, uye kuwedzera kwemagetsi kunoreva kuwedzera kwearc enthalpy.Paunenge uchiwedzera iyo enthalpy, kuderedza jet dhayamita uye kuwedzera kuyerera kwegasi kunogona kuvandudza kukurumidza kucheka uye kutema kunaka.Mavhiri epamusoro anodiwa kana uchishandisa magasi ane simba reionization rakawanda, senge nitrogen, hydrogen kana mhepo.Ndeapi akasiyana matipi ekusarudza gasi uye mapoinzi?Ngatitarisei kuongororwa kwakadzama kwegasi nenyanzvi dzekucheka plasma vanogadzira muchina.
Hydrogen inowanzo shandiswa segasi rinobatsira rakasanganiswa nemamwe magasi, uye gasi H35 nderimwe remagasi ane simba rakasimba rekucheka plasma arc.Kana hydrogen yakasanganiswa neargon, chikamu chehaidhirojeni chinowanzoita 35%.Sezvo hydrogen inogona kuwedzera zvakanyanya arc voltage, iyo hydrogen plasma jet ine yakakwirira enthalpy, uye kukwanisa kucheka kwejeti yeplasma kunovandudzwa zvikuru.
Okisijeni inogona kuwedzera kumhanya kwekucheka zvinyoro zvesimbi.Kana uchicheka neokisijeni, nzira yekucheka yakafanana chaizvo neye CNC yekucheka moto muchina.Iyo yakakwirira-yekushisa uye yakakwirira-simba re plasma arc inoita kuti kuchekwa kukurumidze, asi inofanira kushandiswa pamwe chete nepamusoro-kupisa oxidation-resistant electrodes.Wedzera hupenyu hwemagetsi.
Iyo slag inoumbwa nekucheka kwemhepo uye nitrogen yekucheka yakafanana, nekuti vhoriyamu yenitrogen mumhepo inenge 78%, uye kune inenge 21% okisijeni mumhepo, saka kumhanya kwekucheka low kabhoni simbi nemhepo zvakare kwakanyanya. yakakwirira, uye Mhepo ndiyo yakanyanya hupfumi inoshanda gasi, asi kucheka nemhepo chete kunokonzeresa matambudziko akadai se slag kuturika, kerf oxidation, uye nitrogen kuwedzera.Hupenyu hwakaderera hwema electrode uye nozzles huchakanganisawo kushanda zvakanaka uye mutengo wekucheka.
Pasi pemamiriro emagetsi ekupa magetsi, iyo nitrogen plasma arc ine kugadzikana kuri nani uye yakakwirira jet simba pane argon.Semuenzaniso, kana uchicheka simbi isina tsvina uye nickel-based alloys, pane zvishoma slag pamucheto wezasi, uye nitrogen inogona kushandiswa yoga.Inogonawo kusanganiswa nemamwe magasi.Nitrogen kana mhepo inowanzoshandiswa segasi rinoshanda mukucheka otomatiki, uye magasi maviri aya akave gasi rakajairwa rekucheka-kumhanya kwekabhoni simbi.
Kuita kwe argon kwakagadzikana, uye hakuiti nesimbi chero ipi zvayo kunyange pakupisa kwepamusoro, uye muromo uye electrode inoshandiswa zvine hupenyu hurefu hwebasa.Zvisinei, iyo voltage ye argon plasma arc yakaderera, iyo enthalpy haisi yakakwirira, uye simba rekucheka rinogumira.Kuenzaniswa nekucheka kwemhepo, kucheka kwekucheka kuchaderedzwa ne25%.Pamusoro pezvo, kushushikana kwepamusoro kwesimbi yakanyungudutswa kwakakwira, iyo inenge 30% yakakwirira kupfuura iyo iri mu nitrogen nharaunda, saka pachave nedambudziko rakawanda rekurembera slag.Kunyangwe kucheka negasi rakavhenganiswa remamwe magasi kunowanzo kunamatira kune slag.Naizvozvo, argon yakachena haiwanzo shandiswa yega pakucheka plasma.
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Nguva yekutumira: Chivabvu-09-2023