Ukwabelana ngenqubo ye-sintering ye- isithando somlilo se-vacuum sintering

1. Ukushiswa esiteji

Esokuqala yisiteji sokuncibilika noma i-ejenti esakhayo, esingaphinde sibizwe ngesiteji sangaphambi kwe-sintering. Kulesi sigaba, izinga lokushisa kufanele liphakanyiswe kancane. Izinga lokushisa lokubola lakho kokubili okokugcoba kanye ne-ejenti yokwakha lingaba ngu-300°C. Ngakho-ke, izinga lokushisa kufanele lihambe kancane ngangokunokwenzeka cishe ku-300 ° C futhi libe nesikhathi eside esanele sokususa okokugcoba. Isiteji sangaphambi kokushiswa sidinga ukugcinwa ezingeni lokushisa elithile isikhathi esithile, inhloso yaso ukukhipha ngokugcwele okokugcoba, nokwenza ukusabela kwaso kokunciphisa i-oxidation. Uma ikhabhoni iqukethwe engxenyeni ene-sintered, ukusabela kwe-carbon-oxygen kuzokwenzeka ngaphezu kuka-700°C. Isikhathi esidingekayo sesigaba sokushiswa sincike enanini le-lubricant engezwe engxenyeni kanye nobukhulu bengxenye. I-pre-sintering ngesigaba sangaphambi kwe-sintering kufanele ivumele i-lubricant noma i-ejenti yokwakha ukuthi ibole igesi nomoya-mpilo ukuze kuqedwe ngokuphelele. Ukuthi la magesi aqedwe ngokuphelele yini kungabonwa ngezinga le-vacuum. Uma izinga le-vacuum lizinzile ngenani elithile, kusho ukuthi lisusiwe.

2. Sintering esiteji

Izinga lokushisa elibekwe esigabeni se-sintering izinga lokushisa elidingekayo ukuze kufakwe i-sintering. Ngenxa yokuthi i-vacuum sintering inomthelela wokwenza kusebenze i-sintering, izinga lokushisa layo le-sintering liphansi ngo-50 kuya ku-100°C kunaleso se-atmosphere sintering. Uma i-liquid phase sintering yenziwa, izinga lokushisa le-sintering kufanele licaciswe ezingeni lokushisa elingaphezudlwana kwephuzu lokuncibilika lensimbi yesigaba soketshezi. I-Sintering phakathi kwezinhlayiya ze-powder kanye ne-alloying phakathi kwezakhi ze-alloying kuzokwenzeka kulesi sigaba. Ngesikhathi esifanayo, i-vacuum degree ephakeme ngokweqile akufanele isetshenziswe kulesi sigaba, ngoba ukuphakama kwe-vacuum degree, ukulahlekelwa okukhulu kwensimbi ewuketshezi. Ukuze kuncishiswe ukulahleka kwezinsimbi, amagesi athile afana ne-nitrogen, i-argon ne-hydrogen avame ukugcwaliswa e-sintering.

3. Isiteji sokupholisa

Ukupholisa kwe-vacuum sintering kufaka phakathi ukupholisa okuvala amandla okuqondile noma ukupholisa kwamanje kokunciphisa okuhamba kancane, okuncike ezindingweni zokupholisa. Njengoba ipholiswa ngesithando somlilo, izinga lokupholisa lihamba kancane kunele-atmosphere sintering. Ukugcwalisa ngegesi evikelayo kungakhuphula izinga lokupholisa.

1. Ukushiswa esiteji

Esokuqala yisiteji sokuncibilika noma i-ejenti esakhayo, esingaphinde sibizwe ngesiteji sangaphambi kwe-sintering. Kulesi sigaba, izinga lokushisa kufanele liphakanyiswe kancane. Izinga lokushisa lokubola lakho kokubili okokugcoba kanye ne-ejenti yokwakha lingaba ngu-300°C. Ngakho-ke, izinga lokushisa kufanele lihambe kancane ngangokunokwenzeka cishe ku-300 ° C futhi libe nesikhathi eside esanele sokususa okokugcoba. Isiteji sangaphambi kokushiswa sidinga ukugcinwa ezingeni lokushisa elithile isikhathi esithile, inhloso yaso ukukhipha ngokugcwele okokugcoba, nokwenza ukusabela kwaso kokunciphisa i-oxidation. Uma ikhabhoni iqukethwe engxenyeni ene-sintered, ukusabela kwe-carbon-oxygen kuzokwenzeka ngaphezu kuka-700°C. Isikhathi esidingekayo sesigaba sokushiswa sincike enanini le-lubricant engezwe engxenyeni kanye nobukhulu bengxenye. I-pre-sintering ngesigaba sangaphambi kwe-sintering kufanele ivumele i-lubricant noma i-ejenti yokwakha ukuthi ibole igesi nomoya-mpilo ukuze kuqedwe ngokuphelele. Ukuthi la magesi aqedwe ngokuphelele yini kungabonwa ngezinga le-vacuum. Uma izinga le-vacuum lizinzile ngenani elithile, kusho ukuthi lisusiwe.

2. Sintering esiteji

Izinga lokushisa elibekwe esigabeni se-sintering izinga lokushisa elidingekayo ukuze kufakwe i-sintering. Ngenxa yokuthi i-vacuum sintering inomthelela wokwenza kusebenze i-sintering, izinga lokushisa layo le-sintering liphansi ngo-50 kuya ku-100°C kunaleso se-atmosphere sintering. Uma i-liquid phase sintering yenziwa, izinga lokushisa le-sintering kufanele licaciswe ezingeni lokushisa elingaphezudlwana kwephuzu lokuncibilika lensimbi yesigaba soketshezi. I-Sintering phakathi kwezinhlayiya ze-powder kanye ne-alloying phakathi kwezakhi ze-alloying kuzokwenzeka kulesi sigaba. Ngesikhathi esifanayo, i-vacuum degree ephakeme ngokweqile akufanele isetshenziswe kulesi sigaba, ngoba ukuphakama kwe-vacuum degree, ukulahlekelwa okukhulu kwensimbi ewuketshezi. Ukuze kuncishiswe ukulahleka kwezinsimbi, amagesi athile afana ne-nitrogen, i-argon ne-hydrogen avame ukugcwaliswa e-sintering.

3. Isiteji sokupholisa

Ukupholisa kwe-vacuum sintering kufaka phakathi ukupholisa okuvala amandla okuqondile noma ukupholisa kwamanje kokunciphisa okuhamba kancane, okuncike ezindingweni zokupholisa. Njengoba ipholiswa ngesithando somlilo, izinga lokupholisa lihamba kancane kunele-atmosphere sintering. Ukugcwalisa ngegesi evikelayo kungakhuphula izinga lokupholisa.