I-Metal powder atomization inqubo ehambayo

Indlela yokulungisa impushana ngokujikijela noma ukuhlephula uketshezi lwensimbi noma lwengxubevange lube amaconsi amancane ngoketshezi oluhamba ngokushesha (i-atomizing medium) bese lujiya lube yimpushana eqinile. I-Atomization iyindlela engcono kakhulu yokukhiqiza impushana ehlanganisiwe ngokugcwele, ebizwa ngokuthi i-pre-alloyed powder. I-particle ngayinye ye-powder ayinayo kuphela ukwakheka kwamakhemikhali afanayo njengaleyo ye-alloy encibilikisiwe enikeziwe, kodwa futhi icwenga isakhiwo se-crystalline ngenxa yokuqiniswa okusheshayo, futhi iqeda ukuhlukaniswa okukhulu kwesigaba sesibili.

Indlela ye-atomization ingahlukaniswa ngezinhlobo ezimbili: "indlela yokugeleza okubili"(ukugeleza kwe-alloy liquid ngokuchoboza nge-atomizing ukugeleza okuphakathi) kanye "Indlela yokugeleza okukodwa"(ukugeleza kwe-alloy liquid ngezinye izindlela) . I-846 yokuqala ihlukaniswe yaba igesi (i-helium, inkungu, i-nitrogen, umoya) kanye noketshezi (amanzi, uwoyela) i-atomization medium, yokugcina efana ne-centrifugal atomization kanye ne-atomization yegesi encibilikisiwe.

Izindlela ezisetshenziswa kakhulu yi-gas atomization kanye ne-atomization yamanzi. Enqubweni ye-atomization, insimbi eluhlaza iyancibilika ibe uketshezi lwe-alloy olufanelekile (olushiswe ngokweqile ngo-100 ~ 150 ° C) esithandweni somlilo sikagesi noma sokungeniswa, bese sijovwa ku-tundish etholakala ngenhla komlomo we-atomization. Uketshezi oluyingxubevange lugeleza luphuma emgodini ongezansi we-Tundish, futhi lwenziwa i-athomu lube amaconsi amancane lapho luhlangana nomoya onesivinini esikhulu noma ukugeleza kwamanzi ngombhobho. Ngokuvamile, izinhlayiya ze-inert ze-athomu ye-athomu yegesi ziyindilinga ezinokuqukethwe kwe-oxygen ephansi kakhulu (ngaphansi kwe-L00 × 10) futhi zingenziwa zibe imikhiqizo eminyene ngokuqondile ngamasu we-thermoforming njengokucindezela okushisayo kwe-isostatic. Iningi lezinhlayiya zempuphu ye-athomu yamanzi zinesimo esingavamile, okuqukethwe kwe-oksijini ephezulu (ngaphezu kuka-600 × 10) futhi zidinga ukukhishwa, kodwa zinokucindezelwa okuhle futhi zingakhiwa ngokucindezela okubandayo bese zifakwa ezingxenyeni zemishini.

Indlela eshiwo ngenhla ye-atomization ilula ukuthi ibe yizimboni ngobuningi obukhulu, kodwa ngenxa yokuthi uketshezi lwe-alloy luthintana ne-slag ne-Refractory crucible, akunakugwenywa ukuthi ukufakwa okungezona okwensimbi kungeniswa ku-powder ophumela. Ngakho-ke, ngokuvumelana nesimiso se-ESR, i-Soderfors Powder Company yaseSweden yaqala yashintsha i-Tundish enamandla angu-7 T ibe idivayisi ye-ESR (electroslag heat), okuqukethwe kwe-non-metallic inclusions ku-powder yensimbi enesivinini esikhulu nge-atomization ye-nitrogen kwancishiswa ku-1/10 yokuqukethwe kwasekuqaleni, futhi amandla okugoba e-ASP powder kuya ku-3500MP yensimbi ephakeme kakhulu ye-35000MP akhushulwa esuka ku-3500MP yensimbi.

Isilinganiso sokugwema ukungcoliswa kwe-oxide ngokuphelele nangempumelelo ukusebenzisa indlela ye-atomization “yokugeleza okukodwa”, isibonelo, indlela ye-atomization ye-electrode ejikelezayo (bona indlela ye-electrode ejikelezayo) . Ngaphezu kwalokho, kukhona isixazululo vacuum atomization indlela kungase futhi ukukhiqiza okusezingeni eliphezulu-ukuhlanzeka eyindilinga powder. Isimiso siwukuthi: lapho igesi supersaturated ingxubevange liquid ngaphansi ingcindezi ngokuzumayo evezwa vacuum, igesi ziyoncibilika liyobaleka futhi ukunwetshwa, okubangela ingxubevange atomization uketshezi, bese ujikijelwa ibe powder. Nge-nickel, ithusi, i-cobalt, insimbi ne-aluminium matrix alloys, indlela yokuncibilikisa i-hydrogen ingasetshenziswa ukufeza i-vacuum encibilikisiwe yegesi atomization powder.