Metal powder atomization inkqubo ehambayo

Indlela yokulungisa umgubo ngokufaka okanye ngokuqhekeza isinyithi okanye ulwelo lwealloyi ukuya kumathontsi amancinane ngolwelo oluhamba ngokukhawuleza (i-atomizing medium) kwaye emva koko lujike lube ngumgubo oqinileyo. I-Atomization yeyona ndlela ilungileyo yokuvelisa umgubo oxutywe ngokupheleleyo, obizwa ngokuba ngumgubo owenziwe ngaphambili. Iqhekeza ngalinye lepowder alinayo nje into efanayo yokwakheka kweekhemikhali njengaleyo ye-alloy etyhidiweyo etyhidiweyo, kodwa iphinda ihlambulule isakhiwo se-crystalline ngenxa yokuqina ngokukhawuleza, kunye nokuphelisa ukuhlukana okukhulu kwesigaba sesibini.

Indlela ye-atomization inokwahlulwa ibe ziindidi ezimbini: "indlela yokuqukuqela-mbini"(i-alloy flow flowing by atomizing medium medium) kunye ne "Single-flow method"(indlela yokutyumza ulwelo lwealloyi ngezinye iindlela) . I-846 yokuqala yahlulwe yaba yigesi (i-helium, inkungu, i-nitrogen, umoya) kunye nolwelo (amanzi, i-oyile) i-atomization medium, le yokugqibela efana ne-centrifugal atomization kunye ne-gas vacuum atomization enyibilikileyo.

Iindlela ezisetyenziswa kakhulu yi-gas atomization kunye ne-atomization yamanzi. Kwinkqubo ye-atomization, isinyithi ekrwada siyanyibilika kwi-alloy liquid (eshushu kakhulu nge-100 ~ 150 ° C) kwisithando sombane okanye sokufakelwa, kwaye emva koko sifakwe kwi-tundish ebekwe phezu kwe-nozzle ye-atomization. Ulwelo lwe-alloy luphuma kumngxuma ongezantsi weTundish, kwaye lufakwe kwi-atomized ibe ngamathontsi amancinci xa idibana nomoya ohamba ngesantya esiphezulu okanye amanzi ahamba ngombhobho. Ngokubanzi, i-inert gas atomized powder particles are round in shape with the low oxygen content (ngaphantsi kwe-L00 × 10) kwaye inokwenziwa kwiimveliso ezixinzelelekileyo ngokuthe ngqo ngeendlela ze-thermoforming ezifana nokucinezela kwe-isostatic eshushu. Uninzi lwamanzi e-atomized powder particles anemilo engaqhelekanga, umxholo ophezulu we-oksijeni (ngaphezu kwe-600 × 10) kwaye kufuneka ifakwe i-annealed, kodwa i-compressibility efanelekileyo kwaye inokubunjwa ngokucinezela okubandayo kwaye emva koko ifakwe kwiindawo zomatshini.

Indlela echazwe ngasentla ye-atomization ilula ukuveliswa kwimizi-mveliso kubuninzi obukhulu, kodwa ngenxa yokuba i-alloy liquid idibene ne-slag kunye ne-Refractory crucible, akunakugwenywa ukuba ukubandakanywa okungenayo i-metallic kungeniswa kwi-powder ephumela. Ngoko ke, ngokomgaqo we-ESR, iNkampani ye-Soderfors Powder yaseSweden yaqala yatshintsha iTundish enomthamo we-7 T kwi-ESR (i-electroslag yokufudumeza) isixhobo, umxholo wezinto ezifakwe kwi-non-metallic inclusions kwi-powder high speed steel nge-nitrogen atomization yancitshiswa yaba yi-1/10 yomxholo wokuqala, kwaye amandla okugoba kwe-ASP powder kwi-powder30000000MP ye-ASP ephezulu kwi-speed MP3000 yanda ukusuka kwi-speed ye-3500MP.

Umlinganiselo wokuphepha ukungcoliswa kwe-oxide ngokupheleleyo kwaye ngokufanelekileyo kukwamkela "i-Single-flow" indlela ye-atomization, umzekelo, indlela ye-atomization ye-electrode ejikelezayo (jonga indlela ye-electrode ejikelezayo). Ukongeza, kukho isisombululo se-vacuum indlela ye-atomization inokuvelisa umgubo ophezulu we-spherical powder. Umgaqo ngulo: xa irhasi supersaturated ingxubevange ulwelo phantsi koxinzelelo ngesiquphe evezwe vacuum, irhasi enyibilikisiweyo uya kubaleka kunye nokwandiswa, okubangela atomization ulwelo ingxubevange, kwaye emva koko ijikwe ibe ngumgubo. Kwi-nickel, ubhedu, i-cobalt, isinyithi kunye ne-aluminium matrix alloys, indlela yokuchithwa kwe-hydrogen ingasetyenziselwa ukufezekisa i-vacuum enyibilikisiweyo ye-atomization powder.