Metal poda atomization inotungamira maitiro

Nzira yekugadzira poda nekupinza kana kutyora simbi kana alloy zvinwiwa kuita madonhwe madiki nemvura inofamba inokurumidza (atomizing medium) wobva waita kuti iite hupfu hwakasimba. Atomization ndiyo nzira yakanakisa yekugadzira yakazara alloyed powder, inonzi pre-alloyed powder. Chikamu chega chega chehupfu hachina kungoita yunifomu yekemikari yakagadzirwa seyakapiwa yakanyungudutswa alloy, asiwo inonatsa chimiro chekristalline nekuda kwekukurumidza kusimba, uye kubvisa macro-segregation yechikamu chechipiri.

Iyo atomization nzira inogona kukamurwa kuita marudzi maviri: iyo "Two-kuyerera nzira"(kupwanya alloy fluid kuyerera neatomizing yepakati kuyerera) uye "Single-flow nzira"(kupwanya alloy fluid kuyerera nedzimwe nzira) . 846 yekutanga yakakamurwa kuita gasi (helium, mhute, nitrogen, mhepo) uye mvura (mvura, mafuta) atomization yepakati, iyo yekupedzisira senge centrifugal atomization uye yakanyungudika gasi vacuum atomization.

Nzira dzinonyanya kushandiswa ndeye gasi atomization uye mvura atomization. Mukuita kweatomization, simbi yakasvibirira inonyungudutswa kuita alloy liquid (yakanyanya kupisa 100 ~ 150 ° C) muchoto chemagetsi kana induction, yozopinzwa mu tundish iri pamusoro peatomization nozzle. Iyo alloy fluid inoyerera ichibva pasi pegomba reTundish, uye inoiswa atomi kuita madonhwe madiki kana yasangana nemhepo inomhanya-mhanya kana mvura inoyerera nemumuromo. Kazhinji, inert gasi atomized poda zvimedu zvakatenderedzwa muchimiro neiyo yakaderera okisijeni yemukati (pazasi L00 × 10) uye inogona kugadzirwa mune densified zvigadzirwa zvakanangana ne thermoforming hunyanzvi senge inopisa isostatic kudzvanya. Mazhinji emvura atomized powder particles ane chimiro chisina kujairika, yakakwira okisijeni yemukati (pamusoro pe600 × 10) uye inoda kuvharwa, asi ine yakanaka compressibility uye inogona kuumbwa nekutsikirira kwechando uye yozopinzwa muzvikamu zvemakanika.

Iyo yakataurwa pamusoro apa atomization nzira iri nyore kuve maindasitiri muhuwandu hukuru, asi nekuti iyo alloy liquid inosangana ne slag uye Refractory crucible, hazvidzivisiki kuti non-metallic inclusions inounzwa muhupfu hunoguma. Nokudaro, maererano ne ESR musimboti, Soderfors Powder Company yeSweden yakatanga kushandura Tundish ine simba re7 T kuita ESR (electroslag heat) mudziyo, zviri mukati meisiri-metallic inclusions muupfu hwesimbi inomhanya nenitrogen atomization yakaderedzwa kusvika 1/10 yezvinyorwa zvepakutanga, uye simba rekukotama reASP powder kusvika ku300MP yesimbi yakawedzera kubva pa500MP yesimbi yakawedzera.

Chiyero chekudzivisa kusvibiswa kweoxide zvachose uye zvinobudirira kutora nzira ye "Single-flow" atomization, semuenzaniso, inotenderera electrode atomization nzira (ona inotenderera electrode nzira). Uye zvakare, kune vacuum mhinduro atomization nzira inogona zvakare kuburitsa yakakwira-kuchena spherical poda. Nheyo yacho ndeiyi: kana gasi supersaturated alloy fluid iri pasi pekumanikidzwa yakangoerekana yaonekwa kune vacuum, gasi rakanyungudutswa rinopukunyuka uye nekuwedzera, zvichiita kuti alloy liquid atomization, yobva yanyungudutswa kuita upfu. Kune nickel, mhangura, cobalt, iron uye aruminiyamu matrix alloys, nzira yekunyungudutsa haidrojeni inogona kushandiswa kuwana vacuum yakanyungudika gasi atomization poda.