Zvekudzvanya zvinodziya, inoteedzana kuteedzana kwekumanikidza uye tembiricha kunoshandiswa. Kazhinji, iko kumanikidzwa kunoiswa mushure mekunge kumwe kudziya kwaitika nekuti kumanikidza pakadzika tembiricha kunogona kuve nemhedzisiro pane iyo chikamu uye kushandisa. Kupisa kwekutsimbirira kwakapisa kune anoverengeka mazana madhigirii akaderera pane akajairwa sintering tembiricha. Uye kuda kuzere densification kunoitika nekukurumidza. Iko kumhanyisa kwemaitiro pamwe netembiricha yakadzika inodikanwa nemasikirwo akaganhura huwandu hwekukura kwezviyo.
Imwe nzira inoenderana, inotsvaira plasma sintering (SPS), inopa imwe nzira kune yekunze resistive uye inductive modes yekupisa. MuSPS, sampuro, kazhinji hupfu kana chakapatsanurwa chikamu chakasvibirira, chakatakurwa mu graphite inofa nezvibhakera zve graphite mukamuri yekutsvaira uye pombi yeDDC yazvino inoiswa pazvibhakera, sezvakaratidzwa muMufananidzo 5.35b, apo kumanikidzwa kunoiswa. Ikozvino kunokonzeresa kupisa kweJoule, uko kunokwidza tembiricha yesimendi nekukurumidza. Iyo yazvino inofungidzirwawo kuti inokonzeresa kuumbwa kweplasma kana kupisa kubuda munzvimbo yepore pakati pezvimedu, izvo zvine mhedzisiro yekuchenesa nzvimbo dzepasuru nekusimudzira sintering. Iko kuumbwa kweplasma kunonzwisisika kuyedza kuyedza uye iri musoro wekupokana. Maitiro eSPS akaratidzirwa kuve anoshanda kwazvo kune densification yezvinhu zvakasiyana siyana, zvinosanganisira simbi uye ceramics. Densification inoitika pakadzika tembiricha uye inopedzwa nekukurumidza kupfuura dzimwe nzira, kazhinji zvichizogadzira michero yakanaka yezviyo.
Kupisa Isostatic Kudzvanya (HIP). Kupisa isostatic kudzvanya ndiko kushandiswa panguva imwe chete kwekupisa uye hydrostatic kumanikidza kuumbana uye kuomesa poda compact kana chikamu. Maitiro acho akafanana nechando kutonhora isostatic kumanikidza, asi nehurefu hwekupisa uye gasi rinotumira kumanikidza kuchikamu. Magasi eInert akadai seArgon akajairika. Upfu hwakaomeswa mumudziyo kana mugaba, uyo unoshanda sechipingamupinyi chakaremara pakati pegasi rakamanikidzwa nechikamu. Neimwe nzira, chikamu chakaumbanidzwa uye chakatemerwa kusvika pakuvharwa kwepore chinogona HIPed mu "isina mudziyo" maitiro. HIP inoshandiswa kuzadzisa densification yakazara muupfu simbi. uye zvedongo kugadzirisa, pamwe nechimwe chikumbiro mune densification ye castings. Iyo nzira inonyanya kukosha kune yakaoma kusimbisa zvinhu, senge zvinokanganisa alloys, superalloys, uye nonoxide ceramics.
Mudziyo uye encapsulation tekinoroji yakakosha kune iyo HIP maitiro. Midziyo yakapusa, senge cylindrical simbi magaba, anoshandiswa kuwanda mabiridhi ealloy powder. Maumbirwo akaomarara anogadzirwa achishandisa midziyo inoratidzira chikamu chekupedzisira geometri. Midziyo yemidziyo inosarudzwa kuve inodonha-yakasimba uye yakaremara pasi pekumanikidza uye tembiricha mamiriro eiyo HIP maitiro. Midziyo yemidziyo inofanirwa zvakare kunge isingaite nehupfu uye nyore kubvisa. Zveupfu simbi, midziyo yakagadzirwa kubva pamashizha esimbi yakajairika. Dzimwe sarudzo dzinosanganisira girazi uye mapurasitiki ane ceramics akaiswa mune yechipiri simbi inogona. Girazi encapsulation yehupfu uye preformed zvikamu zvakajairika mune zvedongo HIP maitiro. Kuzadza nekubuda mumudziyo idanho rakakosha iro rinowanzoda zvigadziriswe pamudziyo pachawo. Dzimwe nzira dzekupukunyuka dzinoitika patembiricha yakakwira.
Izvo zvakakosha zvikamu zveiyo system yeHIP ndiyo yekumanikidza mudziyo ine mahedzi, kumanikidza gasi uye kutambidza michina, uye kudzora zvemagetsi. Mufananidzo 5.36 inoratidza muenzaniso schematic yeHIP set-up. Pane maviri akakosha modes ekushanda kweiyo HIP maitiro. Munzvimbo inopisa yekukodha, mudziyo unodziyirwa kunze kweiyo yekumanikidza mudziyo uye wotakurwa, kupisa kune tembiricha inodikanwa uye kumanikidzwa. Mune inotonhora kurodha mode, iyo mudziyo inoiswa mukati yekumanikidza mudziyo mukamuri tembiricha; ipapo kupisa uye kumanikidza kutenderera kunotanga. Kumanikidza mune huwandu hwema20-300 MPa uye tembiricha iri pakati pe500-2000 ° C zvakajairika.
Post nguva: Nov-17-2020