Don matsi mai zafi, ana amfani da jerin sarrafawa na matsa lamba da zafin jiki. Akai-akai, ana amfani da matsin lamba bayan an sami wani dumama saboda sanya matsin lamba a yanayin ƙananan yanayi na iya haifar da mummunan tasiri ga ɓangaren da kayan aikin. Yanayin zafi mai matse ɗari ya ƙasa da yanayin zafi na yau da kullun. Kuma kusan kusan cikawa yana faruwa cikin sauri. Gudun aiwatarwa da ƙananan zazzabin da ake buƙata ta halitta suna iyakance adadin haɓakar hatsi.
Hanyar da ke da alaƙa, ƙyallen ruwan jini (SPS), yana ba da madadin zuwa yanayin ƙin waje da yanayin ɗumi na dumama. A cikin SPS, samfurin, yawanci foda ko wani ɓangaren koren precompacted, ana ɗora shi a cikin hoto mai mutuɓe tare da naushi na hoto a cikin ɗakunan ajiya kuma ana amfani da ƙwanƙolin DC mai gudana a duk faɗin, kamar yadda aka nuna a Hoto 5.35b, yayin da ake amfani da matsa lamba. A halin yanzu yana haifar da dumama Joule, wanda ke ɗaga zafin yanayin samfurin cikin sauri. Hakanan yanzu ana tsammanin yana haifar da samuwar plasma ko fitowar ruwa a cikin ramin ɓoyayyen tsakanin ƙwayoyin, wanda ke da tasirin tsabtace ɓangaren ɓoye da haɓaka haɓaka. Tsarin plasma yana da wahalar tabbatar da gwaji kuma shine batun da ake tattaunawa akai. Hanyar SPS an nuna tana da matukar tasiri ga yawaitar abubuwa iri-iri, gami da karafa da tukwane. Densification yana faruwa a ƙananan zafin jiki kuma an kammala shi da sauri fiye da sauran hanyoyin, sau da yawa yana haifar da kyawawan ƙwayoyin microstructures.
Iararrawar Isostatic mai zafi (HIP). Matsalar zafi mai mahimmanci shine aikace-aikacen lokaci guda na zafi da matsin lamba na hydrostatic don ƙarawa da ƙara ƙamshin foda ko ɓangare. Tsarin yana kama da matsewar isostatic mai sanyi, amma tare da haɓakar zafin jiki da iskar gas da ke tura matsin lamba zuwa ɓangaren. Gas masu aiki kamar argon suna gama gari. Foda ya daskare a cikin akwati ko gwangwani, wanda ke aiki azaman lalataccen shinge tsakanin mataccen gas da ɓangaren. A madadin haka, za a iya yin HIPed a cikin wani ɓangaren da aka tara shi kuma aka sanya shi zuwa maɓallin rami. Ana amfani da HIP don samun cikakkiyar ƙaruwa a cikin ƙarfe na ƙarfe. da sarrafa yumbu, da kuma wasu aikace-aikace a cikin karuwar simintin gyare-gyare. Hanyar tana da mahimmanci musamman don da wuya a ninka abubuwa, kamar gami mai ƙyama, superalloys, da nonoxide ceramics.
Kayan kwalliya da fasahar encapsulation yana da mahimmanci ga aikin HIP. Ana amfani da kwantena masu sauƙi, kamar gwangwani na ƙarfe na silinda, don ɗimbin yawa na ƙananan foda. An kirkiro siffofi masu rikitarwa ta hanyar amfani da kwantena waɗanda suke yin sifar tsarin siram ɗin ƙarshe. An zaɓi kayan akwati don zama mai matse-ƙarfi da nakasawa a ƙarƙashin matsi da yanayin zafin jiki na tsarin HIP. Ya kamata kayan kwantena su zama basa aiki tare da foda kuma suna da saukin cirewa. Don aikin karafa na foda, kwantena da aka kera daga zanen karfe suna gama gari. Sauran zaɓuɓɓukan sun haɗa da gilashi da yumɓu masu ƙyalƙyali waɗanda aka saka a cikin gwangwani na ƙarfe na biyu. Encapsulation na gilashi na foda da preformed sassa na kowa a cikin yumbu HIP matakai. Cikewa da kwashe akwati wani muhimmin mataki ne wanda galibi ke buƙatar kayan aiki na musamman akan akwatin kanta. Wasu matakai na fitarwa suna faruwa a tsawan zafin jiki.
Babban mahimmin tsarin tsarin HIP shine jirgin ruwa mai matse jiki tare da masu zafi, matse iskar gas da kayan aiki, da sarrafa lantarki. Hoto na 5.36 yana nuna wani misali na tsarin saitin HIP. Akwai hanyoyi guda biyu na aiki don tsarin HIP. A cikin yanayin ɗorawa mai zafi, an zafafa akwatin a waje na jirgin ruwan matsa lamba sannan a ɗora, a dumama zuwa yanayin zafin da ake buƙata kuma a matse. A cikin yanayin ɗorawa na sanyi, an saka akwati a cikin jirgin ruwa na matsi a zazzabin ɗaki; to sai a fara zagaye na dumama da matsi. Matsin lamba a kewayon 20-300 MPa da zafin jiki a cikin kewayon 500-2000 ° C gama gari ne.
Post lokaci: Nuwamba-17-2020