Umthelela wenqubo yokubumba umjovo we-titanium powder ekusebenzeni

I-Metal powder sinteredizimbotshanaizinto zokwakha zenziwe ngensimbi noma i-alloy powders njengezinto zokusetshenziswa futhi zakhiwe futhi zifakwe emanzini okushisa aphezulu. Ziyizinto ezinama-porous ezinesakhiwo esiqinile.

Inqubo yokukhiqiza: ukuhlolwa - ukucindezela kwe-isostatic - vacuum ukushisa okuphezulu kwe-sintering

Izici zesakhiwo: Impahla iqukethe inqwaba yezimbotshana ezixhumene noma ezixhumeke kancane. Isakhiwo se-pore sakhiwe ngokupakisha izinhlayiya zempushana ezivamile nezingajwayelekile. Ubukhulu nokusatshalaliswa kwama-pores kanye nobukhulu be-porosity kungashintshwa ngokuya ngenhlanganisela yosayizi wezinhlayiyana ze-powder kanye nenqubo yokulungiselela. Hlangana nezidingo zamakhasimende zangempela.

Izinzuzo zomkhiqizo: ukungeneka okuhle, usayizi wembotshana olawulekayo kanye nezimbotshana, ukuma okuzinzile, ukunemba okuphezulu kokuhlunga, ukumelana nokugqoka, izakhiwo ezinhle zemishini, ukuguquguquka okuhle kokushisa, ukumelana nokushisa, kanye nezakhiwo zokushisa ukushisa, futhi kungenziwa i-backwashed futhi isetshenziswe izikhathi eziningi.

Izici ezisebenzayo ze-titanium sintered porous materials:

1. I-1) Ububanzi be-pore obufanayo, izimbotshana ezizinzile, nokusebenza kahle kokuhlukana okuphezulu.

1. I-2) I-porosity ephezulu, ukumelana nokuhlunga okuncane kanye nokusebenza kahle kokungena okuphezulu.

1. 3) Ukuzinza okuhle kwamakhemikhali, ukumelana nokugqwala kwe-asidi ne-alkali, kanye nezakhiwo zokulwa ne-oxidation.

1. I-4) Isakhiwo se-morphological sizinzile, azikho izinhlayiya eziwayo, futhi zihlangabezana nezidingo zokuhlanzeka kokudla kanye ne-GMP yezemithi.

1. I-5) Izakhiwo ezinhle zemishini, umehluko ophansi wengcindezi kanye nesilinganiso esikhulu sokugeleza.

1. I-6) Inekhono eliqinile le-antimicrobial futhi ayihlanganisi nama-microorganisms.

1. 7) Ingavuselelwa ku-inthanethi, kulula ukuyihlanza futhi inomsebenzi omude wenkonzo.

1. I-8) I-biocompatibility enhle kakhulu, ingasetshenziswa kabanzi ezimbonini zebhayoloji, zokudla, ezemithi nezezokwelapha.

1. 9) Ukusebenza okuhle kakhulu kwe-electromagnetic wave shielding.

1. I-10) Izici ezinhle zokuthambisa kanye nokumelana nomthelela.

I-Sintering ingenye yezinqubo ezibaluleke kakhulu ku-Inqubo ye-MIM. Ayisusi kuphela i-residual binder kodwa futhi iqeda ama-pores phakathi kwezinhlayiya zempushana, okwenzaUmkhiqizo we-MIMkuminyene ngokuphelele noma cishe kuminyene ngokuphelele. Iukufakwa kwe-titaniumingxubevange idinga izinga lokushisa eliphezulu. Imvelo, inqubo ye-sintering kufanele ivikelwe ngegesi ye-argon ngangokunokwenzeka. Isikhathi se-sintering kulokhu kuhlolwa sisethelwe ukugcina izinga lokushisa lingaguquki imizuzu eyi-120, futhi izinga lokushisa eliphakeme lingu-1220 ℃, 1240 ℃, 1250 ℃, 1270 ℃ no-1290 ℃ ngokulandelana kwezingxenye ezidwetshiwe ze-TC4 nezingxenye eziyindilinga. Izingxenye zomumo zisikiwe.

Inqubo ye-Sintering yezingxenye eziqinile ze-TC4

Inqubo ye-Sintering yezingxenye eziyindilinga

Kusukela enqubweni ye-sintering yezingxenye eziyindilinga, kungabonakala cishe ukuthi uma i-TC4 ihlala imizuzu engu-120, ukuminyana okuphezulu kungatholakala ku-1250 ° C, futhi ukuminyana kuncipha kancane njengoba izinga lokushisa likhuphuka. Lokhu kungenxa yokuthi ukukhula okusanhlamvu kwenzeka emazingeni okushisa aphezulu kakhulu. Izikhala phakathi kwemingcele yokusanhlamvu nazo ziba zinkulu, okuphinde kubangele ukuthi amandla esivuno sezingxenye eziqinile eziqinile abe ngaphansi kuka-1250°C ngemva kwezinga lokushisa eliphezulu.

Umdwebo we-TC4 we-metallographic ku-1250 ℃

Izingxenye eziyindilinga ze-TC4 ezihlanganisiwe

Ukuze siqonde ubudlelwano phakathi kwamazinga okushisa ahlukene nezikhathi zokubamba kanye nokuminyana kwe-TC4 sintering, sikhethe u-1240°C, 1250°C no-1270°C ukuze senze ukuhlolwa njengoba kuboniswe ngezansi. Umkhathi we-sintering wawuyimvelo yonke ye-argon gas.

Umkhathi we-sintering u-argon

Ukucubungula nokuhlaziya idatha

Ngokusho kwedatha yokuminyana yesampula ngemuva kokucwiliswa, akunzima ukubona ukuthi ukuminyana okutholwe ngokubamba izinga lokushisa ku-1250 ° C imizuzu engu-120-180 kuphakeme kunalokho okutholwe ezinye izinqubo. Ngokusekelwe ebudlelwaneni obuphakathi kwenqubo ye-sintering yezingxenye ezidwetshiwe ze-TC4 kanye nezingxenye eziyindilinga ze-TC4, siphinda siphethe ngokuthi ukuminyana kungaphezulu kwalokho okutholwe ezinye izinqubo. Ukuminyana namandla okukhiqiza kuyahambisana, ngakho-ke ukuminyana kanye nezakhiwo zemishini ezitholakala ngokubamba izinga lokushisa ku-1250 ° C nge-120min ~ 180min ziphakeme kakhulu; lokhu kungenxa yokuthi izinga lokushisa eliphezulu kakhulu kanye nesikhathi esifushane sokubamba akuthuthukisi inqubo ye-titanium alloy sintering. Amakristalu e-Titanium alloy aminyene kakhulu. Ngokufanayo, izinga lokushisa eliphansi kanye nokugcinwa kokushisa kwesikhathi eside kuzobangela amandla okushayela okungaphezulu kwempushana ukuthi asetshenziswe ngokuqhubekayo ngenxa yezinga eliphansi lokusabalalisa kwemingcele yokusanhlamvu. Ngesikhathi sokunyakaza kanye nenqubo yokusabalalisa kwemingcele yokusanhlamvu, ukunqwabelana okuhle nokushelela kwe-crystal lattice akukwazi ukufezwa. Ngale ndlela, kusenezikhala ezithile ngaphakathi ezingenakuqedwa, okwenza kungenzeki ukufeza ukuminyana okungcono.

Ekuphetheni

Inqubo yokwenziwa kwezimboni ye-MIM titanium alloy iyinkimbinkimbi, futhi kunezici eziningi ezithinta ukuminyana kokugcina kanye nezakhiwo zemishini zomkhiqizo. Ngaphansi kwalezi zimo zokuhlola, ngemva kokucutshungulwa okuphelele kokuminyana komkhiqizo nezici zokuwumshini, sisebenzise isithando somlilo sensimbi se-vacuum ephezulu se-HP ukuze siqhubeke sishisela ku-1250°C imizuzu engu-120. Lokhu kuvumela i-TC4 ukuthi ibe nokuminyana okuphezulu futhi ithole amandla aphezulu okukhiqiza, okuvula indlela yokwenziwa kwezimboni kwe-MIM-TC4.