Mphamvu ya titaniyamu ufa jekeseni akamaumba sintering ndondomeko pa ntchito

Metal ufa sinteredporouszinthu zopangidwa ndi zitsulo kapena aloyi ufa monga zopangira ndipo amapangidwa ndi sintered pa kutentha kwambiri. Iwo ndi porous zipangizo ndi dongosolo olimba.

Njira yopanga: kuwunika - kukanikiza kwa isostatic - vacuum kutentha kwambiri sintering

Zomangamanga: Zinthuzo zimakhala ndi ma pores ambiri olumikizidwa kapena olumikizidwa. Kapangidwe ka pore amapangidwa ndi stacking wokhazikika ndi wosakhazikika ufa particles. Kukula ndi kugawa pores ndi kukula kwa porosity akhoza kusintha malinga ndi ufa tinthu kukula kuphatikiza ndi kukonzekera ndondomeko. Kukwaniritsa zosowa zenizeni zamakasitomala.

Ubwino wa mankhwala: permeability wabwino, controllable pore kukula ndi pores, khola mawonekedwe, mkulu kusefera kulondola, kuvala kukana, zabwino makina katundu, madutsidwe matenthedwe matenthedwe, kukana kutentha, ndi katundu dissipation kutentha, ndipo akhoza backwashed ndi ntchito kangapo.

Kugwira ntchito kwa titaniyamu sintered porous zipangizo:

1. 1) yunifolomu pore awiri, pores khola, ndi mkulu kulekana dzuwa.

1. 2) High porosity, kukana pang'ono kusefera komanso kulowa bwino kwambiri.

1. 3) Kukhazikika kwamankhwala abwino, asidi ndi kukana kwa dzimbiri zamchere, komanso anti-oxidation properties.

1. 4) Mapangidwe a morphological ndi okhazikika, palibe tinthu tating'onoting'ono tating'ono, ndipo timakwaniritsa zofunikira zaukhondo wa chakudya ndi mankhwala a GMP.

1. 5) Zinthu zamakina zabwino, kutsika kwapang'onopang'ono komanso kuthamanga kwakukulu.

1. 6) Ali ndi mphamvu zowononga tizilombo toyambitsa matenda ndipo samagwirizana ndi tizilombo toyambitsa matenda.

1. 7) Itha kusinthidwanso pa intaneti, yosavuta kuyeretsa komanso imakhala ndi moyo wautali wautumiki.

1. 8) Biocompatibility yabwino kwambiri, imatha kugwiritsidwa ntchito kwambiri m'mafakitale azachilengedwe, chakudya, mankhwala ndi zamankhwala.

1. 9) Kuchita bwino kwambiri kwamagetsi otchinga mafunde.

1. 10) Makhalidwe abwino ochepetsetsa komanso kukana kwamphamvu.

Sintering ndi imodzi mwazinthu zofunika kwambiri pamaseweraChithunzi cha MIM. Sikuti amangochotsa zotsalira zotsalira komanso amachotsa pores pakati pa tinthu tating'onoting'ono, ndikupangitsaMtengo wa MIMwandiweyani kwathunthu kapena pafupifupi olimba. Thekuchuluka kwa titaniyamualoyi amafuna kutentha kwambiri. chilengedwe, ndondomeko sintering ayenera kutetezedwa ndi argon mpweya mmene ndingathere. Nthawi ya sintering mu mayesowa imayikidwa kuti isunge kutentha kwa mphindi 120, ndipo kutentha kwakukulu ndi 1220 ℃, 1240 ℃, 1250 ℃, 1270 ℃ ndi 1290 ℃ motsatana kwa magawo a TC4 ndi magawo ozungulira. Zigawo za mawonekedwe ndi sintered.

Sintering ndondomeko ya TC4 makoma mbali

Sintering ndondomeko ya zozungulira mbali

Kuchokera pazitsulo zozungulira, zikhoza kuwoneka kuti pamene TC4 imatha kwa mphindi 120, kachulukidwe kapamwamba kakhoza kupezeka pa 1250 ° C, ndipo kachulukidwe kameneka kamachepa pang'ono pamene kutentha kumawonjezeka. Izi ndichifukwa choti kukula kwa mbewu kumachitika pakatentha kwambiri. Mipata pakati pa malire a tirigu imakulanso, zomwe zimapangitsanso kuti mphamvu zokolola za zigawo zokhazikika zikhale zotsika kuposa 1250 ° C pambuyo pa kutentha kwakukulu.

Chithunzi cha TC4 metallographic pa 1250 ℃

Sintered TC4 magawo ozungulira

Kuti timvetsetse mgwirizano pakati pa kutentha kosiyana ndi nthawi yogwira ndi TC4 sintering densification, tinasankha 1240 ° C, 1250 ° C ndi 1270 ° C kuti tichite zoyesera monga momwe tawonetsera pansipa. The sintering atmosphere anali onse argon gasi chilengedwe.

The sintering atmosphere ndi argon

Kukonza ndi kusanthula deta

Malinga ndi kachulukidwe deta ya chitsanzo pambuyo sintering, sikovuta kuona kuti kachulukidwe kachulukidwe anapezerapo kutentha pa 1250 ° C kwa 120-180 mphindi ndi apamwamba kuposa analandira ndi njira zina. Kutengera ubale womwe ulipo pakati pa sintering ya magawo okokedwa a TC4 ndi magawo ozungulira a TC4, timaganizanso kuti kachulukidwe kake ndi wapamwamba kuposa momwe amapezera njira zina. Kuchulukana ndi mphamvu zokolola zimakhala zosagwirizana, kotero kuti kachulukidwe ndi makina omwe amapezeka pogwira kutentha kwa 1250 ° C kwa 120min ~ 180min ndizopamwamba kwambiri; Izi zili choncho chifukwa kutentha kwambiri komanso nthawi yochepa kwambiri sikuthandiza kuti titaniyamu alloy sintering ipite patsogolo. Titaniyamu alloy makhiristo ndi optimally densified. Mofananamo, kutentha kochepa komanso kusunga kutentha kwa nthawi yaitali kumapangitsa kuti mphamvu yoyendetsa ufa ikhale yogwiritsidwa ntchito mosalekeza chifukwa cha kufalikira kwapang'onopang'ono kwa malire a tirigu. Pakusuntha ndi kufalikira kwa malire a tirigu, kuphatikizana kwabwino ndi kutsetsereka kwa kristalo latisi sikungatheke. Mwanjira iyi, pali mipata ina mkati yomwe siingathe kuthetsedwa, zomwe zimapangitsa kuti zikhale zosatheka kukwaniritsa kachulukidwe kabwinoko.

Pomaliza

Njira yopangira mafakitale ya MIM titaniyamu alloy ndizovuta, ndipo pali zinthu zambiri zomwe zimakhudza kachulukidwe komaliza komanso makina azinthu. Pansi pamiyeso iyi, titaganizira mozama za kuchuluka kwazinthu komanso makina amakina, tidagwiritsa ntchito ng'anjo yachitsulo ya HP kuti isatenthetse pa 1250 ° C kwa mphindi 120. Izi zimathandiza TC4 kukhala ndi kachulukidwe wapamwamba ndikupeza mphamvu zokolola zambiri, ndikutsegula njira yopititsira patsogolo ntchito za MIM-TC4.