1. Tūhono
Ka taea te whakamahi i ngā momo whakarewa katoa he iti iho i te 3000 ℃ te pāmahana mō te whakarewa W, ā, ka taea te whakamahi i ngā whakarewa parahi, hiriwa rānei mō ngā wāhanga he iti iho i te 400 ℃ te pāmahana; Ko ngā konganuku whakakī he koura, he konupūmā, he konupūmā, he palladium, he wiri rānei te nuinga o te wā e whakamahia ana mō ngā wāhanga e whakamahia ana i waenga i te 400 ℃ me te 900 ℃; Mō ngā wāhanga e whakamahia ana i runga ake i te 1000 ℃, ko ngā konganuku parakore pēnei i te Nb, Ta, Ni, Pt, PD me te Mo te nuinga o te wā e whakamahia ana. Kua eke te pāmahana mahi o ngā wāhanga i whakarewahia ki te whakarewa turanga konupūmā ki te 2150 ℃. Mena ka whakahaerehia te maimoatanga horapa 1080 ℃ i muri i te whakarewa, ka taea e te pāmahana mahi mōrahi te eke ki te 3038 ℃.
Ko te nuinga o ngā tūhono e whakamahia ana mō te whakakanapa w ka taea te whakamahi mō te whakakanapa Mo, ā, ka taea te whakamahi i ngā tūhono parahi, hiriwa rānei mō ngā wāhanga Mo e mahi ana i raro i te 400 ℃; Mō ngā taputapu hiko me ngā wāhanga kore-hanganga e mahi ana i te 400 ~ 650 ℃, ka taea te whakamahi i ngā tūhono Cu Ag, Au Ni, PD Ni, Cu Ni rānei; ka taea te whakamahi i ngā konganuku whakakī konganuku parakore, titanium rānei, me ētahi atu konganuku whakakī whakarewa parakore he teitei ngā ira rewa mō ngā wāhanga e mahi ana i ngā pāmahana teitei ake. Me mōhio ko ngā konganuku whakakī konganuku, cobalt me te nickel kāore i te tūtohutia kia kore ai e puta he matū pakarukaru i waenga i ngā konganuku i roto i ngā hononga whakakanapa.
Ina whakamahia ngā wāhanga TA, Nb rānei i raro i te 1000 ℃, ka taea te whiriwhiri i ngā werohanga parahi, konupora, cobalt, titanium, nickel, koura me te palladium, tae atu ki te Cu Au, Au Ni, PD Ni me te Pt Au_ Ni me te Cu Sn he pai te makuku ki te TA me te Nb, he pai te hanga hononga whakakā, ā, he kaha te hononga. Nā te mea ka pakarukaru ngā konganuku whakakī hiriwa, me karo i ēnei i ngā wā katoa e taea ana. Mō ngā wāhanga e whakamahia ana i waenga i te 1000 ℃ me te 1300 ℃, ko ngā konganuku parakore Ti, V, Zr, ko ngā koranu rānei i runga i ēnei konganuku e hanga totoka ana, e wai ana hoki me whiriwhiri hei konganuku whakakī whakakā. Ina teitei ake te pāmahana ratonga, ka taea te whiriwhiri i te konganuku whakakī kei roto he HF.
W. Tirohia te ripanga 13 mō te whakapūmau i ngā konganuku whakakī mō Mo, Ta me Nb i te pāmahana teitei.
Ripanga 13 te whakakī i ngā konganuku whakakī mō te whakakī pāmahana teitei o ngā konganuku ātete
2. Hangarau whakapūmau
I mua i te whakapara, me tango marie te waikura i runga i te mata o te konganuku ātete. Ka taea te whakamahi i te huri ā-mīhini, te pupuhi onepu, te horoi ultrasonic, te horoi matū rānei. Me mahi tonu te whakapara i muri i te tukanga horoi.
Nā te pakarukaru o te W, me āta whakahaere ngā wāhanga w i te wā e huihui ana ngā wāhanga kia kore ai e pakaru. Hei ārai i te hanganga o te tungsten carbide pakarukaru, me karo te pa tika i waenga i te W me te graphite. Me whakakore te taumahatanga o mua i te tukatuka whakarewa, i te whakarewa rānei i mua i te whakarewa. He tino ngāwari te waikura o te W ina piki te pāmahana. Me teitei te tohu korehau i te wā e whakarewahia ana. Ina mahia te whakarewa i roto i te awhe pāmahana 1000 ~ 1400 ℃, kaua te tohu korehau e iti iho i te 8 × 10-3Pa. Hei whakapai ake i te pāmahana rewa me te pāmahana ratonga o te hononga, ka taea te whakakotahi i te tukanga whakarewa me te maimoatanga horapa i muri i te whakarewa. Hei tauira, ka whakamahia te tūhono b-ni68cr20si10fel hei whakarewa i te W i te 1180 ℃. I muri i ngā maimoatanga horapa e toru o te 1070 ℃ /4h, 1200 ℃ /3.5h me te 1300 ℃ /2h i muri i te whakarewa, ka taea e te pāmahana ratonga o te hononga whakarewa te eke ki runga ake i te 2200 ℃.
Me whai whakaaro ki te iti o te tauwehenga wera i te wā e huihui ana i te hononga whakarewa o Mo, ā, me noho te āputa hononga ki roto i te awhe o te 0.05 ~ 0.13MM. Mena he taputapu e whakamahia ana, whiriwhiria he rauemi he iti te tauwehenga wera. Ka puta te whakahounga Mo ina nui ake te pāmahana whakahounga i te whakahounga mura, te oumu hau whakahaeretia, te oumu korehau, te oumu whakaawe me te whakamahana ātete, ka heke iho rānei te pāmahana whakahounga nā te horapa o ngā huānga whakarewa. Nō reira, ina tata te pāmahana whakahounga ki te pāmahana whakahounga, ka pai ake te poto o te wā whakahounga. Ina nui ake te pāmahana whakahounga i te pāmahana whakahounga o Mo, me whakahaere te wā whakahounga me te tere whakamatao kia kore ai e pakaru nā te whakamatao tere rawa. Ina whakamahia te whakahounga mura oxyacetylene, he pai te whakamahi i te rerenga whakauru, arā, te rerenga whakarewa borate ahumahi, te rerenga whakarewa hiriwa rānei me te rerenga pāmahana teitei kei roto te konupūmā fluoride, ka taea te whiwhi tiaki pai. Ko te tikanga ko te pania tuatahi he paparanga rerenga whakarewa hiriwa ki runga i te mata o Mo, kātahi ka pania te rerenga pāmahana teitei. He iti ake te pāmahana o te mahi a te rerenga hiriwa whakakoi, ā, ka taea e te pāmahana hohe o te rerenga pāmahana teitei te eke ki te 1427 ℃.
Ko ngā wāhanga TA, Nb rānei, he pai ake te whakawera i raro i te korehau, ā, kaua e iti iho i te 1.33 × 10-2Pa te nekehanga korehau. Mena ka whakawerahia i raro i te tiakitanga o te hau korehau, me tino tangohia ngā poke hau pēnei i te hauota waro, te haukini, te hauota me te hauhā waro. Ina whakawerahia, whakawerahia ātete rānei i te hau, me whakamahi he konganuku whakakī whakawera motuhake me te rere tika. Hei ārai i te TA, i te Nb rānei kei pā ki te hāora i te pāmahana teitei, ka taea te whakakikorua i tētahi paparanga parahi, nikara rānei whakarewa ki runga i te mata, ā, ka taea te whakahaere i te maimoatanga whakamahana horapa e rite ana.
Wā tuku: Pipiri-13-2022