Ngā Whakamahinga o te Konukura Kobalta i roto i te Ahumahi Taputapu Tapahi
He konganuku rautaki te Cobalt e whai wāhi nui ana ki te ahumahi hou, inā koa i te rāngai hangahanga, e hiahia ana kia tino tika te mahi miihini. I roto i te ahumahi taputapu tapahi, e mōhiotia ana te cobalt hei huānga whakarewa ka taea te whakapai ake i te ātete wera, te pakeke, me te ātete kakahu. Nō reira, he maha ngā wā ka whakamahia te cobalt i roto i ngā momo taputapu tapahi - mai i ngā mata wiri me ngā mira mutunga ki ngā whao me ngā whakaurunga tapahi - e mahi ana i raro i ngā āhuatanga tino kino pēnei i te waku nui me te pāmahana teitei.
Kia mōhio ki ngā āhuatanga o te cobalt
I runga i ngā rauemi, he pai ake ngā āhuatanga ā-pūkaha me te wera o te cobalt hei wāhanga koranu. He teitei te ira rewa o te cobalt (tata ki te 1.495°C), he pai te pumau o te wera, ā, he kaha ki te pupuri i te pakeke i ngā pāmahana teitei. I roto i ngā tukanga tapahi whakarewa, ka tino teitei te wera e puta mai ana i te waku i waenga i te taputapu me te wāhanga mahi. Mena kāore e taea e te rauemi taputapu tapahi te pupuri i tōna pakeke, ka tere te mangu o te mata tapahi, ka puta te āhua kirihou, ka pakaru rānei. Ka āwhina te cobalt ki te ārai i ēnei āhuatanga.
He mahi anō tā te kopara ki te hanga i tētahi hanganga moroiti pumau ake i roto i ētahi koranu. Ko te tikanga ka kaha ake te pakari o ngā taputapu tapahi ina pāngia e ngā kawenga ru, ngā tere hurihuri teitei, te tapahi wā poto rānei (hei tauira, i roto i ngā tukanga mira e tapahi ana i ngā mata me ngā okiokinga wā poto).
Te tūranga o te cobalt i roto i te HSS (High Speed Steel)
Ko tētahi o ngā whakamahinga rongonui o te cobalt i roto i te umanga taputapu tapahi ko te maitai tere-rahi (HSS). He whānuitia te whakamahinga o te HSS i roto i te hanga i ngā mata wiri, ngā taputapu, ngā riimere, me ngā taputapu mira. Ka tāpirihia te cobalt ki te HSS hei whakanui ake i tōna pakeke whero, arā, te kaha o te maitai ki te noho pakari ahakoa ka piki te pāmahana tapahi.
Ko tētahi tauira noa ko te cobalt HSS, e mōhiotia whānuitia ana ko te "HSS-E" ko te "cobalt HSS" rānei, he momo kei roto ko te 5% ki te 8% te cobalt. Mā tēnei ihirangi cobalt ka taea e ngā taputapu tapahi HSS te mahi i ngā tere tapahi teitei ake i te HSS tikanga, inā koa ka tapahia ngā rauemi uaua ki te mīhini pērā i te maitai kore waikura, te maitai koranu, ngā rauemi kukū teitei rānei.
Ko ngā painga o te cobalt HSS ko:
1. He ātete wera ake, kia kaha ake ai te ātete o te mata tapahi ki te mangu.
2. Ka roa ake te ora o ngā taputapu mō ngā mahi taumaha.
3. Mahi pumau i roto i ngā tapahi e whakaputa ana i te wera nui.
4. He ātete ake ki te whakangawari, he ngoikore tēnei i te nuinga o te wā o te HSS paerewa.
Heoi, he mea nui kia mōhiotia ko te pikinga o te pakeke me te ātete wera ka taea hoki te hanga i te rauemi kia paku pakarukaru ake mena kāore te hoahoa taputapu me ngā tawhā tapahi e tika ana. Nō reira, he mea nui tonu te whiriwhiri i te āhua taputapu tika me te rautaki tapahi.
Ko te kopara i roto i te kāpira sima (kāpira sima)
Haunga te HSS, he mahi nui tā te cobalt i roto i ngā rauemi taputapu tapahi e kiia nei ko te carbide simented, ko te carbide sintered rānei—ko te tikanga he carbide tungsten (WC) te pūtake. I roto i te carbide sintered, kāore te cobalt e mahi hei māngai whakapakeke matua, engari hei here e pupuri ana i ngā matūriki carbide kia noho tahi hei hanganga matotoru, kaha.
He tino mārō, he ātete hoki ki te pakarukaru ngā matūriki WC, engari ki te kore te here e tika ana, ka pakarukaru rawa te rauemi. He huinga āhuatanga o te Cobalt:
– Ka piki ake te pakari, ka nui ake te ātete o te taputapu ki te pakaru.
– He kaha ake te here i waenga i ngā poraka, ka pā ki te kaha o te whao.
– Te ātete ki ngā kawenga ru, inā koa i te tapahi ā-wā.
I roto i te umanga taputapu tapahi, he maha ngā wā ka hangaia ngā whakaurunga warowaiha mō te huri me te mira me tētahi hanganga here kobalta motuhake. Ka pā te nui o te kobalta ki ngā āhuatanga matua o te taputapu:
– He konukuraiti teitei ake → he pakari ake, he pai mō te taratara, mō ngā rauemi rānei e hua ai ngā kawenga ru.
– He iti ake te konukuraiti → he mārō ake, he ātete ki te kakahu, he pai mō te whakaoti me ngā tere teitei, engari he pakarukaru ake.
Nō reira, ka noho te cobalt hei huānga matua mō te "whakatikatika" i te taurite i waenga i te ātete ki te kakahu me te pakari i roto i ngā whakaurunga carbide.
Ngā konukōrei-rahi e hangai ana ki te kobalt mō ngā tono motuhake
Haunga te mea he huānga whakakoi i roto i te maitai tere-rahi (HSS) he mea here rānei i roto i ngā warowaihā, ko te cobalt te rauemi turanga mō ētahi superalloys. Ahakoa he nui ake te whakamahinga i roto i ngā tāhūhū, te rererangi, me ngā wāhanga pāmahana-teitei, ko ētahi tono taputapu tapahi motuhake e whakamahi ana i ngā koranu kei runga i te cobalt nā te mea he ātete ki te wera, te waikura, me te waikura.
I roto i te horopaki o ngā taputapu tapahi, ka whakamahia ngā koranu cobalt i ētahi wā ki ngā wāhanga e hiahia ana kia ātete ki ngā pāmahana tino nui, ki ngā taiao mahi matū kino rānei. Ahakoa kāore i te rongonui pērā i te HSS, i te carbide rānei, he otinga ngā koranu cobalt superalloys mō ngā tono motuhake tino uaua.
Te pānga o te konukura ki te mahi tapahi
I roto i te mahi miihini, ka whai wāhi te cobalt ki te mahi a te taputapu tapahi mā roto i ētahi tikanga matua:
1. Ka roa ake te koi
I te pikinga ake o te wera, ka mau tonu te āhua o te mata tapahi mā te whakamahi i tētahi taputapu ātete-ngawari. Mā tēnei ka whakaitihia te auau o te whakakoi anō, te whakakapi rānei i te mea kua tāpirihia.
2. Whakaitihia te mōrearea o te pakaru o te wera
I te wā e tere ana te tapahi, ka puta ngā huringa wera-mātao, inā koa ka whakamahia te whakamatao. Ka taea e ngā rauemi ngoikore ki te ru wera te pakaru. Ka āwhina te kopara ki te whakapai ake i te ātete ki ēnei āhuatanga, inā koa i roto i ngā hanganga karāhe me te here tika.
3. Whakanuia te hua
Ko ngā taputapu tapahi ka taea te mahi i ngā tere tapahi teitei ake ka pā tika ki te putanga whakaputa. Ahakoa he nui ake te utu o ngā taputapu, ka iti ake te utu katoa mō ia wāhanga nā te mea ka poto ake te wā tukatuka me te wā kore mahi.
4. Te ōritetanga o te kounga o te mata
Ko te mata hou e kore e tere te pakaru ka hua ake he kounga mata pumau. He mea nui tēnei i roto i ngā ahumahi e hiahia ana ki ngā manawanui pakari, pēnei i te motuka, te pokepokea me te mate, me te hanga tika.
Ngā wero: ngā āhuatanga utu, tuku, me te hauora
Ahakoa ōna painga nui, he maha ngā wero kei te whakamahinga o te cobalt. I te taha ōhanga, he konganuku te cobalt e rerekē ana tōna utu nā te tuku o te ao, te tono ahumahi, me ngā take ā-rohe. Me whakataurite e te umanga taputapu tapahi ngā whakaritenga mahi me te whai hua o te utu, ka hua ake ngā mahi auaha pēnei i te arotau i te nui o te cobalt, te whakamahi i ngā paninga matatau, te whakawhanake rānei i ngā here rerekē.
Hei tāpiri atu, mai i te tirohanga haumaru mahi, ka taea e te puehu kobalta me ētahi matū te whakararuraru mēnā ka hongia mō te wā roa. I roto i ngā tukanga huri, whakakoi, whakaputa paura whakarewa rānei, he mea nui te whakahaere puehu, te hauhautanga tika, me te whakamahi i ngā taputapu tiaki tinana tika. Ehara i te mea kua "rāhuitia" te kobalta, engari e whakanui ana i te hiranga o te whakahaere OHS i roto i ngā taiao hangahanga.
Auahatanga: ngā paninga me te hangarau rauemi hei whakaora i te konukura
Kei te whanake tonu te umanga taputapu tapahi, ā, he wāhanga nui tonu te cobalt, engari kei te "atamai" haere tōna whakamahinga. He maha ngā whakaurunga carbide hou e whakaatu ana i ngā paninga pēnei i te TiAlN, AlCrN, ētahi atu paninga paparanga maha rānei hei whakarei ake i te ātete ki te wera me te kakahu. Mā te paninga tika, ka taea e ngā taputapu te whakatutuki i te mahi teitei me te kore e nui rawa te ihirangi cobalt.
I tētahi atu taha, kei te whanake haere hoki te hangarau hanganga moroiti o te warowaihā, pērā i te whakahaere i te rahi o te kōpura me te tohatoha here, kia taea ai e te taputapu te whakatutuki i te huinga pakeke-pakaru tino pai. Ko te whāinga matua ko te whakaputa i ngā taputapu tapahi he ātete ki te kakahu, he pumau ake, he ohanga ake hoki.
Whakamutunga
He mea nui te kopara i roto i te umanga taputapu tapahi nā tōna mahi ki te whakapai ake i te ātete wera, te pakeke, me te ātete kakahu. I roto i te maitai tere-rahi, ka āwhina te kopara ki te pupuri i te pakeke i ngā pāmahana teitei, ka pai ai te taputapu mō ngā rauemi uaua me te tapahi tere. I roto i te karawiti kua whakatōngia, ka mahi te kopara hei here, ka whakanui ake i te pakari me te pono o te whakauru. Ahakoa kei te mau tonu ngā wero e pā ana ki te utu, te tuku, me te hauora mahi, kei te taea e ngā mahi auaha i roto i ngā paninga me te hangarau rauemi te whakamahi kopara kia pai ake te whai hua.
I te whakakotahitanga o ngā āhuatanga papai me te maha o ngā whakamahinga, ka noho tonu te konukura hei wāhanga matua o te whanaketanga o ngā taputapu tapahi whai hua, tika, me te pakari i roto i te ao hanga.
