Ehara i te mea uaua te mahi me te kowiri tira, engari me tino aro ki ngā taipitopito te whakarewa. Kāore e mimiti te wera pērā i te konumohe ngawari, ā, ka ngaro pea te ātete ki te waikura mēnā ka nui rawa te wera e tāpirihia ana ki roto. Mā ngā tikanga pai ka mau tonu tōna ātete ki te waikura. Whakaahua: Miller Electric
Nā te ātete ki te waikura o te maitai kore waikura, he mea ātaahua tēnei mō ngā tono ngongo nui maha, tae atu ki ngā tono kai me inu parakore-teitei, rongoā, oko pēhanga me te hinu. Heoi, kāore tēnei rauemi e mimiti wera pērā i te maitai ngawari, te konumohe rānei, ā, ka taea e te whakarewatanga hē te whakaiti i tōna ātete ki te waikura. Ko te nui rawa o te wera e whakaurua ana me te whakamahi i te konganuku whakakī hē he take e rua.
Mā te whai i ētahi tikanga pai mō te whakarewa maitai kore waikura ka āwhina i te whakapai ake i ngā hua me te whakarite kia mau tonu te ātete o te konganuku ki te waikura. Hei tāpiri, mā te whakapai ake i te tukanga whakarewa ka hua mai ngā hua pai me te kore e whakararu i te kounga.
I roto i te whakarewa maitai kore waikura, he mea nui te whiriwhiri i te konganuku whakakī hei whakahaere i te nui o te waro. Me whakapai ake ngā konganuku whakakī e whakamahia ana mō te whakarewa paipa maitai kore waikura i te mahi whakarewa, ā, me tutuki hoki ngā whakaritenga tono.
Rapua ngā konganuku whakakī me te tohu "L", pērā i te ER308L, nā te mea he iti ake te ihirangi waro mōrahi e whakarato ana i tēnei, ā, ka āwhina i te pupuri i te ātete waikura o ngā koranu maitai kore waikura waro-iti. Mā te whakarewa i te konganuku turanga waro-iti ki ngā konganuku whakakī paerewa ka whakanui ake i te ihirangi waro o te hononga whakarewa, ka piki ake te tūponotanga o te waikura. Āta karohia ngā konganuku whakakī kua tohua ki te "H" nā te mea he nui ake te ihirangi waro o ēnei, ā, kua hangaia mō ngā tono e hiahia ana kia kaha ake i ngā pāmahana teitei.
I te wā e whakarewahia ana te maitai kore waikura, he mea nui hoki te whiriwhiri i tētahi konganuku whakakī he iti noa ngā taumata paru o ngā huānga (e mōhiotia ana ko ngā poke). Koinei ngā huānga toenga i roto i ngā rauemi mata e whakamahia ana hei hanga konganuku whakakī, tae atu ki te antimony, te arsenic, te phosphorus me te whanariki. Ka taea e rātou te pā nui ki te ātete waikura o te rauemi.
I te mea he tino tairongo te maitai kore waikura ki te wera e uru mai ana, he mea nui te whakarite hononga me te huihuinga tika ki te whakahaere i te wera hei pupuri i ngā āhuatanga o te rauemi. Nā te koretake o te taunga i waenga i ngā wāhanga, me noho roa te rama ki te wāhi kotahi, ā, me nui ake te konganuku whakakī hei whakakī i aua āputa. Ka taea e tēnei te whakanui ake i te wera ki te wāhi e pāngia ana, ka wera rawa te wāhanga. Ki te kore e taunga pai, ka uaua ake te whakakī i te āputa me te whiwhi i te urunga whakarewa e tika ana. Kia tupato kia uru pai ngā wāhanga ki roto i te maitai kore waikura.
He mea tino nui hoki te ma o tēnei rauemi. Mēnā he iti noa te paru, te poke rānei i roto i ngā hononga whakarewa, ka pāngia pea te hua whakamutunga e ngā hapa, ka whakaiti i te kaha me te ātete ki te waikura. Hei horoi i te papa i mua i te whakarewa, whakamahia he paraihe motuhake kowiri tira kāore anō kia whakamahia ki te maitai waro, ki te konumohe rānei.
I roto i te maitai kore waikura, ko te whakaaweawe te tino take o te ngaronga o te ātete ki te waikura. Ka tupu pea tēnei ina nui rawa te rerekētanga o te pāmahana whakarewa me te tere whakamatao, ka huri i te hanganga moroiti o te rauemi.
He rite te āhua me te kounga o tēnei whakarewa OD i runga i te paipa kowiri tira, i whakarewaina mā te whakamahi i te GMAW me te regulated metal deposition (RMD) me te kore e whakahokia te pakiaka o te ara, ki ngā whakarewa i hangaia ki te GTAW i whakahokia te ara.
Ko tētahi wāhanga matua o te ātete waikura o te maitai kore waikura ko te chromium oxide. Engari ki te nui rawa te ihirangi waro i roto i te whakarewa, ka puta te chromium carbide. Ka herea e ēnei te chromium, ka ārai i te hanganga o te chromium oxide e hiahiatia ana, ka puta ai te ātete waikura o te maitai kore waikura. Ki te kore e nui te chromium oxide, kāore te rauemi e whai i ngā āhuatanga e hiahiatia ana, ā, ka puta te waikura.
Ko te ārai i te whakararuraru ka whakawhirinaki ki te whiriwhiri i te konganuku whakakī me te whakahaere i te whakauru wera. E ai ki te kōrero i mua ake nei, he mea nui kia whiriwhiria he konganuku whakakī waro iti mō te whakarewa maitai kore waikura. Heoi, i ētahi wā ka hiahiatia te waro hei whakarato i te kaha mō ētahi tono. He mea nui rawa te whakahaere wera ina kore e taea te whakamahi i ngā konganuku whakakī waro iti.
Whakaitihia te roa o te wā e noho ana te hononga me te rohe e pāngia ana e te wera ki ngā pāmahana teitei—e kiia ana ko te 950 ki te 1,500 nekehanga Fahrenheit (500 ki te 800 nekehanga Celsius). Ko te iti o te wā e pau ana i te whakapiripiri i roto i tēnei awhe, ko te iti iho o te wera e puta mai ana. Me tirotiro tonu, me te mātakitaki hoki i te pāmahana i waenga i te tukanga whakapiripiri tono.
Ko tētahi atu kōwhiringa ko te whakamahi i ngā konganuku whakakī i hangaia ki ngā wāhanga whakarewa pērā i te titanium me te niobium hei ārai i te hanganga o te chromium carbide. Nā te mea ka pāngia hoki e ēnei wāhanga te kaha me te pakari, kāore e taea te whakamahi i ēnei konganuku whakakī i roto i ngā tono katoa.
Ko te whakarewatanga pewa hau tungsten (GTAW) mō te putanga pakiaka te tikanga tuku iho mō te whakarewatanga o ngā paipa kowiri tira. Ko te tikanga tēnei me horoi anō te hau argon hei āwhina i te ārai i te waikura i te taha o muri o te whakarewatanga. Heoi, kei te piki haere te whakamahinga o ngā tukanga whakarewatanga waea i roto i ngā ngongo kowiri tira. I roto i ēnei tono, he mea nui kia mārama ki te pānga o ngā hau tiaki rerekē ki te ātete waikura o te rauemi.
I te wā e whakarewahia ana te maitai kore waikura mā te whakamahi i te tukanga whakarewa pewa hau (GMAW), ka whakamahia te argon me te hauhā waro, he ranunga o te argon me te hāora, he ranunga hau-toru rānei (hīriama, argon, me te hauhā waro). Ko te tikanga, kei roto i ēnei ranunga te argon, te hīriama rānei, me te iti iho i te 5% o te hauhā waro, nā te mea ka whakaratohia e te hauhā waro te waro ki te puna whakarewa, ā, ka nui ake te tūponotanga o te pāwera. Kāore i te tūtohutia te argon parakore mō te GMAW i runga i te maitai kore waikura.
Kua hangaia te waea hau-hau mō te maitai kore waikura kia rere me te ranunga tuku iho o te 75% argon me te 25% waro hauhā. Kei roto i te hau ngā kai kua hangaia hei ārai i te waro mai i te hau tiaki kei poke i te whakarewa.
I te whanaketanga o ngā tukanga GMAW, kua māmā ake te whakarewa i ngā ngongo me ngā paipa kowiri tira. Ahakoa e hiahiatia tonutia ana ngā tukanga GTAW i ētahi tono, ka taea e ngā tukanga waea matatau te whakarato i te kounga ōrite me te hua teitei ake i roto i te maha o ngā tono kowiri tira.
He rite te kounga me te āhua o ngā whakarewa ID kowiri tira i hangaia ki te GMAW RMD ki ngā whakarewa OD e rite ana.
Mā te whakamahi i te tukanga GMAW poto-arahiko kua whakarerekētia pērā i te Miller's Regulated Metal Deposition (RMD) ka whakakorea te whakamuri i roto i ētahi tono maitai kore waikura austenitic. Ka taea te whai i te tukanga pakiaka RMD mā te GMAW pulsed, te whakakī me te taupoki rānei i te whakarewa arc flux-cored—he huringa e penapena ana i te wā me te moni ki te whakataurite ki te whakamahi i te GTAW me te whakamuri-purging, inā koa i runga i ngā paipa nui ake.
Ka whakamahia e te RMD te whakawhiti konganuku poto-ara iahiko e whakahaeretia ana kia puta he pewa marino, he pūmau, he puna whakarewa. Mā tēnei ka iti ake te tūponotanga o ngā takahuri makariri, te kore rānei o te hanumi, ka iti ake te tauhiuhi, ā, ka pai ake te putanga pakiaka paipa. Mā te whakawhiti konganuku e whakahaeretia ana kia tika te whakahaere ka whakaratohia he whakatakotoranga pata ōrite me te whakahaere ngāwari ake i te puna whakarewa, nō reira ka tere te whakauru wera me te whakarewa.
Ka taea e ngā tukanga rerekē te whakanui ake i te hua o te whakarewa. Ina whakamahia he RMD, ka taea te tere whakarewa ki te 6 ki te 12 inihi/min. Nā te mea ka whakanui ake te tukanga i te hua me te kore e whakamahanahia ngā wāhanga, ka āwhina i te pupuri i ngā āhuatanga me te ātete ki te waikura o te maitai kore waikura. Ka āwhina hoki te whakaiti i te whakauru wera o te tukanga ki te whakahaere i te whakarerekētanga o te papa.
Mā tēnei tukanga GMAW pāorooro ka poto ake te roa o te pewa, ka whaiti ake ngā koeko pewa, ā, ka iti ake te wera e uru mai ana i tērā i te whakawhiti pāorooro rehu tikanga. Nā te mea he porowhita kati te tukanga, ka tata korehia ngā rerekētanga o te nekehanga pewa me te tawhiti mai i te pito ki te wahi mahi. Mā tēnei ka māmā ake te whakahaere i te puna wai mō te whakarewa i roto i te wāhi me te kore wāhi. Hei whakamutunga, mā te hono i te GMAW pāorooro mō te pītiti whakakī me te taupoki me te RMD mō te pītiti pakiaka ka taea te mahi i te tukanga whakarewa mā te whakamahi i te waea kotahi me te hau kotahi, ka kore e roa te whakawhiti tukanga.
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