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 tino parakore, rongoā, oko pēhanga, me ngā tono matū 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 rohe whakarewa 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, ko te nuinga o ēnei ranunga he argon, he hīriama rānei, me te iti iho i te 5% o te hauhā waro, nā te mea ka tāpirihia 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 ka rite te whakatakotoranga o ngā pata, kia māmā ake ai te whakahaere i te puna whakarewa, ā, nō reira, ka māmā ake te whakahaere i te whakaurunga wera me te tere 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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