Mā te whiriwhiri i te hau ārai hē ka waiho pea koe me ngā whakarewa e kī ana i te porosity, te ruirui, te ngoikore rānei o te kaha—ahakoa kei te whakamahi koe i te waea MIG totoka me ngā taputapu tino pai. Ahakoa te āhua ngaro o te hau whakarewa MIG, ko te "tātai matua ngaro" te mea e pā tika ana ki ngā āhuatanga o te pewa, ngā tikanga whakawhiti whakarewa, me ngā āhuatanga miihini whakamutunga o te whakarewa. Kei raro nei, ka wehewehea e mātou he anga whakatau māmā hei āwhina i a koe ki te whiriwhiri i te hau ārai tika mō tō tono.
Te Anga Whakatau: Kimihia tō Hau Parepare Tino Pai
Ka tirohia e mātou ngā pātai matua e toru hei whakawhāiti i ō whiringa. Kāore he whakaaro pōhēhē atu - engari me whiriwhiri noa i ngā whiringa kua whakaritea i runga i ō hiahia tūturu.
Pātai 1: He aha te rauemi e whakarewahia ana e koe?
Ko te rauemi te mea tuatahi, te mea tino nui hoki. Me tīmata tātou ki te mea tino noa, ka neke atu ki ngā konganuku motuhake.
Rino Ngāwari (Te Horopaki Tino Noa)
Mō te hau hei whakarewa i te maitai ngawari ki te waea MIG totoka, e rua ngā kōwhiringa e whakamahia ana i te mākete. Anei te āhua o te whakakotahitanga:
Hau C25 (75% Ar, 25% CO2) – Te Kōwhiringa Tuatahi o te Ao
He aha i mahi ai: Ka tukuna e tēnei ranunga argon CO2 he pewa pumau, he iti noa te tauhiuhi whakarewa, ā, he maeneene te āhua whakarewa—ka whakaoti i ngā raruraru nui o te whakarewa maitai ngawari. Ka whakaitihia te ngaronga o ngā huānga koranu, ka whakanui ake i te kaha kume whakarewa, ā, ka mahi mō te nuinga o ngā tono, mai i ngā pepa angiangi ki ngā pereti matotoru-waenga. Ahakoa kei te mahi koe i te whakawhiti poto-ara, i te whakawhiti rehu rānei, ka noho ma, ka taea hoki te whakahaere i te tukanga e C25.C25
Pai rawa atu mō: Te nuinga o ngā mahi maitai ngawari e whai tikanga ana te kounga, te āhua, me te ngāwari o te whakahaere.
CO2 Parakore – Te Tauhokohoko Penapena-Utu
He aha i whakamahia ai: He iti ake te utu o te CO2 parakore i ngā hau whakaranu, ā, he mea ātaahua mō ngā mahi nui me te tahua iti. Ka hohonu ake hoki te urunga, he mea whai hua mō te whakarewa pereti matotoru me te kore e piko. Ko te utu: Me tumanako ka "pakeke ake" te pewa, ka nui ake te taupatupatu whakarewa, me te mata whakarewa taratara. Ka roa ake te wā e pau ana ki te horoi i muri i te whakarewa, ā, he nui ake te ngaronga o te koranu ki te C25.
Pai rawa atu mō: He maitai matotoru, ngawari, kāore he mea nui ki te āhua, engari ko te utu te mea nui.
Tohutohu ngaio: Ki te mea he maitai ngawari te nuinga o tāu whakarewa, ā, e hiahia ana koe ki tētahi tukanga ma, ngāwari hoki, tīmata ki te C25. Koinei te kōwhiringa tino maha ngā whakamahinga mō ngā waea MIG totoka.
Kowiri tira
Me pupuri te hau whakarewa maitai kore waikura i te ātete ki te waikura, kia pai ai te āhua o te whakarewa. Kāore e mahi te hauhā parakore i konei—ka kore e pai te makuku o te whakarewa, ka paru hoki.成形Kōwhiria he hau e toru ngā ranunga pērā i te Ar + 2-5% CO2 + 1-2% O2, te Ar rānei + 90% He + 2.5% CO2. Ka whakaitihia e ēnei ranunga te mānukanuka mata o te konganuku rewa, ka whakapai ake i te horapa o te whakarewa, ka whakaitihia hoki te ngaronga o te koranu, ka mau tonu ngā āhuatanga tiaki o te maitai kore waikura.
Konumohe
Me whakamahi te konumohe i te argon parakore, i te ranunga argon-hēriuma rānei. Ko te mahi matua a te argon he horoi i te kiriata konumohe waikura (he mea nui mō ngā whakarewanga kaha) me te whakau i te pewa. Mā te tāpiri i te hēriuma ka whakanui ake i te urunga wera, ka āwhina i ngā wāhanga konumohe matotoru ake mā te whakanui ake i te urunga me te tere whakarewa. Āta karohia te CO2, te O2 rānei i roto i te hau ārai konumohe—ka puta he porosity me ngā whakarewanga pakarukaru.
Pātai 2: Ko ēhea ngā Āhuatanga Whakarewa e Tino Hiahiatia Ana e Koe?
Ka pā tika te whiriwhiringa hau ki te āhua me te mahi o tō whakarewa. Whakatauritehia te hau ki ō āhuatanga matua:
- Me whānui ake ngā pīrere whakarewa, me papaku ake te urunga (he pai mō ngā pepa angiangi)? Kōwhiria he ōwehenga argon teitei ake – ka whakangawari i te pewa, ā, ka ārai i te wera.
- Me hohonu te werohanga mō ngā pereti matotoru? Ka nui ake te wera kukū mai i te CO2 parakore, i te ranunga CO2 teitei ake rānei.
- Kei te hiahia koe kia tere ake te tere o te whakarewa? Mā te ranunga argon-helium, C25 rānei ka nui ake te amperage me te kore e nui te tauhiuhi, ka nui ake te hua.
- Kāore koe i te pai ki te horoi i muri i te whakarewanga? Mā te C25, mā ētahi atu ranunga rānei he nui te argon, ka tino whakaiti i te para o te whakarewanga, ā, ka penapena i tō wā ki te huri me te whakaoti.
Pātai 3: He aha tāu Tahua?
Kia whai hua tātou—ko te tahua te mea e ārahi ana i ngā whakataunga maha. Anei te wehewehenga o ngā utu tuturu, ehara i te utu penehīni anake:
- CO2 Parakore: Ko te utu penehīni iti rawa i te tīmatanga, engari he nui ake ngā utu mō te wā roa mai i te wā horoi tāpiri me te pikinga ake o ngā para waea MIG totoka.
- Hauhanga C25: He nui ake te utu hau i te CO2 parakore, engari he iti ake ngā utu katoa nā te tere o te whakarewa me te iti o te mahi anō. Kāore he taputapu tāpiri e hiahiatia ana—he rango kotahi anake.
- Ngā ranunga-toru, ngā ranunga argon-helium rānei: He nui ake te utu mō ngā rauemi motuhake, engari he mea tika kia kore ai e pakaru ngā rauemi whakarewa utu nui.
Anei te mea nui: Ki te iti tō tahua engari he nui te rahinga o te maitai ngawari hei whakarewa, ka taea te whakamahi i te CO2 parakore—me whai whakaaro noa ki te wā horoi. Mō te nuinga o ngā toa, ko te C25 te mea pai rawa atu mō te utu me te mahi.
Tohutohu Tino Hira: Kaua e Whakangaromia he Kōwhiringa Penehīni Pai mā te Tatūnga Kino
Ahakoa te hau parepare tika, e kore e whakaora i tō whakarewa mēnā ka hē te rere o te hau, ka maroke rānei te hau. Kāore e taea te whiriwhiri i ēnei taipitopito:
Te Rere o te Hau (CFH/LPM)
Ki te iti rawa te rere, ka kore e tiakina tō whakarewa (ka puta te porous o te whakarewa); ki te nui rawa te rere ka puta te turbulence (ka mimiti te hau, ka puta hoki te porous). Mō te nuinga o ngā tono waea MIG totoka:
- Rino ngawari (C25, CO2 parakore rānei): 15-25 LPM (30-50 CFH)
- Kowiri tira (toru-ranunga): 18-28 LPM (38-60 CFH)
- Konumohe (ākona/ākona-hēriuma): 20-30 LPM (42-63 CFH)
Te Maroke o te Hau
He kaikōhuru puku te makuku i roto i te hau ārai. Ka puta te porowhita whakarewa, ā, ka ngoikore ngā whakarewa. Me whakamahi tonu he whakamaroke/tātari i roto i tō raina hau, ā, tirohia mēnā kei runga ake i te 0.5 MPa (70 psi) ō rango—i raro iho i tēnei pēhanga, ka kukū te makuku me ngā poke ki roto i te hau.
Te Mātāpono Whakamutunga me te Hipanga e Whai Ake Nei
Ko te ture matua: Whakatauritehia tō hau tiaki ki tō rauemi, whakatauritehia te kounga me te utu, ā, kia ma, kia tika hoki te tukunga o te hau. Kia tika tēnei, ā, kaWaea MIGka mahi i tōna tino pai.
Kia whiriwhiria e koe te hau parepare tika, ko te whiriwhiri i tētahi waea MIG totoka kounga teitei e ōrite ana ki te hau me tō rauemi te taahiraa e whai ake nei ki te angitu o te whakarewa. Mā te waea MIG totoka pai ka pumau te hanganga matū me te whāngai waea maeneene—ka mahi tahi me tō hau parepare kua whiriwhiria kia puta he whakarewa kaha, pumau i ngā wā katoa.
Wā tuku: Hanuere-03-2026