He hanganga iti-wāhanga-rua te maitai kore-waikura takirua, ā, ko te wāhanga rōrahi o te ferrite me te austenite he tata ki te 50%. Nā te hanganga iti-wāhanga-rua, ka whakakotahihia e ēnei maitai ngā āhuatanga pai rawa atu o ngā maitai kore-waikura ferritic me te austenitic. I te nuinga o te wā, ka whakaratohia e te wāhanga ferrite (whakawhitinga poraka pokapū-tinana) he kaha miihini teitei, he pakari pai me te ātete waikura pai, ko te wāhanga austenite (whakawhitinga poraka pokapū-mata) he pai te ngāwari.
Nā te whakakotahitanga o ēnei āhuatanga i whānuitia ai te whakamahinga o ngā maitai kowiri tira takirua i roto i ngā ahumahi matū hinu, penupenu me te pepa, moana me te whakaputa hiko. Ka taea e rātou te tu atu ki ngā mea waikura, te whakaroa i te wā ratonga, me te mahi i roto i ngā āhuatanga taiao tino kino.
Mā ngā rauemi kaha-teitei ka taea e koe te whakaiti i te matotoru me te taumaha o te wāhanga. Hei tauira, ka taea e te kowiri tira super duplex te whakarato i te kaha whakaputa e toru ki te whā ngā wā teitei ake me te ātete teitei ake ki te waikura poka i te kowiri tira 316.
E toru ngā momo o ngā maitai kore waikura takirua, i runga i te nui o te chromium (Cr) me te tau ōrite o te ātete poka (PREN):
Ko tētahi o ngā āhuatanga matua o te whakarewa i te DSS, SDSS, HDSS me ngā maitai kowiri tira motuhake ko te whakahaere i ngā tawhā whakarewa.
Ko ngā whakaritenga tukanga whakarewa o te umanga hinu matū e whakatau ana i te uara PREN iti rawa e hiahiatia ana mō ngā konganuku whakakī. Hei tauira, e hiahiatia ana e te DSS he PREN o te 35, ā, e hiahiatia ana e te SDSS he PREN o te 40. E whakaatu ana te Pikitia 1 i te DSS me tōna konganuku whakakī e ōrite ana mō te GMAW me te GTAW. I te nuinga o te wā, ka ōrite te ihirangi Cr o te konganuku whakakī ki te konganuku turanga. Ko tētahi mahi hei whakaaro mā te whakamahi i te GTAW mō ngā pakiaka me ngā awa wera ko te whakamahi i ngā konganuku whakakī superalloy. Mena kāore te konganuku whakarewa i te ōrite nā te tikanga ngoikore, ka taea e te konganuku whakakī kua nui rawa te whakarewa te whakarato i te PREN e hiahiatia ana me ētahi atu uara mō te tauira whakarewa.
Hei tauira hei whakaatu i tēnei, ka tūtohu ētahi kaihanga kia whakamahia te waea whakakī SDSS (25% Cr) mō ngā koranu DSS (22% Cr), me te waea whakakī HDSS (27% Cr) i roto i ngā koranu SDSS (25% Cr). Mō ngā koranu HDSS, ka taea hoki e koe te whakamahi i te waea whakakī HDSS. Kei roto i tēnei maitai kore waikura austenitic-ferritic duplex tata ki te 65% ​​ferrite, 27% chromium, 6.5% nickel, 5% molybdenum, ā, e kiia ana he iti iho i te 0.015% te waro iti.
Ki te whakatauritea ki te SDSS, he nui ake te kaha hua o te tākai HDSS, ā, he pai ake te ātete ki te waikura o te poka me te kapiti. He nui ake hoki tōna ātete ki te pakaru ahotea i puta mai i te hauwai, ā, he nui ake tōna ātete ki ngā taiao waikawa kaha i te SDSS. Ko te tikanga o tōna kaha teitei he iti ake ngā reiti tiaki i te wā e hanga ana i ngā paipa, nā te mea kāore e hiahiatia he tātari huānga mutunga mō te konganuku whakarewa he rite te kaha, ā, he iti ake te tūpato o ngā paearu whakaae.
I te whānuitanga o ngā rauemi turanga, ngā whakaritenga miihini me ngā tikanga ratonga, whakaarohia te kōrero ki tētahi tohunga tono me te whakakī whakarewa DSS i mua i te tīmatanga o tō kaupapa e whai ake nei.
Ko te WELDER, i mua ko Practical Welding Today, e whakaatu ana i ngā tāngata tūturu e hanga ana i ngā hua e whakamahia ana e tātou, e mahi tahi ana hoki i ia rā, i ia rā. Neke atu i te 20 tau tēnei maheni e mahi ana ki te hapori whakarewa i Amerika Te Raki.
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