Ka matapakihia e Rob Koltz rāua ko Dave Meyer ngā āhuatanga ferritic (aukume) me te austenitic (kore-aukume) o ngā maitai kore-waikura kua whakarewaina. Getty Images
Q: Kei te whakarewa ahau i tētahi tāke i hangaia ki te maitai kore waikura 316, he mea kore-aukume. Kua tīmata ahau ki te whakarewa i ngā tāke wai ki te waea ER316L, ā, kua kitea he aukume ngā whakarewa. Kei te hē taku mahi?
A: Kāore he mea hei manukanuka māu. He mea noa te kukume i te aukume i ngā whakarewa i hangaia ki te ER316L, ā, he mea noa hoki te kore e kukume i te aukume i ngā rau me ngā rau kua hurihia e 316.
He maha ngā āhua o ngā koranu rino i runga i te pāmahana me te taumata koranu, ko te tikanga he rerekē te whakaritenga o ngā ngota i roto i te konganuku. Ko ngā āhua e rua e tino kitea ana ko te austenite me te ferrite. Ko te austenite he kore-aukume, ko te ferrite he aukume.
I roto i te maitai waro noa, he āhua te austenite e noho ana i ngā pāmahana tiketike anake, ā, i te whakamataotanga o te maitai, ka huri te austenite hei ferrite. Nō reira, i te pāmahana rūma, he aukume te maitai waro.
He maha ngā momo maitai kore waikura, tae atu ki te 304 me te 316, e kiia ana he maitai kore waikura austenitic nā te mea ko te austenite te wāhanga matua i te pāmahana rūma. Ka totoka ēnei maitai kore waikura hei ferrite ka huri hei austenite ina whakamataohia. Ka whakahaerehia ngā pereti me ngā rau maitai kore waikura austenitic ki ngā mahi whakamatao me te hurihuri, e whakarite ana kia hurihia ngā ferrite katoa hei austenite.
I waenganui o te rautau 20, i kitea i te wā e whakarewahia ana ngā maitai kore waikura austenitic, ko te aroaro o ētahi ferrite i roto i te konganuku whakarewa ka ārai i te pakaru iti (ngatata) ka puta ina tino austenitic te konganuku whakakī. Hei ārai i te pakaru iti, ko te nuinga o ngā konganuku whakakī mō ngā maitai kore waikura austenitic kua hangaia kia mau ki te 3% ki te 20% ferrite, kia kukume ai i ngā aukume. Inaa, ko ngā ine e whakamahia ana hei ine i te ihirangi ferrite i roto i ngā whakarewa maitai kore waikura ka taea hoki te ine i te taumata o te kukume aukume.
He maha ngā whakamahinga o te 316, he mea nui te whakaiti i ngā āhuatanga aukume o te whakarewa, engari he onge te whakamahinga o tēnei i roto i ngā tāke. Ko tāku tumanako ka taea tonu e koe te whakarewa me te kore e manukanuka.
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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