ASTM A350 LF1, LF2 ME LF3 NGĀ RINO WARO/KORANU
NGĀ ĀHUATANGA WHĀNUI
Ka whakamahia ēnei momo maitai hei maitai paipa, ā, hei hanga hoki i ngā flanges hanga. He pai mō te whakamahi tae noa ki te –20ºF (LF1,) –50ºF (LF2) me te –150ºF (LF3.)
Te Whakaingoatanga mā ngā Paerewa
Whāriki Nama. | MAI I | I ROTO | AISI |
1.5622 | 14Ni6 | - | A350 |
TE TĀTARITANGA MATUA
LF1:
C% | Mn% | Ā,% | S% | P% | Cr% | I roto i te% |
0.30 mōrahi | 0.6/1.35 | .15/.30 | .040 mōrahi | .035 mōrahi | 0.30 mōrahi | 0.40 mōrahi |
LF2:
C% | Mn% | Ā,% | S% | P% | Cr% | I roto i te% |
0.30 mōrahi | 0.6/1.35 | .15/.30 | .040 mōrahi | .035 mōrahi | 0.30 mōrahi | 0.40 mōrahi |
LF3:
C% | Mn% | Ā,% | S% | P% | Cr% | I roto i te% |
0.20 mōrahi | 0.90 | .20/.35 | .040 mōrahi | .035 mōrahi | 0.30 mōrahi | 3.3/3.7 |
NGĀ TONO
Ko te nuinga o ēnei maitai e whakamahia ana mō ngā paipa me ngā āputa i hangaia.
TE WHAKAHANGA
Ko te mea pai ko te hanga i ngā momo LF1 me LF2 i te pāmahana tata ki te 2250-2300ºF (1230-1260ºC) me kāore e taea i hangaia i raro i te 1650-1700ºF (900-925ºC.) Te Ka hangaia te karaehe LF3 i te pāmahana tata ki te 2150-2200ºF (1175-1205ºC) me kāore e taeai hangaia i raro i te 1700ºF (925ºC.)
TE WHAKAWERA/TE MAIMOATANGA WERA
Kāore e kore ka mahia tonutia te whakamahana i ngā maitai o ngā paipa i muri i te whakarewatanga. Ko te hanganga o ēnei maitai ka whakatauhia tuatahitia e te tukanga hurihuri/whakarewa. Ka tukuna te paipa mai i ngā maitai hurihuri wera, ko ngā flanges me ētahi atu mai i ngā whakarewatanga. Ko te tukanga whakarewa tuturu ka matua ki te whakarite i te pai me te haumaru o te paipa me tōna mahi i muri mai. He mea nui ngā maimoatanga whakamahana-mua me muri-mahana.
He ngāwari te whakarewa i ngā momo e toru kua whakarārangihia i konei mā ngā tikanga katoa kua whakamatauria.
TE ĀHEI MĪHINI
Mō ngā hononga me ngā flange i hangaia, ko ēnei tohu kēnekia mīhinihia kia rite ki te hiahia, ā, mā te wheako tonu e whakatau mēnā he pai ake te mahi mīhini i runga i tētahi hanganga kua hangaia, he hanganga kua whakaritea, he hanganga kua whakamahanatia rānei. Ahakoa pēhea, i runga i te āhua hiranga o te whakamahinga whakamutunga, me rapu tohutohu mai i tētahi kamupene maimoatanga wera rongonui..