Gradd a Chyfansoddiad Cemegol (%)
Gradd | C | Mn | P≤ | S≤ | Si | Cr | Mo |
T11 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 0.50-1.00 | 1.00-1.50 |
T12 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | ≤0.50 | 0.80-1.25 | 0.44-0.65 |
T13 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 1.90-2.60 | 0.87-1.13 |
Priodweddau Mecanyddol (MPa):
Gradd | Pwynt Tynnol | Pwynt Cynnyrch |
T11 | ≥415 | ≥205 |
T12 | ≥415 | ≥220 |
T13 | ≥415 | ≥205 |
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Arolygiad Diamedr Allan
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Archwiliad Trwch Wal
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Diwedd Arolygiad
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Arolygiad Straightness
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Arolygiad UT
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Arolygiad Edrychiad
Cynhyrchir tiwbiau dur di-dor aloi ASTM A213 naill ai trwy dynnu oer neu rolio poeth, fel y nodir.Bydd gradd TP347HFG wedi'i orffen yn oer.Rhaid gwneud triniaeth wres ar wahân ac yn ogystal â gwresogi ar gyfer ffurfio poeth.Rhaid ailgynhesu'r aloi ferritig a dur gwrthstaen ferritig.Ar y llaw arall, rhaid dodrefnu tiwbiau dur di-staen austenitig yn y cyflwr wedi'i drin â gwres.Fel arall, yn syth ar ôl ffurfio poeth, er nad yw tymheredd y tiwbiau yn llai na'r tymheredd toddiant isaf, gellir diffodd tiwbiau'n unigol mewn dŵr neu eu hoeri'n gyflym trwy ddulliau eraill.
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Tiwbiau Dur Di-dor JIS G3441Alloy
Pibell ddur di-dor aloi ASTM A519
Piepe dur di-dor aloi ASTM A335