347 jẹ irin alagbara austenitic ti o ni niobium, lakoko ti 347H jẹ ẹya erogba giga rẹ. Ni awọn ofin ti akopọ,347ni a le rii bi alloy ti o wa lati fifi niobium kun si ipilẹ ti irin alagbara 304. Niobium jẹ ohun elo ilẹ ti o ṣọwọn ti o ṣiṣẹ bakanna si titanium. Nigbati a ba fi kun si alloy, o le ṣe atunṣe eto ọkà, koju ipata intergranular, ati igbelaruge lile ọjọ ori.
Ⅰ.Ni ibamu si awọn ajohunše orilẹ-ede
China | GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
US | ASTM A240-15a | S34700,347 | S34709, 347H |
JIS | J1S G 4304:2005 | SUS 347 | - |
DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ.KẸMICAL COMPOSITION OF S34700 Irin alagbara, irin bar
Ipele | C | Mn | Si | S | P | Fe | Ni | Cr |
347 | ti o pọju 0.08 | 2.00 ti o pọju | 1.0 ti o pọju | 0.030 ti o pọju | ti o pọju 0.045 | 62.74 iṣẹju | 9-12 ti o pọju | 17.00-19.00 |
347H | 0.04 – 0.10 | 2.0 ti o pọju | 1.0 ti o pọju | ti o pọju 0.030 | ti o pọju 0.045 | 63.72 iṣẹju | 9-12 ti o pọju | 17.00 - 19.00 |
Ⅲ.347 347H Irin alagbara, irin bar Mechanical Properties
iwuwo | Ojuami Iyo | Agbara Fifẹ (MPa) min | Agbara Ikore 0.2% Ẹri (MPa) min | Ilọsiwaju (% ni 50mm) min |
8.0 g / cm3 | 1454°C (2650°F) | Psi – 75000, MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ.Ohun elo
① O tayọ ipata resistance afiwera si 304 irin alagbara, irin.
Laarin 427 ~ 816 ℃, o le dojuti dida ti chromium carbide, koju ifamọ, ati pe o ni resistance to dara si ibajẹ intergranular.
③O tun ni resistance ti nrakò kan ni agbegbe oxidizing to lagbara pẹlu iwọn otutu giga ti 816℃.
④ Rọrun lati fa ati dagba, rọrun lati weld.
⑤ O dara kekere otutu toughness.
Ⅴ.Awọn iṣẹlẹ ohun elo
Awọn ga-otutu išẹ ti347&347Hirin alagbara, irin ni o dara ju ti 304 ati 321. O ti wa ni o gbajumo ni lilo ninu ofurufu, petrochemical, ounje, iwe ati awọn miiran ise, gẹgẹ bi awọn eefi akọkọ pipes ati eka pipes ti ofurufu enjini, gbona gaasi pipes ti turbine compressors, ati ni kekere èyà. ati iwọn otutu ko kọja 850 ° C. Awọn ẹya ti o ṣiṣẹ labẹ awọn ipo, ati be be lo.
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Akoko ifiweranṣẹ: Oṣu Karun-11-2024