Awọn ibeere Iṣọkan Kemikali ，%
C: ≤0.30
Mn: 0.29-1.06
P: ≤0.025
S: ≤0.025
Si: ≥0.10
Ni: ≤0.40
K: ≤0.30
Kú: ≤0.40
V: ≤0.08
Nb: ≤0.02
Mo: ≤0.12
* Akoonu manganese le pọ si nipasẹ 0.05% fun idinku 0.01% kọọkan ninu akoonu erogba to 1.35%.
** Akoonu Niobium, ti o da lori adehun, le pọ si 0.05% fun itupalẹ yo ati 0.06% fun itupalẹ ọja ti pari.
Awọn ibeere itọju ooru:
1. Normalize loke 815 ° C.
2. Normalize loke 815 ° C, lẹhinna ibinu.
3. Gbona ti a ṣẹda laarin 845 ati 945 ° C, lẹhinna tutu ni ileru loke 845 ° C (fun awọn tubes ti ko ni iyasọtọ nikan).
4. Machined ati ki o si tempered bi fun loke Point 3.
5. O le ati lẹhinna tempered loke 815°C.
Awọn ibeere iṣẹ ṣiṣe ẹrọ:
Agbara ikore: ≥240Mpa
Agbara fifẹ: ≥415Mpa
Ilọsiwaju:
| Apeere | A333 GR.6 | |
| Inaro | Yipada | |
| Kere iye ti a boṣewa ipinapẹrẹ tabi apẹrẹ iwọn kekere kan pẹlu ijinna isamisi ti 4D | 22 | 12 |
| Awọn apẹẹrẹ onigun mẹrin pẹlu awọn sisanra ogiri ti 5/16 in. (7.94 mm) ati pupọ julọ, ati gbogbo awọn apẹẹrẹ iwọn kekere ni idanwo niAbala agbelebu ni kikun ni 2 in. (50 mm)awọn isamisi | 30 | 16.5 |
| Awọn apẹẹrẹ onigun to 5/16 in. (7.94 mm) sisanra ogiri ni 2 in. (50 mm) ijinna isamisi (iwọn apẹrẹ 1/2 in., 12.7 mm) | A | A |
Gba laaye idinku 1.5% ni gigun gigun ati idinku 1.0% ni elongation transverse fun kọọkan 1/32 in. (0.79 mm) ti sisanra ogiri titi de 5/16 in. (7.94 mm) lati awọn iye elongation ti a ṣe akojọ loke.
Idanwo Ipa
Igbeyewo otutu: -45°C
Nigbati a ba lo awọn apẹẹrẹ ipa kekere Charpy ati iwọn ogbontarigi apẹrẹ jẹ kere ju 80% ti sisanra gangan ti ohun elo, iwọn otutu idanwo ipa kekere yẹ ki o lo bi iṣiro ni Tabili 6 ti ASTM A333 sipesifikesonu.
| Apeere, mm | Iwọn ti o kere ju ti awọn ayẹwo mẹta | Kere iye ti lorie of awọn apẹẹrẹ mẹta |
| 10 × 10 | 18 | 14 |
| 10 × 7.5 | 14 | 11 |
| 10 × 6.67 | 12 | 9 |
| 10 × 5 | 9 | 7 |
| 10 × 3.33 | 7 | 4 |
| 10 × 2.5 | 5 | 4 |
Awọn paipu irin yẹ ki o jẹ hydrostatically tabi ti kii ṣe idanwo iparun (eddy lọwọlọwọ tabi ultrasonic) lori ipilẹ ẹka-nipasẹ-ipilẹ.
Ifarada ti iwọn ila opin ita ti paipu irin:
| Ita Opin, mm | ifarada rere,mm | ifarada odi,mm |
| 10.3-48.3 | 0.4 | 0.4 |
| 48.3.D≤114.3 | 0.8 | 0.8 |
| 114.3.D≤219.10 | 1.6 | 0.8 |
| 219.1.D≤457.2 | 2.4 | 0.8 |
| 457.2.D≤660 | 3.2 | 0.8 |
| 660.D≤864 | 4.0 | 0.8 |
| 864.D≤1219 | 4.8 | 0.8 |
Ifarada sisanra ogiri ti paipu irin:
Ojuami eyikeyi kii yoo kere ju 12.5% ti sisanra odi ipin.Ti sisanra ogiri ti o kere ju ti paṣẹ, ko si aaye ti yoo kere ju sisanra ogiri ti a beere.
Akoko ifiweranṣẹ: Kínní-22-2024