347 bụ igwe anaghị agba nchara austenitic nwere niobium, ebe 347H bụ ụdị carbon ya dị elu. N'ihe gbasara nhazi,347enwere ike ịhụ dị ka alloy sitere na ịgbakwunye niobium na isi nke 304 igwe anaghị agba nchara. Niobium bụ ihe dị ụkọ n'ụwa nke na-arụ ọrụ yiri nke titanium. Mgbe etinyere ya na alloy, ọ nwere ike nụchaa nhazi ọka, guzogide corrosion intergranular, ma kwalite ike afọ.
Ⅰ.Dakọtara na ụkpụrụ mba
| 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.Mkpụrụkpụ kemịkalụ nke S34700 igwe anaghị agba nchara
| Ọkwa | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 kacha | 2.00 kacha | 1.0 kacha | 0.030 kacha | 0.045 kacha | 62.74 min | 9-12 kacha | 17.00-19.00 |
| 347H | 0.04 - 0.10 | 2.0 kacha | 1.0 kacha | 0.030 kacha | 0.045 kacha | 63.72 min | 9-12 kacha | 17.00 - 19.00 |
Ⅲ.347 347H igwe anaghị agba nchara ihe eji arụ ọrụ
| Njupụta | Ebe mgbaze | Ike Tensile (MPa) min | Mpụta Ike 0.2% Ihe akaebe (MPa) min | Mgbatị (% na 50mm) min |
| 8.0 g/cm3 | 1454 Celsius (2650 Celsius) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ.Ihe onwunwe
① Nguzogide corrosion magburu onwe ya tụnyere 304 igwe anaghị agba nchara.
② N'etiti 427 ~ 816 ℃, ọ nwere ike igbochi guzobe chromium carbide, guzogide mmetụta uche, ma nwee ezigbo nguzogide corrosion intergranular.
③Ọ ka nwere ụfọdụ creep eguzogide na a siri ike oxidizing gburugburu ebe obibi na a elu okpomọkụ nke 816 ℃.
④ Dị mfe ịgbatị na imepụta, dị mfe weld.
⑤ Ezi obere okpomọkụ siri ike.
Ⅴ.Oge ngwa
The elu-okpomọkụ arụmọrụ nke347&347Higwe anaghị agba nchara dị mma karịa nke 304 na 321. A na-eji ya n'ọtụtụ ebe na ụgbọ elu, petrochemical, nri, akwụkwọ na ụlọ ọrụ ndị ọzọ, dị ka iyuzucha isi ọkpọkọ na alaka ọkpọkọ nke engines ụgbọ elu, ọkụ gas ọkpọkọ nke turbine compressors, na obere ibu. na okpomọkụ adịghị agafe 850 Celsius. Akụkụ ndị na-arụ ọrụ n'okpuru ọnọdụ, wdg.
Oge nzipu: Mee-11-2024