I-347 yintsimbi engenasici equlethe i-niobium, ngelixa i-347H yinguqulelo yayo enekhabhoni ephezulu. Ngokuphathelele ukwakheka kwayo,347ingabonwa njenge-alloy ephuma ekongezeni i-niobium kwisiseko sentsimbi engagqwali engama-304. I-Niobium yinto engaqhelekanga yomhlaba esebenza ngendlela efanayo ne-titanium. Xa yongezwa kwi-alloy, inokuphucula ulwakhiwo lweenkozo, imelane nokugqwala kwe-intergranular, kwaye ikhuthaze ukuqina kobudala.
Ⅰ. Ihambelana nemigangatho yesizwe
| iTshayina | I-GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | I-ASTM A240-15a | S34700，347 | S34709，347H |
| I-JIS | J1S G 4304:2005 | I-SUS 347 | - |
| I-DIN | EN 10088-1-2005 | I-X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ. UKWAKHIWA KWE-S34700 NGEEKHEMIKIMI Ibha yentsimbi engagqwaliyo
| Ibanga | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | Ubuninzi obuyi-0.08 | 2.00ubuninzi | Ubuninzi be-1.0 | 0.030ubuninzi | Ubuninzi obuyi-0.045 | 62.74 imizuzu | 9-12ubuninzi | 17.00-19.00 |
| 347H | 0.04 – 0.10 | Ubuninzi be-2.0 | Ubuninzi be-1.0 | Ubuninzi be-0.030 | Ubuninzi obuyi-0.045 | imizuzu engama-63.72 | 9-12ubuninzi | 17:00 – 19:00 |
Ⅲ.347 347H Ibha yentsimbi engatyiwayo Iipropati zoomatshini
| Uxinano | Indawo yokunyibilika | Amandla okuThamba (MPa) min | Amandla okuvelisa 0.2% Ubungqina (MPa) min | Ubude (% kwi-50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | I-Psi – 75000 , i-MPa – 515 | I-Psi – 30000 , i-MPa – 205 | 40 |
Ⅳ. Iipropati zezinto ezibonakalayo
①Ukumelana nokugqwala okugqwesileyo okufana nentsimbi engagqwali engama-304.
② Iphakathi kwama-427 ~ 816℃, inokuthintela ukwakheka kwe-chromium carbide, imelane novakalelo, kwaye inokumelana kakuhle nokugqwala kwe-intergranular.
③Isenokumelana nokuqhekeka okuthile kwindawo enamandla okonakalisa ioksijini enobushushu obuphezulu obuyi-816℃.
④Kulula ukuyandisa nokuyila, kulula ukuyishibiliza.
⑤Ukuqina okuhle kubushushu obuphantsi.
Ⅴ. Izihlandlo zokufaka izicelo
Ukusebenza kobushushu obuphezulu347 kunye ne347Hintsimbi engatyiwayo ingcono kuneye-304 kunye ne-321. Isetyenziswa kakhulu kwiinkampani zeenqwelo-moya, iikhemikhali, ukutya, iphepha kunye nezinye izinto, ezifana nemibhobho ephambili yokukhupha umoya kunye nemibhobho yamasebe eenjini zeenqwelo-moya, imibhobho yegesi eshushu yeecompressor zeturbine, nakwimithwalo emincinci kunye namaqondo obushushu angadluli kwi-850°C. Iindawo ezisebenza phantsi kweemeko, njl.
Ixesha leposi: Meyi-11-2024