I-347 i-niobium-equkethe i-austenitic stainless steel, ngelixa i-347H iyinguqulo yayo ephezulu yekhabhoni. Ngokumalunga nokwakheka,347inokubonwa njenge-alloy ephuma ekongezeni i-niobium kwisiseko se-304 yensimbi engenasici. I-Niobium yinto enqabileyo yomhlaba esebenza ngokufanayo ne-titanium. Xa ifakwe kwi-alloy, inokuphucula ukwakheka kweenkozo, ukuxhathisa ukubola kwe-intergranular, kunye nokukhuthaza ukuqina kweminyaka.
Ⅰ.Ngokuhambelana nemigangatho yesizwe
| eTshayina | GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | I-ASTM A240-15a | S34700,347 | S34709,347H |
| I-JIS | J1S G 4304:2005 | SUS 347 | - |
| I-DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ.UKUQHUBEKA KWEKHEMICAL YE-S34700 Ibha yensimbi engenasici
| IBanga | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 ubuninzi | 2.00 max | 1.0 ubuninzi | 0.030ubuninzi | 0.045 ubuninzi | 62.74 min | 9-12 ubuninzi | 17.00-19.00 |
| 347H | 0.04 - 0.10 | 2.0 ubuninzi | 1.0 ubuninzi | 0.030 ubuninzi | 0.045 ubuninzi | 63.72 min | 9-12 ubuninzi | 17.00 - 19.00 |
Ⅲ.347 347H Ibha yentsimbi engatyiwayo yeePropati zooMatshini
| Ukuxinana | Indawo yokunyibilika | Amandla e-Tensile (MPa) min | Amandla eSivuno 0.2% Ubungqina (MPa) min | Ubude (% kwi-50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ.Iipropati zezinto eziphathekayo
①Ukumelana nokugqwesa kokugqwesa kuthelekiswa nentsimbi engama-304.
② Phakathi kwe-427 ~ 816℃, inokuthintela ukubunjwa kwe-chromium carbide, ukuxhathisa ukuvuselela, kunye nokuchasana okulungileyo kwi-corrosion ye-intergranular.
③Isenoxhathiso oluthile lokurhubuluza kwindawo eyomeleleyo ene-oxidizing enobushushu obuphezulu be-816℃.
④Kulula ukwandisa kunye nokwenza, kulula ukuwelda.
⑤Ukuqina okuhle kobushushu obuphantsi.
Ⅴ.Izihlandlo zokufaka izicelo
Ukusebenza kobushushu obuphezulu be347&347Hinsimbi engenasici ingcono kunaleyo ye-304 kunye ne-321. Isetyenziswa ngokubanzi kwinqwelomoya, i-petrochemical, ukutya, iphepha kunye namanye amashishini, njengemibhobho ephumayo engundoqo kunye nemibhobho yesebe yeenjini zeenqwelo-moya, imibhobho yegesi eshushu yee-compressors ze-turbine, kunye nemithwalo emincinci. kunye namaqondo obushushu angekho ngaphezulu kwama-850°C. Amacandelo asebenza phantsi kweemeko, njl.
Ixesha lokuposa: May-11-2024