Xaiv qhov zoo tshaj plaws stainless hlau alloys rau peev cam khwb cia Cheebtsam nyob rau hauv corrosive ib puag ncig yuav tsum tau ceev faj soj ntsuam ntawm txhua yam khoom, corrosion kuj, thiab manufacturability. Qhov kev tshuaj ntsuam xyuas no piv rau 316L austenitic thiab 17-4PH nag lossis daus- ua kom cov hlau tsis muaj zog, muab cov ntaub ntawv-tsav kev nkag siab rau cov kws tsim qauv qhia cov khoom siv rau kev ua tshuaj lom neeg, dej hiav txwv, thiab roj / roj.
Metallurgical yam ntxwv
316L Stainless hlau
● Muaj pes tsawg leeg: 16-18% Cr, 10-14% Ni, 2-3% Mo,<0.03% C
● Crystal Structure: Austenitic (FCC)
● Raws li - Cast Condition:
Tawm Zog: 170-210 MPa
UTS: 480-520 MPa
Elongation: 40-50%
17-4PH Stainless hlau
● Muaj pes tsawg leeg: 15-17.5% Cr, 3-5% Ni, 3-5% Cu, 0.3-0.5% Nb
● Crystal Structure: Martensitic (BCT) tom qab kev kho cua sov
● H900 Cov Txheej Txheem:
Tawm Zog: 1100-1300 MPa
UTS: 1240-1380 MPa
Elongation: 10-15%
Corrosion Performance
| Ib puag ncig | 316L kev ua haujlwm | 17-4PH Performance UAS |
|---|---|---|
| 3.5% NaCl ntsev Fog | Tsis muaj pitting (1000h) | Qhov loj me (500h) |
| 10% H2SO4 @ 50 degree | <0.1 mm/yr | 0.5-1.2 hli / xyoo |
| Chlorinated Dej | Zoo heev | Muaj kev pheej hmoo SCC |
| H2S Sour Service | NACE MR0175 ua raws | Txwv rau 50 degree |
Kev nqis peev Casting kev txiav txim siab
316L Qhov Zoo
● Superior weldability (tsis muaj ua ntej / tom qab-kev kho cua sov)
● Kev sib tsoo qis dua thaum lub sij hawm khov
● Kev tiv thaiv corrosion tsis zoo nyob rau hauv raws li -cast condition
17-4PH Qhov Zoo
● 3X siab zog tom qab kev laus (H900: 482℃/ 1hr)
● Zoo hnav tsis kam (HRC 40 vs. HRC 22 rau 316L)
● Dimension stability thaum lub sij hawm kho cua sov
Kev Ntsuas Tus Nqi
● Cov Nqi Khoom: 17-4PH (20-25% premium tshaj 316L)
● Tus Nqi Ua Haujlwm: 316L xav tau NDT tsawg dua rau cov ntawv thov tseem ceeb
● Cov Nqi Them Nqi: 316L feem ntau nyiam rau kev pabcuam corrosion hnyav
Kev lag luam-Cov lus qhia tshwj xeeb
Xaiv 316L Thaum:
● Kev ua haujlwm hauv chloride-ib puag ncig nplua nuj
● Yuav tsum tau txias - ua los yog vuam muaj peev xwm
● Xav tau FDA-cov ntaub ntawv ua raws li cov khoom noj/kev kho mob
Xaiv 17-4PH Thaum:
● Lub zog siab - rau - qhov hnyav piv yog qhov tseem ceeb
● Cheebtsam yuav tsum tau machining kom nruj tolerances
● Nruab nrab corrosion nrog txhua yam kev ntxhov siab tam sim no
Thaum 316L qhia tau hais tias zoo dua corrosion kuj, 17-4PH muaj cov khoom tshwj xeeb thaum kho cua sov kom zoo. Advanced foundries tam sim no muab cov kev daws teeb meem hybrid - siv 316L rau corrosion-nruas nto nrog 17-4PH structural ntsiab nyob rau hauv bi-material castings. Kev ntsuas kev ua tau zoo hauv cov kev pabcuam tiag tiag tseem yog qhov tseem ceeb rau kev xaiv cov khoom kawg.
