1. Tensile thiab paib lub zog
Lub sijhawm luv luv (0-10 xyoo): Kev txo qis tsawg; Lub Patina ruaj duab Patina txheej qeeb ntxiv kev xeb ntxiv, khaws cov tub ntxhais lub zog.
Lub sijhawm ntev (10+ xyoo):
Nyob rau hauv cov chaw me: Lub zog tseem nyob hauv ~ 90-95% ntawm cov nuj nqis qub (ib antm A423).
Nyob rau hauv ib puag ncig ib puag ncig(Nqos / lag luam): pittingized nyob rau hauv ib cheeb tsam yuav txo qis-seem zoo, txo peev muaj peev xwm los txog li 10-15%.
2. Toughness thiab Cuam Tshuam
Tsawg-qhov kub ua tau zoo:
Tsis muajHauv cov huab cua qhuav, huab cua sov.
Khiav dimNyob rau hauv qhov chaw txias, ntub dej ib puag ncig vim yog hydrogen embrittlement (los ntawm cyclic ntub / qhuav raug). Charpy V-Notch tseem ceeb yuav poob 20-30% hauv qab -20℃(-4℃f).
Qaug zog lub neej:
Corrosion-Quab zog tawg tuaj yeem pib ntawm qhov chaw nres, txo cyclic load muaj peev xwm los ntawm 15-25% nyob rau hauv ntsev-nraaj cua (ib qho antm g44 kev sim).
3. Ductility (Elongation)
Kev sib xyaw corrosion: Elongation tseem ruaj khov (ntau dua lossis sib npaug rau 15-18% hauv 50 hli).
Pitting / kev ntxhov siab ntau: Permentized thinning tuaj yeem txo kev sib deev ze rau pits lossis Welds.
4. Hardness
Nplaim: Nce me ntsis (txog li 10% siab dua HRB) vim oxide txheej tsim.
Lub hlwb: Tsis hloov tshwj tsis yog raug rau kev caij tsheb kauj vab thermal.
Qhov tseem ceeb cuam tshuam muaj feem cuam tshuam degradation
| Yam tseem ceeb | Cuam tshuam rau ntawm cov khoom siv mechanical | Kev ntsuas kev ntsuas ntsuas |
|---|---|---|
| Patina stability | Ruaj khov Patina khaws cov khoom; flaking accelerates poob. | Ua kom ntseeg tau cov dej ntws / qhov cua. |
| Chloride kis | Pitting txo qis zog. | Yaug cov ntsev tso nyiaj; Zam kev siv marrine. |
| CcL Fading | Qaug zog tawg pib ntawm cov chaw hauv cheeb tsam. | Tsim nrog txo qis kev ntxhov siab margins nyob rau hauv cov cheeb tsam corrosive. |
| Tig viav vias | Thermal nthuav tawm / Convion yuav ua rau Welds tsis muaj zog dhau sijhawm. | Siv cov tub lim cov hlau uas tau tshaj (AWS E7018-W). |
Txij Nkawm Lus Taw Qhia
1. Kev soj ntsuam:
Cov tshev txhua xyoo rau pitting, tawg, los yog patina spalling (siv kev kuaj ultrasonic rau cov qauv tseem ceeb).
2. Kho:
Grind / thaj pits thaum ntxov; Weld tawg nrog cov hluav taws xob qis-hydrogen.
3. Cov tsho tiv no (yog tias xav tau):
Ua ntaub ntawvZinc-nplua nujTsuas yog rau cov chaw ntxhov siab siab (piv txwv li, weld pob qij txha) kom tsis txhob cuam tshuam patina.
