P11 Alloy Steel yog cov hlau tsis tshua muaj hlau uas muaj ntau yam khoom siv uas txhim kho nws qhov zoo. Cov ntsiab lus tseem ceeb ntawm cov khoom siv hauv P11 yog chromium, uas suav txog 1 feem pua ntawm cov hlau qhov hnyav. Chromium ntxiv rau cov hlau los txhim kho nws lub zog, hardness, thiab corrosion thiab oxidation kuj. P11 alloy steel muaj chromium, molybdenum, vanadium, thiab npib tsib xee ntxiv rau chromium. Molybdenum thiab vanadium tau ntxiv los ntxiv dag zog thiab ua kom cov hlau, thaum nickel siv los txhim kho corrosion thiab oxidation kuj.
Lub zog tensile siab ntawm P11 alloy steel tso cai rau nws dais kev ntxhov siab thiab siab tsis muaj kev cuam tshuam lossis tawg. Cov hlau lub zog yog vim muaj cov chromium, molybdenum, thiab vanadium. P11 alloy steel tuaj yeem khaws nws lub zog thiab hardness ntawm qhov kub thiab txias li 600 degree. Yog li ntawd, nws yog qhov tsim nyog rau boilers thiab lwm yam kev siv kub. Vim nws cov ntsiab lus chromium thiab npib tsib xee, P11 alloy steel muaj qhov zoo corrosion thiab oxidation kuj. Qhov no ua rau nws haum rau cov xwm txheej uas muaj corrosion thiab oxidation. Tsis tas li ntawd, P11 alloy steel yog tawv, uas txhais tau hais tias nws tuaj yeem tiv taus qhov cuam tshuam thiab lwm yam kev ntxhov siab yam tsis muaj kev tawg lossis deforming. Kev suav nrog molybdenum thiab vanadium hauv cov hlau ua rau nws muaj zog. Qhov txiaj ntsig tseem ceeb tshaj plaws ntawm P11 steel yeeb nkab yog tias nws yog 100 feem pua rov ua dua tshiab, uas ua raws li lub teb chaws txoj kev npaj rau kev tiv thaiv ib puag ncig, kev txuag hluav taws xob, thiab kev txuag nyiaj. Lub teb chaws txoj cai txhawb kev nthuav dav ntawm daim ntawv thov teb rau kev kub siab P11 steel yeeb nkab.
Txawm li cas los xij, muaj qee qhov kev txwv rau P11 alloy steel uas yuav tsum tau txiav txim siab. Nws tsis tsim nyog rau ultra-high-temperature daim ntaub ntawv thiab muaj zog corrosion thiab oxidation kuj nyob rau hauv hnyav corrosive tej yam kev mob. Tsis tas li ntawd, vim nws cov ntsiab lus carbon siab thiab nyiam tawg thaum vuam, P11 alloy hlau tsis yooj yim rau vuam.
Chemical Composition (%) ntawm ASTM A335 P11 Alloy Steel
| CHEMICAL COMPOSITION (%) | ||||||
| C | Mn | P, max | Si | Cr | Mo | |
| 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
Mechanical Properties ntawm ASTM A335 P11 AlloyHlau
| MECHANICAL PROPERTIES | ||
| Tensile zog, MPa, min | Yield zog, MPa, min | Elongation (%), min |
| 415 | 205 | 30 |
P11 alloy steel yog dav siv hauv kev lag luam tsim hluav taws xob, tshwj xeeb tshaj yog cov khoom siv kub thiab kub siab xws li boilers. Qee qhov kev siv ntau tshaj plaws rau P11 alloy steel muaj xws li:
- Boiler tubes: P11 alloy steel feem ntau siv los tsim cov raj boiler, uas thauj cov roj kub thiab cov kua dej los ntawm boiler mus rau lub turbine. P11 alloy steel yog qhov kev xaiv zoo tshaj plaws rau cov raj no vim tias nws tuaj yeem ua haujlwm kub thiab siab tsis muaj deforming lossis tawg.
- Superheater tubes: P11 alloy steel kuj tseem siv los ua cov raj superheater, uas superheat chav ua ntej nws nkag mus rau hauv lub turbine. Superheater tubes yuav tsum muaj peev xwm tiv taus qhov kub siab tshaj li cov boiler.
- Thaum tshav kub kub exchangers: P11 alloy steel yog siv nyob rau hauv zus tau tej cov tshav kub exchangers rau ntau yam kev lag luam daim ntaub ntawv. P11 alloy steel yog qhov kev xaiv zoo tshaj plaws rau cov khoom siv hluav taws xob sib txawv, uas yog siv los hloov cov cua sov ntawm ob lub kua dej thiab yuav tsum tiv taus qhov kub thiab txias.
- Fais fab nroj tsuag piping: Vim nws qhov kub thiab txias tsis kam, P11 alloy steel yog nquag siv hauv cov kav dej fais fab. Cov kav dej uas siv los hloov cov chav thiab lwm cov kua dej thoob plaws hauv lub tshuab hluav taws xob yuav tsum tiv taus qhov kub thiab txias yam tsis muaj tawg lossis tawg.
- Cov hlab ntsha siab: P11 alloy steel kuj tseem ua haujlwm hauv kev tsim cov hlab ntsha siab rau ntau yam kev lag luam. P11 alloy steel yog qhov kev xaiv zoo tshaj plaws rau cov hlab ntsha siab, uas yog cov thawv ntim cov kua dej hauv qhov siab thiab yuav tsum muaj peev xwm dais siab yam tsis muaj kev tawg.
- Turbine Cheebtsam: P11 alloy steel kuj tseem siv los ua cov khoom siv turbine xws li cov hniav, casings, thiab rotors. P11 alloy steel yog qhov kev xaiv zoo tshaj plaws rau cov khoom no vim nws tuaj yeem tiv taus qhov kub thiab txias.
TS tuaj yeem muab ASTM A335 P11 seamless alloy steel kav hauv ntau qhov ntev, thiab peb cov kav dej tuaj yeem tsim kho kom tau raws li qhov xav tau ntawm cov neeg siv khoom. Peb tseem tuaj yeem muab ASTM A335 P5 seamless alloy steel kav, ASTM A335 P11 finned tubes, ASTM A335 P9 finned hlab, thiab lwm yam ASTM A335 P5 seamless alloy steel kav.
ASTM A335 P11 Alloy Steel Yeeb Nkab
Vim tias lawv cov txuj ci tsim khoom sib txawv, ASTM A335 P11 seamless steel kav tau muab faib ua ob hom: kub dov (extruded) seamless steel kav thiab txias-draw (dov) seamless steel kav. Cold-drawn (dov) raj yog cais raws li cov raj puag ncig lossis cov raj tshwj xeeb.
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