1. Cov ntsiab lus ceev
1.0425yog tus qauv European (EN) tsim rau atsis yog- alloy zoo steeltshwj xeeb yog npaj rau lub hom phiaj siab. Thaum siv rau boiler kav, nws yog ib tug txhim khu kev qha, tsawg- carbon steel paub txog nws zoo zog, formability, thiab weldability ntawm nruab nrab kub. Nws yog ib qho khoom siv thiab tus nqi -kev xaiv zoo rau ntau yam kev siv siab thiab boiler.
2. Cov Khoom Siv Txheej Txheem thiab Cov Qauv
Lub npe "1.0425" los ntawm EN 10027-2 tus qauv rau cov lej hlau. Nws cov txheej txheem tseem ceeb tshaj plaws rau kev siv boiler thiab siab yogTS EN 10216-1, uas npog seamless steel raj rau lub hom phiaj siab.
Qib sib npaug hauv Lwm Cov Qauv:
| Txuj | Qib/Designation |
|---|---|
| EN | 1.0425, P235GH1, P235GH |
| DIN | HII |
| ASTM | A/SA 106 Qib B (zoo sib npaug, tab sis tsis muaj tseeb) |
| ISO | P235GH |
Nco tseg:Thaum A106 Qib B feem ntau siv sib hloov hauv ntau daim ntawv thov, muaj qhov sib txawv me ntsis hauv cov tshuaj muaj pes tsawg leeg thiab yuav tsum xeem. Nco ntsoov sab laj txog qhov project specifications.
3. Tshuaj muaj pes tsawg leeg
Cov muaj pes tsawg leeg yog tswj los xyuas kom meej weldability thiab stability ntawm siab kub. Cov kev txwv tseem ceeb yog feem ntau (raws li EN 10216-1):
| Lub ntsiab | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | max . 0.16 |
| Manganese (Mn) | 0.50 - 1.20 |
| Silicon (Si) | 0.10 - 0.35 |
| Phosphorus (P) | max . 0.025 |
| Sulfur (S) | max . 0.020 |
| Chromium (Cr) | max . 0.30 |
| Copper (Cu) | max . 0.30 |
| Molybdenum (hli) | max . 0.08 |
| Nickel (Ni) | max . 0.30 |
| Aluminium (Al) | min . 0.020 |
Key Takeaway:Cov ntsiab lus tsis tshua muaj carbon yog qhov tseem ceeb rau kev weldability zoo. Cov manganese muab lub zog thiab lub zog. Tsawg qis ntawm sulfur thiab phosphorus txhim kho toughness.
4. Mechanical Properties
Cov khoom siv kho tshuab yog dab tsi ua rau nws haum rau siab - muaj cov khoom.
| Khoom | Tus nqi |
|---|---|
| Yield zog (Rp0.2), min | 235 MPa rau |
| Tensile zog (Rm) | 360 - 510 MPa |
| Elongation (A), min | ~ 25% (nyob ntawm thickness) |
| Impact Zog (KV) | Qhia meej ntawm +20℃(feem ntau min 27 J) |
5. Cov yam ntxwv tseem ceeb & qhov zoo
Zoo Weldability:Nws qhov sib npaug ntawm cov pa roj carbon tsawg (CEV) ua rau nws yooj yim heev rau vuam siv txhua txoj hauv kev yam tsis muaj ua ntej - lossis tom qab - kho cua sov hauv feem ntau cov tuab.
High -Tsub Ua Haujlwm:Tsim los rauntev - kev pabcuam lub sijhawm ntawm qhov kub siab(txog li 300-350 degree). Nws tuav nws lub zog thiab tiv thaiv nkag tau zoo dua li cov qauv carbon steels.
Lub zog thiab Toughness:Muab qhov sib npaug zoo ntawm cov khoom muaj zog thiab ductility, ua rau nws tiv taus cov pob txha tawg.
Formability:Nws tuaj yeem khoov thiab flanged nrog cov txheeb ze yooj yim, uas yog qhov tseem ceeb rau cov kav dej.
Tus nqi -zoo:Raws li cov hlau tsis yog- alloy steel, nws muaj nqis tshaj chrome-moly lossis stainless hlau lwm txoj kev.
6. Kev siv ntau
Cov hlau no feem ntau yog siv rau hauv cov tshuab uas ua haujlwm nyob rau hauv siab thiab / lossis ntawm qhov kub siab.
Boiler Tubes:Rau qhov qis mus rau nruab nrab -siab chav boilers thiab dej kub boilers.
Superheater Tubes(hauv qis- qhov kub thiab txias).
Cov nkoj siab:Plhaub thiab headers rau muaj roj thiab kua.
Industrial Piping Systems:Rau chav dej, dej kub, thiab lwm yam txheej txheem dej.
Thaum tshav kub kub Exchangers:Tubes thiab plhaub qhov twg corrosion kuj tsis yog ib qho kev txhawj xeeb tseem ceeb.
Fais fab Generation Plants:Piping rau feedwater, chav, thiab lwm yam auxiliary systems.
7. Kev txiav txim siab tseem ceeb
Corrosion Resistance:Zoo li txhua cov pa roj carbon steel, 1.0425 yog qhov cuam tshuam rau xeb thiab oxidation. Nws yuav tsum muaj cov txheej txheem tiv thaiv (xim xim) lossis cov ntaub hauv ob sab phlu yog siv nyob rau hauv ib puag ncig corrosive lossis nqa qee yam xov xwm.
Kub txwv:Tsis txhob siv nws rau siab - daim ntawv thov kub tshaj nws qhov kev txwv (xyuas EN 10216-1 tus qauv rau qhov muaj nuj nqis raws li lub neej tsim). Rau qhov kub siab dua, alloy steels zoo li 1.7380 (P91) yog siv.
Quality Assurance:Cov kav dej xa mus rau EN 10216-1 tau txais kev kuaj tsis zoo (NDT), xws li kuaj ultrasonic lossis hydrostatic, kom ntseeg tau tias muaj kev ntseeg siab.
Xaus
1.0425 Carbon Steel Boiler Yeeb Nkabyog ib qho tseem ceeb, txhim khu kev qha, thiab siv dav siv rau cov khoom siv siab. Nws zoo heev ua ke ntawm lub zog, weldability, thiab siab - qhov kub thiab txias ua rau nws mus - xaiv rau ntau yam boiler thiab siab piping daim ntaub ntawv nyob rau hauv lub hwj chim, industrial, thiab cua sov cov nroj tsuag.
Nco ntsoov xyuas kom meej tias cov khoom yog los ntawm qhov tsim nyogdaim ntawv pov thawj zeb (3.1B lossis 3.2)los xyuas nws ua raws li cov qauv tsim nyog.
