Txheej txheem cej luam
13CrMo4-5 yog alow- alloy tshav kub-resistant steeltsim tshwj xeeb rau kev ua haujlwm siab - kub. Lub "13," "Cr," thiab "Mo" hauv nws lub npe qhia txog nws cov tshuaj muaj pes tsawg leeg: txog0.13% carbon, Chromium, thiabMolybdenum. Nws yog cov khoom siv dav siv hauv kev tsim hluav taws xob, petrochemical, thiab boiler manufacturing industries vim nws zoo heev ua ke ntawm lub zog, weldability, thiab tsis kam mus rau oxidation thiab creep ntawm siab kub.
1. Tshuaj muaj pes tsawg leeg
Kev sib xyaw ua ke yog tswj hwm nruj los ntawm cov qauv thoob ntiaj teb (xws li EN 10216-2). Ib qho piv txwv yog:
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.08 - 0.18 |
| Silicon (Si) | Tsawg dua los yog sib npaug li 0.35 |
| Manganese (Mn) | 0.40 - 1.00 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.010 |
| Chromium (Cr) | 0.70 - 1.15 |
| Molybdenum (hli) | 0.40 - 0.60 |
Vim li cas cov ntsiab lus no?
Chromium (Cr):Txhim kho kev tiv thaiv oxidation (scaling) thiab corrosion, tshwj xeeb tshaj yog los ntawm chav.
Molybdenum (Molybdenum):Qhov tseem ceeb nce lub zog ntawm qhov kub thiab txias thiab txhim kho kev tiv thaivnkag(qhov qeeb, mus tas li deformation nyob rau hauv qhov kev ntxhov siab tas li ntawm qhov kub thiab txias).
2. Mechanical Properties
Cov khoom tau lees paub rau cov kav dej hauv qhov normalized (+ N) lossis normalized thiab tempered (+ NT) mob.
| Khoom | Tus nqi (ntawm chav tsev kub) |
|---|---|
| Yield zog (Rp0.2) | Min . 280 MPa / 40,600 psi |
| Tensile zog (Rm) | 440 - 590 MPa / 63, 800 - 85, 600 psi |
| Elongation (A) | Tsawg kawg . 22% |
Qhov tseem ceeb siab -Tsuas Khoom: Creep Strength
Qhov no yog cov cuab yeej tseem ceeb tshaj plaws rau cov kav dej boiler . 13CrMo4-5 khaws lub zog zoo nyob rau lub sijhawm ntev ntawm qhov kub thiab txias feem ntau mus txog550-580℃(1022-1076℃F). Nws qhov siab tshaj plaws qhov kev pab cuam qhov kub thiab txias feem ntau suav hais tias yog nyob ib puag ncig560℃(1040℃F).
3. Cov ntawv thov tseem ceeb
13CrMo4-5 cov kav dej yog siv rau hauv cov tshuab siab uas cov khoom raug cuam tshuam rau qhov kub thiab txias. Cov ntawv thov uas muaj xws li:
Superheaters thiab Reheaters:Cov raj uas nqa cov ncu ntawm qhov kub thiab txias siab tshaj plaws hauv lub boiler.
Steam Headers thiab Main Steam Lines:Loj - txoj kab uas hla cov kav dej uas sau thiab thauj cov pa ntawm lub boiler mus rau lub turbine.
Thaum tshav kub kub Exchangers thiab Pressure Vesselshauv kev lag luam petrochemical.
High -Tub Pipinghauv cov chaw tsim hluav taws xob thiab cov txheej txheem kev lag luam.
4. Cov qauv tsim nyog thiab qib sib npaug
13CrMo4-5 feem ntau yog cov khoom siv hauv European (EN), tab sis nws muaj qhov sib npaug ncaj qha hauv lwm cov qauv loj.
| Txuj | Qib sib npaug | Similar / Sib piv Qib |
|---|---|---|
| TS EN 10216-2 | 13CrMo4-5 | - |
| ASTM/ASME | A335 P12 | Qhov sib npaug ze tshaj plaws, txawm tias muaj pes tsawg leeg sib txawv me ntsis. |
| DIN | 13 CrMo4-4 | Tus thawj, zoo sib xws. |
| TS EN ISO 9327-2 | 12CrMo4-5 | Qhov tseem ceeb tib yam. |
| GOST | 12 KHW | Ib tug zoo xws li Lavxias teb sab qib. |
Nco tseg:Txawm hais tias cov qib no zoo sib xws, lawv tsis yog ib txwm hloov pauv. Kev xaiv cov khoom siv yuav tsum yog raws li qhov project tshwj xeeb txoj cai tswj hwm thiab tsim cov cai.
5. Fabrication thiab Vuam
Weldability:13CrMo4-5 feem ntau suav hais tias muajzoo weldability.
Preheating:Preheating yogxav tauua ntej vuam. Ib tug raug ntau yam yog150-250 ° F (302-482 ° F), nyob ntawm phab ntsa thickness.
Tshaj tawm -Weld Heat Treatment (PWHT): Yuav tsum tau. Tom qab vuam, kev kho cua sov yog qhov tsim nyog los kho cov microstructure, txo cov kev ntxhov siab uas seem, thiab tswj cov khoom nkag mus. Qhov no feem ntau yog ua ntawm qhov kub thiab txias nruab nrab ntawm580-680℃(1076-1256℃F).
Filler Hlau:Vuam yuav tsum tau ua nrog cov hlau sib xws lossis sib xws, xws li ER80S-B2 lossis E8018-B2 raws li AWS cov qauv.
6. Qhov zoo thiab qhov txwv
Qhov zoo:
Zoo heev creep zog thiab ntev - lub sij hawm durability ntawm kub kub.
Zoo tiv thaiv oxidation thiab scaling.
Zoo weldability nrog cov txheej txheem tsim nyog.
Zoo toughness thiab ductility.
Kev txwv:
Tsis yog stainless hlau:Nws muaj kev txwv tsis pub corrosion nyob rau hauv ib puag ncig hnyav (xws li chlorides, acidic tej yam kev mob).
Muaj qhov siab tshaj plaws qab nthab (~ 560 degree) tshaj qhov siab dua -qib alloys (xws li 10CrMo9-10 lossis P91) yuav tsum tau.
Yuav tsum muaj kev tswj xyuas nruj ntawm cov txheej txheem vuam thiab kev kho cua sov.
Cov ntsiab lus
13CrMo4-5yog ib tug neeg ua haujlwmqis- hlau alloyrau siab - kub, siab - kev siv siab, tshwj xeeb tshaj yog nyob rau hauv boilers thiab fais fab nroj tsuag. Nws qhov sib npaug ntawm cov chromium thiab molybdenum muab tus nqi zoo tshaj - rau - kev ua tau zoo piv rau cov kev pabcuam txog li 560 degree, ua rau nws muaj kev ntseeg siab thiab dav cov khoom siv rau cov khoom siv tseem ceeb - nqa cov khoom.
Tsis lees paub:Cov ntaub ntawv muab ntawm no yog siv rau kev siv dav dav thiab kev kawm. Rau kev tsim, kev yuav khoom, lossis kev tsim khoom, ib txwm sab laj txog qhov cuam tshuam, nce - mus rau - cov qauv ntaub ntawv (EN 10216-2, ASME BPVC, thiab lwm yam) thiab cov lus qhia ntawm cov khoom tsim nyog engineers.
