Txheej txheem cej luam
13CrMo44 yog atshav kub-tiv taus, qis- hlau alloyFeem ntau siv rau nws cov khoom siv kho tshuab zoo heev ntawm qhov kub siab. Nws poob raws li European tus qauvTS EN 10216-2, uas qhia txog cov kev cai rau seamless steel raj rau lub hom phiaj siab.
Lub npe "13CrMo44" yog muab los ntawm nws cov tshuaj muaj pes tsawg leeg:
13= Kwv yees li 1% Chromium (Cr)
CrMo= Cov ntsiab lus tseem ceeb alloying yog Chromium thiab Molybdenum (Mo)
44= Tus lej ntawm cov khoom siv tshwj xeeb hauv tus qauv.
1. Cov ntsiab lus tseem ceeb thiab cov qauv
13CrMo44 cov kav dej yog tswj hwm los ntawm ntau tus qauv thoob ntiaj teb, uas ua kom muaj kev sib luag thiab zoo rau kev siv siab.
European Standard: TS EN 10216-2- Seamless raj rau lub hom phiaj siab - Kev xa khoom xa tuaj rau cov khoom tsis yog- alloy thiab alloy steel hlab nrog cov khoom ntsuas kub siab.
Qhov sib npaug German Standard (DIN): TIAB SA 17175- Cov raj rau qhov kub siab.
Sib npaug US Standard (ASTM / ASME): A335 P12yog qhov sib npaug ze tshaj plaws, txawm tias muaj kev hloov pauv me ntsis hauv cov tshuaj muaj pes tsawg leeg txwv.
Lwm yam sib npaug:Nws kuj zoo ib yam liT/P12thiab15 CrMonyob rau hauv ib co Suav qauv.
2. Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg (los ntawm qhov hnyav%) raws li EN 10216-2 yog:
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Cov pa roj carbon (C) | 0.10 - 0.17 |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.35 |
| Manganese (Mn) | 0.40 - 0.70 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 |
| Sulfur (S) | Tsawg dua los yog sib npaug rau 0.020 |
| Chromium (Cr) | 0.70 - 1.00 |
| Molybdenum (hli) | 0.40 - 0.55 |
Vim li cas cov ntsiab lus tseem ceeb:
Chromium (Cr):Txhim kho oxidation (scaling) tsis kam thiab muab kev txhim kho lub zog ntawm qhov kub thiab txias.
Molybdenum (Molybdenum):Ua kom muaj zog thiab nkag siab tsis kam (ua haujlwm rau deformation nyob rau hauv lub sijhawm ntev - kev ntxhov siab ntawm qhov kub siab).
3. Mechanical Properties
Cov khoom siv kho tshuab tau teev tseg rau qhov normalized thiab tempered mob.
| Khoom | Tus nqi |
|---|---|
| Yield zog (Rp0.2), min | 280 MPa |
| Tensile zog (Rm) | 440 - 590 MPa |
| Elongation (A), min | 22% |
Hardness:Feem ntau nyob ib ncig ntawm 130 - 180 HB (Brinell Hardness).
4. Cov yam ntxwv tseem ceeb thiab qhov zoo
Zoo heev High -Temperature Strength:Khaws nws lub zog txhua yam ntawm qhov kub txog li ~ 550-600 degree, ua rau nws zoo tagnrho rau cov chaw tsim hluav taws xob thiab cov txheej txheem kev lag luam.
Zoo Creep Resistance:Muaj peev xwm tiv taus qhov kev ntxhov siab nyob rau lub sijhawm ntev yam tsis muaj qhov cuam tshuam loj heev.
Zoo Weldability:Nws tuaj yeem welded siv ntau txoj hauv kev, txawm hais tias ua ntej- cua sov thiab tom qab- vuam kev kho cua sov (PWHT) feem ntau yuav tsum tau tiv thaiv kev tawg thiab kho cov microstructure hauv tshav kub- thaj chaw cuam tshuam (HAZ).
Resistance rau Hydrogen Attack:Cov ntsiab lus Molybdenum muab kev tiv thaiv zoo rau hydrogen embrittlement ntawm qhov kub siab, uas yog qhov tseem ceeb hauv kev siv petrochemical.
Zoo Oxidation Resistance:Cov ntsiab lus Chromium tsim cov txheej txheem oxide tiv thaiv, txo qhov ntsuas kub ntawm qhov kub.
5. Kev siv ntau
13CrMo44 cov kav dej feem ntau yog siv rau hauv cov tshuab ua haujlwm nyob rau hauv siab thiab kub. Cov ntawv thov ib txwm muaj xws li:
Kev tsim hluav taws xob:Superheater thiab reheater tubes, chav headers, thiab cov kab tseem ceeb hauv cov nroj tsuag fossil roj fais fab.
Petrochemical Kev Lag Luam:Cov kav dej hauv refineries thiab cov nroj tsuag tshuaj rau kev thauj cov txheej txheem cov kua dej ntawm qhov kub thiab txias (xws li, hauv catalytic crackers thiab hydrocrackers).
Boiler Systems:Rau ntau yam boiler Cheebtsam xws li nruas thiab txuas cov kav dej.
Thaum tshav kub kub Exchangers:Hauv cov plhaub thiab cov raj uas muaj kev ua haujlwm muaj kev kub ntxhov thiab siab.
6. Fabrication thiab Vuam
Ua ntej- cua sov:Qhov tseem ceeb ua ntej welding kom qeeb qhov txias txias thiab tiv thaiv kev tsim cov tawv, tawg -rhiab martensitic qauv hauv thaj tsam weld. Ib txwm ua ntej- kub kub yog 150-250℃.
Tshaj tawm -Weld Heat Treatment (PWHT): Yuav tsum taurau 13cr44. PWHT (kev txhawb nqa kev ntxhov siab) yog ua nyob rau ntawm qhov kub ntawm 650-700℃mus rau:
Relieve residual stresses los ntawm vuam.
Temper lub HAZ, txhim kho toughness.
Xyuas kom muaj qhov ruaj khov microstructure rau siab -kev pabcuam kub.
Welding Consumables:Electrodes thiab muab tub lim xov hlau nrog cov tshuaj sib xyaw ua ke (xws li E8018-B2 rau SMAW, ER80S-B2 rau GTAW/GMAW) yuav tsum tau siv.
Cov ntsiab lus
| Feature | Kev piav qhia |
|---|---|
| Hom khoom | Thaum tshav kub kub-tiv taus, qis- hlau alloy |
| Ntsiab Alloys | Chromium (Cr) ~ 1%, Molybdenum (Mo) ~ 0.5% |
| Thawj Standard | TS EN 10216-2 |
| Main Advantage | Siab zog thiab creep tsis kam ntawm siab kub |
| Kev siv yam | Fais fab nroj tsuag kav, petrochemical reactors, siab - siab boilers |
| Txheej txheem tseem ceeb | Yuav tsum tau ua tib zoo vuam nrog ua ntej- cua sov thiab PWHT |
Hauv kev xaus,13CrMo44 yog cov khoom siv ua haujlwm rau siab - kub, siab - kev siv siab. Nws qhov sib npaug ntawm cov chromium thiab molybdenum ua rau nws txhim khu kev qha thiab tus nqi -kev xaiv zoo rau cov kav dej tseem ceeb hauv lub zog thiab cov txheej txheem kev lag luam.
