Lub ntsiab
15crmog yog achromium - molybdenum (cr - mo) alloy steelTshwj xeeb yog tsim rau high - kev pab kub. Tus "g" hauv nws cov qauv (raws li Suav cov qauv zoo li GB 5310) sawv rau "laib" (钢), txhais tau tias nws yog aSeamless steel yeeb nkab rau high - Siab boilers.
Nws yog cua sov - ionistant steel uas muaj lub zog zoo thiab kev tiv thaiv kom ntsuas kub, feem ntau nyob rau hauv ntau ntawm 400℃rau 550 degree.
Tshuaj lom neeg muaj pes tsawg leeg (ib leeg%)
Qhov muaj pes tsawg leeg yog lub hauv paus ntawm nws cov khoom. Cov ntsiab lus tseem ceeb suav nrog:
| Lub ntsiab | Cov ntsiab lus (%) | Rooj mov |
|---|---|---|
| Carbon (c) | 0.12 - 0.18 | Muab cov khoom siv muaj zog thiab hardness. |
| Chromium (cr) | 0.80 - 1.10 | Txhim kho kev xeb & oxidation tsis kam; Txhim kho qhov siab - lub zog kub. |
| Molybdenum (mo) | 0.45 - 0.65 | Tseem ceeb nce lub zog ntawm kev kub siab thiab txhim kho cov creep kuj. |
| Manganese (mn) | 0.40 - 0.70 | Txhim kho cov khoom siv nyuaj thiab muaj zog. |
| Silicon (si) | 0.17 - 0.37 | Deagidizer thaum lub sij hawm statmaking statmaking, nce zog. |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.025 | Impurity, khaws qis kom tiv thaiv brittleness. |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.025 | Impurity, khaws cia tsis muaj kev txhim kho ductility thiab weldability. |
NCO TSEG: Txwv tsis pub muaj tseeb yuav sib txawv me ntsis nyob ntawm tus qauv tsim khoom (piv txwv li GB 5310, AV 5310).
Cov Khoom Siv Neeg Kho Tshuab
Cov khoom tau tsim los ntawm kev kho cua sov (normalizing thiab tempering).
| Ntiag tug | Tus nqi (tom qab kev kho cua sov) |
|---|---|
| Lub zog tensile (RM) | Ntau dua los yog sib npaug rau 440 MPa |
| Yield zog (RP0.2) | Ntau dua los yog sib npaug rau 295 mpa |
| Elongation (a) | Ntau dua los yog sib npaug rau 22% |
| Kev Cuam Tshuam Lub Zog (AKV) | Ntau dua los yog sib npaug rau 34 j |
Cov yam ntxwv tseem ceeb & Cov txiaj ntsig zoo
Zoo heev - kub lub zog:Khaws nws cov khoom siv zog ua haujlwm zoo dua li cov pa hlau thaum raug ntev ntev.
Zoo creep resistance:Tsis kam tawm ntawm txoj kev mus qeeb thiab ua kom ruaj khov nyob rau hauv tas li kev ntxhov siab kev ntxhov siab thaum kub. Qhov no yog qhov tseem ceeb rau cov leeg boiles.
Zoo oxidation tiv:Cov ntsiab lus chromium cov ntsiab lus ruaj khov, tiv thaiv oxide txheej (croo₃) ntawm cov dav hlau, tiv thaiv kev sib tw ntau dhau.
Zoo thermal floueflue:Muaj peev xwm wolden cyclic cua sov thiab cua txias.
Zoo weldability:Nws yog med weldable, tab sis yuav tsum tau ua ntej- cua sov thiab tshaj tawm {}}}}} kev kub ntxhov ntawm thaj chaw (Haz) thiab daws kev ntxhov siab.
Cov ntawv thov MAIN
Cov kav dej num yog siv nyob rau hauv lub zog loj thiab petrochemical Industries thiab} kub, siab- qhov kev siv kub:
Siab - Siab Lub Siab Boiles Tubes:Superheater leeg, kev tu tsiaj, evaporator leeg, thiab siab {{}} kub hews hauv pob txha pob hluav taws xob.
Tub Rog Hluav Taws Xob:Hauv cov roj av ntxiv thiab cov nroj tsuag tshuaj uas nyob qhov twg cov txheej txheem suav nrog kub siab.
Seamless steel kav rau siab lub hom phiaj:Siv nyob rau hauv ntau cov hlab siab thiab cov raj twj ua haujlwm ntawm cov chaw kub.
Cov Qauv Muaj Feem
Suav Txheem (GB): GB 5310{{0 {}} "Seamless Cov Hlau Hlaub Rau Kev Kub Siab Boiler"
Nov yog thawj tus qauv qhia kom paub qhov yuav tsum tau ua rau 15crmog.
Cov Kev Sib Luag Thoob Ntiaj Teb:
ASTM A335 P12{{0- Tus Qauv American qib yog zoo heev hauv kev sib xyaw thiab kev thov.
17175 13} crmo44- Tus neeg German sib npaug.
En 10216-2 13} crmo4-5- Cov European cov qauv sib npaug.
Thaum cov khoom muaj pes tsawg leeg yog qhov sib ze heev, lawv tsis zoo ib yam. Hloov chaw ncaj qha yuav tsum tau ua tib zoo saib xyuas cov qauv tsim tshwj xeeb thiab cov qauv.
Kev tsim khoom thiab kev kho cua sov
Seamless 24crmog kav yog tsim los ntawm cov txheej txheem zoo li kub extrusion lossis teb thau teb. Cov kav dej kawg yog ib txwm muab rau hauvThaum tshav kub kub -} kho mob(normalized thiab tempered) kom ua tiav qhov xav tau micrtructure (feem ntau yog cov qauv kub lossis cov hlaws dai) thiab cov khoom siv tshuab.
Daim Ntawv Txiav Txim Rau Vuam
Vuam 15crmog yog ib qho muaj tab sis yuav tsum muaj cov txheej txheem nruj:
Pre - cua sov:Qhov tseem ceeb los tiv thaiv kom txhob hydrogen -} induced txias tawg. Raug pre - sov kub yog 150-200 degree.
Muab Tub Hlau:Yuav tsum siv sib phim lossis tshaj -} sib txuam alloy electrodes / xaim (piv txwv li, e /} xxx hom).
Post - Weld Kev Kho Tshav Kub (PWHT):Yuav tsum ua rau Temper lub Hard Martensitic qauv hauv Weld thiab Haz, Restore txoj kev nyuaj siab, thiab ua kom muaj kev ntxhov siab uas muaj kev ntxhov siab. Ib tug raug PWTT kub yog nyob ib ncig ntawm 680-720 degree.
Kev sib piv nrog lwm qib
vs . 20 g (carbon hlau):20G yog cov pa roj carbon hlau boiler roj siv rau cov ncauj lus kub qis (piv txwv li cov ntsiab lus dej)-}}} kub seem zoo li superheaters.
vs . 12 cr1movg:Cov qib kawm no muaj ntau dua cov ntsiab lus chromium ntau dua, muab cov ntsiab lus tseem ceeb dua - kub lub zog thiab cov ntaub ntawv siv ntau dua.
Lub ntsiab
15Cog Cov Yeeb Nkab Seamless Steelyog cov khoom tseem ceeb hauv high -} kub engineering. Nws cov khoom sib xyaw ntawm chromium thiab Molybdenum muab kev txhim khu kev ua ke ntawm high {- Cov khoom siv kub ua haujlwm rau Boiler thiab cov txheej txheem kev lag luam siab.
