1.4742 Stainless hlau yog dab tsi?

1.4742 stainless hlau, feem ntau hu ua X10CrAlSi24 los yog UNS S12400, yog siab -chromium ferritic tshav kub- stainless hlau nrog tshwj xeeb siab - kub oxidation kuj vim nws siab chromium thiab txhuas cov ntsiab lus. Nrog 23-26% chromium thiab 1.20{13}}1.80% txhuas, nws muaj kev tiv thaiv zoo tshaj plaws rau scaling thiab oxidation ntawm qhov kub txog li 1100 degree, ua ke nrog kev ua haujlwm zoo heev rau sulfidation thiab carburization. Qhov sib ntxiv ntawm aluminium txhawb kev tsim kom muaj kev ruaj khov, ua raws li aluminium-chromium oxide nplai uas muab kev tiv thaiv txawm tias nyob rau hauv qhov kub thiab txias ib puag ncig. Qhov no ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev thov kev siv xws li cov khoom siv hluav taws xob, cov khoom siv kho cua sov, thiab kev ua haujlwm petrochemical.

 

Qhov kub zoo tshaj no - qib ferritic resistant yog tus qauv raws li cov txheej txheem thoob ntiaj teb tseem ceeb.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4742
ASTM / AISI (USA)	X10CrAlSi24, UNS S12400
Lub Npe	Chromium{0}} txhuas hlau

Nws muaj pes tsawg leeg muaj xws li siab chromium thiab elevated aluminium rau superior siab -kub oxidation kuj.

Element	C	Si	Mn	P	S	Cr	Al
Cov ntsiab lus (%)	Tsawg dua lossis sib npaug li 0.12	0.70 - 1.40	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.04	Tsawg dua lossis sib npaug li 0.03	23.0 - 26.0	1.20 - 1.80

Nws muaj qhov zoo siab - kub lub zog thiab tshwj xeeb oxidation kuj.

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi zoo (Room Temp)	Ntau tshaj lossis sib npaug li 300 MPa	500 - 700 MPa	Ntau dua lossis sib npaug li 20%	Tsawg dua los yog sib npaug li 220
Tus nqi zoo (900 degree)	~ 35 MPa	~ 55 MPa	~ 40%	-

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4742 / X10CrAlSi24

Superior High -Tub kub Oxidation Resistance:Cov ntsiab lus chromium siab (23-}26%) ua ke nrog elevated aluminium (1.20-1.80%) txhawb kev tsim kom muaj kev ruaj khov, ua tau zoo heev aluminium-chromium oxide nplai uas muab tshwj xeeb tsis kam rau scaling thiab oxidation txog li 1100℃(2010℃F).

Zoo heev Sulfidation thiab Carburization Resistance:Ua tau zoo tshwj xeeb hauv cov sulfur- muaj thiab carburizing cua nyob qhov twg cov pa stainless hlau sai degrade.

Zoo Thermal Fatigue Resistance:Cov qauv ferritic muab kev ua haujlwm zoo rau thermal cycling, ua rau nws tsim nyog rau kev siv nrog rov ua cua sov thiab txias.

Tsawg Thermal Expansion:Tsawg thermal expansion dua li qib austenitic, txo cov thermal stress nyob rau hauv daim ntawv thov cua sov cyclic.

 

Cov ntawv thov tseem ceeb:

Rauv Cheebtsam:Radiant tubes, cua sov cov ntsiab lus, rauv hauv ob sab phlu, burner qhov chaw, thiab txhawb daim phiaj.

Cov khoom siv kho cua sov:Retorts, muffles, pob tawb, thiab cov tais rau siab -kub kub kho cov haujlwm.

Petrochemical Kev Lag Luam:Cheebtsam hauv kev hloov pauv, crackers, thiab siab - cov khoom siv txheej txheem kub.

Muaj cua sov:Recuperators, tshav kub exchangers, thiab radiant tube sheaths.

Kev lag luam iav:Cov cuab yeej siv iav thiab cov khoom siv hluav taws xob.

Kev lag luam cement:Preheater cyclones thiab ducting.

Waste Incineration:Combustion Chambers thiab cua sov exchangers.

 

1.4742 piv rau 1.4762 (446) thiab 1.4720 (X10CrAlSi18) li cas?
1.4742 muaj qhov siab tshaj -kub oxidation tsis kam piv rau 1.4762 thiab 1.4720 vim nws cov ntsiab lus siab ntawm txhuas (1.20-1.80% vs. 0.70-1.20}%). Qhov siab dua aluminium txhawb kev ruaj khov thiab tiv thaiv oxide nplai, muab kev tiv thaiv zoo dua rau kev ntsuas ntawm qhov kub siab. Thaum 1.4762 muaj cov ntsiab lus chromium zoo sib xws (23-27%), 1.4742 cov txhuas ntxiv muab kev txhim kho oxidation tsis kam, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov cua sov. Piv rau 1.4720 (17-19% Cr, 0.70-1.20% Al), 1.4742 muaj peev xwm kub siab dua (1100℃vs . 950℃) thiab zoo dua rau cov huab cua nruj heev. 1.4742 yog qhov kev xaiv zoo tshaj plaws rau cov kev thov siab tshaj plaws ntawm kev siv oxidation qhov siab tshaj plaws.

 

Dab tsi yog qhov kev txiav txim siab vuam rau 1.4742?
Vuam 1.4742 yuav tsum tau ceev faj tswj vim nws cov qauv ferritic thiab cov ntsiab lus siab aluminium. Cov ntsiab lus tseem ceeb suav nrog:

Kev siv hluav taws xob qis qis yog qhov tseem ceeb los txo qis kev loj hlob ntawm cov qoob loo hauv tshav kub- cuam tshuam cheeb tsam

Preheating (250-350 degree) raug pom zoo rau cov ntu tuab kom txo tau cov thermal shock

Austenitic muab tub lim hlau (309L, 310L) tau pom zoo kom zoo dua vuam ductility thiab kom tsis txhob embrittlement

Tshaj tawm -weld annealing ntawm 780-820℃ua raws li kev ua kom txias qeeb yuav tsum tau ua kom rov zoo dua

Cov ntsiab lus ntawm aluminium siab tuaj yeem cuam tshuam rau lub pas dej da dej thiab yuav xav tau cov tswv yim tshwj xeeb

Rau cov ntawv thov tseem ceeb, vuam yuav tsum tau ua nrog cov txheej txheem tsim nyog

Kev tiv thaiv vuam yog feem ntau nyiam rau daim ntawv thov nyias nyias

 

Qhov ntsuas kub li cas yog 1.4742 haum rau?
1.4742 yog tsim rau kev pabcuam txuas ntxiv mus txog li 1100℃(2010℃F) thiab kev pabcuam cuam tshuam txog 1150℃(2100℃F). Nws tuav cov oxidation zoo heev nyob rau hauv no ntau yam, ua rau nws haum rau feem ntau xav tau ntawm lub cub tawg Cheebtsam thiab siab -kub muaj txheej txheem. Rau cov ntawv thov uas yuav tsum tau muaj peev xwm kub dua (siab dua 1150 degree), nickel-raws li superalloys yuav tsum tau. Cov ntsiab lus txhuas muab kev tiv thaiv tshwj xeeb tiv thaiv kev ntsuas ntawm qhov kub siab, tab sis cov khoom siv tau txwv tsis pub nkag siab tshaj 1000℃thiab yuav tsum tsis txhob siv rau kev thauj khoom -cov ntawv thov ntawm qhov kub siab no.

 

Nrhiav rau kev ntseeg siab ntawm 1.4742 Stainless Hlau?
GNEE Steel muab cov nqi siab siab -kub 1.4742 (X10CrAlSi24) stainless hlau hauv phaj, ntawv, bar, thiab sawb cov ntaub ntawv rau qhov xav tau kub tshaj plaws- daim ntaub ntawv tiv taus. Peb muab cov ntaub ntawv pov thawj tag nrho (EN 10204 3.1) thiab kev txhawb nqa suav nrog kev txiav, kev tsim, thiab kev taw qhia vuam. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.