1.4762 Stainless hlau yog dab tsi?

1.4762 stainless hlau, feem ntau hu ua 446 los yog UNS S44600, yog siab -chromium ferritic stainless hlau tsim rau tshwj xeeb tsis kam mus rau siab - kub oxidation thiab sulfidation. Nrog nws cov ntsiab lus siab chromium (23-27%), nws muaj qhov zoo tshaj qhov ntsuas kub ntawm qhov kub txog li 1100 degree, ua rau nws cov khoom xaiv rau kev xav tau kub kub xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov khoom siv kho cua sov uas cov pa roj carbon monoxide yuav sai sai degrade. Nws cov qauv ferritic muab cov thermal conductivity zoo thiab tsis tshua muaj thermal expansion, qhov tseem ceeb rau kev siv thermal cycling.

 

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

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4762
ASTM / AISI (USA)	446, UA S44600
Lub Npe	446

Nws cov ntsiab lus chromium siab yog qhov tseem ceeb rau nws qhov tshwj xeeb siab -kub oxidation tsis kam.

Lub ntsiab	C	Si	Mn	P	S	Cr	N
Cov ntsiab lus (%)	Tsawg dua los yog sib npaug li 0.20	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 1.5	Tsawg dua lossis sib npaug li 0.04	Tsawg dua los yog sib npaug li 0.03	23.0 - 27.0	Tsawg dua los yog sib npaug li 0.25

Nws muaj lub zog zoo ntawm qhov kub thiab txias nrog oxidation zoo heev.

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi zoo (Room Temp)	Ntau dua lossis sib npaug li 275 MPa	450 - 600 MPa	Ntau dua lossis sib npaug li 20%	Tsawg dua los yog sib npaug li 220

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4762 / 446

Exceptional High -Tub kub Oxidation Resistance:Cov ntsiab lus chromium siab (23-27%) muab kev tiv thaiv zoo rau scaling thiab oxidation hauv kev pabcuam txuas mus txog 1100℃(2010℃F) thiab kev pabcuam cuam tshuam txog 1050℃(1920℃F).

Zoo heev Sulfidation Resistance:Kev tiv thaiv zoo tshaj plaws rau cov sulfur- muaj cov huab cua ua rau nws zoo tagnrho rau kev siv siab - qhov kub thiab txias nyob rau hauv muaj cov roj combustion thiab sulfur compounds.

Tsawg Thermal Expansion:Ferritic qauv muab qis dua thermal expansion dua li qib austenitic, txo cov kev ntxhov siab thermal hauv kev siv cua sov.

Zoo thermal conductivity:Cov thermal conductivity ntau dua li austenitic stainless hlau, muaj txiaj ntsig zoo rau kev siv cua sov.

 

Cov ntawv thov tseem ceeb:

Rauv Cheebtsam:Radiant tubes, burner qhov chaw, retorts, muffles, thiab rauv linings.

Cov khoom siv kho cua sov:Txhawb daim phiaj, tais, pob tawb, thiab cov khoom siv rau kev kho cua sov.

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

Kev tsim hluav taws xob:Superheater raj, boiler Cheebtsam, thiab cua sov rov qab systems.

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 heat exchangers nyob rau hauv siab -sulfur ib puag ncig.

 

446 (1.4762) piv rau 310S (1.4845) thiab 316L (1.4404) li cas?
446 muaj kev ua haujlwm zoo tshaj oxidation ntawm qhov kub siab dua piv rau 310S thiab 316L. Thaum 310S yog qhov tsim nyog txog li 1150 degree, 446 muab kev ua haujlwm zoo txog li 1100℃nrog kev ua haujlwm zoo dua rau cov sulfur- muaj cov huab cua. Piv nrog rau 316L, uas yog txwv rau li 800 degree, 446 muaj peev xwm ua kom kub ntau dua. Txawm li cas los xij, 446 yog ferritic (sib nqus) nrog qis toughness ntawm chav tsev kub thiab txo weldability piv rau cov qib austenitic. 446 feem ntau yog xaiv rau cov ntawv thov uas siab - kub oxidation thiab sulfidation kuj yog qhov tseem ceeb, thiab qhov twg cov qauv ferritic thermal expansion cov yam ntxwv yog qhov zoo.

 

Dab tsi yog qhov kev txiav txim siab vuam rau 446 stainless hlau?
Vuam 446 yuav tsum tau ceev faj tswj vim nws cov qauv ferritic. 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 (200-300 degree) yog pom zoo kom txo thermal shock thiab tiv thaiv kev tawg

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 760-820℃ua raws li kev ua kom txias qeeb yuav tsum tau ua kom rov zoo dua

Rau cov ntawv thov tseem ceeb, vuam nyob rau hauv qhov kev mob annealed yog nyiam

Cov ntu tuab yuav tsum tau ua tib zoo saib xyuas cov txheej txheem kom tsis txhob tawg

 

Dab tsi yog qhov txwv ntawm 446 stainless hlau?
Thaum 446 muaj qhov tshwj xeeb siab - qhov ua haujlwm kub, nws muaj ntau qhov kev txwv:

Txhaum ntawm chav tsev kub, tshwj xeeb tshaj yog nyob rau hauv thicker seem thiab nyob rau hauv raws li -welded mob

Weldability tsis zoo piv rau qib austenitic, yuav tsum tau ua tib zoo tswj cov txheej txheem

Tsawg toughness, tshwj xeeb tshaj yog nyob rau hauv qis kub

Tsis haum rau cov ntawv thov cryogenic vim yog cov khoom siv ductile - mus rau - nkig hloov

tuaj yeem raug rau 475℃embrittlement tom qab lub sijhawm ntev ntawm 400-500℃ntau yam

Tsawg zog ntawm chav tsev kub piv rau nag lossis daus-qib hardening

 

Nrhiav kev ntseeg siab ntawm 1.4762 / 446 Stainless Hlau?
GNEE Steel muab tus nqi siab siab -kub 446 (1.4762) stainless hlau hauv phaj, ntawv, bar, thiab forging cov ntaub ntawv rau kev thov rau qhov cub thiab kev kho cua sov. 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.