Stainless hlau yog lub hauv paus ntawm kev tsim khoom niaj hnub, muaj npe nrov rau nws cov kav ntev, kev tiv thaiv corrosion, thiab ntau yam. Ntawm ntau qib muaj, Steel 347H sawv tawm raws li qhov siab -kev ua tau zoo rau kev lag luam uas xav tau lub zog tshwj xeeb ntawm qhov kub siab.
Kab lus no muab cov ntsiab lus dav dav ntawm347H stainless hlau phaj, piav qhia txog lawv cov khoom, qhov zoo, thiab cov ntawv thov tseem ceeb, tsim los txhawb ob tus kws tshaj lij thiab cov neeg tuaj saib dav.
Taw qhia rau 347H Stainless Hlau
347H stainless hlau yog austenitic stainless hlau alloy uas suav nrog niobium (Nb) txhawm rau txhim kho siab - qhov kub thiab txias thiab ua haujlwm rau intergranular corrosion. Qhov "H" hauv 347H qhia txog cov ntsiab lus carbon ntau dua, feem ntau yog li ntawm 0.04% txog 0.10%, uas txhim kho cov khoom nkag siab ntawm qhov kub siab.
Cov neeg tsim khoom feem ntau xaiv 347H daim hlau rau cov ntawv thov uas lub zog, oxidation tsis kam, thiab thermal stability yog qhov tseem ceeb, xws li hauv kev tsim hluav taws xob, kev ua tshuaj, thiab kev lag luam aerospace.
Tshuaj muaj pes tsawg leeg ntawm 347H Stainless hlau
Cov muaj pes tsawg leeg ntawm 347H yog ua tib zoo tsim kom muaj kev ruaj ntseg nyob rau hauv huab cua txias. Cov muaj pes tsawg leeg (feem pua ntawm qhov hnyav) yog raws li nram no:
|
Element |
Kev sib xyaw (%) |
|
Cov pa roj carbon (C) |
0.04 – 0.10 |
|
Chromium (Cr) |
17 – 19 |
|
Nickel (Ni) |
9 – 13 |
|
Niobium (Nb) |
0.5 min |
|
Manganese (Mn) |
2 max |
|
Silicon (Si) |
1 max |
|
Phosphorus (P) |
0.045 max |
|
Sulfur (S) |
0.03 max |
|
Hlau (Fe) |
Tshuav |
Qhov sib ntxiv ntawm niobium yog qhov tseem ceeb. Niobium khi nrog carbon los tiv thaiv chromium carbide tsim, txo qis intergranular corrosion, uas yog ib qho kev txhawj xeeb hauv siab - carbon stainless hlau.
Mechanical Properties
347H stainless hlau daim hlau nthuav tawm zoo heev txhua yam muaj zog ntawm ob qho tib si ambient thiab siab kub, ua rau lawv zoo tagnrho rau kev thov cov qauv siv. Hauv qab no yog cov ntsiab lus ntawm cov khoom siv kho tshuab tseem ceeb:
|
Khoom |
Tus nqi |
|
Tensile zog |
515-750 MPa |
|
Yield zog |
205-310 MPa |
|
Elongation ntawm Break |
40 – 50% |
|
Hardness (Brinell) |
170-220 HB |
|
Impact Toughness |
Zoo heev, txawm nyob rau qhov kub siab |
Kev txhim kho siab - qhov kub thiab txias yog feem ntau vim yog niobium stabilization thiab cov pa roj carbon ntau dua, ua rau 347H cov khoom siv txhim khu kev qha rau cov hlab ntsha siab, boilers, thiab cov khoom siv hluav taws xob.
Geo-Cov lus qhia kom zoo: Hais txog cov ntawv thov kev lag luam nrog rau cov khoom ua rau muaj kev cuam tshuam hauv zos rau kev tshawb fawb xyaw tsom rau cov lus nug.
Corrosion Resistance
Corrosion kuj yog ib qho kev txhais ntawm 347H stainless hlau daim hlau. Kev sib xyaw ntawm chromium, npib tsib xee, thiab niobium ua rau muaj kev tawm tsam:
Intergranular corrosion - tshwm sim los ntawm carbide nag lossis daus raws lis ciam teb.
Oxidation - txawm tias kub txog 950 degree.
Acidic thiab chloride ib puag ncig - muaj nyob rau hauv tshuaj thiab petrochemical nroj tsuag.
Qhov no ua rau 347H tshwj xeeb tshaj yog haum rau siab - qhov kub thiab txias corrosive ib puag ncig, qhov twg lwm yam stainless hlau, xws li 304 lossis 316, yuav ua tsis tau raws sijhawm.
Thermal Properties
Lub thermal stability ntawm 347H yog qhov tseem ceeb hauv cov ntawv thov uas muaj kev sib txuas ntxiv siab - kub raug. Cov khoom tseem ceeb ntawm thermal muaj xws li:
Kev pabcuam kub siab tshaj plaws: 950℃hauv kev pabcuam txuas ntxiv; 1010℃hauv kev siv tsis tu ncua.
Coefficient ntawm thermal expansion: ~ 16.2 µm / m·℃ntawm 20-100 degree, uas ua kom muaj kev ruaj ntseg nyob rau hauv lub tshav kub.
Thermal conductivity: Nruab nrab, tso cai rau kev hloov hluav taws xob zoo yam tsis muaj kev cuam tshuam cov qauv kev ncaj ncees.
Cov khoom no ua rau 347H zoo tagnrho rau chav boilers, qhov chaw rauv, thiab cov raj superheater, qhov kev ua haujlwm zoo ib yam hauv kev ntxhov siab thermal tsis yog - sib tham.
Fabrication thiab Weldability
347H stainless hlau daim hlau yog cov ua haujlwm tau zoo, muab cov qauv zoo thiab weldability. Cov kev coj ua zoo tshaj plaws suav nrog:
- Vuam:Tau tshaj TIG, MIG, thiab kuj welding txoj kev. Preheating feem ntau tsis tas yuav tsum tau, tab sis post-weld stress-relief yog pom zoo rau siab - kub daim ntawv thov.
- Kev tsim:Cov phaj tuaj yeem dov, khoov, thiab sib sib zog nqus kos yam tsis muaj kev cuam tshuam corrosion.
- Machining:Machining yuav tsum siv cov kua txiav kom tsis txhob ua hauj lwm hardening.
Kev sib xyaw ua ke ntawm cov khoom siv dag zog thiab kev yooj yim ntawm kev tsim ua rau 347H yog qhov kev xaiv zoo tshaj plaws hauv kev lag luam uas cov duab kev cai thiab siab - cov khoom yuav tsum tau muaj tseeb.
Cov ntawv thov tseem ceeb ntawm 347H Stainless Hlau Phaj
347H stainless hlau daim hlau ua lub luag haujlwm tseem ceeb hauv kev lag luam raug rau qhov kub thiab txias ib puag ncig. Qee cov ntawv thov tseem ceeb suav nrog:
Lub zog tiam
Superheater thiab reheater raj
Boiler raj
Thaum tshav kub kub exchanger Cheebtsam
Kev lag luam tshuaj thiab Petrochemical
Reactor hlab ntsha
Cov khoom siv kho cua sov
Piping rau corrosive kua
Aerospace thiab Tsheb thauj mus los
Jet engine Cheebtsam
Exhaust systems
Siab -qhov kub ntawm cov qauv
Kev lag luam roj thiab roj
Offshore platform piping
Cov hlab ntsha siab
Refineries 'siab -cov khoom siv ua haujlwm kub
Cov ntawv thov no txhawb nqa 347H lub peev xwm los tswj kev ua kom muaj kev ncaj ncees nyob rau hauv kev ntxhov siab, tiv thaiv corrosion, thiab tiv taus thermal cycling.
Kev sib piv nrog lwm yam Stainless hlau
Nkag siab li cas 347H piv nrog rau lwm yam stainless hlau pab engineers thiab buyers ua paub xaiv:
|
Stainless hlau qib |
Cov ntsiab lus carbon |
Siab -Tsub Muaj Zog |
Corrosion Resistance |
Daim ntawv thov |
|
304 |
0.08 max |
Nruab nrab |
Zoo |
General -lub hom phiaj |
|
316 |
0.08 max |
Nruab nrab |
Zoo heev (chlorides) |
Kev ua tshuaj lom neeg |
|
321 |
0.08 max |
Siab (Ti-stabilized) |
Zoo heev |
Siab -temp, corrosion{1}}resistant |
|
347H |
0.04–0.10 |
Siab heev |
Zoo heev |
Boilers, kub exchangers |
347H's siab-carbon thiab niobium stabilization muab kev nkag siab zoo thiab kev ntxhov siab rupture tsis kam ntawm qhov kub siab piv rau 304 thiab 316.
Xaus
347H stainless hlau daim hlau yog siab - cov ntaub ntawv ua haujlwm tau tsim los rau ib puag ncig uas xav tau tshwj xeeb siab - kub lub zog, corrosion kuj, thiab thermal stability. Lawv versatility nyob rau hauv lub zog tsim, tshuaj ua, aerospace, thiab roj thiab roj industries ua rau lawv ib tug tseem ceeb xaiv rau engineers, designers, thiab procurement specialists.
Los ntawm kev nkag siab txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, kev tiv thaiv corrosion, thermal cwj pwm, thiab cov txheej txheem tsim, cov neeg siv khoom tuaj yeem txiav txim siab txog kev xaiv 347H daim hlau rau lawv cov ntawv tshwj xeeb. Kev nqis peev hauv 347H stainless hlau ua kom muaj kev ntseeg siab, lub neej ntev, thiab kev ua haujlwm zoo hauv kev xav tau kev ua haujlwm.
Rau cov chaw tsim khoom thiab cov kws tshaj lij kev lag luam nrhiav kev kub siab - kub, corrosion- cov kev daws teeb meem, 347H stainless hlau daim hlau tseem nyob rau sab saum toj -tier kev xaiv, ntsuas kev ua tau zoo, tus nqi- ua tau zoo, thiab kav ntev.
