Cov khoom siv dab tsi yog 254SMO stainless hlau? Kev sib piv ntawm Suav thiab txawv teb chaws hom
254SMO stainless hlau yog austenitic stainless hlau. Vim nws cov ntsiab lus molybdenum siab, nws muaj qhov ua haujlwm siab heev rau pitting thiab crevice corrosion. Qib stainless hlau no tau tsim los siv rau hauv ib puag ncig uas muaj halides xws li dej hiav txwv. 254SMO kuj tseem muaj kev tiv thaiv zoo rau kev xeb. Tshwj xeeb tshaj yog nyob rau hauv cov kua qaub uas muaj halides, cov hlau no zoo dua li cov hlau tsis zoo li qub. Nws cov ntsiab lus C yog<0.03%, so it is called pure austenitic stainless steel (<0.01% is also called super austenitic stainless steel). Super stainless steel is a kind of special stainless steel. First of all, it is different from ordinary stainless steel in chemical composition. It refers to a high alloy stainless steel containing high nickel, high chromium and high molybdenum. Among them is 254SMo containing 6% Mo. This type of steel has very good local corrosion resistance. It has good pitting corrosion resistance (PI ≥ 40) and good corrosion resistance in seawater, air, gaps, and low-speed erosion conditions. It has excellent stress corrosion resistance and is a substitute material for Ni-based alloys and titanium alloys. Secondly, in terms of high temperature resistance or corrosion resistance, it has better high temperature resistance or corrosion resistance, which is irreplaceable for 304 stainless steel. In addition, from the classification of stainless steel, the metallographic structure of special stainless steel is a stable austenite metallographic structure.
Txij li qhov tshwj xeeb stainless hlau no yog cov khoom siv high-alloy, cov txheej txheem tsim khoom yog qhov nyuaj heev. Feem ntau, tib neeg tuaj yeem tso siab rau cov txheej txheem ib txwm ua los tsim cov hlau tsis muaj steel tshwj xeeb, xws li nchuav, forging, dov, thiab lwm yam.
Cov khoom tseem ceeb ntawm 254SMO stainless hlau: 254SMo muaj cov pa roj carbon (C) Tsawg dua lossis sib npaug rau 0.{{10}}2, manganese (Mn) Tsawg dua lossis sib npaug rau 1.{{ 5}}, npib tsib xee (Ni) 17.5 ~ 18.5, silicon (Si) Tsawg dua lossis sib npaug rau 0.8, phosphorus (P) Tsawg dua lossis sib npaug rau 0.03 , sulfur (S) Tsawg dua lossis sib npaug ntawm 0.01, chromium (Cr) 19.5-20.5, tooj liab (Cu) 0.5-1.0, molybdenum (Mo) 6.{{23} }.5
Cov qauv hauv tebchaws: UNS S31254, DIN / EN 1.4547, ASTM A280, ASME SA-280
254SMO stainless hlau txhawb cov khoom siv vuam: ERNiCrMo-3 vuam hlau, ENiCrMo-3 vuam qws
254SMO stainless hlau daim ntawv thov teb:
1. Dej hiav txwv: Marine cov qauv hauv marine ib puag ncig, seawater desalination, seawater aquaculture, seawater heat exchange, thiab lwm yam.
2. Kev tiv thaiv ib puag ncig: flue gas desulfurization khoom rau thermal zog tsim, kev kho dej khib nyiab, thiab lwm yam.
3. Lub zog teb: atomic zog tsim, kev siv cov thee, nthwv dej tsim hluav taws xob, thiab lwm yam.
4. Petrochemical kev lag luam: roj refining, chemical khoom, thiab lwm yam.
5. Khoom noj khoom haus: ntsev ntau lawm, soy sauce brewing, thiab lwm yam.
6. High concentration chloride ion ib puag ncig: ntawv kev lag luam, ntau yam khoom siv tshuaj dawb
254SMO stainless hlau siab kub resistant
1. Muaj ntau qhov kev sim thiab kev siv ntau yam qhia tau hais tias txawm nyob rau ntawm qhov kub thiab txias me ntsis, 254SMO muaj crevice corrosion kuj nyob rau hauv seawater. Tsuas yog ob peb hom stainless hlau muaj qhov ua tau zoo no.
2. Lub corrosion kuj ntawm 254SMO nyob rau hauv acidic daws thiab oxidizing halide cov kev daws teeb meem yuav tsum tau rau daim ntawv bleaching ntau lawm yog piv rau npib tsib xee-raws li alloys thiab titanium alloys muaj zog corrosion kuj.
3. Vim tias 254SMO muaj cov ntsiab lus nitrogen ntau dua, nws lub zog muaj zog yog siab dua lwm hom austenitic stainless hlau. Tsis tas li ntawd, 254SMO muaj ductility siab thiab cuam tshuam lub zog thiab zoo weldability.
4. Lub siab molybdenum cov ntsiab lus ntawm 254SMO tso cai rau nws kom muaj oxidation ntau dua thaum lub sij hawm annealing, uas ua rau ib tug rougher nto dua li qub stainless hlau tom qab pickling. Tab sis qhov no tsis muaj qhov cuam tshuam rau corrosion kuj ntawm cov hlau.
Tshuaj muaj pes tsawg leeg ntawm 254SMO stainless hlau:
Carbon C: Tsawg dua lossis sib npaug rau 0.02
Silicon Si: Tsawg dua lossis sib npaug rau 0.70
Manganese Mn: Tsawg dua lossis sib npaug rau 1.00
Phosphorus P: Tsawg dua lossis sib npaug rau 0.03
Sulfur S: Tsawg dua lossis sib npaug rau 0.01
Chromium Cr: 19.5 - 20.5
Molybdenum Mo: 6 - 7
Nickel Ni: 17.5-18.5
Copper cu: 0 5 - 1
Nitrogen N: 0 18 - 0.25
