316 vs 316L Stainless hlau

Q1: Dab tsi yog qhov txawv ntawm 316 thiab 316L stainless hlau?

A1: Qhov sib txawv tseem ceeb yog cov ntsiab lus carbon: 316 muaj cov ntsiab lus siab tshaj plaws ntawm 0.08%, thaum 316L muaj cov ntsiab lus siab tshaj plaws ntawm 0.03%. Cov pa roj carbon tsawg hauv 316L no tiv thaiv kev tsim cov chromium carbides ntawm cov ciam teb thaum lub sij hawm vuam los yog kev kho cua sov (450-850 degree), tshem tawm intergranular corrosion nyob rau hauv tshav kub{11}} cuam tshuam cheeb tsam. Piv txwv li, 316 tej zaum yuav raug cuam tshuam rau intergranular corrosion tom qab vuam yam tsis muaj kev kho cua sov tom qab.

Q2: Ua li cas cov khoom siv ntawm 316 thiab 316L txawv?

A2: Cov khoom siv kho tshuab zoo ib yam, tab sis 316 muaj lub zog me ntsis vim nws cov ntsiab lus carbon ntau dua: 316 muaj lub zog tensile ntawm Greater dua los yog sib npaug rau 515 MPa thiab tawm lub zog ntawm ntau dua los yog sib npaug rau 205 MPa, thaum 316L muaj lub zog tensile ntawm Greater dua los yog sib npaug rau 485 MPa ntau dua los yog sib npaug ntawm 485 MPa thiab yield zog muaj me ntsis zoo dua ductility (elongation Greater tshaj lossis sib npaug li 45%) piv rau 316 (elongation Ntau dua lossis sib npaug li 40%). Ob qib muaj qhov zoo tshaj plaws weldability thiab formability, nrog 316L yog qhov tsim nyog rau ntau- hla vuam.

Q3: Hauv daim ntawv thov twg yuav tsum 316L nyiam dua 316?

A3: 316L yog nyiam nyob rau hauv: 1. Welded structures uas tsis tuaj yeem ua haujlwm tom qab-weld solution annealing (piv txwv li, lub tank loj, cov chaw sab nrauv). 2. Ib puag ncig muaj kev cuam tshuam rau intergranular corrosion (xws li, tshuaj nroj tsuag tuav cov kua qaub, siab -cov dej kub){10} High- daim ntaub ntawv purity (xws li kev lag luam tshuaj thiab semiconductor manufacturing) qhov twg hlau ion leaching yuav tsum raug txo kom tsawg. 4. Nyias- cov khoom siv phab ntsa uas xav tau ntau qhov kev sib txuas, raws li 316L txo qhov kev pheej hmoo ntawm vuam corrosion.

Q4: Thaum twg 316 stainless hlau xaiv zoo dua li 316L?

A4: 316 yog qhov zoo dua hauv: 1. Cov ntawv thov uas xav tau lub zog siab dua (piv txwv li, cov khoom siv hauv tsev, siab- cov kav dej siab) qhov twg tom qab-weld kev kho cua sov yog ua tau. 2. Tsis yog -welded Cheebtsam (xws li, stamped qhov chaw, machined Cheebtsam) qhov twg intergranular corrosion tsis yog kev txhawj xeeb. 3. Tus nqi- cov haujlwm tseem ceeb, raws li 316 feem ntau yog 5-10% pheej yig dua li 316L vim qhov yuav tsum tau ua qis dua. 4. Cov ntawv thov kub kub (tsawg dua lossis sib npaug rau 870 degree) qhov twg cov pa roj carbon ntau dua txhim kho kev nkag siab.

Q5: Puas yog 316 thiab 316L puas muaj cov tshuaj tiv thaiv tib yam hauv cov tshuaj chloride?

A5: Yog lawm, lawv cov tshuaj chloride corrosion kuj yuav luag zoo tib yam. Ob leeg muaj 2-3% molybdenum, muab kev tiv thaiv zoo rau pitting thiab crevice corrosion nyob rau hauv ib puag ncig uas muaj chloride. Qhov sib txawv ntawm cov ntsiab lus carbon tsis cuam tshuam rau chloride corrosion kuj; nws tsuas cuam tshuam intergranular corrosion kuj tom qab vuam. Rau kev siv dej hiav txwv, ntug dej hiav txwv, lossis tshuaj lom neeg nrog cov tshuaj chloride, ob qib zoo dua rau 304, nrog rau kev xaiv nyob ntawm qhov xav tau vuam.