Cov khoom siv dab tsi yog 347 stainless hlau?

Cov khoom siv dab tsi yog 347 stainless hlau?

347 stainless hlau yeeb nkab yog qib stainless hlau ua raws li American ASTM cov qauv. 347 stainless hlau yeeb nkab yog sib npaug rau kuv lub teb chaws 0Cr18Ni11Nb stainless hlau yeeb nkab.

Ib hom high-alloy steel uas tuaj yeem tiv taus corrosion hauv huab cua lossis tshuaj lom neeg corrosive media. Stainless hlau muaj qhov zoo nkauj nto thiab zoo corrosion kuj. Nws tsis tas yuav raug kho saum npoo av xws li xim plating, tab sis tuaj yeem siv cov khoom siv hauv qhov chaw ntawm cov hlau tsis huv thiab siv rau ntau daim ntawv thov. Ib hom hlau, feem ntau hu ua stainless hlau. Cov neeg sawv cev ua tau zoo suav nrog 13 chromium steel, 18-8 chromium-nickel steel thiab lwm cov hlau alloy siab.

Los ntawm qhov pom ntawm metallographic, vim tias cov hlau tsis muaj chromium, ib zaj duab xis nyias chromium yog tsim rau saum npoo. Cov yeeb yaj kiab no cais cov pa oxygen uas nkag mus rau hauv cov hlau thiab ua lub luag haujlwm hauv kev tiv thaiv corrosion. Yuav kom tswj tau qhov kev tiv thaiv corrosion ntawm stainless hlau, cov hlau yuav tsum muaj ntau tshaj 12% chromium.

Cov ntaub ntawv txuas ntxiv:

347 stainless hlau yeeb nkab: 18% chromium, 11% nickel

347 muaj tantalum ntxiv rau niobium thiab feem ntau yog siv rau cov khoom siv welded siv thaum kub kub.

347 stainless hlau yeeb nkab=0Cr18Ni11Nb muaj Nb los txhim kho kev tiv thaiv intergranular corrosion, txhim kho lub zog, thiab tsis txo cov yas. Txo cov thickness ntawm cov khoom. Raws li cov khoom siv lub cev muaj zog.

347 stainless hlau yeeb nkab kev kho cua sov: cov khoom siv kho mob (degree) 980-1150 cua txias sai

Txhua yam khoom ntawm 347 stainless hlau yeeb nkab austenitic steel tom qab kev kho cov tshuaj (GB/T4237-92) yield zog Ntau tshaj los yog sib npaug rau 205/MPa, tensile zog Ntau tshaj los yog sib npaug rau 520/MPa, elongation Ntau tshaj los yog sib npaug rau 35%, hardness test: HBS Tsawg dua lossis sib npaug rau 187, HRB Tsawg dua lossis sib npaug rau 90, HV Tsawg dua lossis sib npaug rau 200

Cov tshuaj muaj pes tsawg leeg ntawm 347 stainless hlau yeeb nkab yog C Tsawg dua lossis sib npaug rau 0.08, Si Less dua lossis sib npaug rau 1.00, Mn Tsawg dua lossis sib npaug rau 2. 00, P Tsawg dua lossis sib npaug rau 0.035, S Less dua lossis sib npaug rau 0.030, Ni=9~13, Cr=17.00~ 19.00, Nb Ntau dua lossis sib npaug rau 5 * C%