Rob Koltz naDave Meyer vakurukura nezvehunhu hwesimbi dzisina simbi dzakasungirirwa pamwe chete (ferritic) uye austenitic (non-magnetic).Getty Images
Mubvunzo: Ndiri kusudira tangi rakagadzirwa nesimbi isingatsvi 316, iyo isiri yemagineti. Ndakatanga kusudira matangi emvura newaya yeER316L uye ndakaona kuti ma welds acho ane magineti. Pane chandiri kuita chisina kunaka here?
A: Pamwe hauna chekunetseka nacho. Zvakajairika kuti ma weld akagadzirwa neER316L akwezve magnetism, uye zvakajairika kuti ma sheets nema sheets akamonerwa 316 asakwezve magnetism.
Ma alloys esimbi aripo muzvikamu zvakasiyana-siyana zvichienderana nekupisa uye mwero we alloying, zvinoreva kuti maatomu ari musimbi akarongwa zvakasiyana. Mazvikamu maviri akajairika ndee austenite neferrite. Austenite haina magineti nepo ferrite iri magineti.
Musimbi yakajairwa yekabhoni, austenite inguva inongovapo chete kana tembiricha yakakwira, uye sezvo simbi inotonhora, austenite inoshanduka kuita ferrite. Saka, patembiricha yemumba, simbi yekabhoni ine magineti.
Mhando dzakasiyana dzesimbi isina ngura, kusanganisira 304 ne316, dzinonzi austenitic stainless steels nekuti chikamu chadzo chikuru iaustenite patembiricha yemumba. Idzi simbi dzisina ngura dzinosimba kuita ferrite uye dzinoshanduka kuita austenite kana dzatonhodzwa. Maplate esimbi isina ngura eAustenitic nemapepa anotongwa nekutonhodzwa nekutenderedzwa, izvo zvinowanzoita kuti ferrite yese ishandurwe kuita austenite.
Pakati pezana remakore rechi20, zvakaonekwa kuti kana tichibatanidza simbi dzisina kusimba dzeaustenitic, kuvapo kwesimbi dzisina kusimba dzeferrite musimbi dzine weld kunodzivirira kupwanyika kwe microcracking (kupwanyika) kunogona kuitika kana simbi isina kusimba yefiller yave austenitic zvachose. Kudzivirira kupwanyika kwe microcracking, simbi zhinji dze filler dzesimbi dzisina kusimba dzeaustenitic dzakagadzirirwa kuva ne 3% kusvika 20% ferrite, saka dzinokwezva magineti. Kutaura zvazviri, ma gauges anoshandiswa kuyera huwandu hweferrite musimbi dzisina kusimba dzestainless steel anogonawo kuyera mwero wekukwezva kwemagnetic.
316 ine mamwe mashandisirwo akakosha ekuderedza hunhu hwemagineti hweweld, asi izvi hazviwanzodiwa mumatangi. Ndinovimba kuti munogona kuramba muchibatanidza pasina kunetseka.
WELDER, yaimbonzi Practical Welding Today, inoratidza vanhu chaivo vanogadzira zvigadzirwa zvatinoshandisa uye zvatinoshanda nazvo zuva nezuva. Magazini iyi yave ichishandira nharaunda yevanosanganisa simbi muNorth America kwemakore anopfuura makumi maviri.
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