Qhov Tseem Ceeb Qhov txawv - Ferrous thiab Nonferrous Alloys
Ib qho hlau yog cov hlau ua los ntawm ob lossis ntau lub ntsiab lus hlau los txhim kho lub zog thiab kev tiv thaiv corrosion. Qhov sib txawv tseem ceeb ntawm ferrous thiab nonferrous alloys yog tias ferrous alloys muaj hlau nyob rau hauv lawv cov muaj pes tsawg leeg whereas non-ferrous alloys tsis muaj hlau ua ib yam khoom. Ob leeg ntawm cov alloys no feem ntau siv nyob rau hauv niaj hnub kev lag luam thiab engineering daim ntaub ntawv, tab sis rau kev siv sib txawv. Vim tias ob lub alloys muaj cov yam ntxwv tshwj xeeb, thiab nws txawv nyob ntawm lwm cov khoom siv hlau muaj nyob hauv cov hlau thiab cov xwm txheej siv hauv cov txheej txheem tsim khoom. Txawm li cas los xij, ob qho tib si ferrous thiab non-ferrous alloys yog qhov tseem ceeb sib npaug hauv ntau hom kev lag luam.
Ferrous Alloys yog dab tsi?
Ferrous alloys yog cov alloys uas muaj hlau thiab lwm yam hlau. Cov alloys no tau siv dav hauv ntau qhov kev lag luam vim nws cov yam ntxwv zoo xws li lub zog ntau dua, toughness, thiab yooj. Cov khoom no sib txawv me ntsis ntawm ib hom mus rau lwm qhov nyob ntawm lawv cov muaj pes tsawg leeg, cov txheej txheem kho cua sov, uas ua rau muaj kev hloov pauv hauv micro-structure kawg. Piv txwv ntawm ferrous alloys yog carbon steels, stainless steels, alloy steels, cam khwb cia hlau thiab cam khwb cia hlau.
Txawm hais tias, kev siv cov hlau tsis muaj hlau, cov khoom sib xyaw, thiab cov polymers tau tshwm sim hauv khw, kev siv cov hlau raws li cov hlau tseem ceeb heev. Nws yog vim tus nqi qis, siab modulus ntawm elasticity, thiab muaj peev xwm ua kom muaj ntau yam khoom siv kho tshuab.
Stainless hlau
Non-ferrous Alloys yog dab tsi?
Non-ferrous alloys tsis muaj hlau ua hlau, thiab nws yuav muaj ob lossis ntau dua lwm yam hlau. Qee cov khoom ntawm cov hlau tsis muaj hlau yog qhov tseem ceeb tshaj ferrous alloys vim nws cov hluav taws xob zoo heev thiab kev tiv thaiv corrosion. Cov alloys no tuaj yeem suav tias yog qhov thib ob tseem ceeb tshaj plaws engineering khoom. Tsis tas li ntawd, qee qhov yog cov thermal conductors zoo, thiab tuaj yeem yooj yim machined, welded, brazed thiab soldered. Cov khoom ntawm non-ferrous alloys sib txawv ntawm ntau yam nyob ntawm seb cov khoom siv hlau ua ke los tsim cov hlau thiab cov txheej txheem txheej txheem. Yog li ntawd, lawv daim ntawv thov kuj txawv ntawm ib qho hlau mus rau lwm qhov.
Aluminium Alloys
Qhov txawv ntawm Ferrous thiab Nonferrous Alloys yog dab tsi?
Type:
Ferrous Alloys: Hlau (Fe) yog siv los ua lub hauv paus hlau hauv ferrous alloys. Ntau hom ferrous alloys muaj nyob hauv khw. Qee qhov piv txwv yog;
- Carbon steels- muaj cov pa roj carbon thiab me me ntawm lwm cov hlau alloying, xws li manganese lossis aluminium.
- Alloy steels- muaj cov qib qis mus rau qib siab xws li chromium, molybdenum, vanadium thiab nickel.
- Stainless steels- muaj chromium thiab / lossis nickel ntxiv. Lawv tiv taus corrosion heev.
- cam khwb cia hlau- muaj cov pa roj carbon ntau. Cov hlau cam, grey hlau, thiab cov cam khwb cia hlau dawb yog hom cam khwb cia hlau.
- Cam khwb cia hlau - ua los ntawm nchuav hlau molten rau hauv pwm.
Non-ferrous Alloys: Non-ferrous alloys tuaj yeem categorized raws li lub hauv paus hlau uas yog siv los ua cov hlau. Lawv yog; Aluminium alloys, Beryllium alloys, Magnesium alloys, Copper alloys, Nickel alloys, thiab Titanium alloys.
Properties:
Ferrous Alloys: Cov khoom ntawm ferrous alloys sib txawv ntawm ntau yam raws li qhov muaj pes tsawg leeg thiab cov txheej txheem ntau lawm txawv ntawm ib qho hlau mus rau lwm qhov. Feem ntau, lwm yam hlau yog ntxiv los txhim kho corrosion resistant zog thiab txhim khu lub zog. Txawm li cas los xij, ntxiv rau cov hlau (Fe), ntau yam khoom siv hlau tau ntxiv kom tau txais cov khoom siab tshaj, nyob ntawm qhov kev thov.
Non-ferrous Alloys:
Txhua yam tsis yog-ferrous alloys tsis sib koom ua ke; nws txawv raws li qhov muaj pes tsawg leeg thiab txoj kev kho cua sov hauv kev tsim cov hlau. Qee yam ntawm cov yam ntxwv sib txawv ntawm cov hlau sib txawv tau teev tseg hauv qab no.
- Aluminium alloys: Lawv muaj 30 npaug zog dua li cov ntshiab txhuas.
- Beryllium alloys: Cov alloys no kim vim cov txheej txheem ntau lawm.
- Magnesium alloys: Tsis zoo corrosion kuj nyob rau hauv ib puag ncig marine. Kev qaug zog tsis zoo, nkag mus thiab hnav tsis kam.
- tooj liab alloys: Feem ntau ntawm cov tooj liab alloys yog cov cua sov thiab hluav taws xob zoo heev.
- Nickel alloys: Lawv yog cov hlau kub kub thiab ua kom pom kev tiv thaiv corrosion ntau dua.
- Titanium alloys: Lawv muaj cov khoom tiv thaiv corrosion zoo heev thiab cov khoom kub-kub.
