Raws li peb paub alloys muaj siab resistivity thiab siab melting point piv rau cov hlau ntshiab. Yog li cov hlau tsis tuaj yeem yooj yim hlawv lossis oxidize ntawm qhov kub siab dua. Tam sim no raws li peb xav kom kub siab dua hauv cov khoom siv cua sov yog li peb siv cov alloys hauv cov khoom siv cua sov.
Vim li cas cov alloys siv hauv cov khoom siv cua sov?
Alloys yog siv rau hauv cov khoom siv hluav taws xob cua sov ntau dua li cov hlau ntshiab vim qhov kev tiv thaiv ntawm cov hlau yog ntau dua li qhov kev tiv thaiv ntawm cov hlau ntshiab. Alloys tsis hlawv yooj yim txawm nyob rau hauv high kub. … Nichrome tsis hlawv yooj yim ntawm qhov kub thiab txias xws li nws muaj qhov kub thiab txias dua li cov hlau.
Vim li cas cov alloys feem ntau siv hauv cov khoom siv hluav taws xob xws li hluav taws xob hlau thiab lub rhaub?
Assertion: Alloys feem ntau siv hauv cov khoom siv hluav taws xob cua sov xws li hluav taws xob hlau thiab cov cua sov. Yog vim li cas: Resistivity ntawm ib qho hlau feem ntau siab dua li ntawm nws cov khoom siv hlau tab sis cov alloys muaj cov ntsiab lus melting tsawg dua li lawv cov hlau sib xyaw.
Yuav ua li cas yog siv rau hauv hluav taws xob rhaub?
Nichrome: Feem ntau cov xaim hluav taws xob cua sov feem ntau siv nichrome 80/20 (80% Nickel, 20% Chromium) hlau, ribbon, los yog sawb. Nichrome 80/20 yog cov khoom siv zoo tshaj plaws, vim tias nws muaj qhov ua haujlwm siab thiab tsim cov txheej txheem ntawm chromium oxide thaum nws tau sov thawj zaug.
Cov hlau twg yog siv hluav taws xobCov khoom cua sov?
Nichrome yog cov hlau alloy ua los ntawm ib ncig ntawm 20 feem pua ntawm chromium thiab 80 feem pua nickel. Tus yuam sij rau kev ua haujlwm ntawm cov khoom siv hluav taws xob cua sov yog lub luag haujlwm ntawm nichrome hauv nws. Nichrome tau tshwm sim sai sai ua cov hlau lead uas siv los ntawm cov khoom siv hluav taws xob cua sov.
