Copper Tube Yog Ntev
Cov tshuaj muaj hlau khov khov yog ruaj khov, thiab nws muab cov cua txias tuaj yeem ua kom sov, ua haujlwm tsis haum, ua haujlwm tsis muaj zog thiab tua hluav taws ua haujlwm (lub pob zeb tawg ntawm lub siab yog 1083 degrees Celsius). Nws tuaj yeem siv rau hauv tej qhov chaw sib txawv ntev. Txoj haujlwm ntawm lub raj roj muaj peev xwm ua tau ntev npaum li lub neej ntawm ib lub tsev, lossis ntev dua. Piv txwv li, cov khoom siv dej khis hauv hauv Peking Union Tsev Kho Mob College College thaum xyoo 1920 tau ua tiav zoo dua 70 xyoo. Nws tuaj yeem pom tias cov raj yeeb nkab yog cov yeeb nkab uas tau raug kuaj tas sim neej tom qab ntau tshaj li ib puas xyoo dhau los thiab kev ua haujlwm zoo.
Tooj liab yog qhov zoo thiab txhim khu kev ntseeg
Lub raj tooj tooj sib txuas nrog cov kev zoo ntawm cov yeeb nkab thiab cov yeeb nkab tsis txuas. Nws nyuab dua cov yeeb nkab yas thiab muaj zog ntawm cov hlau (lub zog ntawm cov xim sib tsoo pob txha sib sib sib zog nqus yog sib npaug ntawm cov yeeb nkab ntawm tib phab ntsa tuab); nws muaj ntau dua li lub cev zoo tib yam, tau zoo toughness thiab siab ductility, thiab muaj zoo heev anti-vibration thiab anti-kev co. Kev cuam tshuam thiab kev tiv thaiv ua kom tsis muaj zog.
Lub raj npog tuaj yeem tiv taus cov mob khaub thuas thiab kub heev, ntawm -196 degrees mus txog 250 degrees, thiab ua raws li kev hloov pauv hauv qhov kub thiab txias (-high temperature - low temperature - high temperature), qhov kev hloov tsis tau hloov vim yog lub sij hawm ntev siv thiab qhov kub Thiab nws yuav tsis ua rau kev laus. Qhov no yog dhau qhov ncav cuag cov kav dej.
Qhov linear expansion coefficient ntawm lub raj muaj tooj yog me me, uas yog 1/10 ntawm lub raj yas, thiab tiv taus qaug zog. Thaum hloov qhov kub, nws tsis ua mob thermal expansion thiab contraction, ua rau muaj kev nyuab siab tawg.
Cov nta no ua rau cov hlab tooj liab tsis tshua muaj txiaj ntsim zoo rau cov kev siv hauv cheeb tsam txias. Nyob rau hauv lub txias thiab txias cheeb tsam, qhov kub qhov txawv nruab nrab ntawm thaum sawv ntxov thiab yav tsaus ntuj yog loj. Qhov ncaj qha coefficient ntawm cov kav dej zoo tib yam yog qhov loj thiab lub zog muaj tsawg, thiab nws yooj yim los ua kom muaj kev nyuab siab tawg vim kev thermal expansion thiab contraction. Ib txhia hais tias -20 degrees tsis txhav, tiam sis qhov tseeb tsis muaj peev xwm tiv thaiv txoj haujlwm ua haujlwm, thiab lub neej ua haujlwm tsis txaus, nws tsis muaj qhov tseem ceeb. Txawm hais tias rwb thaiv kev tiv thaiv yuav raug siv tau, nws tsis yooj yim kom tsis txhob kub tsawg thaum kev thauj mus los, kev cia khoom thiab kev kho, thiab tooj. Kev ua tiav ntawm lub raj yog tib yam ntawm -183 degrees thiab ntawm tsev sov.
