Refractory Co. Cov ntaub ntawv hais txog tungsten.

Refractory co - ib tug txheej txheem cej luam

Feem ntau, hais txog "refractory co" yuav tsum to taub tias cov no yog co uas muaj ib tug heev melting kub, tej zaum nws yuav mus txog 4000 ° C. Molybdenum, tantalum, tungsten, niobium thiab rhenium - lub ntsiab yooj refractory hlau. Tsis tas li ntawd daim ntawv no yuav muab ntxiv, thiab lwm leej lwm tus - chromium, vanadium, osmium, hafnium, thiab zirconium co, lub melting kub nce mus txog 2123 ° C.

Refractory co yog nthuav rau lawv lub zog. Yog li, piv txwv li, kev ntsuas ntawm molybdenum thiab tungsten hardness pab kom cov kev siv ntawm cov co rau lub tshav kub kev kho mob ntawm cov ntaub ntawv nyob rau hauv lub tshuab nqus tsev. Cov khoom ua los ntawm ib co refractory co muaj cim zog, e.g., tungsten filaments khaws cia filament kub rau 3073 ° C.

Tab sis tus kuj refractory co muaj peev xwm yuav ntaus nqi mus rau lawv lub ntsiab tsis zoo. Tiv tauj nrog cov pa ho influences rau lub thermal thaj chaw ntawm refractory hlau. Qhov no yog vim li cas txoj kev siv cov co nyob rau hauv no pab pawg neeg - nyob rau hauv ib qhov chaw uas lawv yuav tsum tau kiag li cais los ntawm cov huab cua.

Tungsten - lub hauv paus ntawm refractory co nyob rau hauv metallurgy

Tungsten yog ib tug ntawm cov feem ntau refractory hlau. Lub melting point ntawm tungsten yog siab tshaj tus so, tungsten - hnyav hlau, nws yog tau kos zoo threads, nws yog tseem txig weldable. Tungsten yog ib tug tsis tshua hlau, nws cov ntsiab lus nyob rau hauv lub kiav txhab nce mus txog xwb 0,0055%, nws twb tsis pom nyob rau hauv lub hnub ci spectrum thiab nws tsis yog tam sim no nyob rau hauv lub seawater. Tab sis nws tej chaw yog tsis inferior mus rau lub hlau tsawg tsis tshua muaj co.

Kev siv ntawm tungsten

Nws yog xim hlau tungsten siv rau manufacturing filament yarns, uas yog siv nyob rau hauv lub teeb pom kev zoo pab kiag li lawm raws li ib tug caij cua kub - nyob rau hauv lub tshuab nqus tsev furnaces kuj. Lub siab ceev ntawm tungsten tso cai rau kev siv ntawm no hlau raws li ib tug counterweight rau txawv projectiles. Raws li cov tungsten electrode siv thaum lub sij hawm tig welding. Nyob rau hauv lub khoom alloys ntawm tungsten carbide yog siv raws li muab tub lim.

Tungsten li molybdenum, thiab tantalum yog siv raws li ib tug txoj cai nyob rau hauv lub alloys, uas yog siv nyob rau hauv qhov chaw ntawm qhov chaw nuclear technology. Cov muaj peev xwm los mus tiv heev kub - lub hom phiaj tseem ceeb rau cov uas cov alloys raug tsim.