Brass vs kub
Ob qho tib si kub thiab tooj dag muaj keeb kwm ntev thiab feem ntau siv hauv ntau qhov chaw niaj hnub no. Txawm hais tias lawv muaj cov yam ntxwv zoo sib xws, feem ntau yog vim muaj cov xim daj daj, muaj ntau qhov sib txawv ntawm ob qho tib si los ntawm cov tshuaj lom neeg, lub cev, thiab kev lag luam.
kub
Ntau txhiab xyoo kub tau siv los ua jewellery, ornaments ntawm huab tais thiab poj huab tais, raws li ib tug txiaj thiab kuj rau kev lag luam txiaj. Kub yog ib qho ci ntsa iab hlau uas yog mos tab sis kuj ntom ntom hauv lub cev. Nyob rau hauv lub periodic rooj, nws yog pom nyob rau hauv cov kev hloov pauv hlau thiab muaj atomic no.79 nrog lub cim 'Au' uas sawv cev rau 'Aurum', lo lus Latin rau kub. Nws muaj cov ntsiab lus melting siab heev ntawm 1, 064.43 ° C thiab qhov ntom ntawm 19.32 grams ib cubic centimeter.
Kub yog cov hlau tsis tshua muaj nyob rau hauv qhov xwm txheej hauv cov hlab ntsha quartz thiab cov pob zeb thib ob uas yog cov hlau dawb lossis hauv ib lub xeev ua ke. Kub kuj yeej tsis xeb. Qhov no piav qhia ntxiv txog cov tshuaj inertness ntawm cov hlau uas tiv thaiv oxidation nyob rau hauv ib txwm muaj mob. Sib nrug los ntawm nws ci ntsa iab, qhov inertness ntawm cov hlau tau ua rau nws kim heev thiab siv rau hauv kev lag luam xws li kev tsim cov hniav nyiaj hniav kub. Kub tej zaum yuav raug alloyed nrog lwm yam hlau, muab cov yam ntxwv sib txawv thiab cov khoom.
E.g. Dawb Kub 18K - (75% kub, 18.5% nyiaj, 1% tooj liab, 5.5% zinc)
Red Kub 18K - (75% kub, 25% tooj liab)
Hnub no, 1kg kub yuav kwv yees li ntawm USD 50822.29 uas tuaj yeem suav tias kim heev. Vim qhov kev hloov pauv ntawm tus nqi ntawm cov kub nws pom tias yog lub sijhawm ntawm kev nqis peev hauv cov ntaub ntawv ntawm npib, tuav, jewelery thiab pauv pauv nyiaj. Tsis tas li ntawd, kub kuj tseem siv rau hauv kev sib pauv nyiaj, tshuaj, khoom noj / dej haus thiab khoom siv hluav taws xob. Hais tias cov hlau muaj nuj nqis npaum li cas, tseem muaj lub rooj sab laj ntawm kub los saib nws tus nqi thiab ntau lawm.
Brass
Brass tsis yog hlau ntshiab. Nws yog ib qho alloy ntawm ob hlau uas yog tooj liab thiab zinc. Los ntawm kev sib txawv ntawm cov tooj liab thiab zinc sib xyaw, ntau hom tooj dag tuaj yeem tsim tau. Nws yog daj nyob rau hauv cov xim thiab muaj ib tug zoo li kub zoo li no feem ntau siv nyob rau hauv decorations. Brass kuj tseem siv los ua cov xauv, pob qhov rooj, bearings thiab lwm yam raws li nws muab kev sib txhuam tsawg. Brass muaj qhov taw tes qis qis (900- 940 ° C) thiab yog cov khoom siv yooj yim los nrum vim nws cov yam ntxwv ntws. Qhov ceev ntawm tooj dag yog kwv yees li 8.4-8.73 grams ib cubic centimeter.
Tsis tas li ntawd, tooj dag tuaj yeem ua kom muaj zog dua thiab tiv taus corrosion los ntawm qhov sib ntxiv ntawm Aluminium. Vim muaj tooj liab, tooj dag qhia tau hais tias muaj cov tshuaj tua kab mob thiab cov kab mob uas ua rau cov kab mob ntawm cov kab mob puas. Lwm yam khoom zoo ntawm tooj dag yog nws cov acoustics. Vim li no, ntau yam twj paj nruag xws li horn, trumpet, trombone, tuba cornet thiab lwm yam yog ua los ntawm tooj dag. Cov cuab yeej no tseem muaj npe nyob rau hauv tsev neeg "xov tooj cua".
kub thiab tooj dag yog dab tsi?
• Kub yog kim heev thaum piv rau tooj dag.
• tooj dag yog qhov tseem ceeb ntawm cov hlau, qhov kub yog cov hlau ntshiab.
• Kub tau ntau dua ntom ntom thiab melting-point ntau dua tooj dag ntau dua hauv qhov cub thiab 144 ° C sib txawv hauv melting point).
• Kub yeej tsis xeb thaum tooj dag yog rusting.
• Kub tau pom hnyav hauv kev lag luam jewelery, tab sis tooj dag yog ntau dua rau kev lag luam thiab ornamental industries.
• Kub yog cov hlau muaj nuj nqis thiab muaj nws lub rooj sab laj saib xyuas nws, tab sis tooj dag tsis muaj dab tsi li.
• Kub yog siv los ua cov txiaj ntsig kev lag luam thiab kev nqis peev, qhov tooj dag tsis siv nyob rau hauv ib qho ntawm cov saum toj no.
Nyeem ntxiv:
1. Qhov txawv ntawm Brass thiab Bronze
