Cheap, non-alloyed steel feem ntau ua nkig ntawm txog -30 ºC Ntxiv cov hlau kim kim kim kub, nyiaj, platinum, thiab palladium txhua tus muaj ISO 4217 txiaj code. Cov hlau zoo tshaj plaws uas paub zoo yog cov hlau npib, uas yog kub thiab nyiaj. … Lwm cov hlau tseem ceeb muaj xws li cov platinum pab pawg hlau: ruthenium, rhodium, palladium, osmium, iridium, thiab platinum, uas platinum yog cov lag luam dav tshaj plaws. https://en.wikipedia.org › wiki › Precious_metal
Precious hlau - Wikipedia
zoo li npib tsib xee, cob alt thiab vanadium rau hlau txo qhov kub thiab txias los ntawm kev ntxiv dag zog rau kev sib txuas ntawm cov nplej. Kimura cov hlau tsis muaj cov khoom siv ntxiv, tab sis tsuas yog ua nkig ntawm -100 ºC, sib piv cov kev ua tau zoo ntawm alloys.
steel cuam tshuam li cas los ntawm qhov kub thiab txias?
Hlau nthuav thaum cua sov. Ntev, qhov chaw thiab ntim yuav nce nrog qhov kub thiab txias. Lub sij hawm scientific rau qhov no yog thermal expansion. … Thermal expansion tshwm sim vim cua sov ua rau cov kev co ntawm cov atoms nyob rau hauv cov hlau.
Dab tsi ua rau cov hlau nkig?
Thaum kawg, cov hlau ua nkig thaum nws raug dej txias, thiab qhov txias dua nws tau nkig ntau. Thaum nws thaum kawg tsoo cov dej khov nab kuab, cov hlau tawg yooj yim dua li nws yuav muaj qhov kub thiab txias.
Yuav ua li cas steel tsis nkig?
Maj mam cua sov cov hlau tawv thiab cia nws txias maj mam yuav tsim cov hlau uas tseem tawv tab sis kuj tsawg dua. Cov txheej txheem no hu ua tempering.
Lub sijhawm twg steel ua nkig?
pheej yig, tsis-alloyed steel feem ntau ua nkig ntawm kwv yees -30 ºCNtxiv cov hlau kim xws li npib tsib xee, cob alt thiab vanadium rau hlau txo qhov kub thiab txias los ntawm kev ntxiv dag zog rau kev sib txuas ntawm cov nplej. Kimura cov hlau tsis muaj cov khoom siv ntxiv, tab sis tsuas yog ua nkig ntawm -100 ºC, sib piv cov kev ua tau zoo ntawm alloys.
