Kev faib tawm thiab kev siv cov hlau tsis muaj hlau
Muaj ntau tshaj li 80 yam ntawm cov hlau tsis muaj hlau, tab sis muaj ntau hom non-ferrous alloys nrog cov khoom sib txawv. Lub zog thiab hardness ntawm non-ferrous alloys feem ntau yog siab dua li cov hlau ntshiab, lawv cov tsis kam yog ntau dua li cov hlau ntshiab, lawv qhov kub coefficient ntawm kev ua hauj lwm me me, thiab lawv muaj cov khoom zoo txhua yam. Feem ntau siv tsis-ferrous alloys xws li txhuas alloy, tooj liab alloy, magnesium alloy, npib tsib xee alloy, tin alloy, tantalum alloy, titanium alloy, zinc alloy, molybdenum alloy, zirconium alloy, thiab lwm yam.
Siv:
A: Tooj liab ntawm cov hlau tsis yog hlau yog ib qho ntawm cov khoom siv hlau siv los ntawm tib neeg. Nyob rau lub sijhawm niaj hnub no, cov hlau tsis muaj hlau thiab lawv cov alloys tau dhau los ua cov khoom siv thiab cov khoom siv tseem ceeb hauv kev tsim khoom, kev tsim kho, kev lag luam hluav taws xob, aerospace, kev siv hluav taws xob nuclear thiab lwm yam haujlwm.
B: Hauv kev siv tswv yim, cov hlau tsis yog hlau feem ntau muab faib ua 5 pawg:
1. Lub teeb hlau. Qhov ceev yog tsawg dua 4500 kg / cubic meter, xws li txhuas, magnesium, potassium, sodium, calcium, strontium, barium, thiab lwm yam.
2. Cov hlau hnyav. Qhov ceev ntau dua 4500 kg / m3, xws li tooj liab, npib tsib xee, cobalt, txhuas, zinc, tin, antimony, bismuth, cadmium, mercury, thiab lwm yam.
3. Cov hlau muaj txiaj ntsig. Nws yog kim dua li cov hlau uas nquag siv, muaj kev nplua nuj nyob rau hauv lub ntiaj teb crust, thiab yog ib qho nyuaj rau purify, xws li kub, nyiaj thiab platinum pab pawg neeg hlau.
4. Semi-hlau. Qhov xwm thiab tus nqi yog nruab nrab ntawm cov hlau thiab cov hlau tsis muaj hlau, xws li silicon, selenium, tellurium, arsenic, boron, thiab lwm yam.
5. Cov hlau tsis tshua muaj. Xws li cov hlau tsis tshua muaj, xws li lithium, rubidium, cesium, thiab lwm yam .;
Tsis tshua muaj refractory hlau, xws li titanium, zirconium, molybdenum, tungsten, thiab lwm yam.;
Tsis tshua muaj dispersed hlau, xws li gallium, indium, germanium, thallium, thiab lwm yam.;
Cov hlau tsis tshua muaj hauv ntiaj teb, xws li scandium, yttrium, thiab lanthanide series hlau;
Radioactive hlau, xws li radium, francium, polonium thiab uranium, thorium, thiab lwm yam nyob rau hauv lub Al series ntsiab.
