Lub hauv paus ntsiab lus ntawm Titanium Alloys

Titanium alloys yog cov alloys uas muaj titanium ua lub hauv paus thiab lwm yam khoom. Titanium muaj nyob rau hauv ob daim ntawv allotropic: -titanium nrog ib tug kaw -packed hexagonal qauv hauv qab no 882 degree, thiab -titanium nrog lub cev-centered cubic qauv saum toj no 882℃.

Alloying ntsiab tuaj yeem muab faib ua peb pawg raws li lawv cov kev cuam tshuam ntawm theem hloov pauv kub:

① Cov ntsiab lus ruaj khov rau theem thiab nce qib kev hloov pauv kub yog hu ua -stabilizing cov ntsiab lus, suav nrog txhuas, carbon, oxygen, thiab nitrogen. Aluminium yog lub ntsiab alloying nyob rau hauv titanium alloys, ho txhim kho lub alloy lub zog nyob rau hauv ob chav tsev thiab siab kub, txo nws cov kev nqus, thiab ua rau nws elastic modulus.

② Cov ntsiab lus ruaj khov rau theem thiab txo cov theem hloov pauv kub yog hu ua -stabilizing cov ntsiab lus, uas tuaj yeem muab faib ua ntau hom isomorphous thiab eutectoid. Cov qub muaj xws li molybdenum, niobium, thiab vanadium; Cov tom kawg suav nrog chromium, manganese, tooj liab, hlau, thiab silicon.

③ Cov ntsiab lus uas muaj kev cuam tshuam me ntsis rau theem hloov pauv kub yog hu ua cov ntsiab lus nruab nrab, suav nrog zirconium thiab tin.

Oxygen, nitrogen, carbon, thiab hydrogen yog lub ntsiab impurities hauv titanium alloys. Oxygen thiab nitrogen muaj siab solubility nyob rau hauv lub sij hawm, ho ntxiv dag zog rau titanium alloys tab sis txo lawv cov plasticity. Cov pa oxygen thiab nitrogen hauv titanium feem ntau tau teev tseg kom qis dua 0.15-0.2% thiab 0.04-0.05%, feem. Hydrogen muaj tsawg heev solubility nyob rau hauv lub theem; ntau hydrogen dissolution nyob rau hauv titanium alloys yuav tsim hydrides, ua rau cov alloy nkig. Cov ntsiab lus hydrogen hauv titanium alloys feem ntau yog tswj qis dua 0.015%. Lub dissolution ntawm hydrogen nyob rau hauv titanium yog reversible thiab yuav raug tshem tawm los ntawm lub tshuab nqus tsev annealing.