Rhenium thiab nws cov alloys yog ib chav kawm ntawm siab - cov ntaub ntawv ua tau zoo nrog rhenium ua cov matrix lossis lub ntsiab alloying. Vim lawv lub zog siab tshaj - qhov kub thiab txias, zoo heev creep tsis kam, zoo corrosion kuj, thiab lub cev muaj zog tshwj xeeb, lawv tuav txoj hauj lwm irreplaceable nyob rau hauv aerospace, siab - kub electronics, nuclear zog, thiab tshwj xeeb metallurgy. Rhenium yog qhov tsawg kawg nkaus hauv lub ntiaj teb cov pob zeb, tab sis nws cov khoom zoo heev ua rau nws muaj txiaj ntsig zoo rau kev siv engineering hauv cov xwm txheej hnyav.
Rhenium nws tus kheej muaj qhov siab tshaj plaws melting point, kwv yees li 3186 degree, thib ob tsuas yog rau tungsten ntawm cov hlau, thiab tuav lub zog zoo thiab rigidity txawm nyob rau qhov kub thiab txias. Nws qhov siab ceev, kwv yees li 21 g / cm³, muab cov thermal poob siab zoo thiab tshuaj lom neeg ruaj khov. Rhenium yog ductile ntawm chav tsev kub thiab yooj yim rau txheej txheem, thaum tuav lub microstructure ruaj khov ntawm qhov kub thiab txias, tiv thaiv grain coarsening los yog softening. Qhov no ua kom nws ntseeg tau txawm tias nyob rau hauv lub sijhawm ntev - qhov kub thiab txias kev pabcuam.
Rhenium alloys feem ntau yog tsim los ntawm kev sib txuas rhenium nrog lwm cov hlau refractory xws li tungsten, molybdenum, platinum, los yog npib tsib xee kom sib npaug machinability thiab siab -kub txhua yam khoom. Piv txwv li, rhenium-tungsten alloys ua ke cov ntsiab lus siab melting thiab siab toughness, ua rau lawv haum rau foob pob ua ntxaij nozzles, siab -kub cua kub ntsiab lus, thiab spacecraft thermal tiv thaiv Cheebtsam; rhenium-platinum alloys, vim lawv siab - kub stability thiab zoo corrosion kuj, feem ntau yog siv nyob rau hauv siab -kub thermocouples, catalyst nqa, thiab cov khoom tseem ceeb ntawm cov khoom siv hluav taws xob; thiab kev sib xyaw ua ke ntawm rhenium nrog npib tsib xee-raws li superalloys tuaj yeem txhim kho kev nkag siab thiab oxidation tsis kam ntawm aero- cav cov khoom xws li turbine hniav.
Nyob rau hauv cov nqe lus ntawm kev tsim cov txheej txheem, rhenium thiab nws cov alloys feem ntau yog tsim los ntawm cov hmoov metallurgy, lub tshuab nqus tsev melting, thiab kub isostatic pressing cov tswv yim los xyuas kom meej muaj pes tsawg leeg, ntom microstructure, thiab cov nqi tsis zoo. Vim yog tus nqi siab thiab tsis tshua muaj rhenium, cov khoom tsim khoom feem ntau sib xyaw ua ke ze ntawm -net-shape forming thiab siab - precision machining kom txo cov khoom pov tseg thiab siv ntau tshaj.
Daim ntawv thov ib puag ncig ntawm rhenium thiab nws cov alloys feem ntau yog cov mob hnyav xws li kub siab, kev nyuaj siab, muaj zog corrosion, lossis hluav taws xob. Piv txwv li, nyob rau hauv kub- ntu ntu ntawm aero- cav, rhenium alloys tuaj yeem tiv taus qhov cuam tshuam ntawm huab cua thiab cov txheej txheem thermal ntau tshaj 1500℃; nyob rau hauv nuclear reactors, rhenium alloys, vim lawv superior hluav taws xob tsis kam, tuaj yeem siv rau roj cladding thiab cov khoom siv; nyob rau hauv siab -kub hluav taws xob, qhov ruaj khov hluav taws xob thiab thermal conductivity ntawm rhenium alloys ua kom lub sij hawm ntev - txhim khu kev qha ua haujlwm ntawm siab - cov khoom siv fais fab.
Txawm hais tias qhov ua tau zoo ntawm rhenium thiab nws cov alloys, lawv cov nqi siab thiab kev ua haujlwm nyuaj yuav tsum muaj qhov sib txuam ntawm kev tsim thiab siv rau kev pabcuam. Tsis tas li ntawd, kev tsim qauv tsim qauv thiab cov txheej txheem tiv thaiv tuaj yeem txhim kho kev lag luam thiab kev ua neej ntev. Zuag qhia tag nrho, rhenium thiab nws cov alloys sawv cev rau pem hauv ntej ntawm cov khoom siv hlau refractory thiab yog cov ntaub ntawv tseem ceeb uas txhawb nqa cov kev lag luam siab niaj hnub no hauv kev daws cov teeb meem ntawm kev ua haujlwm hnyav.
