Nrog rau kev tsim cov thev naus laus zis tshiab rau kev npaj cov tungsten alloy thiab cemented carbide, tungsten alloy thiab cemented carbide yuav tsis tsuas yog muaj kev loj hlob ntau dua hauv thaj chaw ntawm kev tiv thaiv hauv tebchaws, kev lag luam tub rog, aerospace thiab lwm yam, tab sis kuj tseem muaj kev nce ntxiv hauv kev lag luam. kev noj cov ntaub ntawv hluav taws xob, lub zog thiab lub zog ntawm lub tshuab hluav taws xob, uas yuav tsum tau nce 2 ~ 3 zaug. Yog li ntawd, kev lag luam zeem muag ntawm kev tsim cov khoom siv zoo refractory tungsten Taijin yog qhov dav, thiab cov txheej txheem tshiab thiab cov txheej txheem, nrog rau cov hlau txhaj tshuaj molding, thiab kev npaj technology ntawm nanocomposite hmoov thiab ultra-fine thiab fine-grained refractory tungsten alloy cov ntaub ntawv. , yuav dhau los ua kev tshawb fawb thiab kev loj hlob ntawm refractory tungsten raws li alloys thiab industrialization ntawm high-profit khoom nyob rau hauv lub xyoo pua 21st.
Nrog rau kev kwv yees kev txhim kho ntawm lub ntiaj teb no liquidity thiab lub rebound ntawm sab nraud xav tau, qhov kev thov elasticity ntawm tungsten muaj zog dua li ntawm tooj liab thiab lwm yam domestic xav tau dominated hlau vim qhov loj feem ntawm sab nraud xav tau; Nyob rau tib lub sijhawm, peb zoo siab txog kev rov qab los ntawm kev lag luam thoob ntiaj teb kev lag luam thiab kev rov qab los ntawm kev lag luam. Qhov kev thov rau tungsten nrog cov yam ntxwv muaj zog cyclical kuj yog qhov zoo. Qhov tsis sib xws ntawm cov khoom siv thiab kev xav tau txhawb nqa qhov nce ntawm tus nqi tungsten, thiab cov chaw tsim khoom lag luam tau txais txiaj ntsig zoo heev los ntawm nws. Tungsten thiab tooj liab tsis yaj ib leeg los yog tsim cov sib txuas sib txuas, thiab tuaj yeem tsim cov pseudoalloys nkaus xwb. Yog li ntawd, W-Cu alloy qhia txog cov khoom zoo heev xws li kub tsis kam, siab hardness thiab qis expansion coefficient ntawm tungsten thiab siab thermal conductivity, conductivity thiab zoo plasticity ntawm tooj liab. Vim lawv cov arc yaig tsis kam, fusion vuam tsis kam, cuam tshuam tsis kam thiab siab txhua yam muaj zog, cov hlau no tau siv dav hauv ib puag ncig nrog siab "corrosion" thiab siab "hnav".
Niaj hnub no yog ib tug era ntawm lub tswv yim tshiab, kev xav tshiab, tshiab technologies thiab cov txheej txheem tshiab. Kev taw qhia ntawm cov cuab yeej siv siab, kev tshawb fawb thiab kev tsim cov khoom siv high-tech thiab kev loj hlob thiab kev ruaj ntseg ntawm cov txheej txheem yuav inevitably nqa cov khoom nrog cov nqi siab dua thiab cov txiaj ntsig zoo, kev ua haujlwm siab, kev ua haujlwm ntau thiab ntau lub hom phiaj, thiab yuav qhib ib lub tswv yim. kev lag luam dav dua. Yog li ntawd, nws yog qhov tsim nyog los tsim cov thev naus laus zis tshiab thiab cov txheej txheem. Tungsten alloy electroplating es tsis txhob chromium thev naus laus zis chromium plating yog ib txwm siv thev naus laus zis, uas yog siv dav hauv cov txheej txheem ua haujlwm thiab cov txheej txheem zoo nkauj, tab sis qhov tsis zoo ntawm cov txheej txheem no yog: siab chromic acid concentration, muaj kuab paug siab ntawm chromium uas muaj dej khib nyiab thiab khib nyiab. Hexavalent chromium uas tsim thaum lub sij hawm chromium plating yog ib tug txaus ntshai carcinogen. Lub tuam tsev tiv thaiv ib puag ncig thoob plaws ntiaj teb tau tswj hwm kev tso tawm ntawm chromium pos huab thiab chromium uas muaj cov dej khib nyiab. Nws yog ib txoj hauj lwm tseem ceeb rau lub tuam tsev tiv thaiv ib puag ncig thoob plaws ntiaj teb kom tshem tawm tag nrho cov chromium plating. Yog li ntawd, nrhiav chromium hloov tshuab tau dhau los ua qhov xav tau ntawm txhua qhov kev tsim khoom lag luam.
Cov kev xav tau ntawm cov nqi tsim khoom, cov duab tsis yooj yim, kev ua haujlwm siab thiab ntau lub luag haujlwm ua rau cov txheej txheem uas twb muaj lawm thiab thev naus laus zis tuaj yeem ua tsis tau raws li qhov xav tau ntawm kev ua lag luam. Tam sim no, muaj ntau lub tuam txhab tsim khoom ntawm cov khoom siv hluav taws xob refractory tungsten raws li alloys, uas yog nyob rau hauv tib qib. Kev sib tw hnyav ntawm cov khoom ua rau cov neeg tsim khoom * txo tus nqi mus rau qhov zoo, tab sis cov khoom lag luam zoo thiab qib qis, ua rau lub voj voog vicious. Niaj hnub no, kev tshawb fawb ntawm cov ntaub ntawv refractory nyob rau hauv lub ntiaj teb no tau hloov zuj zus los ntawm cov tsoos "siab purity, ultra-fine thiab uniform" mus rau "nano, composite tsim thiab integrated formulation". Los ntawm cov thev naus laus zis no, refractory tungsten matrix composites tsis tuaj yeem khaws lawv cov khoom zoo xws li lub siab melting point thiab corrosion kuj, tab sis kuj zoo heev txhim kho lawv cov khoom siv kho tshuab. Yog li ntawd, kev npaj technology ntawm nanocomposite hmoov thiab ultra-fine thiab microcrystalline refractory tungsten alloy cov ntaub ntawv yuav dhau los ua ib tug kub thiab cog lus tshiab technology nyob rau hauv lub xyoo pua 21st.
