Izici ze-Tungsten Wire

Ngendlela yocingo, i-tungsten igcina izinto zayo eziningi ezibalulekile, okuhlanganisa indawo yayo ephezulu yokuncibilika, i-coefficient ephansi yokwanda okushisayo, kanye nomfutho we-vapor ophansi emazingeni okushisa aphakeme. Ngenxa yokuthi i-tungsten wire iphinde ibonise ukuguquguquka okuhle kukagesi kanye ne-thermal, isetshenziselwa kakhulu ukukhanyisa amadivaysi kagesi, nama-thermocouples.
Amadayamitha ocingo ngokuvamile avezwa ngamamilimitha noma amamilimitha (izinkulungwane zama-intshi). Nokho, i-tungsten wire diameter ngokuvamile iboniswa ngama-milligrams - 14.7 mg, 3.05 mg, 246.7 mg njalonjalo. Lo mkhuba uhlehlela emuva ezinsukwini lapho, bengenawo amathuluzi okulinganisa ngokunembile izintambo ezincane kakhulu (.001″ kufika ku-.020″ ububanzi), umhlangano wawuwukukala isisindo sika-200 mm (cishe u-8″) wentambo ye-tungsten nokubala. ububanzi (D) bentambo ye-tungsten esekelwe esisindweni ngobude beyunithi ngayinye, kusetshenziswa le fomula yezibalo elandelayo:

D = 0.71746 x impande yesikwele (mg isisindo/200 mm ubude)”

Ukubekezelela kobubanzi obujwayelekile okungu-1s士3% wesilinganiso sesisindo, nakuba ukubekezelelana okuqinile kuyatholakala, kuye ngokusetshenziswa komkhiqizo wentambo. Le ndlela yokuveza ububanzi iphinde icabange ukuthi ucingo lunobubanzi obungaguquki, obungenayo i-va「1ation ebalulekile, i-necking down, noma eminye imiphumela ye-conical noma yikuphi ku-diameter.
Ezintanjeni eziwugqinsi (.020″ kuya ku-.250″ ububanzi), i-millmeter noma isilinganiso se-mil siyasetshenziswa; ukubekezelelana kuvezwa njengephesenti lobubanzi, ngokubekezelela okujwayelekile okungu-1.5%
Intambo ye-tungsten eningi ifakwe amanani okulandela e-potassium edala ukwakheka okusanhlamvu okude, okuxhumene okukhangisa izinto ezingezona ze-sag ngemva kokwenziwa kabusha kwekristalu. Lo mkhuba usukela emuva ekusetshenzisweni okuyinhloko kwentambo ye-tungsten kumalambu okukhanya kwe-incandescent, lapho amazinga okushisa amhlophe angabangela ukucwila kwefilament kanye nokungasebenzi kwesibani. Ukwengezwa kwe-alumina yama-dopants, i-silica, ne-potassium esigabeni sokuxutshwa kwempushana kungashintsha izici zomshini zocingo lwe-tungsten. Enqubweni yokushisa okushisayo nokudweba okushisayo kwentambo ye-tungsten, i-alumina ne-silica gas ephumayo kanye ne-potassium kusale, okunikeza ucingo izakhiwo zalo ezingancibiliki futhi kuvumela ama-incandescent ama-incandescent ukuthi asebenze ngaphandle kokukhonkotha nokuhluleka kwefilament.
Nakuba ukusetshenziswa kwentambo ye-tungsten namuhla kuye kwanda ngaphezu kwama-filaments ezibani ze-incandescent, ukusetshenziswa kwama-dopants ekukhiqizeni izintambo ze-tungsten kuyaqhubeka. Icutshungulwe ukuze ibe nezinga lokushisa eliphakeme le-recrystallization kunalapho isesimweni sayo esihlanzekile, i-doped tungsten (kanye ne-molybdenum wire) ingahlala i-ductile ekamelweni lokushisa kanye namazinga okushisa aphezulu kakhulu okusebenza. Umphumela wesakhiwo esinde, esistakiwe sinikeza izici zezintambo ezigobile njengokuzinza okuhle kokumelana ne-creep, kanye nokwenza lula kancane kunomkhiqizo omsulwa (ongavuliwe).

Intambo ye-Doped tungsten ivamise ukukhiqizwa ngosayizi ukusuka ngaphansi kuka-0.001″ ukuya ku-0.025″ ububanzi futhi isasetshenziselwa imicu yesibani nefilament yezintambo, kanye nokuba wusizo kuhhavini, ekubekeni, nasekusetshenzisweni kwezinga lokushisa eliphezulu. Ngaphezu kwalokho, ezinye izinkampani (kuhlanganise ne-Metal Cutting Corporation) zinikeza i-tungsten wire ehlanzekile, engavaliwe ukuze kusetshenziswe lapho ubumsulwa bubaluleke kakhulu. Ngalesi sikhathi, intambo ye-tungsten emsulwa etholakalayo ingu-99.99% emsulwa, eyenziwe ngempushana emsulwa engu-99.999%.

Ngokungafani nemikhiqizo yocingo lwensimbi eyinsimbi - engakwazi uku-oda izifunda ezi-1n ezihlukene, kusukela kokuqinile kuya kububanzi obubanzi bezimo zokugcina ezithambile - intambo ye-tungsten njengento ehlanzekile (nangaphandle kokukhetha okulinganiselwe kwama-alloys) ayisoze yaba nohlu olunjalo izakhiwo. Kodwa-ke, ngenxa yokuthi izinqubo namathuluzi ayahlukahluka, izici zomshini we-tungsten kufanele zihluke phakathi kwabakhiqizi, ngoba abekho abakhiqizi ababili abasebenzisa usayizi ofanayo webha ecindezelweyo, okokusebenza okukhethekile kokuswayipha, kanye neshejuli yokudweba neyokunamathisela. Ngakho-ke, kungaba ukuqondana kwenhlanhla ngokuphawulekayo uma i-tungsten eyenziwe izinkampani ezahlukene ibe nezakhiwo ezifanayo zemishini. Eqinisweni, zingahluka ngo-10%. Kodwa ukucela umenzi wezintambo ze-tungsten ukuthi aguqule amanani akhe okuqina ngo-50% akunakwenzeka.