Iimpawu zeTungsten Wire

Ngendlela yocingo, i-tungsten igcina izinto zayo ezininzi ezixabisekileyo, kubandakanywa indawo yayo ephezulu yokunyibilika, i-coefficient ephantsi yokwandiswa kwe-thermal, kunye noxinzelelo oluphantsi lomphunga kumaqondo okushisa aphezulu. Ngenxa yokuba ucingo lwe-tungsten lukwabonisa umbane olungileyo kunye ne-thermal conductivity, isetyenziselwa kakhulu ukukhanyisa izixhobo ze-electronic, kunye ne-thermocouples.
Iimitha zocingo zibonakaliswa ngokubanzi ngeemilimitha okanye iimilimitha (amawakawaka e-intshi). Nangona kunjalo, i-tungsten wire diameter idla ngokuchazwa kwiimilligrams - 14.7 mg, 3.05 mg, 246.7 mg njalo njalo. Lo mkhuba ubuyela kwiintsuku apho, ukunqongophala kwezixhobo zokulinganisa ngokuchanekileyo iingcingo ezibhityileyo (.001″ ukuya kuthi ga .020" ububanzi), indibano yayikukulinganisa ubunzima be-200 mm (malunga ne-8″) yocingo lwe-tungsten kwaye ubale. Idayamitha (D) yocingo lwetungsten olusekwe kubunzima ngobude beyunithi nganye, kusetyenziswa le fomyula ilandelayo yemathematika:

D = 0.71746 x ingcambu yesikwere (ubunzima bemg/200 mm ubude)”

Ukunyamezela kwedayamitha esemgangathweni 1s士3% yomlinganiselo wobunzima, nangona ukunyamezela okunamandla kufumaneka, kuxhomekeke kwisicelo semveliso yocingo. Le ndlela yokubonisa i-diameter ikwathatha ukuba ucingo lunedayamitha engaguqukiyo, ngaphandle kwe-va「1ation ebalulekileyo, i-necking ezantsi, okanye ezinye iziphumo ze-conical naphi na kwi-diameter.
Kwiingcingo ezishinyeneyo (.020″ ukuya .250″ ubukhulu), i-millmeter okanye umlinganiselo we-mil uyasetyenziswa; Ukunyamezela kubonakaliswa njengepesenti yobubanzi, kunye nokunyamezela okusemgangathweni 士1.5%
Uninzi lweentambo ze-tungsten zifakwe kwi-trace ye-potassium idala i-elongated, i-interlocking yesakhiwo senkozo ekhupha iipropati ezingenayo i-sag emva kokuhlaziywa kwakhona. Olu qheliselo lusukela emva ekusetyenzisweni okuphambili kocingo lwe-tungsten kwiibhalbhu zokukhanya ze-incandescent, xa amaqondo obushushu amhlophe-obushushu angenza i-filament sag kunye nokusilela kwesibane. Ukongezwa kwe-alumina ye-dopants, i-silica, kunye ne-potassium kwinqanaba lokuxuba umgubo kuya kuguqula iimpawu zomatshini zocingo lwe-tungsten. Kwinkqubo yokutshiza okushushu kunye nokuzoba okushushu kwentambo ye-tungsten, i-alumina kunye ne-silica ngaphandle kwegesi kunye ne-potassium ihlala, inika ucingo iipropati zayo ezingaguqukiyo kunye nokwenza ukuba iibhalbhu ze-incandescent zisebenze ngaphandle kwe-arcing kunye nokusilela kwe-filament.
Ngelixa ukusetyenziswa kocingo lwe-tungsten namhlanje kwandiswe ngaphaya kwee-filaments kwizibane ze-incandescent, ukusetyenziswa kweedopants kwi-tungsten wire production kuyaqhubeka. Icutshungulwe ukuba ibe nobushushu obuphezulu be-recrystallization kunokuba ikwimeko yayo ecocekileyo, i-doped tungsten (kunye ne-molybdenum wire) inokuhlala i-ductile kwindawo yokushisa kunye nokushisa okuphezulu kakhulu. Ulwakhiwo olunesiphumo olude, olupakishiweyo lukwanika iipropati zocingo oludayiweyo ezifana nozinzo olulungileyo lwe-creep, kunye nokwenza lula kancinane kunemveliso esulungekileyo (engagqitywanga).

Ucingo lwe-Doped tungsten luqhele ukuveliswa ngokobukhulu ukusuka ngaphantsi kwe-0.001″ ukuya kuthi ga ku-0.025″ ububanzi kwaye lusasetyenziswa kwifilament yesibane kunye nokufakwa kwefilament yocingo, kunye nokuba luncedo kwi-oveni, ukubekwa, kunye nobushushu obuphezulu. Ukongeza, ezinye iinkampani (kubandakanya iMetal Cutting Corporation) zibonelela ngocingo olusulungekileyo, olungafakwanga lwe-tungsten kwizicelo apho ubunyulu bubaluleke kakhulu. Ngeli xesha, i-tungsten wire ecocekileyo ekhoyo yi-99.99% ecocekileyo, eyenziwe kwi-99.999% yomgubo ococekileyo.

Ngokungafaniyo neemveliso zocingo zentsimbi - ezinokuthi zi-odolwe kwi-1n ezahlukeneyo ezifakwe kwi-annealed states, ukusuka kubunzima obugcweleyo ukuya kuluhlu olubanzi lweemeko ezithambileyo zokugqibela - ucingo lwe-tungsten njengento ecocekileyo (kwaye ngaphandle kokukhetha okulinganiselwe kwe-alloys) ayinakuze ibe noluhlu olunjalo iipropati. Nangona kunjalo, ngenxa yokuba iinkqubo kunye nezixhobo zinokwahluka, iimpawu zomatshini we-tungsten kufuneka zihluke phakathi kwabavelisi, kuba akukho benzi babini abasebenzisa ubungakanani obufanayo bebha ecinezelweyo, izixhobo ezikhethekileyo zokujija, kunye neshedyuli yokuzoba kunye ne-annealing. Ke ngoko, iya kuba lithamsanqa elimangalisayo ukuba i-tungsten eyenziwe ziinkampani ezahlukeneyo ineempawu ezifanayo zoomatshini. Enyanisweni, zinokuhluka ukuya kuthi ga kwi-10%. Kodwa ukucela umenzi wocingo lwe-tungsten ukuba atshintshe amaxabiso akhe obunzima nge-50% akunakwenzeka.