Hunhu hweTungsten Wire

Muchimiro chewaya, tungsten inochengetedza akawanda ezvivakwa zvayo zvakakosha, kusanganisira nzvimbo yayo yakakwira yekunyungudika, yakaderera coefficient yekuwedzera kwekupisa, uye yakaderera mhute yekumanikidza pane yakakwirira tembiricha. Nekuti tungsten waya inoratidzawo kunaka kwemagetsi uye kupisa kwemhepo, inoshandiswa zvakanyanya pakuvhenekesa midziyo yemagetsi, uye thermocouples.
Madhayamita ewaya anowanzo kuratidzwa mumamirimita kana mils (zviuru zvemainchi). Zvisinei, tungsten waya dhayamita inowanzoratidzwa mumamirigiramu - 14.7 mg, 3.05 mg, 246.7 mg uye zvichingodaro. Tsika iyi yakatanga mazuva apo, pasina zvokushandisa pakuyera zvakarurama waya dzakatetepa zvikuru (.001″ kusvika .020″ mudhayamita), gungano raiva rokuyera huremu hwe200 mm (anenge 8″) hwetambo yetungsten uye kuverenga. iyo dhayamita (D) yetungsten waya zvichienderana nehuremu pahurefu hweyuniti, uchishandisa inotevera masvomhu fomula:

D = 0.71746 x square midzi (mg uremu/200 mm kureba)”

Iyo yakajairwa dhayamita kushivirira 1s士3% yehuremu kuyerwa, kunyangwe kushivirira kwakaomarara kunowanikwa, zvichienderana nekushandiswa kwechigadzirwa chewaya. Iyi nzira yekuratidza dhayamita inotorawo kuti waya ine dhayamita inoramba iripo, isina yakakosha va「1ation, kugova pasi, kana mamwe maitiro ane conical chero padhayamita.
Pawaya dzakakora (.020″ kusvika .250″ dhayamita), kuyerwa kwemamirimita kana mil kunoshandiswa; kushivirira kunoratidzwa sechikamu chedhayamita, neyakajairwa kushivirira kwe士1.5%
Yakawanda tungsten waya inodonhedzwa neinoteedzera huwandu hwe potassium inogadzira yakarebesa, yakavharira zviyo chimiro chinoburitsa zvisiri-sag zvivakwa mushure mekugadzirisa zvakare. Iyi tsika yakatanga kushandiswa kwetambo ye tungsten muma bulbs emwenje, apo tembiricha chena-inopisa yaizokonzera filament sag uye kutadza kwemwenje. Kuwedzerwa kwemadopants alumina, silica, uye potasium padanho rekusanganisa hupfu kwaizochinja ma mechanika ewaya ye tungsten. Muchiitiko chekupisa uye kupisa kudhirowa tungsten waya, iyo alumina uye silica kunze-gasi uye potassium inosara, ichipa waya iyo isiri-sag zvimiro uye kuita kuti incandescent bulbs ishande isina arcing uye filament kutadza.
Nepo kushandiswa kwetambo yetungsten nhasi kwawedzera kupfuura mafilaments emarambi emwenje, kushandiswa kwemadopants mukugadzira tungsten waya kunoenderera mberi. Yakagadziriswa kuti ive nepamusoro recrystallization tembiricha kupfuura kana iri muhuchena hwayo, doped tungsten (pamwe nemolybdenum wire) inogona kuramba iri ductile pane tembiricha yekamuri uye pakupisa kwakanyanya kwekushanda. Iyo inokonzeresa yakareba, yakarongedzerwa chimiro inopawo doped waya zvivakwa seyakanaka inokambaira kuramba dimensional kugadzikana, uye zvishoma nyore machining pane yakachena (isina kuvharwa) chigadzirwa.

Doped tungsten waya inogadzirwa muhukuru kubva pasi pe 0.001 ″ kusvika 0.025 ″ mudhayamita uye ichiri kushandiswa mwenje filament uye waya filament application, pamwe nekubatsira muovheni, deposition, uye yakakwirira-tembiricha maapplication. Uye zvakare, mamwe makambani (kusanganisira Metal Cutting Corporation) anopa yakachena, isina kuvharwa tungsten waya yemashandisirwo uko kuchena ndiko kwakakosha. Panguva ino, iyo yakachena tungsten waya inowanikwa ndeye 99.99% yakachena, yakagadzirwa kubva ku99.999% poda yakachena.

Kusiyana neyakaomeswa simbi simbi zvigadzirwa - izvo zvinogona kuodha 1n dzakasiyana annealed nyika, kubva kuzere kuomarara kusvika kune yakafara mamiriro akapfava ekupedzisira - tungsten waya sechinhu chakachena (uye kunze kwesarudzo shoma yealloys) haingambove nemhando yakadai properties. Nekudaro, nekuti maitiro nemidziyo inosiyana, michina ye tungsten inofanirwa kusiyana pakati pevagadziri, nekuti hapana vaviri vanogadzira vanoshandisa saizi yakadzvanywa yebha, chaiyo yekugezera midziyo, uye yekudhirowa uye annealing marongero. Naizvozvo, chingave chiitiko chine rombo rakanaka kana tungsten yakagadzirwa nemakambani akasiyana iine zvinhu zvakafanana zvemuchina. Muchokwadi, ivo vanogona kusiyanisa nekuwanda se10%. Asi kubvunza mugadziri wewaya ye tungsten kuti asiyanise hunhu hwayo hwega ne50% hazvigoneke.