Refractory Metals. Basic ruzivo pamusoro tungsten.

Refractory nesimbi - muchidimbu

Kazhinji, kumbotaura "nesimbi refractory" kunzwisiswa achaita kuti idzi simbi dzine refu kwazvo utsotso tembiricha, zvinogona kusvika 4000 ° C. Molybdenum, tantalum, tungsten, niobium uye rhenium - dzinokosha refractory simbi. Uyewo Pamazita ichi inogona kuwedzerwa, uye vamwe - chromium, vanadium, osmium, hafnium, uye zirconium nesimbi, utsotso tembiricha rinosvika 2123 ° C.

Refractory nesimbi unofadza nokuda ehupfumi dzavo. Saka, Somuenzaniso, zviratidzo zviri molybdenum uye tungsten neukukutu dzinoita kushandiswa simbi idzi nokuda kupisa kurapwa nezvinhu pasi Vacuum. Products akaita zvimwe refractory nesimbi dzakasiyana ehupfumi, semuenzaniso, tungsten filaments akaramba filament tembiricha kuti 3073 ° C.

Asi kurwisa kwakaita refractory nesimbi zvinogona kunzi dzavo huru payakaipira. Contact pamwe okisijeni yekudyidzana yakafurira pamusoro chafariz ehupfumi ose refractory simbi. Ichi ndicho chikonzero kushandiswa nesimbi iri boka iri - mune mhoteredzo inogona voga zvachose kubva mumhepo.

Tungsten - hwaro refractory nesimbi iri simbi

Tungsten ndomumwe chinonyanya refractory simbi. Utsotso pfungwa tungsten riri kupfuura vamwe, tungsten - rinorema simbi, zvinokwanisika kuti vaswedere shinda yakanaka, zviri zvakakwana weldable. Tungsten haiwanzowaniki simbi, tigutsikane yaro goko rinosvika 0,0055 chete%, akashaikwa iri gwenya chakarondedzera uye hazvisi aripo ari yomugungwa. Asi ayo kukurumbira hakusi muduku simbi zvishoma isingawanzowanikwi simbi.

Kushandiswa tungsten

Metallic tungsten kushandiswa mukugadzira filament pemavara, iyo inoshandiswa mune chiedza mano sechipiriso kudziyisa Kufananidzira - mu Vacuum yamavira nemishonga. Yakakwirira arambe achirema pamusoro tungsten rinobvumira kushandiswa simbi iyi ive counterweight nokuda projectiles zvakasiyana. Sezvo tungsten electrode yaishandiswa panguva TIG nomoto. In yakasimba alloys ose tungsten carbide zvinoshandiswa sezvo filler.

Tungsten sezvo molybdenum, uye tantalum rinoshandiswa senzira mutemo ari alloys, ayo anoshandiswa zvikamu nzvimbo renyukireya rwokugadzira. Kukwanisa kutsungirira yakakwirira chaizvo kutonhora - chinangwa chikuru iro alloys izvi zvakasikwa.