Tungsten carbide. Zvinooneka ehupfumi, toxicity, kushandiswa

Tungsten carbide (rimwe zita - tungsten monocarbide) - makemikari remubatanidzwa wenyika tungsten, carbon, uye Ceramics. fuma iyi ndeimwe yakasimba ose anozivikanwa Ceramics pamwe pokuoma akafanana nedhaimani: HRC ari kumativi 90 inokwana zviyero musi Mohs Mohs inoremekedzwa rechipfumbamwe nzvimbo. Chimwe chinhu chakanaka pamusoro tungsten carbide wakanaka vapfeke nemishonga, mukuru utsotso tembiricha uye chakanakisisa kuramba oxidation. Izvi zvinhu zvino kushandiswa nevakawanda kusika munhu nokuveza mudziyo chinoumba uye dzokurwa rinobaya anoshongwa.

ehupfumi zvokunyama tungsten carbide

1. Pasi kwomuzvarirwo ezvinhu, imwe granular tungsten carbide upfu chinhu pfumbu esimbi Sheen.

2. Soluble mumvura.

3. Rockwell neukukutu kubva 87 kusvika 92 dzakabatana.

4. utsotso tembiricha kuti tungsten carbide ndiyo 2.870 inegumi.

5. The arambe achirema ndiyo 15.8 g / santimetr³.

6. kwakavharwa nenyama modulus iri 450 ÷ 650 GPA

7. Zvinoitwa kupisa zvakaenzana 8.4 +/- 0.2 kkalory / mol

8. entropy mwero iri 8.5 +/- 1.5 macalorie / (nhuta pa dhigirii).

9. yakananga Kupisa ari tembiricha akaenzana 293 madhigirii ndiyo 8,53 macalorie / (nhuta pa dhigirii).

10. Thermal conductivity panguva ambient tembiricha 25 madhigirii ndiyo 0,07 Cal / (masendimita / s / ° C).

11. The chafariz kuwedzera coefficient ndiyo 3,84 (3,9) * 106 1 wakaporesa.

12. The zvemagetsi resistivity ari tembiricha rworwendo 200 ndiyo 19.2 +/- 0.3 microohm / cm.

13. The zvemagetsi conductivity maduramazwi ndiwo 52200 Ohm-1 * masendimita-1.

Mamiriro tungsten carbide

The Pari anozivikanwa zvimiro zviviri WC - β-WC mukuru-cubic uye hexagonal α-WC.

Kushandisa tungsten carbide

- iri uri kuti kugadzirwa zvekushandisa zvinofanira kuva mukuru kwoukukutu uye yakanaka ngura kuramba;

- nokuti kusakara nemishonga dzichiuya dzakasiyana zvikamu kuti kushanda mu inorema kusakara kuti avhareji kuvhunduka mitoro;

- zvinowanzoshandiswa anogadzira zvinhu siyana nokuveza maturusi, drills, nokuikuya mavhiri, chibooreso matomu kuti kuchera, azvikuya nezvimwe nokuveza Ezvemutauro;

- mari tungsten rinobvumira kushandiswa alloys muminda siyana (izvozvo rinoumbwa zvakaoma alloys, anozivikanwa pasi zita "Victory" uye "Relit", anenge 90%);

- akashandiswa chafariz spraying uye dzichiuya muchimiro upfu zvinhu hwokubereka abrasion nemishonga coatings;

- mumwe zvakashandiswa kutsiviwa chromium yakanamirwa pamifananidzo mutoo electroplating mukuru-nokukurumidza murazvo spraying;

- Pari tungsten carbide ndihwo ari zvaAtemisi projectiles uye nezvombo rinobaya mabara cores (Zvisinei, pane Vanzveri nezvishoma misha yose tungsten carbide Du) ;

- kweShanduro Ultra marozari 1 mm kuti ballpoint matanga (pakuonekwa rinoitwa rinokosha midziyo kwemazuva, uchishandisa shoma nedhaimani namatidza);

- in zvaAtemisi zvamaoko kuti aigona wachi Swiss, zvishongo - nezvindori, nezvishongo uye pendants, izvo nokuda kusakara nemishonga yose tungsten carbide kwakagonesa kubwinya kusingaperi;

- senzira mutakuri nokuda Platinum tiwedzere;

- tungsten carbide akashandisa kusika kuguma zvisimbiso miseve dzimwe nzira dziri zviitiko apo zvakatipoteredza ine mukuru viscosity uye / kana abrasiveness.

Tungsten carbide Toxicity

Izvi zvinhu ndiyo mishonga inert. Nokuda kwechikonzero ichi, chaiye ezvinhu, hazvina kuipa chero ngozi kuvanhu. Inouraya dose haisi kunorondedzerwa kana vanhu kana kuti mhuka. Studies kuti vave inoitwa panguva kuDresden Technical uye University of Leipzig, akaratidza kuti sprayed tungsten carbide anogona kupinda mu zvipenyu. Pakazoti nezvimedu akanaka vari dzisiri chepfu, asi kana pamwe zvimwe zvinhu idzowo ngozi nokuda KWAHWO masero. Kana chikwereti anowana cobalt guruva uye tiri kufunga fuma mumuviri zvinogona kuva fibrosis.