Tungsten carbide. The jiki Properties, yawan guba, da yin amfani da

Tungsten carbide (wani sunan - tungsten monocarbide) - a sinadaran fili na tungsten, carbon, da tukwane. Wannan abu ne daya daga cikin karfi na duk aka sani tukwane da taurin m zuwa lu'u-lu'u: HRC ne a kusa da 90 raka'a kan Mohs Mohs bautarka tara wuri. Wani kyau siffa daga cikin tungsten carbide ne mai kyau lalacewa juriya, high narkewa zafin jiki da kuma kyau kwarai da juriya ga hadawan abu da iskar shaka. Wannan abu ne yanzu yadu amfani don ƙirƙirar wani sabon kayan aiki core da makamai-sokin bawo.

Jiki Properties na tungsten carbide

1. A karkashin al'ada yanayi, wani granular tungsten carbide foda ne mai launin toka ƙarfe Sheen.

2. narkewa a cikin ruwa.

3. Rockwell taurin daga 87 zuwa 92 raka'a.

4. The narkewa zafin jiki na tungsten carbide ne 2.870 digiri.

5. The yawa ne 15.8 g / santimetr³.

6. The na roba modulus ne 450 ÷ 650 GPA

7. Effect zafi daidai 8.4 +/- 0.2 kkalory / mol

8. The entropy misali ne 8.5 +/- 1.5 da adadin kuzari / (mole da digiri).

9. The takamaiman kadan a zazzabi daidai to 293 digiri ne 8,53 da adadin kuzari / (mole da digiri).

10. thermal watsin a yanayi zazzabi na 25 digiri ne 0,07 kirawo / (cm / s / ° C).

11. The thermal fadada coefficient ne 3,84 (3,9) * 106 1 deg.

12. The lantarki resistivity a zazzabi na 200 digiri ne 19,2 +/- 0.3 microohm / cm.

13. The lantarki watsin na musamman ne 52200 Ohm-1 * cm-1.

Structure tungsten carbide

A halin yanzu da aka sani biyu siffofin WC - β-WC high-cubic da kuma kyakkyawan α-WC.

Amfani da tungsten carbide

- a cikin art ga yi na kayan aikin da dole ne high taurin da kyau lalata juriya;

- ga lalacewa-resistant surfacing na sassa daban daban da za a sarrafa a nauyi lalacewa to da talakawan buga lodi.

- yadu a yi amfani da sarrafa daga daban-daban sabon kayan aikin, drills, nika ƙafafun, rawar soja ragowa ga hakowa, milling da kuma sauran kayan aikin sabon;

- kudin tungsten damar yin amfani da gami a fannoni daban daban. (Shi ne hada da wuya gami, da aka sani a karkashin sunan "Nasara" da "Relit", game da 90%).

- yi amfani a thermal spraying da surfacing a cikin wani nau'i na foda abu don samar da abrasion-resistant coatings.

- shi ne daya daga cikin kayayyakin amfani don maye gurbin chromium plating aiwatar electroplating a high-gudun harshen spraying.

- a halin yanzu tungsten carbide ne marinjãya a cikin yi na projectiles da makamai sokin harsasai tsakiya (duk da haka, akwai wani hali na sauka a hankali hijirar na tungsten carbide du) .

- a samar da matsananci beads na 1 mm for ballpoint alƙalumansu (polishing da aka yi a wani na musamman inji ga dama, kwanaki, ta amfani da kananan adadin lu'u-lu'u manna).

- a yi, daga mundãye na Elite Swiss Watches, kayan ado - zobba, mundaye kuma rataye-rataye, wanda saboda da lalacewa juriya na tungsten carbide tabbas madawwami luster.

- yi amfani a matsayin mai jigilar kaya don a platinum mai kara kuzari;

- tungsten carbide amfani ga Ya halitta karshen like shafts wasu sunadaran a lokuta inda yanayi yana da wani high danko da kuma / ko abrasiveness.

Tungsten carbide yawan guba

Wannan abu ne chemically inert. A saboda wannan dalili, a al'ada yanayi, shi ba ya haifar da wani hatsari ga mutane. A kashi na mutuwa ba a tsare ko dai don mutane ko dabbobi. Nazarin da aka gudanar a Dresden fasaha da kuma University of Leipzig, ya nuna cewa fesa tungsten carbide iya shiga cikin rayayyun kwayoyin halitta. Cikinsa lafiya barbashi ne da ba mai guba, amma a lokacin da a hade tare da wasu abubuwa da suka qumshi wani hatsari ga wellbeing na Kwayoyin. Lokacin da bashi samun cobalt turɓãya da muna la'akari da dũkiyõyinsu a cikin jiki zai iya ci gaba fibrosis.