I-tungsten carbide. Izakhiwo zomzimba, ubuthi, isicelo

I-tungsten carbide (eyaziwa nangokuthi i-tungsten monocarbide) iyinhlanganisela yamakhemikhali e-tungsten, carbon, ne-ceramics. Lesi sici singesinye seziqhingi eziqine kakhulu kunazo zonke, ubulukhuni obufana nedayimani: i-HRC ingamayunithi angama-90, ngokusho kwe-Mohs mineralogical scale yindawo yesishiyagalolunye. Esinye isici esihle se-tungsten carbide ukuphika okuhle kokugqoka, iphuzu eliphakeme lokuqhaqhazela nokuphikisana okunamandla kwikhodi. Lesi sakhi okwamanje sisetshenziselwa ukudala ithuluzi lokusika kanye nezinhlamvu zamabolondo okubhoboza izikhali.

Izakhiwo zomzimba we-tungsten carbide

1. Ngaphansi kwezimo ezivamile, i-tungsten carbide granular iwu-powder wombala ompunga nge-metallic reflection.

2. Sungula ngamanzi.

3. Ubunzima be-Rockwell buvela kuma-87 kuya ku-92 amayunithi.

4. I-tungsten carbide iphuzu lokuqhakazila lingama-2870 degrees.

5. Ubuningi bayizi-15.8 g / cm3.

6. I-modulus ye-elasticity yi-450 ÷ 650 GPa

7. Umphumela oshisayo u-8.4 +/- 0.2 kcal / imvukuzane

8. I-entropy yezinga elingu-8.5 +/- 1.5 kilojoule / (isilwane ngesichotho ngesichotho).

9. Ukushisa komzimba ekushiseni okulingana nama-293 degrees ayi-8.53 kilojoule / (i-moleyula ngesichotho).

10. Ukuqhuba kwe-thermal ngokushisa okuphansi kwama-degree angu-25 kungu-0.07 cal / (centimeter / s / degree).

11. I-coefficient yokwandisa okushisa yi-3.84 (3.9) × 106 deg-1.

12. Ukumelana kagesi ekushiseni kwama-degrees angu-200 ku-19.2 +/- 0.3 microohm / cmenti.

13. Ukuqhutshwa komshini kagesi kungama-52200 Ohm-1 * centimeter-1.

Ukwakhiwa kwe-tungsten carbide

Njengamanje amafomu amabili eWC ayaziwa - β-WC high-lokushisa cubic kanye α-WC hexagonal.

Ukusetshenziswa kwe-tungsten carbide

- inqubo yokwenza amathuluzi okumelwe abe nokuqina okuphezulu nokumelana nokuqina kokubola;

- ukuvuvukala okungaxilwanga kwezinxenye ezihlukahlukene ezizosetshenziswa ezimweni zokugqoka okujulile nemithwalo yemithwalo ephakathi;

- ukusetshenziswa okubanzi ekukhiqizeni izinsimbi ezihlukahlukene, ama-drill, ama-disks abrasive, bits for drilling, cutting milling kanye nezinye amathuluzi wokusika;

- Izindleko ze-tungsten zenza kube lula ukusebenzisa ama-alloys alo ezindaweni ezihlukahlukene (kubumbano lwezinhlamvu ezinzima ezaziwa ngaphansi kwamagama athi "Ukuwina" no "Relit," okungaba ngu-90%);

- esetshenziselwa ukuqhuma nokushisa okwenziwe ngegesi njengendlela yokwakheka kwe-powder ekwakheni izembatho ezingagangeki;

- lokhu kungenye yezinto ezisetshenziselwa ukufaka inqubo ye-chromium plating ngokusebenzisa i-gas-flame esheshayo ukupuniza;

- Njengamanje, i-tungsten carbide iyona eyinhloko ekukhiqizeni amagobolondo nezinhlamvu zezingqimba zokubhoboza izikhali (noma kunjalo, kukhona ukuthambekela kokuhamba kancane kancane kwe-tungsten carbide ne -uranium esephelile) ;

- ekukhiqizeni amabhola anzima kakhulu ngobukhulu obuyi-1 mm ngamapenki e-ball-point (ukupolisa kwenziwa esikhwameni esithile esikhethekile izinsuku eziningana besebenzisa inani elincane lokunamathisela idayimani);

- ekwakhiweni kwamasongo okubuka ama-Swiss elite, amabhlocwe - izindandatho, amasongo namakhuphoni, okubangelwa ukumelana nokugqoka kwe-tungsten carbide kuqinisekisiwe ukukhanya okuphakade;

- isetshenziswe njenge-substrate ye-catalyst eyenziwe nge-platinum;

- I-Tungsten carbide isetshenziselwa ukwakha ama-shafts seal shafts ezinkambweni ezithile kulawo mazwe lapho imvelo ine-viscosity ephezulu kanye / noma yokuyeka.

Ubuthi be-tungsten carbide

Lesi sici sinomswakama wekhemikhali. Ngenxa yalesi sizathu, ngaphansi kwezimo ezivamile, ayikho ingozi kubantu. Umthamo obulalayo awunqunyelwe abantu noma izilwane. Ucwaningo olwenziwe eDresden Technical University naseYunivesithi yaseLeipzig lubonise ukuthi uthuli lwe-tungsten carbide lungangena eziphilayo. Ngesikhathi esifanayo, izinhlayiya ezinhle azizona ezinobuthi, kepha uma zihlangene nezinye izinto zibeka ingozi emangqamuzaneni. Uma sibheke uthuli lwama-cobalt eside kanye nensimbi esiyicabangayo, i-fibrosis ingahlakulela emzimbeni.