Izinsimbi Refractory. ulwazi oluyisisekelo mayelana tungsten.

izinsimbi Refractory - ekuhlaziyeni

Ngokuvamile, ekhuluma "izinsimbi refractory" kuyothathwa kuqondwe ukuthi lawa izinsimbi abe ukuncibilika lokushisa eliphezulu kakhulu, kungase sifinyelele 4000 ° C. Molybdenum, tantalum, tungsten niobium futhi rhenium - izinsimbi refractory eziyisisekelo. Futhi kulolu hlu kungenziwa wanezela, nabanye - chromium, vanadium, osmium, hafnium, futhi zirconium izinsimbi, izinga lokushisa ukuncibilika ifinyelela 2123 ° C.

izinsimbi Refractory ezithakazelisa awo okwelapha. Ngakho, ngokwesibonelo, izinkomba molybdenum futhi tungsten ubulukhuni unike amandla ukusetshenziswa kwalezi izinsimbi for ekwelapheni ukushisa materials ngaphansi cleaner. Imikhiqizo ezenziwe abanye izinsimbi refractory babe izakhiwo esiyingqayizivele, isib, tungsten sesigcilikisha zigcinwe intambo lokushisa ukuze 3073 ° C.

Kodwa ukumelana izinsimbi refractory akunakubangelwa nemibi zabo eziyinhloko. Zihlangana nomoya-mpilo kakhulu inomthelela phezu izakhiwo ezishisayo of izinsimbi refractory. Lesi ngiso sizatfu sekufa ukusetshenziswa izinsimbi kuleli qembu - endaweni lapho bangakwazi bodwa ngokuphelele emoyeni.

Tungsten - ngesisekelo izinsimbi refractory e yokusansimbi

Tungsten ingenye insimbi refractory kakhulu. Iphuzu ukuncibilika tungsten ingaphezu kwe-ukuphumula, tungsten - rock onesigqi esinamandla, kungenzeka ukudweba imicu emihle, ibuye Weldable kahle. Tungsten kuyinto metal ezingavamile, nokuqukethwe kwalo ku uqweqwe ifinyelela% 0,0055 kuphela, kodwa alutholakalanga e bohlu elanga futhi akusiyo ekhona amanzi asolwandle. Kodwa ngenxa yokuthandwa kwayo akuyona wawungaphansi metal izinsimbi kancane ezingavamile.

Ukusetshenziswa tungsten

tungsten Metallic esetshenziselwa yokukhiqiza intambo lokuluhlaza, ezisetshenziswa amadivaysi ukukhanyisa njengoba Ukushisa element - e cleaner amaziko ukumelana. I okusezingeni eliphezulu kwabantu tungsten evumela ukusetshenziswa kwalesi metal njengoba counterweight ngoba projectiles ezahlukene. Njengoba electrode tungsten esetshenziswa ngesikhathi TIG Welding. Esikhathini Alloys okuqinile of tungsten Carbide ezisetshenziswa njengeziwusizo yamathebhu.

Tungsten njengoba molybdenum, futhi tantalum isetshenziswa njengoba umthetho kule Alloys, ezisetshenziswa izingxenye isikhala ubuchwepheshe zenuzi. Ikhono ukumelana okushisa aphezulu kakhulu - injongo eyinhloko okuyiwona lezi Alloys zadalwa.