Qalabka kala duwan ee baararka dharbaaxadu waxay ku xiran yihiin baararka dharbaaxada laftooda, kuwaas oo laga yaabo inay ka samaysan yihiin birta manganese, birta qaab dhismeedka martensitic ( birta martensitic ), birta chrome, ama walxaha matrixka birta (MMC, sida dhoobada).MMC-yadu waxay ka kooban yihiin noocyo kala duwan oo bir ah iyo noocyo gaar ah oo cera ah ...
Akhri wax dheeraad ah