Lub nplhaib yog quenching + tempering. Covforged-ringyog rhuab mus rau qhov tsim nyog kub (quenching kub 850 ℃, tempering kub 590 ℃) thiab khaws cia rau ib lub sij hawm, thiab ces immersed nyob rau hauv nruab nrab kom sai txias.

50 c8 Ntiv -Forging quenching.