Ọrụ oyi na-anwụ anwụ nchara na-abụkarị ihe mejupụtara carbon dị elu iji gboo mkpa nke ịdị elu dị elu na nguzogide elu.Ọ bụrụ na iji melite mmetụta nkwụsị nke ebu, mgbe siri ike chọrọ ka ọ dịkwuo elu, enwere ike ịhọrọ ígwè carbon na-acha ọkụ, na ọrụ ọkụ na-anwụ anwụ nwere ike iji kama.
Ihe:9SiCr,9CrWMn,CrWMn,Cr2,9Cr2Mo,7CrSiMnMoV,8Cr2MnWMoVS,Cr2Mn2SiWMoV.
Suface:Ihe osise dị ọcha/ojii siri ike/egweri/egwe ihe wdg.
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