الإنجليزية - الإنجليزية
تعريف selfhardening في الإنجليزية الإنجليزية القاموس.
- Designating, or pert
- They are chiefly used as high-speed steels
- to, any of various steels that harden when heated to above a red heat and cooled in air, usually in a blast of cold air with moderate rapidity, without quenching
- Such steels are alloys of iron and carbon with manganese, tungsten and manganese, chromium, molybdenum and manganese, etc