carburize
🇺🇸
/ˈkɑːrbəraɪz/
🇬🇧
/ˈkɑːbjəraɪz/
To increase the carbon content in iron or steel to make it harder on the surface.
The mechanic had to carburize the engine parts to improve their durability.
机械师必须为引擎部件进行渗碳处理,以提高其耐久性。