Surface Heat Treatment
2021-01-25
Surface heat treatment
Surface Heat Treatment
Metal heat treatment is a process that alters the surface mechanical properties of steel components through controlled heating and cooling. Surface hardening, which is a key component of surface heat treatment, aims to achieve a highly hardened surface layer along with an optimal distribution of residual stresses, thereby enhancing the wear resistance and fatigue strength of the workpiece.
A metal heat treatment process used to strengthen the surface of workpieces. It does not alter the microstructure or properties of the part's core. This process is widely applied to components that require both high surface wear resistance, fatigue strength, and excellent impact resistance, as well as good overall ductility and toughness—such as crankshafts, camshafts, and transmission gears. Surface heat treatments are broadly categorized into two main types: surface hardening and chemical heat treatment.
Surface heat treatment involves heating the steel's surface, followed by controlled cooling to alter the mechanical properties of the metal—this is known as the heat treatment process. Surface hardening is the primary focus of surface heat treatment, aiming to achieve a high-hardness surface layer along with an optimal stress distribution. This process ultimately enhances the wear resistance and fatigue performance of the workpiece.
It is a metal heat treatment process designed to enhance the surface of the workpiece. Importantly, it does not alter the microstructure or mechanical properties of the workpiece's core section. This process is widely used for components where the surface requires high wear resistance, fatigue strength, and the ability to withstand significant impact loads—while the material as a whole must also exhibit excellent ductility and toughness. Examples include crankshafts, camshafts, and transmission gears.
Surface heat treatment is divided into two categories: surface hardening and chemical treatment.
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2025-09-17