Hardening Depth
Hardness depth is the area in a workpiece up to which a defined minimum hardness is achieved. It depends on the hardening method and the materials involved.
Physical-Chemical Mechanism of Action
Hardness depth refers to the depth in a workpiece up to which a defined minimum hardness is achieved. This happens through thermal or chemical processes that change the material's crystal structure, thus improving its mechanical properties.
Metallurgical Relevance & Welding Risks
Insufficient hardness depth can lead to low strength and toughness, making the workpiece prone to cracks under load. Excessive hardness depth can cause brittle edges or hot cracks, especially if the material isn't cooled properly.
Workshop Practice & Action Items
To control hardness depth, strictly follow the hardening methods and times. For thermal hardening, make sure the workpiece cools slowly (often in a furnace) to ensure uniform hardness distribution. For chemical hardening, the concentration and exposure time of the hardening agent must be precisely set to achieve the desired minimum hardness.