Precision Stainless Steel Flywheel CNC Machining

When the temperature of the core part increases and expands after the forging is through the heat, the forging part shows volume expansion; when the workpiece is cooled, the surface layer cools faster than the core part, and the surface layer shrinks. The high temperature of the core part prevents shrinkage and generates tensile stress on the surface layer. , The heart produces compressive stress. When it is cooled to a certain temperature, the surface layer will no longer shrink by cold hardening, and the core will shrink due to continued cooling. At this time, the surface layer is under compressive stress, while the core is under tensile stress. After cooling, this stress still exists inside the forging, which is called residual stress.

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