Cause of tungsten carbide ring rolls failure:During the rolling process, the hot-rolled part is in contact with the surface of the groove, which is because the surface temperature of the roll is less increased, and compressive stress is generated on the surface temperature of the roll; on the contrary, when the surface layer of the roll is quenched by the cooling water, the surface metal shrinks, and The deep metal shrinkage is not as large as the surface metal, which will produce a tensile stress on the surface metal. This repeated alternating thermal stress is prone to thermal fatigue cracks, resulting in nail-like microcracks and cracks at the bottom of the groove.
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