When the ball mill ball is loaded with a slight relative slip, the temperature of the contact surface of the ball mill fitting increases and the oxidation speeds up. It is known from experiments that most of the energy released during fretting wear is consumed in the form of heat.
Fatigue cracks often occur in the fretting wear zone of ball mill balls. However, since the contact stress is only generated in the superficial layer of the wear surface of the ball mill ball, these cracks generally do not expand, but only pitting or superficial peeling occurs on the surface of the ball mill ball. Cracks are also likely to expand under heavy loads, or when the micro-amplitude is high enough.
The fretting wear of the ball mill ball is a wear phenomenon that is completely eliminated under difficult conditions. But taking measures can reduce the degree of wear. Reduce the micro-motion contact area; the ball mill ball is changed to the whole structure; the contact part is hardened (increasing the surface hardness and the surface layer is under compressive stress); the ball mill finish of the ball mill; the surface is sprayed with hard metal; the surface of the steel is boronized and infiltrated Chromium, vanadium, carburizing, nitriding; increase the contact stress of the ball of the ball mill or increase the friction between the contact surfaces; add a material with a higher elastic strain limit to the contact surface of the ball of the ball mill to absorb the fretting amplitude, Measures to prevent fretting wear of the ball mill ball.
Fatigue cracks often occur in the fretting wear zone of ball mill balls. However, since the contact stress is only generated in the superficial layer of the wear surface of the ball mill ball, these cracks generally do not expand, but only pitting or superficial peeling occurs on the surface of the ball mill ball. Cracks are also likely to expand under heavy loads, or when the micro-amplitude is high enough.
The fretting wear of the ball mill ball is a wear phenomenon that is completely eliminated under difficult conditions. But taking measures can reduce the degree of wear. Reduce the micro-motion contact area; the ball mill ball is changed to the whole structure; the contact part is hardened (increasing the surface hardness and the surface layer is under compressive stress); the ball mill finish of the ball mill; the surface is sprayed with hard metal; the surface of the steel is boronized and infiltrated Chromium, vanadium, carburizing, nitriding; increase the contact stress of the ball of the ball mill or increase the friction between the contact surfaces; add a material with a higher elastic strain limit to the contact surface of the ball of the ball mill to absorb the fretting amplitude, Measures to prevent fretting wear of the ball mill ball.
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