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Operating requirements for tungsten carbide roll rings
Oct 31, 2018

Cemented carbide roll ring is a kind of tool material which consists of tungsten carbide and cobalt with high hardness and wear resistance. To take advantage of high wear resistance, long life and high efficiency of cemented carbide roll rings during the high speed rolling, attention should be paid as follows when purchasing and using cemented carbide roll rings.

 

Grade

An overall understanding of the properties of cemented carbide grades is a basis for correctly selecting the grades for roll rings used in the stands of rolling mills and an optimal combination of grades is required for the various stands of rolling mills.

 

Installation

Sleeves mounting and assembly of roll rings should be strictly performed according to the precision required by the design process. Proper fitting is needed for the roll rings, roll mandrel for stands and conical sleeve, which cannot be too tight or too loose. When it is too tight, the roll rings are in a tensile state and more fluctuation of rolling force will make the roll rings break. When it too loose, it causes the roll rings, roll mandrel and conical sleeve to sliderelatively during rolling, which scratches conical sleeves and roll mandrel resulting in cracks. Before running in the mill make a check if the roll ring meets the needs and roll ring, the assembling faces of the conical sleeve and the roll mandrel need to be cleaned. It is forbidden to knock at the roll rings with a hammer or other hard materials when running the mill. It is forbidden for the roll rings to impact each other during the transportation and installation to prevent roll rings from damage.


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