Ceramic rolls for rolling of steel foils
DOI:
https://doi.org/10.5937/zasmat2301048GKeywords:
work rolls, flattening, strain-hardened steel, silicon nitride, Sendzimir millAbstract
High hardening of the steel, which is caused by martensitic transformation through cold forming, leads to significant local elastic roll deformation (flattening). The rolling of strain-hardened steel requires higher rolling forces and higher torques, which result in high rolling force. Roll flattening can be reduced by using rolls made of a material with a significantly higher modulus of elasticity. The suitability of ceramic materials for the rolls of modern cold and hot rolling mills was examined. The rolling tests with silicon nitride rolls were carried out with a two-high rolling stand with coilers. The industrial applications of silicon nitride rolls in the rolling of thin steel foils in a 20-high Sendzimir mill consistently showed excellent applicability of this material. A review of conducted research has shown that the use of silicon nitride work rolls minimizes roll flattening and leads to a significant reduction in rolling force.References
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