Valsningsteknik för extremt höghållfasta tunna stål
New high strength steels require improved cold rolling techniques. The aim of this degree project was to develop a new and money saving cold rolling technique to manufacture steel strip for saw blades. The work is based on earlier rolling experiments made with a high carbon steel grade at LuCoil Steel AB. The work also focused on the mill requirements to cold roll high strength steels. The results show that LuCoil?s existing cold rolling mill was actually designed for rolling low carbon steel. To roll high strength steels the mill must be upgraded with a pair of shapemeters, more coiler torque and force enough to shift the 1st intermediate rolls during rolling. During the rolling experiments a right rolling technique to produce strip with the right properties and without strip breakage wasn?t found. The reason for this is probably small micro cracks in the strip caused by excessive reduction. More rolling experiments and material investigations are necessary.