Selection of rolling die material

Selection of rolling die material

The most important characteristics in choosing a rolling die material are the hardness, toughness and wear resistance of the die steel. It must have sufficient hardness and toughness so that the mold can withstand the forces acting on it in use; good wear resistance is also necessary, because the main reason for removing the thread rolling die from use is due to the thread on the die. The peaks of the thread are worn so that the rolled thread no longer meets the requirements of external dimensions or functions, and cannot be used any longer.

The performance of the thread rolling dies mold is measured by the number of qualified parts produced. It is not only related to the mechanical properties of the mold material, but also related to (1) the hardness, size and shape accuracy of the blank to be rolled; (2) (3) Whether the mold is plate-type or circular; (4) The accuracy of mold assembly; (5) The inherent precision of the thread rolling machine; (6) The design of the thread at the entrance of the mold; (7) Rolling Speed; (8) The number of revolutions required for rolling each blank; (9) The surface condition of the material to be processed (the surface of the blank should be free of oxidation, peeling or other unwanted surface layers, such as inappropriate surface carburization) related.