The new process replaces time-consuming annealing processes and refines the microstructure. In addition to leaner production processes, users benefit from higher component quality.

Steel development together with customers - in line with requirements and taking into account the entire value chain: the concept of the new DEW RC+T process is exemplary of the way Deutsche Edelstahlwerke works. DEW will be presenting this new process to trade visitors at Wire: Together with cold formers, the special steel manufacturer has developed a solution to make the production of rotationally symmetrical components (e.g. drive shafts) more competitive. After all, conventional manufacturing processes are very time-consuming, which is at the expense of quality.

This is because the material is usually subjected to annealing processes lasting eight to 24 hours in order to achieve the necessary formability. This time can have a negative effect on the surface quality and straightness. In order to achieve the optimum properties of the steel for case hardening, extensive post-treatment of the steel product is therefore required. Only in this way can the desired case hardening depth in the edge area and a tough core be precisely set.

DEW technology refines microstructure

Deutsche Edelstahlwerke takes a different approach: Thanks to DEW RC+T, conventional annealing on ferrite-pearlite microstructure or on spheroidal cementite (GKZ annealing) and, accordingly, downstream straightening processes and surface treatments are no longer required. By integrating conventional heat treatment into the rolling process, Deutsche Edelstahlwerke also homogenizes and refines the microstructure to grain size 5 and finer (in accordance with ISO 643). The microstructure is therefore significantly less warped and easier to form than conventionally produced case-hardening steels. This means that the material can be processed directly and efficiently by the cold former. The mechanical-technological material properties are homogeneous and therefore also meet the requirements for case hardening. Users of DEW RC+T-treated case-hardening steel benefit from shorter throughput times and significant savings in energy and_CO2.

Wire, Hall 13, Stand A71