Wave strain hardening in combined and additive technologies

To ensure the operational properties of machine parts in the technological processes of their manufacturing, use of hardening operations is necessary. The method of wave strain hardening has wide technological possibilities and allows forming a large depth of the modified layer with various uniformity of strengthening. Wave strain hardening is one of the methods that helps to enhance the potential of other hardening technologies, with which it is used in combined strengthening. The paper considers the results of studies of the combined technology, including preliminary wave strain hardening and subsequent thermochemical treatment (cementation). It was found that the use of such treatment increases the durability under the action of contact-fatigue loads by up to 2.5 times. The paper considers the results of studies of the combined technology, including preliminary wave strain hardening and subsequent heat treatment. It was found that the use of such technology increases the abrasive wear resistance up to 16% in creating a uniformly modified structure, and the fatigue life up to 60% or more in creating a heterogeneously modified structure. The paper considers the results of studies of the use of wave strain hardening in additive technologies to improve the strength characteristics of the synthesized metallic material. It was found that the mechanical properties of samples obtained using wave strain hardening can be increased up to 2.5 times regarding similar properties of rolled products made from the same grade of material. The obtained study results can be used not only for hardening critical machine parts at the final stages of their manufacturing, but also in additive technologies for producing parts.