Non-Weldable to weldable (N2W) is a novel method for connecting non-weldable cemented carbide or other wear materials to less wear resistant but weldable and ductile materials such as steels, stainless steels, or nickel base alloys. Basically, friction stir welding (FSW) is used to join a non-weldable but highly wear resistant material by FSW to a weldable material, e.g., a steel insert positioned within the wear resistant material, creating asubassembly that can subsequently be friction stir welded to the final structure. This unique joining process offers a relatively low temperature solution for fabricating an essentially composite structure without degrading mechanical properties of the primary structural component. If joined by conventional means, such as brazing, it would be necessary to heatthe entire structure to the braze temperature. This can be both costly, and potentially degrade properties of the primary structure.
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