The article presents the way of improving usable properties of cast irons by producing titanate coats in founding process, introducing titanium insert directly before pouring molten metal. It is presented an innovative way to use 3D technology applying SLS method in order to obtain local reinforcement of cast iron. The object of studies was a material consisting of two fundamental parts: bearing part - cast iron, and working part represented by titanic modular insert. The article presents detailed geometry of the insert as well as the micro observation on light and scaning microscope. In addition, micro analysis and mapping of the permanent joints between two materials was executed, and also microhardness and wear resistance were examinated. On the basic of obtained results, the presence of titanium carbides on the boundry cast iron- titanium insert was affirmed. Their dimensions and distribution were irregular in the volume of the material. Moreover, a local reinforcement of examinated material was observed, as evidence by increase of wear resistance and microhardness compared to basic material.Keywords: grey cast iron; 3D printing insert; titanium; hardness; abrasive wear resistance
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