Research on Improvement of TiAlN Coating on Tribological properties of Miniature Inner Grooved Copper Tubes Drawing Mold Materials

The drawing mold of Miniature Inner Grooved Copper Tubes (MIGCT) is made of WC-Co hard alloy, TiAlN coating is deposited on the substrate of WC-Co hard alloy. Inspections on binding force and hardness show that TiAlN coating is provided with fine surface finish and can meet the requirement of industrial production. Under simulated condition, experiments were carried out on the friction between the uncoated/coated hard alloy and copper. The experiments prove that hard alloy with TiAlN coating can effectively decrease the friction coefficient. .