Influence of Laser Processing Modes of Vt1-0+mn19 Bimetal on the Structure and Micromechanical Properties of the Remelt Baths

It has been established that during laser processing of a bimetal copper-nickel alloy MN19 + titanium VT1-0 mode with a power P = 1400 W and a laser beam speed of 0.8 m/min with a diameter of 2 mm provides optimal characteristics of the remelting bath in terms of hardness and uniformity of structure. It has been shown that a remelting bath with a homogeneous structure is ensured at a specific radiation energy of 52.52 J/mm2. In this case, an increase in the microhardness of the remelting bath by 1 GPa with an increase in the speed of movement of the laser beam and a decrease in the diameter of the spot is explained by an increase in its cooling rate.