In this study, IF steel was coated by the low-pressure cold spray deposit method with different coating materials. Al, Ni, Zn, and Sn powders were used as coating matrix. All coating materials were reinforced by Al2O3 particles. Mechanical properties of the coatings were determined by three-point bending, scratch, wear tests, and hardness measurement. Micro-level defects and structure of coatings were examined by SEM, EDX, and Optical microscope analysis. All coatings were applied successfully, and the most distinct defects occurred in the Ni-matrix coating. The hardness of the Ni matrix coating was the highest, however the wear resistance was the highest for the Zn matrix coating. The lowest hardness and wear resistance were measured in the Sn matrix coating. As a result of the bending test, distinct crack formations were observed in the Zn matrix coating, unlike the others.

This study examined the effects of hot rolling on the microstructure, tensile strength, and corrosion behaviors of three different alloy steels made by powder metallurgy: Fe-0.55C, Fe-0.55C-3Mo, and Fe-0.55C-3Mo-10Ni. 700 MPa pressure was applied to press the particles. The cold pressed samples were sintered in a mixed-gas atmosphere (90% nitrogen, 10% hydrogen) at 5?C/min up to 1400?C for 2 hours. Then, the produced steels were hot rolled with a deformation rate of 80%. The microstructures show that deformed Mo and Mo-Ni steels have finer microstructures, better mechanical properties than undeformed Mo and Mo-Ni steels, and MoC, MoN, or MoC(N) was formed in the Mo-Ni steels. The highest mechanical properties were obtained in rolled steel samples containing Mo-Ni, followed by rolled Mo steel and rolled carbon steel samples, and then unrolled samples. Additionally, Tafel curve analysis demonstrated that alloy corrosion resistance rose as Ni concentration increased. It has also been observed that the hot rolling process improves corrosion resistance. The increase in the density value with the rolling process emerged as the best supporter of corrosion resistance.