1. If you are designing a product with requirement of a high UTS(Ultimate tensile Strenght), high YS, low ductility steel, what process should you apply onto steel to get the steel with required properties?
2. If you want to get lustrous surface metal, what process should be applied?
1. To design a steel product with high Ultimate Tensile Strength (UTS), high Yield Strength (YS), and low ductility, you would need to apply a process called work hardening or cold working. Work hardening involves subjecting the steel to plastic deformation, typically through processes like cold rolling, cold drawing, or cold forging.
Here's how you can achieve the required properties:
- Cold Rolling: This process involves passing the steel through a series of rollers at room temperature, which compresses the material and increases its strength. It helps align the crystal structure and reduces the grain size, resulting in improved strength and hardness.
- Cold Drawing: This process involves pulling the steel through a die to reduce its diameter or thickness. The repeated stretching and compression of the material result in an increase in strength and improved mechanical properties.
- Cold Forging: This process involves shaping the steel by applying compressive forces using dies or hammers at room temperature. Cold forgings typically exhibit higher strength and lower ductility compared to hot forgings.
By subjecting the steel to these cold-working processes, you can achieve a high UTS and YS. However, it's important to note that ductility is reduced in the process, so it may not be suitable for applications where ductility is a critical requirement.
2. If you want to achieve a lustrous or glossy surface on metal, you can employ a process called polishing or buffing. Polishing involves smoothing the metal surface through abrasion with finer and finer abrasive materials until a desired level of shine is achieved.
Here's how you can achieve a lustrous surface on metal:
- Sanding: Start by sanding the metal surface with progressively finer grit sandpapers. This will help remove any roughness, scratches, or imperfections on the surface.
- Polishing Compounds: Apply a polishing compound, such as a metal polish or buffing compound, to the metal surface. These compounds contain abrasive particles that help further refine the surface and enhance its reflective properties.
- Buffing: Use a buffing wheel or a polishing pad attached to a power tool, such as a drill or a grinder, to buff the metal surface. Move the tool in consistent and overlapping motions, applying gentle pressure, to achieve a smooth and lustrous finish.
- Finishing Touch: After buffing, you can clean the surface with a mild detergent and water to remove any residue. Finally, you may apply a wax or sealant to protect the polished surface and maintain its luster.
By following these steps, you can achieve a lustrous or glossy surface on metal, enhancing its aesthetic appeal.