Case Hardening (Carburizing, Nitriding)
This process hardens only the surface of the workpiece, but the inside remains soft. Carburizing adds carbon to the surface of the metal, while Nitriding uses nitrogen gas to form a hard surface. Both methods improve the part’s resistance to rust.
Key Points for Metal Parts Repair
Key Points for Metal Parts Repair: A Comprehensive Guide Metal part repair is a critical skill in manufacturing, automotive, aerospace, and maintenance industries. A successful repair restores not just the geometry but also the structural integrity, function, and often the appearance of the component. Here are the essential points to consider. 1. Initial Assessment and […]
Understanding the Hardness of Metal Fasteners
The hardness of a metal fastener (such as screws, bolts, nuts, and rivets) is a critical mechanical property that defines its resistance to permanent deformation, wear, abrasion, and indentation. Essentially, it indicates how well the fastener can maintain its shape and function under load and in challenging environments. 1. Why Hardness Matters Prevents Thread Galling: Harder […]
Quenching
Here, the metal is cooled very quickly. Different mediums can be used to cool at different speeds, such as water, air, or oil.
Precautions for Spray Painting Metal Parts
Spray painting metal is a process that requires careful preparation, execution, and finishing to achieve a durable, high-quality, and professional result. Ignoring key precautions can lead to poor adhesion, premature failure, and an unsightly finish. Here are the essential precautions, broken down into stages. 1. Safety Precautions (The Highest Priority) Ventilation: Always work in a well-ventilated area. […]
Tempering
The brittleness of the workpiece is reduced, and the toughness is also improved. The part is reheated to a lower temperature and held for a while to balance its strength and flexibility.
Annealing
The term “annealing” fundamentally refers to a process of heating and controlled cooling applied to a material or a system to alter its physical and sometimes chemical properties, with the primary goals of reducing hardness, increasing ductility, and eliminating internal stresses. This core concept has been extended metaphorically to the field of computer science, specifically in optimization […]
Hardening
Hardening is used to improve the surface hardness of the metal. The part is heated up and cooled down quickly, forming a hard structure inside it called martensite. This structure is usually brittle, so the process is followed by tempering.
Cooling Methods for Forgings
The cooling process after forging is a critical step that directly determines the final microstructure, mechanical properties, and residual stress of the metal part. Selecting the appropriate cooling method is essential to meet the specified material properties and performance requirements. Here are the primary cooling methods employed in the forging industry: 1. Still Air Cooling […]
Normalizing
This is a process that’s usually used on forged or cast steel. It gives the metal a uniform grain structure, improving its toughness and making the metal more stable.
