Sadhu Forging Metallurgical Engineer Interview Questions, Process, and Tips

Steel grading system categorizes steel based on its chemical composition, physical properties, and intended use.

• Steel grades are typically classified by a numbering system such as AISI, ASTM, or SAE.

• Grades indicate the carbon content, strength, and other alloying elements present in the steel.

• Examples include AISI 304 stainless steel, ASTM A36 structural steel, and SAE 4140 alloy steel.

The structure after forging is typically more refined and denser compared to the original material.

• Forging process rearranges the internal grain structure of the material

• Grain boundaries become more uniform and aligned

• Increases in strength and toughness can be observed

• Reduction in porosity and defects

• Examples: Steel forged into a crankshaft, aluminum forged into aircraft components

Sample locations in a carburizing furnace are crucial for accurate analysis of the process.

• Sample locations should be evenly distributed throughout the furnace to ensure representative results.

• Consider placing samples at different heights and distances from the heat source to account for temperature variations.

• Samples should be placed in areas where carburization is expected to be most effective, such as near the carbo...read more

Fine pearlite and getrite have different effects on the properties of steel.

• Fine pearlite increases strength and hardness of steel due to its fine structure.

• Getrite improves toughness and ductility of steel by reducing the amount of pearlite present.

• Fine pearlite is formed by rapid cooling, while getrite is formed by slow cooling.

• The combination of fine pearlite and getrite can result in a balanced mix of strength, tou...read more