Die steel is a specialized type of steel used in the production of molds for forging or die-casting processes. Depending on the operating conditions of the mold, die steel is generally categorized into two main types: cold work die steel and hot work die steel. Hot work die steel is specifically designed for forming hot metal or molten metal, and it must possess several key properties such as high thermal stability, excellent wear resistance, adequate toughness, superior heat fatigue resistance, good hardenability, and strong oxidation resistance.
Despite these favorable characteristics, internal defects in the workpiece can lead to serious issues during the manufacturing process. Common defects include microsegregation, non-metallic inclusions, and hydrogen-induced white spots. These imperfections can significantly compromise the structural integrity and performance of the final product. In particular, they pose a major threat to the heat treatment process, which is crucial for achieving the desired mechanical properties.
This paper aims to explore the impact of these internal defects by examining real-world cases where cracking occurred in die steel components. Through detailed analysis, we will highlight how such flaws affect the reliability and durability of the workpieces, and discuss potential strategies for prevention and improvement. Understanding these challenges is essential for enhancing the quality and lifespan of die steel products in industrial applications.
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