Large Tool Steel Die for Powder Metallurgy Pressing

In the powder metallurgy industry, certain large components such as mechanical structural parts, transmission assemblies, square blocks, guide elements, and high-density support components require elevated forming pressures and die strength. Consequently, large-sized tool steel dies must be utilized for pressing operations. These dies not only withstand high-tonnage impacts but also require exceptional dimensional stability and longevity performance. Our company specializes in the research, development, and manufacturing of large-scale powder metallurgy pressing dies, offering customized machining services and providing powder metallurgy tooling for large components.

Our dies are suitable for the research and manufacturing sectors of advanced materials including superconducting materials, batteries, rare earths, and advanced ceramics. Through optimized die structural design and material selection, we ensure pressed compacts possess precise geometric shapes, uniform density distribution, and stable dimensional accuracy, particularly suited for automated production scenarios requiring high product consistency.

Low-price custom solutions. Our factory business includes designing, developing, and manufacturing powder metallurgy moulds, carbide parts, powder injection moulds, stamping toolings and precision mould parts.
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Design of Large Tool Steel Dies for Powder Metallurgy Pressing

The dies employ modular structural design, with core components including the female die, upper punch assembly, lower punch assembly, and core rods. To address complex powder filling and demolding requirements, the dies integrate multi-segment upper die configurations and segmented extraction processes. Through coordinated action of upper press rods and lower ejector rods, the movement distance of pressed compacts is effectively reduced. Targeting residual gas issues during the pressing process, the dies adopt axial-radial composite exhaust channel design, combined with extraction units for precise gas discharge control, enhancing powder filling density and compact quality. Simultaneously, die structural design must consider pressing pressure distribution, stress concentration zones, and demolding paths to avoid cracking, corner chipping, or deformation issues. High-tonnage equipment also demands higher matching precision for guide sleeves, punches, cavities, and other components.

Die Material Selection

Large-sized powder metallurgy dies are typically manufactured from high-grade tool steel or powder metallurgy high-speed steel materials to ensure high strength, hardness, and excellent fatigue resistance. Die materials are precision-selected from premium H13 tool steel and SKD11 die steel, processed through tempering treatment, vacuum quenching, and deep cryogenic stabilization processes, achieving hardness of HRC58 to 62 with superior compressive strength and deformation resistance. For more demanding applications, high-performance tool steel produced via powder metallurgy processes is recommended, featuring finer carbide particles, no macroscopic segregation, hardness reaching HRC60 to 63, and wear resistance approaching that of high-speed steel.

Key Control Points for Pressing Large Powder Metallurgy Components

Large powder metallurgy components demand high requirements for density uniformity, sintering deformation control, and strength. Therefore, die engineers must evaluate powder flowability, pressing direction, and demolding structure. Inadequate density uniformity or poor pressing may result in post-sintering distortion or insufficient strength issues.

In powder metallurgy application scenarios requiring high pressure, precision, and durability, selecting an established die supplier can significantly enhance product consistency, longevity performance, and cost advantages.

Please feel free to consult with us for customization. We will provide professional advice and a quotation plan based on your specific needs.