Maximizing Cold Heading Efficiency: Premium Tungsten Steel 6-Piece Segmented Dies by Chongqing Henghui

In the high-volume production of fasteners and precision components, tool failure equals costly downtime. As industrial manufacturing in Europe, America, and Asia transitions toward higher strength materials and tighter tolerances, traditional mold designs often hit a bottleneck. To address these extreme manufacturing challenges, Chongqing Henghui Precision Mold Co., Ltd. has launched its latest line of custom tungsten steel die components  and innovative 6-piece segmented dies  for advanced cold heading  applications.

Why Material Matters: The Microstructure of Tungsten Steel

For modern cold heading processes, standard tool steel often lacks the necessary red-hardness and wear resistance. Chongqing Henghui utilizes premium sub-micron grain tungsten carbide (WC-Co) matrices.

• Hardness & Toughness Balance: Our tungsten steel inserts achieve a hardness range of HRA 86 to 89, combined with a transverse rupture strength (TRS) exceeding 2800 MPa.

• Extended Lifespan: Empirical production data indicates that switching from high-speed steel (HSS) to our optimized tungsten carbide inserts increases mold lifespan by 300% to 500%, significantly lowering the cost-per-part ratio.

Engineering Breakthrough: The 6-Piece Segmented Die 

When forming complex geometries—such as hexagonal, Torx, or multi-stage flange bolts—solid dies often fail due to severe tensile stress concentration at the internal corners.

Chongqing Henghui's Solution: The 6-piece segmented combination die inserts. By splitting the insert into six precisely ground segments prestressed within a robust steel casing, we convert destructive tensile stress into manageable compressive stress.

• Precision Tolerances: Each segment is wire-cut and ground to a mirror finish with tolerances controlled within ±0.002 mm.

• Stress Relief: This modular design prevents catastrophic cracking, allowing the combination die  to withstand the repetitive, high-impact forces inherent in multi-station cold headers.

Meeting Global Standards: Europe, America, and Asia

Whether your facility complies with DIN, ISO, ANSI, or JIS standards, Chongqing Henghui delivers customized precision. Our technical team conducts finite element analysis (FEA) based on your specific wire material (e.g., carbon steel, stainless steel, or alloy steel) to tailor the optimal interference fit ratios for the casing and the tungsten steel inserts.