What material is better for stamping die punch needle?

Update:17-03-2022
Summary:

Stamping die punching needle is a commonly used stampin […]

Stamping die punching needle is a commonly used stamping die accessory. During the processing process, the punching needle is subject to vibration, impact, friction, high pressure and stretching, etc., and is prone to wear, fatigue, fracture and other phenomena. Therefore, when selecting the material, the material must be in line with the characteristics of the mold. Only by selecting a suitable punching needle material can it be used for a longer time. So what material is better for stamping die punch needle?
High-quality carbon structural steel: Compared with ordinary A3 low carbon steel, it has higher strength and deformation resistance. The representative carbon structural steel material used for stamping die punching needle is 45# steel.
High-carbon and high-chromium tool steels: High-carbon and high-chromium tool steels commonly used in stamping dies and punches include Cr12, Cr12MoV, Cr12Mo1V1, SKD11, etc. They all have good hardenability, hardenability and wear resistance, and heat treatment deformation. Very small, it is a high wear-resistant micro-deformation die steel, and its bearing capacity is second only to high-speed steel. However, the segregation of carbides is serious, and repeated upsetting and forging are required to reduce the inhomogeneity of carbides and improve the performance.

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