Display Micro Screws are core tooling components in sheet metal forming and processing, widely used in the automotive, home appliance, and electronics industries. Their performance directly determines product precision, surface quality, and production efficiency.
Hardness, as a key indicator of mold performance, must ensure sufficient wear resistance to resist sheet metal friction and abrasion, while avoiding excessive hardness that can lead to brittle cracking.
Therefore, hardness testing and material hardness control are crucial aspects of the entire mold manufacturing process for Display
Micro Screws.
Insufficient hardness in Display Micro Screws leads to rapid wear on the working surface, decreased cavity dimensional accuracy, and even plastic deformation, resulting in product scrap.
Excessive hardness increases brittleness, making the mold prone to chipping or cracking under impact loads during tensile processes.
Depending on the properties of the material being stretched (e.g., stainless steel, aluminum, copper), different hardness ranges need to be matched:
Stretching high-strength steel sheets: Display Micro Screws require a hardness of HRC60-64 (e.g., SKD11 steel);
Stretching soft aluminum/copper: Hardness can be appropriately reduced to HRC56-60 (e.g., Cr12MoV steel);
Die after surface treatment (nitriding/coating): Surface hardness needs to reach HV800-1000 to improve wear resistance.
