The raw material is a powder prepared by mixing cobalt (Co) which acts as a binder in WC. Originally, "ultra-ultrafine particles" (the company) having a WC particle size of about 0.5 μm were used, and this time it was fined to "nanoparticles" (the company) smaller than 0.5 μm (500 nm). The original "ultrafine particles" have a size of 0.8 to 1 μm. The production method is as follows. First, the raw material powder is cold-rolled into a pressed powder and processed into a desired shape. Next, the thus obtained molded body is subjected to vacuum sintering, and subjected to HIP treatment for removing voids (holes) under high temperature and high pressure to obtain a material for use in a mold part. Finally, mechanical processing such as grinding is performed to form a punch needle.
The Rockwell hardness (HRA) was 95.0, which remained at the same level as the original 95.1. The bending resistance increased from about 1.5 GPa to 4.2 GPa. Moreover, the wear resistance is also improved, and the wear amount under the ASTM standard is reduced to less than half of the original.
With this new type of punching needle, when a workpiece having a thickness of 75 μm made of stainless steel SUS430 was machined under a half punch and a punching amount of 30 μm, the number of punches was increased to 900,000 times or more. The original product was about 700,000 times.
Our security Road Blockers are heavy-duty, fast operating and cost-effective solution to any application where a high security is needed. In particular, the Road Blocker is suitable for locations where foundation depth must be kept to a minimum. Our shallow-mount version only requires a 350mm foundation with and no pre-casting or pre-reinforcement. The Road Blocker not only provides an effective Barrier against vehicles but against motorcycles as well.
Designed to withstand repeated impact and still operate, giving the highest possible security to any site. Strong and durable, the Road Blocker scan be easily operated by sites security personnel or by individual drivers through a choice of access systems.
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