Choosing the Right Insert for Hardened Steel Machining

In the process of creating hardening tools, toolmakers need to be able to choose the appropriate insert for each particular application. Hard inserts are designed to offer high wear resistance and enhanced performance for hot cutting environments. Tough inserts are designed to withstand abrasive wear and impacts. A good tool supplier can help users find the correct balance of hardness and toughness for a given application.

Hardened steels are becoming increasingly hard. Initially, 45 RC tool steels were considered hard, but nowadays they can reach 63 RC, which makes them the most common choice for mold and die makers. In order to avoid heat-treating, mold makers now often mill parts after they are hardened. However, milling fully hardened alloys is not recommended. The process can cause plastic deformation in the cutting insert and may lead to a rapid failure.

A solid CBN insert consists of CBN powder and a bonding material. It is designed to withstand high temperatures and pressure. This type of insert is often used in the automotive and energy equipment industries. It is also a good choice for cutting powder metals. These inserts also reduce the possibility of edge breakage.

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