Complex induction treatment of HSS steel for production of forge welds – POSTER

Opatová Kateřina - ZČU Plzeň (Czech Republic)

The aim of the article was to propose a comprehensive procedure for obtaining a heat-treated turning tool with a forge-welded cutting insert made of high-speed steel (HSS). This procedure replaced the original long sequence of operations, which initially involved heating the assembly of the lathe tool bed and the cutting insert to a temperature of 1200 °C in a chamber furnace for forge welding. Subsequently, a forge weld was created using a hydraulic press, followed by independent regime of heat treatment. The new procedure was designed to achieve the forge weld simultaneously with the heat treatment, eliminating the need for intermediate steps when using the chamber furnace. The shortening of the process was achieved by installing an induction heater into the space of the hydraulic press. A specific part of the lathe tool bed with the HSS steel insert was heated in the induction coil, and immediately thereafter, forging for welding and heat treatment took place.
The development of this technology has led to the production of a turning knife suitable for special machining operations, such as machining with interrupted cuts. This machining operation requires tools with high toughness, which can be provided by HSS steels, unlike tools made of sintered carbides. The HSS steel, after heat treatment, underwent metallographic analysis and hardness measurements. The research results were validated through machining wear tests, which examined the functional properties of forged and heat-treated HSS steel after forge welding.

Back to Posts