Cutting blades with greater hardness thanks to integrated laser hardening

Integrated laser hardening provides solutions for hardening thin, elongated objects that warp during traditional hardening processes. It also offers other advantages.

In modern workshops most steel components have been hardened in order to extend the life-span. The main items include moulds, gates, form punches and also guides, blades and choppers. The last two items require a special production process. Because of their often thin, elongated shape these items warp badly during the hardening process and so require a lot of finishing work (grinding). This substantially raises both the lead times and the costs.

Integrated and non-integrated laser hardening is the solution to this problem, making it possible to individually grind and immediately harden the objects with a laser at the same time. As laser hardening only affects specific zones, geometric warping is extremely limited, and actually far below the desired tolerances, so that hard finishing such as grinding is not longer needed. It is also anticipated that laser hardening will allow higher levels of hardness thanks to the very high cooling speeds achieved in the process.

Preliminary research

Sirris is conducting preliminary research. It includes hardening 45° blades from C45 steel. The hardness levels are measured in relation to the laser parameters (supply, capacity) and the length of the hardened zone on the blade surface is being investigated further.

Read more on Techniline (article in Dutch/French).

Would you like to test whether laser hardening is suitable for your products or production line? Sirris can help by making their infrastructure at Diepenbeek available to you!

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