Laser hardening of tools with the use of the beam
The main problem occurring during the laser hardening of tools is the lack of continuity and diversity of surface layer properties as a result of the use of many parallel hardening paths. As a consequence, there may be a forgiven or under-hardened area between successive paths. The paper presents the original method of laser hardening of tools, especially bending, using a laser beam splitter. Such a hardening method enables simultaneous heating and tempering of the tool corner and the surfaces adjoining it at the desired width in one pass with the same parameters. As a consequence, the hardened layer is uniform on the surface of the corner and adjacent surfaces, i.e. without forgiven or unhardened areas. The use of this method requires equipping the hardening laser head with a divider, whose task is to distribute the laser beam to separate parts of the beam with adjustable width by means of appropriately placed mirrors. The new method of hardening not only eliminates the problem of so-called hardening marks created as a result of laser hardening, which directly affects the quality, durability and durability of the tool, but is also much more efficient and also beneficial for economic reasons.
Cordovilla F., García-Beltrán A., Sancho P., Domínguez J., Ruiz-de-Lara L., Ocaña J.L., Numerical/experimental analysis of the laser surface hardening with overlapped tracks to design the configuration of the process for Cr-Mo steels, Materials and Design 2016, 102.
Coupard D., Palin-Luc T., Bristiel P., Vincent J., Christian D., Residual stresses in surface induction hardening of steels: comparison between experiment and simulation, Mater. Sci. Eng. A (2008, 487 (1–2).
Ion J.C., Surface hardening, in: J.C. Ion (Ed.), Laser processing of engineering materials. Principles, procedure and industrial application, first ed. Elsevier Butterworth- Heinemann, Oxford 2005.
Kennedy E., Byrne G., Collins D.N., A review of the use of high power diode lasers in surface hardening, J. Mater. Process. Technol. 2004, 155–156.
Kim M.H., Rhee K.Y., Paik Y.N., Hong J.S., Ham Y.S., Experimental investigation on the mechanical behavior of high-frequency induction-hardenedmild carbon, SPS5 steel,
Kristoffersen H., Vomacka P., Influence of process parameters for induction hardening on residual stresses, Mater. Des. (2001, 22 (8).
Kut S., Kogut K.: Sposób hartowania narzędzi, zwłaszcza gnących z rozdziałem wiązki światła laserowego. Zgłoszenie patentowe P.417906, 2016
Lee J-H, Jang J-H, Joo B-D, Son Y-M, Moon Y-H, Laser surface hardening of AISI H13 tool steel. Trans. Nonferrous Met. Soc. China 2009, 19.
Mater. Sci. Eng. A, 2008, 485 (1–2).
Revilla C., Lopez B., Rodriguez-Ibabe J.M., Carbide size refinement by controlling the heating rate during induction tempering in a low alloy steel, Mater. Des. (2014, 62.
Savaria V., Monajati H., Bridier F., Bocher P., Measurement and correction of residual stress gradients in aeronautical gears after various induction surface hardening treatments, J. Mater. Process. Technol. 2015, 220,.
Slatter T., Taylor H., Lewis R., et al., The influence of laser hardening on wear in the valve and valve seat contact, Wear 2009, 267
Telasang G., DuttaMajumdar J., Padmanabham G., Manna I., Structure–property correlationin laser surface treated AISIH13 tool steel for improved mechanical properties, Materials Science&Engineering A, 2014, 599.
Wang A.Q., Xie J.P., Wang W.Y., Li J.W., Li L.L., Effect of induction hardening on rolling wear properties of 45 steel, Trans. Mater. Heat Treat. 2007, 28 (1).
Zhu X., Zhang T., Marchant D., Morris V., The structure and properties of NiAl formed by SHS using induction heating, Mater. Sci. Eng. A, 2011, 528 (3).
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