Effect of Heat Treatment on Microstructure and Mechanical Properties of Laser Additively Manufactured AISI H13 Tool Steel

Wear characterization of multilayer laser cladded high speed steels

“…Since heat treatment has been found to offer no considerable improvement in the wear resistance of laser clad HSS [29], the wear testing of laser clad HSS alloys was performed in as clad conditions, without application of post heat treatment. Conversely, during the wear testing of laser clad HSS, Chen et al [49] found an increase in wear with increasing tempering temperatures. Wang et al [25] and Leunda et al [50] reported an increase in hardness upon heat treatment due to transformation of retained austenite to martensite as the retained austenite yields a relatively low hardness.…”

Ultrastrong and ductile synergy of additively manufactured H13 steel by tuning cellular structure and nano-carbides through tempering treatment

“…Tempering is an effective method to eliminate the retained austenite and produce pronounced secondary hardening by introducing carbides (e.g. M 23 C 6 , M 7 C 3 , MC) in H13 steel [10,25,26]. It was confirmed that tempering at 500e600 C with appropriate holding time could simultaneously improve the hardness and softening the resistance of as-SLMed H13 steel [25].…”

Microstructure and Mechanical Properties of Laser Additive Manufactured H13 Tool Steel

“…During cladding of this layer, a very fast quenching occurred within a few seconds, and the hardness should also reach 700 HV. The decrease in hardness resulted from annealing to a temperature of approximately 600 • C [31]. This effect is very interesting, as the second and third layers were annealed due to the heat input from cladding the following layers and not the first one.…”