Laser Cladding of Hot Work Tool Steel (H13) With Tic Nanoparticles

Abstract

In this study, titanium carbide nanoparticles (TiC) were coated on the surface of X40CrMoV51 (H13) hot work tool steel by laser coating method. Two stage laser cladding method was employed for coating processes. In the first stage, TiC powders were mixed in the phonelic resin and precoated at 50 µm thickness on the surface of steel substrate under vacuum. In the second stage, laser was directed to the surface and then hard coating layers were obtained on the steel surfaces. A CO2 laser with 2000 W power was operated at continuous-wave mode in the experiments. All laser cladding processes were performed under N2 atmosphere and various laser powers were selected to show the effect of laser power on the quality of coated steel surfaces. The morphology and phase structures were examined by scanning electron microscopy, Xray spectroscopy and optic microscope, respectively. The hardness of coating layers and bonding strength was defined with micro hardness tests and scratch test. The thickness of the coatings layers were measured in the range of 15-130 µm depending on laser powers. It is seen that crack-free, smooth and homogenous coating layers can be obtained at 237 W laser power. According to the hardness and micro-scratch tests results, hardness was improved significantly, and all coating layers had a good metallurgical strength to the substrate.

Comparing and analysing the characterisation of laser cladding of CrNiW and CrNiFeAlZr powders on H13 tool steel

“…The life duration of the die was extended by covering it with CrMoTaWZr CCAs, which contains zirconium and has a strong resistance to corrosion by alkalis, acids and salt water. 7 Simsek et al 8 coated TiC nanoparticles on H13 die steel by a CO 2 laser in a N 2 environment, resulting in a crack-free and homogeneous coating with three times the hardness of the substrate. Jinkang et al 9 investigated laser cladding on H13 steel with Ni-based alloy using pulsed YAG laser equipment in which the Ni-based alloy was mixed with TiC and CeO 2 to rise the wear resistance of the H13 steel base.…”

“…Wang et al 25 prepared Stellite-6/WC metal matrix composite deposited on H13 die steel using laser cladding technique with cobalt-coated tungsten carbide (WC-12Co) particles and Stellite-6 powder. The literature survey shows that many experiments have been conducted on laser cladding of AISI H13 steel substrate using CPM 9V, 4 NiTi, 6 CrMoTaWZr, 7 TiC nanoparticles, 8 Ni-based alloy powders, 9 CoFeNiCrAlTi HEA, 11 stellite 6-Cr 3 C 2 -WS 2 self-lubricating composite, 19 Ti 3 AlC 2 -reinforced Co-based alloy, 20 NiCrAl-WC, 21 Fe-based coatings with varied WC, 23 Stellite-6/WC metal matrix composite, 25 CrNi coatings with different TiO 2, 26 CoCrFeNiBSi HEA, 27 NiCrBSi + Ni/MoS 2 powder, 28 CoCrFeNiTiNbB 1.25 HEA, 29 FeCoCrNiMnAl HEA, 30 WC/Co-Cr alloy, 31 WC/Ni, 32 Nickel-based composite, 33 Al 2 CoCrCuFeNi, 34 FeCoCrNiMnAl x, 35 Cr–Ni–Al 2 O 3 –TiO 2 composite, 36 FeMnCrNiCo + x(TiC) composite HEA, 37 and NiCrAl-SiC. 38 However, CrNiW and CrNiFeAlZr clad powders were not considered so far in laser cladding of H13 steel.…”

Process Variable Optimization of Cold Metal Transfer Technique in Cladding of Stellite-6 on AISI 316 L Alloy Using Grey Relational Analysis (GRA)

“…The laser fluencies were the most responsible factor for reducing the hardness. Şimşek et al [18] TiC nanoparticles were deposited on the H13 tool steel using CO2 laser, performed under N2 atmosphere in which the crack-free and homogenous coating were obtained, and the hardness of the clad layer was three times improved when compared to the substrate. Kim et al [19] have been used the grey relational approach to optimize the welding parameters for laser arc hybrid welding of an aluminium alloy and compared their results with those obtained from Taguchi methods.…”