An original multi-scale approach is proposed to understand how local forging parameters influence the evolution of the topography, microstructure and mechanical properties near the tool surface during its service life. To this end, the study is based on observing the geometric elements constituting the tool surface in 3 life states. The mechanical and thermal tribological conditions encountered during forming differ according to the local geometry. Near-surface mechanical properties are determined from nanoindentation tests for the different geometric conditions and wear states. The mechanical property measurements and the microstructure analysis correlate quite well. A significant decrease in hardness and elastic modulus was observed depending on the geometric area studied. Analysis of the microstructure revealed a transition from martensite to a ferrite matrix with globular cementite and fine metal carbonitride precipitates.
JangYSKoDCKimBM. Application of the finite element method to predict microstructure evolution in the hot forging of steel. J Mater Process Technol2000; 101: 85–94.
2.
LiZWangJNiT, et al.Microstructure evolution and deformation mechanism of AZ80 alloy during die forging. Mater Sci Eng A2023; 869: 144789.
3.
BrooksJW. Friction during precision forging of high temperature aerospace materials. Mater Sci Technol2012; 28: 528–531.
4.
BirolYIlgazO. Effect of cast and extruded stock on grain structure of EN AW 6082 alloy forgings. Mater Sci Technol2014; 30: 860–866.
5.
TamizifarMOmidvarHSalehiSMT, et al.Effect of processing parameters on shear bands in non-isothermal hot forging of ti-6Al-4V. Mater Sci Technol2002; 18: 21–29.
6.
LiMQXiongAMLinH. Effect of process parameters on deformation and temperature rise during forging of TC6 alloy disc. Mater Sci Technol2008; 24: 1340–1345.
7.
LeeSMKangCG. Comparative study of direct and indirect forging processes for rheological material of A356 aluminium alloy. Mater Sci Technol2011; 27: 406–415.
8.
CongDYWangYDZetterströmP, et al.Crystal structures and textures of hot forged Ni48Mn30Ga22 alloy investigated by neutron diffraction technique. Mater Sci Technol2005; 21: 1412–1416.
9.
RooksBWSinghAKTobiasSA. Temperature effects in hot forging dies. Met Technol1974; 1: 449–455.
10.
VenugopalSVasudevanMVenugopalS, et al.Industrial validation of processing maps of 316L stainless steel using hot forging, rolling, and extrusion. Mater Sci Technol1996; 12: 955–962.
11.
ZhangYHuiWHanD. Hot forging simulation analysis and application of microalloyed steel crankshaft. J Iron Steel Res Int2007; 14: 189–194.
12.
ShenLZhouJMaX, et al.Microstructure and mechanical properties of hot forging die manufactured by bimetal-layer surfacing technology. J Mater Process Technol2017; 239: 147–159.
13.
WidomskiPKaszubaMDobrasD, et al.Development of a method of increasing the wear resistance of forging dies in the aspect of tool material, thermo-chemical treatment and PVD coatings applied in a selected hot forging process. Wear2021; 477: 203828.
14.
SolgiPChenaraniMEivaniAR, et al.Heat checking as a failure mechanism of dies exposed to thermal cycles: a review. J Mater Res Technol2023; 26: 865–895.
15.
PodgornikBZuzekBKafexhiuF, et al.Effect of si content on wear performance of hot work tool steel. Tribol Lett2016; 63: 5.
16.
KorkmazMEGuptaMKÇelikE, et al.Tool wear and its mechanism in turning aluminum alloys with image processing and machine learning methods. Tribol Int2024; 191: 109207.
17.
EbaraR. Fatigue crack initiation and propagation behavior of forging die steels. Int J Fatigue2010; 32: 830–840.
18.
HawrylukM. Review of selected methods of increasing the life of forging tools in hot die forging processes. Arch Civ Mech Eng2016; 16: 845–866.
19.
YuXSWuCShiRX, et al.Microstructural evolution and mechanical properties of 55NiCrMoV7 hot-work die steel during quenching and tempering treatments. Adv Manuf2021; 9: 520–537.
20.
Łukaszek-SołekAKrawczykJŚlebodaT, et al.Optimization of the hot forging parameters for 4340 steel by processing maps. J Mater Res Technol2019; 8: 3281–3290.
21.
EmamverdianAASunYChunpingC. Deformation and wear in a H21 (3Cr2W8V) steel die during hot forging: simulation, mechanical properties, and microstructural evolution. J Mater Res Technol2021; 15: 268–277.
22.
ChenFCuiZ. Mesoscale simulation of microstructure evolution during multi-stage hot forging processes. Modell Simul Mater Sci Eng2012; 20: 45008.
23.
PoloczekŁRauchŁWilkusM, et al.Physical and numerical simulations of closed die hot forging and heat treatment of forged parts. Materials (Basel)2020; 14: 15.
24.
SilveiraACDFBevilaquaWLDiasVW, et al.Influence of hot forging parameters on a low carbon continuous cooling bainitic steel microstructure. Metals (Basel)2020; 10: 01.
25.
SolankiABSonigraSSVajpayeeV. Implementation of quality tools and effective strategies to boost production market standards for forged crankshafts: a case study of forging industry. Mater Today Proc2021; 47: 5970–5976.
26.
BarrauOBoherCGrasR, et al.Analysis of the friction and wear behaviour of hot work tool steel for forging. Wear2003; 255: 1444–1454.
27.
BoualemNDubarMMoreauP, et al.Influence of forming cycles on the mechanical properties and tribological behaviour of hot forging tools. In: 14th International conference on the technology of plasticity, Mandelieu-La Napoule, France, September 2023.
28.
ErsenAGüngörE. Alternative surface roughness measurement technique for inaccessible surfaces of jet engine parts using the rubber silicon replica method. Metallogr Microstruct Anal2013; 2: 337–342.
29.
ChangHBorghesaniPSmithWA, et al.Application of surface replication combined with image analysis to investigate wear evolution on gear teeth – A case study. Wear2019; 430-431: 355–368.
30.
ÖzdemirİBAkarF. The effect of flow orientation on nitriding process. Vacuum2015; 116: 104–109.
31.
ÖzdemirİBAkarF. Local dynamics of chemical kinetics at different phases of nitriding process. J Mater Eng Perform2015; 24: 2984–2989.
32.
ÖzdemirİBLippmannN. Modeling and simulation of surface reactions and reactive flow of a nitriding process. Surf Coat Technol2013; 219: 151–162.
33.
ZhouYLXiaFXieAJ, et al.A review—effect of accelerating methods on gas nitriding: accelerating mechanism, nitriding behavior, and techno-economic analysis. Coatings2023; 13: 1846.
34.
SrinivasanDRDeviDMBhagavathulaUR, et al.Nitriding treatment for improvement of eroded surfaces by Electroerosion. Mater Today Proc2023. https://doi.org/10.1016/j.matpr.2023.07.197
35.
HubickiRRichertMWiewióraM, et al.An experimental study of temperature effect on properties of nitride layers on X37CrMoV51 tool steel used in extrusion aluminium industry. Materials (Basel)2021; 13: 2311.
36.
ZhouQWuXShiN, et al.Microstructure evolution and kinetic analysis of DM hot-work die steels during tempering. Mater Sci Eng A2011; 528: 5696–5700.
37.
MichaudPDelagnesDLamesleP, et al.The effect of the addition of alloying elements on carbide precipitation and mechanical properties in 5% chromium martensitic steels. Acta Mater2007; 55: 4877–4889.
38.
YanHZhaoLChenZ, et al.Investigation of the surface properties and wear properties of AISI H11 steel treated by auxiliary heating plasma nitriding. Coatings2020; 10: 28.
39.
EbnerSMarsonerSSillerI, et al.Thermal fatigue behaviour of hot-work tool steels: heat check nucleation and growth. Int J Microstruct Mater Prop2008; 3: 182–193.
