Thermal Fatigue Testing of Duplex-Coated Hot Work Tool Steels at Elevated Temperatures

2011 ◽  
Author(s):  
Yucel Birol
Keyword(s):  
Thermal Fatigue ◽  
Elevated Temperatures ◽  
Fatigue Testing ◽  
Tool Steels ◽  
Hot Work Tool Steels

Numerical modelling and physical simulation of the softening behaviour of hot work tool steels during thermal fatigue

2004 ◽  
Vol 120 ◽  
pp. 649-656
Author(s):  
I. Siller ◽  
W. Waldhauser ◽  
R. Ebner
Keyword(s):  
Thermal Fatigue ◽  
Physical Simulation ◽  
Fatigue Testing ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Tool Steels ◽  
Chaboche Model ◽  
Different Temperatures ◽  
Pull Tests ◽  
Hot Work Tool Steels

Fatigue due to thermal cycling is one of the main reasons for the damage of tools used in die casting processes. In order to investigate the thermal fatigue behaviour of tool steels a thermal fatigue testing facility was designed and built up. For better understanding of the mechanisms of thermal fatigue finite element-simulations were carried out. To specify the cyclic material behaviour push-pull-tests at different temperatures were performed. The Chaboche-model was used to describe the kinematic material response. Isotropic softening is also taken into account. Depending on the arising accumulated plastic strain stable cyclic deformation or continuous softening occurs. The results are consistent with the accomplished thermal fatigue tests on different hot work tool steels.

scholarly journals The Influence of Laser Surface Alloying on the Thermal Fatigue Resistance of Hot Work Tool Steels

2016 ◽  
Vol 61 (3) ◽  
pp. 1309-1314 ◽  
Author(s):  
E. Jonda ◽  
Z. Brytan ◽  
K. Labisz ◽  
A. Drygała
Keyword(s):  
Surface Layer ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Laser Surface ◽  
Strengthening Effect ◽  
Surface Alloying ◽  
Tool Steels ◽  
Laser Surface Alloying ◽  
Thermal Fatigue Resistance ◽  
Hot Work Tool Steels

Abstract The paper presents results of the effect of laser surface remelting and alloying by carbides powders of NbC, TaC, TiC, VC and WC on the structure and thermal fatigue resistance of the surface layer of hot work tool steels X40CrMoV5-1 and 32CrMoV12-28. The laser surface alloying and remelting treatments was performed using a high power diode laser (HPDL ROFIN SINAR DL 020). In order to investigate the effect of applied laser treatments and used alloying powders on the microstructure and thermal fatigue resistance of processed surface layer of hot work tool steels, the microstructure evaluation by light microscopy, hardness test, and dedicated thermal fatigue resistance test were performed. The best results regarding fatigue cracks inhibition was obtained when the surface of hot work tool steels was alloyed with TiC and VC carbides at the laser beam power of 2.0 and 2.3 kW. The grain refinement effect of laser remelting has a lower impact on the thermal crack inhibition, than a strong strengthening effect of matrix saturation in alloying elements and precipitation of fine carbides in the steel matrix.

scholarly journals Wear and Friction Evaluation of Different Tool Steels for Hot Stamping

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Maider Muro ◽  
Garikoitz Artola ◽  
Anton Gorriño ◽  
Carlos Angulo
Keyword(s):  
Friction And Wear ◽  
Elevated Temperatures ◽  
Hot Stamping ◽  
Steel Specimen ◽  
Wear Behaviour ◽  
Tool Steels ◽  
Uncoated Steel ◽  
Martensitic Microstructure ◽  
Increasing Temperature ◽  
Hot Work Tool Steels

The aim of this work is to investigate the durability of tool steels for hot stamping by comparing the wear resistance of three hot work tool steels. Friction and wear behaviours of different tool steels sliding against a 22MnB5 uncoated steel at elevated temperatures were investigated using a high-temperature version of the Optimol SRV reciprocating friction and wear tester at temperatures of 40 and 200°C. Our results show that friction decreased with increasing temperature, whereas wear of the tool steel increased with temperature for the second and the third tested tool steels. The slightly better wear behaviour of steel specimen 1 comes from the hardness of the carbides in the martensitic microstructure, which are rich in vanadium.

Thermal fatigue cracking of surface engineered hot work tool steels

2005 ◽  
Vol 191 (2-3) ◽  
pp. 216-227 ◽  
Author(s):  
Anders Persson ◽  
Sture Hogmark ◽  
Jens Bergström
Keyword(s):  
Thermal Fatigue ◽  
Fatigue Cracking ◽  
Tool Steels ◽  
Hot Work Tool Steels

Thermal fatigue properties of hot-work tool steels

2008 ◽  
Vol 3 (2/3) ◽  
pp. 363 ◽  
Author(s):  
M. Pellizzari ◽  
A. Molinari ◽  
D. Cescato ◽  
A. Ghidini ◽  
S. Cantini
Keyword(s):  
Thermal Fatigue ◽  
Fatigue Properties ◽  
Tool Steels ◽  
Hot Work Tool Steels
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