Influence of Temperature and Tempering Conditions on Thermal Conductivity of Hot Work Tool Steels for Hot Stamping Applications

2015 ◽  
Vol 86 (12) ◽  
pp. 1628-1635 ◽  
Author(s):  
Stephan Hafenstein ◽  
Ewald Werner ◽  
Jens Wilzer ◽  
Werner Theisen ◽  
Sebastian Weber ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Hot Stamping ◽  
Tool Steels ◽  
Influence Of Temperature ◽  
Hot Work Tool Steels

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.

The low temperature aluminising kinetics of hot-work tool steels

2012 ◽  
Vol 67 (2) ◽  
pp. 133-139
Author(s):  
B. Matijević ◽  
I. Kumić ◽  
T. Belić
Keyword(s):  
Low Temperature ◽  
Tool Steels ◽  
Kinetics Of ◽  
Hot Work Tool Steels

scholarly journals Properties of Tool Steels Printed by Directed Energy Deposition Process on S45C Base Metal

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5068
Author(s):  
Sungjong Choi ◽  
Hochan Kim ◽  
Jihyun Sung ◽  
Dongmok Lee ◽  
Jongdock Seo
Keyword(s):  
Base Metal ◽  
Energy Deposition ◽  
Steel Plate ◽  
Hot Stamping ◽  
Wear Loss ◽  
Tool Steels ◽  
Directed Energy Deposition ◽  
Directed Energy ◽  
Wear Tests ◽  
Equiaxed Dendrites

We present a fundamental study on the development of trimming dies at room temperature for the hot-stamping process using directed energy deposition. Specimens of G and F materials were fabricated by machining 3D-printed blocks. The hardness of G-layered specimens was slightly higher than that of F-layered specimens, reaching approximately 700 HV at the surface. The G-layered specimens consisted of columnar and equiaxed dendrites, whereas the F-layered specimens mainly consisted of equiaxed dendrites. Spherical pores were observed inside the layered cross section, whereas relatively large irregular-shaped cavities were observed in layered boundaries. The tensile strengths of the G-layered and F-layered specimens were approximately 1800 and 1650 MPa, respectively. During bonding strength tests on an area bonded with S45C base metal, a fracture occurred in one case because of the lack of fusion at the boundary, and the F-layered specimens showed a lower strength than the G-layered ones. During wear tests on a quenched 1.5 GPa-grade aluminized steel plate, the F-layered specimens showed lower wear loss. However, the G-layered specimens showed better wear resistance during wear tests on a 1.5 GPa-grade electrogalvanized steel plate. These findings serve as fundamental data for additive manufacturing processes using tool steels of high-strength materials with high melting points.

Effects of different alloying elements on the hardness profile of nitrided hot-work tool steels

2006 ◽  
Vol 151 (3) ◽  
pp. 105-109 ◽  
Author(s):  
R. Schneider ◽  
H. Schweiger ◽  
G. Reiter ◽  
V. Strobl
Keyword(s):  
Alloying Elements ◽  
Hardness Profile ◽  
Tool Steels ◽  
Hot Work Tool Steels

Characterization of Heat Transfer Coefficients of Tool Materials and Tool Coatings for Hot Stamping of Boron-Manganese Steels

2010 ◽  
Vol 438 ◽  
pp. 81-88 ◽  
Author(s):  
Michael Wieland ◽  
Marion Merklein
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Hot Stamping ◽  
High Strength Steels ◽  
High Strength ◽  
Tool Steels ◽  
Transfer Coefficients ◽  
Element Analysis ◽  
Coated Tool

One characteristic of hot stamping of ultra high strength steels is the high wear rate of the used tools which leads to shorter tool life. Coatings improving wear resistance can increase the lifetime of the used tools but process relevant data such as the heat transfer capability of coated tool steels are missing. Within this paper the heat transfer capabilities of coated tool steels for the hot stamping processes are determined. Therefore different coating systems based on AlCrN are applied on the tool steels and the pressure dependent heat transfer coefficient is determined using process relevant conditions. As semi-finished blank the hot stamping steel 22MnB5 with an aluminum-silicon pre-coating is used. With respect to a finite element analysis of the forming operation of the hot stamping process the heat transfer coefficient represents an important input data for the process layout.

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