Suppression of hydrogen-induced damage in 22MnB5 hot stamping steel by microalloying

2020 ◽  
Vol 256 ◽  
pp. 123729
Author(s):  
Wen Huang ◽  
Hairong Gu ◽  
Qinghua Liu ◽  
Tingzhi Si
Keyword(s):  
Hot Stamping ◽  
Hot Stamping Steel

scholarly journals Investigation of the Microstructural Evolution during Hot Stamping of a Carburized Complex Phase Steel by Laser-Ultrasonics

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1836
Author(s):  
Alexander Horn ◽  
Marion Merklein
Keyword(s):  
Microstructural Evolution ◽  
Hot Stamping ◽  
Laser Ultrasonics ◽  
Complex Phase ◽  
Finished Steel ◽  
Steel Sheets ◽  
Fine Grain ◽  
Martensitic Microstructure ◽  
Ultrasound Sensor ◽  
Hot Stamping Steel

Prior carburization of semi-finished steel sheets is a new process variant in hot stamping to manufacture parts with tailored properties. Compared to conventional hot stamping processes, a complex phase typed steel alloy is used instead of 22MnB5. Yet recent investigations focused on final mechanical properties rather than microstructural mechanisms cause an increase in strength. Thus, the influence of additional carburization on the microstructural evolution during hot stamping of a complex phase steel CP-W®800 is investigated within this work. The phase transformation behavior, as well as the grain growth during austenitization, is evaluated by in-situ measurements employing a laser-ultrasound sensor. The results are correlated with additional hardness measurements in as-quenched condition and supplementary micrographs. The experiments reveal that the carburization process significantly improves the hardenability of the CP-W®800. However, even at quenching rates of 70 K/s no fully martensitic microstructure was achievable. Still, the resulting hardness of the carburized samples might exceed the fully martensitic hardness of 22MnB5 derived from literature. Furthermore, the carburization process has no adverse effect on the fine grain stability of the complex phase steel. This makes it more robust in terms of grain size than the conventional hot stamping steel 22MnB5.

Enhancements on strength of body structure due to bake hardening effect on hot stamping steel

2018 ◽  
Vol 100 (1-4) ◽  
pp. 771-782 ◽  
Author(s):  
Marcos Roberto de Castro ◽  
Waldemar Alfredo Monteiro ◽  
Rodolfo Politano
Keyword(s):  
Hot Stamping ◽  
Body Structure ◽  
Bake Hardening ◽  
Hardening Effect ◽  
Hot Stamping Steel

A 2000 MPa grade Nb bearing hot stamping steel with ultra-high yield strength

2021 ◽  
Vol 801 ◽  
pp. 140419
Author(s):  
Jiangtao Liang ◽  
Hongzhou Lu ◽  
Leilei Zhang ◽  
Feng Li ◽  
Ronghua Cao ◽  
...  
Keyword(s):  
Yield Strength ◽  
Hot Stamping ◽  
High Yield ◽  
High Yield Strength ◽  
Hot Stamping Steel

Effect of Zr addition on phase transformation and precipitation in B-added hot stamping steel

2013 ◽  
Vol 19 (4) ◽  
pp. 629-635 ◽  
Author(s):  
Moon-Jo Kim ◽  
Hoon-Hwe Cho ◽  
Sung-Hwan Kim ◽  
Seung Man Nam ◽  
Seung-Ha Lee ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Hot Stamping ◽  
Zr Addition ◽  
Hot Stamping Steel

Effects of Quenching and Partitioning Process on Mechanical Properties of a Hot-Stamping Steel

2014 ◽  
Vol 788 ◽  
pp. 340-345 ◽  
Author(s):  
Ming Cheng ◽  
Hong Wu Song ◽  
Xin Li ◽  
Shi Hong Zhang ◽  
Ming Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Treatment Process ◽  
Volume Fraction ◽  
Hot Stamping ◽  
Quenching Temperature ◽  
Quenching And Partitioning ◽  
22Mnb5 Steel ◽  
Partitioning Time ◽  
Hot Stamping Steel ◽  
Quenching And Partitioning Process

As a novel heat treatment process, Q&P (quenching and partitioning) process can be applied to enhance the ductility of steels. In this paper, the effects of different parameters of Q&P process (such as quenching temperature, partitioning temperature and partitioning time) on mechanical properties and microstructure of 22MnB5 steel was investigated. Analysis demonstrated that austenite can be stabilized via Q&P process and the volume fraction of retained austenite increases with the partitioning temperature and the partitioning time. The mechanical properties of the steel can be controlled to acquire the steel with excellent strength-ductility balance by Q&P process.

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