C. Pfeffer's research while affiliated with Leibniz Universität Hannover and other places
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Publications (3)
Industrial product development today is faced with the challenge of achieving shorter creation cycles to keep up with international competition. This causes constantly changing requirements for the geometry of the components and thus for the used forming tools. These tools must be designed much faster so that customer requirements are met quickly,...
The heat-treatable steel 22MnB5 is used in hot stamping processes to produce high-strength body-in-white components. In this process, sheet blanks are conventionally heated in roller hearth furnaces and then hot-stamped, whereby strengths of 1,500 MPa can be achieved. Disadvantages of this process are the low plastic deformation of the material in...
Hot-stamped components are an important part in steel-intensive automobile lightweight design in which the use of the heat-treatable steel 22MnB5 has been established. However, the field of application is limited by the low elongation at break in the hardened state. In order to improve ductility and consequently the crash-performance, the formation...
Citations
... Furthermore, it was possible to reduce the deviation to 5 HV using a holding time of 3 seconds at the austenitizing temperature. Behrens [10] and Albracht et al. [11] developed a new coating and heating system for uncoated sheets of 22MnB5. In this process, uncoated sheets could be simultaneously heated and coated with a specially developed nickel-based coating. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/298893683249152-1448273215234_Q64/Bernd-Arno-Behrens.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/279142009458709-1443564049685_Q64/Ulrich-Hollaender.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/896453035716609-1590742467544_Q64/Lorenz-Albracht.jpg)
... После серии экспериментов в работе [2] был сделан вывод, что скоростной нагрев приводит к смещению кривых упрочнения на 40 -60 °С вверх по температурной шкале по сравнению с кривыми, полученными при печном нагреве. Изучено влияние различных скоростей охлаждения (от 3 до 100 К/с) во время горячей штамповки стали X46Cr13 на твердость, прочность и пластичность стали после закалки (1100 °C, 300 с) и после дополнительного отпуска (1100 °C, 300 с) [11]. Показано, что этот фактор не влияет на твердость: она находится на уровне около 700 HV 10 после закалки и 580 HV 10 после отпуска. ...
