Publication Date:
2018-09-22
Description:
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 of martensite can be locally suppressed. This process known as tailored tempering is accompanied by decreasing tensile strength. Regarding its lightweight potential, 22MnB5 is reaching its limits and new materials come into focus. Promising potential to fulfil the mentioned demands is offered by carbon-martensitic chromium steels. Besides improved tensile strength and elongation at break, this material series has further advantages. Due to its low critical cooling rate, the formation of martensite is achieved in the hot stamping process as well as by cooling at ambient temperature. Moreover, the low martensite-start-temperature allows...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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