问题描述：
英语翻译
Due to rising requirements regarding passenger
safety and weight reduction hot stamped components get
more and more important regarding security relevant
parts because of their high strength.Currently,the new
challenge is manufacturing components with locally adjusted
mechanical properties in order to simultaneously guarantee
structural integrity and energy absorption in case of
a crash.Therefore,the so called Tailored Tempering process
is a promising strategy controlling the cooling rate of the
austenitized blank by local heating of the tool and consequently
adjusting microstructure development and resulting
mechanical properties.As the adjustment of mechanical
properties is a temperature dependent process which is also
influenced by process parameters and contact conditions,
accurate process knowledge is essential.Within this paper
the influence of tool temperature and applied contact pressure
on the resulting heat transfer coefficient as well as
contact condition between the surfaces of former investigations
will be shown in a short overview.Based on the results
of these fundamental investigations,design principles for
Tailored Tempering process will be derived.Furthermore,a
hat-profile geometry will be investigated experimentally and
characterized by mechanical tests as well as geometrical
aspects like sheet thickness and distortion.Additionally,an
FE-Modell based on the results of the thermo-mechanical
characterization is build up and validated by comparison
with the results of experimental work.
Due to rising requirements regarding passenger
safety and weight reduction hot stamped components get
more and more important regarding security relevant
parts because of their high strength.Currently,the new
challenge is manufacturing components with locally adjusted
mechanical properties in order to simultaneously guarantee
structural integrity and energy absorption in case of
a crash.Therefore,the so called Tailored Tempering process
is a promising strategy controlling the cooling rate of the
austenitized blank by local heating of the tool and consequently
adjusting microstructure development and resulting
mechanical properties.As the adjustment of mechanical
properties is a temperature dependent process which is also
influenced by process parameters and contact conditions,
accurate process knowledge is essential.Within this paper
the influence of tool temperature and applied contact pressure
on the resulting heat transfer coefficient as well as
contact condition between the surfaces of former investigations
will be shown in a short overview.Based on the results
of these fundamental investigations,design principles for
Tailored Tempering process will be derived.Furthermore,a
hat-profile geometry will be investigated experimentally and
characterized by mechanical tests as well as geometrical
aspects like sheet thickness and distortion.Additionally,an
FE-Modell based on the results of the thermo-mechanical
characterization is build up and validated by comparison
with the results of experimental work.
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