Method for preparing hardened components of motor vehicle, involves cooling secondary portion of plate by forced convection, while plate is in holding position for predetermined time and then cured in mold form hardening tool

摘要

#CMT# #/CMT# The method involves heating the plate (5) made of steel in heating system (6) to a predetermined temperature, in two partial areas (7,8). The heated plate is positioned such that a primary portion (7) of the plate is located within the heating system, while the secondary portion (8) is located outside of the heating system. The plate is held for a predetermined time in the holding position (9), and then cured in a mold form hardening tool (13). The secondary portion of the plate is cooled by forced convection, while the plate is in the holding position. #CMT# : #/CMT# An independent claim is included for continuous furnace. #CMT#USE : #/CMT# Method for preparing hardened components of motor vehicle. #CMT#ADVANTAGE : #/CMT# The hot stamped components with different material properties can be prepared, and the process cycle time is optimized. The cooling speed and cooling rate in the sub-region can be increased by forced convection. The period, in which the plate in the holding position is held, can be reduced. The critical components with hardness in the secondary sub-region can be reduced. The air flow caused by free convection is aided by the suction of heated air so that cooling speed is increased and the cooling durations are reduced. The defined cooling conditions are produced, so that the cooling rate or cooling speed can be adjusted to the particular conditions. The hardened components with different structures in the sub-regions can be produced reliably. The process cycle time is minimized and the total quantity of the product per unit time is increased by reducing the cycle time. The transport device can be moved continuously so that reduction in the control effort of transport device of the continuous furnace can be achieved. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view illustrating the process of preparing hardened components. 5 : Plate 6 : Heating system 7 : Primary portion of plate 8 : Secondary portion of plate 9 : Holding position 13 : Mold form hardening tool.