热成形淬火工艺中加热炉关键技术参数

Key technical parameters of heating furnace for hot forming quenching process

汽车轻量化是降低燃油消耗及减少排放的有效途径之一。为了给汽车用户提供最高等级的安全性能,同时又要实现汽车减重,现多数商用汽车制造商开始采用高强度轻重量的热成形零部件。然而根据热成形件质量的要求,需要着重考虑加热过程中的几个关键技术参数(温度均匀性,气氛保护,露点控制),并结合不同加热炉的结构特点,比较了相互的优缺点。结果表明,辊底式加热炉性能要优于多层箱式炉。

With the development trend of automobile energy saving, safety, environmental protection and comfort, the light weight of vehicle is the most effective way to reduce fuel consumption and reduce emissions. In order to not only provide the highest level of safety performance, but also achieve weight loss, now high strength light weight hot forming parts have been adopted by most commercial vehicle manufacturers.However, according to quality requirements of hot formed parts, some key technical parameters （temperature unifor- mity, oxidation protection and dew point controlling） of heating process have to be emphatically considered. By combining with structural characteristics of different heating furnace, respective advantages and disadvantages have been compared. The results show that performances of roller-hearth furnace are superior to multi-layer box-type furnace.