Quenchability improvement and control simplification by ice mandrel in hot stamping of ultra-high strength steel hollow parts
Quenchability improvement and control simplification by ice mandrel in hot stamping of ultra-high strength steel hollow parts
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DOI：
10.1016/j.jmapro.2021.02.037
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发表时间：
2021-02-26
影响因子：
6.2
通讯作者：
Mori, Ken-ichiro
中科院分区：
文献类型：
--
作者：
Talebi-Anaraki, Ali;Maeno, Tomoyoshi;Mori, Ken-ichiro
为了生产超高强度钢制空心件，减轻汽车车身重量，提高汽车碰撞安全性，开发了一种采用冰芯棒和电阻加热的可淬火钢管热冲压工艺。为了解决中空制品冲压过程中出现的屈曲和冷却速率低的问题，在管内插入冰芯轴。研究了冰心轴对加热和成型行为的影响。通过添加纸作为隔热材料，可淬火充冰钢管能够加热到奥氏体化温度以上。而且，冰芯轴通过产生反作用力来防止充冰管的压曲并增加充冰管模具淬火后的硬度，从而简化了控制过程。使用带有绝缘纸的冰芯轴对于生产超高强度空心制品效果显着。
To produce ultra-high strength steel hollow parts for reducing the body weight and improving the collision safety of automobiles, a hot stamping process of quenchable steel tubes using ice mandrel and resistance heating was developed. To solve the problem of buckling and low cooling rate during stamping of hollow products, an ice mandrel was inserted in the tube. The effect of the ice mandrel on heating and forming behavior was investigated. Quenchable ice-filled steel tubes were able to heat over austenitizing temperature by adding papers as thermal insulation. Moreover, the ice mandrel simplifies the controlling process by generating a reaction force to prevent the buckling and increase the hardness after die quenching of the ice-filled tubes. Using the ice mandrel with insulating papers is significantly effective to produce ultra-high strength hollow products.