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发明公开
CN104250677A 热成形且加压淬火的纵梁及其制造方法 有权

热成形且加压淬火的纵梁及其制造方法
摘要：
本发明涉及一种热成形且加压淬火的纵梁及其制造方法。该纵梁通过热成形以及加压淬火制成，该纵梁(1)在加压淬火之后具有至少两个不同强度的区域。第一类区域(2)具有主要为贝氏体的组织，第二类区域(3)具有主要为马氏体的组织，在第一类区域(2)和第二类区域(3)之间的过渡区域(4)小于80mm，所述第一类区域(2)构造在纵梁(1)的、在碰撞情况下应受到特别强的变形和/或应通过变形卸除碰撞能量的区域中，所述第一类区域(2)具有10～30％之间的延伸性能A50，在过渡区域(4)中的屈服极限和/或抗拉强度以每10mm大于100N/mm2的梯度递减或递增，所述第二类区域(3)具有大于1000N/mm2的强度。
摘要（英）：

The present invention relates to a hot-formed and press-hardened longitudinal beam and a manufacturing method thereof. The longitudinal beam (1) is formed through a hot-formed and press-hardened mode and has at least two regions of different hardness. A first region (2) is provided with tissues mainly of bainite; a second region (3) is provided with tissues mainly of martensite; a transition region (4) between the first region (2) and the second region (3) is less than 80 mm. In a region where the longitudinal beam (1) is greatly deformed under collision and/ or removes collision energy through deformation, the first region (2) is configured to have extending performance A50 between 10% and 30%; a yield limit and/ or tensile strength in the transition region (4) decreases or increases with a gradient greater than 100N/mm2 per 10 mm; the second region (3) has a strength greater than 1000 N/mm2.

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