Bilstein Thermotecsprings为汽车制造商节省了体重

车辆悬架弹簧的要求一直在增长。开发线圈弹簧的目标是最大程度地减少重量,优化包装空间,最大化强度并最小化成本。线圈弹簧的应力水平较高,因此强度更高,可以在保持零件寿命的同时进一步减轻体重。ThyssenKruppBilstein Suspension is a leader in the development of such innovative components.

In Europe vehicle suspension springs are now made almost exclusively from Si steels, replacing the previously used Cr steels in line with the trend toward higher strengths. Material developers are looking to improve ductility at strengths above 2050 MPa and optimize finishes (decarburizing). Steel can be optimized in several areas; changing the chemical composition can influence strength, sag resistance, toughness, heat treatability and corrosion resistance.

“高性能热能-TEC工艺(HPTP)”是过程开发中的一个里程碑,在滚动过程中,诱导奥斯丁化(热处理)之后是热力学形成。弹簧随后被缠绕并变硬。在热机械形成过程中的重结晶提供了出色的延展性和先前无法实现的强度水平为2200 MPa。Bilstein的Thermotecspring®大约是。轻15%,而较低的总弹簧高度可提供额外的节省重量潜力。

尽管可以显着增加碱性延展性,但具有超过2050 MPA的热处理强度需要特殊的表面保护,以防止腐蚀蚀到过早故障。一种解决方案是带有第一层(锌底漆)的DualProtect®涂层,以防止腐蚀和第二层以防止机械损伤(石材碎裂等)。Aluprotect®铝涂层为表面保护提供了替代方案。

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