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首页> 外文会议>New developments on metallurgy and applications of high strength steels >NEW GENERATION OF HIGH STRENGTH BAINITIC STEELS (HSBS) FOR LARGE FORGING AND AUTOMOTIVE COMPONENTS
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NEW GENERATION OF HIGH STRENGTH BAINITIC STEELS (HSBS) FOR LARGE FORGING AND AUTOMOTIVE COMPONENTS

机译：用于大型锻造和汽车零部件的新高强度贝氏体钢（HSBS）

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New High Strength Steels having a Bainitic microstructure (HSBS) have been designed for large truck parts or smaller automotive parts produced by hot forging and controlled cooling. rnThese steels can be used: rn- when other traditional micro alloyed steel grades cannot meet the requirements of the new parts designed for weight reduction. rn- when subsequent savings (cost, energy) are desired while maintaining equivalent or improved properties compared to quenched and tempered parts. In this case, these grades are an alternative to heat treated alloyed grades, such as NiCrMo or CrMo grades. rn- if the forger is not equipped with heat treatment facilities. rn- for parts with a new design, for example parts with shapes that could be sensitive to cracking or to distortion, if a classical quenching process is applied after forging. rnThe bainitic steel grades presented are readily applicable to parts that do not need induction hardening treatment after machining, some however are specially designed for parts requiring this treatment. rnThis presentation deals with the characteristics: mechanical properties, machinability, quenchability, hardenability Jominy and induction hardening characterisation and finally fatigue behaviour, of the new bainitic grades developed in our R&D centre. The CCT diagrams of a selection of these grades are presented and illustrated with numerous microstructures. Comparison between the microstructures observed on parts and those obtained after laboratory simulations are shown. Finally, our recommendations to achieve the parts are explained with a focus on the forging process control as well as on the machining process.
机译：具有贝氏体微结构（HSBS）的新型高强度钢已经设计用于大型卡车零件或通过热锻和受控冷却生产的较小汽车零件。可以使用这些钢：rn-当其他传统的微合金钢牌号不能满足为减轻重量而设计的新零件的要求时。 rn-与淬火和回火零件相比，在希望随后节省成本（成本，能源）的同时保持相同或改善的性能。在这种情况下，这些牌号可以替代热处理的合金牌号，例如NiCrMo或CrMo牌号。 rn-如果伪造者未配备热处理设施。 rn-对于具有新设计的零件，例如，如果锻造后采用经典的淬火工艺，则零件的形状可能对裂纹或变形敏感。 rn所介绍的贝氏体钢牌号适用于在加工后无需进行感应淬火处理的零件，但是有些是专门为需要这种处理的零件设计的。 rn本次演讲涉及我们研发中心开发的新型贝氏体不锈钢的机械特性，机械加工性，淬透性，淬透性，柔韧性和感应淬火特性以及最终的疲劳性能。这些等级的选择的CCT图以多种微观结构呈现和说明。显示了在零件上观察到的微观结构与实验室模拟后获得的微观结构之间的比较。最后，我们将重点介绍锻造过程控制以及机加工过程中提出的零件建议。

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