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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Developments in Advanced High Strength Steels
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Developments in Advanced High Strength Steels

机译：先进高强度钢的发展

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Two major drivers for the use of newer steels in the automotive industry are fuel efficiency and increased safety performance. Fuel efficiency is mainly a function of weight of steel parts, which in turn, is controlled by gauge and design. Safety is determined by the energy absorbing capacity of the steel used to make the part. All of these factors are incentives for the U.S. automakers to use Advanced High Strength Steels (AHSS) to replace the conventional steels used to manufacture structural parts in the past. AHSS is a general term used to describe various families of steels. The most common AHSS is the dual phase steel that consists of a ferrite-martensite microstructure. These steels are characterized by high strength, good ductility, low yield to tensile strength ratio and high bake-hardenability. Another class of AHSS is the multi-phase steel which has a complex microstructure consisting of various phase constituents and a high yield to tensile strength ratio. Transformation Induced Plasticity (TRIP) steels is the latest class of AHSS steels finding interest among the U.S. automakers. These steels consist of a ferrite-baim'te microstructure with significant amount of retained austenite phase and show the highest combination of strength and elongation, so far, among the AHSS in use. High level of energy absorbing capacity combined with a sustained level of high n value up to the limit of uniform elongation as well as high bake hardenability make these steels particularly attractive for safety critical parts and parts needing complex forming. In this paper, recent developments in the U.S. in all these various classes of AHSS will be discussed. Finally, martensitic steels with very high strengths are also in use for certain parts.
机译：在汽车行业中使用新型钢的两个主要驱动因素是燃油效率和更高的安全性能。燃油效率主要取决于钢制零件的重量，而钢制零件的重量又受规格和设计控制。安全性取决于制造零件所用钢的能量吸收能力。所有这些因素都促使美国汽车制造商使用高级高强度钢（AHSS）替代过去用于制造结构零件的常规钢。 AHSS是用于描述各种钢种的通用术语。最常见的AHSS是由铁素体-马氏体微结构组成的双相钢。这些钢的特点是强度高，延展性好，屈服强度和屈服强度比低，烘烤硬化性高。 AHSS的另一类是多相钢，它具有由各种相组成组成的复杂微观结构，并且具有很高的屈服强度和拉伸强度比。相变感应塑性（TRIP）钢是最新的AHSS钢，在美国汽车制造商中引起了人们的兴趣。这些钢由具有大量残余奥氏体相的铁素体-贝氏体组织组成，是目前使用的AHSS中强度和伸长率最高的组合。高水平的能量吸收能力与高水平的n值（直至均匀伸长率的极限）的持续水平以及高烘烤硬化性相结合，使这些钢特别适合于安全关键型零件和需要复杂成型的零件。本文将讨论美国在AHSS的所有这些不同类别中的最新发展。最后，某些零件也使用了强度很高的马氏体钢。

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