The effect of processing parameters on the properties of multi-phase advanced high strength steel grades

工艺参数对多相先进高强度钢性能的影响

• 批准号: 2285541
• 金额: --
• 依托单位: Swansea University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2285541
• 关键词: effect; processing; parameters; properties; multi

Research Area: Materials Engineering - metals and alloysCarmakers are continuously evolving and developing new solutions to make better cars, which are more fuel efficient, affordable and safer. The development of steel grades is a key contributor towards the evolution of the automobile industry. There has been a sea change in automotive steel grades over recent years, and steel makers should be prepared to serve the growing automobile industry.Tomorrow's car must be safe, environmentally friendly, durable and cheap. As a result, the requirement of steel for these cars is to be:. High-strength steel to limit weight and preserve safety. Galvanised for durability. Produced with reduced operational costsProduction of new steel grades for the automotive industry through robust industrial process in-order to ensure consistently identical mechanical properties is, in itself a challenge to steel producers.Over years, strip processing line technologies have evolved to match the new requirements of steel grades. Subsequently, new steel grades demanded more sophisticated thermal cycles and thermal technologies. Today, we can identify three major milestones:. 2000: Dual Phase (DP)-grades requesting rapid cooling stages. 2007: New grades, such as TRIP (Transformation Induced Plasticity), must be processed on the same continuous galvanising line (CGL) that processes DP grade steels. . 2012: Higher mechanical properties (TS greater than 1000 MPa) using multi-phase steel grades, such as Quenching & Partitioning, require additional after-soaking heat-treatment together with a higher annealing temperature.Each stage of the thermal cycle will influence the mechanical properties of the steel. Processing of new AHSS (Advanced High strength Steel) grades increases in complexity after the soaking stage of the process as the requirements of the thermal cycle are different for every family of AHSS. Therefore, a continuous galvanising line (CGL) needs to have enough flexibility to process all these grades.Since SUK-PT is preparing for an investment in its existing CAPL for making it a "swing-line" to combine CGL and CAL capabilities, detailed knowledge on the processing of new AHSS grades for Automotive is a must for a robust industrial process. This PhD proposal aims to generate knowledge on "The effect of processing parameters on the properties of multi-phase AHSS-grades having a mixed microstructure of Tempered Martensite and Tempered Bainite".

研究领域：材料工程-金属和合金汽车制造商正在不断发展和开发新的解决方案，以制造更好的汽车，这是更省油，负担得起和更安全。钢种的发展是汽车工业发展的关键因素。近年来，汽车用钢的牌号发生了翻天覆地的变化，钢铁制造商应该做好准备，为不断发展的汽车工业服务。未来的汽车必须安全、环保、耐用、廉价。因此，这些汽车对钢材的要求是：高强度钢，以限制重量和保护安全。镀锌的耐用性。降低生产成本通过强大的工业流程生产汽车行业的新钢种，以确保一致的机械性能，这本身就是钢铁生产商面临的一个挑战。多年来，带钢加工线技术不断发展，以满足钢种的新要求。随后，新的钢种需要更复杂的热循环和热技术。今天，我们可以确定三个主要里程碑：2000：双相（DP）-要求快速冷却阶段的牌号。2007年：新牌号，如TRIP（相变诱发塑性），必须在加工DP级钢的同一条连续镀锌线（CGL）上进行加工。. 2012年：使用多相钢牌号（如淬火和分配）获得更高的机械性能（TS大于1000 MPa），需要额外的后均热处理以及更高的退火温度。热循环的每个阶段都会影响钢的机械性能。在工艺的均热阶段之后，新AHSS（高级高强度钢）等级的加工复杂性增加，因为每个AHSS系列的热循环要求不同。因此，连续镀锌生产线（CGL）需要有足够的灵活性来处理所有这些牌号。由于SUK-PT正准备投资现有的CAPL，使其成为一条“摆动生产线”，以结合联合收割机CGL和CAL能力，因此，对汽车用新AHSS牌号的加工有详细的了解是一个强大的工业流程的必要条件。该博士论文旨在产生关于“工艺参数对具有回火马氏体和回火贝氏体混合微观结构的多相AHSS等级性能的影响”的知识。