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Applications of rapid thermal processing to advanced high strength sheet steel developments

机译：快速热加工在先进的高强度钢板发动中的应用

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摘要

Rapid thermal processing strategies, i.e. thermal histories that involve high heating rates, short times at peak temperatures, and subsequent rapid cooling by quenching, and that typically require significantly shorter total processing times than are utilized in conventional sheet steel processing, are reviewed to illustrate potential benefits and challenges for the production of new advanced high strength steel grades. A fundamental framework based on conventional induction heat treating often applied to rapidly selectively harden surfaces of steel components is highlighted to provide a basic structure for assessment of rapid thermal processing of sheet steels. Four sheet steel product groups were considered. These include dual-phase (DP) steels, quenched and partitioned (Q&P) steels, flash processed steels, and press hardened steels. In comparison to conventionally heat-treated steels, rapid processing of steels resulting in multi-constituent microstructures consisting of ferrite and martensite (DP) and also containing retained austenite (Q&P) result in enhanced strength-ductility combinations primarily due to microstructural refinement. Results indicate that flash processed and press hardening steels, both with primarily martensitic microstructures, exhibit properties largely similar to conventional quenched and low-temperature-tempered steels.
机译：快速热加工策略，即涉及高加热速率的热历史，峰值温度的短时间，并且随后通过淬火的快速冷却，通常需要比在传统钢板加工中使用的总处理时间明显较短，以说明潜力新型先进高强度钢等级生产的益处和挑战。突出了基于常规感应热处理的基本框架经常施加到钢部件的快速选择性硬化表面，以提供用于评估薄片钢的快速热处理的基本结构。考虑了四块钢板产品组。这些包括双相（DP）钢，淬火和分配（Q＆P）钢，闪存加工钢，并压制硬化钢。与常规热处理的钢进行比较，钢的快速加工导致由铁氧体和马氏体（DP）组成的多构成微观结构，并且还含有保留的奥氏体（Q＆P）导致增强的强度 - 延展性组合主要是由于显微结构细化的增强的强度 - 延展性组合。结果表明，闪蒸加工和压制硬化钢，既具有主要马氏体微观结构，也具有与常规淬火和低温钢化钢相似的特性。

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