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DEVELOPMENT OF AN ULTRA HIGH STRENGTH THERMO-MECHANICALLY PROCESSED AND CONTROL COOLED BAINITIC STEEL

机译:超高强度热机械控制贝氏体钢的研制

摘要

The present invention disclosed an ultra-high strength steel for structural components, a process of making such steel that has a desirable microstructure in the thermo-mechanically processed and differently cooled conditions that delivers high fatigue performance in service, and a process of making forged components using such steel. The steel and the process of its manufacturing enables manufacture of components that exhibit bainitic microstructure that impart ultra-high strength ranges with very high fatigue performance. The invention enables saving in alloying additives compared to hardened and tempered alloy steels and in addition avoid expensive heat treatment operations to achieve the desired range of mechanical properties. The steel of the invention is a suitable replacement for micro alloyed steel or heat treated steel bars used for structural component development. The steel can be used for applied as the hot rolled and air cooled long products that can be directly used for applications or it can be directly hot forged in open or closed die forging followed by controlled cooling to achieve the desired microstructure and range of mechanical properties.
机译:本发明公开了一种用于结构部件的超高强度钢,制备这种钢的方法,该方法在热机械加工和不同冷却条件下具有理想的显微组织,从而在使用中具有很高的疲劳性能,以及一种锻造部件的方法。使用这种钢。这种钢及其制造工艺可以制造出具有贝氏体微观结构的零件,这些零件具有极高的疲劳性能,可提供超高强度范围。与硬化和回火的合金钢相比,本发明能够节省合金添加剂,并且另外避免了昂贵的热处理操作以达到期望的机械性能范围。本发明的钢是用于结构部件开发的微合金钢或热处理的钢筋的合适替代品。该钢可用作直接用于应用的热轧和风冷长材,也可以在开式或闭式模锻中直接热锻,然后进行受控冷却以达到所需的显微组织和机械性能范围。

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