Behavior of Forging Steels under Cyclic Loading—the Benefit of Air‐Hardening Martensites,Steel Research International

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Behavior of Forging Steels under Cyclic Loading—the Benefit of Air‐Hardening Martensites
Steel Research International ( IF 1.9 ) Pub Date : 2020-07-28 , DOI: 10.1002/srin.202000172
Tobias Schmiedl ₁ , Alexander R. M. Gramlich ₂ , Steffen Schönborn ₃ , Tobias Melz _{1,

3}

Affiliation

The development of air‐hardening martensitic forging (LHD: luft härtend duktil) steels offers high material performance with a short and simple process route. In this study, five alloys (L1–L5), based on the existing LHD alloy concept but with different contents of aluminum, titanium, boron, and molybdenum, are cast at laboratory scale. The casted blocks are hot forged into semifinished products and cooled in air (uncontrolled). The tensile properties, the Charpy V‐notch impact energy, the cyclic material behavior, and the fatigue strength of the alloys L1–L5 are opposed to each other. Furthermore, the material properties are compared with the standard quench and tempered (Q+T) steel 42CrMo4 (reference material) and ranked against previously developed forging steels. The tensile properties and Charpy V‐notch impact energy are comparable with those of the reference material, whereas the new alloy concepts show a significantly higher cyclic yield strength and fatigue strength.

中文翻译：

循环载荷作用下锻钢的行为-强化空气硬化马氏体的益处

空气硬化马氏体锻造（LHD：lufthärtendduktil）钢的开发以短而简单的工艺路线提供了高材料性能。在这项研究中，以现有的LHD合金概念为基础，以实验室规模铸造了五种合金（L1-L5），但其中铝，钛，硼和钼的含量不同。将铸造的块热锻成半成品，然后在空气中冷却（不受控制）。合金L1-L5的拉伸性能，夏比V型缺口冲击能，循环材料性能和疲劳强度彼此相对。此外，将材料性能与标准淬火和回火（Q + T）钢42CrMo4（参考材料）进行比较，并与先前开发的锻造钢进行比较。

更新日期：2020-07-28

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