Tempering and Intercritical Annealing of Air‐Hardening 4 wt% Medium Manganese Steels
Tempering and Intercritical Annealing of Air‐Hardening 4 wt% Medium Manganese Steels
复制标题
空气淬火 4 wt% 中锰钢的回火和临界退火
DOI：
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发表时间：
2021
影响因子：
2.2
通讯作者：
W. Bleck
中科院分区：
文献类型：
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作者：
A. Gramlich;W. Bleck
介绍了含4 wt%Mn的锻造用中锰钢回火和亚温退火后的力学性能。在随后的空冷锻造后，进行热处理，特别是从2 5 0和4 5 0 °C回火，在6 0 0-6 75 °C之间进行亚温回火。测定了拉伸性能、夏比V型缺口冲击韧性和硬度，并与金相和同步辐射测量表征的显微组织特征进行了比较，从而将中锰钢分为六个不同的热处理阶段。此外，还讨论了不同合金化加入量(硼0.0016-0.0057 wt%、钼0.2 wt%、铝0.5 wt%)对力学性能的影响。结果表明，在回火区，硼能更有效地提高冲击韧性，而钼合金在临界区退火后表现出更高的韧性。大部分材料和热处理状态遵循韧性与强度的反比关系，而铝合金试件回火后表现出较好的韧性。
The mechanical properties after tempering and intercritical annealing of medium manganese steels with 4 wt% Mn for forging applications are presented. After forging with subsequent air cooling, heat treatments were performed, specifically tempering from 250 and 450 °C and intercritical annealing between 600 and 675 °C. Tensile properties, Charpy V‐notch impact toughness, and hardness were determined and compared with microstructural features characterized by metallography and synchrotron measurements, leading to the classification of six different heat treatment stages for medium manganese steels. Furthermore, the effects of different alloying additions (boron 0.0016–0.0057 wt%, molybdenum 0.2 wt%, and aluminum 0.5 wt%) are discussed with respect to the mechanical properties. It is shown that boron increases the impact toughness more effectively in the tempering regime, while the molybdenum alloyed samples exhibit higher toughness after intercritical annealing. Most of the materials and heat treatment states follow the inverse relationship between toughness and strength, while the aluminum alloyed samples show a superior toughness after tempering.