Influence of Delta Phase Morphology in Galvannealed Coated Steels on Formability
Influence of Delta Phase Morphology in Galvannealed Coated Steels on Formability
复制标题
合金化镀锌钢中 Delta 相形态对成形性能的影响
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
H. Hahn
中科院分区：
文献类型：
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作者：
S. Sriram;V. Krishnardula;H. Hahn
众所周知，镀层的微观结构会影响合金化热镀锌钢的摩擦性能和成形性。在文献中有几项研究描述了不同涂层相（例如γ相、δ相和ζ相）对压制成形性的影响。在本研究中，作者研究了表面形态的影响，特别是对冲压成形性的镀锌合金化涂层的δ相。进行可成形性测试，包括（a）完全金属锁定和（B）模具中的显著金属移动的条件。结果发现，立方三角形涂层似乎表现更好（减少分裂），在成形操作中，伴随着显着的滑动压边区域比棒三角形涂层。本文介绍了具有不同δ相形态的样品的可成形性评价的结果，以及与传统上用于评价表面行为（如摩擦行为和表面粗糙度）的措施的相关性。
It is well known that coating microstructure can affect the frictional behavior and the formability of galvannealed steels. Several studies are available in literature describing the influence of different coating phases, such as, gamma, delta and zeta phases, on press formability. In the present study, the authors have investigated the effect of the surface morphology, specifically of the delta phase of galvannealed coating on press formability. Formability tests including conditions of (a) complete metal lockdown and (b) significant metal movement in the dies were conducted. It was found that cubic delta coatings seem to perform better (reduced splitting) in forming operations which are accompanied by significant sliding in the blankholder area than rod delta coatings. This paper presents the results of the formability evaluation for samples with different delta phase morphology and correlation with traditionally used measures for evaluation of surface behavior such as the frictional behavior and surface roughness.