| 分流模挤压焊合区域的氧化物分布及焊合组织分析(英文) |
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| 引用本文： | 张新明,冯迪,史兴宽,刘胜胆. 分流模挤压焊合区域的氧化物分布及焊合组织分析(英文)[J]. 中国有色金属学会会刊, 2013, 23(3): 765-772. DOI: 10.1016/S1003-6326(13)62527-3 |
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| 作者姓名： | 张新明 冯迪 史兴宽 刘胜胆 |
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| 作者单位： | 中南大学材料科学与工程学院;中国航天二院23所 |
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| 基金项目： | Project(2012CB619501) supported by the National Basic Research Program of China;Project supported by the Chinese Defence Advance Research Program of Science and Technology |
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| 摘 要： | 利用有限元分析、扫描电子显微镜及金相实验研究分流模的锭接锭挤压条件下,型材纵、横向焊合区域的氧化物分布及焊缝微观组织。结果表明:氧化物仅存在于型材基体与横向焊合区域结合面;纵向焊缝表现为深色条纹状组织,包含在强剪切变形及高温条件下形成的粗大再结晶晶粒中;横向焊缝组织表现为晶粒度略小的等轴再结晶晶粒。
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| 关 键 词： | 分流模 挤压焊合 氧化物分布 焊合组织 |
| 收稿时间： | 2011-12-20 |
Oxide distribution and microstructure in welding zones from porthole die extrusion |
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| Xin-ming ZHANG,Di FENG,X ing-kuan SHI,Sheng-dan LIU. Oxide distribution and microstructure in welding zones from porthole die extrusion[J]. Transactions of Nonferrous Metals Society of China, 2013, 23(3): 765-772. DOI: 10.1016/S1003-6326(13)62527-3 |
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| Authors: | Xin-ming ZHANG Di FENG X ing-kuan SHI Sheng-dan LIU |
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| Affiliation: | 1.School of Materials Science and Engineering,Central South University,Changsha 410083,China;2.The 23rd Research Institute,The Second Academ y of China Aerospace,Beijing 100024,China |
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| Abstract: | The oxide distribution and microstructure in longitudinal and transverse welding zones during the billet-to-billet extrusion process through porthole die were adequately investigated by means of finite element method, scanning electron microscopy and optical microscopy. The results indicate that the oxides exist at the interface between the matrix and transverse welding zone rather than longitudinal welding seam. The longitudinal welding zone reveals a darker band including the largest grain with irregular shape due to the abnormal grain growth under the heavy shear deformation and high temperature. The transverse welding zone consists of equiaxed recrystallized grains which are a little finer than those in the longitudinal welding seam. |
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| Keywords: | porthole die extrusion welding oxide distribution welding microstructure |
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