陈凯,马勇,何尧,等.C276/304L爆炸焊接复合板界面熔化区微观组织及形成过程[J].精密成形工程,2020,12(2):67-71.
CHEN Kai,MA Yong,HE Yao,et al.Microstructure and Formation of Melting Zone in the Interface of C276/304L Explosive Welding Composite Plate[J].Journal of Netshape Forming Engineering,2020,12(2):67-71. |
| C276/304L爆炸焊接复合板界面熔化区微观组织及形成过程 |
| Microstructure and Formation of Melting Zone in the Interface of C276/304L Explosive Welding Composite Plate |
| 投稿时间：2019-11-22 修订日期：2020-03-10 |
| DOI：10.3969/j.issn.1674-6457.2020.02.011 |
| 中文关键词: 爆炸焊接 C276/304L复合板 熔化区 温度场 数值模拟 |
| 英文关键词: explosive welding C276/304L composite plate melting zone thermal field numerical simulation |
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| 中文摘要: |
| 目的 探究C276/304L异种金属爆炸焊接过程中温度变化历程与界面微观组织形成的关系。方法 利用爆炸焊接工艺获得结合良好的复合板，观察测量复合界面的微观组织和显微硬度分布。运用ANSYS/AUTODYN数值模拟对界面形成过程进行分析，探究界面温度场变化与熔化区组织形成的内在联系。结果 对比模拟结果发现，界面在复合过程中存在高应变率及严重塑性变形而经历快速升温，界面升温速率可达2.35×109 ℃/s，这将导致局部区域材料发生熔化和混合，并在旋转作用下形成漩涡；而后经历快速冷却过程，冷却速率可达107~109 ℃/s，形成独特的熔化区组织。高温高压及高塑性变形导致熔化层产生的同时，对界面附近硬度也会产生影响。结论 熔化区组织的形成与复合过程中的高升温速率及冷却速率有关，同时界面因剧烈变形产生应变硬化。 |
| 英文摘要: |
| The paper aims to reveal the formation mechanism of melting zone in the interface of C276/304L bimetal. A well-combined composite plate was obtained by the explosive welding process, and the microstructure and microhardness distribution of the composite interface were observed and measured. ANSYS/AUTODYN numerical simulation was used to analyze the interface formation process, and to explore the inherent relationship between the change of the interface temperature field and the formation of the melting zone structure. The results showed that the materials of interface experienced rapid temperature rise due to high strain rate and severe plastic deformation in the composite process. The heating rate can reach ca. 2.35×109 ℃/s, which caused local material to melt and mix, and form vortex under the action of rotation. Then the melting material underwent a rapid cooling process, the cooling rate can reach 107-109 ℃/s, forming a unique microstructure. High temperature, high pressure and high plastic deformation lead to the formation of the melting zone, and also affect the interface hardness. This study verifies that the formation of the melting zone is related to the high heating rate and cooling rate in the composite process. Meanwhile, strain hardening of the interface for severe deformation was observed. |
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