材料强度对爆炸焊接结合界面的影响

曾翔宇; 李晓杰; 曹景祥; 王小红; 闫鸿浩

doi:10.11883/bzycj-2018-0400

材料强度对爆炸焊接结合界面的影响

doi: 10.11883/bzycj-2018-0400

曾翔宇^1,,
李晓杰^{1, 2, ,},
曹景祥³,
王小红¹,
闫鸿浩¹

1.
大连理工大学工程力学系，辽宁大连 116024
2.
大连理工大学工业装备结构分析国家重点实验室，辽宁大连 116024
3.
大连船舶重工集团爆炸加工研究所有限公司，辽宁大连 116021

基金项目: 国家自然科学基金（11672067，11672068）

详细信息

作者简介:
曾翔宇（1990－　），男，硕士，XYZeng225@163.com

通讯作者:
李晓杰(1963－　)，男，博士，教授，robinli@dlut.edu.cn

中图分类号: O389
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- 被引次数: 0
出版历程
- 收稿日期: 2018-10-18
- 修回日期: 2018-12-12
- 刊出日期: 2019-05-01

Interface characteristics of explosive welding for different strength plates

1.
Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, Liaoning, China
3.
Dalian Shipbuilding Industry Explosion Processing Research Institute Co., Ltd, Dalian 116024, Liaoning, China

摘要

摘要: 为了研究爆炸焊接结合界面机理及材料强度对爆炸焊接的影响，采用相同的爆炸焊接参数对不同强度的基板进行了爆炸焊接。通过光学显微镜、扫描电子显微镜以及数值模拟技术对焊接试样的形貌、缺陷以及焊接机理进行了分析。结果表明：当材料强度较低时，碰撞点动压与基板材料强度的比值较高，界面出现较大的塑性应变并生热，此时界面熔化区较大，在焊接过程中可以将界面等效为不可压缩流体；当材料强度较高而碰撞点动压与基板强度的比值较低时，试样界面形貌受材料强度的影响较大。随着材料强度的上升，周期性的波状界面逐渐趋于平直。界面熔化现象减弱但温升速率较高，并受碰撞点附近高压出现热失稳现象形成剪切带及裂缝。此时材料强度的影响不可忽略，界面不能等效为不可压缩流体。
- 爆炸焊接 /
- 材料强度 /
- 界面形貌
Abstract: This work studies the effect of base plate initial tensile strength on interface morphology and welding quality in explosive welding. The plates with different initial tensile strength were fabricated via explosive welding method under the same parameters. The microstructure of the interface for the explosive welding sample was analyzed, and the results showed that the interface of the explosive welding sample was greatly influenced by the strength of the material, the interface was formed of over-melted, periodic ripples and finally flattening with the increasing strength of the material. Combined with the numerical simulation results, it is found that the interface melting zone is large and can be considered as an incompressible fluid for analysis when the specific pressure of explosive welding is high. When the specific pressure is low, the local temperature rising speed of the welded sample will be higher and the adiabatic shear zone will be formed under the action of plastic strain, although the interface will still melt. The strength of the material cannot be neglected for the explosive welding.
- explosive welding /
- material strength /
- interface morphology

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图 1 爆炸焊接平行布置图

Figure 1. Schematic illustration of explosive welding condition

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图 2 爆速测试结果

Figure 2. Experimental results of detonation velocity

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图 3 爆炸焊接数值模拟模型

Figure 3. Model of explosive welding in simulation

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图 4 不同强度基板焊接试样界面

Figure 4. Comparison of interfacial morphologies among different specimens

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图 5 基板1界面铸造组织的SEM图

Figure 5. SEM images of specimen 1

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图 6 数值模拟界面形貌

Figure 6. Numerical simulation interface morphology

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图 7 界面温度分布

Figure 7. Temperature distributions at interfaces

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表 1 基板参数

Table 1. Parameters of base plates

基板	σ_b/MPa	H_V
1	357	105
2	895	268
3	1 529	449
4	2 588	760

下载: 导出CSV

表 2 各焊接试样界面波参数

Table 2. Interface wave parameters ofdifferent welding specimens

基板	幅值/μm	波长/μm
2	180.2	396.8
3	148.8	567.5
4	70.0	402.5

下载: 导出CSV

参考文献(11)

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