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爆炸焊接304/Q245復(fù)合鋼界面結(jié)構(gòu)及剪切行為各向異性研究
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南昌大學(xué)機電工程學(xué)院,南昌大學(xué)機電工程學(xué)院

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國家自然科學(xué)基金資助(項目號11662010, 11202093)


Study of the Heterogeneity on Interface Structure and Shear Performance for the 304 Stainless Steel /Q245 Steel Explosive Welding Plate
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School of Mechanical Electrical Engineering,Nanchang University,School of Mechanical Electrical Engineering,Nanchang University

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    摘要:

    以304不銹鋼 /Q245普碳鋼焊接界面為研究對象,本文系統(tǒng)地探討了界面結(jié)構(gòu)不均勻性及其對服役行為的影響。研究過程中首先觀察橫截面、縱剖面結(jié)構(gòu)的不均勻性,并基于非平衡運動方程,解釋界面結(jié)構(gòu)產(chǎn)生不均勻性的機理。進一步,針對界面波的方向特性,測試其剪切行為隨定位角變化特征。最后利用SEM觀察剪切斷口形貌,認(rèn)識界面結(jié)構(gòu)對其斷裂模式影響。研究表明,爆炸焊接裝藥爆轟壓力脈動是導(dǎo)致界面結(jié)構(gòu)不均勻性的根本原因,而界面波延展方向決定了斷裂失效模式和損傷裂紋擴展行為；此外,本文獲得了界面最優(yōu)剪切強度承載方向,可指導(dǎo)爆炸復(fù)合材料應(yīng)用于工程實踐。

    Abstract:

    The 304 stainless steel/Q245 carbon steel explosive welding interface was taken as the research object to systematically detect the structure heterogeneity and its effect on the shear behavior in engineering application. First, characters on the transverse section and longitudinal section of the welding interface were detected. And based on the non-equilibrium theory, the mechanism of the heterogeneity on the welding interface has been explained. Furthermore, taking into account the wavy structure and its undulance along the detonation direction, shear performances varied with orientation angles were measured according to the national standard (GB/T 6396-2008). Finally, the morphologies of fracture surface were observed by SEM to recognize the influence of welding interface structure on the failure mode. Results show out that the explosive detonation pressure fluctuation is the fundamental cause of the inhomogeneity on the welding interface, the failure mode and cracks developments were determined by the undulation characters of wavy interface. Besides, an optimal orientation angle, on which samples have the maximum shear strength, was revealed. All of them can be used to guide the engineering application for explosive welding plates.

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付艷恕,王震.爆炸焊接304/Q245復(fù)合鋼界面結(jié)構(gòu)及剪切行為各向異性研究[J].稀有金屬材料與工程,2018,47(8):2458~2464.[Fu Yanshu, Wang Zhen. Study of the Heterogeneity on Interface Structure and Shear Performance for the 304 Stainless Steel /Q245 Steel Explosive Welding Plate[J]. Rare Metal Materials and Engineering,2018,47(8):2458~2464.]
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  • 收稿日期:2016-08-18
  • 最后修改日期:2016-10-19
  • 錄用日期:2016-11-11
  • 在線發(fā)布日期: 2018-10-17
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