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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Microstructure, mechanical properties and interface bonding mechanism of hot-rolled stainless steel clad plates at different rolling reduction ratios
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Microstructure, mechanical properties and interface bonding mechanism of hot-rolled stainless steel clad plates at different rolling reduction ratios

机译：热轧不锈钢包层板不同轧制减少比的微观结构，力学性能和界面粘合机理

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摘要

The microstructure, interfacial characteristics, shear behavior, tensile properties and fracture morphologies of stainless steel clad plates fabricated by vacuum hot rolling at different rolling reduction ratios of 20%, 40%, 70%, 90% and 93.75% are investigated using optical microscope (OM), ultra-depth microscope, scanning electron microscope (SEM), electron probe microanalysis (EPMA) and universal testing in detail. With the increasing rolling reduction ratio, the refinement degree of microstructure is increased, while the thicknesses of interface alloy element diffusion zones including the decarburized, carburized layers and martensite zone are decreased. Due to the different interface bonding status, the shear fracture of clad plate rolled at a low reduction ratio of 40% is located at interface, while clad plates with high reduction ratios of 70% and 90% fracture at the decarburized layers. Therefore, interface shear strength is sharply and then slightly increased. Moreover, the interface bonding strength, tensile strength and interface deformation coordination are increased, while fracture elongation is increased firstly and then decreased with the increasing rolling reduction ratio, which are attributed to the competing mechanisms of grain refinement, work hardening, interface strengthening and intergranular cracks of carburized layer. Overall, the interfacial bonding mechanism can be related to the Mn-Si oxide inclusions rupture, alloying elements diffusion, phase transition and severe plastic deformation at high rolling temperature. (C) 2018 Elsevier B.V. All rights reserved.
机译：微观结构，界面特性，抗剪性能，拉伸性能和不锈钢复合板断口形貌以20％，40％，70％，90％和93.75％的不同压下率制造通过真空热轧使用光学显微镜（调查OM），超深度显微镜，扫描电子显微镜（SEM），电子探针显微分析（EPMA）和详细万能试验。与压下率的增加，显微组织的细化程度增加，而界面合金元素扩散区包括脱碳，渗碳层和马氏体区域的厚度减小。由于不同的接口接合状态，在40％的低压缩比进行轧制复合板的剪切断裂位于接口，同时与在脱碳层的70％和90％的高断裂减速比复合板。因此，界面剪切强度急剧然后略有增加。此外，界面粘合强度，拉伸强度和界面变形协调增加，而断裂伸长率是先增加后日益增加的压下率，这归因于晶粒细化，加工硬化，界面强化和晶间的竞争机制降低渗碳层的裂纹。总体而言，界面结合机构可以被相关的Mn-Si系氧化物夹杂破裂，在高的轧制温度合金元素扩散，相变和严重的塑性变形。 （c）2018年elestvier b.v.保留所有权利。

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