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为研究非真空环境下复合轧制的实验工艺,对某种低碳微合金钢组坯在氩气环境下焊接后进行复合轧制,对轧后复合板界面结合处进行组织以及力学性能检测。非真空轧制板材具有少量的缺陷并集中于板材末端;界面结合处未发现原始痕迹,且无由于氧化而产生的孤立状非结合部位;结合度实验未发现肉眼可见的剥离裂纹;界面结合强度实验表明界面结合强度随累计压下率的增加而增加;对拉剪位置断裂的断口分析可知,在压下率较低时界面结合处保持原有试样形貌,且断口处未发现夹杂物。实验结果表明非真空复合轧制实验工艺板材力学性能良好。
In order to study the experimental process of composite rolling in non-vacuum environment, the composite rolling of a certain kind of low carbon microalloyed steel billets after welding in argon atmosphere was carried out, and the microstructure and mechanical properties of the bonded joints of rolled composite plates were tested. Non-vacuum rolled sheet with a small number of defects and focus on the end of the plate; no trace of the original interface was found, and no isolated due to oxidation of non-binding sites; test results showed no visible naked peel crack; interfacial bonding strength Experiments show that the interfacial bonding strength increases with the increase of the cumulative reduction rate. The fracture analysis of the tensile shear position shows that the interfacial bond maintains the original morphology of the sample at the low reduction ratio and no inclusions are found at the fracture . The experimental results show that the mechanical properties of non-vacuum composite rolling process plate is good.