药芯割丝水下湿式电弧切割割口成形及热影响区组织分析
发布时间：2018-07-25 19:34
【摘要】：针对水下作业发展的需要,利用药芯割丝进行了水下湿式电弧切割试验,分析了水下电弧切割过程中切割电压、电流及切割速度对割口成形的影响规律,并研究了割口热影响区的显微组织.结果表明,药芯割丝水下电弧切割过程中电弧长度、割丝伸出长度在不停变化;割口下口基本较上口宽;随切割电压或电流的增大,割口上下宽度均有所增加;随切割速度的增大,割口下口宽度逐渐变小.同时发现,由于水下冷却速度较快,割口热影响区较窄,可分为重熔区、过热区、完全再结晶区与不完全再结晶区等区域.
[Abstract]:In order to meet the need of underwater operation development, the underwater wet arc cutting test was carried out by using core-cutting wire, and the influence of cutting voltage, current and cutting speed on the forming of the cutting mouth was analyzed in the process of underwater arc cutting. The microstructure of the heat affected zone was studied. The results show that the arc length and the extension length of the cutting wire are constantly changing during the underwater arc cutting of the cored wire, the lower end of the cut is wider than that of the upper, and the upper and lower width of the cut increases with the increase of the cutting voltage or current. With the increase of cutting speed, the width of the cut mouth becomes smaller. At the same time, it is found that because of the rapid underwater cooling rate, the heat affected zone of cutting mouth is narrower, which can be divided into remelting zone, overheating zone, complete recrystallization zone and incomplete recrystallization zone.
【作者单位】： 江苏科技大学先进焊接技术省级重点实验室;上海振华重工启东海洋工程股份有限公司;南京航空航天大学材料科学与技术学院;
【基金】：国家自然科学基金资助项目(51305173) 中国博士后科学基金面上项目(2014M550289,2015M580423);中国博士后科学基金特别资助项目(2015T80548,2016T90453) 江苏省青蓝工程中青年学术带头人资助项目 江苏高校优势学科建设工程资助项目
【分类号】：TG484
本文编号：2144852
[Abstract]:In order to meet the need of underwater operation development, the underwater wet arc cutting test was carried out by using core-cutting wire, and the influence of cutting voltage, current and cutting speed on the forming of the cutting mouth was analyzed in the process of underwater arc cutting. The microstructure of the heat affected zone was studied. The results show that the arc length and the extension length of the cutting wire are constantly changing during the underwater arc cutting of the cored wire, the lower end of the cut is wider than that of the upper, and the upper and lower width of the cut increases with the increase of the cutting voltage or current. With the increase of cutting speed, the width of the cut mouth becomes smaller. At the same time, it is found that because of the rapid underwater cooling rate, the heat affected zone of cutting mouth is narrower, which can be divided into remelting zone, overheating zone, complete recrystallization zone and incomplete recrystallization zone.
【作者单位】： 江苏科技大学先进焊接技术省级重点实验室;上海振华重工启东海洋工程股份有限公司;南京航空航天大学材料科学与技术学院;
【基金】：国家自然科学基金资助项目(51305173) 中国博士后科学基金面上项目(2014M550289,2015M580423);中国博士后科学基金特别资助项目(2015T80548,2016T90453) 江苏省青蓝工程中青年学术带头人资助项目 江苏高校优势学科建设工程资助项目
【分类号】：TG484
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