锆4合金交叉焊点的脉冲激光焊接特性

采用脉冲Nd:YAG激光对锆4合金的十字交叉焊点进行试验研究，从焊点形貌、焊点成形系数和力学性能方面，研究了脉冲激光工艺参数对锆4合金十字交叉点焊的影响规律。研究表明：脉冲能量较小时，激光热量输入不能充分熔化交叉焊点预留凸台，焊点余高较大，无法满足实际应用要求。在单位脉冲能量一定的前提下增大峰值功率减小脉冲宽度，或增大激光脉冲的发射个数均可改善焊点的成形，减小焊点余高，得到较大的焊点深宽比。十字交叉焊点的最大拉伸载荷与焊点的深宽比成正比关系。

Abstract

A study on intersected points of Zircaloy-4 alloy is carried out by using pulsed Nd:YAG laser. The effects of laser parameters on the intersected points are analyzed from the appearances, depth-to-width ratio and mechanical properties. The results show that the protrusion of the weld beads can not meet the demand because the convex platform fails to be molten amply with the improper parameters. With the peak power increasing and the pulse width decreasing, or the number of shots increasing when the single pulse energy remains unchanged, the protrusion of the weld beads decreases, and the depth-to-width ratio of the weld beads increases. The maximum tensile loads of the intersected points are proportional to the depth-to-width ratio.

参考文献

[1] 杨文斗. 反应堆材料学［M］. 北京: 原子能出版社, 2000. 18-20.

Yang Wendou. Reactor Materials Science［M］. Beijing: Atomic Energy Press, 2000. 18-20.

[2] K N A P Kumar, J A Szpunar, Z He. Microstructural studies and crystallographic orientation of different zones and δ-Hydrides in resistance welded Zircaloy-4 sheets［J］. J Nuclear Materials, 2011, 414(3): 341-351.

[3] H H Kim, J H Kim, J Y Moon, et al.. High-temperature oxidation behavior of Zircaloy-4 and Zirlo in steam ambient［J］. J Materials Science and Technology, 2010, 26(9): 827-832.

[4] A Yilmazbayhan, E Breval, A T Motta, et al.. Transmission electron microscopy examination of oxide layers formed on Zr alloys［J］. J Nuclear Materials, 2006, 349(3): 265-281.

[5] W Qin, C Nam, H L Li, et al.. Tetragonal phase stability in ZrO2 film formed on zirconium alloys and its effects on corrosion resistance［J］. Acta Material, 2007, 55(5): 1695-1701.

[6] A R Shankar, V R Raju, R M Narayana, et al.. Corrosion of Zircaloy-4 and its welds in nitric acid medium［J］. Corrosion Science, 2007, 49(9): 3527-3538.

[7] S Tonpe, N Saibaba, A R Shankar, et al.. Process development for fabrication of Zircaloy-4 dissolver assembly for reprocessing of spent nuclear fuel［J］. Energy Procedia, 2011, 7: 459-467.

[8] 张旭东, 陈武柱, 陈加瑞, 等. 锆-4合金的激光焊接研究［J］. 应用激光, 1999, 19(5): 279-284.

Zhang Xudong, Chen Wuzhu, Chen Jiarui, et al.. Laser beam welding of Zircaloy-4［J］. Applied Laser, 1999, 19(5): 279-284.

[9] 赵异萍. 激光焊接工艺参数对锆4合金焊缝成形的影响［J］. 太原重型机械学院学报, 1999, 20(3): 224-229.

Zhao Yiping. The influence of laser welding technology parameters on welding seal of Zr-4 alloy［J］. J Taiyuan Heavy Machinery Institute, 1999, 20(3): 224-229.

[10] K N Song, S S Kim, S H Lee, et al.. Laser welding unit for intersection line welding of spacer grids inner straps and its application［J］. J Laser Micro/Nanoengineering, 2009, 4(1): 11-17.

[11] 陈彦宾. 现代激光焊接技术［M］. 北京: 科学出版社, 2005. 71-72.

Chen Yanbin. Modern Laser Welding Technology［M］. Beijing: Science Press, 2005. 71-72.

蔡创, 李瑞丰, 陶汪, 李俐群, 赵辉荣, 侯雪, 闫相和. 锆4合金交叉焊点的脉冲激光焊接特性[J]. 中国激光, 2013, 40(8): 0803008. Cai Chuang, Li Ruifeng, Tao Wang, Li Liqun, Zhao Huirong, Hou Xue, Yan Xianghe. Characteristics of Laser Pulsed Welding at Intersected Points of Zircaloy-4 Alloy[J]. Chinese Journal of Lasers, 2013, 40(8): 0803008.

锆4合金交叉焊点的脉冲激光焊接特性

关于本站 Cookie 的使用提示

全站搜索

锆4合金交叉焊点的脉冲激光焊接特性

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索