采用热电偶测温技术系统测定了6mm6082铝合金双轴肩搅拌摩擦焊试板各特征点的温度变化曲线,分析了双轴肩搅拌摩擦焊过程中焊接试板不同区域的温度场分布特征.双轴肩搅拌摩擦焊搅拌头上、下轴肩同时产热,比传统搅拌摩擦焊产热量大,且热输入方式及试板接触散热条件也有很大不同,因此,其稳定焊接速度较大,从而导致双轴肩搅拌摩擦焊试板温度场分布特征与传统搅拌摩擦焊明显不同.双轴肩搅拌摩擦焊过程分为加速焊接和稳定焊接两个阶段,起始阶段,随着焊接速度的增加,靠近起始端测温点的温度逐渐升高,而远离起始端各测温点的温度升温则非常缓慢,当焊接速度达到较高的稳定焊接速度,搅拌头接近后续各测温点时,其温度值瞬间急剧升高,然后随着搅拌头的远离,温度值逐渐下降.不同区域测温点温度测试结果显示,靠近下轴肩试板测温点的温度高于靠近上轴肩试板、后退侧的温度明显高于前进侧;与单轴肩搅拌摩擦焊接试板相同,距离焊缝越近的位置温度上升和下降的越剧烈,峰值温度越高;焊接速度提高,各测温点的峰值温度依次降低,随着测温点远离焊缝中心,焊接速度对其温度分布的影响作用逐渐减弱.
参考文献
| [1] | 冯涛,郁振其,韩洋,张永昂,王引真.SiCp/2024Al铝基复合材料搅拌摩擦焊接头微观组织[J].航空材料学报,2013(04):27-31. |
| [2] | 刘会杰,赵运强,侯军才.自持式搅拌摩擦焊研究[J].焊接,2010(11):7-10,14. |
| [3] | 刘会杰;赵运强;侯军才 等.上、下轴肩直径不等的自持式搅拌摩擦焊方法及其搅拌头[P].CN 101947691A,2011-01-19. |
| [4] | SKINNER M;EDWARDS R L;ADAMS G.Improvements to the FSW process using the self-reacting technology[A].Park City,Utah,USA,2003:S6B-SP2. |
| [5] | THOMAS W M;WIESNER C S .Conventional and bobbin friction stir welding of 12% chromium alloy steel using composite refractory tool materials[J].SCIENCE AND TECHNOLOGY OF WELDING AND JOINING,2009,14(03):247-253. |
| [6] | 董春林,董继红,赵华夏,栾国红,付瑞东.6082铝合金双轴肩FSW接头组织及腐蚀性能[J].焊接学报,2012(10):5-9. |
| [7] | 赵衍华,李延民,郝云飞,陈玉耘,王国庆.2219铝合金双轴肩搅拌摩擦焊接头组织与性能分析[J].宇航材料工艺,2012(06):70-75,91. |
| [8] | P L Threadgill;M M Z Ahmed;J P Martin .The use of bobbin tools for friction stir welding of aluminium alloys[J].Materials Science Forum,2010(Pt.2):1179-1184. |
| [9] | 张健,李光,李从卿,栾国红.2219-T4铝合金双轴肩FSW与常规FSW接头性能对比研究[J].焊接,2008(11):50-52. |
| [10] | THOMAS W M;WIENSNER C S.Recent developments of FSW technologies evaluation of root defects,composite refractory tools for steel join and one-pass welding of thick sections using self-reacting bobbin tools[A].Pine Mountain,GA,United States,2008:25-34. |
| [11] | MARIE F D;ALLEHAUX D;ESMILLER B.Development of the bobbin tool technique on various alnminnm alloys[A].Metz,France,2004:S01-SP1. |
| [12] | J. Hilgert;H. N. B. Schmidt;J. F. dos Santos;N. Huber .Thermal models for bobbin tool friction stir welding[J].Journal of Materials Processing Technology,2011(2):197-204. |
| [13] | 刘雪梅;姚君山;蔡跃 等.双轴肩搅拌摩擦焊温度场数值模拟研究[OL].http://www.paper.edu.cn/index.php/default/ releasepaper/content/201101-772 |
| [14] | SATO T;SUDA T.Finite element analysis of friction stir welding affected by heat conduction through welding jig[A].IOS Press,2010:139-146. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%