搅拌摩擦焊接过程的试验测量及分析
Measurement and analysis of friction stir welding process
-
摘要: 通过设计一系列搅拌摩擦焊接试验,详细测量和分析焊接温度场分布、搅拌头机械载荷、残余应力和残余变形.试验发现,搅拌摩擦焊的温度测量结果的准确性取决于采样频率和热电偶的定位方法;搅拌头的机械载荷主要表现为下压力和扭矩,它们在准稳态焊接的条件下会保持稳定,但取值随焊接参数的变化而发生相应变化;焊接残余应力的主要成分是纵向应力,焊缝区域内呈现较高水平的拉应力,分布呈不对称的双峰特征;薄板的焊接变形具有马鞍形和反马鞍形两种形态,且变形程度受到薄板尺寸、旋转频率和焊接速度的影响.Abstract: A series of friction stir welding (FSW) experiments were designed to measure and investigate the welding temperature field, mechanical loads of stir tool, residual stress and residual distortion. The measurements show that the accuracy of temperature data will be influenced by sampling frequency and the method of thermocouple set-up. The mechanical loads of stir tool mainly appear as down force and torque, which keep as constant during the period of quasi-steady welding, but their values depend on welding parameters. The main residual stress of FSW joint displays as longitudinal tensile stress, which distributes in welding zone and has a character of asymmetric double hump. The residual distortion of sheet after FSW has two opposite pattern of saddle state and anti-saddle state, and the distortion magnitude influenced by sheet dimension, rotation speed and welding speed.
-
Keywords:
- friction stir welding /
- temperature field /
- mechanical loads /
- residual stress /
- residual distortion
-
-
期刊类型引用(6)
1. 曹志龙，朱浩，安同邦，王晨霁，马成勇，彭云. 1 000 MPa级高强钢熔敷金属强韧化机理分析. 焊接学报. 2023(07): 116-122+135-136 . 
本站查看
2. 张岩. 高强钢在轻量化结构设计中的应用及其焊接. 电焊机. 2021(12): 34-40+128 . 百度学术
3. 栗卓新，苏小虎，李红，KIM Hee Jin. 690 MPa级以上高强钢焊接熔敷金属微观组织及其联合贝氏体的研究进展. 中国材料进展. 2019(12): 1169-1176 . 百度学术
4. 隋轶，韩严法，傅博，胡奉雅，刘芳芳，蒋健博. 应用示波冲击法研究Q960钢焊接热模拟冲击韧性. 宽厚板. 2018(03): 1-4 . 百度学术
5. 康丹丹，万天明，王高见，郑永强. 水电用1000 MPa级超高强钢焊接的研究进展. 热加工工艺. 2018(15): 11-13+17 . 百度学术
6. 武丹，刘政军，苏允海，裘荣鹏. 夹杂物对高强钢焊缝金属组织和冷裂纹影响分析. 热加工工艺. 2018(23): 246-249 . 百度学术
其他类型引用(1)
计量
- 文章访问数: 259
- HTML全文浏览量: 10
- PDF下载量: 71
- 被引次数: 7
下载:
