摘要
在焊缝中埋入热电偶,检测了厚板铝合金搅拌摩擦焊缝不同特征点的温度变化曲线,获得了厚板铝合金搅拌摩擦焊温度分布的规律。检测结果表明:旋转速度ω和焊接速度v的比值(ω/v)越大,特征点峰值温度越高,同一位置前进侧的特征点峰值温度高于后退侧15℃左右。焊缝厚度方向温度曲线在升温过程中,65 s前曲线的斜率基本相同,65 s后上表面的曲线斜率最大。在降温过程中,上表面的降温快于下表面,130 s后上表面温度低于下表面。
By means of embedding thermocouple in the welding seam, the temperature of thick aluminum plate is measured. The varying temperature curves in the welding thick plates are obtained, and the approximate law of temperature field distribution is determined. The measured results indicates that the greater the ratio of rotary speed to the speed of welding travel （ω/v） is, the higher the temperature of characteristic point is. The peak temperature in the advancing side is 15℃ higher than that in the retreating side. During temperature increasing, the slope of the temperature curve along the thickness direction before 65 s is similar, while after 65 s, the slope of the upside temperature curve is the highest. Temperature of the upside decreases more quickly than that of the bottom and after 130 s, the temperature of the up-surface is lower than that of the down-surface.
出处
《机械科学与技术》
CSCD
北大核心
2008年第9期1159-1162,共4页
Mechanical Science and Technology for Aerospace Engineering
关键词
搅拌摩擦焊
温度检测
热电偶
friction stir welding（FSW）
temperature measuring
thermocouple
