| 预拉伸控制铝合金焊接变形 |
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| 引用本文： | 章明明,李敬勇.预拉伸控制铝合金焊接变形[J].材料开发与应用,2005,20(1):36-38. |
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| 作者姓名： | 章明明 李敬勇 |
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| 作者单位： | 江苏科技大学材料科学与工程学院,江苏,镇江,212003;江苏科技大学材料科学与工程学院,江苏,镇江,212003 |
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| 摘 要： | 在预拉伸应力作用下,焊接了厚度为4mm的5A05铝合金试板,通过焊接试板挠曲变形量的测定,探讨了预加拉应力对铝合金焊接变形的影响。试验结果表明,预拉伸焊接法可以有效减小铝合金薄板焊缝处的纵向挠曲变形量,在弹性应力范围内,随着预拉伸应力的增大,试板的焊接变形逐渐变小。初步分析认为,预拉伸应力扩大了高温下焊缝附近的塑性变形区,从而增强了冷却过程中该区域抗塑性拉应变的能力,减小了焊件的挠曲变形。
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| 关 键 词： | 预拉伸焊接法 焊接变形 铝合金 |
| 文章编号： | 1003-1545(2005)01-0036-03 |
| 修稿时间： | 2004年8月31日 |
Control of Welding Distortion of Al Alloy Sheet through Pre-tension |
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| ZHANG Ming-ming,LI Jing-yong.Control of Welding Distortion of Al Alloy Sheet through Pre-tension[J].Development and Application of Materials,2005,20(1):36-38. |
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| Authors: | ZHANG Ming-ming LI Jing-yong |
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| Abstract: | The 5A05 aluminum sheet with a thickness of 4mm were welded under pre-tension stresses. Based on the measurement of the longitudinal warp distortion of weldments, the influence of pre-tension on the welding distortion of aluminum alloy was investigated. The experimental results showed that welding under pre-tension stresses could reduce the longitudinal warp distortion near to the welds of thin aluminum alloy plates effectively,and the greater the pre-tension stresses at the range of elasticity, the smaller longitudinal warp distortion. It was considered that pre-tension stresses enlarged the plastic distortion region, strengthened the resistance to plastic tensile distortion, and consequently decreased the longitudinal warp distortion of weldments. |
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| Keywords: | Pre-tension welding Welding distortion Aluminum alloy |
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