摘要
试验中低相变点焊缝金属的固态相变温度在190℃左右,由于焊缝金属相变体积膨胀使其焊接接头的焊接残余变形降低。利用低相变点焊条LTTE和普通焊条E5015通过V形坡口对接接头和半V形坡口T形接头的角变形以及平板堆焊试验,探讨了焊缝金属固态相变对焊接变形的影响。两种接头角变形试验结果表明,LTTE焊条试件具有较小的角变形,其角变形分别为E5015焊条试件角变形的69.1％和64.3％;LTTE焊条平板堆焊试件出现反变形,在该试验条件下反变形挠度为-1.9mm,而E5015焊条试件的正变形挠度为2 mm。这些试验结果为减小和控制焊接残余变形提供了一条有效的方法。
The transformation starting temperature of the weld metal with low transformation temperature is about 190°C. Welding residual distortion of welded joints could be decreased by means of the volume expansion of solid-state phase change. A low transformation temperature electrode (LTTE) and conventional E5015 were used in the angle distortion test of both butt joints and T-joints as well as the build-up welding test on plate. The effects of solid-state phase change on welding distortion were discussed. The test results of the angle distortion test of both butt joints and T-joints show that specimen welded with the LTTE had smaller distortion than those welded with the E5015; the former values were respectively 69.1% and 64.3% compared with later ones. The test results of buildup welding on plate show that the specimen welded with LTTE had negative bending distortion, under this test condition its negative deflection is -1.9 mm, on contrary the specimen welded with E5015 had 2.0 mm positive deflection in bending distortion. The test results provide a valuable method to decrease or to control welding residual distortion.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2003年第5期5-9,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金(50175079)
中国博士后科学基金(2003033348)
