gh312806cr19ni10异种材料激光焊接特性研究-study on laser welding characteristics of gh 312806 cr 19 ni 10 dissimilar materials.docx
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gh312806cr19ni10异种材料激光焊接特性研究-study on laser welding characteristics of gh 312806 cr 19 ni 10 dissimilar materials
process,thestressoftheHAZofGH3128nexttothejointfacewasverylarge,andthe stressgotlargerwiththeprogressofthecooling process.Afterthefinishingoftheweld process,theresiduestressoftheedgeofthejointfacewasverylager too.What’smore, themultipleweldstructurewasalsoanalyzedbyfiniteelementmethod,bycomparison theresiduestressanddeformationofdifferentweldingsequence,theregulationthat weldingsequencehad noeffect to thedeformation and residue stress was found.Keywords:laserwelding, T-joint, super alloy, numerical simulation目录摘要.......................................................................................................................IAbstract.....................................................................................................................II第1 章绪论............................................................................................................11.1课题背景及意义...........................................................................................11.2课题相关研究现状.......................................................................................21.2.1 高温合金焊接国内外研究现状............................................................22.1引言...............................................................................................................82.2试验材料与焊接方法...................................................................................82.2.1试验材料与设备....................................................................................82.2.2焊接方式..............................................................................................102.3焊接工艺实验.............................................................................................102.3.1 焊缝形貌及微观组织..........................................................................102.3.2 连续焊和脉冲焊对比..........................................................................112.3.3 线能量对焊缝形貌的影响..................................................................132.3.4 连续焊焊缝成形规律.................................
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