| 引用本文: | 赵志毅,章小芳,赵海涛,薛润东.热处理工艺对GH909板材TIG焊缝析出相的影响[J].材料科学与工艺,2011,19(3):102-105,112.DOI:10.11951/j.issn.1005-0299.20110320. |
| ZHAO Zhi-yi,ZHANG Xiao-fang,ZHAO Hai-tao,XUE Run-dong.Effects on precipitates of GH909 plate TIG weld under different heat treatments[J].Materials Science and Technology,2011,19(3):102-105,112.DOI:10.11951/j.issn.1005-0299.20110320. |
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| 摘要: |
| 为改善GH909板材的焊接工艺及使用性能,采用扫描电镜和EDX分析研究了GH909板材在TIG焊后不同热处理工艺焊缝析出相的变化规律,对提高GH909板材TIG焊接接头质量具有重要的应用价值.研究结果表明:焊缝形成的相有针片状ε/ε″相、γ/Laves低熔点共晶相,且都在γ晶间分布;焊缝中心低熔点共晶相所占比例均比离焊缝中心不远的焊缝边部小,经过固溶处理的焊缝低熔点共晶相所占比例加大;ε/ε″相大部分溶解,且Nb、Ti偏析较严重,焊缝结晶裂纹敏感性高,影响合金的综合性能. |
| 关键词: GH909 焊缝 低熔点共晶相 析出 |
| DOI：10.11951/j.issn.1005-0299.20110320 |
| 分类号:TG441.8 |
| 基金项目: |
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| Effects on precipitates of GH909 plate TIG weld under different heat treatments |
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ZHAO Zhi-yi1, ZHANG Xiao-fang2, ZHAO Hai-tao3, XUE Run-dong1
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1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Sinosteel Engineering Design Institute Co.,Ltd.,Shijiazhuang 050021,China;3.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China
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| Abstract: |
| To improve the welding process and the performances of GH909,a study on precipitates of GH909 plate TIG weld under different heat treatments had been carried out by SEM and EDX.The study had found ε/ε" platelets,γ/Laves low-melting eutectic phases distribute in the weld of austenite intergranular.The ratios of low-melting eutectic phases in weld center were smaller than weld edge which was near the weld center.After solution treatment,the proportions of low-melting eutectic phases were increased,most of ε/ε" were dissolved,and the segregation of Nb and Si were more serious.This could lead to higher weld solidification cracking sensitivity and affect the comprehensive properties of GH909. |
| Key words: GH909 weld low-melting eutectic phase precipitation |
