新聞資訊
TA15鈦合金薄壁焊接件熱處理校形研究
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-12-18
針對飛機關鍵薄壁件焊接過程中產生的“簸箕”變形問題，采用有限元結合實驗驗證的方法進行了焊接變形及焊后熱處理校形的研究。通過實驗獲得了材料的基礎物性及高溫蠕變行為，驗證了焊接及焊后熱處理有限元模型。利用可靠的熱處理有限元模型進行了熱處理工藝優化。
TA15鈦合金薄壁焊接件熱處理校形研究STUDY ON SHAPE CORRECTION OF THE THIN PLATE OF?TA15 TITANIUM ALLOY BY POST WELD HEAT TREATMENT
針對飛機關鍵薄壁件焊接過程中產生的“簸箕”變形問題，采用有限元結合實驗驗證的方法進行了焊接變形及焊后熱處理校形的研究。通過實驗獲得了材料的基礎物性及高溫蠕變行為，驗證了焊接及焊后熱處理有限元模型。利用可靠的熱處理有限元模型進行了熱處理工藝優化。結果表明，筋條焊后開槽導致沿筋條方向的應力釋放及筋條-長衍焊點是導致“簸箕”變形的主要原因；提高溫度、增加載荷及延長保溫時間能夠改善熱處理校形的效果，并據此制定了面向工程應用的TA15 鈦合金薄壁構件的熱處理工藝圖。?
Weld deformation of the thin-wall weldment used in fighter aircraft not only hinders?its subsequent procedure of fabrication and assembling, but also reduces its fatigue strength. As a?result, weld deformation shortens its service lifeessentially. Dustpan deformation is always?produced in the thin-wall weldment after multiple-pass weld. In this paper, combining with the?experiment, the finite element method was adopted to analysis the deformationof the thin-wall?weldment by multiple-pass weld and its shape correction by post weld heat treatment. For?obtaining the fundamental properties such as thermal parameters and mechanical parameters of?TA15 titanium alloy, a series of experiments were conducted at room temperature and high?temperatures. Additionally, creep behaviors of TA15 titanium alloy were studied at the?temperatures of 500℃, 550℃, 600℃, 650℃, 700℃ and 750℃, and the parameters of creep?constitutive equations of the alloy were obtained with considering the analysis of post weld heat?treatment. A thermal coupled temperature – displacement analysis for welding and post weld heat?treatment was performed on a three dimentional shell model of protective gille. Experiments of?multiple-pass weld and post weld heat treatment were used to testify the reliability of the finite?element model of welding and post weld heat treatment. With using the reliable finite element ?model, the parameters of heat treatment were studied. The study indicates that: the fabrication on?the crossing of structure section and fillet after fillet - wallboard weld leads the compression?deformation release along the fillet, after that, the shrinkage distortion produced during spot?welding of fillet - structural section mainly contributes the large dustpan deformation of the?thin-wall weldment; increasing temperatures, enlarging loads and prolonging the hold time can?improve the shape correction of the thin-wall weldment during post weld heat treatment, hence we?worked out the guide maps of the post weld heat treatment for shape correction of the thin-wall?weldment under 700℃ and 750℃.?
作為值得信賴的合作伙伴和高品質金屬合金的半成品供應商，艾荔艾擁有完善的服務體系和專業的團隊。在同客戶交易的過程中，我們力求根據不同的應用需求將我們的產品做到精益求精。針對當前和未來的市場需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。
AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
獲取更多我們供應的合金和服務信息，請致電086-021-67660801或發電子郵件kefu@ailiaigroup.com聯系我們，您也可以通過微博和微信和我們互動。
For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on?Weibo?and?Weixin.