本文選題：TC鈦合金 + 激光填絲焊��； 參考：《熱加工工藝》2016年19期

【摘要】：針對鈦合金激光自熔焊對毛坯和裝夾精度要求高,焊接后表面存在凹陷、咬邊、不飽滿等問題,對1 mm厚TC4鈦合金進行激光填絲焊試驗,研究了焊絲送入條件、離焦量和送絲速度對焊縫成形質(zhì)量的影響,并優(yōu)選工藝參數(shù),分析了焊接接頭的顯微組織、硬度和拉伸強度。結(jié)果表明:在工藝參數(shù)為離焦量+2 mm、激光功率800 W、焊接速度20mm/s、送絲速度25 mm/s、送絲角度50°、絲光間距0 mm時進行激光填絲焊,焊縫表面未出現(xiàn)凹陷、不飽滿等缺陷,且焊縫微觀組織致密。焊接接頭的平均抗拉強度為1287 MPa,大約是基材的1.32倍,比激光自熔焊提高了20.96%左右。
[Abstract]:Aiming at the problems of laser self-melting welding of titanium alloy which requires high precision of blank and clamping, the surface of titanium alloy after welding is sunken, trimmed and not full, the welding test of 1 mm thick TC4 titanium alloy is carried out, and the feeding conditions of welding wire are studied. The effects of defocus and wire feeding speed on the quality of weld formation were investigated. The microstructure, hardness and tensile strength of the welded joints were analyzed by selecting the process parameters. The results show that when the process parameters are defocus 2 mm, laser power 800 W, welding speed 20 mm / s, wire feeding speed 25 mm / s, wire feeding angle 50 擄, wire distance 0 mm, the weld surface is not sunken and full. The microstructure of the weld is compact. The average tensile strength of the welded joint is 1287 MPA, about 1.32 times of that of the substrate, which is 20.96% higher than that of laser self-fusion welding.
【作者單位】： 江蘇大學(xué)機械工程學(xué)院;上海普睿瑪智能科技有限公司;溫州大學(xué)機電工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51175237,51305050) “高檔數(shù)控機床與基礎(chǔ)制造裝備”科技重大專項(2013ZX04009031-4) 科技部中俄雙邊政府間2014-2015科技合作項目(CR17-11) 浙江省國際科技合作專項(2013C14007) 溫州市工業(yè)科技研究開發(fā)項目(J20130033) 江蘇省“六大人才高峰”A類項目(1721111091)
【分類號】：TG456.7

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