【摘要】：對低合金超高強(qiáng)度鋼(D406A)進(jìn)行了光纖激光-電弧復(fù)合焊接,在最佳工藝參數(shù)條件下,研究了裝配間隙對D406A焊接性能的影響.結(jié)果表明,裝配間隙的最佳范圍為0.6~1.0 mm.另外在最佳工藝條件下,對焊縫形狀、焊接接頭組織、硬度及力學(xué)性能進(jìn)行了研究.結(jié)果表明,焊縫金屬可以分為電弧區(qū)、激光-電弧復(fù)合區(qū)及激光區(qū),并且激光區(qū)與電弧區(qū)相比組織細(xì)小;3個區(qū)域的硬度分布最高值均出現(xiàn)在熱影響區(qū)(HAZ);經(jīng)熱處理后,焊接接頭力學(xué)性能基本與母材相同.
[Abstract]:Optical fiber laser-arc composite welding of low alloy ultra-high strength steel (D406A) was carried out. the effect of assembly gap on the welding performance of D406A was studied under the optimum process parameters. The results show that the optimum range of assembly clearance is 0.6 鈮，

本文編號：2522030