TA2中厚板低功率激光诱导双电弧高效焊接及机理

打开文本图片集

中图分类号：TG456

Abstract： The high-effciency welding 6 mm TA2 pure titanium plate was realized by using low power pulsed laserinduced twin TIG hybrid welding heat source（LITTW）.Based on the dynamic behavior Ti particles， the effect laser pulseon arc plasma was studied.The results show thatthe arc energy LITTW is more concentrated than that laser induced single TIG welding （LISTW）．The welding energy consumption is only （204 50.9% that LISTW，but the welding speed is 2.3 times that LISTW. After the laser pulse action， there is a recovery time for the arc plasma to recover from the energy concentration state to the original arc shape. Under the experimental conditions，the recovery time LITTWis 6.5ms ，which is 3ms longer than that LISTW.The stable keyhole morphology in LITTW provides conditions forthe continuous transfer Ti particles to arc plasma and prolongs the recovery time plasma.

Key words： laser induced twin arc welding；pure titanium thick plate；welding energy consumption; arc plasma ；keyhole

0前言

比强度，良好的塑韧性、低密度、优良的抗腐蚀性能，且由于这种材料生产工序少、周期短，具有较高的成材率和较低的制造成本，成为石油化工、发电、海水淡化等

TA2纯钛作为工业中应用最广泛的合金，具有高领域大型装备的理想材料[1-2] 。（剩余7714字）