The temperature fields in laser ＋ GMAW-P hybrid welding for different laser-wire distances in quasi-steady state were calculated using an developed combined heat source model, and the influence of laser-wire distance...The temperature fields in laser ＋ GMAW-P hybrid welding for different laser-wire distances in quasi-steady state were calculated using an developed combined heat source model, and the influence of laser-wire distance on them was analyzed. The results show tbat, at a low level of arc power, the temperature profiles caused by laser and arc energy respecively cannot couple well when the laser-wire distance reaches 4 mm, a trend of separation between them beginning to take place. In the case of high arc power, both the critical laser-wire distance and HAZ width increase.展开更多
In laser ＋ P-GMA hybrid welding, laser-wire distance is an important parameter to describe the distance from laser spot to the center of the pulsed gas metal arc. The experiments results show that the optimal laser-w...In laser ＋ P-GMA hybrid welding, laser-wire distance is an important parameter to describe the distance from laser spot to the center of the pulsed gas metal arc. The experiments results show that the optimal laser-wire distance with the deepest weld penetration increases with welding current and laser power being increased and decreases with welding speed being increased. Welding current, laser power and welding speed determine the hybrid welding heat input in laser ＋ arc hybrid welding process, so there is a correlation between the optimal laser-wire distanee and the hybrid heat input welding parameters for the deepest weld penetration： the optimal laser-wire distance increases with the heat input being increased. The positive correlation between the optimal laser-wire distance and the hybrid welding heat input is induced by the characteristics of the limited influence of P-GMA welding process on laser transmission and the dependence of weld penetration of hybrid welding on laser power.展开更多
探讨了一种固态储氢装置的制造技术,且主要对罐体中异构材料焊接难点进行分析。首先,研究了不同参数下激光填丝焊接S30408异构材料(网状、块状)的焊接接头结构、形貌及力学性能差异,随后选取最优焊接参数焊接罐体内部,最后对单罐、整罐...探讨了一种固态储氢装置的制造技术,且主要对罐体中异构材料焊接难点进行分析。首先,研究了不同参数下激光填丝焊接S30408异构材料(网状、块状)的焊接接头结构、形貌及力学性能差异,随后选取最优焊接参数焊接罐体内部,最后对单罐、整罐及水箱进行气密性和无损检测试验。结果表明,在激光功率为450 W和焊接速度35 mm min下,获得了无缺陷的异构材料焊接接头。与其他参数相比,焊接速度为35 mm min时,获得了无缺陷的焊接接头且拉伸强度与断后伸长率达到了最高,分别为165.3 MPa和5.51%。单个与整体罐体的气密性与整体无损检测达到设计标准。展开更多
文摘The temperature fields in laser ＋ GMAW-P hybrid welding for different laser-wire distances in quasi-steady state were calculated using an developed combined heat source model, and the influence of laser-wire distance on them was analyzed. The results show tbat, at a low level of arc power, the temperature profiles caused by laser and arc energy respecively cannot couple well when the laser-wire distance reaches 4 mm, a trend of separation between them beginning to take place. In the case of high arc power, both the critical laser-wire distance and HAZ width increase.
基金Supported by the key project of Natural Science Foundation of Heilongjiang Province （ZJG0601 and the National Key Technologies Research and Development Program of China during the 11^th Five-Year Plan Period （2006BAFO4B10）.
文摘In laser ＋ P-GMA hybrid welding, laser-wire distance is an important parameter to describe the distance from laser spot to the center of the pulsed gas metal arc. The experiments results show that the optimal laser-wire distance with the deepest weld penetration increases with welding current and laser power being increased and decreases with welding speed being increased. Welding current, laser power and welding speed determine the hybrid welding heat input in laser ＋ arc hybrid welding process, so there is a correlation between the optimal laser-wire distanee and the hybrid heat input welding parameters for the deepest weld penetration： the optimal laser-wire distance increases with the heat input being increased. The positive correlation between the optimal laser-wire distance and the hybrid welding heat input is induced by the characteristics of the limited influence of P-GMA welding process on laser transmission and the dependence of weld penetration of hybrid welding on laser power.
文摘探讨了一种固态储氢装置的制造技术,且主要对罐体中异构材料焊接难点进行分析。首先,研究了不同参数下激光填丝焊接S30408异构材料(网状、块状)的焊接接头结构、形貌及力学性能差异,随后选取最优焊接参数焊接罐体内部,最后对单罐、整罐及水箱进行气密性和无损检测试验。结果表明,在激光功率为450 W和焊接速度35 mm min下,获得了无缺陷的异构材料焊接接头。与其他参数相比,焊接速度为35 mm min时,获得了无缺陷的焊接接头且拉伸强度与断后伸长率达到了最高,分别为165.3 MPa和5.51%。单个与整体罐体的气密性与整体无损检测达到设计标准。
