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激光焊在船舶中的应用研究 激光焊接在造船行业中的应用案例
 

激光焊接在船舶上的应用:在船体建造中,焊接时间约占船体总建造时间的30%~40%,焊接成本约占船体总造价的30%~50%。提高造船效率,降低造船成本,提高船舶建造质量,是造船企业永恒的追求。高效焊接技术对造船企业具有重要意义。此外,船东和船舶检验对船舶,特别是豪华游轮的质量要求,也为激光焊接在船舶上的应用提供了市场。


激光焊接在造船业中的应用实例:在欧洲,激光焊接技术已广泛应用于船舶工程、船舶配套等领域。阀门的密封环(合金复合材料,2 ~ 2.5m)海洋工程装备焊接。传统的焊接时间12h。如果CO2激光焊接应用于真空,7min可以完成。效果明显,无热变形。潜艇高强度钢的激光切割与焊接。传统的焊接方法,热输入量大,热影响区宽,需要多层坡口焊,采用激光填丝焊。焊缝小,热影响区窄,焊接变形易于控制。


从俄罗斯到德国的油气管道,用厚度为15mm,采用激光焊接的内部焊接完成。直径?2 ~ 2.5m,材料是12%铬合金高功率燃气轮机叶轮、西门子和西屋均由激光焊接完成。低速机活塞零件需要4000 ~ 5000h一般术后修复,采用激光焊接修复铬涂层,涂层厚度为2mm,其使用寿命可延长3倍到2 ~。螺旋桨空泡修理。当螺旋桨长期暴露在空气和水中时,螺旋桨的端部和侧面容易产生空泡,影响推进效率。用激光焊接修复空泡的位置。与常规焊接相比,抗气蚀能力大大提高。



The application of laser welding in ships: in hull construction, welding time accounts for about 30%~40% of the total hull construction time, and the cost of welding is about 30%~50% of the total cost of hull construction. Improving shipbuilding efficiency, reducing shipbuilding costs and improving ship building quality is the eternal pursuit of shipbuilding enterprises. Efficient welding technology is of great significance for shipbuilding enterprises. In addition, the requirements of ship owner and ship inspection on the quality of the ship, especially the luxury cruise ship, also provide a market for the application of laser welding in the ship.


Application case of laser welding in shipbuilding industry: in Europe, laser welding technology has been widely applied in marine engineering, ship matching and other fields. The valve seal ring (alloy composite material, 2~2.5m) of marine engineering equipment is welded. The conventional welding time needs 12h. If CO2 laser welding is applied in vacuum, 7min can be completed. The effect is obvious, and there is no thermal deformation. Laser cutting and welding of high strength steel on submarines. The conventional welding method, with large heat input and wide heat affected zone, needs multi layer wire filler welding with open groove, while laser filling wire welding is applied. The weld bead is small, the heat affected zone is narrow, and the welding deformation is easy to control.


The oil and gas pipeline from Russia to Germany, with a thickness of 15mm, is completed by laser welding internal welding. Diameter? 2~2.5m, material is 12% chromium alloy high power gas turbine impeller, SIEMENS and Westinghouse are all completed by laser welding. The piston parts of low speed machine need to be repaired after the general operation of 4000~5000h, using laser welding repair, the coating thickness of chrome coating is 2mm, and the service life can be extended by 2~3 times. Repair of propeller cavitation. When the ship propeller is exposed to air and water for a long time, the end and side of the propeller are easy to produce vacuoles, which will affect the efficiency of propulsion. Laser welding is used to repair the position of vacuoles. Compared with conventional welding, the anti cavitation ability is greatly improved.




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