摘要
随着海上石油开发逐步走向深海,海洋平台的建设和深水铺管作业对起重设备的性能要求越来越高。双八千起重机安装在深水半潜式铺管起重铺管船上,具有起重量大、工作幅度大等特点。臂架是整机的重要承载构件,须满足足够的强度、刚度和稳定性要求。因此,选用合适的钢材,开发合适的焊接工艺至关重要。针对这些特点,双8000 t大型起重机臂架的材料采用屈服极限为690 MPa的高强度钢,并对其进行了焊接工艺开发。通过显微硬度分析、拉伸、弯曲、冲击试验,评定焊接接头的性能。结果表明,在对加筋桁架和箱型组合结构的起重机臂架采用Q690D高强度钢焊接工艺的研究中,攻克了高强钢的焊接工艺技术,控制了起重臂的自重变形和焊接变形,保证了整机的制造质量。
With the offshore oil field development gradually stepping to deepwater, high performance requirements for lifting equipment of offshore platform construction and deepwater pipelaying operations is becoming increasingly important. Double eight thousand tons crane installed on the deepwater semi-submersible pipelaying ＆ lifting vessel has the characteristics of large lifting capacity and wide working range. As an important component of the crane, boom must meet the needs of sufficient strength, stiffness and stability. Therefore, the appropriate steel choosing and welding process development is essential. According to mentioned characteristics, the double 8000 tons large-scale crane boom uses a kind of high strength steel with a yield limit of 690 MPa and a new welding process. To assess the performance of welded joints, tests of microhardness analysis, tensile, bending and impact are performed. The results show that by using Q690D high strength steel welding process, the reinforced truss and box combination structure of the crane boom has successfully solved the problem of high strength steel welding process, effectively controlled the arm deformation due to self-weight and welding deformation, and ensured the manufacturing quality of the crane.
出处
《中国造船》
EI
CSCD
北大核心
2012年第A02期389-396,共8页
Shipbuilding of China
关键词
高强钢
焊接工艺
力学性能
high-strength steel
welding process
mechanical properties
