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随着国家能源战略政策的调整,风力发电作为清洁能源和可再生能源越来越受到国家的重视,风力发电设备制造业蓬勃发展。为了占领风电设备制造市场,我国先后自主开发并制造了1.5MW、2.0MW、3.2MW及5MW等机型的风力发电机产品。其中大部分机型运行于我国北方严寒地区,电机运行工况复杂,焊接结构件作为电机的“腰身”承受低温、疲劳载荷及冲击载荷等苛刻的工作条件,因此必须通过严格规范的焊接工艺过程来保证焊接质量;同时为了提高结构件的生产效率,满足批量化生产的需求,迫切需要一种适应于超出常规焊接热输入的焊接材料,按照ASME第Ⅸ卷进行焊接工艺评定,制定合理的焊接参数,保证焊接接头-40℃冲击韧性和力学性能不低于母材要求。
With the adjustment of national energy strategy and policy, wind power as a clean energy and renewable energy more and more by the country’s attention, wind power equipment manufacturing industry to flourish. In order to occupy the wind power equipment manufacturing market, China has independently developed and manufactured 1.5MW, 2.0MW, 3.2MW and 5MW models of wind turbine products. Most of the models are running in cold regions of northern China. The motor runs in complicated working conditions. As the “waist” of the motor, the welded structural parts are subject to harsh working conditions such as low temperature, fatigue load and impact load. Therefore, it is necessary to pass strict standard welding Process to ensure the quality of welding; the same time, in order to improve the production efficiency of the structure to meet the needs of mass production, an urgent need for a welding material beyond the conventional heat input welding, in accordance with the Ⅸ ASME welding technology assessment, to develop a reasonable Of the welding parameters, to ensure that the weld joint -40 ℃ impact toughness and mechanical properties of not less than the base metal requirements.