摘要
法兰是风力发电机组塔架连接中的关键部件,其力学性能和加工精度要求均较高。通常是采用钢坯整体锻造的制作工艺,在数控机床上进行连接面和安装孔的加工。因法兰的外形尺寸较大,这种方法存在制作周期长、材料利用率低、锻造和加工成本高等缺点。在对风力发电机组塔架的原材料力学性能、法兰连接的使用工况和承载力综合分析的基础上,提出了拼焊法兰的制作方法,对拼焊法兰的焊接过程、热处理工艺、焊缝和热影响区的力学性能和金相组织进行了分析。结果表明:采用合理的焊接工艺及焊后热处理工艺,拼焊法兰焊接接头的各项力学性能均能达到母材的标准要求,为法兰制造提供了一种新的方法,解决了法兰供货周期长、成本高等问题。
Flanges are the critical components in the connection between the tower sections, so the strict requirements of the mechanical properties and machining accuracy are needed. They were usually made from the steel ingots by forging which the interface and holes were finished by numeric machines. Due to the large dimensions, there were many disadvantages such as longer manufacturing time, poor utilization, high cost on machining and forging. A new method has been put forward on flange manufacturing on basis of analysis of the mechanical properties for raw materials, the applications condition for flange connection and the load case, and the welding procedure, heat treatment technology, and the mechanical properties and metallographic property for the weld and heat affected zone were investigated. The results indicate that the welding flange will be close to the properties of raw material if the rational processes of welding and heat treatment of post-welding have been used, so a new method for manufacturing flange has been put forward which will solve the problem of long delivery time and a high manufacturing cost for the flange.
出处
《焊接》
北大核心
2007年第9期46-48,共3页
Welding & Joining
关键词
拼焊法兰
热处理
焊接接头
力学性能
flange splicing, heat treatment, welding joint, property
