摘要
与以往1.5 MW风电塔筒相比,3.0 MW风电塔架具有直径大、管壁厚等特点,所以在焊接过程中与以往的工艺有所不同,需要进行焊前预热、焊后消除应力处理,以改善其组织性能,来保证风电塔筒的焊接质量。重点介绍了大庆和平牧场3.0 MW风电塔筒的焊接工艺和热处理工艺;严格控制焊接顺序及影响焊接质量的层间温度、层间清理、清根质量、焊剂烘焙、工艺参数等各个环节;很好地解决了厚壁大直径风电塔筒焊接遇到的困难,达到了风电塔筒的焊接质量控制要求,从而保证风电塔筒的整体质量要求,保证风电机组正常、安全运行。
Wind-tower framework of 3.0-megawatt has a characteristic with large in diameter,wall thickness etc,compared with previous wind-tower framework of 1.5-megawatt.so the welding process is different from previous ones,you will get it preheated before welding and to eliminate stress after welding,it can improve their microstrocture performance to ensure the quality of the framework.This paper introduces the proper welding process and heat treatment process adopted＂ by the wind-tower of 3.0-megawatt of Daqing peace pasture in process of welding,there is a strict control in welding sequence and welding quality which is affected by temperature between layers,layer cleaning,root cleaning,flux baking,process parameters and other aspects,it properly solves the problems encountered in dealing with the wind-towers with lager diameter and wall thickness, so it meets the requirements of quality control, thus ensure all quality requirements of wind- tower as well as a normal and safe operation of generator groups.
出处
《电焊机》
北大核心
2012年第8期17-19,共3页
Electric Welding Machine
关键词
风塔
外翻
焊后热处理
wind-tower
extrorse flange
PWHT（postwelding heat treatment）
