SA335 P91焊接裂纹原因分析及对策  

Analysis and Solution on SA335 P91 Welding Cracks

作　　者：陈泽盘 陈尚书 Chen Zepan;Chen Shangshu(Sichuan Chuanguo Boiler Co., Ltd., Chengdu 610400)

机构地区：[1]四川川锅锅炉有限责任公司,成都610400

出　　处：《中国化工装备》2018年第2期27-32,共6页China Chemical Industry Equipment

摘　　要：通过对SA335 P91材料过热器出口集箱焊接裂纹位置、裂纹走向及金相特征综合分析,我们认为裂纹与焊接材料的纯度及焊接过程控制有关。根据分析结果,通过调整焊接材料,并对制造过程中的装配点固焊、预热、后热、背面保护、焊接参数选择等进行控制,最终避免了焊接裂纹的产生,确保了焊缝的质量,及时地完成了产品的交付。The comprehensive analysis on welding cracks position, cracks strike and metallographic characteristics of SA335 P91 steel Superheater outlet header indicates that cracks are in relation to the pureness of welding material and welding process control. Based on analysis result, by means of adjustment on welding material and control on the tack welding of assembly, preheating, post-heating, backing shielding and welding parameters selection during fabrication process, finally the welding quality can be ensured by avoiding the occurrence of welding cracks, so as to complete the product delivery in time.

关 键 词：SA335 P91钢 焊接裂纹 杂质元素 预热 后热 线能量 

分 类 号：TG457.11[金属学及工艺—焊接]