S271低合金钢堆焊镍基合金稀释率影响因素研究

S271低合金钢堆焊镍基合金稀释率影响因素研究 Study on influence factors of dilution rate in overlaying of nickel base alloy on S271 low alloy steel 黄卫东 HUANG Weidong 1 first-author 柏忠炼 BAI Zhonglian 1 叶义海 YE Yihai 1 王建 WANG Jian 1 罗绪珍 LUO Xuzhen 1 王飞 WANG Fei 1 潘晓东 PAN Xiaodong 1 李红军 LI Hongjun 1 中国核动力研究设计院 中国核动力研究设计院 Nuclear Power Institute of China Nuclear Power Institute of China 针对核电站用S271低合金钢上堆焊690镍基合金,研究焊接速度、送丝速度和焊接电流对单层单道焊稀释率的影响。结果表明,焊缝稀释率与其均有关。当焊接电流与焊接速度一定时,稀释率随送丝速度增大而降低;当焊接电流和送丝速度一定时,稀释率随焊接速度的增加而增加;当焊接速度和送丝速度一定时,稀释率随焊接电流的增大而增大。但是在热输入一定和焊接电流电压保持不变的情况下,改变送丝速度与焊接速度几乎不影响焊缝稀释率。 Aiming at the overlaying of 690 nickel base alloy on S271 low alloy steel for nuclear power plant,the influence factors of single layer single pass welding dilution are studied.The results show that the dilution rate of weld is related to welding speed,wire feed rate and welding current. When the welding current and welding speed are constant,the dilution rate reduces as the wire feed rate increases;when the welding current and wire feed rate are constant,the dilution rate increases as the welding speed increases;when the welding speed and wire feed rate are constant,the dilution rate increases as the welding current increases. However,when the heat input,welding current and voltage are constant,changing the wire feed rate and welding speed will hardly affect the dilution rate of weld. 堆焊 稀释率 低合金钢 镍基合金 焊接工艺 overlaying dilution rate low alloy steel nickel base alloy welding technology TG455;TM623 2022-03-08 6 50