Research on welding process of cast steel AAR M 201

铸钢AAR M 201焊接工艺研究 Research on welding process of cast steel AAR M 201 陈丽园 CHEN Liyuan 1 first-author 穆云平 MU Yunping 1 郭瑞青 GUO Ruiqing 1 么振江 YAO Zhenjiang 1 孙逸凡 SUN Yifan 2 corresp 1377748054@qq.com 中车唐山机车车辆有限公司 中车唐山机车车辆有限公司 CRRC Tangshan Co.,Ltd. CRRC Tangshan Co.,Ltd. 大连交通大学 大连交通大学 Dalian Jiaotong University Dalian Jiaotong University 对不同预热温度和坡口形式的铸钢AAR M 201与低合金钢高强钢ASTM A588进行GMAW焊,并对其焊接接头进行拉伸、弯曲和冲击试验,确定其铸钢结构焊接工艺。结果表明:8 mm及以下板对接的预热及层间温度不得低于150 ℃、8～20 mm板对接的预热温度不得低于300 ℃,无论坡口形式是8 HV还是10 DHV,焊接接头都具有良好的抗拉强度;两种坡口形式的焊接接头弯曲180°均合格,都具有良好的塑性和韧性;无论是焊缝还是热影响区,两种坡口形式的焊接接头都具有良好的低温冲击韧性。 Cast steels AAR M 201 with different preheating temperatures and groove forms are welded with low alloy and high strength steel ASTM A588. The tensile, bending and impact tests are performed on welded joints to determine the welding process of cast steel structure. The results show that for butt joint of 8 mm and below,the preheating and interpass temperature must not be lower than 150 ℃ ;for butt joint of 8 ～20 mm,the preheating temperature must not be less than 300 ℃.Both 8 HV and 10 DHV,the welded joints have good tensile strength, plasticity and toughness,and welded joints with 180°bending are qualified. Both weld and heat affected zone,welded joints have good low temperature impact toughness. AAR M 201 焊接工艺 力学性能 AAR M 201 welding process mechanical properties U260.6;TG457.11 2022-03-08 5 51