高品质压路机振轮用耐磨钢NM360的开发

Development of High Quality NM360 Wear-Resistant Steel for Vibration Wheel of Roller

设计和开发了压路机振轮用耐磨钢NM360(/%:0.10~0.15C,0.50~1.50Mn,≤0.001P,≤0.008S,0.20~0.50Mo,0.015~0.03Nb,0.018~0.15Ti,≥0.035Als,0.0012~0.0030B,≤0.008N,≤0.0003 H,≤0.003O)32 mm板。900℃淬火+200℃回火后,该钢组织为回火马氏体;抗拉强度1150~1182 MPa,延伸率15%~17.5%;冲击功150~226 J;表面HBW布氏硬度值385~402;冷弯直径为32 mm,冷弯角度45°、90°、150°和180°冷弯试验全部合格;采用GM120焊丝焊接后,焊接接头抗拉强度为1052 MPa,焊缝冲击功为58~63 J,焊缝HV硬度值390~396。

The wear-resistant steel NM360(/%:0.10~0.15 C,0·50~1.50 Mn,≤0.001 P,≤0·008 S,0.20~0.50 Mo,0.015~0.03 Nb,0.018~0.15 Ti,≥0.035 Als,0.0012~0.0030 B,≤0.008 N,≤0.0003 H,≤0.0030)32 mm plate for vibration wheel of roller are designed and developed.After quenching at 900℃+tempering at 200℃,the structure of steel is tempered martensite with tensile strength 1150~1182 MPa,elongation 15%~17.5%;impact energy 150~226 J;surface HBW brinell hardness value 385~402.With cold bending diameter 32 mm,and bending center angles 45°,90°,150°and 180°,the bending test is all qualified.After welding with GM120 welding wire,the tensile strength of the welded joint is1052 MPa,the impact energy of the weld is 58~63 J,and the HV hardness value of the weld is 390~396.