ZG25Cr2NiMo耐磨钢的冲击性能研究

Study on Impact Properties of ZG25Cr2NiMo Wear Resistant Steel

为了获得ZG25Cr2NiMo高强度耐磨钢有较高的强度、硬度和耐磨性,其抗拉强度≥1480 MPa,常温冲击吸收能量≥30 J,-40℃冲击吸收能量≥20 J,可在各种恶劣工况环境下工作。针对起初常、低温冲击性能不合格,且冲击断裂面为严重的石状断口,大大降低了工件的使用寿命。在进行多次冲击试验、金相和电镜扫描分析,通过不断优化化学成分和热处理工艺,改善材料的断口形貌和冲击性能,最终材料获得了最优的综合性能。

In order to obtain ZG25Cr2NiMo high strength wear-resistant steel has high strength,hardness and wear resistance,its tensile strength is more than 1480 MPa,impact absorption energy at room temperature is more than 30 J,impact absorption energy at-40℃is more than 20 J,can work in a variety of harsh conditions.For the initial normal and low temperature impact performance is not qualified,and impact fracture surface is serious stone fracture,greatly reduce the service life of the workpiece.After many impact tests,metallographic and electron microscope scanning analysis,and continuous optimization of chemical composition and heat treatment process to improve the fracture morphology and impact properties of the material,the final material obtained the best comprehensive performance.