油缸用高强韧性冷拔新材料XG720的开发  

Development of Hi-strength/toughness Cold-drawn XG720 Steel for Hydraulic Cylinder Service

作　　者：王家聪 罗海霞 杨立志 韦金钰 叶海燕 

机构地区：[1]徐州徐工液压件有限公司,江苏徐州221004

出　　处：《钢管》2016年第6期9-14,共6页Steel Pipe

摘　　要：分析了27SiMn液压油缸发生爆缸后材料断口的形貌与断裂产生过程,并提出了一种高强韧性低碳当量XG720材料;分析了XG720材料的化学成分、力学性能、机加工性能以及焊接性能。分析认为:XG720材料的最大特点是热轧正火状态具有较高的强度与较好的韧性;冷拔加工后,XG720材料的性能完全优于27Si Mn冷拔状态的性能,可以满足精密钢管的特殊要求。Analyzed are the fracture morphology and rupturing generating process of the 27SiMn material as resulting from blow-out of the hydraulic cylinder. Based on the analysis result, the hi-strength/toughness, low carbon equivalent XG720 steel is proposed. Also analyzed are the chemical composition, mechanical properties, machinability and weldability of the XG720 steel. As a result, it is identified that the XG720 steel mostly features rather high strength and good toughness after being hot-rolled and normalized, while after being cold-drawn, its properties are quite better than the as-cold-drawn 27SiMn steel, having met the special requirement for the precision steel pipe,

关 键 词：精密钢管 液压油缸缸筒 XG720材料 冷拔 强韧性 

分 类 号：TH137.51[机械工程—机械制造及自动化] TG142[一般工业技术—材料科学与工程]