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,
出处
《钢管》
CAS
2016年第6期9-14,共6页
Steel Pipe
关键词
精密钢管
液压油缸缸筒
XG720材料
冷拔
强韧性
precision steel pipe
hydraulic cylinder body
XG720 steel
cold-drawn
strength/toughness
