压裂泵阀箱用钢的示波冲击性能及动态断裂韧性  

Instrumented Charpy Impact Testing and Dynamic Fracture Toughness of 30CrNi2MoV Steel of Frac-pump Fluid Cylinder

作　　者：王国荣[1] 陈林燕[1] 肖晓华[1] 李蓉[2] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]江汉石油管理局第四机械厂,湖北荆州434024

出　　处：《热加工工艺》2014年第16期165-168,共4页Hot Working Technology

基　　金："十二五"国家油气重大专项资助项目(2011ZX05048-04HZ)

摘　　要：对30CrNi2MoV压裂泵阀箱用钢进行880℃淬火＋560～650℃回火的调质处理,在室温下进行了CharpyV型缺口示波冲击试验,通过SEM对各个回火温度下的冲击断口形貌进行了对比分析。实验结果表明30CrNi2MoV阀箱钢的延性断裂韧度、动态断裂韧度、裂纹扩展功、冲击功等关键指标均随回火温度的升高而升高。供货态试样断口为解理形貌;560℃回火断口形貌是准解理＋韧窝;590～650℃断口是韧窝形貌。冲击韧度和冲击断口形貌有良好的对应关系。Charpy V type notch impact test of 30CrNi2MoV steel was carried out after quenching at 880 ℃ and tempering at 560 ℃-650 ℃. SEM micrographs of the fracture surfaces at different tempering temperatures were comparatively analyzed.The results show that ductile fracture toughness, dynamic fracture toughness, impact energy and crack propagation energy all increase with the increase of tempering temperature. The fracture surfaces of forge steel present cleavage patterns, the fracture surfaces present quasi-cleavage and dimple patterns at 560℃ tempering and many dimple patterns are found on fracture surfaces from 590 ℃to 650 ℃. Impact toughness and impact fracture surface has a good corresponding relation.

关 键 词：30CrNi2MoV压裂泵阀箱 调质处理 断裂韧性 断口表面 

分 类 号：TG156.3[金属学及工艺—热处理]