高强度马氏体不锈钢的小能量冲击疲劳行为研究  

Analysis of Impact Fatigue Behavior on High Strength Martensitic Stainless Steel

作　　者：张晓川 王景芹 王清铎 林亮[2] 李刚[2] 党宁 韩礼红 ZHANG Xiaochuan;WANG Jingqin;WANG Qingduo;LIN Liang;LI Gang;DANG Ning;HAN Lihong(Daqing Oil Field Production Technology Institute,Daqing,Heilongjiang 163453,China;Downhole Operation Company of Daqing Oilfield,Daqing,Heilongjiang,163000,China;State Key Laboratory of Oil and Gas Equipment,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China)

机构地区：[1]中国石油大庆油田有限责任公司采油工艺研究院,黑龙江大庆163453 [2]大庆油田井下作业分公司,黑龙江大庆163000 [3]中国石油集团工程材料研究院有限公司,油气钻采输送装备全国重点实验室,陕西西安710077

出　　处：《石油管材与仪器》2024年第4期24-30,I0002,共8页Petroleum Tubular Goods & Instruments

基　　金：陕西省青年基金项目“电脉冲处理诱发增材制造钛合金成形件中电致缺陷修复/电致塑性行为的微观机理研究”(编号:2023-JC-QN-0032);黑龙江省揭榜挂帅科技项目“古龙页岩油增产改造关键技术研究”(编号:2021ZZ10-04)。

摘　　要：随着钻具失效的不断发生,越来越多的研究者进行服役工况下钻具失效-断裂行为的机理研究。在服役过程中钻具受到复杂载荷的作用,既有静载荷也有大能量单次冲击载荷和小能量多次冲击载荷,小能量多次冲击载荷会造成材料冲击疲劳。研究了新型高强度马氏体不锈钢在不同冲击能量下的材料的冲击疲劳失效行为。结果表明,材料的冲击疲劳寿命的影响因素主要是加载的冲击能量,即冲击能量越高材料的冲击疲劳寿命越低,但冲击能量的变化不会改变材料的断裂形式。在疲劳裂纹萌生阶段,冲击能量的提高可使裂纹快速萌生。在疲劳裂纹扩展阶段,冲击载荷作用于裂纹尖端并使裂纹逐渐扩展。最后,建立了裂纹长度a与循环周次N的函数关系,计算了裂纹的扩展速率。With the frequent occurrence of drill string failures,researchers have been focusing on the mechanism of drill string failure-fracture behavior under service conditions.Drill strings are undertaken complex loads during service,including both static loads and high-energy single impact loads,as well as low-energy multiple impact loads,which results in material impact fatigue.Therefore,impact fatigue failure behavior of a novel high-strength martensitic stainless steel under different impact energies was investigated.The results indicate that the primary factor influencing the impact fatigue life of the material is the applied impact energy.The higher the impact energy,the lower the impact fatigue life of the material,however the variation of impact energy may not change the fracture mode of the material.During the initiation stage of fatigue crack,an increase of impact energy can lead to rapid crack initiation.Within the propagation stage,impact loads can act on the crack tip and lead to extending gradually for the crack.Finally,a functional relationship between crack length(a)and the number of cycles(N)was established,by which the crack propagation rate was calculated.

关 键 词：高强度马氏体不锈钢 动态拉伸 高应变率 冲击疲劳 Paris公式 

分 类 号：TG142.71[一般工业技术—材料科学与工程]