王少兰
,
费敬银
,
骆立立
,
林西华
电镀与精饰
doi:10.3969/j.issn.1001-3849.2014.01.005
介绍了钻具螺纹粘扣现象、粘扣机理以及不同类型防粘扣方法的优缺点.通过分析对比指出,具有高熔点低硬度的镀铜方法是防止螺纹发生粘扣的有效途径,同时,针对现有镀铜技术的优缺点,指出未来镀铜应着重于镀液环境友好、镀层与基体结合力良好和沉积速率快等方向发展.
关键词:
石油钻杆
,
防粘扣
,
电刷镀
,
表面改性
Huaping TANG
金属学报(英文版)
The flow stress behavior of grade G-105 steel (API standard) for oil drill pipe in hot compressive deformation was studied by isothermal compression tests on Gleeble-1500 thermal-mechanical machine. Referring to established empirical formulas, the constitutive equation of the flow stress for G-105 steel was obtained. For the grade G-105 oil drill pipe (φ114.3×10.92 mm), through proper design of the die and applying suitable process parameters, and using coupled rigid viscoplastic thermo-mechanical finite element method, the forming process of making upset on oil drill pipe was numerically simulated. The simulation results show that the internal transition section of the oil drill pipe is not only continuous and smooth but also long (up to about 220-250mm).
关键词:
Oil drill pipe
,
constitutive equation
,
end upsetting
,
numerical simulation
