采用废钢+70%~80%铁水-100 t UHP EAF-双工位120 t LF-VD-连铸-轧制工艺流程生产石油管用钢API5L BNS。通过电弧炉全程泡沫渣操作,EBT出钢合金化,连铸全程保护浇注,大压缩比、无扭微张力轧制,获得钢的良好的低倍组织、夹杂物、表面质量...采用废钢+70%~80%铁水-100 t UHP EAF-双工位120 t LF-VD-连铸-轧制工艺流程生产石油管用钢API5L BNS。通过电弧炉全程泡沫渣操作,EBT出钢合金化,连铸全程保护浇注,大压缩比、无扭微张力轧制,获得钢的良好的低倍组织、夹杂物、表面质量,满足极为严格的微量元素的控制目标,各项指标均满足用户协议要求。展开更多
为了更好评价油套管特殊螺纹接头的性能,分析了API RP 5C5:2017和ISO 13679:2002标准的差异,并基于API 5C5:2017标准,对某特殊螺纹接头进行了密封性能评价。结果表明:试样经过上卸扣试验均未发生粘扣现象,极限样台肩扭矩与上扣扭矩的比...为了更好评价油套管特殊螺纹接头的性能,分析了API RP 5C5:2017和ISO 13679:2002标准的差异,并基于API 5C5:2017标准,对某特殊螺纹接头进行了密封性能评价。结果表明:试样经过上卸扣试验均未发生粘扣现象,极限样台肩扭矩与上扣扭矩的比值为0.24~0.78;在整个复合加载试验过程中,1#~4#极限样未出现结构失效及泄漏现象,1#~5#极限样在试验过程中的保载点或失效点均超过标准要求的极限载荷,满足API RP 5C5:2017 CAL IV标准的要求。展开更多
The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expans...The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expansion coefficient, specific heat, thermal diffusivity and thermal conductivity were experimentally obtained as a function of temperature. The thermal expansion coefficient was determined at temperatures of 20°C to 1200°C in a dilatometer DIL 402 PC. The specific heat was determined on a differential scanning calorimeter at temperatures between 300°C and 1200°C. The diffusivity and thermal conductivity were determined in the temperature range 100°C to 800°C in a 457 LFA diffusivimeter using laser flash technique. The thermal expansion coefficient remained approximately with constant value of 8.5 × 10-6 K-1 and suffered two falls reaching values -25 × 10-6 K-1 and -50 × 10-6 K-1 in the stages of heating and cooling respectively. It was observed for this material, minimum and maximum values of specific heat equal to 0.571 J/gK and 1.084 J/gK at temperatures of 300°C and 720°C, respectively. The behavior of thermal diffusivity and thermal conductivity in the temperature range 100°C to 800°C tends to decrease with increasing temperature. Based on the measured properties, computational modeling of the temperature field can be numerically obtained with better accuracy.展开更多
文摘采用废钢+70%~80%铁水-100 t UHP EAF-双工位120 t LF-VD-连铸-轧制工艺流程生产石油管用钢API5L BNS。通过电弧炉全程泡沫渣操作,EBT出钢合金化,连铸全程保护浇注,大压缩比、无扭微张力轧制,获得钢的良好的低倍组织、夹杂物、表面质量,满足极为严格的微量元素的控制目标,各项指标均满足用户协议要求。
文摘为了更好评价油套管特殊螺纹接头的性能,分析了API RP 5C5:2017和ISO 13679:2002标准的差异,并基于API 5C5:2017标准,对某特殊螺纹接头进行了密封性能评价。结果表明:试样经过上卸扣试验均未发生粘扣现象,极限样台肩扭矩与上扣扭矩的比值为0.24~0.78;在整个复合加载试验过程中,1#~4#极限样未出现结构失效及泄漏现象,1#~5#极限样在试验过程中的保载点或失效点均超过标准要求的极限载荷,满足API RP 5C5:2017 CAL IV标准的要求。
文摘The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expansion coefficient, specific heat, thermal diffusivity and thermal conductivity were experimentally obtained as a function of temperature. The thermal expansion coefficient was determined at temperatures of 20°C to 1200°C in a dilatometer DIL 402 PC. The specific heat was determined on a differential scanning calorimeter at temperatures between 300°C and 1200°C. The diffusivity and thermal conductivity were determined in the temperature range 100°C to 800°C in a 457 LFA diffusivimeter using laser flash technique. The thermal expansion coefficient remained approximately with constant value of 8.5 × 10-6 K-1 and suffered two falls reaching values -25 × 10-6 K-1 and -50 × 10-6 K-1 in the stages of heating and cooling respectively. It was observed for this material, minimum and maximum values of specific heat equal to 0.571 J/gK and 1.084 J/gK at temperatures of 300°C and 720°C, respectively. The behavior of thermal diffusivity and thermal conductivity in the temperature range 100°C to 800°C tends to decrease with increasing temperature. Based on the measured properties, computational modeling of the temperature field can be numerically obtained with better accuracy.
