【摘 要】
：
Recent pipelines have utilized API Grade X-70 or X-80 for onshore installations and typically heavy wall API X-65 0ffshore for deep water offshore pipelines.However several new projects require capaci
【机 构】
：
Microalloyed Steel Institute,LP,Houston,Texas,USA
论文部分内容阅读
Recent pipelines have utilized API Grade X-70 or X-80 for onshore installations and typically heavy wall API X-65 0ffshore for deep water offshore pipelines.However several new projects require capacity to transport larger volumes of gas,and higher strength grades such as API X-80 or X-100 are being considered,as well as very heavy wall thicknesses and high design factors,such as 0.80 SMYS.Apart from the challenge to manufacture such pipe with appropriate DWTT properties,concerns are arising related to fracture control,weldability,strain tolerance,and property changes during coating,caused by the large plastic strains encountered during pipe making.Established data bases for the aforementioned properties are sparse,particularly full scale ductile fracture arrest results.The current state-of-the-art is summarized and suggestions presented for future research.
其他文献
Precipitation hardening is one of the most prevailing methods to strengthen alloy steels.The nature of Cu precipitation reaction is of fundamental scientific interest and technologically important.The
Spark Optical Emission Spectrometry ( OES) is one of the most commonly used and most matured analytical techniques for the analysis of metals.It is surely the preferred technique for the primary metal
Carborundum of the sample is determined by potassium fluosilicate titration.The Al2O3-SiC-C brick sample was melted with KOH and KNO3 in the nickel-rucible.Through the experiment,chose the best melt c
Generally,microstructures of coiled hot-rolled strips of micro-alloyed high-strength steel grades are quite complex and not easily quantifiable by conventional methods such as light optical microscopy
A novel stand alone bend testing device is used to determine elastic and plastic parameters of sheet metals.This method is applied where uni-axial tensile tests cannot be used to take into account the
A large scatter in impact energies was found in four Charpy V-notch impact samples taken from BC850 hot-rolled steel and tested under same conditions i.e.experiment temperature ( - 20℃ ) and impact fo
Surface peeling defect occurred in stamping process.QSTE500TM high strength hot-rolled sheet manufactured by Baosteel was applied.A layer of certain substances similar to slag is found underneath the
Determination of the threshold stress intensity for stress corrosion cracking (KIscc) of narrow areas such as weld and heat affected zone ( HAZ) of a weldment is a non-trivial task,because of requirem
Corrosion behaviour of low-alloy steel containing 1% Cr ( 1Cr) with normalized ( ferritic- pearlitic ) and quenched-and-tempered ( tempered martensitic ) microstructures was investigated in CO2 enviro
热挤压是无缝钢管的先进生产工艺，扩孔工序是挤压前准备空心钢坯的重要中间工序,而扩孔时钢坯温度对扩孔工艺有很大影响.通过计算机模拟和现场试验,研究了不同钢坯温度分布在扩孔工艺中的影响,得出的结论是钢坯温度呈径向温度线性变化,并且内表面温度低于外表面温度的温度场形态,有利于扩孔过程中的稳定性;作为影响扩孔精度的关键因素之一,钢坯的温度分布在钢坯内表面温度低于外表面温度的状态下,有利于减小扩孔余料的大小