根据700 MPa级别超高强集装箱用钢的特点和要求,通过合理的化学成分设计以及与之相适应的生产工艺制定,利用沉淀强化、细晶强化以及位错强化等方式实现屈服强度达到700 MPa级别。工业化试制采用以Nb,Ti微合金化为主,适当添加Cr元素的合金化思路以及控轧控冷技术,严格控制钢中P,S含量范围确保其高洁净度,控制TiN的析出尺寸以及终轧温度,卷取温度以及冷却速度等工艺参数,在莱钢1500 mm热轧生
The CCT curves of advanced atmospheric corrosion resistant steel were measured using Thermecmastor-z thermal simulator and the effects of austenite deformation on the curves and microstructures under
It is usually difficult to quantitatively determine the mass fraction of each type of precipitates in steels using transmission electron microscopy and traditional X-ray powder diffraction analysis me
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