local strain induced by the shrinkage of the weld often reaches several times the yield point strain, which is much larger than the strain caused by the load. The residual stress caused by uneven cooling can be obtained. Residual stress is the internal self-equilibrium stress in the absence of external force. Hot-rolled steel of all kinds of cross-section has such residual stress. The larger the general section size of steel, the greater the residual stress. Although the residual stress is self-balanced, but the performance of steel components in the external force or have a certain impact. Such as deformation, stability, fatigue and other aspects may have adverse effects. Hot rolled steel products have poor control over thickness and edge width. We are familiar with thermal expansion and contraction, since the beginning of the hot rolled out even the length and thickness of the standard, the final cooling or there will be some negative difference, the negative side of the wide and wide, thicker the performance of the more obvious. So for large steel, the width, thickness, length, angle, and edge of the steel can not be too precise. The advantages and disadvantages of hot-rolled plates, over Xiaobian temporarily to share here, I hope you
houses with rooftop living areaspolyethylene fence panels life timepvc bath bench slats for sale
