The hot rolling process of ASTM A209 T1 seamless steel tube, as the name implies, has a high temperature of the rolled piece, so the deformation resistance is small, and large amounts of deformation can be achieved. Take the rolling of steel plate as an example, the general thickness of continuous casting billet is about 230mm, and after rough rolling and finishing rolling, the thickness is 1~20mm.
Because the width and thickness ratio of steel plate is small, the dimensional accuracy requirement is relatively low, it is not easy to appear the shape problem, mainly to control the crown. For ASTM A209 T1 seamless steel tube requirements, generally through the control of rolling control cooling to achieve, that is, the control of finishing rolling starting temperature, finishing temperature. Round tube billet → heating → perforation → heading → annealing → pickling → oil coating → multi-pass cold drawing → billet → heat treatment → straightening → hydrostatic test → marking → storage. The delivery state of hot-rolledASTM A209 T1 seamless steel tube is generally hot-rolled after heat treatment.
After the hot rolled ASTM A209 T1 seamless steel tube quality inspection to be through the staff of strict manual selection, after the quality inspection to carry out surface oil, followed by many cold drawing experiments, ASTM A209 T1 seamless steel tube hot rolled after the perforation of the experiment, if the perforation expansion is too large to be straightened.
