The effects of rolling temperature, final rolling temperature and crimp temperature on microstructures and corrosion resistance of weathering steel used in landscape decoration were studied, and it was compared with the Q235 steel. The results show that with the decrease of the rolling temperature, the average grain sizes of weathering steel are gradually decreased. The reduce of final rolling temperature the grain size of the weathering steel can be reduced to a certain degree. The grain sizes of weathering steel are 10.4 μm with the crimp temperature at 540 ℃, but the grain size of weathering steel is 15.1 μm when the crimp temperature is at 640 ℃. The grain size of the weathering steel is obviously roughened with increasing the crimp temperature. The corrosion rate and corrosion depth of weathering steel developed are less than that of Q235 steel, and the corrosion resistance of weathering steel is the best under the condition of rolling temperature is 990 ℃, finishing temperature is 840 ℃ and crimp temperature is 590 ℃.
weathering steel, open rolling temperature, finishing rolling temperature, coiling temperature, properties