Optimization of Carbon Reduction and Efficiency Enhancement Process for Hot-Rolled Ribbed Steel Bars

The grain size and microstructureMicrostructure distribution of hot-rolled ribbed steelSteel bar play a vital role in its comprehensive mechanical propertiesMechanical properties. This article calculates the phase transition temperatureTemperature and CCT curve through thermodynamic software. The calculation results provide theoretical support for the production of carbon reduction and efficiency enhancing hot-rolled ribbed steelSteel bars. The results indicate that the theoretical phase transition temperatureTemperature for austenite to ferrite is 810 ℃. According to the CCT curve, when the cooling rateCooling rate is 5 ℃/s, the temperatureTemperature at which austenite transforms into bainite is 544.3 ℃. The grain size decreases with the decrease of finish rolling temperatureTemperature and wire drawing temperatureTemperature. The average grain size has increased from 11.5 level of the original processProcess test steelSteel to 12.5 level of the optimized processProcess. Compared with test steelSteel 1 # and 6 #, the average grain size increased from 11.5 to 12.5, and the proportion of pearlite increased from 53 to 67%. The experimental steelSteel bars produced by the 6 # processProcess have the best uniformity. After optimizing the processProcess, the cost per ton of steelSteel will be reduced by 10 yuan, and 350 tons of carbon dioxide will be reduced throughout the year.