The structural makeup of steel has an impact on its physical characteristics. By changing the size, shape, and distribution of different elements, it is possible to get the necessary levels of mechanical characteristics. The impact of annealing temperature on the impact and hardness characteristics of 0.17% C of High Strength Low Alloy Steel is the subject of this investigation. By altering the annealing temperatures, steel sample samples were annealed to complete the investigation.The beginning temperature is determined by computing the carbon equivalent, which is 840. The following temperatures were obtained using a 30 oC interval: 840, 870, 900, 930, 960, and 990 oC. A 90-second soaking period was also employed. Their microstructures and values for hardness and impact strength were computed. The annealed sample at 840oC had the highest hardness value of 100.6 BHN and the highest impact values of 61.69 J and 63.76 J, respectively, according to the mechanical analysis results. The sample at 990oC had the lowest hardness value of 89.2 BHN and the highest impact value of 66.49 J. This study demonstrates that annealing improved the steel's fatigue property and tensile strength (wear strength). Finally, it was determined that annealing steel had a favorable effect on the mechanical characteristics of HSLA steels with 0.17% C.
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