• structural steel
  • 2017/1/20 Read the number:[1046]
  • Low alloy structural steel 1, high strength, high plasticity and toughness, good welding performance. Widely used in buildings, bridges, etc.. 2, chemical composition of low carbon steel (carbon content of <0.2%); the main alloying element is Mn (content of 1.25~1.5%). 3, heat treatment characteristics generally do not heat treatment. 4, 16Mn, 15MnTi and other commonly used steel. Alloy carburizing steel 1, performance characteristics for the production of hard and wear-resistant surface, good toughness and impact resistance of the parts, such as gears, cams, etc.. (with good carburizing and quenching) 2, chemical composition characteristics of low carbon steel (carbon content of 0.1~0.25%); the main alloying elements are Cr, Mn, Ti, V and so on, its main role is to improve hardenability and prevent overheating. 3, characteristics of heat treatment of pre heat treatment for normalizing, carburizing after quenching and low temperature tempering. In the case of the 20CrMnTi production of auto gearbox as an example, the process is as follows: forging - tooth - processing - normalizing local Cu pre cooling of carburizing quenching and tempering - shot peening and grinding. 4, 20Cr 20CrMnTi 20CrMnTi, commonly used steel steel for automobile transmission gear heat treatment process curve
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