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本文通过对10Ti、13MnTiL及15Ti三种低碳低钛冷成型结构钢的研制,论述了钛是兼有改善钢的冷成型性和提高钢的强度的最理想的元素。在冷成型结构钢中加入钛后,由于生成钛的硫化物,降低和减短了硫化锰的数量和长度;由于生成TiC减少了珠光体组织百分量,从而明显提高了冷弯性能,改善了钢的冷成型性。钛能细化钢中的粒晶;TiC的析出能产生强烈的弥散强化,这些因素都大大提高了钢的强度。钢板不同部位的TiC颗粒的粗细和疏密,是造成同卷钢板强度差的主要原因。
In this paper, the development of three kinds of low-carbon and low-Ti cold-formed structural steels, such as 10Ti, 13MnTiL and 15Ti, is discussed. Titanium is the most ideal element to improve the cold formability of steel and increase the strength of steel. The addition of titanium to the cold formed structural steel reduces and reduces the amount and length of the manganese sulphide due to the formation of titanium sulphides. The TiC reduces the percentage of the pearlite structure, resulting in a significant increase in cold bend properties and improved Cold Formability of Steel. Titanium can refine the grain of steel; TiC precipitation can produce strong dispersion strengthening, these factors have greatly enhanced the strength of steel. TiC particles in different parts of the steel thickness and density, is the main reason for the same strength with the coil.