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研究了微量Nb对MnV基的非调质微合金钢的冶金力学特性的影响。铌的加入进一步细化晶粒,促进析出作用。铌不单本身析出,而且促进钒的析出。配合以钢的其他成分调整,如降碳、增锰、调硅及钢的热加工工艺控制,细化了铁素体晶粒和珠光体团,稀释了珠光体,改变了珠光体一渗碳体形貌和尺寸。钢的强度和韧性得到提高和改善,研究一种新型铌钒微合金非调质钢。
The effect of micro Nb on the metallurgical properties of MnV-based non-tempered microalloyed steels was studied. The addition of niobium to further refine the grain, promote precipitation. Not only niobium precipitation itself, but also promote the precipitation of vanadium. With the adjustment of the other components of steel, such as carbon reduction, manganese, silicon and steel thermal processing process control, refining the ferrite grains and pearlite groups, diluted pearlite, pearlite changed a carburizing Body shape and size. The strength and toughness of the steel are improved and improved, and a new type of niobium-vanadium microalloy non-quenched and tempered steel is studied.