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用12铬钼钒珠光体耐热钢制造的高温金属部件在高温下长时间运行后,钢中合金元素会从固溶体内逐渐转移到碳化物中,使固溶体的强化元素大量贫化和碳化物本身的球状化。因此钢的耐热性能降低,钢的塑性和韧性也会随之降低,从而给高温金属部件的正常运行带来困难,甚至酿成热力设备的严重事故。
After the high-temperature metal parts made of 12 Cr, Mo, and Pearlite heat-resisting steel are operated at a high temperature for a long time, alloying elements in the steel are gradually transferred from the solid solution into the carbide to make the strengthening elements of the solid solution largely depleted and the carbide itself Spheroidization. Therefore, the heat resistance of steel is reduced, and the ductility and toughness of the steel are also reduced, thereby causing difficulties in the normal operation of high-temperature metal parts and even causing serious accidents in the thermal equipment.