一、原始情况电力机车旁承簧,系直径40毫米60Si_2Mn弹簧钢卷制而成。卷制前在重油炉内加热,炉温控制在1050～1100℃。卷制后立即整形,当弹簧温度在860～880℃时,淬入20～60℃水中,不采用二次加热淬火方法。在一次生产中,弹簧经加热卷制淬火后,发现外图表面有鱼鳞状裂缝(见图1)。经 First, the original situation Next to the electric locomotive spring, the Department of diameter 40 mm 60Si_2Mn spring made of rolled steel. Before heating heavy oil furnace heating, furnace temperature control at 1050 ~ 1100 ℃. Immediately after roll shaping, when the spring temperature at 860 ~ 880 ℃, quenched into 20 ~ 60 ℃ water, do not use the method of secondary heating quenching. In a production, the spring after heating the coil quenching and found on the surface of the outer surface of fish-scale cracks (see Figure 1). through