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用铋锡微合金化的铜铬冷硬铸铁制造的挺柱,在4160高速柴油机高接触应力(870MPa)的挺柱——凸轮磨擦副中运行1500小时后,挺柱磨擦表面光滑,无剥落划伤,未见明显磨损。这类铸铁的优点是:(1)不含钼等贵重金属,成本低廉;(2)熔化操作简便,质量稳定,铸造工性能好;(3)与一般冷硬铸铁材料比,白口层容易控制,白口层硬度值高(HRC52～55),等温淬火后硬度为 HRC61～65,耐磨性好,是一种新型的冷硬铸铁材料
Tappet made of copper-chromium chrome cast iron micro-alloyed tappet, 4160 high-speed diesel engine high contact stress (870MPa) tappet - cam friction pair for 1500 hours after operation, the tappet friction surface smooth, no flaking No obvious wear and tear The advantages of this type of cast iron are: (1) does not contain precious metals such as molybdenum, low cost; (2) easy to melt, stable quality, good casting performance; (3) compared with the general chilled cast iron material, Control, white stratum hardness (HRC52 ~ 55), hardness after isothermal quenching HRC61 ~ 65, good wear resistance, is a new type of chilled cast iron material