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本文介绍柴油机气缸套渗氮试验数据.渗氮可以提高气缸套的耐磨性、抗疲劳性和抗穴蚀性.材质为38??号钢的气缸套一般都进行渗氮. 我们曾经采用渗氮来强化??号(3.53～3.57%C,2.02～2.20%Si,0.87～0.90%Mn,0.05～0.06%P,0.015～0.016%S,0.06～0.09%Cr,0.06～0.09%Mg)及加有0.90～1.70%Ni、0.4～0.5%Mo和0.006%Ze高强度铸铁气缸套(图1). 在铸铁中加入镍和钼是为了使气缸套具有所需的机械性能和高硬度渗氮层.??号铸铁气缸套机械加工后进行了下列热处理:正火,加热到880～900℃,保温3～4小时,空冷(在炉底);高温回火,加热到580～610℃,保温4～5小时,空冷.加有镍和铝的铸铁(??)气缸套的正火温度与上同,但回火温
In this paper, diesel engine cylinder liner nitriding test data nitriding can improve the wear resistance of the cylinder liner, fatigue resistance and corrosion resistance of the material for the 38 # steel cylinder liner are generally nitriding we have used seepage Nitrogen to strengthen the number (3.53 ~ 3.57% C, 2.02 ~ 2.20% Si, 0.87 ~ 0.90% Mn, 0.05 ~ 0.06% P, 0.015 ~ 0.016% S, 0.06 ~ 0.09% Cr, 0.06 ~ 0.09% Mg) and Plus 0.90 to 1.70% Ni, 0.4 to 0.5% Mo and 0.006% Ze high strength cast iron cylinder liners (Figure 1). Nickel and molybdenum are added to the cast iron to provide the cylinder liner with the required mechanical properties and high hardness nitriding Layer cast iron cylinder liner after the following heat treatment: normalizing, heated to 880 ~ 900 ℃, heat 3 to 4 hours, air-cooled (at the bottom of the furnace); high temperature tempering, heated to 580 ~ 610 ℃, Insulation 4 ~ 5 hours, air-cooled. Add nickel and aluminum cast iron (??) cylinder liner normalizing temperature and the same, but the tempering temperature