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近年来,应用冷激合金铸铁代替渗碳气门挺杆,可增加耐磨性、提高接触疲劳强度和抗咬合性,同时还可减少与其配对的凸轮轴的磨损及烧伤,可大大提高摩擦副的使用寿命。我厂生产的6102Q气门挺杆就是采用冷激合金铸铁制造的。技术要求是:B面激冷,白口深1.5～3毫米,回火后硬度HRC50～56;球面R5局部淬硬到≥HRC48;其余部分硬度HB217～255。我们对铸件进行420℃、3小时,炉冷至150℃
In recent years, the application of cold-cast alloy cast iron instead of carburizing valve tappet, can increase the wear resistance and improve the contact fatigue strength and seizure resistance, while reducing its matching camshaft wear and burns can greatly improve the friction pair Service life. 6102Q valve tappet produced by our factory is made of cold-shock alloy cast iron. Technical requirements are: B side chilling, white mouth deep 1.5 to 3 mm, after tempering hardness HRC50 ~ 56; spherical R5 local hardening to ≥ HRC48; the rest of the hardness HB217 ~ We cast the workpiece at 420 ℃, 3 hours, furnace cooling to 150 ℃