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一、绪言一般说来汽油机和柴油机进气阀的工作温度是在450℃以下。这就要求这种进气阀具有以下几种特性:(1)在工作温度下应该有很强的抗软化性。(2)应该有良好的抗氧化性和耐蚀性。(3)应该有较高的高温疲劳强度。(4)应该有良好的耐磨性。目前,进气阀大多数是使用SUH3钢(碳0.4,硅2,铬11,钼1)和SUH11钢(碳0.5,硅1.5,铬8.5),但是,从气阀工作温度所推断出来的抗氧化性来看,添加
First, the introduction Generally speaking, gasoline and diesel engine inlet valve operating temperature is below 450 ℃. This requires that this intake valve has the following characteristics: (1) at the operating temperature should have a strong resistance to softening. (2) should have good oxidation resistance and corrosion resistance. (3) There should be a high temperature fatigue strength. (4) should have good wear resistance. Currently, most of the intake valves use SUH3 steel (carbon 0.4, silicon 2, chromium 11, molybdenum 1) and SUH11 steel (carbon 0.5, silicon 1.5, chromium 8.5), but the inferred resistance from the valve operating temperature Oxidation point of view, add