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(一)喷油嘴偶件使用寿命与其材料的抗回火性能喷油嘴是柴油机燃油系统中最重要的偶件之一,它由针阀和针阀体两者构成。在工作温度下承受高压高频率的反复冲击,因此其工作条件极为恶劣。影响喷油嘴使用寿命的因素有结构设计,加工制造和材质选用等,本文仅对喷油嘴针阀体材质选用方面谈一点看法。我国目前制造针阀体的材料,一般采用
(A) the life of the nozzle and the anti-tempering performance of its material Fuel injection nozzle is one of the most important dual-fuel system diesel engine parts, which consists of needle valve and needle valve body. Under the working temperature to withstand high-pressure high-frequency repeated impact, so its working conditions are extremely poor. Affect the life of the nozzle life factors are structural design, manufacturing and material selection, etc., this article only on the needle valve body material selection point of view. China’s current manufacturing needle valve material, generally used