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L_4-17/320型氮-氢压缩机的十字头销,系采用φ65×155mm的45钢,经调质、高频表面淬火和低温回火制成。在装机运转一段时间后,发生十字头销突然脆断,造成了严重的设备事故。压缩机的十字头销是连接连杆和活塞杆的构件之一,除承受摩擦和冲击外,还要承受交变的弯曲和剪切应力,要求具有高的强度和硬度,足够的冲击韧性,良好的耐磨性和耐疲劳性等。十字头销的技术要求为:调质硬度HRC24～32;φ50dc表面高频淬火回火硬度HRC57～67,在同一零件上的硬度
L_4-17 / 320 Nitrogen - hydrogen compressor crosshead pin, the Department of φ65 × 155mm 45 steel, the quenched and tempered, high-frequency surface hardening and low temperature tempering made. After a while in installed capacity, a sudden brittle fracture of the crosshead pin occurred, causing a serious equipment accident. The crosshead pin of the compressor is one of the components that connect the connecting rod and the piston rod. In addition to the friction and impact, the compressor also needs to bear the alternating bending and shearing stress, which requires high strength and hardness, sufficient impact toughness, Good wear resistance and fatigue resistance. Crosshead pin technical requirements: quenching and tempering hardness HRC24 ~ 32; φ50dc surface quenching and tempering hardness HRC57 ~ 67, the hardness of the same parts