Mea Kiʻekiʻe Kiʻekiʻe Maʻamau Rail Diesel / Fuel Injector NozzleDLLA145P574

Ka nānā ʻana i ke kumu i paʻa ai ka nozzle injector i nā injectors (mahele 2)

2.2 Nā hopena o ke ana ʻana o ka ʻili a me ka paʻakikī Ua ana ʻia ka ʻili o ka ʻili o ka ʻili, a ʻo ke koi o ka ʻili o ka ʻili he 61HRC ~ 65HRC no ka pono o ka paʻakikī o ka ʻili. 'O ka 'o'ole'a o ka pahu nila me ka helu kila HHM 'o Ra0.03, Rt0.34, a 'o ka pa'akikī o ka ili he 60.4HRC~60.7HRC; ʻO ka pahu nila me ka helu kila HD ʻo Ra0.02, Rt0.37, a ʻo ka paʻakikī o ka ʻili he 62.3HRC. 'O ka 'o'ole'a a me ka 'o'ole'a o nā kiwi kui 'elua i ho'ouna 'ia no ka nānā 'ana i nā mea e pono ai ka ho'olālā. Ma hope o ka ʻoki ʻia ʻana o ka nozzle, ua ana ʻia ka ʻawaʻawa o loko. ʻO ka koi o ka ʻawaʻawa o loko o ka nozzle he 0.05Rt0.8. Valve Ra0.07～1.16, Rt0.82～1.79. ʻAʻole i kūpono ka ʻawaʻawa o loko o nā nozzle ʻelua i hoʻouna ʻia no ka nānā ʻana i nā koi hoʻolālā.

2.3 Ke ana paakiki o ka ili a me ka huli ana i ka metallographic I ka paa o ka ili o ke kui kui e pono e 61HRC-65HRC, aole i aeia ka bainite manuahi, a o ke koena austenite aole e oi aku mamua o 5%. He 62.9HRC～63.6HRC ka paakiki o ka pahu kui me ka helu hoailona mua HHM, he 10 ka nui o ka palaoa, a he 2 ke degere o ka wela nui; ʻO ka paʻakikī o ka puʻupuʻu nila me ka helu hoʻopaʻa kila mua HD he 62.4HRC～63.4HRC, ʻo ka nui o ka palaoa he 9, a ʻo ke degere o ka superheat ʻo 2. ʻO ka paʻakikī o nā ʻāpana nila ʻelua e hoʻokō i nā koi hoʻolālā.