公开(公告)号：US12104508B1

公开(公告)日：2024-10-01

申请号：US18710730

申请日：2022-11-15

申请人： COSCO SHIPPING MARINE EQUIPT & SPARES (NJ) CO., LTD

发明人： Hong Lu ,  Weiwei Dai ,  Lihe Jiang ,  Guozheng Quan ,  Xiaolin Zhang

IPC分类号： C22C19/05 ,  B21J5/02 ,  C22F1/10 ,  F01L3/02

CPC分类号： F01L3/02 ,  B21J5/02 ,  C22C19/058 ,  C22F1/10

摘要： Provided are a large-size diesel exhaust valve and a manufacturing method thereof, which relate to the technical field of manufacturing of large-size diesel exhaust valves for ships. The large-size diesel exhaust valve includes an exhaust valve disc portion made of a 3J40 alloy, and the large-size diesel exhaust valve has the following microstructure: there are ultra-fine grains with a grain size of 10 grade or more, α-Cr lamellar phases are evenly distributed at grain boundaries of the ultra-fine grains, nickel-lean Cr—Al—Ce particle phases are evenly distributed in a matrix, a single lamella of the α-Cr lamellar phases has a thickness of less than 140 nm, and the nickel-lean Cr—Al—Ce particle phases have a diameter of less than 10 μm. The present application solves the technical problem of how to improve the comprehensive mechanical properties and the vibration-damping performance of a large-size diesel exhaust valve simultaneously.