公开(公告)号：US09708694B2

公开(公告)日：2017-07-18

申请号：US14368184

申请日：2012-12-07

申请人： DOOSAN INFRACORE CO., LTD.

发明人： Ki Hwan Jung ,  Dong Seob Shim ,  Sik Yang ,  Jae Hyoung Hwang

IPC分类号： C22C33/04 ,  C22C33/08 ,  C22C37/10 ,  C21C1/08 ,  B22D1/00 ,  C22C37/04 ,  B22D25/02 ,  C22C37/00 ,  F02F7/00

CPC分类号： C22C33/08 ,  B22D1/00 ,  B22D25/02 ,  C21C1/08 ,  C21C2250/00 ,  C22C33/04 ,  C22C37/00 ,  C22C37/04 ,  C22C37/10 ,  F02F7/0021 ,  F02F7/0024

摘要： The present disclosure relates to a flake graphite cast iron simultaneously having high strength, good machinability, and fluidity, to a method for manufacturing same, and to an engine body comprising the flake graphite cast iron for an internal combustion engine and, more particularly, to a method for manufacturing a flake graphite cast iron, for an engine cylinder block and head having improved castability, a low possibility of the occurrence of chill due to ferroalloy, stable tensile strength and yield strength, and good machinability by adding a trace of strontium in a cast iron including carbon (C), silicon (Si), manganese (Mn), sulfur (S), and phosphorus (P), which are five elements of the cast iron, molybdenum (Mo), a high strengthening additive, and copper (Cu) while controlling the ratio (S/Sr) of the sulfur (S) content to the strontium (Sr) content in the cast ion.

公开(公告)号：US09896823B2

公开(公告)日：2018-02-20

申请号：US14483727

申请日：2014-09-11

申请人： DOOSAN INFRACORE CO., LTD.

发明人： Choung Rae Lee ,  Sang Min An ,  Young Ji Shim ,  Seok Won Song ,  Dong Seob Shim

IPC分类号： C22C38/44 ,  E02F9/28 ,  C21D6/00 ,  C21D6/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/34 ,  C22C38/00 ,  C21D9/00

CPC分类号： E02F9/285 ,  C21D6/004 ,  C21D6/008 ,  C21D6/02 ,  C21D9/0068 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/34 ,  C22C38/44

摘要： The present disclosure relates to a cast steel for construction equipment bucket parts and parts for a construction equipment bucket manufactured by using the same, and the cast steel includes 0.27 to 0.34 wt % of carbon (C), 1.2 to 1.8 wt % of chromium (Cr), 0.8 to 1.7 wt % of silicon (Si), 1.0 to 1.4 wt % of manganese (Mn), 0.2 to 0.4 wt % of molybdenum (Mo), 0.2 to 0.4 wt % of nickel (Ni), and a balance of iron and impurities.

公开(公告)号：US09719157B2

公开(公告)日：2017-08-01

申请号：US14762858

申请日：2014-01-06

申请人： Doosan Infracore Co., Ltd.

发明人： Ki Hwan Jung ,  Sik Yang ,  Jae Hyoung Hwang ,  Young Kyu Ju ,  Jong Kwon Chung ,  Yeniseul Lee ,  Dong Seob Shim

IPC分类号： C22C37/10 ,  F02F7/00 ,  C22C33/08 ,  C22C37/00 ,  C22C37/04 ,  C21C1/08 ,  F02F1/24 ,  C21D5/00

CPC分类号： C22C37/10 ,  C21C1/08 ,  C21D5/00 ,  C22C33/08 ,  C22C37/00 ,  C22C37/04 ,  F02F1/24 ,  F02F7/0085

摘要： The present disclosure relates to a manufacturing method of high-strength flake graphite cast iron, the high-strength flake graphite cast iron manufactured by the method, and an engine body including the cast iron, and more particularly, to flake graphite cast iron and a manufacturing method thereof, wherein the flake graphite cast iron has a uniform graphite shape and low probability of forming chill and has high tensile strength of at least 350 MPa and excellent workability and fluidity by controlling the content of manganese (Mn) and a trace of strontium (Sr), which are included in the cast iron, within a specific ratio.

公开(公告)号：US20150027399A1

公开(公告)日：2015-01-29

申请号：US14368184

申请日：2012-12-07

申请人： DOOSAN INFRACORE CO., LTD. .

发明人： Ki Hwan Jung ,  Dong Seob Shim ,  Sik Yang ,  Jae Hyoung Hwang

IPC分类号： C22C33/08 ,  F02F7/00 ,  B22D25/02 ,  C21C1/08 ,  C22C37/10

CPC分类号： C22C33/08 ,  B22D1/00 ,  B22D25/02 ,  C21C1/08 ,  C21C2250/00 ,  C22C33/04 ,  C22C37/00 ,  C22C37/04 ,  C22C37/10 ,  F02F7/0021 ,  F02F7/0024

摘要： The present disclosure relates to a flake graphite cast iron simultaneously having high strength, good machinability, and fluidity, to a method for manufacturing same, and to an engine body comprising the flake graphite cast iron for an internal combustion engine and, more particularly, to a method for manufacturing a flake graphite cast iron, for an engine cylinder block and head having improved castability, a low possibility of the occurrence of chill due to ferroalloy, stable tensile strength and yield strength, and good machinability by adding a trace of strontium in a cast iron including carbon (C), silicon (Si), manganese (Mn), sulfur (S), and phosphorus (P), which are five elements of the cast iron, molybdenum (Mo), a high strengthening additive, and copper (Cu) while controlling the ratio (S/Sr) of the sulfur (S) content to the strontium (Sr) content in the cast ion.

摘要翻译： 本公开涉及同时具有高强度，良好的机械加工性和流动性的片状石墨铸铁，其制造方法，以及包括用于内燃机的片状石墨铸铁的发动机主体，更具体地，涉及 用于制造片状石墨铸铁的方法，用于具有改善浇铸性的发动机气缸体和头部，由于铁合金发生冷却的可能性低，拉伸强度和屈服强度稳定，并且通过在锶中添加痕量的锶而具有良好的机械加工性 包括碳（C），硅（Si），锰（Mn），硫（S）和磷（P））的铸铁是铸铁的五个元素，钼（Mo），高强度添加剂和 铜（Cu），同时控制硫（S）含量与铸造离子中锶（Sr）含量的比（S / Sr）。