公开(公告)号：US20180142317A1

公开(公告)日：2018-05-24

申请号：US15647172

申请日：2017-07-11

申请人： DOOSAN HEAVY INDUSTRIES CONSTRUCTION CO., LTD.

发明人： Byoung Koo KIM ,  Kuk Cheol KIM ,  Jae Suk JEONG ,  Myeong Su JANG ,  Byung Hoon KIM

IPC分类号： C21D6/00 ,  C21D1/32 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC分类号： C21D6/004 ,  C21D1/25 ,  C21D1/32 ,  C21D6/005 ,  C21D6/008 ,  C21D7/13 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： According to an embodiment, the described hot mold steel may be excellent in high thermal conductivity to decrease the temperature difference in materials at high temperature, thereby making heat-checking properties excellent. When the hot mold steel according to the present disclosure is used for die casting, the cooling rate of the product produced using the die casting is quick, thereby improving the physical properties of the produced product and shortening the cooling time to improve productivity. Furthermore, the hot mold steel may have excellent high temperature durability, such that the die casting produced using the hot mold steel may have characteristics of a long life cycle.

公开(公告)号：US20200181724A1

公开(公告)日：2020-06-11

申请号：US16739075

申请日：2020-01-09

申请人： DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD.

发明人： Kuk Cheol KIM ,  Byoung Koo KIM ,  Jeong Wook KIM ,  Jae Suk JEONG

IPC分类号： C21D6/00 ,  C22C38/44 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D1/18 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54

摘要： A hot-work mold steel includes 0.37 to 0.46 wt % of carbon (C), 0.25 to 0.5 wt % of silicon (Si), 0.36 to 0.56 wt % of manganese (Mn), 2.0 to 5.0 wt % of chromium (Cr), 1.4 to 2.6 wt % of molybdenum (Mo), 0.4 to 0.8 wt % of vanadium (V), 0.0007 to 0.004 wt % of boron (B), 0.002 to 0.022 wt % of aluminum (Al), 0.001 to 0.09 wt % of titanium (Ti) and the remainder of iron (Fe) and inevitable impurities. The hot-work mold steel exhibits superior thermal conductivity, hardenability, durability, and nitriding characteristics, and increased resistance to heat check and melt-out. A die-casting mold made of the steel has improved thermal o conductivity regardless of mold size and a prolonged life cycle and can improve the surface quality in manufactured parts.