公开(公告)号：US20150174688A1

公开(公告)日：2015-06-25

申请号：US14451759

申请日：2014-08-05

申请人： Hyundai Motor Company ,  Dong-eui University Industry-Academic Cooperation Foundation

发明人： Ji Hong Yoo ,  Seung Hyun Hong ,  Yeong Do Park ,  Jae Won Kim

IPC分类号： B23K11/11 ,  B23K11/16 ,  B23K11/24

CPC分类号： B23K11/11 ,  B23K11/16 ,  B23K11/166 ,  B23K11/241 ,  B23K2103/04

摘要： A spot welding method for a high strength steel sheet is provided. The method includes a first pulse step for applying electric current of about 8 to 9 kA about 1 to 3 cy and a first cooling step for cooling for about 1 to 3 cy. In addition, the method includes a second pulse step for applying electric current less than the electric current applied in the first pulse step and a second cooling step for cooling for about 1 to 3 cy. A third pulse step includes applying electric current greater than the electric current applied in the second pulse step.

摘要翻译： 提供了一种高强度钢板的点焊方法。 该方法包括第一脉冲步骤，用于施加大约1至3个cy的约8至9kA的电流和用于冷却约1至3个cy的第一冷却步骤。 此外，该方法包括：第二脉冲步骤，用于施加小于在第一脉冲步骤中施加的电流的电流;以及第二冷却步骤，用于冷却约1至3个cy。 第三脉冲步骤包括施加大于在第二脉冲步骤中施加的电流的电流。

公开(公告)号：US20240174885A1

公开(公告)日：2024-05-30

申请号：US18336598

申请日：2023-06-16

申请人： Hyundai Motor Company ,  Kia Corporation

发明人： Sung Ho Park ,  Jong Yang Park ,  Jae Won Kim ,  Young Ho Jo ,  Dong Woo Kim

IPC分类号： C09D123/28 ,  B05D7/00 ,  C09D5/00 ,  C09D7/20 ,  C09D7/63 ,  C09D167/00 ,  C09D169/00

CPC分类号： C09D123/283 ,  B05D7/572 ,  C09D5/002 ,  C09D7/20 ,  C09D7/63 ,  C09D167/00 ,  C09D169/00

摘要： An embodiment primer coating composition includes 20 to 25 wt % of a chlorinated polyolefin (CPO) resin having a weight-average molecular weight (Mw) of 50,000 to 100,000 g/mol, 2 to 4 wt % of a modified polyester, and 75 to 85 wt % of a hydrocarbon-based solvent. An embodiment coated automotive article includes a printing layer on a base layer, the printing layer including a laser pattern, a primer layer on the printing layer, the primer layer including a primer coating composition including 20 to 25 wt % of a chlorinated polyolefin (CPO) resin having a weight-average molecular weight (Mw) of 50,000 to 100,000 g/mol, 2 to 4 wt % of a modified polyester, and 75 to 85 wt % of a hydrocarbon-based solvent, and a clear layer on the primer layer.