公开(公告)号：US10718045B2

公开(公告)日：2020-07-21

申请号：US14279818

申请日：2014-05-16

申请人： AK Steel Properties, Inc.

发明人： Ralph Mutschler ,  Grant Thomas ,  Paul V. Janavicius ,  Luis G. Garza-Martinez

IPC分类号： C23C2/28 ,  C21D1/26 ,  C21D9/67 ,  C23C2/06 ,  C21D1/74 ,  C23C2/40 ,  C21D1/673 ,  C23C2/02 ,  C23C2/26 ,  C23C2/04 ,  C23C2/36 ,  C23C2/12 ,  C21D8/04 ,  B21D22/00 ,  B21D22/20 ,  C21D8/02 ,  C21D8/00 ,  C21D1/78 ,  B21D22/02

摘要： A zinc-coated steel may be produced by performing a pre-alloying heat treatment after galvannealing the steel and prior to the hot stamping the steel. The pre-alloying heat treatment is conducted at a temperature between about 850° F. and about 950° F. in an open coil annealing process. The pre-alloying heat treatment allows for shorter time at the austenitization temperature to form a desired α-Fe phase in the coating by increasing the concentration of iron. This also decreases the loss of zinc, and a more adherent oxide exists after hot stamping.

公开(公告)号：US20140342181A1

公开(公告)日：2014-11-20

申请号：US14279818

申请日：2014-05-16

申请人： AK Steel Properties, Inc.

发明人： Ralph Mutschler ,  Grant Thomas ,  Paul V. Janavicius ,  Luis G. Garza-Martinez

IPC分类号： C23C2/28 ,  C21D1/26

摘要： A zinc-coated steel may be produced by performing a pre-alloying heat treatment after galvannealing the steel and prior to the hot stamping the steel. The pre-alloying heat treatment is conducted at a temperature between about 850° F. and about 950° F. in an open coil annealing process. The pre-alloying heat treatment allows for shorter time at the austenitization temperature to form a desired α-Fe phase in the coating by increasing the concentration of iron. This also decreases the loss of zinc, and a more adherent oxide exists after hot stamping.

摘要翻译： 可以通过在对钢进行合金化并在热冲压钢之前进行预合金化热处理来制造镀锌钢。 预开合热处理在开环线退火工艺中在约850°F至约950°F之间的温度下进行。 预合金化热处理允许在奥氏体化温度下更短的时间，通过增加铁的浓度在涂层中形成所需的α-Fe相。 这也减少了锌的损失，并且在热冲压之后存在更粘附的氧化物。