公开(公告)号：US20230193442A1

公开(公告)日：2023-06-22

申请号：US16764234

申请日：2018-11-06

Applicant: SMS GROUP GMBH

Inventor： Frank MASCHLER ,  Lutz KUEMMEL ,  Jean-Pierre CRUTZEN

IPC: C23C2/02 ,  C21D9/56 ,  C21D1/76

CPC classification number: C23C2/02 ,  C21D9/561 ,  C21D1/76

Abstract: Method for the preoxidation of high-strength strip steel. The invention relates to an improved method for the preoxidation of high-strength strip steel in a reaction chamber arranged in a furnace chamber. The reaction chamber is sealed at a strip entrance and a strip exit against gas exchange between the furnace chamber and the reaction chamber, and a gas that forms an oxidizing atmosphere in the reaction chamber is introduced, and the gas is continuously circulated within the reaction chamber

公开(公告)号：US20230366628A1

公开(公告)日：2023-11-16

申请号：US18030644

申请日：2021-09-13

Applicant: SMS group GmbH

Inventor： Frank MASCHLER ,  Jörg ROSTEK ,  Hardy Maaß ,  Andreas ELSING

IPC: F27D9/00 ,  F27D7/02 ,  F27B11/00

CPC classification number: F27D9/00 ,  F27B11/00 ,  F27D7/02 ,  F27D2009/0005 ,  F27D2009/0078

Abstract: A hood-type annealing furnace has a base, which has a site on which a batch of a annealing material can be arranged. The annealing material arranged on the site can be covered by a protective hood, which forms an annealing space enclosed by the protective hood and the site. The protective hood can be covered by a heating hood, thereby forming an intermediate space arranged between the heating hood and the protective hood and bounded at the bottom by the base. A cooling gas system is communicably connected or connectable to the intermediate space. The cooling gas system is communicably connected or connectable to the intermediate space, to a cooling gas outlet formed on the base and communicably connected to the intermediate space, and at least one cooling gas inlet formed on the base and communicably connected to the intermediate space.

公开(公告)号：US20230212708A1

公开(公告)日：2023-07-06

申请号：US17927975

申请日：2021-05-03

Applicant: SMS group GmbH

Inventor： Frank MASCHLER ,  Andreas BÖTTCHER ,  Pierre-Yves HALLEUX

IPC: C21D9/60 ,  C21D8/12 ,  C21D1/42 ,  C21D9/56 ,  C21D1/76 ,  C21D6/00 ,  F27B9/28 ,  F27D11/06 ,  F27B9/36 ,  F27B9/30

CPC classification number: C21D9/60 ,  C21D8/1272 ,  C21D1/42 ,  C21D8/1283 ,  C21D9/561 ,  C21D1/76 ,  C21D6/008 ,  F27B9/28 ,  F27D11/06 ,  F27B9/36 ,  F27B9/3005

Abstract: A method for the recrystallisation annealing of a non-grain-oriented electric strip (2) in a continuous annealing and coating line (1) is presented. Therein, the electric strip (2) is heated in an induction furnace (5) to a temperature of at least 680° C. at a heating rate of at least 80 K/s and then, in an optional second continuous furnace (8), to a temperature of at least 820° C. at a heating rate of at most 20 K/s. The electric strip (2) is initially heated before the induction furnace (5) via a first continuous furnace (3) to a temperature of at least 300° C. at a heating rate of at most 60 K/s.