公开(公告)号：EP3298174A1

公开(公告)日：2018-03-28

申请号：EP16726750.9

申请日：2016-05-20

申请人： Ak Steel Properties, Inc.

发明人： GARZA-MARTINEZ, Luis, Gonzalo ,  THOMAS, Grant, Aaron

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D8/02

CPC分类号： C22C38/06 ,  C21D1/26 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/52 ,  C21D11/00 ,  C21D2211/001 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12

摘要： A high strength steel comprises, during intercritical annealing, about 20-80% volume ferrite and 20-80% austenite, and wherein the Ms temperature calculated for the austenite phase during intercritical anneal ≦100° C. The high strength steel exhibits a tensile elongation of at least 20% and an ultimate tensile strength of at least 880 MPa. The high strength steel may comprise 0.20-0.30 wt % C, 3.0-5.0 wt % Mn, with Al and Si additions such that the optimum intercritical temperature is above 700° C.

公开(公告)号：EP3245310A2

公开(公告)日：2017-11-22

申请号：EP16706031.8

申请日：2016-01-14

申请人： Ak Steel Properties, Inc.

发明人： THOMAS, Grant, Aaron ,  BARROS LOSZ, Jose, Mauro ,  GARZA-MARTINEZ, Luis, Gonzalo ,  CASE, Eddie, Ray ,  PETERSEN, Eric ,  RASTOGI, Prabhat

IPC分类号： C22C38/04 ,  C21D8/04

CPC分类号： C21D9/46 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0478 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/06 ,  C23C2/26

摘要： A method for processing a dual phase steel sheet. The method includes heating the steel sheet to a first temperature (T1), cooling the steel sheet to a second temperature (T2), transitioning the steel sheet to a third temperature (T3), and cooling the steel sheet to room temperature. T1 is at least above the temperature at which the steel sheet transforms to austenite and ferrite. T2 is below the martensite start temperature (Ms). The cooling rate to T2 is sufficiently rapid to transform at least some austenite to martensite.

公开(公告)号：EP3039164A1

公开(公告)日：2016-07-06

申请号：EP14766046.8

申请日：2014-08-26

申请人： Ak Steel Properties, Inc.

发明人： SCHOEN, Jerry, William ,  WILKINS, Christopher, Mark

IPC分类号： C21D1/76 ,  C21D8/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34

CPC分类号： H01F1/14783 ,  C21D1/76 ,  C21D8/1222 ,  C21D8/1255 ,  C21D8/1283 ,  C21D8/1288 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  H01F1/14791

摘要： Increasing the chromium content of an electrical steel substrate to a level greater than or equal to about 0.45 weight percent (wt%) produced a much improved forsterite coating having superior and more uniform coloration, thickness and adhesion. Moreover, the so-formed forsterite coating provides greater tension potentially reducing the relative importance of any secondary coating.

公开(公告)号：EP2997173A1

公开(公告)日：2016-03-23

申请号：EP14730045.3

申请日：2014-05-16

申请人： Ak Steel Properties, Inc.

发明人： MUTSCHLER, Ralph ,  THOMAS, Grant, Aaron ,  JANAVICIUS, Paul, Valdas ,  GARZA-MARTINEZ, Luis, G.

IPC分类号： C23C2/06 ,  C23C2/28 ,  C21D1/78 ,  B21D22/02 ,  C21D1/673

CPC分类号： C23C2/28 ,  B21D22/022 ,  C21D1/26 ,  C21D1/673 ,  C21D1/74 ,  C21D1/78 ,  C21D9/67 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  Y10T428/12799

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：EP2997168A2

公开(公告)日：2016-03-23

申请号：EP14734592.0

申请日：2014-05-16

申请人： Ak Steel Properties, Inc.

发明人： THOMAS, Grant, Aaron ,  LOSZ, Jose Mauro, B.

IPC分类号： C21D8/02 ,  C21D9/46 ,  C23C2/02 ,  C23C2/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/18 ,  C21D1/18 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34

CPC分类号： C22C38/38 ,  C21D1/18 ,  C21D1/785 ,  C21D6/005 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40

摘要： Steel with high strength and good formability is produced with compositions and methods for forming austenitic and martensitic microstructure in the steel. Carbon, manganese, molybdenum, nickel copper and chromium may promote the formation of room temperature stable (or meta-stable) austenite by mechanisms such as lowering transformation temperatures for non-martensitic constituents, and/or increasing the hardenability of steel. Thermal cycles utilizing a rapid cooling below a martensite start temperature followed by reheating may promote formation of room temperature stable austenite by permitting diffusion of carbon into austenite from martensite.

摘要翻译： 钢具有高强度和良好的成形性产生与组合物和方法在钢中形成奥氏体和马氏体的显微组织。 如降低转变温度的非马氏体成分，和/或增加钢的淬透：碳，锰，钼，镍铜和铬可以通过奥氏体机制促进室温下稳定（或亚稳定）的形成。 热循环利用低于马氏体转变起始温度快速冷却随后再加热可以通过允许碳扩散到奥氏体从马氏体促进形成室温下稳定奥氏体的。

公开(公告)号：EP2834381A1

公开(公告)日：2015-02-11

申请号：EP13716682.3

申请日：2013-04-02

申请人： Ak Steel Properties, Inc.

发明人： DOUTHETT, Joseph, A. ,  CRAYCRAFT, Shannon, K.

IPC分类号： C22C38/20 ,  C21C5/00 ,  C22C38/22 ,  C22C38/40 ,  C22C38/50

CPC分类号： C22C38/001 ,  C21D6/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50

摘要： A cost effective ferritic stainless steel exhibits improved corrosion resistance comparable to that observed on Type 304L steel. The ferritic stainless steel is substantially nickel-free, dual stabilized with titanium and columbium, and contains chromium, copper, and molybdenum.

摘要翻译： 具有成本效益的铁素体不锈钢表现出与304L型钢相似的耐腐蚀性。 铁素体不锈钢基本上是无镍的，用钛和铌双重稳定，并含有铬，铜和钼。

公开(公告)号：EP2352861A2

公开(公告)日：2011-08-10

申请号：EP09752678.4

申请日：2009-11-12

申请人： Ak Steel Properties, Inc.

发明人： MADI, Vijay, N. ,  GLASS, Amanda, R.D. ,  RODABAUGH, Ronald, D.

IPC分类号： C23G1/08 ,  C23G3/02

CPC分类号： C23G1/086 ,  C23G1/00 ,  C23G3/021 ,  C23G3/029

摘要： The pickling process designed for pickling electrical steel strip in a continuous fashion comprising immersing the strip in at least one pickling tub. The pickling tub contains a mixture of HCl, Fe2+, and Fe3+ and a low concentration of HF. Upon exiting the final pickling tub, the strip may be brushed or scrubbed to loosen any residual scale to form a clean strip.

摘要翻译： 设计用于以连续方式酸洗电工钢带的酸洗工艺包括将带浸入至少一个酸洗槽中。 酸洗槽含有HCl，Fe 2+和Fe 3+以及低浓度HF的混合物。 在离开最终的酸洗槽后，可以对该条进行刷洗或擦洗以松开任何残留的水垢以形成干净的条。

公开(公告)号：EP1501951B1

公开(公告)日：2006-08-30

申请号：EP03750018.8

申请日：2003-02-25

申请人： AK Steel Properties, Inc.

发明人： SCHOEN, Jerry, W. ,  COMSTOCK, Robert, Jr.

IPC分类号： C21D8/12 ,  C22C38/38

CPC分类号： C21D8/1211 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/34 ,  C22C38/40 ,  C22C38/44 ,  C22C38/50 ,  H01F1/14791

摘要： Non-oriented electrical steels are widely used as the magnetic core material in a variety of electrical machinery and devices, particularly in motors where low core loss and high magnetic permeability in all directions of the strip are desired. A method for producing a non-oriented electrical steel with low core loss and high magnetic permeability provides a steel that is produced from a steel melt which is cast as a thin strip or sheet, cooled, hot rolled and/or cold rolled into a finished strip. The finished strip is further subjected to at least one annealing treatment wherein the magnetic properties are developed, making the steel strip suitable for use in electrical machinery such as motors or transformers.