Baoshan Iron & Steel Co., Ltd.

Jianjun Zhi

Zhengjie Fan

Jian Long Yang

Kai Zhu

Jianhua Zhu

Ruizhi Wang

Li Ping Wang

Li Wang

Xufeng Liu

Wei Xiong

Yong Zhong

Guangkui Hu

Jianguo Shen

Weijun Feng

Guoqiang Liu

Hua Gao

Jian Yang

Hongguang Zheng

Yiyu Zheng

Zhiqiang Zhang

A tundish, wherein a steel passing hole () is provided at a lower portion of a gas-curtain weir refractory body (); an argon duct (), a gas chamber () and a gas-permeable brick () are connected to form a gas-curtain generating device, and the gas-curtain generating device is installed at the lower portion of the gas-curtain weir refractory body (); the gas-permeable brick () is provided in association with the position of the steel passing hole (), and a length of the gas-permeable brick is designed larger than a width of the steel passing hole (); and a gas-curtain weir plate () is provided in a tundish container, the gas-curtain weir refractory body () crosses the tundish container horizontally, and divides the tundish container into a first region and a second region.

Tundish

Disclosed is a flow-controllable tundish structure capable of filtering inclusions in molten steel. The tundish structure comprises a tundish (), the tundish being divided into three separated cavities which comprise an impact zone cavity () in the middle and pouring zone cavities () at two sides thereof. A long nozzle () for pouring is vertically arranged in the center of the impact zone cavity, and molten steel flows down out of the long nozzle for pouring and is injected into the impact zone cavity; and a turbulence suppressor () directly facing the long nozzle for pouring is arranged on the cavity bottom under the long nozzle for pouring, and the molten steel flowing down out of the long nozzle for pouring impacts on the turbulence suppressor and is then buffered and mixed. Filter assemblies (A) are respectively arranged between the impact zone cavity and the pouring zone cavities at the two sides, and the buffered and mixed molten steel in the impact zone cavity is filtered by the filter assemblies and is then delivered into the pouring zone cavities at the two sides. Discharge ports () are respectively arranged in the bottom of the pouring zone cavities, and the molten steel filtered by the filter assemblies flows into the pouring zone cavities and then flows out from the discharge ports. The flow-controllable tundish structure has the advantages of a simple structure, easy building and lower cost, and has a good liquid steel purification effect.

Flow-controllable tundish structure capable of filtering inclusions in molten steel

A high-formability and super-strength cold-rolled steel sheet and a manufacturing method thereof. The weight percentage of its components is: C 0.15-0.25%, Si 1.00-2.00%, Mn 1.50-3.00%, P&#x2264;0.015%, S&#x2264;0.012%, Al 0.03-0.06%, N&#x2264;0.008%, and the rest are Fe and inevitable impurities. The manufacturing method comprises the following steps: 1) smelting and casting; 2) heating to 1170&#x2dc;1230&#xb0; C. and performing thermal insulation; 3) performing hot rolling, the finish rolling temperature being 880&#xb1;30&#xb0; C., and coiling at 550&#x2dc;650&#xb0; C.; and 4) performing acid washing, cold rolling, and annealing, the cold rolling reduction being 40-60%, annealing at 860-920&#xb0; C., and performing slow cooling to 690-750&#xb0; C. with the cooling rate of 3&#x2dc;10&#xb0; C./s; performing rapid cooling at 240&#x2dc;320&#xb0; C., with the cooling speed &#x2265;50&#xb0; C./s, then heating to 360&#x2dc;460&#xb0; C., and performing thermal insulation for 100&#x2dc;500 s to cool to the room temperature at last. Finally, a high-formability, low-rebound property and super-strength cold-rolled steel sheet with the yield strength of 600&#x2dc;900 MPa, the tensile strength of 980&#x2dc;1150 MPa, the elongation of 17&#x2dc;25% is obtained.

High-formability and super-strength cold-rolled steel sheet

A device for continuously measuring the flow rate of steel melt near surface thereof, comprising a flow rate detecting rod () and a deflection means (B) for the flow rate detecting rod, wherein the flow rate detecting rod () comprises a refractory material tube at one end and a stainless steel rod at the other end, and the stainless steel rod is fittedly connected with the refractory material tube. Also provided is a method for continuously measuring the flow rate of steel melt near surface thereof.

Device and method for continuously measuring flow rate near liquid steel surface

A device for measuring the flow rate of steel melt near the surface thereof. The device has a flow rate detecting rod and a deflection device for the flow rate detecting rod. The deflection device for the flow rate detecting rod has a flow rate detecting rod counterweight, a deflection bearing sleeve, a deflection bearing, a deflection angle indicating board, a deflection angle pointer and a flow rate detecting rod fastening bolt.

Device for measuring flow rate of steel melt near a surface of the steel melt

Growing community of inventors

Shanghai, China

Jianjun Zhi