Baoshan Iron & Steel Co., Ltd.

Shanqing Li

Kangjian Wang

Peilei Qu

Fei Xiong

Jizhe Quan

Zhenglian Jiang

Jianghua Xu

Xiaoming Chen

Tao Zheng

Mingnan Duan

Sanbing Ren

Junfei Fan

Chunwei Zhang

Hui Wang

Xin Wang

Yong Qing Lu

Lei Yu

Jun Shen

Xinyan Jin

Yong Lu

Hao Xu

Bing Yang

Yueming Zhou

Xiaoli Jin

Yingjie Wang

Peijie Huang

Hongmei Li

Xiaoguang Hou

Hongwei Qian

Cunbing Wang

Tingquan Gu

Yiru Wang

Kaifu Yang

The present invention discloses a vacuum coating device, comprising: a crucible; an induction heater provided on the periphery of the crucible; a flow distribution box connected to the top of said crucible via a steam pipe. Wherein said flow distribution box is provided inside with a horizontal pressure stabilizing plate, said flow distribution box is connected on the top with a nozzle, said steam pipe is provided with a pressure regulating valve, and said pressure stabilizing plate has a multi-hole structure. The lower surface of said pressure stabilizing plate is connected to a horizontal flow suppression plate, and a space is formed between the side of said flow suppression plate and the inner wall of said flow distribution box. A jet moderating zone is formed between the joint where said flow distribution box and said steam pipe are connected and the lower surface of said pressure stabilizing plate, and a jet accelerating zone is formed between the upper surface of said pressure stabilizing plate and the joint where said flow distribution box and said nozzle are connected. When the high-temperature steam reaches the low-temperature steel plate, a uniform coating can be formed on the steel plate surface.

Vacuum coating device

Provided is a vacuum coating device, comprising a crucible (), an induction heater () arranged on the outer side of the crucible (); a flow distribution box connected to the top of the crucible () through a steam pipeline (); a pressure regulating valve () and a diverter valve () sequentially arranged in a direction in which the steam pipeline () is in communication with the flow distribution box; a horizontal pressure stabilizing plate () arranged in the flow distribution box, a plurality of sub-nozzles () connected to the top of the flow distribution box; wherein a plurality of air flow distribution chambers are arranged in the diverter valve (); a ratio of a total area of the air flow distribution chambers (S) to an area of the steam pipeline () in the radial direction (S) is greater than or equal to 0.1, i.e.: S/S≥0.1. According to the device, a uniform spray flow can be formed, a uniform coating () is formed on the surface of a steel plate () when high temperature steam is in contact with a low temperature steel plate, the spray flow formed by the sub-nozzles () arranged at the rear portion continuously covers the deposited metal layer that has been formed, so as to achieve efficient coating of strip steel under vacuum conditions.

Disclosed is a method of emulsion concentration optimization for a cold continuous rolling mill set for achieving vibration suppression, the method comprising: defining the process parameters involved in the process of emulsion concentration optimization; setting an initial set value of an emulsion concentration comprehensive optimization target function for a cold continuous rolling mill set for achieving vibration suppression; calculating a bite angle of each stand; calculating a vibration determination index reference value of each stand; setting the emulsion concentration of each stand; calculating the outlet temperature of a strip steel of each stand; calculating the dynamic viscosity of an emulsion in a roll gap of each stand; calculating the oil film thickness in the roll gap of each stand; calculating the emulsion concentration comprehensive optimization target function; determining whether the inequation F(X)&#x3c;Fis established; determining whether the concentration of the emulsion exceeds a feasible region range, and outputting the optimal emulsion concentration set value.

Method of emulsion concentration optimization for cold continuous rolling mill set

A metal sheet having a low friction coefficient and a low waviness. Multiple round or roughly-round small pits are distributed on the surface of the metal sheet. The diameter of a single pit ranges from 30 &#x3bc;m to 150 &#x3bc;m, and the overlap between adjacent pits is lower than 10%. On the surface of the metal sheet where the pits are located, the proportion of the area of pits per square millimeter of surface area is greater than 30%, and the difference between the quantities of pits in any unit square millimeter is less than 20%. By means of the proper design of surface microstructure, the friction coefficient and the waviness can be effectively reduced, thereby improving the forming and painting performance of the material.

Metal sheet having low friction coefficient and low waviness

Disclosed are a method and a device for controlling flow of liquid zinc () in a zinc pot () for hot-dip galvanization. Under the blowing effects of an air knife above the zinc pot () for hot-dip galvanization onto strip steel (), the liquid zinc () diffuses and flows outwards to zones (zones I, II, III and IV) comprising the left side, the right side, the front end of the zinc pot, respectively, and a zone between the strip steel () and a furnace snout (), and surface dross rapidly generated on the surface of the liquid zinc () is driven to flow outwards to the zones (zones I, II, III and IV). On edge sides of the zones (zones I, II, III and IV), travelling magnetic field generators () are arranged in multiple sections above the surface of the liquid zinc () in the zinc pot (), so as to excite a travelling magnetic field to generate an electromagnetic driving force on the liquid zinc () to drive the flow of the liquid zinc (). The flow of the liquid zinc () caused by the travelling magnetic field generators () is engaged with the blowing flow of the air knife, driving the surface liquid zinc () in the zinc pot () to flow in order towards a rear end (zone V) of the zinc pot (). The surface dross floating on the surface of the liquid zinc () is driven by the flowing liquid zinc () to flow in a controlled direction.

Method and device for controlling flow of liquid zinc in zinc pot for hot-dip galvanization

The application discloses a tension system optimization method for suppressing vibration of a cold tandem rolling mill. The method aims to suppress vibration occurring in a high-speed rolling process of a cold tandem rolling mill, and provides a rolling machine vibration determination index coefficient for effectively determining whether vibration occurs in a rolling machine. The method employs a target optimization function F(X) such that a mean square error between an optimal value &#x3c8;of the rolling machine vibration determination index and a vibration determination index &#x3c8;of each machine frame acquired in an actual rolling process is at a minimum, and such that a maximum value of the rolling machine vibration determination index coefficient of each individual machine frame is also at a minimum, employs a constraint in which an upper threshold &#x3c8;of the vibration determination index is acquired during a rolling process in an over-lubricated state in which a neutral angle &#x3b3;coincides with a bite angle &#x3b1;and a constraint in which a lower threshold &#x3c8;of the vibration determination index is acquired during a rolling process in an under-lubricated state in which the neutral angle &#x3b3;is half the bite angle &#x3b1;, thereby ultimately optimizing a tension system of a rolling process of a cold tandem rolling mill.

Tension system optimization method for suppressing vibration of cold tandem rolling mill

Disclosed is a rolling method for a board having various longitudinal thicknesses, comprising the following steps: 1) setting a number N of uniform-thickness segments of a sample, thicknesses h, h, . . . , hof the uniform-thickness segments, lengths L, L, . . . , Lof the uniform-thickness segments, and lengths T, T, . . . , Tof transitional segments between the uniform-thickness segments, the N uniform-thickness segments having N&#x2212;1 transitional segments therebetween, and both the thickness and length having a unit of mm; 2) selecting a raw material; 3) setting a rolling force, a roll gap and a rolling period of time for each segment; 4) preparing rolling; 5) conducting rolling; 6) optimizing rolling parameters, measuring thicknesses and lengths of the uniform-thickness segments and lengths of the transitional segments after the rolling member is rolled; comparing the measured thicknesses of the uniform-thickness segments with the set thicknesses for the sample, so as to correct the rolling force Pand roll gap Gset for each segment in step 3); comparing the measured lengths with the positions marked in step 4), so as to correct the rolling period of time set for each segment in step 3); repeating steps 4) and 5) using raw materials of the same size, and making correction again, wherein a rolled member meeting the requirements of the sample can be made after 2-3 times of trial rolling. This method avoids preparation of a raw material in the form of a roll, avoids study on a complex controlling method for various-thickness rolling of the roll, and saves the raw material and test time.

Rolling method for boards with different longitudinal thicknesses

A method for arranging jet cleaning nozzles comprising: arranging multiple rows of nozzles in a parallel and uniform manner along a lengthwise direction of a metal plate strip; arranging the nozzles in each row at an equal interval; arraying adjacent rows of nozzles in a staggered manner along the widthwise direction of the metal plate strip so as to form a nozzle matrix; wherein each nozzle is perpendicular to a moving direction of the metal plate strip, and the perpendicular distance of each nozzle to a surface of the metal plate strip is the same. Through the method for arranging jet cleaning nozzles, nozzles can be flexibly controlled based on the change of the geometric relationship between nozzles, in order to implement efficient and continuous descaling on the surfaces of a metal plate strip with different width specifications and different requirements on the descaling speed. In this way, waste of energy and water resources occurred when changing specifications is avoided, and the phenomenon that upper and lower nozzles spray to each other is also avoided, thereby achieving flexible and efficient control over the arrangement mode of jet cleaning nozzles for descaling.

Method for arranging jet cleaning nozzles

Disclosed are a system and method for controlling a thickness of a hot-dip galvanized coating on a strip material with a continuously varying thickness. The system of the present disclosure is capable to provide a zinc coating with a uniform thickness on a coiled starting material with a continuously varying thickness, and the method of the present disclosure provides a simplified process to achieve such objective.

Hot-dip galvanized layer thickness control system and method for continuous thickness-varying strip material

The present invention relates to a method of steel sheet surface treatment, wherein, the method comprises sequentially: a strip surface treatment unit () configured with a high pressure spraying device (-) or a centrifugal ejecting device (-), a strip surface rinsing unit (), and a strip surface dry unit (). Either or both of the high pressure spraying devices (-) and the centrifugal ejecting devices (-) are arranged, and spray onto the strip surfaces with a mixture of solid abrasives and water, i.e., slurry. Additionally, the method of steel sheet surface treatment comprises: a slurry supplying unit () and an abrasive recycling unit (). When the method of the present invention is applied into the strip post processing line, it can control the surface roughness of the steel sheet, while clearing away grease, scales and some contaminations thereon, through impacting the mixture of water and solid particles with a certain ratio onto the surfaces of the strip steel. When the method of the present invention is applied into the finishing processing line, it can control the surface roughness of the steel sheet, while adjusting the mechanical properties of the strip, thereby completely or partially replacing the skin pass process.

Method of steel sheet surface treatment and apparatus of the same

The present invention relates to the field of strip cold rolling, and in particular to a thickness control method for strips in a tandem cold mill. Frame Sand one or more additional frames are selected as virtual indirect measuring instruments for the strip performance. A load cell is provided on the frames that are selected as the indirect measuring instruments for the strip performance, and deformation resistance fluctuation of the supplied materials of the frame S is calculated. Finally, the feed-forward adjustment amount of each frame is calculated. The present invention measures the deformation resistance of each section of the strip of the supplied materials through the selected frame, reducing the fluctuation of the thickness of the finished products of the strip and ensuring stable rolling.

Performance feed-forward thickness control method in tandem cold mill

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Shanghai, China

Shanqing Li