Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.
|Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. Patent applications|
|Patent application number||Title||Published|
|20150322553||BAINITIC STEEL RAIL CONTAINING TRACE AMOUNTS OF CARBIDES AND PRODUCING METHOD OF THE SAME - The present invention discloses a bainitic steel rail containing trace amounts of carbides, wherein, the bainitic steel rail mainly consists of bainitic structures, the carbides have a length of 0.05-0.5 μm, the major axis of carbides is oriented to a direction at a 50-70° included angle from the direction of the major axis of bainitic ferrite plates, and the carbides account for 1%-5% by volume. The present invention further discloses a method for producing a bainitic steel rail containing trace amounts of carbides, comprising: cooling a steel rail with residual heat after finish rolling by air cooling, till the temperature at the center of the rail head tread reaches 420-450° C.; cooling the rail head part of the steel rail by accelerated cooling at a 2.0-5.0° C./s cooling rate, till the temperature at the center of the rail head tread reaches 220-240° C.; loading the steel rail into a tempering furnace and tempering at 300-350° C. for 4-6 h; then, cooling the steel rail by air cooling to the room temperature. The steel rail provided in the present invention has outstanding wear resistance and contact fatigue resistance properties, and can meet higher requirement for the service of railroad steel rails, and the product is especially applicable to heavy-duty railroads.||11-12-2015|
|20140182751||HEAT TREATMENT METHOD OF TURNOUT TRACK AND THE TURNOUT TRACK - The present invention provides a heat treatment method of turnout track comprising performing an accelerated cooling on the turnout track to be treated having a railhead tread with a temperature of 650-900° C. so as to obtain the turnout track with full pearlite metallographic structure, wherein the accelerated cooling velocity performed on the working side of railhead of the turnout track is higher than that performed on the non-working side of the railhead of the turnout track. The present invention provides a turnout track obtained with a heat treatment process as depicted therein. The turnout track in present invention has good straightness; both the hardness and tensile strength of the working side of railhead are higher than that of the non-working side of railhead.||07-03-2014|
|20140060710||HEAT TREATMENT METHOD FOR BAINITIC TURNOUT RAIL - The present disclosure discloses a heat treatment method for a bainitic turnout rail, which includes: naturally cooling the turnout rail at a temperature in an austenite region after being finishing rolled to 450-480° C. at a tread center of a rail head of the turnout rail; accelerated cooling the naturally cooled turnout rail to 230-270° C. at the tread center of the rail head, a cooling rate at the tread center and a non-working side of the rail head being 1.5-5.0° C./s, a cooling rate at the working side of the rail head increasing by 0.1-1.0° C./s based on 1.5-5.0° C./s; continuously accelerated cooling the working side, the tread center and the non-working side of the rail head at a cooling rate of 0.05-0.25° C./s to decrease a temperature of the tread center of the rail head to 265-270° C.; and finally, naturally cooling the turnout rail to an ambient temperature.||03-06-2014|
|20130084206||METHOD FOR PRODUCTION OF METALLIC TITANIUM AND METALLIC TITANIUM OBTAINED WITH THE METHOD - A method for production of metallic titanium and metallic titanium obtained with the method are provided. The method for production of metallic titanium comprises: taking a titaniferous material as the anode, a metal material as the cathode, and a molten salt material as the electrolyte, and carrying out electrolysis under electrolytic conditions to obtain metallic titanium; wherein, the titaniferous material is in a porous structure, with 1 mm˜10 mm average pore diameter and 20%˜60% porosity, and at least a part of the titanium element in the titaniferous material exists in the form of TiO||04-04-2013|
|20130078456||METAL PROTECTION COATING, HOT-DIP ZN METALLIC MATERIAL AND HOT-DIP AL-ZN METALLIC MATERIAL USING THE SAME - A metal protective coating is provided, which is obtained by mixing homogeneously a raw mixture, which contains water soluble silicate, promoter, silane coupling agent, silicon oxide packing, water soluble film formation resin, and water; wherein, the promoter is at least one selected from the group consisting of methyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, carboxymethyl-hydroxyethyl cellulose, and their soluble salts; the silane coupling agent contains a first silane derivative shown in formula (1), wherein, R||03-28-2013|
|20120055286||METHOD OF MANUFACTURING DIRECT REDUCTION IRON AND REDUCTION FIRING APPARATUS - The present invention provides a method of manufacturing direct reduction iron and a reduction firing apparatus. The apparatus may be a dual-chamber stepping reduction furnace, a single chamber stepping reduction furnace or a single hearth down-draft reduction furnace, wherein the dual-chamber stepping reduction furnace includes a left chamber, a right chamber, a material containing device, a step mechanism, a slag distributing device, a charging device, heating burners, a fume extraction path, a charging device, a material receiving tank having a sealing cap and a slag discharging path. The method mainly includes the following steps: distributing and charging the slag in the material containing device; carrying and sending the material containing device through a preheating station, a heating station and a reduction station sequentially by the step mechanism; meanwhile, heating the material to be reduced by a combustion of the fuel with the heating burners; discharging the reduced material into the material receiving tank having the sealing cap from the material device; placing the material device from which the material is discharged into the feeding side of the other chamber, then a next work circulation begins. The present invention has features such as a small limitation of resources shortage, low energy consumption, a low-carbon environment, high production efficiency, a low production cost, a high metallization rate, a long life-span of the apparatus and a wide range of production applicability and so on.||03-08-2012|
|20110256420||HOT-DIP GALVANIZED STEEL PLATE AND PRODUCTION METHOD THEREOF - The invention provides a hot-dip galvanized steel plate with high adhesion between a plating layer and base steel, and belongs to the field of manufacturing hot-dip galvanized steel plates. Atomic concentration ratio Al/Zn of Al and Zn in a Fe-Al intermediate transition layer between a base steel and a plating layer of the hot-dip galvanized steel plate is 0.9-1.2. The plating layer did not have Γ phase, but has relatively thin δ phase and little ξ phase. The plating layer mostly consists of η phase, thus obviously improving adhesion, scratch resistance and wear resistance of the plating layer.||10-20-2011|
|20100243468||METHOD FOR PREPARING METALLIC TITANIUM BY ELECTROLYZING MOLTEN SALT WITH TITANIUM CIRCULATION - The present invention provides a method for preparing metallic titanium by electrolyzing molten salt with titanium circulation. The method mainly comprises reducing titanium tetrachloride (TiCl||09-30-2010|
Patent applications by Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.