Abstract: An unoriented silicon steel having high magnetic conductivity and low iron loss at a working magnetic density of 1.0-1.5 T and method for manufacturing same. By proper deoxidation control in a RH refining and high-temperature treatment for a short time in a normalizing step, the method can reduce the amount of inclusions in the silicon steel and improve grain shape, so as to improve the magnetic conductivity and iron loss of the unoriented silicon steel at a magnetic density of 1.0-1.5 T.

Abstract: A high-toughness hot-rolled high-strength steel with a yield strength of Grade 800 MPa with its chemical components, in weight percentages, being C 0.02-0.05%, Si?0.5%, Mn 1.5-2.5%, P?0.015%, S?0.005%, Al 0.02-0.10%, N?0.006%, Nb 0.01-0.05%, Ti 0.01-0.03%, 0.03%?Nb+Ti?0.06%, Cr 0.1%-0.5%, Mo 0.1-0.5%, B 0.0005-0.0025%, and the balance of Fe and unavoidable impurities, and a preparation method thereof. The present invention acquires, via direct quenching, an ultra-low carbon martensite structure with a yield strength of 800 Mpa and an impact energy of more than 100J under a temperature of ?80° C.

Abstract: A control method and apparatus for continuous casting steel pouring are provided, wherein the amount of the molten steel flow of the ladle is controlled, thereby improving the yield of the molten steel and decreasing the production cost.

Abstract: A 980 MPa-grade hot-rolled dual-phase steel and a manufacturing method therefor. The chemical components of the steel comprise, in percentage by weight, 0.10%-0.20% of C, 0.8%-2.0% of Si, 1.0%-2.0% of Mn, 0-0.02% of P, 0-0.005% of S, 0-0.003% of O, 0.02%-0.06% of Al, 0-0.006% of N, 0.01%-0.06% of Nb, 0.01%-0.05% of Ti, and the balance of Fe and inevitable impurities. In addition, the components need to meet the following relation: 0.05%?Nb+Ti?0.10. The microstructure of the steel is made of ferrite and martensite. The average grain size of the ferrite is 5-10 ?m, and the equivalent grain size of the martensite is 15-20 ?m.

Abstract: A method for producing a film-coated metal plate, comprising the steps of: (1) pre-heating and soaking a metal plate; (2) hot coating the metal plate with a thin film; (3) cooling the metal plate; (4) compressing the metal plate to dry it; (5) reheating and post-processing the metal plate. This method is able to produce a metal plate having a thin film coated on the surface thereof and to easily control the thickness of a melting layer of the thin film in the process of production, especially control the difference between the thicknesses of the melting layers on both sides; and meanwhile, this method is able to increase the cooling rate. Accordingly, this method enhances the performance of the film-coated metal plate and increases the application range of the film-coated metal plate by means of a more environmentally friendly producing process and lower energy consumption, and is able to produce good economic and social benefits.

Abstract: A roller treatment process and a treatment device suitable for a total-amount steel slag treatment. The treatment process is: firstly, a slag tank (2) with the molten slag is tightly held by a slag tank tilting mechanism and moved to a slag inlet position, the slag tank (2) is tilted to pour the molten slag with good fluidity into a rotary roller device (5) through a feeding chute (51), so that a roller treatment is achieved; secondly, when the steel slag (3) without fluidity in the slag tank (2) cannot flow out, a slag removal machine (4) is used for pushing the high-viscosity slag or the solid slag into the roller device (5); and thirdly, the slag tank (2) is reversed by a large angle tilting to make the slag at the bottom of the tank drop into the roller device (5), so that the total-amount steel slag treatment of the same roller device (5) is achieved.

Abstract: A 980 MPa-grade hot-rolled ferrite bainite dual-phase steel and a manufacturing method therefor. The chemical components of the steel comprise, in percentage by weight, 0.15-0.30% of C, 0.8-2.0% of Si, 1.0-2.0% of Mn, 0-0.02% of P, 0-0.005% of S, 0-0.003% of O, 0.5-1.0% of Al, 0-0.006% of N, 0.01-0.06% of Nb, 0.01-0.05% of Ti, and the balance of Fe and inevitable impurities. In addition, the chemical components meet the following relations: 0.05%?Nb+Ti?0.10%, and 2.5?Al/C?5.0. The microstructure of the steel is made of ferrite and bainite. The average grain size of the ferrite is 5-10 ?m, and the equivalent grain size of the bainite is less than or equal to 20 ?m. The yield strength of the steel is greater than or equal to 600 MPa, the tensile strength of the steel is greater than or equal to 980 Mpa, and the ductility is greater than or equal to 15%.

Abstract: A cold-rolled high-strength steel plate having excellent phosphating performance and formability and a manufacturing method therefor. The chemical composition of the steel plate is, in percentage by weight, C 0.01-0.20%, Si 1.50-2.50%, Mn 1.50-2.50%, P?0.02%, S?0.02%, Al 0.03-0.06%, N?0.01%, the remainder being Fe and impurities. The surface layer of the steel plate has an inner oxide layer with a thickness of 1-5 ?m, and there is no enrichment of Si and Mn on the surface of the steel plate. The steel plate has good phosphating performance and formability, with a tensile strength of ?980 MPa and an elongation of ?20%. The structure at the room temperature contains retained austenite, ferrite, and martensite and/or bainite.

Abstract: A cold-rolled steel plate (1) and a manufacturing method therefor. The chemical composition of the steel plate (1) in percentage by weight is: C 0.15-0.25%, Si 1.50-2.50%, Mn 2.00-3.00%, P?0.02%, S?0.01%, Al 0.03-0.06%, N?0.01%, with the balance being Fe and impurities. The surface layer has an inner oxide layer (2) with a thickness of 1-5 ?m, and there is no enrichment of Si or Mn on the surface. The steel plate (1) has good phosphating performance and formability, with a tensile strength of ?1180 MPa and an elongation of ?14%, and has a complex-phase structure of ferrite, martensite, and retained austenite, the content of the retained austenite being not lower than 5%. A dew point is at ?25° C. to 10° C. in continuous annealing, such that external oxidation transitions to internal oxidation.

Abstract: A method for manufacturing a superior 13Cr thickened drillrod comprises the following steps: firstly, thickening the ends of a steel tube with a composition so as to obtain a drillrod with thickened ends, the composition in percentage by weight being: C: 0.01-0.05%, Si?0.5%, Mn: 0.2-1.0%, Cr: 12-14%, Mo: 1-3%, Ni: 4-6%, and a balance of Fe and inevitable impurities; after heating the tube as a whole to 950-1000° C., air cooling same and tempering same at 600-650° C.; and machining the two thickened ends respectively into an externally threaded drillrod coupler and an internally threaded drillrod coupler; wherein the tube end thickening is an external thickening, including three rounds of heating and three rounds of thickening, with at least one pass of deformation for each round, and the heating temperature being 1150-1200° C.

Abstract: The invention relates to an inorganic aqueous surface treatment agent for a single-face electrogalvanized, chromium free surface treated steel plate, a single-face electrogalvanized, chromium-free surface treated steel plate used for fuel tanks and a process of making the same.

Abstract: There is disclosed a lightweight steel with an enhanced elastic modulus, wherein the lightweight steel has a chemical composition by mass percentage of 0.001%?C?0.30%, 0.05%?Mn?4.0%, 1.5%<Al<3.0%, 1.5%?Ti?7.0%, 0.5%?B?3.6%, and the remainder consisting of Fe and other unavoidable impurities. A microstructure of the lightweight steel comprises a matrix and fine hardening granules evenly distributed throughout the matrix. The matrix entirely or partially comprises a ferrite and/or a bainite. The hardening granule comprises at least TiB2.

Abstract: 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?0.015%, S?0.012%, Al 0.03-0.06%, N?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˜1230° C. and performing thermal insulation; 3) performing hot rolling, the finish rolling temperature being 880±30° C., and coiling at 550˜650° C.; and 4) performing acid washing, cold rolling, and annealing, the cold rolling reduction being 40-60%, annealing at 860-920° C., and performing slow cooling to 690-750° C. with the cooling rate of 3˜10° C./s; performing rapid cooling at 240˜320° C., with the cooling speed ?50° C./s, then heating to 360˜460° C., and performing thermal insulation for 100˜500 s to cool to the room temperature at last.

Abstract: Molybdenum sulphide containing catalysts are provided which have been produced using a microemulsion approach. The catalysts thereby produced have a unique morphology which directly translates into improved performance in the conversion of syngas to alcohol and in the selectivity of this reaction towards producing ethanol.

Abstract: A high-magnetic-induction low-iron-loss non-oriented silicon steel sheet and a manufacturing method therefor. The chemical composition by mass percentages is: C?0.005%, Si: 0.1%˜1.6%, Mn: 0.1%˜0.5%, P?0.2%, S?0.004%, Al?0.003%, N?0.005%, Nb?0.004%, V?0.004% and Ti?0.003%, with the balance being Fe and inevitable impurities; and at the same time satisfies: 120?[Mn]/[S]?160, and [Nb]/93+[V]/51+[Ti]/48+[Al]/27?[C]/12+[N]/14. After casting, the cooling rate in a cool-down process of casting slab is controlled, and a temperature controlling method is used to adjust the charging temperature of casting slab.

Abstract: There is disclosed in the disclosure a protective clad steel plate, comprising hard steel layers (1, 3, 5) and soft steel layers (2, 4) arranged alternately, wherein face layers of the protective clad steel plate are hard steel layers (1, 3, 5), wherein the hard steel layers (1, 3, 5) and soft steel layers (2, 4) are atomically bonded by rolling cladding; wherein the soft steel layers (2, 4) comprise chemical elements in percentage by mass of: C: 0.001-0.01%, 0<Si?0.005%, Mn: 0.05-0.15%, 0<Al?0.005%, Ti: 0.01-0.10%, with a balance of Fe and unavoidable impurities.

Abstract: There is disclosed in the disclosure a protective steel plate with excellent cold roll formability, comprising: three soft steel layers (1, 4, 5) and two hard steel layers (2, 3), wherein the three soft steel layers (1, 4, 5) and the two hard steel layers (2, 3) are positioned alternately, and face layers of the protective steel plate are soft steel layers (1, 4, 5), wherein the hard steel layers (2, 3) and the soft steel layers (1, 4, 5) are atomically bonded by rolling cladding; wherein the soft steel layers (1, 4, 5) comprise chemical elements in percentage by mass of: C: 0.001-0.01%, 0<Si?0.005%, Mn: 0.05-0.15%, 0<Al?0.005%, Ti: 0.01-0.10%, with a balance of Fe and other unavoidable impurities.

Abstract: The present invention discloses an acid concentration control method and device for cold rolling pickling production line. In the method, the acid circulating tank of the pickling production line are provided with three acid-filling tanks. And the three acid-filling tanks are interconnected with each other. An acid concentration measuring device is concatenated on the acid solution back-flow pipeline of each acid-filling tank and acid tank, through which the actual acid concentration of the acid solution in the acid tank of the production line may be measured. The measured acid concentration, after being analyzed by the analyzer, will be transmitted to the multi-variable controller where it is compared to the specified acid concentration as per process requirements. The difference between the measured acid concentration and the specified acid concentration will be used as the input value for the model of the multi-variable controller.

Abstract: The invention relates to high magnetic induction oriented silicon steel and a preparation method thereof. The oriented silicon steel comprises the following chemical elements by weight percent: 0.035-0.120% of C, 2.9-4.5% of Si, 0.05-0.20% of Mn, 0.005-0.050% of P, 0.005-0.012% of S, 0.015-0.035% of Als, 0.001-0.010% of N, 0.05-0.30% of Cr, 0.005-0.090% of Sn, not more than 0.0100% of V, not more than 0.0100% of Ti, at least one of trace elements of Sb, Bi, Nb and Mo, and the balance of Fe and other inevitable impurities, wherein Sb+Bi+Nb+Mo is 0.0015-0.0250% and (Sb/121.8+Bi/209.0+Nb/92.9+Mo/95.9)/(Ti/47.9+V/50.9) ranges from 0.1 to 15.

Abstract: The invention discloses a drill pipe having ultra-high toughness and high strength and comprising the following chemical elements in mass percentage: C: 0.24-0.30%, Si: 0.1-0.5%, Mn: 0.7-1.5%, Cr: 0.7-1.5%, Mo: 0.5-0.75%, V: 0.01-0.10%, Nb: 0.01-0.05%, P?0.015%, S?0.005%, and the balance of Fe and unavoidable impurities; and a process of manufacturing the drill pipe having ultra-high toughness and high strength, comprising: heating the drill pipe as a whole to 900-950° C.; subjecting the inner surface of the drill pipe to axial-flow water-spray cooling and the outer surface of the drill pipe to laminar-flow water-spray cooling while controlling the amount of the water sprayed at thickened ends of the drill pipe and that along the pipe body to be different from each other; and controlling the tempering temperature to be 650-675° C. The inventive drill pipe having ultra-high toughness and high strength has a longitudinal full-size impact toughness at ?20° C. of at least 100 J and has a strength of 135 ksi.