Abstract: The present invention discloses a pipe, wherein the pipe has a corrosion-resistant layer and a base layer in the thickness direction, the corrosion-resistant layer being at least disposed on the inner wall of the pipe, and the corrosion-resistant layer further comprises, in addition to Fe and inevitable impurities, the following chemical elements in percentage by weight: 0<C?0.05%; Si: 0.3-0.6%; Mn: 0.5-2.0%; Ni: 8.00-14.00%; Cr: 16.00-19.00%; Mo: 2.00-3.50%; N: 0.02-0.20%; and Ti: 0.01-0.2%, and Cr, Mo, N, and Ti satisfy the following inequation: Cr+2.8×Mo+16×N+2×Ti?22.0%. Correspondingly, the present invention further discloses a method for manufacturing the above pipe comprising the steps of: (1) preparing a corrosion-resistant layer slab and a base layer slab; (2) assembling the corrosion-resistant layer slab and the base layer slab to obtain a composite slab; (3) heating and rolling: heating the composite slab at a temperature of 1150-1230° C.

Abstract: Disclosed is a blended polyester thin film, comprising a copolyester and a homopolyester. The thin film is composed of upper, middle, and lower layers. Each of the three layers is a homogeneous mixture of the copolyester and the homopolyester. The copolyester comprises 800-2000 ppm by mass of SiO2 added by means of in-situ polymerization. A dihydric alcohol component in the copolyester comprises ethylene glycol, 1,4-cyclohexanedimethanol, and 1,4-butanediol. The melting point of the copolyester is between 200-240° C. The blended polyester film of the present invention has excellent processability, excellent chemical resistance, such as acid and alkali resistance, and excellent uniformity. A film-coated metal plate prepared from the blended polyester thin film can meet performance requirements of metal containers for food and beverage packaging with complex molding processing and high corrosion resistance.

Abstract: A low-carbon, low-alloy and high-formability dual-phase steel having a tensile strength of greater than or equal to 590 MPa, a hot-dip galvanized dual-phase steel, and a manufacturing method therefor by means of rapid heat treatment. The steel comprises the following components, in percentage by mass: 0.04-0.12% of C, 0.1-0.5% of Si, 1.0-2.0% of Mn, P?0.02%, S?0.015%, 0.02-0.06% of Al, and can further comprise one or two of Cr, Mo, Ti, Nb and V, wherein Cr+Mo+Ti+Nb+V?0.5%, and the balance is Fe and other unavoidable impurities. The manufacturing method therefor includes smelting, casting, hot rolling, cold rolling, and rapid heat treatment processes.

Abstract: Disclosed in the present invention are a hot stamped steel plate with Al—Zn—Mg—Si plating and a hot stamping method therefor; before hot stamping, the initial structure of the Al—Zn—Mg—Si plating is composed of a Zn-rich phase, an Al-rich phase, a MgZn2 phase, an MgSi2 phase, and a Fe—Al—Si alloy layer; after hot stamping, when the heat preservation time of the plating structure is t?3 min, the plating is composed of an upper and lower layer, the structure of the first layer being composed of an Al-rich phase, a Zn-rich phase, and an MgZn2 phase, and the volume percentage ratio of the sum of the Zn phase and the MgZn2 phase is between 20% and 80%; the structure of the second layer is composed of an FeAl3 phase and a Zn-rich phase, and the volume percentage ratio of the Zn-rich phase does not exceed 5%; when the heat preservation time is t>3 min, the plating is composed of a single-layer alloy layer, and the alloy layer is mostly composed of a FeAl3 phase, wherein a Zn-rich phase and an MgZn2 phase are pres

Abstract: Disclosed is a tube, having a corrosion resistant layer and a base layer in a thickness direction. The corrosion resistant layer is at least located on the inner wall of the tube. In addition to Fe and inevitable impurities, the corrosion resistant layer further contains the following chemical elements in wt %: 0<C?0.08%; 0<Si?0.75%; 0<Mn?2.0%; Ni: 10.00-14.00%; Cr: 16.00-18.00%; Mo: 2.00-3.00%; and N: 0.02-0.20%, with Cr, Mo and N satisfying the inequation: Cr+3.3×Mo+16×N?25%. Correspondingly, further disclosed is a method for manufacturing the tube, including the steps: (1) preparing a corrosion resistant layer slab and a base layer slab; (2) assembling the corrosion resistant layer slab and the base layer slab to obtain a clad slab; (3) heating and rolling: heating the clad slab at a temperature of 1100 to 1200° C., and then performing multi-pass rolling, with the total reduction rate being not less than 90%, and the final rolling being performed at a temperature of not less than 900° C.

Abstract: Disclosed is a high-yield-ratio cold-rolled dual-phase steel, having the following chemical elements in percentage by mass: 0.05%-0.08% of C, 0.9%-1.2% of Mn, 0.1%-0.6% of Si, 0.030%-0.060% of Nb, 0.030%-0.060% of Ti, 0.015%-0.045% of Al, and the balance being Fe and other inevitable impurities. A manufacturing method for the high-yield-ratio cold-rolled dual-phase steel, comprising: (1) smelting and casting; (2) hot rolling, wherein a casting blank is controlled and soaked at a temperature of 1200° C.-1250° C.; rolled with the finish rolling temperature being 840° C.-930° C.; cooled at a speed of 20° C./s-70° C./s, and then wound at the winding temperature being 570° C.-630° C.; (3) cold rolling; (4) annealing at the soaking temperature being 750° C.-790° C. for 40 s-200 s, cooling at a speed of 30° C./s-80° C./s, the start temperature of cooling is 650° C. to 730° C., the aging temperature is 200° C. to 260° C., and the overaging time is 100 s to 400 s; and (5) leveling.

Abstract: The present invention provides magnesium or magnesium alloys having high formability at room temperature, the magnesium or magnesium alloys having a grain size ?2 microns. The present invention also provides a method for manufacturing the magnesium or magnesium alloys having high formability at room temperature. The magnesium or magnesium alloys having high formability at room temperature are prepared by simple processing means. The present invention overcomes a problem of poor formability at room temperature.

Abstract: Disclosed is a bainite steel comprising the following chemical components in percentages by mass: 0.10-0.19% of C, 0.05-0.45% of Si, 1.5-2.2% of Mn, 0.001-0.0035% of B, 0.01-0.05% of Al, 0.05-0.40% of Cr, 0.05-0.40% of Mo, and more than or equal to 90% of Fe. By rationally controlling the contents of C, Si, Mn, B, Al, Cr, Mo, and the other elements in the steel, the steel can spontaneously form a phase having a structural gradient during the preparation process. In addition, the hardenability of the steel is also improved, such that the strength and forming performance of the bainite steel can be improved. Further disclosed in the present invention is a method for preparing the bainite steel.

Abstract: Disclosed in the present invention is high-strength and high-hardness reinforced wear-resistant steel, comprising Fe and inevitable impurities, and further comprising the following chemical elements in percentage by mass: C: 0.22-0.33%; Si: 0.10-1.00%; Mn: 0.50-1.80%; Cr: 0.80-2.30%; Al: 0.010-0.10%; RE: 0.01-0.10%; W: 0.01-1.0%; and at least one of MO: 0.01-0.80%, Ni: 0.01-1.00%, Nb: 0.005-0.080%, V: 0.01-0.20%, and Ti: 0.001-0.50%. In addition, further disclosed in the preset invention is a manufacturing method for the high-strength and high-hardness reinforced wear-resistant steel, comprising the steps of: (1) smelting and casting; (2) heating; (3) rolling; and (4) on-line quenching: wherein the cooling start temperature of primary cooling is (Ar3?+5)-(Ar3?+50)° C., M90<final cooling temperature<Bs, and the cooling speed is 2-15° C./s; and then performing air-cooling to room temperature.

Abstract: The present disclosure relates to an insulating coating, which comprises the following components: a water-soluble metal inorganic salt A containing a water-soluble phosphate A1, which comprises a water-soluble phosphate of at least one of aluminum, zinc, magnesium and manganese; a water dispersible organic emulsion B, which comprises at least one of an epoxy emulsion and a curing agent thereof, polyester, polyurethane, polyacrylate and an ethylene-vinyl acetate copolymer; an additive C, which comprises at least one of a structure reinforcing additive C1 and a heat-resistance reinforcing additive C2, wherein the structure reinforcing additive C1 comprises an inorganic nanoparticulate matter, and the heat-resistance reinforcing additive C2 is selected from at least one of boric acid and a water-soluble salt of molybdenum, tungsten, vanadium or titanium; an auxiliary agent D1 and a solvent D2, wherein the solid content ratio of the water-soluble metal inorganic salt A to the water dispersible organic emulsion B

Abstract: Disclosed is a hot-rolled steel for enameling having an enameling and firing strengthening property, comprising, in addition to Fe and inevitable impurities, the following chemical elements in mass percent: C: 0.03-0.07%, Si?0.05%, Mn: 1.5-2.5%, Al: 0.01-0.05%, Cr: 0.25-0.65%, Cu: 0.02-0.20%, Ti: 0.01-0.08%, V: 0.01-0.10%, and Mo: 0.01-0.10%. Accordingly, further disclosed is a manufacturing method for the hot-rolled steel for enameling, comprising the steps of: (1) smelting and casting; (2) heating; (3) hot rolling, the temperature of rough rolling being controlled to be greater than 850° C., the start temperature of finish rolling being controlled to be 900-1050° C., and the final temperature of finish rolling being controlled to be 840-900° C.; (4) laminar cooling, the cooling speed being controlled to be 10-35° C./s; and (5) coiling.

Abstract: A blended polyester laminating film resistant to discoloration caused by cooking, comprising polyethylene terephthalate and polybutylene terephthalate. The blended polyester laminating film comprises three layers, i.e., upper, middle, and lower layers. One surface layer contains SiO2 in a mass fraction of 1200-2000 ppm added by in-situ polymerization. The blended polyester laminating film is manufactured by a three-layer coextrusion biaxial stretching method, and the manufacturing method is 240-275° C. A film-laminated metal sheet manufactured from the blended polyester laminating film has excellent resistance to discoloration caused by cooking, and is applied to metal containers for food and beverage packaging that require high-temperature sterilization.

Abstract: A high-performance thermoformed component provided with a coating, and a manufacturing method therefor. The thermoformed component comprises a substrate and a coating thereon. The substrate comprises the following ingredients in percentage by weight: 0.01-0.8% of C, 0.05-1.0% of Si, 0.1-5% of Mn, 0.001-0.3% of P, 0.001-0.1% of S, 0.001-0.3% of Al, 0.001-0.5% of Ti, 0.0005-0.1% of B, 0.001-0.5% of Nb, 0.001-0.5% of V, and the remainder being Fe and other unavoidable impurities. The appearance of the thermoformed component has no color difference and no mottling. The surface oxygen content of the thermoformed component is 0.1-20 wt. %, and the ratio of the standard deviation to the average value of the surface oxygen content satisfies: 0<standard deviation of oxygen content/average value of oxygen content ?0.3. In the manufacturing method, a coated steel plate that has undergone heat treatment, transfer processing, and hot stamping is not treated with oil.

Abstract: Provided is a vacuum coating device, comprising a crucible (13), an induction heater (15) arranged on the outer side of the crucible (13); a flow distribution box connected to the top of the crucible (13) through a steam pipeline (16); a pressure regulating valve (18) and a diverter valve (19) sequentially arranged in a direction in which the steam pipeline (16) is in communication with the flow distribution box; a horizontal pressure stabilizing plate (20) arranged in the flow distribution box, a plurality of sub-nozzles (21) connected to the top of the flow distribution box; wherein a plurality of air flow distribution chambers are arranged in the diverter valve (19); a ratio of a total area of the air flow distribution chambers (Sdistribution) to an area of the steam pipeline (16) in the radial direction (Spipeline) is greater than or equal to 0.1, i.e.: Sdiversion/Spipeline?0.1.

Abstract: A method for producing ultra-thin hot-rolled strip steel, the method comprising the following process steps: A. a smelting process: feeding scrap steel into an induction electric furnace (1) for smelting so that the scrap steel melts into molten steel; B. a refining process: using a ladle refining furnace (2) and a ladle vacuum degassing furnace (3) to refine the molten steel; C. a continuous casting process: casting the refined molten steel into a cast strip blank that has a thickness of 1.6-2.5 mm by means of a dual-roller thin strip continuous casting system (4); D. a hot rolling process: directly feeding the cast strip blank that was cast in the continuous casting process to a single-stand hot rolling mill (9) for rolling to produce hot-rolled strip steel, the thickness of the hot-rolled strip steel being 0.8-1.5 mm; E. a cooling coiling process: performing atomizing cooling on the hot-rolled strip steel, and coiling after the strip steel temperature is controlled to be 400-750° C.

Abstract: Disclosed are a steel for a high-temperature carburized gear shaft and a manufacturing method for the steel. The steel for the high-temperature carburized gear shaft comprises the following chemical components in percentage by mass: 0.17-0.22% of C, 0.05-0.35% of Si, 0.80-1.40% of Mn, 0.010-0.035% of S, 0.80-1.40% of Cr, 0.020-0.046% of Al, 0.006-0.020% of N, 0.002-0.030% of Nb, V?0.02%, and Ti?0.01%. Also disclosed is a manufacturing method for the steel for the high-temperature carburized gear shaft, comprising the steps of: smelting and casting; heating; forging or rolling; and finishing. By reasonably controlling chemical element compositions of the steel, the steel for the gear shaft in the present invention can maintain proper austenite grain size and stability at high temperature, maintains 5-8 grades of the austenite grain size before and after the high-temperature vacuum carburizing at 940-1050° C.

Abstract: Provided are a gradient steel material having a surface layer with ferrite and an inner layer with ferrite+pearlite, and a manufacturing method, the weight percentages of the components are: C?0.15%, Si?1%, Mn?1.5%, the balance of Fe and inevitable impurities, and the surface layer of the steel material is ferrite, the inner layer is ferrite+pearlite. The manufacturing method thereof includes: smelting, casting, rolling, heat treatment; wherein, in the heat treatment step, the steel material is heated above the austenitizing temperature Ac3, and hold at the temperature more than 3 min to ensure that the material is completely austenitized; subsequently, it is cooled to a temperature below Ar1 at a cooling rate lower than 0.5° C./s. The present steel material does not need to be obtained by means of the compound preparation of different materials, and is only processed and prepared by a single material, the process is short, the procedure is simple, and the cost is low.

Abstract: A fabrication method for a steel thin-walled tailor-welded part and a hot-stamped part prepared by using the tailored welded part, the method comprising: using steel plates (10, 10, 20) to be welded which have an aluminum or aluminum alloy coating (12, 12?, 22, 22?) is used; by means of adjusting the composition of a shielding gas (50) and the composition of a welding wire (30) during a welding process, in combination with the control of the welding speed and wire-feeding speed, controlling the content of free aluminum in a weld seam to be 0.1 to 4.0 wt. %, which prevents the production of iron-aluminum intermetallic compounds in the weld seam during a tailor welding process while ensuring that an appropriate amount of ferrite which is distributed in a dispersed manner is produced in the weld seam. The weld seam structure of the obtained tailor-welded part is +1 to 15 vol. % martensite, +0 to 5 vol. % ferrite which is distributed in a dispersed manner, and the remainder is austenite.

Abstract: Provided is a replacement system for a metallurgical temperature measuring and sampling probe (200).

Abstract: A cold-rolled annealed dual-phase steel is provided, having a microstructure of ferrite and martensite, and comprising the following chemical elements in mass percentage: 0.08% to 0.1% of C, 1.95% to 2.2% of Mn, 0.1% to 0.6% of Si, 0.020% to 0.050% of Nb, 0.020% to 0.050% of Ti, 0.015% to 0.045% of Als, 0.40% to 0.60% of Cr, 0.2% to 0.4% of Mo, 0.001% to 0.005% of Ca, and the balance being Fe and other inevitable impurities. A method for manufacturing the cold-rolled annealed dual-phase steel is also provided, comprising the steps of: (1) smelting and casting; (2) hot rolling; (3) cold rolling; (4) annealing; and (5) temper rolling.