43results about How to "Less scale" patented technology

The present invention provides a new dispersion stabilizer that satisfies, at a high level, the performances required for a dispersion stabilizer used for suspension polymerization. A method of producing a dispersion stabilizer that is useable for suspension polymerization of a vinyl compound and contains a vinyl alcohol polymer (A) includes producing the vinyl alcohol polymer (A) by heat-treating a vinyl alcohol polymer (B) at a temperature of 90 to 180° C. for 0.5 to 20 hours in an atmosphere in which an oxygen concentration is 8000 ppm or lower. The vinyl alcohol polymer (B) has a saponification degree of at least 60 mol % and contains a residual acetic acid group whose block character is in the range of 0.3 to 0.6.

The invention discloses an optical round wire rod reinforcement bar for producing a prestressed concrete steel rod and a processing method. A steel blank comprises in percentage by weight: 0.25-0.30% of C, 0.90-1.10% of Si, 0.50-0.70% of Mn, 0.015-0.030% of Nb, 0.0020-0.0040% of B, no more than 0.020% of S, no more than 0.020% of P and the balance of Fe and inevitable impurities; the optical round wire rod reinforcement bar with the nominal diameter of 8.0-14.0mm is produced by heating and performing controlled rolling and controlled cooling to the steel blank, and has the following characteristics that the tensile strength (Rm) is 630-660MPa, the percentage reduction of area is more than or equal to 65%, and the ferrite grain size is 10.0-11.5 level. Through integration and creation of converter melting, LF melting, steel blank heading and multiple technology of standard and delay type controlled rolling and controlling cooling and the like, the invention provides a production method of the optical round wire rod reinforcement bar for producing the prestressed concrete steel rod, and the product is high in hardenability, and uniform in microscopic structure. The method has the advantages of excellent quality, low production cost, good processability, strong popularization and the like.

An oil-soluble multifunctional additive for heavy oil or fuel oil contains more surfactants, composite catalytic combustion adjuvant and detergent disperser, and is characterized by saving oil by 10-25%, increasing added water to 10-30% and eliminating black smoke. A process for preparing emulsified heavy oil or fuel oil is also disclosed.

The invention provides a rolling method of a titanium steel composite board. The rolling method comprises the following steps of: 1, selecting the titanium steel composite board provided with a titanium plate as an upper layer and a steel plate as a lower layer; 2, pre-treating a surface; 3, heating and soaking in a heating furnace; and 4, rolling on a hot mill, and removing scale and cooling by utilizing high-pressure water. According to different physical characteristics of the titanium plate and the steel plate under the high-temperature state, through setting the proper heating and soaking processes, and adopting the high pressure water to remove the scale and cool in the rolling process, an oxide skin on the surface of the titanium steel composite board is greatly reduced, and sundries on the surface of the titanium steel composite board are eliminated, meanwhile, the titanium plate and the steel plate are cooled at different water flows, so that the deformation degree of the titanium plate corresponds to the deformation degree of the steel plate, head buckle or unwarp phenomenon of the titanium steel composite board in the rolling process can be effectively prevented, and damage about a roller is greatly reduced; and the titanium steel composite board, rolled by the invention, has the advantages of clean and tidy surface, no foreign matters to press and good plate cut.

A method for producing a motor vehicle component having two regions, with different strength is disclosed. A first one of the two regions has a high strength and a second one of the two regions has a higher ductility and lower strength relative to the first region. In a motor vehicle component produced with the method, the first region has a strength between 1400 and 1600 MPa at a breaking elongation A5>13% and the second region has a tensile strength between 950 and 1050 MPa at a breaking elongation A5>16%.

The invention discloses a heating and rolling method for a wide thick titanium-steel composite plate. The heating and rolling method comprises the heating step and the rolling step. In the heating step, a titanium-steel composite plate blank is heated under the atmosphere of micro positive pressure and weak oxidability; heat preservation is conducted for 1.0-1.5 h at the temperature of 650 DEG C-700 DEG C in the preheating section; then, the temperature is rapidly increased to 880 DEG C-900 DEG C with 1.0-2.0 h in the heating section, and heat preservation is conducted for 1.0-2.0 h; and finally, heat preservation is conducted for 4.0-5.0 h at the temperature of 900 DEG C-930 DEG C in the soaking section. According to the method, in the heating step, heating of the titanium-steel compositeplate is uniform, the phenomena of head tearing, head buckling, upwarping and edge part folding in the titanium-steel composite plate rolling process are eliminated, the rolled plate shape is good, the surface is clean and tidy, edge part folding and foreign matter pressing-in are avoided, the performance is excellent, and the yield and the production efficiency are improved. The titanium-steel composite plate rolled through the method is free of the tearing phenomenon, the performance meets the GB/T8547 requirement, the surface is clean and tidy, edge part folding and foreign matter pressing-in are avoided, and the plate shape is good.

The invention provides a non-oxidation brazing and thermal treatment device of hard alloy cutting teeth, belongs to the technical field of cutting tools, and mainly solves the problems of the prior art of poor welding quality and thermal treatment effect. The non-oxidation brazing and thermal treatment device comprises a cryogenic box, a nitrogen transporting pipeline, a heating furnace, a quenching tank and a manipulator. The non-oxidation brazing and thermal treatment device is characterized in that the nitrogen transporting pipeline is arranged between the cryogenic box and a working bin, one part of the nitrogen transporting pipeline in the working bin is close to the top wall of the working bin, and oxidation discharge holes formed on the nitrogen transporting pipeline. The heating furnace, the quenching tank and the manipulator are located in the working bin of a sealed structure. A heating operation hole, a heating observation hole, a quenching operation hole and a quenching observation hole are formed at the top of the working bin. A waste gas discharge hole is formed on the lower portion of the working bin or on the side wall close to the bottom. A material inlet is formed on the side wall of one side of the working bin close to the heating furnace, a material outlet is arranged on the side wall of one side of the working bin close to the quenching tank, and a movable sealed device is arranged in the material outlet. The non-oxidation brazing and thermal treatment device reduces energy consumption and saves materials.

The invention discloses a forging process of a sliding fork for a locomotive. A. According to the following steps: blanking: design the blanks of two sliding forks so that the two ends of the fork are opposite to form a group of blanks; B. Heating: The assembled rough blanks are heated and kept warm after heating; C. Pre-pressing: the pre-pressed blanks are put into the pre-pressing mold for pre-pressing and forming, and the scale is removed at the same time; D. Final forging: the pre-pressed blanks are put into Final forging in the final forging die; E. Trimming: Use a press to remove the flash from the final forged billet; F. Cutting: Cut the cooled billet from which the flash has been removed, and divide it into two parts to obtain two pieces. locomotive with sliding fork. The invention avoids the artificial billet making process, simplifies the operation process, reduces the working intensity, has a high degree of automation, improves the product quality and stability, and the force of the forging is more balanced during forming. The whole process only needs one heating, and the surface of the blank There is less scale and the surface quality of the product is improved.

The invention relates to a production process for producing copper strips by an upward continuous casting method, which comprises the following steps: adopting copper with a purity of more than or equal to 99.95 percent as a raw material, throwing the raw material into a melting furnace for melting, and obtaining molten copper in the fused state; adding phosphor and rare earth into the molten copper in the fused state according to the proportion of addition of 0.008 to 0.04 kilogram of the phosphor and 0.005 to 0.01 kilogram of the rare earth into each 1,000 kilograms of the molten copper, and uniformly mixing the phosphor and the rare earth in the molten copper; and adopting the upward continuous casting method for casting, and guaranteeing that the temperature of the molten copper is controlled to be between 1,150 and 1,200 DEG C and the liquid level of the molten copper is 50 to 100 millimeters higher than that of a protective sleeve during casting. The production process casts the copper strips with low oxygen content, high resistivity, large density and good quality by adding the phosphor and the rare earth with proper proportion into the molten copper during upward casting.

The invention relates to a method for reforming a heating furnace with targeted heating elements. The method for reforming the heating furnace with the targeted heating elements comprises the steps that (1) the raw material texture of the targeted heating elements to be installed is determined; (2) the installation density and number of the targeted heating elements to be installed are calculatedand determined; (3) targeted heating element matrixes are made on the furnace top and the side wall of a hearth of the heating furnace; (4) the targeted heating elements are installed on the furnace top and the side wall of the hearth, the targeted heating elements are connected with a furnace lining through sintering materials, and mechanical fixation is conducted in the cold state; (5) coating treatment is conducted on the whole inner portion of the hearth with infrared thermal radiation nanometer materials; and (6) baking is conducted according to a heating curve, and after baking, the targeted heating elements and the furnace lining are sintered into a whole. By the adoption of the method for reforming the heating furnace with the targeted heating elements, radiation heat transfer in the hearth can be greatly enhanced, the service life of the furnace lining is prolonged, energy is saved, and the consumption is lowered.

This steel wire material contains 0.05%-1.2% C (“%” means “% by mass,” same hereinafter for chemical components.), 0.01%-0.7% Si, 0.1%-1.5% Mn, 0.02% max. P (not including 0%), 0.02% max. S (not including 0%), and 0.005% max. N (not including 0%), with the remainder being iron and unavoidable impurities. The steel wire material has a scale 6.0-20 μm thick and holes of an equivalent circle diameter of 1 μm max. in said scale that occupy 10% by area max. Said scale does not detach in the cooling process after hot rolling or during storage or transportation but can readily detach during mechanical descaling.

The steel wire material of the present invention contains 0.05 to 1.2% of C (mass %; same for the chemical components hereafter), 0.01 to 0.5% of Si, 0.1 to 1.5% of Mn, 0.02% or less (but not 0%) of P, 0.02% or less (but not 0%) of S, and 0.005% or less (but not 0%) of N, with the balance being iron and inevitable impurities. The wire material has a scale layer that is no thicker than 7.0 μm or less. The scale layer has an FeO percentage of 30 to 80 vol % and an Fe₂SiO₄ percentage of less than 0.1 vol %. The scale layer that is formed will not peel when cooled after hot rolling or during storage and transport, but will easily peel during mechanical descaling.

The invention discloses a tire type steel continuous-casting and continuous-rolling process and a device thereof. The process comprises the following steps of: A, a melting pot; B, pouring and boiling; C, tire rotating for crystallization; D, straightening; and E, continuous rolling without torque. The tire type steel continuous-casting and continuous-rolling device comprises a pouring ladle, a casting wheel, a steel belt, tires, a steel belt pressure device, a straightening device and a hydraulic rolling device, wherein the pouring ladle is arranged above the casting wheel, and the steel belt packs the lower semicircle of the casting wheel; the steel belt is closed around the four tires and clings the lower part of the casting wheel through the steel belt pressure device; the steel belt can glue the casting wheel to rotate; and a spraying device is arranged around the steel belt and the casting wheel. According to the process and the device thereof, the continuous-casting and continuous-rolling procedures are greatly decreased, the production cost is reduced, the production efficiency is greatly increased, and the energy consumption is reduced by more than 30%. A mode of steel belt rotating and indirect cooling is adopted, so that the surface of steel has no crack and less oxide skin, and the quality and precision of finished products are increased. The device has a better economic benefit.

The invention discloses equipment for internal high-pressure formation of high-plastic steel pipes, and belongs to the field of steel pipe quenching; and the equipment for internal high-pressure formation of the high-plastic steel pipes reduces scales on the surfaces of steel pipes. The equipment comprises a travelling bracket; a medium-frequency induction heater and a cooling device are arrangedon the travelling bracket in a steel pipe advancing direction in sequence; the travelling bracket is provided with a travelling device for driving the steel pipes to advance; an insulation device is arranged between the medium-frequency induction heater and the cooling device; the insulation device comprises an insulation bracket, and an insulation layer arranged on the insulation bracket; and through holes for enabling the steel pipes to pass through are formed in the insulation layer. As the insulation device is arranged between the medium-frequency induction heater and the cooling device, the scales on the surfaces of the produced steel pipes are few, and the structural strength of the steel pipes is higher.

The invention provides a butterfly-shaped cylinder bottom closed die forging structure. A die assembly concave edge is arranged on the edge of a lower die, and a cavity in the lower die is higher than the die assembly concave edge; and the edge of an upper die is provided with a lock catch matched with the die assembly concave edge, after die assembly, the lock catch is clamped on the die assembly concave edge to seal a casting cavity, and in the vertical direction, the angle between the vertical edge of the lock catch and the vertical edge of the die assembly concave edge is 3.5-5 degrees. The butterfly-shaped cylinder bottom closed die forging structure has the advantages that under the condition that closed die forging is adopted, a forge piece is free of flash waste, materials are saved, and the material cost is reduced; no residual flash exists at the outer circle, the quality of the forge piece is improved, the machining allowance is reduced, and the production efficiency is improved; and when the forge piece is forged, the spherical surface faces upwards, and the oxide skin of a spherical part is reduced.

The invention belongs to the technical field of powder metallurgy materials, and relates to a flat-mold hot extrusion process of nickel-based powder superalloy FGH4096. The surface of a nickel-based powder superalloy FGH4096 blank subjected to hot isostatic pressing treatment is uniformly coated with an antioxidant, so that the oxidation of the blank after high-temperature heating can be greatly reduced, the oxide skin on the surface of the blank is reduced, the resistance in the extrusion process can be reduced, and the phenomenon that the surface quality of an extruded bar becomes poor due to too much oxide skin can be reduced; in addition, the transfer time of the blank from discharging to an extrusion workbench is controlled to be less than or equal to 50s, and a glass lubricant is quickly and uniformly sprayed on the surface of the blank during the period, so that the resistance in the extrusion process is reduced, and the resistance is reduced. According to the process, cracking in the hot extrusion process of the blank can be avoided, original particle boundary substances (PPB) are eliminated, heat-induced holes are closed, grains are refined, distribution of precipitated phases is adjusted, meanwhile, plasticity can be improved, and the fatigue life can be prolonged.