83results about How to "Improve surfacing efficiency" patented technology

A light guide plate is formed of a light introducing part positioned to face a point light source for confining light and a light guide plate body having a thickness smaller than the thickness of an end of the light introducing part on a point light source side and causing the confined light to be output from a light exit surface to outside. The light introducing part has an inclined surface, and a directivity conversion pattern formed on the inclined surface. The directivity conversion pattern is configured by arranging V grooves in parallel to each other, each having a vertical angle of 120°, and each extends in a direction approximately perpendicular to a light incidence end face of the light guide plate. The length of the inclined surface in a inclination direction where part of light incident to the light introducing part enters the inclined surface at least twice.

The invention discloses a novel resurfacing welding cored welding strip which consists of a steel tube circled by steel strips and drug powder wrapped in the steel tube, the steel strips comprises an upper steel strip and a lower steel strip which can be purchased in the market. The shape of the steel tube circled by steel strips is that the longitudinal cross section is long flat form or rectangle-like shape, the longitudinal length is determined at will, and the steel tube can be cut out at will or winded into a tray according to requirements. The transverse edges of the upper steel strip and the lower steel strip are connected at the upper steel strip side in a related joint form, and the drug powder is filled in the steel tube circled by the steel strips evenly with the filling rate being 20-80%. According to the different types of resurfacing metals, the content of alloy element in the resurfacing welding cored welding strip is different. The cored welding strip has simple production equipment and technique, and low production cost, thus overcoming the defect that alloy welding filament used for filament resurfacing welding is difficult to produce and the problems of large investment on production equipment, high production cost and expensive price in cored welding filament production.

The invention relates to a vibrating wire-feeding method which is characterized in that right and left swinging of a welding gun is combined with reciprocating vibration of a welding wire; the automatic wire-feeding process is accompanied by the axial vibration of the welding wire; a molten welding material is deposited on the internal wall of a pipe, and the fluidity of a welding pool is greatly improved, so as to further improve the surfacing efficiency; the vibrating welding wire can uniformly stir the molten pool in the melting process of the welding wire, especially for the material with poor fluidity, such as nickel-base alloy, so that gas can escape rapidly when metal in the molten pool is stirred, and hot welding cracks and pores are reduced; as the vibrating wire-feeding stirs the molten pool, solidification and crystallization in the molten pool are uniform; the metallurgical structure of a surfacing layer is uniform and exquisite; the mechanical property of the surfacing layer is greatly superior to those of normal argon tungsten-arc welding and gas metal-arc welding; the quality of a surfacing joint is improved to a great extent; the property is good; the yield of products is greatly increased; and the property of the surfacing joint is greatly improved.

The invention discloses a flux-cored steel-belt that contains steel wires and is used for surfacing and a preparation method thereof. The flux-cored steel-belt is produced from low-carbon steel belts and powder and a steel wire enwrapped therein. The shape of the steel belts is a tube, of which the vertical cross section is in a long flat shape or a rectangle-like shape and the horizontal sides are connected in a closing form or a lapping form. The powder is evenly filled in the tube rolled from the steel belts and the steel wire which is arranged vertically along the tube, has the same length with the tube and positioned at the geometric center of the vertical cross section of the flux-cored steel-belt is clamped in the middle of the powder. Through the adjustment of clamping the steel wire and the powder flux-cored steel-belt of the invention, the variety of steel belts used for surfacing is added, thus reducing cost. The flux-cored steel-belt can be wound into a disk-like shape, thus being suitable for continuous automatic surfacing, leading the application field of strip surfacing to expand, increasing the stability of electric arc and reducing the technical requirements against welding equipment.

The invention relates to a roller surfacing technology. The roller surfacing technology comprises the steps of firstly, checking before welding; secondly, preheating before welding; thirdly, performing surfacing machining; and fourthly, performing post-weld heat treatment. The roller surfacing technology has the advantages that a worn part of a roller can be repaired, meanwhile, the hardness and the wear resistance of the roller can be greatly improved, and therefore the service life of the roller can be prolonged, and the roller surfacing efficiency can be improved.

The invention relates to an in-situ stress-free resurfacing welding repair process of the abrasion of a large-sized rotor journal. The process comprises the following steps of: (1), carrying out the preparation work of resurfacing welding, filing and shaping burrs, acute angles and the like at the abraded positions of the large-sized rotor journal, cleaning oil spots and rusty scales chemically, then removing repaired positions and covering fatigue layers; (2), carrying out stress-free resurfacing welding, melting a welding wire coldly by adopting a stress-free resurfacing welding machine, carrying out resurfacing welding without temperature rise on the abraded positions of the journal and remaining a processing redundancy; (3), carrying out rough grinding, then carrying out resurfacing welding on defects after rough grinding and afterwards carrying out polishing and fine grinding; and (4), finally, polishing to reach the required size of the rotor journal. The invention adopts a stress-free resurfacing welding technique, has high strength, good quality, high efficiency, short construction period and low cost, enables the in-situ high-quality repair of the abrasion of the large-sized rotor journal to become actual and provides powerful guarantee for the long-term safe running of a generator set; and a resurfacing welding layer and a rotor basal body are in metallurgical bonding.

The invention provides a flange resurfacing welding method which is characterized in that the method comprises the following specific steps: step 1. performing rough machining to the surface of flanges while reserving working allowance, drying welding rods, removing iron rust, greasy dirt and oxide on the surface of welding rods; step 2. using an electrothermal equipment to preheat the surface offlanges, step 3. adopting argon tungsten-arc welding method for the overlaying of flanges under conditions that the protective gas is argon gas with the purity of 99.99%, the flow of the protective gas is 15-20L/Min, the current adopts direct current electrode negative polarity, the current value is 150-200A, the voltage value is 12-15V, the welding speed is 140-220mm/Min, the wire feed rate is 1600-2000mm/Min, and step 4. annealing the flanges after overlaying at 610-720 DEG for 2.5-4h. The invention has the advantage that compared with ordinary flange overlaying, the process of the inventionhas high overlaying efficiency, stable quality control and low dilution rate, thus the corrosion resistance is greatly improved.

The invention discloses a high-efficient energy-saving and surfacing layer well-forming self-shielded flux-cored welding wire. A low-carbon steel belt is an outer skin; and a flux core comprises the following components in percentage by mass: 42-60% of high carbon ferro-chrome with the particle size of 80 meshes, 10-18% of ferrosilicon, 16-25% of ferroboron, 2-8% of rare earth silicon, 2-8% of graphene, 1-4% of aluminum magnesium alloy, 2-5% of manganese powder and the balance of iron powder, wherein the graphene, the aluminum magnesium alloy and the manganese powder are added with two kinds of particle sizes of 60 meshes and 200 meshes, and the weight of the flux core powder accounts for 49-53% of the total weight of the welding wire. According to the welding wire provided by the invention, by adding the flux core components with different particle sizes, good welding technological performance is ensured; and by adding B, Si and other self-fluxing alloy elements simultaneously in the flux core, the fusing point of the welding wire is effectively lowered; a welding process window is expanded; the surfacing efficiency is improved; a high-efficient and energy-saving effect is realized; and the surface tension of a surfacing welding bead is effectively lowered, and the forming of the surfacing welding bead is effectively improved.

The invention provides a flat round-corner-shaped bead welding rod having coatings with different thicknesses. The section of a welding core is in a flat round corner shape, the width ratio of the welding core and each flat plane is 1;1.5-3, and the radius of each round corner is half of the thickness of the welding core. The sections of coatings are in different thickness shapes, the thicknesses of the coatings coated on the outside of the two flat planes are 1.6-3 mm, and the thicknesses of the coatings coated on the outside of the two round corners are 1.2-2.0 mm. The flat round-corner-shaped bead welding rod can obviously increase the weight ratio of the coatings of welding rods (effective areas of the coatings coated on the flat-round-corner-shaped welding core having the same section are much larger than that of a round-bar-shaped welding core), and much abrasion-resistant alloy is melted and transited into bead welding joints to improve abrasion-resistant performance. Much alloy material having good electrical conductivity is added to improve melting speed and arc stability of the coatings, and the technical problems that two coatings of the two round corners of the welding rod, on two sides, fall off and are melted incompletely because of ultra-thicknesses of the coatings are resolved.

Provided is a method and apparatus for fabricating a polycrystalline silicon film using a transparent substrate. The method includes forming a light absorption layer on a surface of the transparent substrate; and heating the light absorption layer using irradiation of Rapid Thermal Process (RTP) light source, while depositing the polycrystalline silicon film on the light absorption layer.

The invention discloses a submerged arc flux-cored wire for Cr13 series universal type build up welding, preparation for the submerged arc flux-cored wire and application for the submerged arc flux-cored wire. The flux-cored wire comprises a cover and an encapsulated flux-cored core wire, wherein the weight of the flux-cored core wire accounts for 35-36% of the total weight; and the flux-cored core wire comprises the following components in percentage by weight: 2.8-6% of high carbon ferro-chrome, 2.5-3.5% of micro-carbon ferro chrome, 11-13% of chromium metal, 2-3.6% of nickel powder, 1.5-2% of ferro-molybdenum, 2.8-4.5% of mid-carbon ferromanganese, 1-5.4% of ferrotitanium and the balance iron powder. The submerged arc flux-cored wire for the Cr13 series universal type build up welding is high in build up welding; the hardness of a build up welding layer is stable and uniform (the hardness deviation is smaller than or equal to HRC 3); and welding technological properties are excellent.

The invention discloses a thick-wire single-power-source shallow-fusion-depth high-efficiency submerged-arc automatic surfacing process method. The method comprises the following steps that a weldingwire is used for winding six fine welding wires around one center welding wire to be spiraled into a spiral structure; and the prepared welding wire is fed into a welding area of a submerged-arc automatic trolley through a wire guide pipe and is connected with a welding power source to transmit welding current, the submerged-arc automatic trolley can move along the joint of a base material, meanwhile, a flux is applied to the welding area in an assisted mode until surfacing is completed. According to the method, the rotation motion of the welding arc is further driven under the action of mechanical rotation generated during feeding of the spiral-shaped single wires, a liquid molten pool is forced to carry out fluid motion perpendicular to the fusion depth direction so as to reduce the convection motion of the metal in the molten pool to the bottom, so that the heat inside the molten pool is conducted in the width direction of a weld joint, then the melting amount of the root of the molten pool is reduced, and a welding bead is enabled to be expanded in the width direction. According to the process method, the cable type welding wire shallow fusion depth with the diameter of 6.0 mmand wide-bead submerged-arc automatic surfacing are achieved, extremely high surfacing efficiency is realized, meanwhile, the welding cost can be further reduced.

The invention discloses a phase proportion control method for surfacing welding of a two-phase corrosion resistant layer on the surface of carbon steel. The phase proportion control method comprises the following specific steps that a transition isolation layer, a filling layer and a cover layer are sequentially arranged on a base material through surfacing welding; the high-nickel ultra-low carbon austenitic deposited metal is adopted as the transition isolation layer; high-chromium and high-nickel stainless steel electrode is adopted for large-current and high-efficiency arc surfacing welding to form the filling layer, namely the super alloyed anti-corrosion surfacing welding layer of an austenite-ferrite double-phase structure; the interlayer temperature is controlled to be 120 DEG C orlower in the process of surfacing welding; small-current gas shielded tungsten arc welding is adopted for cover surface surfacing welding to form the cover layer; the post weld heat treatment is notneeded after surfacing welding is finished; and the penetrant inspection is carried out 24 hours after welding, and the ferrite content is measured through a ferrite tester. According to the weldingmethod, two-phase structure corrosion-resistant surfacing welding layer with approximately equal proportion can be formed, and heat treatment is not needed after welding so that the machining technology can be simplified, and the manufacturing cost can be reduced.

The invention discloses a sintering flux used for stainless steel high-speed electro-slag strip surfacing and a preparation method for the same. The sintering flux is made of 6-10 parts by weight of SiO2, 0.5-1 part by weight of MgO, 16-20 parts by weight of Al2O3, 65-85 parts by weight of CaF2, 2-4 parts by weight of CaO and 0.5-2 parts by weight of MnO. The preparation method comprises the steps that all the constituent power materials of the sintering flux are mixed according to proportion ratios, so a first mixed materials is obtained; a binder which occupies 15-20% of the weight of the first mixed material is added, and the mixture is mixed, stirred and pelleted, so that a second mixed material is obtained; and the second mixed material is successively processed by low-temperature baking of 100-200 DEG C and high-temperature sintering of 600-800 DEG C, so the sintering flux can be obtained after screening. The sintering flux disclosed by the invention has the advantages that surfacing efficiency is twice the surfacing efficiency of common electro-slag strip surfacing during the same period, and the sintering flux has god welding technological performance and mechanical properties.

The invention discloses a double-coated electrode and a preparation method thereof. The double-coated electrode comprises an inner coating, an outer coating and two core wires; the inner coating is located between the two core wires, and the graphite content of the inner coating is 4% below the critical graphite content at which the electrode can be broken through; the outer coating wraps the twocore wires parallel to each other, and the content of graphite in the outer coating is 10-15%; and the interval between the two core wires is 0.8-2.0 mm, and the two coatings are bonded through an adhesive. The invention provides the electrode containing the inner and outer coating structures, by arranging the two coatings different in graphite content, the situation that electrode breaking through may occurs because that the two core wires are electro-conductive is avoided, and normal use of the electrode is ensured. The electrode provided by the invention is high in overlaying efficiency, safe and capable of saving energy, the overlaying hardness is high, and the abrasion weight loss is greatly decreased.

The invention provides a welding scheme for a crown wear-resistant block of a single crystal turbine blade and relates to the technical field of non-traditional machining. According to the welding scheme, welding current is adjusted to be 30-45 A, the amount of argon is adjusted to be 8-12 L/min, and the crown part of the blade fixed on a fixture is subjected to surfacing for 1-5 s; then the surfacing effect is checked, whether an alloy is full, whether a corner R is provided with holes and whether a welding part has crack defects are checked, and blades with defective appearance are removed;hardness of substrates of an accumulation layer and a surfacing position, crystalline phase structure of the substrates in the surfacing position, welding quality and depth of a fusion layer at a weldjoint are subjected to metallographic inspection. The condition of falling of the wear-resistant block after welding can be solved, repeated brazing caused by falling of the wear-resistant block during brazing is avoided, so that production time is saved, cost is saved, qualification rate of argon arc welding surfacing is high, machining quality is guaranteed, and production efficiency is improved.