320 results about "Solder material" patented technology

A connector configured to connect densely disposed cables to a board. The connector may include two or more rows of terminals held by a housing such that the two or more rows of terminals are at a same height with respect to a board that the connector would be mounted to. Such a configuration enables the connector to fit into a space limited by, for example, another component mounted to the board. The terminals may include first contact portions configured to be mounted onto a surface of the board when pressure is applied to the terminals so as to avoid the use of materials that may cause undesired shorting such as soldering materials. The terminals may include second contact portions configured to receive the cables. The second contact portions of ground terminals of a same row may be connected by a strip configured to contact shields of cables attached to the row.

The invention belongs to the technical field of electronic packaging and welding materials, and relates to lead-free solder powder for reflow soldering and a preparation method of the lead-free solder powder. The lead-free solder powder is based on a Sn-Ag-Cu alloy system, and melt purification, beta-Sn grain refinement and interface IMC stabilization are achieved by compositely adding trace Ce and Ni elements. The Sn-Cu-Ce alloy comprises the following components in percentage by mass: 2.9%-3.1% of Ag, 0.45%-0.55% of Cu, 0.01%-0.10% of Ce, 0.01%-0.05% of Ni and the balance of Sn and impurities. During preparation, a Ce-Ni intermediate alloy is adopted to introduce microalloy elements, and the spherical solder powder is obtained through vacuum melting, inert gas atomization and surface treatment. The obtained solder powder is low in oxygen content, good in wettability, slow in interface IMC growth after backflow, high in welding spot strength and excellent in thermal cycle reliability, and is suitable for the field of high-reliability electronic packaging.

The application belongs to the technical field of welding materials, and discloses a preformed soldering sheet and a preparation method thereof, the preparation method comprising: a flux preparation method, wherein benocyclobutene resin, a thixotropic agent, an active agent, a surfactant, an antioxidant, a corrosion inhibitor and a solvent are weighed, mixed and heated and stirred to mix, and then cooled to obtain the required flux; a processing method of a preformed soldering sheet body soldering strip, wherein lead-free filler metal is melted at high temperature to form a soldering strip; and a preformed soldering sheet preparation method, wherein the soldering strip is uniformly coated with the flux by a coating machine, and the flux is cured and attached to the soldering strip after baking; the preformed soldering sheet is obtained by the above preparation method. The application realizes improved welding quality of the soldering sheet coated with the flux film and solder metal oxidation resistance, and the preformed soldering sheet has high stability, good wettability and good weldability, and can meet the requirements of the market for the use of the preformed soldering sheet with low cavities.

The invention discloses a heat-treatment-free control method for inhibiting hydrogen-induced cracks in ultrahigh-strength steel welding, which belongs to the technical field of welding, and enables weld metal to obtain a low-phase-transition-temperature characteristic and a double-phase structure containing retained austenite under a specific dilution rate window by cooperatively regulating and controlling components of a welding material and welding process parameters. Therefore, preheating-free and post-heat-treatment-free efficient welding of the ultrahigh-strength steel is achieved. According to the method, the volume expansion effect generated by low-temperature martensite phase transformation of weld metal is utilized to actively counteract restrained tensile stress formed by welding cooling shrinkage; on the other hand, the effect of the retained austenite serving as an efficient'hydrogen trap 'is fully played, migration and enrichment of hydrogen to crack sensitive areas such as a heat affected zone or a fusion line are effectively blocked, and finally effective inhibition of hydrogen-induced cracks in ultrahigh-strength steel welding is achieved; the obtained welding joint is free of hydrogen-induced cracks and has the mechanical property level well matched with base metal.

The invention provides a method for inhibiting abnormal grain growth of a 7xxx series aluminum alloy friction stir welding joint, which comprises the following steps: step 1), performing wire filling welding treatment on a to-be-welded aluminum alloy part to obtain a welding part; wherein the welding flux is an aluminum alloy containing a scandium element; (2) the welding part is subjected to friction stir welding treatment, and a friction stir welding head is obtained; and (3) post-treatment is conducted on the friction stir welding head. Welding materials used are characterized in that a certain amount of scandium is added, then differential friction stir welding treatment is carried out, the differential friction stir welding treatment is carried out by independently regulating and controlling the rotating speed of a shaft shoulder and the rotating speed of a stirring needle, and on the premise that the rotating speed of the stirring needle is greatly increased to improve material flowing, the welding efficiency is greatly improved. The low shaft shoulder rotating speed is applied to eliminate overheating, defects are avoided, pinning particles are dispersed, and the effect of completely inhibiting growth of abnormal crystal grains is achieved.

The invention relates to a preheating-free 690MPa-grade high-strength and high-toughness submerged-arc welding wire, a preparation method thereof and a submerged-arc welding process, and belongs to the technical field of welding materials. The welding wire comprises the following chemical components in percentage by mass: 0.07 to 0.10 percent of C; 0.25% to 0.50% of Si; mn: 1.20% to 1.50%; 0.20% to 0.50% of Cr; 2.10% to 3.30% of Ni; 0.45% to 0.65% of Mo; 0.03% to 0.05% of Ti; s < = 0.005%; p < = 0.005%; and the balance of Fe. By optimizing the content of C and the proportion of Ni and introducing Ti microalloying means and combining low-S and low-P control and hydrogen control processes, preheating-free welding of the 690 MPa-grade low-temperature high-strength steel under the normal-temperature or low-temperature condition is achieved, traditional preheating operation is avoided, energy consumption is reduced, and the process is simplified.

The invention relates to an intelligent evaluation and optimization method and system for the welding spot quality of a lithium battery protection board in the technical field of intelligent manufacturing, and the method comprises the steps: constructing a welding spot stereoscopic model through employing a geometric modeling algorithm based on a three-dimensional point cloud data set, and determining a welding spot tin material climbing angle and a contact interface shape feature; on the basis of the bridging defect occurrence probability distribution, a mode recognition algorithm is adopted to distinguish normal welding spots from various defect categories, and a defect classification result is obtained; generating a welding spot quality evaluation report in combination with the defect classification result and the three-dimensional point cloud data set, and determining an overall welding reliability index; if the overall welding reliability index is lower than a preset threshold value range, an alarm mechanism is triggered, and position coordinate information of related welding spots on a production line is obtained; and based on the welding spot position coordinate information, processing subsequent scanning data by adopting a data optimization algorithm, and judging whether the optimized data meet a preset precision standard or not.

The invention discloses an ultralow-temperature high-toughness non-magnetic steel flux-cored wire for a controllable nuclear fusion device and a preparation method of the ultralow-temperature high-toughness non-magnetic steel flux-cored wire. A special stainless steel strip is adopted to wrap a metal powder type flux core, and the flux core accounts for 29.6%-30.4% of the total mass of the flux-cored wire; the flux core comprises the following components: 14%-18% of electrolytic manganese, 21%-23% of chromium metal, 0.3%-1.0% of ferrotitanium, 4.4%-5.0% of nitrided ferrochromium, 27.5%-28.5% of nickel powder, 0.5%-1.0% of 52 # ferrosilicon, 8%-9% of molybdenum powder, 0.1%-0.3% of lithium fluoride and the balance of atomized iron powder. The problems that an existing non-magnetic steel welding material is insufficient in toughness and high in magnetic conductivity at the ultralow temperature of-269 DEG C are solved by optimizing flux-cored alloy elements of (nickel-chromium-nitrogen) synergistic stable austenite, matching with a manufacturing process of sealed baking and roller die drawing forming of powder at the temperature of 120-140 DEG C and a welding process protected by argon (Ar) with the purity of 99.999%. The AKV2 of a welded joint is larger than or equal to 34J at the temperature of-269 DEG C, the tensile strength is larger than or equal to 620 MPa, the relative permeability is smaller than or equal to 1.02, the problems that nitrogen of an existing solid welding wire is difficult to control, and hardening is easy can be solved, and the welding wire is completely matched with the extreme working condition of a controllable nuclear fusion device.

A solder supply unit able to be attached to a solder cutting unit and is able to detached is provided. The solder supply unit includes a reel holder rotatably holding a reel of a tape-like solder material; and a guidance member guiding the tape-like solder material wound around the reel when the tape-like solder material is fed out. The guidance member includes an extension portion guiding a lower surface of the tape-like solder material along a feeding direction of the tape-like solider material; and an opening penetrating the extension portion in an up-down direction and extending toward an upstream side in the feeding direction from a downstream end of the guidance member. The opening is formed in the predetermined length in the feeding direction so that a holding member, which holds the tape-like solder material together with another holding member, is able to move in the feeding direction.

The present application relates to the technical field of welding material, in particular to a Nb-Ti-Zr-V brazing filler metal for Nb alloy honeycomb brazing, a brazing filler metal coating and a preparation method thereof. The Nb-Ti-Zr-V brazing filler metal for Nb alloy honeycomb brazing comprises 10-25% of Nb, 42-52.5% of Ti, 9-11.25% of Zr and 9-11.25% of V in terms of mass percentage. The purpose of the Nb-Ti-Zr-V brazing filler metal for Nb alloy honeycomb brazing, the brazing filler metal coating and the preparation method thereof is to solve the problem of poor welding rate when Ti-Zr-V brazing filler metal is used for honeycomb brazing.

An electrical connection material having a contrast agent infused within, and related systems and methods of detection thereof, are disclosed herein. Computer electronics such as printed circuit boards have electronic components attached to a substrate by an electrical connection material. The electrical connection material has at least one component infused with a contrast agent. The contrast agent is of a concentration to provide a visual distinction or highlight when imaged by an inspection system, such as an x-ray system of computed tomography (CT) scanning system. The presence of the contrast agent demonstrates that not all of residual electrical connection material has been cleaned away from the printed circuit board after manufacture.

The application discloses a nickel-based flux-cored wire for LNG storage tanks and a preparation method and application thereof, and belongs to the technical field of welding material flux-cored wires, and solves the problem that the mechanical properties and toughness of a weld after welding of an existing welding wire used for welding 9Ni steel plates are not matched with the 9Ni steel, thereby leading to low service life of the storage tank. The nickel-based flux-cored wire comprises a core and a cladding layer cladded outside the core; the cladding layer comprises, in percentage by mass, C: 0.015%, Cr: 14.5%-20.0%, S: 0.04%, P: 0.04%, and the balance of Ni and inevitable impurities; and the core comprises, in percentage by mass, Co: 0.5%-2.5%, Cr: 13.0%-18.0%, Si: 0.15%, Al: 0.01%-0.03%, Mn: 0.001%-0.02%, Mo: 15%-17%, W: 10%-20%, Fe: 10%-15%, and the balance of Ni and inevitable impurities.

This invention belongs to the field of electronic packaging and soldering materials technology, and relates to a lead-free solder powder for reflow soldering and its preparation method. This lead-free solder powder is based on a Sn-Ag-Cu alloy system, and achieves melt purification, β-Sn grain refinement, and interface IMC stabilization by adding trace amounts of Ce and Ni elements. Its composition, by mass percentage, is: Ag 2.9%–3.1%, Cu 0.45%–0.55%, Ce 0.01%–0.10%, Ni 0.01%–0.05%, with the balance being Sn and impurities. During preparation, a Ce-Ni master alloy is used to introduce microalloying elements, followed by vacuum melting, inert gas atomization, and surface treatment to obtain spherical solder powder. The resulting solder powder has low oxygen content, good wettability, slow interface IMC growth after reflow, high solder joint strength, and excellent thermal cycling reliability, making it suitable for high-reliability electronic packaging applications.

The present invention relates to a coil component in which a terminal electrode and a terminal end of a wire are connected by thermocompression bonding at a bottom surface of a flange portion, and the following effects are obtained as a result of thermocompression bonding being appropriately performed without being excessively insufficient, that is, a stable fixing force is obtained for the connection state between the terminal electrode and the terminal end of the wire, and problems caused by the terminal end of the wire protruding from the terminal electrode are less likely to occur. A terminal end (21a) of a wire (21) is in a state of being at least partially disposed inside a terminal electrode (17) and extending along a main surface (25) of the terminal electrode, and has a top surface (33) located at a side opposite to the bottom surface (23) of a flange portion (13) from the main surface. A solder tail surface (37) that rises from the main surface toward the top surface and forms a concave curved surface is formed on an outer surface of the terminal electrode. The main surface is realized by a parent solder material layer (31) composed of tin or a tin alloy that constitutes an outermost layer of the terminal electrode.

The application relates to the field of welding materials, in particular to a low-temperature welding silver paste for a high-speed dispensing system and a preparation method thereof. The low-temperature welding silver paste for the high-speed dispensing system is prepared from raw materials including spherical conductive silver powder with an average particle size of 0.5-1.2 microns, ester alcohol carriers and a functional composition. The low-temperature welding silver paste for the high-speed dispensing system prepared through the application can not only maintain the low-temperature welding application effect, but also has the conductive and heat-conductive performance and mechanical strength, can adapt to the high-speed dispensing process, has good flow uniformity, greatly improves the welding quality, ensures excellent waterproof, moisture resistance and corrosion resistance and other performances, fully solves the performance contradiction problem of the existing low-temperature welding materials, maintains excellent comprehensive performance, and meets the increasingly high performance requirement of the welding materials in the existing application field.

The invention discloses a nickel-based alloy material for laser cladding and GTAW connection. The nickel-based alloy material comprises a laser cladding material and a GTAW welding material, wherein the laser cladding material comprises the following components in percentage by mass: 20.0-30.0% of Ni powder, 20.0-30.0% of Co powder, 10.0-20.0% of Cr powder and the balance of Fe powder, and the sum of the mass percentages of the components is 100%; the GTAW welding material comprises a flux core and a welding skin, the flux core comprises, by mass, 30.0%-40.0% of Fe powder, 10.0%-20.0% of Co powder, 10.0%-20.0% of Ta powder, 3%-6% of Al powder, 3%-6% of Ti powder and the balance Ni powder, and the sum of the mass percentages of the components is 100%. The invention further discloses a nickel-based alloy welding connection method, and the softening problem of the aging-state iron-nickel-based high-temperature alloy joint under the GTAW technology is solved.

A method of making a matrix comprising a plurality of lid assemblies, the method comprising mating to a package lid material a solder preform mesh, comprising solder material and defining openings to form the plurality of lid assemblies wherein each lid assembly comprises a portion of the package lid material and a portion of the solder preform mesh to form a solder seal ring surrounding a respective opening. Alternatively, the solder comprises a solid solder preform. The lid assemblies achieve a hermetic seal that withstand gross leak to fine leak levels as measured by Mil-Std 883.

The invention provides an ultralow-carbon stainless steel flux-cored wire protected by mixed gas, and belongs to the field of welding materials. The invention provides an ultralow-carbon stainless steel flux-cored wire protected by mixed gas. A flux core of the ultralow-carbon stainless steel flux-cored wire comprises the following components in percentage by weight: 1-8% of Mn; 0.1%-1% of Si; 25 to 40 percent of Cr; 15%-30% of Ni; the total amount of Na2O and K2O is 1-7%; 0-1% of fluoride; 1 to 6 percent of TiO2; 8%-15% of SiO2; 4 to 16 parts of ZrO2; 1 to 5 parts of MnO; and the balance of Fe. And the filling rate of the flux core is 24-32%. According to the flux-cored wire, the problems that an existing stainless steel flux-cored wire is many in weld oxidation color, unattractive in weld joint, difficult in deslagging and poor in gas hole sensitivity are solved, welding is conducted under the condition of 80% Ar + 20% CO2 mixed gas, and deposited metal obtained after welding has the tensile strength larger than or equal to 520 Mpa and the ductility larger than or equal to 25%. As a welding material for dissimilar steel butt joint and low alloy steel surface surfacing, good welding process performance, stable electric arc, no splashing and attractive weld joint forming are guaranteed, and it is guaranteed that welded metal has excellent intergranular corrosion performance.

Nickel-based alloy welding wire for welding dissimilar iron / nickel rotors, its preparation method, and its application. This invention belongs to the technical field of nickel-based alloy materials. The purpose of this invention is to solve the technical problem that existing weldable nickel-based alloy welding materials cannot meet the practical engineering needs of welding rotors made of dissimilar nickel-based and iron-based materials. This invention achieves this by comprehensively controlling the composition of the welding wire, especially by precisely controlling the content of Al, Ti, Nb, and Ta, to ensure that the deposited metal maintains high comprehensive mechanical properties at room temperature and high temperature under conditions of no solution aging, and also ensures good welding performance. It is applied to the welding of dissimilar nickel-based and iron-based alloy rotors at 700℃.

Provided is a semiconductor device in which solder bonding of semiconductor chips has been improved. The semiconductor device comprises: a semiconductor chip (3) having a lower main electrode (3a) on the lower side thereof; an insulating circuit substrate including an insulating substrate (11) and an upper conductor layer (12a) disposed on the upper surface of the insulating substrate (11); and a bonding layer (2) for bonding the lower main electrode (3a) of the semiconductor chip (3) to the upper conductor layer (12a). The bonding layer (2) includes: a solder material (2a) containing tin; a filler (2b) containing a first metal having a melting point higher than that of the solder material (2a) and disposed in the solder material (2a); and an alloy layer (2c) comprising an alloy of the first metal and tin contained in the solder material (2a) and provided on the surface of the filler (2b). The alloy layer (2c) connects the lower main electrode (3a) and the upper conductor layer (12a).

A laser compression bonding device comprises: a carrier for placing a substrate; a transparent compression head for holding and displacing an electronic component, wherein the transparent compression head comprises a central portion for pressing the electronic component against the substrate via a solder material when the electronic component is placed on the substrate via the solder material, and a peripheral portion surrounding the central portion; a laser source for emitting a laser beam towards the carrier at least through the central portion of the transparent compression head to heat the solder material such that the electronic component is bonded onto the substrate via the solder material; and a heat spreader attached to the peripheral portion of the transparent compression head, wherein the heat spreader comprises a liquid channel for containing liquid that flows in the liquid channel to exchange heat with the transparent compression head.

The invention discloses a partitioned precise temperature control heat treatment method for a dissimilar steel welding pressure vessel, and belongs to the technical field of steel heat treatment. The method comprises the following steps: respectively setting heat treatment temperatures according to dissimilar steel and welding materials of the dissimilar steel welding pressure vessel; dissimilar steel of the dissimilar steel welding pressure vessel is divided into a high-temperature area and a low-temperature area according to the heat treatment temperature; taking a welding seam as a dynamic thermal barrier area; heating systems of the high-temperature area and the thermal barrier area are started, first heating, heat preservation treatment and second heating are carried out according to the preset temperature, after heating is carried out to the target temperature, nitrogen begins to be filled into the container, the pressure is slowly increased to 1.5-1.8 times of the designed pressure, then heat preservation and pressure maintaining are carried out, then pressure is slowly released, and the pressure is kept constant; slowly cooling to room temperature; and the temperature of the low-temperature area is always lower than the target threshold in the heating process. The obtained welding joint has the comprehensive advantages of being excellent in mechanical property, ideal in residual stress state and intact in corrosion resistance.

An electronic package, a substrate structure and a manufacturing method thereof are provided. An electronic component is disposed on the substrate structure having a plurality of electrical contact pads and a metal sheet by means of solder material. An insulating protective layer of the substrate structure has an opening exposing the plurality of electrical contact pads, the metal sheet is disposed at the periphery of the electrical contact pads, and a separation space is formed so as to reduce the amount of solder paste that spreads out of the solder material, so that the problem of short circuit caused by the expansion of the solder material can be prevented from occurring to each of the plurality of electrical contact pads.

An electrical interconnect structure includes a bond pad having a substantially planar bonding surface, and a solder enhancement structure disposed on the bonding surface and including a plurality of raised spokes each elevated from the bonding surface. Each of the raised spokes has a lower wettability relative to liquefied solder material than the bonding surface. Each of the raised spokes extends radially outward from a center of the solder enhancement structure.

The present application relates to temperature heating and monitoring method in thermal load test, specifically relates to a kind of sample nondestructive temperature monitoring method for thermal load test, comprising the following steps: the deformation of sample in the set thermal compression operating mode is calculated, the size of open collar made of easy-to-weld material is confirmed accordingly, and open collar is made;After the side surface of sample is polished flat with sandpaper, flexible heat-conducting material is wrapped on the side surface of sample, forming "heat-conducting material-sample integrated structure";The open collar is installed on the side surface of "heat-conducting material-sample integrated structure";After welding thermocouple on the surface of open collar, the sample is installed in test loading equipment, and temperature measurement and control in subsequent test process can be carried out, the temperature of open collar and sample reaches equilibrium after insulation, and the temperature measured by thermocouple is the temperature of sample.The present application can guarantee the smooth development of thermal load test, and then obtain the high-temperature service performance of material, to provide basis for its design selection.

This invention relates to the field of welding materials technology, and proposes a stainless steel flux-cored welding wire and its preparation method. The stainless steel flux-cored welding wire consists of a flux core and an outer sheath covering the surface of the flux core. The flux core is composed of the following raw materials in weight percentages: rutile 8%~12%, fluorite 4%~6%, cryolite 1%~2%, potassium feldspar 0.1%~0.3%, zircon sand 0.1%~0.5%, metallic aluminum 0.2%~0.4%, metallic magnesium 0.3%~0.6%, metallic silicon 0.5%~1.0%, calcium carbonate 0.5%~1.5%, with the balance being iron powder. The weight percentages must satisfy (rutile + fluorite) / (metallic aluminum + metallic magnesium + metallic silicon) = 9~12. This technical solution solves the problem of insufficient porosity resistance in welds formed by stainless steel flux-cored welding wires in related technologies.

The invention discloses a high-hardness wear-resistant flux-cored wire for open arc surfacing of coal mine machinery, which belongs to the technical field of welding materials and consists of flux-cored powder and a carbon steel strip. The flux core powder comprises the following raw materials of 20%-80% of high-carbon ferrochrome, 1%-8% of high-carbon ferromanganese, 1%-10% of graphite, 1%-5% of ferrotitanium, 1%-5% of silicon carbide, 0.5%-4% of boron carbide and 0.1%-2% of cryolite. The welding wire is applied to repairing of the chain wheel of the scraper conveyor of the coal mine, the service life is 2.3 times that of a common welding wire, and the comprehensive cost is reduced by 40%.

The high-niobium nickel-based high-temperature corrosion-resistant flux-cored wire containing the rare earth elements comprises a flux core and a welding skin, and the flux core is composed of, by mass, 18%-22% of Cr, 6%-8% of Mo, 3%-6.5% of Nb, 1%-2% of Ti, 0.5%-1% of Al, 0.8%-2% of Mn, 0.3%-0.8% of Si, 0.05%-0.1% of Ce, 0.05%-0.1% of Y and the balance Ni. The invention further discloses a preparation method and a welding method of the high-niobium nickel-based high-temperature corrosion-resistant flux-cored wire containing the rare earth elements. According to the high-niobium nickel-based high-temperature corrosion-resistant flux-cored wire containing the rare earth elements, the problems that an existing welding material is insufficient in endurance strength at the high temperature, high in thermal cycle crack sensitivity and weak in chloride ion stress corrosion resistance are solved; and collaborative optimization of ultrahigh-temperature structure stability, thermal cracking resistance and extreme environment corrosion resistance is realized.

The utility model discloses a faceted display module, which relates to the field of semiconductor LED (light-emitting diode) devices and comprises a PCB (printed circuit board) and a plurality of LED devices, the LED devices are welded and fixedly mounted on one side of the PCB to form an LED module, the faceted display module further comprises filling resin, gaps of the LED devices are filled with the filling resin through a silk-screen / spraying process, and the filling resin is adhered to the PCB and the LED devices; according to the panel display module, after the LED device is welded to one side of the PCB, the space between the LED device and the PCB is filled with the filling resin, white marks caused by residues of a welding material and solder paste soldering flux are covered, meanwhile, connection between the LED device and the PCB is enhanced, the problem that the ink colors of the LED module are inconsistent due to the ink color difference of the PCB is solved, and the display effect of the panel display module is improved. And the contrast ratio of the LED module is improved, and the brightness of the module is not influenced, so that the reliability of a product is improved.