349results about "Welding/cutting media/materials" patented technology

The invention discloses a high-strength silver-free copper-based brazing filler metal which is composed of P, Sn, Ni and Cu. The high-strength silver-free copper-based brazing filler metal is low in cost, safe, environmentally friendly and good in welding effect; through the adding of Sn and Ni, the melting point of brazing filler metal alloy is reduced, and the tensile strength and wettability of the brazing filler metal alloy are enhanced.

To provide an electrode for solid-phase resistance spot bonding that can suppress the deterioration of bonding quality. [Solution] The solid-phase resistance spot bonding electrode 10 comprises a cylindrical portion 11 that extends in the axial direction and has one end portion 12 in the axial direction. The end portion 12 includes a tip surface 14 that is pressed against the workpieces 301, 302. The end portion 12 is divided into multiple pieces that are spaced apart from each other in the circumferential direction of the cylindrical portion 11 when viewed from the tip surface 14 side, by having multiple slits 50 cut into it in the axial direction.

Disclosed in the present application are a hard alloy welding powder for hardfacing of valve sealing surfaces and a preparation method therefor. The welding powder comprises the following components in percentage by mass: 1.20-1.40% of C element, 2.70-3.5% of Si element, 3.00-4.50% of Mn element, 24.00-26.00% of Cr element, 2.00-2.20% of Mo element, 3.50-4.50% of Ni element, less than or equal to 0.20% of Co element, less than or equal to 0.02% of B element, less than or equal to 0.10% of N element, and the balance of Fe element. The preparation method comprises: weighing raw materials, mixing the raw materials, and smelting same to obtain molten alloy; and atomizing the molten alloy by means of gas to produce powder, and screening same to obtain hard alloy welding powder. The present application strictly limits the content of Co element, and properties such as hardness can meet design requirements; the preparation method has a simple and reliable process.

Provided are a solder alloy, a solder paste, a solder ball, and a solder joint which have a low melting point, are excellent in ductility, shear strength, and heat cycle resistance, further suppress the occurrence of open defects, and in addition, have reduced residual voids even at the time of joining in a large area. A solder alloy has an alloy composition of, by mass %, Bi: 35.0 to 68.0%, Sb: 0.1 to 2.0%, Ni: 0.010 to 0.050%, Ge: 0.007 to 0.090%, with the balance being Sn. Preferably, the alloy composition further contains, by mass %, at least one of Co, Ti, Al, Mn, As, Fe, Pd, Zn, Zr, Pb, In, Ce, P, and Ga: 0.1% or less in total. Further, this solder alloy can be suitably used for solder pastes, solder balls, and solder joints.

This invention provides a brazing filler metal, a brazing filler metal preparation method, and a rectifier brazing method. The brazing filler metal includes a first brazing filler metal and a second brazing filler metal. The brazing filler metal preparation method involves uniformly mixing high-temperature alloy powder and brazing binder at a mass ratio of 2:1 to 3:1 to form the first brazing filler metal; and uniformly mixing BNi2 powder and brazing binder at a mass ratio of 10:1 to 15:1 to form the second brazing filler metal. By specifying brazing filler metals with a specific particle size ratio and applying different types of brazing filler metals in different zones, defects such as incomplete welding and porosity that are difficult to control in large-gap welds during processing and assembly are solved, improving the welding quality of welds with both large and small gaps, thereby increasing the product qualification rate.

The present invention relates to a wire rod for welding rods and a manufacturing method therefor. One aspect of the present invention is to provide a wire rod for welding rods and a manufacturing method therefor. A preferred aspect of the present invention is to provide: a wire rod for welding rods, having superior strength and wire drawability as well as excellent cost-effectiveness; and a manufacturing method therefor.

This application provides a brazing solder and a welding assembly. The brazing solder includes a first element, aluminum, and titanium. The first element and aluminum form a first alloy phase, which constitutes the main body of the brazing solder. The melting point of the first alloy phase is lower than that of aluminum. This application can form high-quality brazed connections between ceramics and low-melting-point metals.

The application discloses a high-entropy alloy wear-resistant coating flux-cored wire, which comprises a flux core and a welding sheath; the flux core is composed of the following components: Ti: 25%-30%, Ta: 20%-25%, Al: 20%-23%, Mn: 20%-23%, Y: 5%-15%, and the sum of the atomic percentages of the above components is 100%; the welding sheath is an FeCoNi strip, and the welding sheath is composed of the following components: Cr: 0.006%, Cu: 0.011%, C: 0.1%, Co: 17.31%, Ni: 29.08%, Si: 1%, and Fe is the balance. The application further discloses a preparation method and application of the high-entropy alloy wear-resistant coating flux-cored wire. The application solves the problems of insufficient high-temperature performance, easy wear and easy corrosion of a new nuclear power turbine blade TC4 surface under a long-term working environment.

One object of the present application is to provide composite copper nanoparticles that have high dispersibility in organic solvents and can be used to form a smooth electrode film. The present invention provides composite copper nanoparticles in which the surfaces of copper nanoparticles are modified with a silane coupling agent, wherein the copper nanoparticles have a coating film containing copper oxide on at least a part of the surface, and wherein the mass carbon concentration derived from the silane coupling agent in the composite copper nanoparticles is 0.1 to 1.2% by mass with respect to the total mass of the composite copper nanoparticles or wherein the number of surface groups derived from the silane coupling agent on the surface of the composite copper nanoparticles is 1.0 to 13.0 per 1 nm2 of the surface area of the composite copper nanoparticles

The application discloses an oriented structure graphene / copper composite filler metal, graphene is coated on the surface of flaky copper powder, and then is compacted, so that the graphene and copper are closely arranged in layers and intervals. The application further discloses a preparation method of the oriented structure graphene / copper composite filler metal, comprising the following steps: taking the flaky copper powder coated with graphene to perform hot-pressing sintering or discharge plasma sintering, so as to obtain the oriented structure graphene / copper composite filler metal. The application further discloses a sandwich composite brazing structure. The application further discloses application of the oriented structure graphene / copper composite filler metal and the sandwich composite brazing structure in ceramic and metal welding. The application further discloses a welding method. In the oriented structure graphene / copper composite filler metal, the graphene and copper are closely arranged in layers and intervals, and the arrangement orientation of the graphene is kept consistent; when brazing, the graphene can effectively hinder active elements such as Ti from corroding the copper matrix, reduce the residual stress of the welded joint, and improve the welding strength.

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.

Presented herein are alloys based on Mo-Ni, where when coated using PTA, LC, HVOF, HVAF and / or APS, a dense and durable coating is formed. When the alloys of the present invention are applied in a thickness from 0.1 mm - 5 mm, the resulting coating is suitable for use as a coating for the pot rolls of a galvanizing line.

Provided is a curable resin composition for solder resist use containing:(A) a bismaleimide compound represented by formula (1) defined aswherein, in the formula (1), each A independently represents a tetravalent organic group having a cyclic structure, each B independently represents a divalent hydrocarbon group derived from a dimer acid skeleton, each Q independently represents a divalent hydrocarbon group having an alicyclic structure or a divalent hydrocarbon group having an aromatic ring, W is B or Q, n is a number of 1 to 100, m is a number of 1 to 100, and repeating units in square brackets with subscripts n and m are arranged in any order;(B) a citraconimide compound;(C) an epoxy resin;(D) a curing accelerator; and(E) an inorganic filler.

To suppress generation of shrinkage.SOLUTION: The electronic device includes: a first electronic component having a Ni-based electrode; and a second electronic component joined to the Ni-based electrode by a Sn-based solder. There is a (Cu, Ni, Pd)6Sn5 compound layer in the interface of the joint part of the Ni-based electrode and the Sn-based solder. The content of Pd as a (Pd, Ni)Sn4 compound in the mother phase of the Sn-based solder after the joint is smaller than the content of Pd as a (Cu, Ni, Pd)6Sn5 compound layer or is zero.SELECTED DRAWING: Figure 3

To provide a flux that makes it possible to further suppress temporal viscosity change in a solder paste, and a solder paste including the flux.SOLUTION: The present invention provides an agent for suppressing viscosity increase in a solder flux, which is used to suppress viscosity increase in a solder paste that contains solder alloy powder and a solder flux. The agent includes a thiol compound having a benzenethiol backbone in which at least one hydrogen atom on a benzene ring is substituted with a mercapto group (-SH). As the thiol compound having the benzenethiol backbone, at least one selected from the group consisting of 2-aminobenzene thiol, 4-aminobenzene thiol, 3-aminobenzene thiol and benzene thiol is preferable.SELECTED DRAWING: None

A lead-free solder alloy comprising: from 0.5 to 4 wt.% silver, from 0.5 to 12 wt.% bismuth, from 0.1 to 1 wt.% copper, from 0.005 to 0.2 wt.% nickel, from 12 to 22 wt.% indium, optionally one or more of: from greater than 0 to 0.02 wt.% germanium, from greater than 0 to 0.03 wt.% titanium, from greater than 0 to 5.5 wt.% antimony, from greater than 0 to 1 wt.% manganese, from greater than 0 to 1 wt.% cobalt, from greater than 0 to 1 wt.% rare earths, from greater than 0 to 1 wt.% aluminium, from greater than 0 to 1 wt.% silicon, from greater than 0 to 1 wt.% chromium, from greater than 0 to 1 wt.% iron, from greater than 0 to 1 wt.% zinc, from greater than 0 to 1 wt.% gallium, and the balance tin, together with any unavoidable impurities.

The application discloses a nickel-based flux-cored wire and a preparation method and application thereof. The nano tungsten trioxide is introduced into the nickel-based flux-cored wire, the high-temperature strength and hot strength of the nickel-based alloy are improved, meanwhile, the hardness, friction performance and corrosion resistance of the alloy are improved, and the problems of low high-temperature corrosion strength, hot strength and mechanical performance of the nickel-based flux-cored wire are solved.

The present invention aims to provide a solder material that can suppress non-wetting by improving the solder wetting performance on the core material during primary mounting. [Solution] It is a soldering material, A conductive core material, and Solder layer surrounding the aforementioned nuclear material Includes, The solder material that satisfies the following equation (1): Ts≧-0.25Dc+10⁵ (1) (Dc: diameter of the core material (μm), Ts: thickness of the solder layer on both sides of the core material (μm)).

The purpose of the present invention is to provide a solder material capable of suppressing non-wetting by improving solder wetting performance on a core material during primary mounting.　This solder material comprises a conductive core material and a solder layer present around the core material, and satisfies the following formula (1).　Formula (1): Ts ≥ −0.25Dc + 105 (where Dc is the diameter of the core material (μm), and Ts is the thickness of the solder layer present on both sides of the core material (μm)).

The application discloses a kind of high-strength wear-resistant steel gas shielded welding wire and preparation method thereof, the chemical composition of the welding wire includes C:0.09-0.15%, Si:0.55-0.82%, Mn:2.30-2.85%, Ni:0.10-0.45%, Cr:0.02-0.06%, Nb:0.03-0.06% and the like;Its preparation method is: after raw materials are mixed, smelted by vacuum induction furnace, forged, hot-rolled, annealed to form wire rod steel, pickling removes wire rod steel surface oxide skin, after rough drawing, precision drawing, heat treatment, cleaning, copper plating is prepared after drying;The welding wire is applied to high-strength wear-resistant steel welding process for CO2 gas shielded welding, adopts three-pass welding process method;It can significantly improve the impact toughness of welded joint weld zone and heat affected zone, meets the welding requirement of high-strength wear-resistant steel, expands the application field of high-strength wear-resistant steel, and further promotes the development of new equipment manufacturing industry.

The invention discloses a novel method for preparing a metal bonding substrate. A method may include providing a ceramic substrate including a ceramic body. The method may include bonding a thick metal plate to the ceramic substrate, where the bonding includes forming a metal oxide layer by powder deposition on a metal surface and bonding the ceramic substrate and the thick metal plate together, where after the bonding, the ceramic substrate and the thick metal plate are bonded together. The metal oxide layer and the thick metal plate interact to form an interfacial layer between the thick metal plate and the ceramic substrate.

The objective is to provide welded joints with excellent resistance to ammonia stress corrosion cracking. [Solution] The present invention relates to a welded joint having two or more steel plates and a welded joint formed by welding the steel plates together, wherein the Vickers hardness of the weld metal at a position 1 mm from the surface of the weld is 230 HV10 or less, and the component composition at a position 1 mm from the surface of the weld metal is 0.28 or less in terms of Ceq, which is expressed by a predetermined relational formula.

The application discloses a brazing filler metal for titanium alloy and stainless steel connection and application thereof, and the brazing filler metal comprises an Ag-Cu eutectic brazing filler metal base and NiTi alloy particles. By introducing the NiTi alloy particles into the Ag-Cu eutectic brazing filler metal base, the Ni and Ti in the interface neighborhood are cooperatively involved in diffusion and reaction, the wetting and forming consistency of the brazing filler metal are cooperatively improved, the interface reaction layer is formed into a discrete thin layer, the continuous brittle reaction layer is inhibited from being generated, the risk of crack propagation along the interface is reduced, the shear strength of the brazing filler metal welding joint for titanium alloy and stainless steel connection is remarkably improved, and the forming quality and batch consistency of the brazing joint are improved.

The application discloses a lead soldering paste capable of preventing tin explosion and a preparation method thereof. The lead soldering paste comprises the following components in parts by weight: soldering paste 8-12 parts, anti-water absorption composite material 5-10 parts and lead soldering powder 80-90 parts. The soldering paste comprises the following components in parts by weight: rosin 30-50 parts, solvent 30-50 parts, additive 3-15 parts, thixotropic agent 4-8 parts, organic acid 5-10 parts, halogen compound 1-5 parts and antioxidant 0.5-5 parts. In the application, the montmorillonite composite material is immersed in a prepared resin solution to form a resin layer with strong anti-water absorption performance on the surface of the montmorillonite composite material, thereby forming the anti-water absorption composite material. When the anti-water absorption composite material is introduced into the soldering paste, the anti-water absorption composite material has a multi-layer structure, can form a multi-layer dense continuous phase structure anti-water absorption layer by mutual embedding and insertion, effectively prevents the penetration of water in the air, reduces the absorption of water by the soldering paste in a high-humidity environment, thereby avoiding the occurrence of tin explosion in soldering, and remarkably promotes the improvement of product yield and production efficiency.

This invention relates to the field of solder powder technology, specifically to an antioxidant solder powder and its preparation method. The solder powder uses SAC305 tin-silver-copper alloy solder powder as a matrix, and its surface has an antioxidant treatment layer formed by segmented anchoring of single-terminated phosphate-based polyether oligomers and spacer regulation by polyethylene glycol monomethyl ether. During preparation, under nitrogen protection, the following steps are performed sequentially: ethyl acetate pre-cleaning, aqueous isopropanol water-limited hydroxylation, two-stage single-terminated phosphate-based polyether anchoring, polyethylene glycol monomethyl ether sacrificial spacer treatment, washing, drying, and sieving. The resulting solder powder exhibits low total oxygen increment after 168 hours of open aging at 40°C and 75% RH. Solder paste made from this powder exhibits low viscosity drift, high spreadability, and low solder joint void ratio, making it suitable for high-reliability electronic assembly solder paste.

A welding wire for repairing bainitic steel frogs and its welding method are provided. The welding wire composition is as follows: C: 0.1-0.3 wt.%, Mn: 3.0-4.0 wt.%, Si: 2.0-3.0 wt.%, P: ≤0.03 wt.%, S: ≤0.03 wt.%, Cr: 1.0-2.0 wt.%, Nb: 0.3-0.5 wt.%, Ni: 0.1-0.3 wt.%, B: 0.3-0.5 wt.%, with the balance being Fe. The welding method is CO2 gas shielded welding. After each welding pass, 10-20% NaCl brine is poured onto the weld. After the previous weld pass is rapidly cooled to room temperature, the next repair welding pass is performed. This invention, through the pioneering and independent development of repair welding wire, combined with corresponding welding methods and control of welding parameters, can obtain the optimal weld structure; the repair welding area of ​​the fork is free of welding defects such as cracks, inclusions, and porosity; as the first research in China on the welding method for repair welding of bainitic steel rails, it has broadened its application in more fields, and no preheating is required before welding, and no cracks will be generated without post-weld treatment, resulting in good weld structure performance.

The present invention provides: oxide-containing copper particles which enable the achievement of a paste composition that is capable of forming a bonding layer having high denseness, high bonding strength and high bonding reliability; a paste composition which uses the oxide-containing copper particles; and a semiconductor device, an electrical component and an electronic component. With respect to oxide-containing copper particles according to the present disclosure, the absorption spectrum as measured with a spectrophotometer by dispersing the oxide-containing copper particles in ethanol that has a mass of 1 × 106 times the mass of the oxide-containing copper particles has an absorption peak within the wavelength range of 600 nm to 1,000 nm.

A submerged arc welded joint in a high-Mn content steel material is provided that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the welded joint, the high-Mn content steel material has a chemical composition including, by mass%, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and 0: 0.0050% or less, the balance being Fe and incidental impurities; and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.

The application belongs to the technical field of metal material processing, and particularly relates to a rare earth magnesium composite type ultra-high strength steel wire for additive manufacturing and a preparation method thereof. In view of the problems of high alloy element burning loss rate, grain coarsening and interlayer crack of traditional low alloy ultra-high strength steel in the electric arc additive process, through magnesium-yttrium compounding, the nanoscale Mg-Y precipitated phase and Y2O3 inclusions formed under high cooling speed in the electric arc additive process can improve the strength of the accumulated body and refine the grains. The low-frequency pulse arc is matched with the dendrite growth rate, and the gradient heat treatment is combined to eliminate the residual stress. The tensile strength of the structural part prepared by the electric arc additive process reaches more than 1650 MPa, the elongation is higher than 8%, the impact energy at-40 DEG C is more than 50 J, and the oxygen and hydrogen element contents are lower than 20 ppm and 1.5 ppm respectively. The application is suitable for the fields of aerospace high-strength load-bearing parts and marine corrosion-resistant structural parts, and can significantly improve the performance of the additive manufacturing metal material.