46results about How to "Improve caulking ability" patented technology

The invention relates to an Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and a preparation method thereof. The components of the aluminum-based brazing filler metal are 7 to 13 percent by weight of Si, 5 to 11 percent by weight of Cu, 4 to 11 percent by weight of Zn, 1 to 6 percent by weight of Sn, 1 to 3 percent by weight of Ni, 0.02 to 0.3 percent by weight of Ce, 0.01 to 0.1 percent by weight of Sr, 0.01 to 0.2 percent by weight of Zr and the balance of Al. The process flow for preparing the aluminum-based brazing filler metal is that: pure aluminum is added into a graphite crucible and covered by flux for aluminum under the condition of 800 DEG C to 900 DEG C, and slag is removed after melting; the aluminum-based intermediate alloy of high-melting point elements and flux for aluminum are added at the same time, and melting, stirring and slag removal are carried out; the aluminum-based intermediate alloy of low-melting point elements is added under the protection of nitrogen, and melting and stirring are carried out; the mixture of argon and hexachloroethane is added to carry out refining, and standing and slag removal are carried out; the intermediate alloy of trace elements is added, and melting and stirring are carried out; secondary refining and slag removal are carried out; and under the protection of nitrogen, casting formation is carried out. The Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal has the advantages of low melting point, high strength, high toughness, high corrosion-resistant property and good wetting property and spreadability.

The invention relates to polybasic silver solder characterized in that the polybasic silver solder comprises, by weight, 12-28% of Ag, 37-49% of Cu, 1.0-3.0% of In, 0.5-2.5% of Ni, 0.001-0.1% of rare earth elements and the balance Zn, wherein the polybasic silver solder contains little precious metal of silver, and the content of the silver is reduced by about 20% compared with high-silver solder such as Bag40CuZnSn. Therefore, production cost is greatly reduced, and use amount of the precious metal of the silver is saved.

The present invention relates to a fluoride soldering flux without causticity of a soldering 6063 aluminum alloy and the method of preparation, which belongs to soldering material field of the aluminum and the aluminum alloy. The compounding ratio of the component by the weight percent is: the neutral QF soldering flux: 99.0 to 99.7 percent; ZnSiF6: 0.3 to 1.0 percent. The neutral QF soldering flux is prepared by adopting the chemical synthesis, and the ratio of K+/A13+ is 1.9175, and the melting point of the soldering flux is 560 DEG C, and the soldering temperature is 580 to 620 DEG C. The soldering flux protects the soldering 6063 aluminum alloy in the stove by cooperating the AI-11.7Si eutectic soldering material nitrogen gas. The length of the clearance with the same clearance of the soldering material is more than 160 mm. The obverse and inverse surfaces of the soldering clearance are of good shaping with even welding root, and have no disadvantages of air holes on the surface and claming dregs. The cutting intensity for the soldering is more than 120 MPa. The soldering flux preparation art and the material of the present invention have low price, and do not absorb the damp. The present invention does not loose the efficiency when stored in the atmosphere for a long time, which is suitable for being widely applied.

The invention relates to a low-silver-copper-phosphorus brazing material containing trace indium. The low-silver-copper-phosphorus brazing material is characterized by comprising the following components in percentage by weight: 1.0-3.0% of silver, 6.7-8% of phosphorus, 0.05-0.2% of indium, 0.01-0.05% of mixed rare earth and the balance of copper, wherein the melting temperature range of the brazing material is 600-780 DEG C. The low-silver-copper-phosphorus brazing material has the advantages that the low-silver-copper-phosphorus brazing material can be used for replacing a BCu80AgP copper-based brazing material during brazing copper alloys, the content of the silver is reduced, the low-silver-copper-phosphorus brazing material has appropriate spreadability and liquidity, the low-silver-copper-phosphorus brazing material has appropriate liquidity during brazing copper and copper alloys, the brazing process is high in performance, stable in quality and smooth in surface, the technique performance index is equivalent to that of the Bag15CuP copper-based brazing material, and the brazing material can be prepared into various forms such as filaments, rings and strips by improving the molding technique.

The invention discloses a high-reliability cathode component for a vacuum electron device, wherein the ruthenium-vanadium binary alloy high-temperature cored solder taking refractory metal tungsten and molybdenum as base materials consists of the following materials in weight percentage: 23 to 40 percent of vanadium, and the balance being ruthenium and inevitable micro impurities; and the contents of Zn, Pb, Bi and Mg elements in the micro impurities are no more than 0.001 percent respectively. The cored solder can be used to braze-solder refractory metal w, Mo and alloy of w or Mo in the H2 or Ar gas atmosphere or in a vacuum state, the cored solder does not absorb hydrogen, can spread over base metal, and has good wettability; the wet angle is less than 10 degrees; and when a soldering piece is soldered under the vacuum working condition with a temperature of between 1,000 and 1,200 DEG C, the vapor pressure of the cored solder is lower than 1x10<-5>Pa; moreover, the cored solder is low in price, and is the first choice of solder replacing the Pt and Pt-based solder for the braze solder of the cathode component for the vacuum electron device, and the melting temperature of the cored solder is between 1,750 and 1,850 DEG C.

The invention discloses a low-silver copper-based solder free of a spillover phenomenon during a weld period. Aiming at the defect that the spillover phenomenon of the solder often occurs when brazing is performed by using traditional low-silver copper-based solder, the invention aims to provide the low-silver copper-based solder which is controllable in flowability and is free of the spillover phenomenon of the traditional low-silver copper-based solder during a process of welding copper and copper alloy. The low-silver copper-based solder disclosed by the invention is realized through the following technical scheme: the low-silver copper-based solder free of the spillover phenomenon during the weld period comprises the following components in weight percent: 6.6-7.8 percent of phosphorus (P), 0.5-2.2 percent of silver (Ag), 0.01-0.4 percent of indium (In), 0.001-0.2 percent of silicon (Si), 0.001-0.1 percent of rare earth and the balance copper (Cu).

The invention discloses a CVD (chemical vapor deposition) diamond brazing nickel-based alloy brazing sheet and a preparation method thereof. The CVD diamond brazing nickel-based alloy brazing sheet comprises the following components in weight percentage: 8.0-12% of Cr, 2.5-4.0% of Si, 1.5-2.0% of B, 7.8-11% of Sn, 0.4-1.0% of Ag, 0.1-1.0% of lanthanum neodymium, not more than 0.05% of impurities and the balance of Ni. The CVD diamond brazing nickel-based alloy brazing sheet overcomes the defects that the conventional Ag-based brazing material is high in cost and low in strength; the CVD diamond brazing nickel-based alloy brazing sheet contains Sn, so that the problems that the conventional Ni-Cr brazing material is high in melting point and poor in filling ability are solved; when the prepared nickel-based alloy brazing sheet is used for brazing a CVD diamond, the CVD diamond and the brazing sheet can form a chromium carbide compound, so that the bonding strength between the CVD diamond and the brazing sheet is high; the melting point of the brazing sheet is relatively low, so that heat damage to the CVD diamond is relatively small and the brazing sheet is easy to braze.

The invention belongs to the technical field of soldering materials, and particularly relates to a multi-layer flux-cored silver solder and a preparation method thereof. The multi-layer flux-cored silver solder comprises an inner core layer, a middle layer attached to the surface of the inner core layer and an outermost layer wrapped on the middle layer. The inner core layer is an alloy wire, the middle layer is a silver soldering flux layer, and the outermost layer is a silver-based solder metal skin. And the melting point of the alloy wire is lower than that of the silver soldering flux layer. According to the multi-layer flux-cored silver solder, the melting temperature of the alloy wire of the core part is lower than that of soldering flux, in the soldering process, the alloy wire is firstly melted and then adheres to the soldering flux, the soldering flux is driven to flow out in advance and permeate into a soldering seam, and therefore the seam filling performance and flowing performance of the soldering flux are improved. The problems that conventional flux-cored silver solder is poor in fluidity and not prone to seam crossing during soldering, and the soldering flux is accumulated on the front face during soldering are solved, and therefore the soldering effect is improved.

The invention discloses wetting-piloted composite solder which comprises a tin layer and a solder alloy layer, which are compositely rolled, wherein soldering flux layers are sprayed and deposited on the outer surfaces of the tin layer and the solder alloy layer respectively to form a finished composite solder product with a four-layer structure; the thicknesses of the tin layer and the solder alloy layer can be adjusted within 0.01-20 mm according to the clearance filling property of the solder and the size of a clearance; and the thicknesses of the soldering flux layers are adjusted within 0.01-10 mm according to the level of difficulty in removing an oxide film of a workpiece. During preparation of the composite solder, a tin belt and a solder alloy belt are put into a precision rolling machine to be compositely rolled so that the uniform-thickness tin layer is formed on the surface of the solder alloy layer, and then the uniform thickness soldering flux layers are deposited on the outer surfaces of the tin layer and the solder alloy layer in a hot spraying way to form the finished composite solder product with the four-layer structure. A preparation method provided by the invention saves energy and protects the environment, the composite solder is high in tin content and uniform in thickness and beautiful in forming, and since the composite solder has soldering flux, automatic, accurate and quantified addition of the soldering flux is realized during soldering.

The invention discloses a brazing filler metal-carried hard alloy block. The brazing filler metal-carried hard alloy block has a double-layer structure; and a brazing filler metal alloy layer is compounded on the lower surface of the hard alloy block. The thickness of the brazing filler metal alloy layer can be adjusted within 0.01-20 mm according to the size of a brazing filler metal filling gap. The brazing filler metal alloy layer is one of pure copper, copper base, silver base, manganese base, palladium base and titanium base brazing filler metal. During preparing, the brazing filler metal alloy is prepared as a coiled wire for future use by smelting, extruding and drawing procedures; the oil removal and the sand blasting are performed for the surface of the hard alloy block to guarantee no oil, no impurity and no oxidation on the surface to be welded; and then, the coiled wire-shaped brazing filler metal alloy is sprayed on the surface to the welded of the hard alloy block by thermal spraying equipment to form the brazing filler metal alloy layer with a certain thickness. The brazing filler metal-carried hard alloy block has the advantages of high assembly precision and convenience; as the thickness of the brazing filler metal layer compounded on the hard alloy block is controllable, the quantitative and precise adding of brazing filler metal is realized; and the hard alloy and the brazing filler metal interface form metallurgic bonding, so that the gap filling performance of the brazing filler metal to the hard alloy in the brazing process is improved.

The invention provides composite silver brazing welding paste. The composite silver brazing welding paste comprises components including 30-60 wt% of alloy welding powder, 10-30 wt% of brazing flux and 20-40 wt% of colloid. The alloy welding powder is composed of AgCu alloy powder and CuP alloy powder, wherein the mass ratio of the AgCu alloy powder to the CuP alloy powder meets the formula: AgCu:CuP=0.5-2. The invention further relates to a preparing method of the above welding paste. Starting from the brazing character of brazing filler metal, AgCu high-conductivity, high-heat-conduction andhigh-strength brazing filler metal and CuP high-wetability and high-joint-filling-capability brazing filler metal are guided, the component and grain size distribution combination design is adopted for the AgCu high-conductivity, high-heat-conduction and high-strength brazing filler metal and the CuP high-wetability and high-joint-filling-capability brazing filler metal, then, the colloid and thebrazing flux are added, and the composite silver brazing welding paste material is prepared through shearing emulsion machining. The composite silver brazing welding paste has the beneficial effectsthat the operation technology is simple, and feasibility is high; and the prepared welding paste material has good fluidity and high joint filling capability, and the characters of high conductivity,high heat conduction and high strength are kept after welding.

The invention relates to a ceramic tile joint filling device, in particular to a ceramic tile joint filling device for building decoration. The ceramic tile joint filling device for building decoration saves time and labor and is high in precision. The ceramic tile joint filling device for building decoration comprises a sliding rail, two first supporting rods, a shell, a storage tank and the like, the two first supporting rods are arranged in the middle of the inner side of the sliding rail in a sliding mode, and the shell is arranged between the tops of the first supporting rods; a material storage tank used for conveying the joint mixture into gaps between the ceramic tiles is arranged between the upper portions of the inner sides of the first supporting rods. The first motor is used as driving force to drive the rolling wheels to rotate so as to drive the storage tank to move left and right, meanwhile, the lead screw can be driven to rotate, the lead screw can drive the push block to move downwards so as to extrude a joint mixture in the storage tank downwards, the joint mixture falls into gaps between tiles, time and labor are saved, and the precision is high.

The invention belongs to the technical field of brazing materials, and discloses a nickel-based brazing material and a preparation method thereof. The nickel-based brazing material comprises the following chemical components in percentage by weight: 8-17% of Mn, 2-6% of Mo, 10-20% of Cr, 0.5-3% of Si, 2-10% of R and the balance of Ni and inevitable impurities. Wherein R is a rare earth element. Manganese and silicon in the brazing filler metal reduce the melting point of the brazing filler metal, meanwhile, silicon is added to improve oxidation resistance and fluidity, molybdenum is added to improve the wettability of the brazing filler metal to a weldment, rare earth is combined to further improve the joint filling capacity of the brazing filler metal, the toughness and strength of a brazed joint are improved, and the service life of the brazing filler metal is prolonged. And the problem of high brittleness of a brazed joint caused by the existence of silicon is solved. In addition, chromium can form an anti-oxidation layer, and the corrosion resistance of the brazed joint is improved.

The shoulder stone treatment equipment for road construction comprises a movable vehicle frame, a movable discharging mechanism is arranged at the top end of the movable vehicle frame, a supporting roller and a connecting shaft rotate to drive a transmission belt, a conveying rotating rod and a rotating disc to rotate, and a push plate is pushed to move back and forth in a piston drawing cylinder through cooperation of a connecting supporting plate and a rocking rod; the concrete temporary storage device is scientific and reasonable in structure and safe and convenient to use, through cooperation of a transmission belt, a connecting shaft can conveniently drive a conveying rotating rod and a rotating disc to rotate, through cooperation of a connecting supporting plate and a rocker, an assembly is formed, and the concrete temporary storage device is convenient to use and high in practicability. And the push plate is pushed to move back and forth in the piston extraction cylinder, so that concrete in the temporary storage cylinder is pumped into the piston extraction cylinder through the slurry extraction pipe and then is fed into the slurry conveying cylinder through the slurry discharge pipe.