204 results about "Aluminium bronze" patented technology

The invention discloses an electron beam welding method for dissimilar materials of a nickel-aluminum bronze alloy and a TC4 titanium alloy, belongs to the field of dissimilar material fusion welding, and aims to solve the problem that an intermetallic compound layered structure is easily produced in the electron beam welding of the dissimilar materials of the nickel-aluminum bronze alloy and the TC4 titanium alloy. Different from the conventional welding method, the electron beam welding method is performed on the abutting surfaces of the TC4 titanium alloy and the nickel-aluminum bronze alloy respectively by deviating a certain distance to a nickel-aluminum bronze alloy side by using a superposition welding method. On the one hand, excellent metallurgical bonding can be formed on the welding line of the TC4 titanium alloy and the nickel-aluminum bronze alloy, and a joint does not have any welding defects, such as pores, cracks and the like; and on the other hand, the intermetallic compound layered structure formed by the welding line and the nickel-aluminum bronze alloy side can be weakened or eliminated, and continuously distributed weld microstructures can be obtained, so that the tensile strength of the joint can be improved to over 70 percent of that of the mother metal of the nickel-aluminum bronze alloy. The welding method in the invention is suitable for welding the conventional plate-like and tubular mother metals.

The invention provides a pipe corrosion-resistant multielement aluminium bronze alloy material and the ingredients are as follows: 4.0 to 10.0wt percent of Al, 1.0 to 4.5wt percent of Fe, 1.0 to 4.5wt percent of Mn, 0.8 to 4.0wt percent of Ni, 0.05 to 0.5wt percent of Cr and the balance of Cu and unavoidable impurities; in casting state, the tensile strength is more than 385MPa, the yield strength is more than 180MPa, the yield ratio is more than 0.48, and the specific elongation is more than 27 percent; in annealing state, the tensile strength is more than 525MPa, the yield strength is more than 285MPa, the yield ratio is more than 0.55, the specific elongation is more than 42 percent and the complete immersion uniform corrosion rate is 0.01 to 0.035mm / a; the copper alloy has excellent performance, is particularly suitable for the environment with high flow rate of seawater and is an ideal material for manufacturing sea water desalinating condenser equipment, shipping sea water condenser equipment and seashore power plant condensers.

The invention provides a compounding method of a steel-aluminum bronze bimetal plate. The method comprises the following steps of: annealing for lowering the strength of steel and aluminum bronze respectively to increase the plastic deformation capability; thermally dipping a layer of pure aluminum on a steel surface at a temperature which does not surpass a eutectoid transformation temperature; compounding aluminum-plated steel with aluminum bronze by performing cold rolling at one time at a large deformation amount; performing liquid phase diffusion annealing in a temperature range which is higher than the melting point of aluminum and lower than steel eutectoid transformation temperature; performing warm rolling immediately after diffusion annealing; finely rolling to a required size of a finished product, and flattening a plate surface; and performing stress relief annealing at last. Due to the adoption of the compounding method, the adverse effect of residual of a pure aluminum layer on an interface can be avoided, and the interface bonding performance of a steel-aluminum bronze bimetal material is improved greatly.

The invention relates to a material for laser cladding of an albronze surface and a laser cladding method. The material is composed of 25% to 35% by weight of Cu, 11.5% to 14.5% by weight of Cr, 2.0% to 3.0% by weight of Zr, 2.5% to 3.5% by weight of B, 2.5% to 3.0% by weight of Si, 5.5% to 6.5% by weight of Fe, and the balance Ni, the above materials are 100 to 300 mesh powder; the method comprises the following steps: preparing the materials in the above proportions, uniformly mixing the prepared materials, weighting the alloy powder in 0.02g to 0.08g per square millimeter according to the area of the laser cladding, presetting the alloy powder on the albronze surface by acrylics, compacting after vacuum drying (40 DEG C to 70 DEG C), scanning the preset layer by gradually reducing laser power with a speed of 6 to 8 millimeters per second and a spot diameter of 4 millimeters.

The invention provides a layer-by-layer analysis method for a surface layer of a copper alloy material, comprising the steps of: selecting a glow discharge ion source and a mass spectrum analysis condition to carry out sample treatment and sample analysis; peeling an analyzed sample by utilizing the glow discharge ion source under the action of cathode sputtering; recording a continuous change signal of analyzed sample mass spectrum peak strength along with the time in a high-sensitivity mass spectrometer system in real time; and converting the continuous change signal into change of the chemical composition of the sample along with the depth by using a composition and depth double-calibration method so as to finish the layer-by-layer quantified analysis of the surface layer of an aluminum bronze membrane sample on a brass base material. In the invention, proper analysis parameters such as argon pressure, discharge voltage, sample sputtering spot surface diameter, sample measurement time and the like are selected to improve interlayer resolution to be thousands of nanometers, so that the ultrathin layer-by-layer analysis of the surface layer of bronze on the brass base material is realized.

The present invention discloses an establishment method for a high aluminum bronze coating property forecasting model and an optimization method for a single property indicator of a high aluminum bronze coating. The establishment method for the forecasting model comprises: establishing a training sample and a testing sample; constructing a BP neural network model; optimizing a weight and a threshold of the BP neural network by using the training sample and by using a genetic algorithm; and testing, by using the testing sample, the BP neural network model optimized by using the genetic algorithm, to obtain the high aluminum bronze coating property forecasting model. The optimization method is to perform extremum optimization on a single property indicator of a high aluminum bronze coating by using the forecasting model and the genetic algorithm. The high aluminum bronze coating property forecasting model established by the method provided by the present invention is high in forecasting accuracy, and implementing the high aluminum bronze coating property forecasting model greatly improves efficiency in researching a high aluminum bronze coating and making research and development of the high aluminum bronze coating become more directional and forward.

A metal bonded drilling and boring tool which can prevent the separation of abrasive grains during drilling and boring to maintain a stable working performance for a long period of time without the need for tool exchange. The tool includes a rod-shaped body having a substantially semispherical front end portion and numerous abrasive grains bonded to an outer circumferential surface of the rod-shaped body at the front end portion and at a portion having a given length from the front end portion by a bond member formed primarily of copper alloy. The bond member contains a material selected from the group consisting of Ti, Al, and a mixture thereof. The copper alloy is selected from the group consisting of bronze containing 10 to 33 wt % of Sn, brass containing 5 to 20 wt % of Zn, and aluminum bronze containing 5 to 20 wt % of Al.

The invention relates to a covering agent used for vertical semi-continuous casting of aluminum bronze and application thereof. The covering agent consists of the following components in percentage by weight: 40 to 70 percent of cryolite, 2 to 10 percent of phosphor copper master alloy and the balance of charcoal ash, wherein the summation of the percentage by weight of each component is 100 percent. When the covering agent is applied to the vertical semi-continuous casting of the aluminum bronze, a 'thin covering' technique is adopted, namely a round porous mesh screen is fixed on a crystallizer, the cover agent is placed in the mesh screen, and during casting, along with the vibration of the crystallizer, the powdered covering agent in the mesh screen is uniformly scattered on the surface of a fused mass, and the covering thickness is only 0.5 to 2 mm. The covering agent not only can reduce the defects of slug inclusion on an ingot casting surface layer, gas holes, cold shut and the like, but also can reduce the depth of the slug inclusion in an ingot, so the ingot surface quality is high, the finished product rate is improved by 10 to 40 percent, and the ingot has high mechanical properties. When applied to the casting of the aluminum bronze, the covering agent can also improve the production efficiency of casting of the aluminum bronze by 15 to 35 percent, and prolong the service life of the crystallizer by 50 to 80 percent. The covering agent is simple and convenient to prepare, has a low use cost, and is simple for production operation.