22 results about "Magnesium alloy" patented technology

The present invention relates to a casting-rolling process of magnesium alloy slab and its equipment. Said process includes the following steps: preheating magnesium alloy ingot, smelting said magnesium alloy ingot in smelting furnace with protective gas; transferring the molten magnesium alloy to front tank by means of runner rough, relaining constant temperature in front tank, feeding the molten magnesium alloy into casting-rolling machine by means of lip to make casting and rolling operation, finally using fine rolling machine to make warm-rolling and cold-rolling so as to obtain the finished product plate material with required thickness. Its equipment mainly includes smelting furnace, runner trough, front tank, lip, on-line mixed gas supply device and casting-rolling machine.

An iron removing flux for Mg alloy contains magnesium chloride, potassium chloride, sodium chloride, calcium chloride, calcium fluoride and Ti (or Mn) compound. Its advantages are high effect on removing iron and other impurities from Mg alloy, high activity and low cost.

The invention relates to high-strength Mg-Y-Ni-Mn alloy and a manufacturing method thereof. The high-strength Mg-Y-Ni-Mn alloy comprises 5.0-12.5% of Y, 2.0-6.0% of Ni, 0.4-1.0% of Mn and the balance magnesium and inevitable impurities. The alloy is manufactured through the following process of material preparing, vacuum melting ingot casting, cyclic homogenizing annealing, extruding and double aging. Materials do not need to be refined; the extrusion ratio is low (lambda=11); the limitations that the manufacturing process of high-performance magnesium alloy is complex and the manufacturing conditions are rigorous are broken; the process is simple; transportability is high; operation is easy, the room temperature tensile strength and the yield strength of the alloy are obviously improved; the high-performance magnesium alloy can be directly produced under existing industrial conditions; the problem that the application of the Mg alloy is limited due to the poor mechanical performance of the Mg alloy is solved; and the application range of the magnesium alloy is expanded.

The invention relates to an electrolyte used for magnesium alloy anode oxidation treatment and a treatment method. The electrolyte comprises the following components of 20-60ml/L of polyaspartic acid salt, 40-100g/L of alkali metal silicate, 10-40g/L of boric acid or sodium tetraborate, 150-300ml/L of ammonia water or 50-200ml/L of organic amine and 20-60mg/L of sodium gluconate serving as additive, wherein the pH (potential of hydrogen) value of the electrolyte is 11-13. When the electrolyte disclosed by the invention is adopted for anode oxidation surface treatment on the magnesium alloy, one layer of smooth, even and compact ceramic layer with good corrosion resistance is formed on the surface of the magnesium alloy, the electrolyte can not pollute the environment and has a good favorable application prospect.

The invention discloses an organic corrosion inhibitor for inhibiting magnesium alloy corrosion and an application method of the organic corrosion inhibitor in an automobile cooling liquid or a corrosion aqueous solution. The corrosion inhibitor consists of the components in percentage by weight: 10-90 percent of pyrazine or/and piperazine and 10-90 percent of water or/and ethanol. According to the application method, the corrosion inhibitor is added into the automobile cooling liquid or the corrosion aqueous solution which immerses a magnesium alloy according to an adding amount of 50-1,000 ppm under a condition at the temperature of -50-90 DEG C. The using amount of the corrosion inhibitor disclosed by the invention is small; the corrosion inhibitor is high in corrosion inhibition efficiency and good in corrosion inhibition effect; under normal temperature, the corrosion inhibition rate can be over 90 percent. The corrosion inhibitor is organic, so that the common shortcomings of an inorganic corrosion inhibitor are overcome; the application temperature range is wide; the organic corrosion inhibitor is applicable to low temperature and normal temperature and can still effectively inhibit corrosion of the magnesium alloy in a solution medium with higher temperature, and the corrosion inhibition rate can be over 80 percent under the higher temperature. The corrosion inhibitor product disclosed by the invention has the advantages of simplicity in production, wide application range, no toxicity, no peculiar smell, complete water solubility, safety and convenience in operation, good economical property and the like.

A high-strength high-conductivity rare earth copper-magnesium alloy contact wire comprises, by weight percentage, 0.1-0.8% of magnesium, 0.1-0.4% of nickel, 0.1-0.4% of zinc, 0.1-0.4% of silver, 0.05-0.15% of a rare earth element and the balance copper and inevitable impurity elements, wherein the rear element is one or two of cerium and neodymium. When the rare earth element is added in the form that the cerium and neodymium are mixed, the weight ratio of the cerium and neodymium is 1:1-1:2. The high-strength high-conductivity rare earth copper-magnesium alloy contact wire overcomes the technical defect that the requirements on electrical conductivity and the tensile strength of a copper-magnesium alloy cannot be met at the same time in the prior art and can meet the performance requirement of the copper alloy for the railway contact wire.

The invention discloses a method for characterizing oxidation phase of a solid-phase regenerated AZ31B magnesium alloy. An as-cast blank of the AZ31B magnesium alloy is turned into ultrathin chips, and the ultrathin chips are placed in a chamber electric resistance furnace for oxidation treatment, heated slowly to 673 K in an air atmosphere and subjected to heat preservation for 2 h; the ultrathin chips subjected to oxidation treatment are loaded to a mold with the diameter being 40 m and subjected to cold pressing with a unidirectional pressure method, and a billet is formed, wherein process parameters of billet forming through cold pressing are as follows: pressure is kept at 350 MPa, and pressure is kept for 60 s; the mold loaded with the blank is placed into a heating furnace, heated to 673 K, subjected to heat preservation for 20 min and extruded at the extruding rate of 0.2 mm s<-1>, and a bar is obtained through machining; a microscopic structure is observed. The oxidation phase is observed successfully through an optical microscope and a scanning electron microscope.

The invention discloses a phosphorus-containing indoor-temperature high-plastic-deformation magnesium alloy which comprises the chemical components in percent by mass: 5.5-8.5 percent of Al, 0.4-1.5 percent of Zn, 0.1-1.0 percent of Mn, 0.05-1.0 percent of P and the balance of Mg and impurities. According to the phosphorus-containing indoor-temperature high-plastic-deformation magnesium alloy, a nonmetal element P is mainly added in an existing magnesium alloy smelting process, a stable and fine grain structure is obtained through the action of the nonmetal element P, the room-temperature plasticity of a magnesium alloy is improved, and the room-temperature processing and using requirements of a finished product or a semi-finished product are met.

The invention relates to an aluminum magnesium alloy welding flux and a preparation method of the aluminum magnesium alloy welding flux. The welding flux is prepared from, by weight, 5-6% of Mg, 0.08-0.12% of Cr, 0.1-0.2% of Fe, 0.1-0.2% of Si, 0.3 of Fe and Si, 0.01-0.05% of Cu, 0.03-0.05% of Zn, 0.1-0.15% of Mn, 0.08-0.12% of Ti, 0.1-0.2% of In, 0.01-0.015% of graphene, and the balance Al and inevitable impurities. According to the aluminum magnesium alloy welding flux, by optimizing raw material composition and adding In and graphene, the strength and wettability of the welding flux are effectively improved, and therefore the welding flux has good welding performance.

It is a magnesium alloy surface treatment methods, including the following steps. Step one : treating the surface of magnesium alloy material using dry sandblasting machine with natural sand; Step two: cleaning the surface of magnesium alloys with water; Step three: drying magnesium alloy materials; Steps four : Sputtering a stainless steel vacuum layer on the surface of magnesium alloy materials; Step five: Sputtering a copper layer on the stainless steel vacuum layer; Step six : immersing the magnesium alloy into the plating solution, flash plating with a certain voltage for a period; Step seven: Magnesium Alloys will be immersed in electroless nickel solution by chemicals plating. This invention combined the vacuum sputtering and chemical plating,with electroless nickel plating after sputtered stainless steel and copper layers. This technics, with simple operation but excellent performance, greatly improves the corrosion resistance and wear resistance of magnesium alloy and is relative environment friendly.

A process for the treatment or pretreatment of containers made of aluminum, aluminum-containing alloys, magnesium-containing alloys, iron-containing materials such as steel, coated iron-containing materials such as galvanized steel, or aluminum alloys, tinplate, brass or bronze, in particular the treatment or pretreatment of bags, tubs, bottles, cans, canisters, casks or tubes, wherein the process steps for the treatment or pretreatment take place at the same time as the application of the lubricant, with the agent used for the pretreatment or treatment, which also contains or is a lubricant, not essentially consisting of titanium or zirconium with fluoride and polymer, the lubricant possibly being formed first in the agent for the pretreatment or treatment or in the formation of the coating produced therefrom.

The invention discloses an aluminum-magnesium alloy electroplating solution which is composed of 20-35 g/L nickel sulfate, 15-25 g/L chromic sulfate, 15-35 g/L copper sulfate, 1-5 g/L cobalt acetate, 50-80 g/L tetrahydrothiazolyl thione, 10-20 g/L citric acid, 1-5 g/L ascorbic acid, 10-40 g/L sodium oxalate, 40-50 g/L sodium borate, 20-35 g/L potassium citrate and the balance of deionized water. The aluminum-magnesium alloy electroplating solution can solve the problem of high corrosion tendency of the aluminum-magnesium alloy in the electroplating construction, and can enhance the binding force of the coating.

The invention discloses a rod-needle separated magnesium alloy slim tube preparation device and method, and belongs to the technical field of metal materials and machining thereof. The device mainly comprises an extrusion rod, an extrusion needle, an extrusion needle pad, an extrusion female die, a female die pad, an extrusion cylinder, a fixing sleeve, an extrusion die holder and a demoulding frame, wherein the extrusion rod is separated from the extrusion needle, the extrusion needle can freely move to a certain degree in the extrusion cylinder in the extrusion process, automatic centering is achieved, the pipe size precision is improved, the extrusion needle and the extrusion female die can be replaced at any time, and the diameter and wall thickness of the tube are controlled by adjusting matching of the extrusion needle and the extrusion female die. The magnesium alloy slim tube prepared through the process is uniform in structure, excellent in mechanical property, good in surfacequality and accurate in size; and the device is simple, low in machining cost, high in efficiency, high in material utilization rate and capable of achieving mass production.

The invention discloses a preparation method of a titanium/aluminum/magnesium composite plate. The method comprises the following steps: by taking a titanium alloy plate and an aluminum alloy plate as flying plates and a magnesium alloy plate as a base plate, polishing the aluminum alloy plate and the titanium alloy plate, and sequentially stacking the aluminum alloy plate and the titanium alloy plate on the polished magnesium alloy plate; and placing an aluminum support between adjacent plates in the magnesium alloy plate, the aluminum alloy plate and the titanium alloy plate, then coating a plastic film on the surface of the titanium alloy plate back to the base plate, laying an explosive on the plastic film, placing a detonator in the explosive, igniting the detonator to detonate the explosive for explosive welding, and obtaining the titanium/aluminum/magnesium composite plate. According to the method, the titanium/aluminum/magnesium composite plate is prepared by adopting the explosive welding method, so that good combination is formed at interlayer interfaces of the plates, and the titanium/aluminum/magnesium composite plate is prepared in an extremely short time, so that oxides are not easy to form at combination interface of the magnesium alloy plate, and the mechanical property of the titanium/aluminum/magnesium composite plate is improved.

The invention provides a heat dissipation plate of an electric automobile battery pack. The heat dissipation plate comprises a magnesium aluminate oxide anticorrosion layer, an aluminum magnesium alloy metal plate, a first carbon nano tube modified ethylene-vinyl acetate copolymer adhesive layer, an aluminum foil layer, a second carbon nano tube modified ethylene-vinyl acetate copolymer adhesive layer, a heat dissipation type polyester thin film, a third carbon nano tube modified ethylene-vinyl acetate copolymer adhesive layer and a battery electrode connection plate. The invention further provides a battery pack containing the heat dissipation plate of an electric automobile. The heat dissipation plate of the electric automobile battery pack is excellent in heat dissipation performance and is favorable for reducing temperature in the electric automobile battery pack and prolonging the service life of a battery.

The invention discloses an extrusion processing method of magnesium alloy AZ91D internal threads, and belongs to the field of material extrusion thread processing methods. The extrusion processing method solves the problem that the magnesium alloy extrusion thread processing technology is difficult. The extrusion processing method comprises the steps that after machining is conducted on a magnesium alloy AZ91D cast ingot, so that a magnesium alloy AZ91D bar material is obtained; the magnesium alloy AZ91D bar material is placed in the middle of an inner cavity of a die, and the two ends of thedie are tightly screwed and fixed in a threaded mode; then the die is put into a box type resistance furnace, and after the temperature is risen to range from 380 DEG C to 440 DEG C, the temperature is kept for 16-22 hours; after water cooling is accomplished, the bar material is clamped on the working plane of a machining center, and a hole position is formed in the center through drilling; a 45-degree chamfer is processed in a hole opening of a bottom hole, so that the magnesium alloy AZ91D bar material with the preformed bottom hole is obtained; and the magnesium alloy AZ91D bar material with the preformed bottom hole is processed by an extrusion tap in an extrusion mode under the condition of lubrication of an emulsion, the concentration of the emulsion is 6%, and the rotating speed ofa main shaft in the thread extrusion process is controlled to range from 30r/min to 80r/min, so that the magnesium alloy AZ91D internal threads are obtained. Compared with threads formed by cutting,the magnesium alloy AZ91D internal threads have the advantages that the tensile strength is increased by 20%-30%, and the shear strength is increased by 5%-10%.

The invention discloses a forming die of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming. The forming die comprises an upper die seat, a male die and a female die, wherein the male die is a cylinder and is vertically installed on the upper die seat; the female die is arranged below the male die, is of an inverted "T" shape and is formed by communicatinga vertical cavity and a horizontal cavity with the same diameter; in addition, a spherical cabin is formed in the intersection part of the vertical cavity and the horizontal cavity, small circular beads are respectively arranged in the joint of the spherical cabin and the vertical cavity and the joint of the spherical cabin and the horizontal cavity, and the vertical cavity is used for accessing the male die. A bidirectional equal channel extrusion structure formed by the vertical cavity and the horizontal cavity is adopted, the spherical cabin is arranged in the channel joint, the compound superposition of the shear deformation in a cavity corner and the heading extrusion deformation in the spherical cabin during a material extrusion process is realized, accumulated plastic deformation process of a material is reached, refinement of a microstructure of a Mg-Gd-Y-Zn-Zr magnesium alloy blank is finally realized, and the mechanical property of an alloy is promoted.