292 results about "Zinc based alloy" patented technology

A process and device are disclosed for precipitating solid compounds from the liquid zinc or liquid zinc-based alloys of a metal bath. According to the disclosed process, partial amounts of the metal phase containing the compound(s) are exposed to an acceleration higher than the acceleration due to gravity and at least partially dissociated thereby into fractions containing heavier and/or lighter components. The molten mass depleted of solid compounds is returned to the metal bath and the part of the molten mass enriched with the desired compounds is discharged. The disclosed device is substantially characterized in that a hollow rotary body (2) is introduced into the molten mass (1). The hollow rotary body (2) can be driven about an axis and is fitted in the submerged or lower area with conveyor means (21) which project into the cavity. In its discharge or upper area, the hollow rotary body (2) is provided with at least one discharge opening (23) for the depleted molten mass (14) eccentrically arranged in its wall and with at least one further discharge opening (25) for the liquid metal enriched with the desired compounds centrally arranged and/or eccentrically arranged on the discharge side. At least one of the upper molten mass discharge openings (23, 24) in the rotary body (2) opens into a discharge area of a housing (3) which at least partially surrounds the rotary body (2).

Outer steel sheet-viscoelastic core laminates are often subject to corrosion in moisture-containing environments. Zinc-based alloys of aluminum, or of aluminum and magnesium, may be beneficially applied to the inner faces of the steel sheets or to both the inner and outer sheet faces. Substantially pure zinc coatings may be applied over the zinc-based alloys or over an otherwise bare outer steel sheet surface. Combinations of such zinc-based alloy coatings and substantially pure zinc coatings improve the corrosion resistance of the steel sheet-polymer core laminates while maximizing weldability and paintability.

The present invention relates to process of making zinc-base alloy wire and rod with high strength and high toughness. The production process includes the steps of providing zinc-base alloy material with Al content not less than 10 wt%, smelting, heat preservation and extruding at 300-450 deg.c, drawing, heat treatment at 150-300 deg.c for 30-120 min, and quenching. The production process can obtain zinc-base alloy wire and rod of different sizes for producing various mechanical parts, such as screw, nut, pull rod, wire, etc.

The invention relates to a degradable zinc-based alloy bracket and a preparation method thereof. The bracket includes a degradable zinc-based material bracket substrate; the surface of the bracket substrate is provided with a degradable polymer eluting coating containing treatment drug; the bracket substrate is a cylindrical mesh structure. The preparation method includes: 1) processing the degradable zinc-based material to be a bracket substrate; 2) performing the surface pretreatment on the bracket substrate; 3) performing electrochemical polishing treatment on the bracket substrate; 4) after the treatment, coating a degradable high polymer material carrying with treatment drug on the surface of the bracket. For the substrate material zinc alloy has excellent corrosive resistance, the bracket provided by the invention keeps good supporting property after implanting for 4 months above; the substrate surface is coated with the polymer coating with good biocompatibility, thus the improved compatibility of the zinc-based alloy is good for the coverage of endothelial cells at the surface of the bracket; the drug release can be controlled, and drug burst release is reduced, so that the drug can be released slowly and sustainably with a certain concentration, so as to reduce the local inflammation, restenosis and stent thrombosis risk after implanting the bracket.

The invention relates to an alloy austenitic-bainite ductile iron worm gear and a preparation process thereof. The worm gear comprises the following components in percentage by weight: 3.5 to 3.9 percent of C, 2.3 to 2.9 percent of Si, less than or equal to 0.4 percent of Mn, less than or equal to 0.035 percent of P, less than or equal to 0.03 percent of S, 0.2 to 0.3 percent of Mo, 0.3 to 0.6 percent of Cu, 0.2 to 0.5 percent of Ni and the balance of iron. The preparation process comprises the following steps: smelting the components, taking a rare earth magnesium alloy as a spheroidizing agent and ferrosilicon as an inoculating agent, and casting a blank after treatment; roughly machining the blank of the worm gear, heating and isothermally quenching to obtain a proper amount of retained austenite; and finishing a gear to prepare the alloy austenitic-bainite ductile iron worm gear. The worm gear has the advantages to high fatigue resistance, high pitting resistance, lower density than steel, small deformation and the like, and is suitable for replacing a worm gear on a valve electric actuator made of a copper alloy or zinc base alloy (ZA27) so as to obviously reduce production cost.

The invention provides a fine-grained zinc-based alloy for a die and a preparation process thereof. The invention is characterized in that the fine-grained zinc-based alloy for the die is composed of a matrix alloy, intermediate alloys, an alterant and a scouring agent and comprises 12.5 to 16.5% of Al, 8 to 12.5% of Cu, 0.01 to 0.05% of Mg, 0.10 to 0.25% of Ti, 0.01 to 0.03% of B, 0.3 to 0.7% of Zr, 1 to 3% of Si, 0.4 to 0.8% of Mn, 0.2 to 0.8% of Re and 0.4 to 0.5% of ZnCl2, with the balance being Zn, wherein Re comprises, by mass, 45 to 55% of Ce, 10 to 20% of La, 7 to 15% of Y and 4 to 10% of Gd. The preparation process comprises the following steps: fusing the alloys in a crucible resistance furnace or a medium-frequency induction melting furnace; preparing a semi-solid zinc-based alloy through electromagnetic stirring; carrying out casting after temperature drops to 550 DEG C; and carrying out water cooling or air cooling. Compared with the prior art, the invention has the following advantages: the fine-grained zinc-based alloy for the die has the following mechanical properties at normal temperature, i.e., sigma b of 492.6 MPa, delta s of 1.42% and HBR of 168; even at a high temperature of 200 DEG C, sigma b reaches 216 MPa and delta s reaches 26%, completely according with the requirement of a common injection die for the mechanical property sigma b of 120 to 150 MPa at the temperature of 200 DEG C.

The invention provides a degradable corrosion-resistant high-toughness Zn-Fe-X zinc alloy for a human body and application thereof and relates to the field of medical implant materials. The zinc alloy contains a Zn element, a Fe element and an X element, wherein the X element is at least one of Mg, Ca and Sr, the mass percent of Zn element is 89.92-99.997%, the mass percent of Fe element is 0.002-10%, and the mass percent of X element is 0.001-0.08%. According to the zinc alloy provided by the invention, the cost of added materials is low, degradation products of all ingredients of a prepared alloy material can be degraded through human body metabolism, the corrosion resistance is far higher than that of a magnesium alloy, the degradation rate is greatly lowered, a longer-time mechanical support can be provided, and the strength and toughness of the alloy material are good.

A wheel balance weight includes a weight and an installation member. The weight is composed of at least one member selected from the group consisting of zinc and a zinc-based alloy, is formed as a substantially strip shape having a substantially uniform thickness, and has opposite surfaces and at least a groove. The groove is formed in at least one of the opposite surfaces of the weight, and crosses in the width-wise direction of the weight. The installation member is adapted for installing the weight to a rim in a wheel. Since the weight is composed of zinc or a zinc-based alloy, environments are inhibited from being polluted when the wheel balance weight is abolished. Moreover, it is possible to manufacture the wheel balance weight at reduced costs and install it to wheels with ease.

The invention relates to a casting method and a device for ingot metal such as aluminum, silver, zinc and zinc-based alloy ingot. The invention adopts the method that the molten metal is cast into an ingot mold at first, then at least one surface of the ingot is heated and insulated during the solidification process, to ensure that the cooling speed thereof is greatly reduced and less than that of the other surfaces of the ingot, and the heating is not stopped until the volume of the molten metal in the center of the ingot during the cold shrinkage process is fully compensated by the molten metal on the surface. The device comprises a casting mechanism and a die, the die adopts a vessel with an opening, an insulating cover for covering the opening is also arranged on the die, and a heating device is arranged in the insulating cover. The invention can be used for ingot metal such as aluminum, silver, zinc ingot, zinc-based alloy ingot and the like cast by the die with the opening. The invention ensures that the volume of the surface can be compensated till the volume everywhere in the ingot metal is completely filled and shrunk through delaying the hardening time of one surface of the ingot metal; therefore, the influencing factors of formation of the internal shrinkage hole are radically eliminated, and the effect of eliminating the internal shrinkage hole is realized.

The invention discloses a high-strength easy-cutting zinc-based alloy and preparing method, which comprises the following parts: 2. 5-2. 65% copper, 0. 45-0. 60% magnesium,0. 20-0. 35% aluminium,0. 01-0. 06% lanthanum,0. 15-0. 20% cerium, and residual zinc. The invention affirms the strength and cutting property of alloy effectively, which saves power and simplifies the technique.

The invention relates to an alloy film, in particular to an anticorrosive alloy plated film. The invention also relates to a preparation method of an alloy. An alloy sacrificial anode film for preventing stress corrosion cracking is made of an aluminum, magnesium, titanium and rare-earth element-containing zinc-based alloy. As a CPF metal coating of the invention has triple corrosion prevention forms different from the conventional corrosion prevention form by using a single metal, namely a capture effect, a self-sealing effect and a static bed effect, the alloy sacrificial anode film has the corrosion prevention effect (making the best use of the circumstances) different from the past. Simultaneously, as the bonding of a metal thermal spray coating and a steel substrate is semi-molten metallurgical bonding and mechanical bond bonding, the bonding force is greater than that of an organic coating and the steel substrate. By adopting a special sealing agent, the alloy sacrificial anode film can bear a potential voltage of -1.33v, and has high oil resistance, high alkali resistance and high adhesion, and does not generate cathodic disbanding due to bubbling caused by OH<-> or H<+> generated by cathodic reaction under the coating.

Provided are a method of manufacturing an aluminum-zinc-based alloy sheet using twin-roll casting and an aluminum-zinc-based alloy sheet manufactured thereby. Specifically, a method of manufacturing an aluminum-zinc-based alloy sheet, including preparing a melt by melting elements corresponding to an aluminum alloy including 0.5 wt % to 10 wt % of zinc, inevitable impurities and aluminum as a balance (step 1); and twin-roll casting by introducing the melt prepared in step 1 between a pair of rotating cooling rolls (step 2), and an aluminum-zinc-based alloy sheet manufactured thereby are provided.

The present invention may manufacture an aluminum-zinc-based alloy sheet, in which twin-roll casting is known to be difficult due to a wide solid-liquid coexistence region, by twin-roll casting by using cooling rolls having high thermal conductivity and controlling a reduction force by the rotational speed of the rolls.

A non water-soluble and zinc based nanoanticorrosion coating material is prepared by using flaky zinc powder or zinc based alloy powder as raw material; adding trace amount of nanometal powder material; using lipid and alcohol as solvent; adding resin, coupling agent, floatting agent and curing agent of amine for forming solvent type of nanoanticorrosion paint. The prepared coating material can be used as both of basic paint or surface paint with strong adhesive force, metal gloss and decorative function.

A surface-treated sheet for fuel tanks includes a cold-rolled steel sheet with a low carbon content, a zinc or zinc-based alloy plating layer formed on the steel sheet, and a chromate film coated on the zinc or zinc-based alloy plating layer. The chromate film is formed from a chromate solution. The chromate solution includes a subject solution and an aqueous silane solution in an amount ranging from 5 to 50% by weight of the subject solution. The subject solution contains a chrome aqueous solution where the concentration of chrome is in the range of 5-50 g/l and the ratio of trivalent chrome to the chrome content is in the range of 0.4 to 0.8. Phosphoric acid in an amount ranging from 20 to 150% by weight with respect to the chrome content, fluoric acid in an amount ranging from 10 to 100% by weight with respect to the chrome content, colloidal silica having pH of 2-5 in an amount ranging from 50 to 2000% by weight with respect to the chrome content, and sulfuric acid in an amount ranging from 5 to 30% by weight with respect to the chrome content are mixed with the chrome aqueous solution. The aqueous silane solution contains 2-10 wt % of Epoxy-based silane and has a pH of 2-3. A resin coating layer is formed on one side or both sides of the chromate film. The resin coating layer is formed from a resin solution. The resin solution includes a phenoxy resin solution having a molecular weight of 25,000-50,000, colloidal silica of 10-20 phr with respect to the phenoxy resin content, and melamine resin of 2-15 phr with respect to the phenoxy resin content.

The invention relates to a preparation method for zinc-based alloy specially-shaped tube. The preparation method for zinc-based alloy specially-shaped tube comprises the following steps of: (1) establishing a constitutive equation and a working diagram by adopting a high-temperature compression test, so as to obtain deformation conditions suitable for processing zinc alloy; (2) performing a finite element numerical simulation on zinc alloy porthole die extrusion, so as to optimize die structure and extrusion process; (3) heating a zinc alloy ingot blank in an induction furnace, and then performing hot extrusion by selecting the optimized die structure and process parameters, so as to obtain a specially-shaped tube blank with an approximate final size; (4) performing fixed short core rod pulling, so as to obtain the specially-shaped tube with a finished size; (5) performing cleaning and heat treatment; and (6) straightening, so as to obtain the finished tube. The method disclosed by the invention is short in process, high in material utilization rate, low in cost, high in added value, and suitable for large-scale production; and the prepared zinc-based alloy specially-shaped tube can be used for replacing a part of brass specially-shaped tubes, plays a promotion role on relief for the copper resource shortage of China to a certain extent, and has economic benefits and social benefits to a certain extent.

The invention relates to plating solution for continuous hot dipping of steel strips and a dipping method thereof. The plating solution for continuous hot dipping of steel strips disclosed by the invention comprises 0.5-5wt% of Al, 1-4wt% of Mg, and the balance of Zn and inevitable impurities, wherein the contents of Al and Mg meet the following conditions: (Al+Mg)/Mg is 1.70-2.30. The plating solution for continuous hot dipping of steel strips and the dipping method thereof provided by the invention are suitable for the hot dipping of different varieties of steel strips, and moreover, the corrosion resistance of the zinc-based alloy plating layers prepared by virtue of the plating solution can be greatly improved.

The invention discloses a corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy capable of being degraded in a human body and an application of the corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy, relates to field of medical implantation materials, and provides the corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy which is low in cost of added materials, high in strength, good in plasticity and controllable in degradation rate, has non-expanding and non-migrating degradation products and can be simultaneously degraded in the human body against the defects in the prior art. The zinc alloy comprises Zn, Fe and Li elements, wherein the content of the Zn element in mass percentage is 80-99.997%, the content of the Fe element in mass percentage is 0.002-10%, and the content of the Li element in mass percentage is 0.001-10%. The cost of the materials added into the zinc-based alloy disclosed by the invention is low, the degradation products of various components in the prepared alloy material can be degraded in the human body by metabolism, the corrosion resistance is much higher than that of a magnesium alloy, the degradation speed is greatly reduced, the mechanical support can be provided for a longer time, and the alloy material has good strength and toughness.

The present invention relates to the field of medical materials, and provides an implantable metal material capable of being degraded in vivo. The invention discloses a multi-element zinc alloy comprising Zn, Cu, Ti, Mg and the like, wherein the multi-element zinc alloy comprises, by mass, 0-4.5% of Cu, 0-1.5% of Ti, 0-1.5% of Mg, and the balance of Zn, and can further contain 0-2% of Mn, 0-3% of Ag and the like, wherein Mg, Cu and Mn are essential elements of human body, and Ti and Ag are non-toxic elements, such that the introduction of toxic alloying elements is avoided. According to the present invention, the multi-element zinc-based alloy is prepared by selecting the high-purity raw material or intermediate alloy, the high-performance billet is obtained through processing, and the obtained product has advantages of good mechanical property, uniform corrosion and strong controllability, can meet the requirements of medical devices on safety and mechanical property, can be used in vascular stents, lumen stents, orthopedic implants, surgical suture devices and other devices, and is preferentially used for preparing degradable stents for the interventional therapy of coronary heart diseases and the temporary supporting of body lumens stenosis.

The invention relates to a method for preparing zinc base alloy, comprising the following steps: firstly respectively preparing Al-Cu alloy, Al-Mn alloy and Al-Ti-B alloy; and then adding the Al-Cu alloy, the Al-Mn alloy, the Al-Ti-B alloy, rare-earth metal and metal Mg into molten metal Zn; after all the substances are melted, slagging, slagging off, casting to form an ingot, and cooling to obtain the zinc base alloy, wherein the Re in the zinc base alloy Zn-Al-Mg-Cu-Re-Mn-Ti-B is the rare-earth metal. By utilizing the preparation method provided by the invention, the temperature can be effectively lowered, thus lowering the requirements on energy and equipment; and meanwhile, the zinc base alloy prepared by the preparation method provided by the invention has excellent mechanical property.

The invention relates to a biological medical degradable zinc-based alloy. The biological medical degradable zinc-based alloy is characterized in that a zinc alloy system is composed of Zn, Mg, Ca and Mn and comprises, by mass, 0 to 1.5% of Mg, 0 to 0.5% of Ca and 0 to 0.2% of Mn, with the balance being Zn, wherein Mg is not equal to 0. The zinc-based alloy prepared in the invention avoids introduction of unfavorable elements, has good mechanical properties, excellent corrosion resistance and strong corrosion failure controllability, and can meet requirements for biological safety and comprehensive mechanical properties of a biomaterial in the field of medical instruments.

The invention discloses a water-phase electrolyte system zinc iodine secondary battery and a preparation method thereof. The battery comprises a positive electrode, a negative electrode, a water-phaseelectrolyte and a diaphragm. The positive electrode is a composition material containing iodine, the negative electrode is pure zinc or zinc base alloy, and the water-phase electrolyte is a zinc saltwater solution. When the battery works, reversible chemical reaction between zinc and iodine is carried out, so that the battery is essentially different from a zinc ion battery on the basis of reversibly embedding or separating a zinc ion in/from a positive electrode material. The built zinc iodine secondary battery has a simple structure, good safety, high energy density, low material cost, environment protection, and a better application prospect.

The invention discloses a corrosion-resistant and high-strength and toughness Zn-Fe-RE-based zinc alloy capable of being degraded in a human body and an application of the corrosion-resistant and high-strength and toughness Zn-Fe-RE-based zinc alloy, relates to field of medical implantation materials, and provides the corrosion-resistant and high-strength and toughness Zn-Fe-RE-based zinc alloy which is low in cost of added materials, high in strength, good in plasticity and controllable in degradation rate, has non-expanding and non-migrating degradation products and can be simultaneously degraded in the human body against the defects in the prior art. The zinc alloy comprises Zn, Fe and RE elements, wherein the content of the Zn element in mass percentage is 82-99.997%, the content of the Fe element in mass percentage is 0.002-10%, and the content of the RE element in mass percentage is 0.001-8%. The cost of the materials added into the zinc-based alloy disclosed by the invention is low, the degradation products of various components in the prepared alloy material can be degraded in the human body by metabolism, the corrosion resistance is much higher than that of a magnesium alloy, the degradation speed is greatly reduced, a mechanical support can be provided for a longer time, and the alloy material has good strength and toughness.

The invention discloses a build-up welding rod resistant to the corrosion of liquid state Zn and Al-Zn based alloy, composed of rutile, marble, fluorite, feldspar, mica, Cr powder, silicon iron, ferromanganese, molybdenum-iron, aluminium iron, Ni powder, titanium pigment, ferrotitanium and rare earth. It heightens Si content (Si>2%), and adds in Cr to prohibit zinc-iron alloying reaction, increases Mn content to reduce the soakage of Zn liquid to steel base, and increases Ni and Cr to effectively reduce Al-Zn liquid containing zinc-iron alloying reaction. It reasonably selects Si, Mn, Ni, Cr, Mo, etc in the deposited metal to make the deposited metal have good Zn liquid corrosion resistance. It is applied to the corrosion resisting of 0-7% Al containing Zn liquid and liquid Zn based alloy. Its life of built-up welding layer is 3-50 times of low-carbon (C<0.03%), low silicon (Si<0.03%) steels.