57 results about "Mg element" patented technology

The invention provides a cast rare earth magnesium alloy and a preparation method thereof, and relates to the technical field of magnesium alloys. The cast rare earth magnesium alloy is prepared from the following elements in percentage by mass: 4.5 to 6.50 percent of Gd element, 0.5 to 2.0 percent of Y element, 0.05 to 1.2 percent of Nd element, 0.05 to 0.5 percent of Er element, 0.3 to 1.2 percent of Zn element, 0.3 to 0.6 percent of Zr element, less than or equal to 0.1 percent of total content of inevitable impurities, less than 0.05 percent of single impurity and the balance of Mg element. By adding the Gd element, the Y element, the Nd element and the Er element, the basal texture of the magnesium alloy can be weakened, and the plasticity is improved. And the content of each element is controlled within the range, so that the interaction among the elements can be improved, and the magnesium alloy can realize good strength and plasticity synergy.

The present invention relates to the technical field of other processing of metals. Disclosed are a free-machining titanium material and a preparation process therefor. The free-machining titanium material comprises: a matrix component group and free-machining component groups, wherein at least one of the free-machining component groups is added to the matrix component group; the matrix component group comprises the following components in percentage by mass: 0-1.0% of Fe, 0-0.08% of N, 0-0.02% of H, 0-0.50% of O, 0-8.0% of Al, 0-15.0% of V, and the balance being titanium and inevitable impurities; and the free-machining component groups are an RE element and S element group, a Cu element and S element group, a Zr element group, a C element group, a B element group, and an Mg element group, respectively. The preparation process involves producing the described free-machining titanium material by using any one of the following three methods: vacuum arc remelting, vacuum floating melting, and powder metallurgy. The present invention solves the technical problem of how to further improve the machinability of titanium materials.

The invention provides a 5G50 aluminum alloy plate strip for anodic oxidation and a preparation method of the 5G50 aluminum alloy plate strip. The 5G50 aluminum alloy plate strip for anodic oxidation comprises the following elements in percentage by mass: 0.01%-0.10% of Si element, 0.04%-0.15% of Fe element, 3.0%-4.0% of Mg element, 0.2%-1.2% of Mn element, less than or equal to 0.02% of inevitable impurity element in total content, less than 0.05 wt% of single impurity element and the balance of Al. Wherein after the aluminum alloy plate strip is subjected to anodic oxidation treatment, the surface of the aluminum material has no heterochromatic stripe defect, and the chromatic aberration E is less than 0.15. The 5G50 aluminum alloy plate strip for anodic oxidation can give consideration to both high surface quality and excellent mechanical performance, is widely applied to 3C consumer electronics, and can achieve the practical effects of falling resistance, light weight and attractive appearance of the product.

The invention belongs to the field of natural gas development, and discloses a high-strength and high-ductility soluble alloy and a preparation method and application thereof, and the soluble alloy comprises the following components in percentage by weight: 8-10% of Mg, 1-2% of Ce, 0.5-1% of Mn, 0.1-0.5% of Bi, 1-2% of Re, 0.5-1% of Ti, 0.5-1% of C, 0.5-1% of Cr, 0.5-1% of Ga, 0.5-1% of Cu and the balance of Al and impurities. The strengthening effect of the Mg element on the aluminum alloy is improved by increasing the content of the Mg element in the alloy, meanwhile, the problems of low tensile strength and sodium brittleness caused by the high Mg element content are solved, the prepared soluble alloy has the characteristics of high strength, high ductility and good solubility, and the performance requirements of the bridge plug preparation field on the soluble alloy are met.

The invention relates to the technical field of alloys, and discloses a high-strength and high-toughness die-cast Al-Mg-Si alloy and a preparation method thereof, and the Al-Mg-Si alloy comprises the following components by weight percent: 5.5-8.5% of Mg, 0.5-1.5% of Mg, 0.5-1.5% of Si, 0.5-1.5% of Al, 0.5-1.5% 2.8 to 4.0% of Si; 0.5 to 0.8 percent of Mn; be: 0.004% to 0.006%; 0.001 to 0.01 percent of Na (sodium); 0.01%-0.2% of a rare earth metal element; the rare earth metal element is at least one of La single rare earth or Ce single rare earth; 0.02 to 0.1 percent of V; the Mg element and the Si element also need to meet the following requirements in percentage by mass: Mg / Si is more than 1.73 and less than 2.5; the total amount of the other impurities is less than or equal to 0.2%; and the balance of Al. The alloy has the characteristics of high strength and high toughness under the condition of a die-casting state, and has important application value.

The invention discloses a 7-series aluminum alloy material and a preparation method thereof, and belongs to the field of aluminum alloy preparation.The 7-series aluminum alloy material and the preparation method thereof have the advantages that on the basis of optimizing components of 7-series aluminum alloy, the proportion and the process of the components are properly adjusted, it can be guaranteed that the tensile strength, the yield strength and the ductility meet the use requirements on the whole, and the corrosion resistance can be further improved; by adding the Zn element and the Mg element, the strength and hardness of the 7-series aluminum alloy can be remarkably improved, a proper Cu or Cr ratio can reduce residual phases (a T-Al2Mg3Zn3 phase, an AlZnMgCu phase or an AlZnMgCr phase), but after solution treatment, the residual phases gradually disappear, all alloy elements can be dissolved in a matrix in a solid mode, an AlFe phase is reduced, then corrosion sites are reduced, and by combining the synergistic effect of the Mn element and the V-containing refiner, the corrosion resistance of the 7-series aluminum alloy is improved. The crystalline phase in the 7-series aluminum alloy is refined, so that the mechanical property of the 7-series aluminum alloy can be obviously improved, and the corrosion resistance of the 7-series aluminum alloy can be obviously improved.

The invention belongs to the technical field of metal materials, and particularly relates to a high-strength corrosion-resistant heat-treatment-free die-casting aluminum alloy and a preparation method thereof. The aluminum alloy comprises, by mass, 5.5%-7.1% of Mg, 2.5%-3.5% of Si, 0.5%-0.75% of Mn, 0.11%-0.7% of Cu, 0.08%-0.15% of Fe, 0.05%-0.1% of Mo, 0.02%-0.05% of V, 0.01%-0.05% of Zr, 0.03%-0.09% of Y and the balance Al and inevitable impurity elements, the content of a single impurity element is smaller than or equal to 0.02%, and the total content of the impurity elements is smaller than or equal to 0.2%. And the mass ratio of the Mg element to the Cu element in the aluminum alloy components is in the range of (10: 1)-(50: 1). The heat-treatment-free die-casting aluminum alloy provided by the invention is high in yield strength and obvious in weight reduction effect.

The invention discloses a method for improving creep resistance of a rare earth magnesium alloy, which comprises the following steps: S1, casting an ingot blank according to the mass percent of each component (0-6% of Y element, 1-3% of Nd element, 0.1-0.5% of Zr element and the balance of Mg element) in the rare earth magnesium alloy; s2, the ingot blank is subjected to solution treatment; s3, the material obtained after solution treatment is subjected to rolling deformation, the rolling deformation temperature ranges from 450 DEG C to 520 DEG C, the reduction rate ranges from 15% to 25%, and the roller linear speed ranges from 2 mm / s to 200 mm / s; and S4, the rolled and deformed material is subjected to aging treatment, the aging treatment temperature ranges from 180 DEG C to 260 DEG C, and the aging treatment time ranges from 5 h to 70 h. According to the method disclosed by the invention, an originally harmful and unavoidable precipitation-free zone formed along a grain boundary is converted into a precipitation-free zone which is beneficial to creep resistance and is uniformly distributed along an intragranular deformation zone, and the creep resistance is remarkably improved.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The present invention discloses a high-toughness and easily soluble magnesium alloy and a preparation method thereof. The high-toughness and easily soluble magnesium alloy contains the following components by mass percentage: 1% to 6% of Zn element, 1% to 4% of Ni element, 0.2% to 4% of element A, 0.2% to 1% of element B, and the balance is Mg element; the element A is at least one of Gd element and Y element, and the element B is at least one of Ga element and In element; the high-toughness and easily soluble magnesium alloy contains 3 kinds of intragranular precipitation phases with regular shapes, and the intragranular precipitation phases are basal plane-oriented MgZn phase, prism plane-oriented MgZn phase, and non-oriented MgNi phase. The high-toughness and easily soluble magnesium alloy of the present invention simultaneously has high strength, high elongation rate, and high dissolution rate. The tensile strength at room temperature is ≥240 MPa, the yield strength is ≥160 MPa, the elongation rate is ≥8%, and the dissolution rate in water at room temperature is ≥30 mg·cm<supgt;‑2< / supgt;·h<supgt;‑1< / supgt>.

The invention discloses a high-strength, high-plasticity and high-thermal-conductivity magnesium alloy and a preparation method thereof.The high-strength, high-plasticity and high-thermal-conductivity magnesium alloy is prepared from, by mass, 3%-6% of Al element, 0-0.2% of Mn element, 0.5%-3% of RE element and the balance Mg element; the RE element is any one of a Y element, a Gd element, an Er element and an Sm element; the grain of the high-strength high-plasticity high-thermal-conductivity magnesium alloy internally comprises an MgAl phase, the volume percentage of the MgAl phase is smaller than or equal to 20%, and the size is smaller than or equal to 300 nm. The high-strength high-plasticity high-thermal-conductivity magnesium alloy disclosed by the invention has the room-temperature yield strength of more than or equal to 200MPa, the tensile strength of more than or equal to 280MPa, the ductility of more than or equal to 20% and the thermal conductivity of more than or equal to 110W / (m.K), and can be applied to transportation tools such as new energy automobiles.

The invention discloses a novel high-hardness Mg-Al-Ti alloy as well as a preparation method and application thereof. The novel high-hardness Mg-Al-Ti alloy comprises an Mg element, an Al element and a Ti element, and the mass fraction of the Mg element is 30%-50% by weight, the mass fraction of the Al element is 30%-50% by weight, and the mass fraction of the Ti element is 8%-20% by weight. The preparation method comprises the following steps: uniformly grinding raw materials containing an Mg element, an Al element and a Ti element, and pressing into a blank body; the preparation method comprises the following steps: preparing a blank body, heating the blank body to a temperature required by sintering in an inert atmosphere at a heating rate of 4-5 DEG C / min, a temperature required by sintering of 410-435 DEG C and a sintering time of 1-1.5 h, and carrying out in-situ sintering on the blank body to prepare the novel high-hardness Mg-Al-Ti alloy, with the heating rate of 4-5 DEG C / min, the sintering temperature of 410-435 DEG C and the sintering time of 1-1.5 h. The high-hardness novel Mg-Al-Ti alloy provided by the invention is high in density, uniform in component and excellent in mechanical property, and can be widely applied to the fields of aerospace, automobile traffic and electronic products.

The invention provides a magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following elements in percentage by mass: 2.0 to 4.5 percent of Zn element, 1.0 to 2.5 percent of Sm element, 0.5 to 1.5 percent of Cu element, 0.1 to 0.6 percent of Ce element, 0.1 to 0.5 percent of A element, less than or equal to 0.15 percent of inevitable impurities and the balance of Mg element, wherein the element A is selected from any one or more of Ca element, Sr element and Zr element; the heat conductivity of the magnesium alloy ranges from 130 W / (m.K) to 142 W / (m.K), the tensile strength ranges from 260 MPa to 285 MPa, the yield strength ranges from 150 MPa to 170 MPa, and the ductility ranges from 10% to 15%. The magnesium alloy disclosed by the invention has relatively high heat conductivity and relatively high strength, so that the requirement of a high-power integrated light-weight electronic component heat dissipation piece is met.

The invention relates to the technical field of alloys, in particular to a heat treatment-free 3D printing Al-Zn-Mg-Si-(Cu) alloy which comprises the following components in percentage by weight: 0.5% of Cu, 3.4%-5.2% of Mg, 2%-6.5% of Zn, 1.0%-3% of Si and the balance of Al and other elements. In the Al-Zn-Mg-Si-(Cu) alloy material, higher alloy strength is obtained by increasing the content of Mg element and adding a proper amount of Cu element. And the strength of the alloy in a printing state can reach 501 MPa. And a new mode is provided for the aluminum alloy special for 3D printing.

The invention relates to the technical field of alloy stabilization, in particular to a method for enabling Mg element components of a 6-series alloy to be more stable, which comprises the following steps: in a 6-series alloy smelting stage, adding cerium and lanthanum into a melt according to a ratio, reacting with the alloy to generate a magnesium hydroxide stable phase, adding zirconium in a smelting process stage, and carrying out heat treatment to obtain the 6-series alloy. Carrying out extrusion forming on the alloy with uniformly distributed magnesium, carrying out stepped aging treatment, carrying out heat preservation at 120 DEG C for 8 hours to promote eta'phase precipitation, raising the temperature to 180 DEG C, carrying out heat preservation for 4 hours, and carrying out comprehensive performance detection on the alloy to ensure that the magnesium element is stable and the performance of the alloy reaches the standard so as to obtain a high-quality alloy product. The method solves the problems that the strength is unstable due to segregation of the magnesium element in the 6-series alloy, the corrosion resistance is reduced due to oxidation loss, the thermal responsiveness is reduced after T6 aging due to recrystallization abnormal diffusion (the hardness improvement amplitude is small), and the magnesium element stability and the alloy comprehensive performance optimization are difficult to realize by the existing process.

The invention belongs to the technical field of soluble magnesium alloy rods, and discloses a soluble magnesium alloy rod with enhanced elongation, and the magnesium alloy rod comprises the following chemical components in percentage by mass: 1.5%-14.5% of Gd element, 0.5%-4.0% of Y element, 0.1%-2.5% of Zn element, 0.2%-0.5% of Zr element, 0.01%-0.5% of Li element, 0.01%-0.6% of Ni element, 0.01%-0.5% of Ga element, 0.01%-0.5% of In element, 0.1%-2.0% of Cu element and the balance of Mg element. In component design, various elements are scientifically proportioned, the proportion of Gd to Y and the proportion of Zn to Zr are just right, specific elements are added to form a composite structure, the ductility is improved, the dissolution rate and strength are balanced by means of the Cu element, in the performance aspect, dissolution is accelerated at the high temperature of 200 DEG C, the dissolution rate is increased by 10%-15% compared with the room temperature, the degradation period can be shortened, a dissolved product is fine and uniform, and the degradation rate is high. The biocompatibility and environmental friendliness are excellent, the application field is wide, and degradable medical instruments are covered.

The invention provides an aging strengthening type Cu-Cr-Re-Mg alloy and a preparation device and method thereof, and relates to the technical field of high-performance alloys, and the aging strengthening type Cu-Cr-Re-Mg alloy provided by the invention comprises the following element components in percentage by mass: 6-13.5% of Cr, 0.11-0.95% of Re, 0.04-0.45% of Mg and inevitable impurity content tilt. 0.2%, and the balance being Cu. According to the aging strengthening type Cu-Cr-Re-Mg alloy, the trace element Re is introduced into the aging strengthening type Cu-Cr-Re-Mg alloy, a dispersed high-temperature-resistant phase is generated after aging treatment, and the high-temperature-resistant phase and a Cr phase cooperate to strengthen a copper matrix; and meanwhile, an intermetallic compound can be generated by the added Mg element and Cr, and the effect of multiphase precipitation strengthening of a copper matrix is achieved after aging treatment, so that the hardness of the alloy is greatly improved under the condition that the electric conductivity loss is not large.

The application discloses a vacuum die-casting motor rotor casting aluminum alloy and a preparation method thereof. According to mass percentage, the vacuum die-casting motor rotor casting aluminum alloy comprises the following components: 3.0-6.5% of Ni elements, 0.3-1.0% of Fe elements, 0.2-0.4% of Mg elements, 0.02-0.1% of B elements, 0.1-0.6% of Ce elements, and the rest is Al, and the rest is impurity elements; wherein, the content of a single impurity element is less than 0.03%, and the total content of the impurity elements is less than 0.2%.

The present application relates to a kind of high-strength steel of anti-fatigue and crack arrest and its preparation method, it relates to metal material technical field, it is by the following chemical components by mass percentage composition: C:0.029-0.079%, Si:0.09-0.29%, Mn:1.41-1.69%, Nb:0.019-0.029%, Zr:0.0041-0.0199%, Mg:0.0014-0.0199%, the rest is Fe and inevitable impurity;Zr element and Mg element mass percentage also simultaneously satisfy formula: 0.0041%<Zr+Mg<0.0199%, and Zr / Mg=1-3.The high-strength steel plate of the present application adopts low-carbon, low-silicon, middle-manganese inexpensive chemical composition design, does not contain Cr, Ni, Cu and other valuable metal elements, substantially reduces material cost;The present application does not use traditional Al deoxidation technology, instead is Si-Mn initial deoxidation, Zr-Mg final composite deoxidation, forms small, dispersed and uniform composite oxysulfide, substantially improves plasticity and toughness, significantly improves anti-fatigue performance, is suitable for the high-strength steel of anti-fatigue performance requirement high offshore wind power equipment equipment.

The present invention discloses an aluminum alloy and a design method thereof, wherein S1, a preset Mg element addition amount, a non-equilibrium distribution coefficient is used instead of a balanced distribution coefficient, an improved Scheil formula is obtained, and T-f is plotted. s Curve; based on the plotted T‑f s The cracking tendency index of aluminum alloy is calculated by curve; S2, the mixed non-equilibrium distribution coefficient of aluminum alloy with different Si addition amounts is calculated, and the mixed non-equilibrium distribution coefficient is used instead of the equilibrium distribution coefficient to obtain the improved Scheil formula, and T-f is plotted. s Curve; based on the plotted T‑f s The cracking tendency index of the aluminum alloy under different Si addition amounts is calculated using a curve to determine the Si element addition amount. The aluminum alloy comprises, in mass percentage, the following: Mg 6.0-9.0%, Si 0.6-1.5%, Zn 0.1-0.8%, Cu 0.1-0.8%, Sc 0.3%-0.5%, with the balance being Al and unavoidable impurities. The aluminum alloy can be used in selective laser melting technology. Using the aluminum alloy powder as raw material, the selective laser melting technology can produce aluminum alloy structural parts with both high strength and high plasticity.

The invention discloses a creep-resistant magnesium alloy with high elasticity modulus and high damping and a preparation method thereof, and the creep-resistant magnesium alloy with high elasticity modulus and high damping comprises the following components in percentage by mass: 1.2%-3.5% of Zn element, 2.5%-12% of Gd element, 0.5%-6% of Yb element, 0.15%-1.2% of Ni element, 0.3%-0.8% of Mn element, 0-0.5% of Cu element, 0.1%-5% of HRE element and the balance of Mg element. The HRE element is one or more of a Dy element, a Sm element and a Tb element, and the mixing enthalpy delta H of the creep-resistant magnesium alloy with the high elastic modulus and the high damping is-1.1 kJ / mol to-0.2 kJ / mol. The creep-resistant magnesium alloy with high elastic modulus and high damping is suitable for the fields of aerospace, precise instruments, transportation, 3C electronics and the like, and has remarkable technical and economic values.

The application provides a cast rare earth magnesium alloy and a preparation method thereof, and relates to the technical field of magnesium alloys. The cast rare earth magnesium alloy comprises the following elements in percentage by mass: the content of Gd element is 4.5-6.50%, the content of Y element is 0.5-2.0%, the content of Nd element is 0.05-1.2%, the content of Er element is 0.05-0.5%, the content of Zn element is 0.3-1.2%, the content of Zr element is 0.3-0.6%, the total content of unavoidable impurities is less than or equal to 0.1%, the content of single impurity is less than 0.05%, and the balance is Mg element. In the application, the addition of Gd element, Y element, Nd element and Er element can weaken the basal texture of the magnesium alloy and improve the plasticity. Controlling the content of each element in the above range is helpful to improve the interaction between the elements, thereby helping the magnesium alloy to realize good strength-plasticity synergy.

The invention belongs to the technical field of preparation of thermoelectric semiconductor materials, and provides a method for synthesizing an Mg3 (Bi, Sb) 2-based material through ball milling in order to solve the problems that in the process of synthesizing a magnesium-based material through a ball milling method, the preparation time is long, and components are not uniform due to material cold welding caking, and the like, and the method comprises the steps that high-purity Bi particles, high-purity Sb particles and high-purity Mg chips are weighed in a glove box under the inert atmosphere; secondly, in a glove box, Bi particles and Sb particles are placed in a ball milling tank, ball milling balls with different diameters are added, and then pre-ball milling is conducted under the inert atmosphere; the preparation method comprises the following steps: pre-ball-milling Bi and Sb powder, adding Mg chips under the protection of an inert atmosphere after pre-ball-milling, fully mixing the ball-milled Bi and Sb powder with the Mg chips, and then ball-milling in the inert atmosphere to obtain the Mg3 (Bi, Sb) 2-based material. By changing the feeding sequence and optimizing the feeding particle size, the specific surface area of the powder is increased, the reaction speed of the powder and the Mg element is increased, and the phenomena of adhesion of the material and the tank wall and cold welding agglomeration are prevented, so that the material synthesis efficiency and the component uniformity are improved.

The invention provides a high-performance Al-Si-Cu-Mg alloy based on in-situ synthesis and a preparation method thereof, and belongs to the technical field of metal materials. AlSi10Mg and an AA-2024 alloy are subjected to ball milling and mixing according to the mass ratio of (3-5): (5-7), and the Al-Si-Cu-Mg alloy is obtained. The Al-Si-Cu-Mg alloy is prepared from, by mass, 4.5%-7.0% of Si, 1.3%-2.4% of Cu, 0.6%-1.1% of Mg and the balance Al, and the content of inevitable impurities is smaller than or equal to 0.1%. And the Al-Si-Cu-Mg alloy is subjected to fusion forming through a laser powder bed, and aging treatment is carried out at 160-200 DEG C for 0.2-8 h, so that the high-performance Al-Si-Cu-Mg alloy is obtained. According to the obtained high-performance Al-Si-Cu-Mg alloy, the density reaches 99.0%-99.6%, cracks are avoided, fine crystal grains are evenly distributed (smaller than or equal to 17 microns), intracrystalline cellular structures are fine (smaller than or equal to 0.57 microns), nanometer strengthening phases are separated out in a dispersed mode (the L phase (needle-shaped metastable phase containing Al, Si, Cu and Mg) is smaller than or equal to 10 nm, and the beta ''-Mg2Si is smaller than or equal to 50 nm). The method is simplified in process, suitable for near-net forming of complex components and high in material utilization rate. And meanwhile, under the condition that the high ductility is kept, high strength is still obtained, the yield strength of the alloy is larger than or equal to 362 MPa, and the tensile strength is larger than or equal to 519 MPa.

The application relates to a rare earth aluminum alloy plate and a preparation method thereof, and has the purposes of solving the problem that the existing aluminum alloy plate is difficult to have high strength and high toughness, and the rare earth aluminum alloy plate comprises the following elements in percentage by mass: the content of Mg element is 4.2-5.0 wt%, the content of Mn element is 0.14-0.20 wt%, the content of Sc element is 0.12-0.20 wt%, the content of Zr element is 0.10-0.13 wt%, the content of Ti element is 0.05-0.15 wt%, the total content of inevitable impurities is less than or equal to 0.15 wt%, the content of single impurity is less than or equal to 0.05 wt%, and the balance is Al element. The addition of the Sc element and the Zr element helps to improve the strength and the toughness of the rare earth aluminum alloy plate. The application is applied to the technical field of aluminum alloy.

The invention relates to an aluminum alloy plate for an attenuation-resistant ultrathin tank cover material, which comprises the following elements in percentage by mass: 0.07-0.15% of Si element, 0.07-0.15% of Al element, 0.07-0.15% of Al element, 0.07-0.15% of Al element and the balance of aluminum element. 0.15 to 0.3 percent of Fe element; 0.07%-0.15% of a Cu element; 0.3 to 0.5 percent of Mn element; 4.75%-4.95% of an Mg element; 0.01%-0.03% of a Ti element; 0.02 to 0.10 percent of Cr element; 0.01%-0.20% of a Zn element; the total content of the inevitable impurities is smaller than or equal to 0.15%; the sum of the mass of the Mn element and the mass of the Cr element in the aluminum alloy plate for the tank cover material is 0.40-0.55%. After the 0.200-0.208 mm ultra-thin 202 series two-piece can easy-open cover prepared from the aluminum alloy is subjected to 90 DEG C / 40 min water boiling aging attenuation, the pressure resistance is larger than or equal to 700 KPa, and the attenuation amplitude is smaller than or equal to 30 KPa.

The application discloses a 7-series aluminum alloy material and a preparation method thereof, and belongs to the field of aluminum alloy preparation. On the basis of optimizing the composition of the 7-series aluminum alloy, the proportion of the components and the process are properly adjusted, so that the tensile strength, yield strength and elongation can be guaranteed to meet the use requirements, and the corrosion resistance can be further improved. The addition of Zn elements and Mg elements can significantly improve the strength and hardness of the 7-series aluminum alloy. The proper proportion of Cu or Cr can reduce residual phases (T phase-Al2Mg3Zn3 phase, AlZnMgCu phase or AlZnMgCr), but the residual phases gradually disappear after solid solution treatment, the alloying elements can be solid-solved in the matrix, the AlFe phase is reduced, and the corrosion sites are reduced. In combination with the synergistic effect of the Mn element and the V-containing refiner, the crystal phase of the 7-series aluminum alloy is refined, the mechanical properties of the 7-series aluminum alloy are significantly improved, and the corrosion resistance of the 7-series aluminum alloy is obviously improved.

The present invention discloses an Al-Si alloy filler metal for brazing 5000 series aluminum alloys and a preparation method thereof. During the process of using the Al-Si alloy filler metal for brazing 5000 series aluminum alloys, the Mg element in the base metal diffuses into the filler metal and reacts with Si in the filler metal to form the Mg<subgt;2< / subgt;Si phase, and its morphology and distribution affect the performance of the brazed joint. The combined addition of Be and Sb can improve the morphology of Mg<subgt;2< / subgt;Si. The Sb element and the Mg element diffused into the reaction zone combine to form Mg<subgt;3< / subgt;Sb<subgt;2< / subgt> particles, providing nucleation sites for the crystallization of the Mg2Si phase and reducing the size of the Mg<subgt;2< / subgt>Si phase. After adding the Be element, Be tends to adsorb on the {100} crystal plane of the Mg<subgt;2< / subgt>Si phase and combines with Mg atoms, inhibiting the growth of the Mg<subgt;2< / subgt>Si phase along the <100> crystal direction, making Mg

The invention discloses a high-strength, high-modulus, light and low-cost magnesium-based multi-component alloy material based on magnesium-containing ternary second phase regulation and control, the magnesium-based multi-component alloy material is Mg-Al-Zn-Cu-Ca alloy, and according to atomic percent, the Mg element accounts for 70%-90%; 4%-18% of Al element; the content of Zn element is 4.5%-7%; the content of the Cu element is 3.5%-6%; 0.5%-2% of Ca element; wherein the magnesium-based multi-component alloy material has a phase structure of alpha-Mg, MgAl < 0.93 > Cu < 1.07 > and Mg32 (Al, Zn) < 49 >; compared with the prior art, on the basis of the Mg-Al-Zn-Cu-Ca alloy and the multi-component alloy design concept, the selective precipitation of a second phase can be realized by reasonably regulating and controlling the content of low-cost Al, Zn, Cu, Ca and other alloy elements and further combining a proper heat treatment process, so that the main precipitated phase is a magnesium-containing ternary high-modulus phase; and further, the elasticity modulus and the mechanical property of the whole alloy are optimized.

The application provides an aluminum alloy plate and a preparation method thereof. The preparation method comprises the following steps: after ingredients of the aluminum alloy plate are proportioned, melting, casting, integrated treatment of soaking and heating, hot rolling and cold rolling are sequentially performed to obtain a cold-rolled coil; the ingredients of the aluminum alloy plate comprise the following components in percentage by mass: 0.6-1.3% of Si element, 0.5-1.1% of Cu element, 0.6-1.2% of Mg element, 0.25% of Cr element, 0.7% of Zn element, 0.2% of Ti element, 0.2% of Zr element and the balance of Al element; the cold-rolled coil is sequentially subjected to solid solution, quenching (multi-stage cooling), straightening and pre-aging to obtain a first finished coil; and the first finished coil is subjected to differential temperature heating artificial aging treatment to obtain the aluminum alloy plate. The production efficiency of the above preparation method is high, and the comprehensive performance of the obtained aluminum alloy plate is good.