12 results about "Sn element" patented technology

The invention relates to a preparation method for improving the uniformity of Sn element components of zirconium alloy, which comprises the following steps: S1, determining alloy components except the Sn element in a finished cast ingot according to the total mass of the finished cast ingot and the zirconium alloy ratio; s2, according to the total number N of the electrode blocks and the Sn element ratio, the Sn element adding amount of each electrode block is determined through alternate gradient burdening calculation, and the alloy components determined in the S1 and the Sn element are mixed into a mixed alloy material; s3, sponge zirconium and the mixed alloy material are pressed into an electrode block according to a layered spreading mode, and the electrode block is welded into a consumable electrode; and S4, the consumable electrode obtained in the S3 is subjected to vacuum consumable smelting to form the zirconium alloy cast ingot with uniformly distributed Sn element components. According to the invention, by adopting an alternate gradient burdening and layered spreading mode, the axial and radial dual uniform distribution of the Sn element in the finished cast ingot is realized, so that the content fluctuation of the Sn element in the finished cast ingot is small, and the component uniformity is obviously improved compared with the prior art.

This invention discloses a low-carbon tin-containing free-machining steel and its production method. The weight percentage (wt%) of the chemical composition in the steel is: C 0.06-0.15, Si 0.10-0.30, Mn 1.50-1.80, S 0.40-0.60, P 0.06-0.10, Sn 0.30-0.50, Mn / S≥4.0, Sn / S≥0.80, O: 130-200ppm, with the remainder being iron and unavoidable impurities. This invention, through compositional design, controls Mn / S≥4.0 to improve the spindle morphology of sulfides, and Sn / S≥0.80 to achieve Sn aggregation near sulfides and grain boundaries, as well as aggregation and precipitation in other areas of the material matrix, which is more conducive to improving the material's machinability and reducing turning cracks. The Sn element is added using a combined addition technology of the tundish impact zone and the crystallizer nozzle, which improves the Sn yield.

The invention belongs to the technical field of aluminum alloy materials, and relates to a high-strength plastic aluminum alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: 2-6% of Mg, 0.4-0.9% of Mn, 0.2-0.6% of Si, 0.05-0.15% of Sn, less than or equal to 0.15% of Fe, less than or equal to 0.1% of Ti and the balance of Al. By introducing the Sn element, a low-melting-point MgSiSn primary phase is formed in the as-cast stage and is converted from a continuous net shape to an intermittent particle shape in the homogenizing heat treatment process, and the adverse effect of grain boundary brittle intermetallic compounds is weakened. Meanwhile, Sn solid-dissolved in an aluminum matrix forms a nanoscale MgSiSn precipitated phase in the homogenization process, the nanoscale MgSiSn precipitated phase serves as a heterogeneous nucleation core of a Mn-containing second phase, the nucleation energy barrier of the nanoscale MgSiSn precipitated phase is reduced, high-density, fine and uniform precipitation is promoted, and therefore synergistic improvement of the strength and plasticity of the alloy is achieved.

This invention belongs to the field of steel welding and discloses a method for improving welding deformation of high-strength alloy steel. When austenite transforms into martensite in high-strength alloy steel, it is accompanied by volume expansion. Different martensitic transformation temperatures result in different amounts of volume expansion, ultimately leading to varying degrees of welding deformation. Adding an appropriate amount of Sn element powder to the deposited metal powder can effectively change its martensitic transformation temperature. By adjusting the martensitic transformation temperature, welding deformation can be reduced, which can significantly control the degree of welding deformation in high-strength alloy steel.

According to the design and the preparation method of the heat-resistant titanium alloy, stable and ordered strengthening phases of the three elements of Ti, Sn and Al are formed by the alloy through regulation and control of the elements of Sn and Al, and the plasticity and toughness of the alloy are adjusted by combining other neutral and beta stable elements. According to the mass percent, the Sn element in the alloy is controlled to be 6.0%-25.0%, and the Al element in the alloy is controlled to be 5.0%-12.0%. A stable ordered phase formed by the alloy mainly comprises one or more of Ti8AlSn and Ti4AlSn2 which are of a close-packed hexagonal structure and a Ti2AlSn phase of an orthogonal structure. After the heat-resistant titanium alloy prepared on the basis of the design concept is subjected to solution aging treatment, the tensile strength at the high temperature of 700 DEG C is not lower than 650 MPa, the yield is not lower than 550 MPa, the ductility is not lower than 30%, and the area shrinkage is not lower than 60%.

The application belongs to the technical field of brazing, and particularly relates to a medium-temperature lead-containing filler metal and a preparation method and application thereof. The medium-temperature lead-containing filler metal comprises Ag, Sn, Sb and Pb elements and essential impurity elements, wherein the mass percentage of the Ag element is 0.5-2%, the mass percentage of the Sn element is 5-15%, and the mass percentage of the Sb element is 5-15%. Metal raw materials containing the elements are mixed and melted to obtain the medium-temperature lead-containing filler metal. The filler metal is used in a welding product in the field of electronic packaging. The welding interface of the welding product has reliable connection strength, and the interface is continuous and has good consistency. In addition, the welding product has strong applicability to external environment.

The application discloses a high-temperature titanium alloy and a preparation method and application thereof, and belongs to the technical field of high-temperature titanium alloys. The alloy contains Al, W, Si, C, Sn and Ti, Sn is a core control element, and the addition amount is 8.0-12.0%. The preparation method comprises the following steps: mixing raw materials, pressing into an electrode block and welding, three times of vacuum self-consumption arc smelting, six times of grading forging (including blooming, single-phase zone forging and multi-wheel two-phase zone forging), solid solution and aging treatment. Through Sn element control and process optimization, the alloy forms Ti3(Al, Sn) and Ti4(Al, Sn) ordered phases, has the advantages of high strength, excellent high-temperature oxidation resistance and low cost, can be used for preparing high-temperature components such as aerospace engine blades and casings, and provides a new idea for high-temperature titanium alloy composition optimization and engineering application.

The invention provides an interconnection structure and a forming method thereof, and belongs to the field of semiconductors. The interconnection structure comprises a substrate which is provided with a groove; the barrier layer is formed on the inner wall and the bottom of the groove; and the bonding layer is formed on the inner wall and the bottom of the barrier layer, and the bonding layer is doped with metal and is filled in the groove. According to the method, the metal Sn is doped in the Ru thin film, and Ru has a very high melting point, small intersolubility with copper and excellent wettability and adhesion, so that the Ru thin film can be directly electroplated with copper. The barrier layers of Ru and TaN materials are combined, so that the barrier layer has excellent diffusion barrier property on Cu, and the good adhesion of Cu on Ru can be maintained. Besides, metal Sn is doped in the Ru thin film, the lattice continuity of Ru can be destroyed by doping a trace amount of Sn element, grains can be refined, and the rapid diffusion path of copper along the grain boundary can be reduced by a finer and more disordered grain structure, so that the blocking performance is improved, and the reliability of the interconnection structure is effectively improved.

The invention relates to the technical field of metal materials, and particularly provides a high-strength stable aluminum-lithium alloy and a preparation method thereof. One or more of Sn, Sc and Si elements are added on the basis of a third-generation Al-Cu-Li alloy, the Sn element must be added, the content of original microalloy elements in the alloy is optimized, the alloy can obtain the performance equivalent to or even superior to that of a traditional T8-state alloy in a T6 state, the form and interface of a precipitated phase are improved by fully utilizing the multi-element synergistic effect of microelements, and the mechanical property of the alloy is improved. And the coarsening rate is inhibited while formation of a precipitated phase is promoted, and the strength and thermal stability of the aluminum-lithium alloy are greatly improved. In addition, the Sn element is used for partially replacing the Ag element with high cost, and the cost of raw materials is greatly reduced on the premise that the comprehensive performance of the alloy is guaranteed.

The application discloses a manganese white copper material for precision resistance and a preparation method thereof. The material is composed of 15-20 wt% of Ni element, 18-25 wt% of Mn element, 1.0-2.0 wt% of Sn element, 0.2-1.0 wt% of Ti element, 1.5-2.5 wt% of Ag element and the rest of Cu plus inevitable impurities, wherein the mass ratio of Mn to Ni is greater than 1.2. The application reduces the resistance temperature coefficient of the alloy by adding micro-alloy elements such as Sn, Ti and Ag and introducing low-resistance NiMn phase particles; and the uniformity of the microstructure of the manganese white copper finished product is further improved and the performance stability of the alloy finished product is improved by adopting a vacuum horizontal continuous casting technology and a deformation heat treatment process optimization and the like.

The invention belongs to the technical field of metal and nonmetal heterogeneous welding, and particularly relates to active brazing filler metal and a preparation method and application thereof.The active brazing filler metal comprises, by mass, 10%-45% of Mg element and the balance metal elements similar to metal to be welded and inevitable impurities; wherein the metal element similar to the metal to be welded comprises at least one of Al element and Sn element. The active brazing filler metal provided by the invention is magnesium-containing active brazing filler metal, is relatively high in activity, can be applied to heterogeneous welding of metal materials and non-metal materials, does not need to be pressurized, realizes welding of parts in complex shapes, and forms a good welding interface.

The application discloses a kind of rare earth enhanced electromigration resistance SnAgCu solder and its preparation method and application, belong to electronic packaging solder field.The application solves the problem of insufficient anti-electromigration capacity of existing SnAgCu alloy solder etc.The application adds rare earth element Ce, La in Sn3.5Ag0.75Cu alloy solder, and controls its content in alloy, utilizes the higher affinity of rare earth element Ce, La element and Sn element, after welding, in alloy solder organization, it tends to form Ce-La-Sn regular polygon second phase by Ce, La, Sn, which is jointly composed, the second phase particle effectively refines the organizational structure of alloy solder, and effectively resists the movement of dislocation line when alloy solder produces plastic deformation, so that Sn3.5Ag0.75Cu alloy solder strength and anti-electromigration performance are improved.