35 results about "Sn element" patented technology

The invention discloses a semiconductor in-vehicle environment HCHO sensing material and a preparation method thereof. The method comprises the following steps: step 1, preparing a precursor solution of an Sn element; 2, preparing a precursor solution of an Sb element; step 3, synthesizing and preparing SnO2 semiconductor HCHO sensing materials doped with different contents of Sb by using a self-built CSHS reaction device; step 4, preparing nano SnO2 semiconductor HCHO sensing material powder doped with different contents of Sb; and step 5, preparing the pole piece for testing the sensing performance of HCHO. The Sb-doped nano SnO2 semiconductor HCHO sensing material prepared by the method is good in structural consistency and excellent in sensing performance, the preparation method is green, energy-saving and efficient, 24-hour continuous preparation can be realized, and the material yield is high.

The invention provides a stress relaxation resistant low beryllium copper alloy and a preparation method thereof, and belongs to the technical field of alloys. The stress relaxation resistant low beryllium copper alloy is prepared from the following components in percentage by mass: 0.1 to 0.5 percent of Be, 0.1 to 0.5 percent of Co, 0.1 to 0.3 percent of Sn and the balance of Cu. The Sn element and the Co element are added, and a Cottrel air mass can be formed by utilizing Sn atoms and Co atoms to hinder dislocation motion, so that the stress relaxation resistance is improved. The result of the embodiment shows that the stress relaxation rate of the low-beryllium copper alloy is kept at about 10% in the whole test period, the low-beryllium copper alloy has excellent stress relaxation resistance, meanwhile, the tensile strength of the alloy can reach 750-800 MPa, the hardness of the alloy is 240-260 HV, the conductivity of the alloy is 52-55% IACS, and the low-beryllium copper alloy has high strength, high conductivity and excellent stress relaxation resistance.

The invention discloses a fine-grain tungsten-nickel-iron composite material and a low-temperature sintering preparation method thereof. The composite material takes W as a hard phase, Ni and Fe as binding phases, Y2O3 as a particle reinforcement phase and a grain growth inhibitor, and Sn as an alloy element and a sintering fluxing agent. The preparation method comprises the following steps: 1, carrying out carbon heat and hydrogen reduction on WO3, NiO, Fe2O3 and nano carbon black to obtain composite powder; 2, carrying out wet grinding with Sn and Y2O3 powder, and drying; 3, compression molding; 4, degreasing and pre-sintering treatment; and 5, low-temperature liquid-phase sintering. According to the composite material, low-temperature liquid-phase sintering is achieved by introducing the Sn element and the Y2O3, the wettability and the interface bonding force between W crystal grains and a bonding phase are improved, and the composite material with uniform components and refined crystal grains is obtained; the preparation method improves the tensile strength, microhardness and room temperature plasticity of the composite material, and is suitable for the fields of aerospace, national defense and military industry, nuclear industry, electronic information, metallurgy and the like.

The invention belongs to the field of steel welding, and discloses a method for improving welding deformation of high-strength alloy steel. When austenite in the high-strength alloy steel is converted into martensite, along with volume expansion, different martensite transformation temperatures and different volume expansion amounts of the martensite are different, and finally different welding deformation degrees are caused. A proper amount of Sn element powder is added into deposited metal powder, the martensite transformation temperature of the deposited metal powder can be effectively changed, welding deformation is reduced by adjusting the martensite transformation temperature, and the welding deformation degree of the high-strength alloy steel can be greatly controlled.

The application provides a high-strength and high-damping titanium-based eutectic alloy, and belongs to the field of new material research and preparation. 70‑x‑y Nb x Zr y Fe 30 ) 100‑a‑b Sn a O b Wherein, 0.1<=x<=5, 0.1<=y<=5, 0.1<=a<=5, 0.1<=b<=1. Commercial industrial pure Ti, Fe, Nb, Zr, Sn and TiO2 are used as raw materials to prepare the target alloy, vacuum arc melting technology is used to melt and prepare the alloy ingot, and then copper mold casting technology is used to obtain the required alloy plate. The alloy of the application is (near) eutectic composition, the alloy melt has good fluidity and excellent casting performance; the eutectic structure formed by the alloy can have Snoek relaxation coupling effect, so that the material has better damping performance (Q ‑1 >0.03), the room temperature compression yield strength of the material is more than 2GPa, and in addition, the addition of a small amount of Nb, Zr and Sn elements can refine the alloy structure, and the mechanical properties and damping performance of the alloy are obviously improved.

The invention belongs to the technical field of alloy preparation, and particularly discloses a corrosion-resistant high-entropy alloy containing a non-equimolar-ratio Sn element and having a double-phase structure and a preparation method of the corrosion-resistant high-entropy alloy, the Sn element is added into a fcc and hcp double-phase CoCrFeNi multi-principal-element alloy, and a novel CoCrFeNiSn0.3 high-entropy alloy is formed. In the corrosion process, the Sn element induces the surface of the high-entropy alloy to generate a passive film structure, and under the polarization condition of 0VAg / AgCl, the passive film structure is most uniform and stable, so that further corrosion reaction can be hindered, and the corrosion resistance is improved.

The application discloses a lead-free heavy-load copper-tin-silicon sliding bearing material and a preparation method thereof, and belongs to the technical field of bearing alloy materials. The lead-free heavy-load copper-tin-silicon sliding bearing material comprises tin 10 wt.%, silicon 2 wt.%-6 wt.% and the balance of copper in terms of mass percentage. The sliding bearing material only contains three elements of copper, tin and silicon, has simple composition and does not contain lead element, and the obtained bearing material is non-toxic and friendly to the environment. The material is prepared by adopting a spark plasma sintering process, powder particles are directly heated by pulse current, the surface of the particles is activated by a spark plasma, rapid densification sintering can be realized at a lower temperature, grain growth, Sn element segregation and Si phase coarsening are effectively inhibited, and the density, mechanical properties and wear resistance of the bearing are significantly improved, and the process has the advantages of energy saving and high efficiency.

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.

The present invention discloses a method for improving the compression performance of a MnCoSi-based giant magnetostrictive material, belonging to the technical field of giant magnetostrictive materials. The Sn element is added to the MnCoSi-based giant magnetostrictive material to improve the compression performance of the material. In terms of atomic percentage, the chemical expression of the material after the Sn element is added is MnCoSiSn x , x =0.1~0.2. The steps are: mixing ingredients according to atomic percentage, repeatedly smelting to obtain an ingot, vacuum packaging in a quartz tube, and heat treating to obtain the material. The present invention directly adds the low-melting-point element Sn to the MnCoSi-based alloy during the alloy smelting process. The Sn element can be evenly distributed in the cracks of the alloy, causing adhesion, thereby obtaining a relatively dense MnCoSi / Sn alloy.

The invention relates to the technical field of magnesium alloys, in particular to a high-current-efficiency magnesium alloy and a preparation method thereof.The preparation method comprises the steps that raw materials including magnesium, manganese, zirconium and tin are obtained; magnesium ingots are put into a resistance furnace to be heated until the magnesium ingots are completely molten, and manganese, zirconium and tin which are weighed in advance are added into the molten magnesium; the smelted alloy is subjected to homogenization treatment; the alloy obtained after homogenization treatment is subjected to extrusion forming; and the alloy obtained after extrusion forming is subjected to solution treatment and then subjected to aging treatment, and the high-current-efficiency magnesium alloy is obtained. The prepared high-current-efficiency magnesium alloy is subjected to electrochemical performance and weightlessness corrosion testing. By adding specific Zr and Sn elements and adopting a special preparation process, Zr can significantly refine alloy grains and remove impurity elements such as Fe and Si, and the addition of Sn can improve the self-corrosion potential of the magnesium alloy and reduce the hydrogen evolution rate. And the current efficiency of the magnesium alloy is obviously improved.

The high-strength extruded magnesium alloy comprises the following components in percentage by weight: 0.25 to 1.45 percent of Ce element, 0.5 to 2.5 percent of Yb element, 1 to 2 percent of Sn element, 1.35 to 1.95 percent of Al element and the balance of metal Mg and some inevitable impurity elements. After the high-strength extruded magnesium alloy is subjected to extrusion and aging treatment, the tensile strength and the elongation of the magnesium alloy at the temperature of 275 DEG C are 373 MPa and 15.6% respectively, and the tensile strength and the elongation of the magnesium alloy at the temperature of 300 DEG C are 321 MPa and 18.3% respectively. The high-strength extruded magnesium alloy has excellent tensile strength, high heat resistance and good formability, and the technical problems that an existing magnesium alloy is not high in strength, poor in heat resistance and not prone to forming machining are solved.

The invention relates to the technical field of non-oriented silicon steel for driving motors, in particular to a method for improving the production efficiency of non-oriented silicon steel for automobile driving motors, which adopts a high Si and Al component system with extremely low S content, low P content and addition of part of Sn element, and optimizes a primary annealing process after primary cold rolling. The surface oxidation degree of the steel plate after primary annealing is effectively reduced, the first-pass rolling force and the strip breaking frequency of the secondary cold rolling procedure are indirectly reduced, and the cold rolling yield is increased. The high-efficiency high-strength non-oriented silicon steel produced through the steps is bright in surface and high in magnetic induction, the rolling force of the first pass of second cold rolling is reduced by 40% or above, the cold rolling yield is increased by 2% or above, and the magnetic performance is more excellent than that of a traditional mark.

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 invention provides a shape memory alloy and a preparation method and application thereof. The invention provides a shape memory alloy. The shape memory alloy comprises a eutectic structure; the eutectic structure comprises a B19 '-NiTiHf matrix phase and a Ti3Sn phase; according to the shape memory alloy, the Sn element is added into the NiTiHf alloy, a eutectic structure containing the B19 '-NiTiHf matrix phase and the Ti3Sn phase is introduced, the B19'-NiTiHf matrix phase is strengthened through the Ti3Sn phase and the eutectic phase interface, and then the high-temperature shape memory effect and the hyperelastic performance of the alloy are improved.

The invention relates to the technical field of welding, and provides a high-fluidity copper-phosphorus-tin composite brazing filler metal and a preparation method thereof.The high-fluidity copper-phosphorus-tin composite brazing filler metal is prepared from Cu-P alloy powder and Cu-Sn alloy powder; the mass content of the Sn element in the raw materials is more than 6 wt%, and the Sn element is derived from Cu-Sn alloy powder; the mass content of the P element in the raw materials is 2.4 wt.%-14 wt.%, and the P element is derived from the Cu-P alloy powder; the mass of the Cu-P alloy powder is recorded as w1; the mass of the Cu-Sn alloy powder is recorded as w2; the value of w1 / w2 ranges from 0.42 to 2.33; recording the average particle size of the Cu-Sn alloy powder as x; recording the average particle size of the Cu-P alloy powder as y; the value of x / y is 1.6 to 3. The high-fluidity copper-phosphorus-tin composite brazing filler metal has the welding self-brazing function and the high-fluidity function, and compared with common Cu-P-Sn in the market, the high-fluidity copper-phosphorus-tin composite brazing filler metal has the obvious improvement effect.

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 present invention discloses a negative electrode material of In-Sn-Bi ternary eutectic alloy. The ternary eutectic alloy negative electrode material comprises three elements of In, Sn and Bi, and the molar ratio of In to Sn is (1-2):1, and the Bi content is greater than 25%. The present invention also discloses a preparation method and an application of the In-Sn-Bi ternary eutectic alloy negative electrode material. The In-Sn-Bi ternary eutectic alloy negative electrode material provided by the present invention, by adopting a combination of In element and Sn element with a specific molar ratio, and at the same time combining with Bi which has good kinetics but is easy to decay, the three form a eutectic structure with a fine nanoscale structure during the ball milling alloying process, significantly increasing the specific surface area of the active material and the stability of the structure. The formed hexagonal Bi phase, tetragonal Sn phase and tetragonal InBi phase improve the specific capacity of the magnesium battery and have excellent cycle stability. The alloy negative electrode material prepared from the In-Sn-Bi ternary eutectic alloy negative electrode material has extremely small screening after 80 cycles, and the capacity retention rate is as high as 98%.

The application belongs to the technical field of titanium alloy, and relates to a low-cost large-size titanium alloy ingot for ocean engineering and a preparation method thereof. The ingot replaces expensive V elements or Nb elements with relatively low-priced Sn elements and Cr elements, thereby reducing the preparation cost and facilitating large-scale application in the field of ocean engineering; and by strictly controlling process parameters such as vacuum degree and air leakage rate in the three-time vacuum consumable melting process, the distribution coefficient of alloy elements is close to 1, the segregation of chemical components in the ingot is reduced, the uniformity of chemical components in the titanium alloy ingot is effectively ensured, the industrialized preparation of a Φ920mm large-size 8-ton ingot is successfully realized, and the problems such as component segregation are effectively solved. And the diameter of the rod prepared by using the finished ingot can reach more than 400mm, the annealed room temperature mechanical properties of the rod are excellent, and the performance level reaches that of TC4 and Ti80.

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 present application relates to the technical field of welding, and provides a high-fluidity copper-phosphorus-tin composite brazing filler metal and a preparation method thereof, the raw material of the high-fluidity copper-phosphorus-tin composite brazing filler metal comprising Cu-P alloy powder and Cu-Sn alloy powder; the mass content of Sn element in the raw material is more than 6 wt.%, and the Sn element is derived from the Cu-Sn alloy powder; the mass content of P element in the raw material is 2.4 wt.% to 14 wt.%, and the P element is derived from the Cu-P alloy powder; the mass of the Cu-P alloy powder is denoted as w1; the mass of the Cu-Sn alloy powder is denoted as w2; the value of w1 / w2 is 0.42 to 2.33; the average particle size of the Cu-Sn alloy powder is denoted as x; the average particle size of the Cu-P alloy powder is denoted as y; and the value of x / y is 1.6 to 3. The high-fluidity copper-phosphorus-tin composite brazing filler metal has the functions of welding self-brazing and high fluidity, and has a significant improvement effect compared with ordinary Cu-P-Sn on the market.

The application relates to the technical field of metal materials, and particularly provides a high-strength stable aluminum-lithium alloy and a preparation method thereof. The application adds one or more of Sn / Sc / Si elements on the basis of a third-generation Al-Cu-Li alloy, the Sn element must be added, and the content of original micro-alloy elements in the alloy is optimized, so that the alloy can obtain the performance equivalent to or even better than that of a conventional T8-state alloy in a T6 state, and the morphology and interface of precipitated phases are improved by fully utilizing the multi-element synergistic effect of trace elements, the formation of the precipitated phases is promoted, and the coarsening rate of the precipitated phases is inhibited, so that the strength and thermal stability of the aluminum-lithium alloy are greatly improved. In addition, the Sn element is used to partially replace the high-cost Ag element, so that the raw material cost is greatly reduced under the premise of guaranteeing the comprehensive performance of the alloy.

The invention discloses a lead-free heavy-load copper-tin-silicon sliding bearing material and a preparation method thereof, and belongs to the technical field of bearing alloy materials. The lead-free heavy-load copper-tin-silicon sliding bearing material comprises the following components in percentage by mass: 10wt% of tin, 2wt%-6wt% of silicon and the balance of copper. The sliding bearing material only contains three elements of copper, tin and silicon, is simple in composition and free of lead element, and is non-toxic and environment-friendly. The material is prepared by adopting a spark plasma sintering process, powder particles are directly heated through pulse current, and the surfaces of the particles are activated through discharge plasma, so that rapid densification sintering can be realized at a relatively low temperature, grain growth, Sn element segregation and Si phase coarsening are effectively inhibited, and the compactness, the mechanical property and the wear resistance of the bearing are remarkably improved; and meanwhile, the process advantages of energy conservation and high efficiency are achieved.

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 an aluminum alloy and a preparation method thereof, an aluminum alloy conductor and a power transmission line. The invention relates to an aluminum alloy, which comprises the following components in percentage by mass: 0.05 to 0.25 percent of Zr, 0.005 to 0.2 percent of Sn, less than or equal to 0.005 percent of (Mn + Cr + V + Ti) and the balance of Al. According to the aluminum alloy in the technical scheme, the Sn element is introduced, the high bonding capacity and extremely low solid solubility of the Sn element and vacancies are utilized, formation of a beta-Sn phase is promoted, then the Sn element serves as a heterogeneous nucleation site of an Al3Zr phase, and precipitation of an L12 type Al3Zr phase is accelerated. And due to the addition of Sn, good heat resistance, high conductivity and excellent creep resistance can still be obtained under the condition of lower Zr content, and meanwhile, the material and energy consumption cost is remarkably reduced.

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.