92results about How to "Simple smelting and processing method" patented technology

The invention discloses a magnesium-lithium alloy material with extremely high thermal conductivity and containing two-phase α+β and a processing technology thereof. In terms of weight percentage, the composition of the alloy is: Li: 8.0‑10.0wt.%, Si: 5.0‑14.0wt.%, In: 1.0‑3.0wt.%, Sn: 0.2‑1.2wt.%, Ti: 0.8‑ 1.2wt.%, Mo: 0.2‑0.4wt.%, Cd: 2.0‑4.0wt.%, Al: 1.2‑1.4wt.%, Co: 1.0‑5.0wt.%, Mn: 3.0‑5.0wt.%, The balance is magnesium. The material has the mechanical properties of traditional magnesium-lithium alloys: the elastic modulus is 50-70GPa, the yield strength is 90-120MPa, the tensile strength is 140-160MPa, and the elongation is 6-18%. And it has high thermal conductivity that traditional magnesium-lithium alloys do not have: the thermal conductivity is 120-130W / m. K, the traditional magnesium-lithium alloy is 80W / m. K or so. While ensuring the mechanical properties of common magnesium-lithium alloys, the heat transfer coefficient of the alloy can be increased by about 50%. This enables the alloy to have further specific applications in the occasions where the heat generation is large and the weight of the device is required, and it is convenient for large-scale industrial application.

The invention discloses silver-free and brittle fracture-resistant 18K rose gold and a processing technology thereof. The silver-free and brittle fracture-resistant 18K rose gold comprises the following components in percent by weight: 0.2-0.4wt.% of Ba, 0.6-0.8wt.% of V, 1.2-1.6wt.% of Ni, 1.0-1.2wt.% of Sb, 8.0-12.0wt.% of In, 74.0-76.0wt.% of Au and the balance of copper. The invention providesnovel silver-free 18K rose gold and the processing technology thereof, and the characteristic of low-temperature brittle fracture of the conventional rose gold is avoided. Through the innovation andoptimization of the alloy components, the development bottleneck of a 18K red gold material for jewelries is broken through; implementation and industrialization of the material achieve plenteous economic results and social benefits.

The invention discloses a low-density high-damping aluminum based damping alloy and a preparation method thereof. The alloy comprises 70-80% of Al, 5-10% of Mg, 5-10% of Zn, 3-5% of Si and 1-6% of Cu. The preparation method comprises the following steps: putting all raw materials in a vacuum induction furnace, carrying out induction melting, heating to 700-900DEG C to form an alloy melt, and carrying out heat insulation for 10min to realize component homogenization; introducing the above obtained melt into a die cavity at 700-800DEG C, applying a pressure of 80-100MPa within 10s by adopting an extrusion casting technology, carrying out die opening after the introduced melt completely solidifies, and taking the obtained casting; carrying out heat treatment on the above obtained material by carrying out heat insulation at 380-450DEG C for 4h and carrying out water quenching to room temperature; and carrying out heat insulation at 120-220DEG C for 20h, and carrying out water cooling to room temperature. The low-density high-damping aluminum based damping alloy id prepared by treating an aluminum alloy as a base, adopting a multi-component alloy technology and controlling the ratio of Mg to Zn. The damping capacity (SDC) of the alloy can reach about 15%, and the density maintains at about 2.7g / cm<3> in order to meet lightweight requirements of alloy materials in the weapon and traffic fields.

The invention discloses a dual-phase α+β magnesium-lithium alloy with excellent casting performance and heat transfer performance and a processing technology thereof. According to weight percentage, the composition of the alloy is: Li: 8.0‑10.0wt.%, Ge: 0.2‑0.8wt.%, Cd: 0.6‑0.8wt.%, Bi: 0.2‑0.5wt.%, Zr: 0.4‑ 0.8wt.%, Pd: 0.1‑0.2wt.%, Cu: 0.3‑0.5wt.%, Al: 1.8‑3.4wt.%, Fe: 0.2‑0.5wt.%, Mn: 0.1‑0.4wt.%, The balance is magnesium. The magnesium-lithium alloy for die-casting has high thermal conductivity that traditional magnesium-lithium alloys do not possess. This enables the alloy to have further specific applications in the occasions where the heat generation is large and the weight of the device is required, and it is convenient for large-scale industrial application.

The invention discloses an iron-based high-damping alloy with high thermal conductivity and a preparation method thereof. The iron-based high-damping alloy comprises the following components in percentage by weight: 6-8% of Cr, 1-2% of Si, 4-6% of Al, 1.5-2.5% of Hf, 4-9% of Cu, 1-2% of B, 2.5-4.5% of Sn, 2-3% of Co and the balance of Fe. The iron-based high-damping alloy with high thermal conductivity has the mechanical property and damping capacity of the traditional iron-based high-damping alloy: the tensile strength is 540-550 MPa, the elasticity modulus is 80-85 GPa, the yield strength is 240-280 MPa, the elongation is 24-32%, and the SDC is 30-34%. On the basis of ensuring the damping capacity and mechanical property of the existing iron-based high-damping alloy for deformation, the thermal conductivity of the alloy is increased to 110-150 W / m.K from about 60-90 W / m.K and the alloy can be applied to occasions of higher temperature and vibration attenuation on a large scale.

The invention discloses a Mg-Li-Sn alloy with flame retardance and a machining process thereof, and unshielded melting of the Mg-Li-Sn alloy under the atmospheric condition can be achieved. The alloyis composed of, by weight, 10.0-12.0% of Li, 2.0-9.0% of Sn, 4.0-6.0% of Sr, 0.2-0.8% of Mn, 0.1-0.2% of Dy, 0.2-0.3% of Ho, 0.8-1.2% of S, 0.2-0.4% of B, and the balance Mg. The solution of a novel material is provided specific to the current situation that a Mg-Li alloy needs shielded melting during melting under high temperature currently. The Mg-Li-Sn flame-retardant alloy with the excellent flame retardance is obtained by an alloying method, and unshielded melting of the Mg-Li alloy under the atmospheric condition is achieved. When the alloy is exposed in the atmosphere under high temperature, an oxide layer and a nitride film are formed on the surface of the alloy. The films are compact in structure and high in spreadability, and the films are solid and not prone to volatilizing under high temperature and can provide excellent protection so that a magnesium alloy melt can be prevented from being further oxidized. The obtained Mg-Li alloy material has the mechanical performance asa traditional Mg-Li alloy under the room temperature, and further has the high heat transfer coefficient which is not possessed by the traditional Mg-Li alloy, specifically, the heat transfer coefficient of the obtained Mg-Li alloy material is 110-120 W / m.K and the heat conductivity coefficient of the traditional material is about 80 W / m.K.

The invention discloses a Mg-Li-Ga alloy which can be smelted without protection under atmospheric conditions and a processing technology thereof. In terms of weight percentage, the composition of the alloy is: Li:8.0‑14.0wt.%, Ga:1.0‑2.0wt.%, Sr:2.0‑8.0wt.%, Nd:0.1‑0.4wt.%, Gd:0.1‑ 0.2wt.%, Yb: 0.1‑0.3wt.%, B: 0.1‑0.2wt.%, In: 0.6‑0.8wt.%, and the balance is magnesium. This patent obtains Mg‑Li‑Ga flame retardant magnesium alloy with excellent flame retardant effect through alloying method, and when the alloy is exposed to the atmosphere at high temperature, a layer of dense and spreadable oxide will be formed on the surface of the alloy. and nitride films. These films are solid and non-volatile at high temperatures, and can provide excellent protection against further oxidation of the magnesium alloy melt, thereby realizing the unprotected melting of magnesium-lithium alloys under atmospheric conditions. The obtained magnesium-lithium alloy material has the mechanical properties of traditional magnesium-lithium alloys at room temperature, and has a high heat transfer coefficient that traditional magnesium-lithium alloys do not have: 110-120W / m.K, while the thermal conductivity of traditional materials is about 80W / m.K.

The invention discloses an antiflaming aluminum-lithium alloy including Sc and Te and a machining process thereof. The antiflaming aluminum-lithium alloy is smelted between 700 DEG C and 800 DEG C. The chemical ingredients of the alloy include, by weight percent, 2.0 wt.% to 6.0 wt.% of Li, 2.0 wt.% to 3.0 wt.% of Sc, 4.0 wt.% to 8.0 wt.% of Sr, 1.0 wt.% to 2.0 wt.% of Te, 2.0 wt.% to 4.0 wt.% ofSi, 1.0 wt.% to 2.0 wt.% of Sn, 0.5 wt.% to 1.5 wt.% of Er, 0.2 wt.% to 0.8 wt.% of Yb, 0.2 wt.% to 0.4 wt.% of Nd and the balance aluminum. The alloy smelt has extremely excellent antiflaming performance in a static state; and in a dynamic process, after a surface film of the alloy is damaged due to intense stirring, the surface film can still be regenerated fast, and oxidative combustion of thealloy is successfully hindered.

The invention discloses a high-damping lithium-magnesium alloy containing dual phases alpha and beta and a processing technology thereof. The high-damping lithium-magnesium alloy is prepared from, by weight, 6.0-10.0% of Li, 1.0-4.0% of Bi, 0.6-3.2% of In, 0.1-0.3% of Y, 0.1-0.4% of W, 0.1-0.2% of Se, 0.1-0.2% of V and the balance magnesium. The high-damping lithium-magnesium alloy contains the dual phases. The material has the mechanical properties of traditional lithium-magnesium alloy: the elastic modulus is 50.70 GPa, the yield strength is 90-120MPa, the tensile strength is 140-160 MPa, and the elongation percentage is 6-18%. The high-damping lithium-magnesium alloy has the high damping performance which the traditional lithium-magnesium alloy does not have, SDC = 40-45%, while the SDC of the traditional material is about 30%. The alloy is subjected to induction smelting under the protection of argon, a smelting processing method is simple, and the production cost is lower. While the damping performance is ensured, the service life of the alloy is further prolonged, and large-scale industrialized application is facilitated. The high-damping lithium-magnesium alloy can be used for manufacturing structural parts with the use temperature of 100 DEG C or below and have a very remarkable damping effect.

The invention discloses a corrosion-resistant Au-Li-Os gold-lithium alloy for electrical contact materials. In terms of weight percentage, the chemical composition of the alloy is: Li:0.2‑0.6wt.%, Os:0.2‑0.3wt.%, Ca:0.5‑1.5wt.%, Sb:0.2‑0.4wt.%, Sn:1.0‑ 1.5wt.%, Co: 0.4‑0.5wt.%, Mo: 0.1‑0.2wt.%, Pd: 0.2‑0.4wt.%, Si: 0.1‑0.2wt.%, B: 0.2‑0.4wt.%, The balance is gold. Compared with traditional electrical contact gold alloys, the material has excellent mechanical properties, high electrical conductivity and high corrosion resistance.

The invention discloses an additive for increasing the martensite temperature of a Mn-Cu damping alloy and a use method of the additive. The additive is prepared from following components in part by weight: 4-8% of Zn, 1-2% of Eu, 1-3% of Al, 0.2-0.4% of Hf, 2-3% of Ce, 1-2% of Cr, 4-8% of Sn and the balance Fe. On the basis of guaranteeing the damping performance and the mechanical performance of the existing Mn-Cu-based damping alloy for deformation and with the manganese content of 40-60%, the martensite temperature of the alloy is increased to about 60-90 DEG C. Thus, the high damping performance of the alloy can be obtained through furnace cooling after homogenizing treatment for 12 hours at the temperature of 900 DEG C after casting is completed, and no annealing treatment for 4 hours at the temperature of about 425 DEG C is needed.

The invention discloses Li and Sn gold alloy for 14K red gold with low-temperature brittle fracture inhibition. The alloy comprises, by weight, 0.2-0.4wt.% of Li, 0.4-0.6wt.% of V, 1.5-1.8wt.% of Sn,2.0-2.4wt.% of Al, 12.0-20.0wt.% of Ag, 57.0-59.0wt.% of Au and the balance of copper. The problem about lag in technology that existing 14K red gold materials are low-temperature brittle is solved; through innovation and optimization of alloy composition, the bottleneck of the 14K red gold material for jewelry is broken through; the implementation of the material and the industrialization can predictably achieve substantial economical results and social benefits.

The invention discloses a high-wear-resistance high-thermal-conductivity zinc alloy containing strontium and sodium. The alloy comprises, by weight, 0.8-1.2wt% of Na, 0.2-0.3wt% of Sr, 4. 5-6.3wt% ofIn, 0.8-1.2wt% of Zr, 0.4-0. 8wt% of Si, 2.4-3.6wt% of Sn, 0.2-0.5wt% of Yb, 0.1-0.2wt% of Nd, 0.8-1.0wt% of S and the balance of zinc. Compared with a traditional zinc alloy, the high-wear-resistancehigh-thermal-conductivity zinc alloy containing strontium and sodium has excellent mechanical property and heat conduction performance.

The invention discloses an aluminum-lithium alloy with extremely excellent die-casting performance when smelted between 700-800 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Li: 4.0‑8.0wt.%, Sr: 1.0‑1.5wt.%, Si: 2.0‑3.0wt.%, Mg: 1.0‑1.5wt.%, Ge: 0.5 ‑1.2wt.%, Th: 0.1‑0.3wt.%, Nd: 0.2‑0.5wt.%, B: 0.5‑1.2wt.%, and the balance is aluminum. The aluminum-lithium alloy material has good casting properties and is suitable for pressure casting of thin-walled parts under a protective atmosphere. It is especially suitable for casting lightweight structural materials that require lightweight features, and has a huge market prospect.

The invention discloses a high-strength aluminum-yttrium alloy containing Ca and Hf for pressure casting and a processing process thereof. The high-strength aluminum-yttrium alloy containing Ca and Hfis prepared from chemical components: by weight percent, 0.8-2.0 wt.% of Y, 0.6-0.8 wt.% of Ba, 2.5-3.2 wt.% of Zn, 0.6-1.5 wt.% of Ca, 0.4-0.9 wt.% of Cu, 0.1-0.2 wt.% of Zr, 0.2-0.5 wt.% of Hf, 0.6-0.8 wt.% of Er and the balance aluminum. The aluminum-yttrium alloy material has good casting performance, and is suitable for pressure casting of thin-wall parts under a protective atmosphere. The aluminum-yttrium alloy material is especially suitable for casting light-type-structure materials requiring lightweight characteristics, and has broad market prospects.

The invention discloses a beryllium containing single phase alpha magnesium-lithium alloy and a processing technology thereof. The alloy is composed of the following components in percentage by weight: 2.0 to 4.0 wt.% of Li, 0.1 to 0.4 wt.% of Be, 0.2 to 0.4 wt.% of Co, 1.0 to 3.0 wt.% of Cu, 0.2 to 0.4 wt.% of Ge, 0.1 to 0.2 wt.% of Hf, 0.2 to 0.4 wt.% of Sb, 0.6 to 0.8 wt.% of Al, and the balance being magnesium. The formula of the alloy is optimized, the melting technology and heat treatment parameters are also optimized, the high temperature phase and strengthening phase of the magnesium-lithium alloy are perfectly matched, and finally the multi-component magnesium-lithium alloy with a strong heatproof performance is obtained. At a room temperature, the magnesium-lithium alloy has thefollowing indexes: yield strength: 120-140 MPa, tensile strength: 170-190 MPa, and elongation rate: 6-14%. At a temperature of 100 DEG C, the magnesium-lithium alloy has the following indexes: yield strength: 110-130 MPa, tensile strength: 150-160 MPa, and elongation rate: 18-20% The alloy melting method is simple, the production cost is low, and the alloy is suitable for industrial large scale application.

The invention discloses Li-containing and Re-containing gold alloy capable of inhibiting low-temperature brittleness and used for 10K red gold. The alloy comprises the following components in percentage by weight: 0.2 to 0.4 percent of Li, 0.3 to 0.5 percent of Re, 0.2 to 0.3 percent of Ti, 3.0 to 4.5 percent of Sn, 25.0 to 32.0 percent of Ag, 41.0 to 43.0 percent of Au and the balance of copper.The patent solves the existing conditions that the current 10K red gold material has low-temperature brittleness and the technology falls behind. The development bottleneck of the 10K red gold material for jewelry is broken through by innovating and optimizing the alloy components. Through prediction, implementation and industrialization of the material can achieve plenteous economic gain and social benefit.

The invention discloses a beryllium containing double phase alpha+beta magnesium-lithium alloy and a processing technology thereof. The alloy is composed of the following components in percentage by weight: 6.0 to 10.0 wt.% of Li, 0.2 to 0.4 wt.% of Be, 1.0 to 3.0 wt.% of Sb, 0.2 to 0.4 wt.% of Cr, 0.1 to 0.2 wt.% of V, 0.2 to 0.4 wt.% of Pb, 0.2 to 0.3 wt.% of Se, and the balance being magnesium.The formula of the alloy is optimized, the melting technology and heat treatment parameters are also optimized, the high temperature phase and strengthening phase of the magnesium-lithium alloy are perfectly matched, and finally the multi-component magnesium-lithium alloy with a strong heatproof performance is obtained. At a room temperature, the magnesium-lithium alloy has the following indexes:yield strength: 120-145 MPa, tensile strength: 170-195 MPa, and elongation rate: 7-12%. At a temperature of 100 DEG C, the magnesium-lithium alloy has the following indexes: yield strength: 120-140 MPa, tensile strength: 165-170 MPa, and elongation rate: 12-16% The alloy melting method is simple, the production cost is low, and the alloy is suitable for industrial large scale application.

The invention discloses a Mg-Li-Al alloy with combustion resistance when smelted between 680-780 degrees and a processing technology thereof. In terms of weight percentage, the composition of the alloy is: Li: 10.0‑12.0wt.%, Al: 1.0‑4.0wt.%, Ca: 2.0‑6.0wt.%, Mn: 0.1‑0.6wt.%, Nb: 0.1‑ 0.2wt.%, Pr: 0.1‑0.2wt.%, B: 0.1‑0.2wt.%, In: 0.6‑0.8wt.%, and the balance is magnesium. The present invention provides a novel material science solution for the current situation that Mg-Li-Al magnesium-lithium alloys need to be protected and smelted during smelting at high temperatures. By optimizing the main and secondary additive elements in the alloy, the type, composition and content of the oxide film and nitride film formed on the surface of the melt can be changed, so as to effectively prevent the burning of the magnesium-lithium alloy in the atmospheric state. The obtained Mg-Li-Al magnesium-lithium alloy material has the mechanical properties of traditional magnesium-lithium alloys at room temperature, and has high-temperature mechanical properties that traditional Mg-Li-Al magnesium-lithium alloys do not have: at 150 degrees, the yield strength is 100-120MPa , while traditional materials have a yield strength of about 65MPa at 150 degrees.

The invention discloses a single-phase α-magnesium-lithium alloy with extremely high thermal conductivity and a processing technology thereof. According to weight percentage, the composition of the alloy is: Li:2.0‑5.5wt.%, Al:1.0‑2.0wt.%, Zn:1.0‑3.0wt.%, Cr:0.2‑0.4wt.%, Hf:0.1‑ 0.2wt.%, Ce: 0.1‑0.2wt.%, Gd: 0.1‑0.3wt.%, Sn: 0.5‑1.0wt.%, and the balance is magnesium. The invention provides a very high thermal conductivity single-phase α-magnesium-lithium alloy. The material has the mechanical properties and damping properties of traditional magnesium-lithium alloys: the elastic modulus is 50-70GPa, the yield strength is 90-120MPa, the tensile strength is 140-160MPa, and the elongation is 6-18%. And it has high thermal conductivity that traditional magnesium-lithium alloys do not have: the thermal conductivity is 110-120W / m.K, and the traditional magnesium-lithium alloy is about 80W / m.K. While ensuring the mechanical properties of common magnesium-lithium alloys, the heat transfer coefficient of the alloy can be increased by about 50%. This enables the alloy to have further specific applications in the occasions where the heat generation is large and the weight of the device is required, and it is convenient for large-scale industrial application.

The invention discloses single-phase alpha magnesium-lithium alloy with excellent high-temperature mechanical performance and a processing technique of the single-phase alpha magnesium-lithium alloy. The single-phase alpha magnesium-lithium alloy is prepared from the following ingredients by weight percent: 2.0 to 6.0 percent of Li, 0.2 to 0.4 percent of Ca, 0.1 to 0.3 percent of Hf, 0.1 to 0.3 percent of Mo, 0.1 to 0.4 percent of Pb, 0.1 to 0.2 percent of Th, and the balance of magnesium. The invention provides a solution of a novel materials science for the sharp decrease and worsening of mechanical performance of the magnesium-lithium alloy at about 100 DEG C. The material has the mechanical performance of the traditional magnesium-lithium alloy: the elastic modulus is 50 to 70 GPa, the yield strength is 90 to 120 MPa, the tensile strength is 140 to 160 MPa, and ductility is 6 to 18 percent. The single-phase alpha magnesium-lithium alloy has the high-temperature mechanical performance that the traditional magnesium-lithium alloy does not have: the yield strength is 140 to 150 MPa at a temperature lower than 100 DEG C, and the yield strength of the traditional magnesium-lithium alloy is 65 MPa at a temperature lower than 100 DEG C. While the high-temperature mechanical performance is ensured, the service life of the alloy is further prolonged, and the industrialized mass application is facilitated. The magnesium-lithium alloy of the invention can be used at the temperature lower than 100 DEG C and has a significant light-weight effect.

The invention discloses an Al-Li-Mn aluminum-lithium alloy with combustion resistance when smelted between 700-800 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Li: 2.0‑6.0wt.%, Mn: 1.0‑3.0wt.%, Sr: 2.0‑6.0wt.%, Ba: 1.0‑2.0wt.%, Sc: 1.0 ‑2.0wt.%, Pr: 0.1‑0.8wt.%, Tb: 0.2‑0.4wt.%, B: 1.0‑2.0wt.%, and the balance is aluminum. This patent provides a novel material science solution for the current situation that aluminum-lithium alloys need to be protected and smelted at high temperatures. The type, composition and content of the oxide film and nitride film formed on the surface of the melt are changed by screening alloying elements. In the process of melt treatment such as stirring and air blowing, when the surface film is destroyed by violent stirring, it can still be regenerated quickly, successfully preventing the oxidative combustion of the alloy. The obtained alloy surface oxide film and nitride film have very good plasticity and viscosity, can completely spread and cover the alloy surface, and effectively prevent oxygen from invading into the alloy liquid.

The invention discloses an Ag-Li-Sn silver lithium electrical contact alloy with high thermal conductivity and damping and a processing technology thereof. By weight percentage, the chemical composition of the alloy is: Li:0.5‑3.0wt.%, Sn:1.0‑1.5wt.%, Zn:2.0‑4.0wt.%, Ba:0.5‑1.5wt.%, Sr:0.5‑ 1.2wt.%, Pd: 0.2‑0.4wt.%, Zr: 0.2‑0.3wt.%, Th: 0.1‑0.2wt.%, Ce: 0.5‑0.8wt.%, B: 0.5‑1.0wt.%, The balance is silver. Compared with silver alloys used in traditional electrical contact materials, this material has excellent mechanical properties, high electrical conductivity and high damping coefficient.

The invention discloses a Mg-Li-V alloy with combustion resistance during smelting and a processing technology thereof. In terms of weight percentage, the composition of the alloy is: Li:6.0‑18.0wt.%, V:2.0‑6.0wt.%, Ca:2.0‑3.0wt.%, Sr:3.0‑6.0wt.%, Si:1.0‑ 2.0wt.%, Tb: 0.2‑0.4wt.%, Nd: 0.1‑0.2wt.%, Yb: 0.2‑0.3wt.%, B: 1.0‑2.0wt.%, and the balance is magnesium. The invention provides a novel material science solution for the current situation that protective melting of magnesium-lithium alloys at high temperatures needs to be carried out during melting. By screening the alloy elements to change the type, composition and content of the oxide film and nitride film formed on the surface of the melt, a dense and durable protective film is formed on the surface of the magnesium-lithium melt. The ignition temperature of the magnesium-lithium alloy can be obviously increased, and the burning phenomenon of the magnesium-lithium alloy smelted in the atmospheric state can be effectively prevented. The obtained magnesium-lithium alloy material has the mechanical properties of traditional magnesium-lithium alloys at room temperature, and has high-temperature mechanical properties that traditional magnesium-lithium alloys do not have: at 150 degrees, the yield strength is 100-120MPa, while the traditional material at 150 degrees, yields The strength is about 65MPa.

The invention discloses a high-damping Ag-Li-Sn silver-lithium alloy with electrical conductivity close to that of pure silver. In terms of weight percentage, the chemical composition of the alloy is: Li:0.5‑3.4wt.%, Sn:2.6‑3.8wt.%, Be:0.2‑0.5wt.%, Hf:0.1‑0.3wt.%, Sr:0.5‑ 0.8wt.%, Ge: 0.2‑0.4wt.%, In: 0.1‑0.3wt.%, Ta: 0.1‑0.3wt.%, Gd: 0.2‑0.3wt.%, B: 0.2‑0.4wt.%, The balance is silver. Compared with traditional electrical contact silver alloys, the material has excellent mechanical properties, high electrical conductivity and excellent damping properties.

The invention discloses a ultralight flame-retardant and high-damping Al-Mg-Li-Sn aluminum lithium alloy and a machining process thereof. The ultralight flame-retardant and high-damping Al-Mg-Li-Sn aluminum lithium alloy comprises the following chemical components in percentage by weight: 6.0-8.0 wt.% of Li, 8.0-12.0 wt.% of Mg, 2.0-3.0 wt.% of Sn, 2.0-4.0 wt.% of Sr, 0.5-1.0 wt.% of Ca, 0.5-0.8 wt.% of Ge, 0.2-0.6 wt.% of Zr, 0.1-0.2 wt.% of Pr, 0.4-0.8 wt.% of S, 1.2-1.5 wt.% of B, and the balance of aluminum. The material has the mechanical performances of a traditional aluminum lithium alloy, and achieves low density and high damping performance, which are not owned by the traditional aluminum lithium alloy; SDC is 3-10%; and SDC of the traditional material is about 0.5-0.8%.

The invention discloses a single-phase β-magnesium-lithium alloy with excellent casting performance and heat transfer performance and a processing technology thereof. According to weight percentage, the composition of the alloy is: Li: 13.0‑18.0wt.%, Cu: 1.2‑2.3wt.%, Bi: 0.4‑0.6wt.%, Sb: 0.2‑0.5wt.%, V: 0.1‑ 0.2wt.%, W: 0.1‑0.2wt.%, Ag: 0.8‑1.2wt.%, Ge: 0.3‑0.6wt.%, Co: 0.1‑0.2wt.%, and the balance is magnesium. The magnesium-lithium alloy for die-casting has high thermal conductivity that traditional magnesium-lithium alloys do not have. This enables the alloy to have further specific applications in the occasions where the heat generation is large and the weight of the device is required, and it is convenient for large-scale industrial application.

The invention discloses an aluminum-strontium alloy with extremely excellent die-casting performance when smelted between 700-800 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.0‑1.6wt.%, Ca: 0.4‑0.5wt.%, Ge: 1.2‑1.5wt.%, Ru: 0.4‑0.6wt.%, V: 0.2 ‑0.5wt.%, Ti: 0.1‑0.2wt.%, Sm: 0.2‑0.3wt.%, Eu: 0.1‑0.2wt.%, and the balance is aluminum. The aluminum-strontium alloy material has good casting properties and is suitable for pressure casting of thin-walled parts under a protective atmosphere. It is especially suitable for casting lightweight structural materials that require lightweight features, and has a huge market prospect.

The invention discloses an Al-Li-Ta aluminum and lithium alloy and a machining technology thereof. The Al-Li-Ta aluminum and lithium alloy is smelted at the temperature of 700-800 DEG C and has a combustion resistant property. The Al-Li-Ta alloy is composed of, by weight, 2.0-6.0% of Li, 1.0-2.0% of Ta, 2.0-8.0% of Sr, 1.0-4.0% of In, 0.2-0.6% of Gd, 0.2-0.4% of Dy, 0.1-0.2% of Ho, 1.0-2.5% of B and the balance aluminum. By adopting the optimized alloying method, the utilization amount of the alloy elements can be reduced greatly, a very good combustion resistant effect can be achieved, and the combustion point of the alloy rises sharply while the content of the combustion resistant elements is reduced obviously. The purpose that the alloy can be subjected to heat preservation and standingfor 5 hours without obvious combustion under the atmosphere environment within the range of 700-800 DEG C. The alloy material has the mechanical property of a traditional aluminum and lithium alloy,the yield strength is 400-650 MPa, the tensile strength is 500-750 MPa, and the ductility is 4-15%. Meanwhile, the alloy has the high heat conductivity property which the traditional aluminum and lithium alloy does not have, the heat conductivity coefficient is 120-140W / m.K, while the heat conductivity coefficient of the traditional aluminum and lithium alloy is about 85W / m.K.

The invention discloses a rose copper alloy with brittlement resistance, wear resistance, low cost and rose color. The alloy comprises the following components in percentage by weight: 1.2-1.4 wt.% ofIn, 0.4-0.6 wt.% of Ca, 1.8-2.5 wt.% of Ti, 0.2-0.3 wt.% of C, 2.0-3.5 wt.% of Mg, 0.6-0.8 wt.% of Ru, 4.0-5.0 wt.% of Pd, 60.0-65.0 wt.% of Cu, and the balance of silver. The invention provides therose copper alloy not existing on the market yet; and the alloy is excellent in wear resistance. When the types of copper alloys for jewelries are greatly enriched through advanced material design, the cheap rose material is provided to the market.