674results about How to "Good casting performance" patented technology

The invention relates to a silver alloy wire and a preparation method thereof. The silver alloy wire is prepared from the following components of 0.5-10 percent of Au, 0-1 percent of Pt, 1-6 percent of Pd, 0-1 percent of Rh, 0-1 percent of Cu, 0-500ppm of Ln, 0-200ppm of Ce, 0-0.5 percent of Al, 0.7-3 percent of Ti, 0-0.2 percent of Si, 0-0.3 percent of Zn, 0-1 percent of Sn, 0-10 percent of Be and the balance of Ag. A directional continuous casting process is adopted. The prepared silver alloy wire overcomes the problem that the bonded silver wire is easily subjected to sulfur corrosion in the prior art, and has a series of other excellent characteristics.

The present invention discloses aluminum silicon deformable aluminum alloy and the preparation method thereof. According to the weight percentages, the alloy contains 9.0-12.6 percent of silicon, 1.5-4.0 percent of copper, 0.3-0.6 percent of magnesium, 0.1-3.5 percent of bismuth, less than 0.30 percent of iron, less than 0.20 percent of zinc, less than or equal to 0.15 percent of impurity, and aluminum as the residual. The raw material is molten and fined in a reflecting smelting furnace, after Al-Sr intermediate alloy modification to the alloy liquid, cast rods are obtained through semi continuous casting, and after hot extrusion and deformation to the cast rods, the aluminum silicon deformable aluminum alloy is produced through forging and T6 heat treatment. After adding the element bismuth into the alloy, the present invention greatly enhances the wear-resisting performance of the alloy, leads the alloy to have self lubricating property, prolongs the service life of the product produced with the alloy, reduces the use cost, and leads the alloy to have the tensile strength of above 390 MPa, the elongation rate after breaking of 6 percent, and the hardness degree of 136-141 HB. The present invention is mainly used for producing vehicle components of wheels, pistons, bearings, and two-side swash plates of vehicles and motorcycles which have high demands on the intensity, the toughness and the abrasion resistance.

The invention relates to aluminum-silicon-magnesium casted aluminum alloy and a casting process thereof. The aluminum alloy contains the following elements by mass: silicon 6.5 to 7.5, magnesium 0.40 to 0.60, titanium 0.10 to 0.30, strontium 0.01 to 0.03, iron no more than 0.20, copper no more than 0.10, zinc no more than 0.20, manganese no more than 0.10, beryllium no more than 0.01 and vanadium no more than 0.20, with the balance being aluminum. The casting process for the aluminum alloy comprises the following steps: putting A356.2 aluminum ingots in a furnace for melting; adding a modification material for refining; standing the product obtained in the previous step for a predetermined time and carrying out casting; sequentially carrying out solid solution, cooling, transfer and aging treatment. The invention enables the problems of low strength and elongation percentage of aluminum-silicon alloy and poor casting performance and corrosion resistance of aluminum-copper alloy and aluminum-zinc alloy to be overcome and tensile strength, toughness and casting performance of the aluminum alloy to be improved, and enables the aluminum alloy to have the advantages of low cost and good corrosion resistance.

The invention discloses a preparation method of a large-size aluminum alloy ingot, relating to a preparation method of aluminum alloy ingots, and the provided preparation method of a large-size aluminum alloy ingot solves the problem of easy cracking during preparing the large-size aluminum alloy ingots by the traditional aluminum alloy ingot preparation method. The method comprises the following steps of: spreading and scattering a NO. flux at the bottom of a smelting furnace; adding aluminum ingots, electrolytic copper, zinc ingots, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, aluminum-manganese intermediate alloy, aluminum-chromium intermediate alloy and aluminum-titanium intermediate alloy into the smelting furnace and spreading and scattering a covering agent; heating to ensure that the materials are smelted, sequentially adding a zirconium composite salt and magnesium ingots as well as smelting and refining to obtain an aluminum alloy melt; filtering the aluminum alloy melt and then pouring into a crystallizer; and finally, obtaining the large-size aluminum alloy ingot through casting. The thickness of the ingot prepared by using the method is 500-600mm, the width is 1,600mm, and the length is 1,500-2,500mm. The ingot has no cracks, good surface quality and uniform internal grains, and the yield is not smaller than 65 percent.

A nickel base superalloy suitable for the production of a large, crack-free nickel-base superalloy gas turbine bucket suitable for use in a large land-based utility gas turbine engine, comprising, by weight percents:

• • Chromium 7.0 to 12.0
  • Carbon 0.06 to 0.10
  • Cobalt 5.0 to 15.0
  • Titanium 3.0 to 5.0
  • Aluminum 3.0 to 5.0
  • Tungsten 3.0 to 12.0
  • Molybdenum 1.0 to 5.0
  • Boron 0.0080 to 0.01
  • Rhenium 0 to 10.0
  • Tantalum 2.0 to 6.0
  • Columbium 0 to 2.0
  • Vanadium 0 to 3.0
  • Hafnium 0 to 2.0 and

remainder nickel and incidental impurities.

The invention, belonging to the field of high-intensity alloy steel, relates to a preparation method of a Nb, Ti alloyed low-carbon high-intensity high-plasticity twinning induced plasticity (TWIP) steel. The steel comprises the following ingredients: 0.05-0.10 wt% C, 23.5-27 wt% of Mn, 0.01-0.03wt% of Si, at most 1.0 wt% of Al, at most 0.01 wt% of P, at most 0.02 wt% of S, 1.0-2.5 wt% of Nb, 0.5-1.25 wt% of Ti, 0.02 -0.08 wt% of N, and the balance consisting of Fe and inevitable impurities. The preparation method comprises the following steps: melting the ingredients and then casting into a casting blank, heating the casting blank and then carrying out hot rolling at the opening rolling temperature of 1100-1150 DEG C with multiple passes and small press quantity to obtain the accumulated deformation degree of more than 60 % at the temperature of more than 950 DEG C, processing the casting blank in a finishing rolling mode at the temperature of 850-900 DEG C, after the hot rolling, rapidly cooling to 400-550 DEG C for reeling, carrying out cold rolling on the steel plate processed by hot rolling with the thickness of 0.5-3.0 mm, preserving the steel plate processed by cold rolling at the temperature of 650-850 DEG C for 3-30 min, and then rapidly cooling to room temperature with the cooling rate of 10-50 DEG C/s. The material prepared by the method can be applied in automobile manufacturing industry. The material has the yield strength of more than 550 MPa and the elongation rate of no less than 60 %, thereby obviously improving the ability of anti-collision and impact of automobile for the first time and greatly increasing the crashworthiness indexes.

The invention discloses a preparation method of a large-size aluminum alloy ingot, relating to a preparation method of aluminum alloy ingots and solving the problems of easy cracking and difficult forming during preparing the large-size aluminum alloy ingots by the traditional aluminum alloy ingot preparation method. The method comprises the following steps of: spreading and scattering a NO.1 flux at the bottom of a smelting furnace; adding aluminum ingots, electrolytic copper, zinc ingots, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, aluminum-manganese intermediate alloy, aluminum-chromium intermediate alloy and aluminum-titanium intermediate alloy into the smelting furnace and spreading and scattering a covering agent; heating to ensure that the materials in the smelting furnace are smelted; adding magnesium ingots and then smelting; then refining to obtain an aluminum alloy melt; filtering the aluminum alloy melt and then pouring into a crystallizer; and finally, obtaining the large-size aluminum alloy ingot through casting. The thickness of the prepared ingot is 500-600mm, the width is 600mm, and the length is 2,000-3,500mm. The ingot has no cracks, good surface quality and uniform internal grains, and the yield is not smaller than 90.5 percent.

The invention discloses a high-Ni-Cu alloy glass mold and a method for manufacturing the same. The high-nickel-copper alloy glass mold is prepared from the following components by mass ratio: 8.5-10.5% of Al, 14.0-16.0% of Ni, 7.5-9.5% of Zn, 0.8-1.2% of Si, 0.8-1.2% of Fe, 0.08-0.15% of Mn and the balance of Cu. The method for preparing the high-Ni-Cu alloy glass mold comprises the following steps: preparing a Zn-Cu alloy, wherein the mass ratio of Zn and Cu is 45:55, determining the use amount of the raw materials for preparing the high-Ni-Cu alloy glass mold, the Zn-Cu alloy and the electrolytic copper according to the mass ratio of the components for preparing the high-Ni-Cu alloy glass mold, smelting the raw materials and the electrolytic copper in an intermediate-frequency furnace until the temperature reaches 1,200-1,240 DEG C, adding the Zn-Cu alloy, heating until the smelting temperature reaches 1,280-1,300 DEG C, preserving temperature and casting at 1,260-1,280 DEG C, and carrying out stress-relief annealing. The high-Ni-Cu alloy glass mold disclosed by the invention has the advantages of high heat conductivity and heat resistance and good corrosion resistance and can adapt to the high-speed production requirements of the high-speed bottle making machine.

The invention relates to an aluminum alloy material, in particular to an extrusion casting Al-Si-Cu alloy prepared by solution heat treatment (T4 heat treatment) and solution heat treatment plus full artificial aging (T6 heat treatment) processes; the main components and the mass percentage thereof are as follows: 5.30 percent to 6.20 percent of silicon, 3.80 percent to 4.30 percent of copper, 0.60 percent to 0.91 percent of trace alloy strengthened element, 0.20 percent to 0.30 percent of impurity element iron, and the rest are aluminum and inevitable trace impurities. The material not only has quite high strength and good plasticity, but also has good casting shaping performance, low raw material cost and convenient sources, is in particular applicable in manufacturing parts with light weight and less weight requirements, and has very broad application prospect in automobile, aviation and other industries.

The invention relates to a lost foam-shell mold casting vibration and solidification method based on a foam mold, comprising the following steps of: (1) manufacturing the foam mold with a ceramic shell on a surface thereof; (2) after the foam mold is subjected to lost foam mold and baking, putting the foam mold into a bottom-drawing sandbox, filling scattered molded dry sand into the bottom-drying sandbox, closing a vibrating table after vibrating and compacting the scattered dry sand pass through the vibrating table, coating a layer of plastic film on the upper part of the bottom-drawing sandbox, and placing a pouring cup on the upper part of the bottom-drawing sandbox to be poured; and (3) opening a vacuum device and the vibrating table, injecting metal liquid into a ceramic shell through the pouring cup, vibrating and solidifying, closing the vibrating table and the vacuum device after the metal liquid is solidified into a cast completely, and opening the sandbox to perform cleaning. The lost foam-shell mold casting vibration and solidification method based on the foam mold is simple, lower in cost, convenient to operate and environmental-friendly. An effective method with the characteristics of convenience, quickness, low cost, environmental-friendly grain size of refined casts and enhanced performances of the casts is provided for lost foam-shell mold casting enterprises.

A piston and cylinder assembly for an engine is disclosed. The assembly includes a piston including an aluminum alloy piston body having a crown and a skirt extending from the crown. The skirt has an exterior surface having a surface finish in a wave form with peaks and valleys, and having a roughness total between approximately 6 and 12 micrometers, the roughness total (Rt) being defined as the difference between the highest peak and lowest valley within an assessment length. The surface finish has an approximate peak-to-peak distance between 0.17 and 0.25 millimeters within the assessment length. The exterior surface is coated with a nickel ceramic composite coating. An aluminum alloy cylinder bore is disposed in an engine block and is configured to receive the piston body. The cylinder bore has a bore surface having a roughness average (Ra) between approximately 0.09 and 0.25 micrometers. The cylinder bore may be made of a eutectic Al—Si alloy including other alloying elements.

The invention discloses a high-strength and high-toughness heat-treatment-free aluminum alloy material and a preparation method, and belongs to the technical field of aluminum alloy casting. The high-strength and high-toughness heat-treatment-free aluminum alloy material comprises the following components in percentage by mass: 8.0-10.5% of Si, less than or equal to 0.15% of Fe, 0.05-0.3% of Mg, 0.05-0.3% of Zn, 0.3-0.6% of Mn, less than or equal to 0.1% of Cu, 0.05-0.15% of Ti, less than or equal to 0.005% of Ca, 0.005-0.030% of Sr, 0.1-0.3% of Zr, 0.01-0.1% of Mo, 0.01-0.3% of V, less than or equal to 0.02% of Cr, less than or equal to 0.002% of Na, less than or equal to 0.002% of P, less than or equal to 0.01% of Cd, less than or equal to 0.001% of Li, less than or equal to 0.0025% of B, less than or equal to 0.05% of Ga, and the balance Al and inevitable impurities. The alloy does not need to be subjected to heat treatment, and has excellent casting performance and mold filling capacity and good tensile strength, yield strength and toughness.

The invention discloses an easily processed silicon brass alloy. The alloy comprises the following components in percentage by weight: 60-63% of copper (Cu), 0.50-0.90% of silicon (Si), 0.50-0.80% of aluminum (Al), 0.10-0.20% of lead (Pb), less than 0.3% of other elements, and the balance of zinc (Zn) and inevitable impurities, wherein the sum of copper, silicon, aluminum and zinc is more than 99.60%, and other elements are a combination of tin (Sn), manganese (Mn), ferrum (Fe) and nickel (Ni). The invention further comprises a preparation method of the silicon brass alloy. The prepared silicon brass alloy is obviously higher than common lead brass in the performances of tensile strength, elongation rate, hardness and anti-zinc removal, the casting processability is good, practical production and application demands can be met, the precipitation of metals can meet the standard requirements, and the easily processed silicon brass alloy can be widely applied to water heating, valves and other various industries having limit on the precipitation of metal pollutants.

The invention discloses a plunger for a compressor pump body, a production method thereof as well as a compressor and refrigeration equipment. The plunger for the compressor pump body is made from vermicular graphite cast iron, wherein the vermicular graphite cast iron contains the following components in percentage by weight: 3.2%-3.8% of C, 2.0%-3.0% of Si, 0.5%-1% of Mn, not higher than 1.0% of Cu, not higher than 0.3% of P, not higher than 0.06% of S and the balance of iron.

The invention discloses a high-silicon-molybdenum-chromium spheroidal graphite cast iron material for automobile turbine housings and a preparation method thereof. The material comprises the following compositions in percentage by weight: 2.90-3.10% of carbon, 4.40-4.80% of silicon, less than 0.30% of manganese, less than 0.05% of phosphorus, less than 0.02% of sulfur, 0.03-0.05% of magnesium, less than 0.50% of nickel, 0.70-0.80% of chrome, 0.50-0.65% of molybdenum, less than 0.03% of aluminum, less than 0.10% of copper, less than 0.035% of titanium, and the balance of iron (Fe). The preparation method comprises the following steps: putting silicon carbide, pig iron, return materials and scrap steel into a smelting device; after the materials are melted, adding silicon iron, molybdenum iron and chromium iron into the smelting device to carry out refining; carrying out pouring and spectrum analysis on a taken melted material; continuing to heat up the smelting device, adding a low-sulphur recarburizer in the smelting device, and preparing a spheroidizing treatment; putting the obtained material into a spheroidizing bag to carry out wire feeding spheroidizing treatment; putting the spheroidized material into a pouring ladle to carry out inoculation treatment, removing oxidizing slags, and cooling the material; carrying out temperature-drop pouring and cleaning shakeout treatment on material liquid; and carrying out heat treatment on the obtained casting subjected to shakeout, carrying out annealing on the casting until the casting is at room temperature, thereby obtaining a finished product. The material is reasonable in formulation, the preparation process is simple and easy to implement, the prepared material is good in casting and machining performances, low in cost, and ideal in application effect.

The invention discloses a manufacture method of extra super duralumin alloy cast ingots, relating to a manufacture method of cast ingots. The invention aims at solving the problem of low yield due to the inner wall crack of the cast ingots manufactured by the existing casting method. The manufacture method of the extra super duralumin alloy cast ingots comprises the following steps: weighting raw materials, feeding the argon to refine after smelting, and manufacturing the extra super duralumin alloy cast ingots through the semi-continuous casting method. By using the casting method disclosed by the invention, the brittlement region of the aluminum alloy cast ingots is reduced, the heating crack resistance of the alloy is enhanced, the casting stress is reduced, and the casting performance of the extra super duralumin alloy is improved. The molding rate of the cast ingot reaches 62.3% and is enhanced by 7.3%, and the yield reaches 74.1% and is enhanced by 11.8% compared with that of the prior art. The manufacture method disclosed by the invention can be used in the field of manufacturing important structural elements.

The present invention is one kind titanium alloy suitable for making false tooth. The alloy consists of Fe 1-3 wt% Mo 14-18 wt%, Mn 8-13 wt%, Nb 12-22, Zr 6-16 wt% and Ce 0.01-0.3 and the rest is Ti.Compared with available titanium alloy for stomalogical use, the titanium alloy of the present invention has improved biocompatibility, higher compression strength, higher hardness and higher wear resistance.

The invention discloses a raw material composition for producing a high-performance nodular cast iron valve and a production method thereof. The raw material composition comprises the following components in percentage by weight: 50-60% of Q10 pig iron, 15-20% of waste machine parts, 5-10% of scrap steel, 20-25% of scrap iron, 0.5-0.8% of ferronickel, 0.3-0.6% of scrap copper, 0.2-0.3% of scrap tin, 1-1.3% of nodulizer and 1-1.5% of inoculant. By adopting the composition to produce the high-performance nodular cast iron valve, the formula and process are simple, and the industrial production is easy to achieve; the cast part directly obtained from a cast state form has greatly improved performance, and truly belongs to high-performance nodular cast iron; and by adopting common scrap steel, waste machine parts and scrap iron, the raw material cost of high-performance cast part production can be lowered by times.

The invention relates to a high-speed train alloy cast steel brake disc material and a smelting process thereof. The material is composed of iron, carbon, silicon, manganese, chromium, nickel, molybdenum, vanadium, niobium, tungsten, titanium, aluminum, copper, zirconium, phosphorus, sulfur, and the like. The components are mixed according to a certain formula, and smelting is carried out with an acidic high-frequency or medium-frequency induction furnace. The production process provided by the invention is simple. A workpiece obtained after heat treatment has hardness of RC39-45, tensile strength of 1100-1200MPa, yield strength of 1000-1100MPa, and an elongation rate of 7%. The material has good impact strength, good wear resistance, low production cost, and good casting performance.

The invention provides a magnesium alloy, which comprises the following components in percentage by weight: 0.5-1.5% of calcium, 0.5-2.5% of zinc, and the balance of magnesium, wherein the sum of weight percentages is 100%. The invention also provides a melting process of the magnesium alloy, which comprises the following steps: (1) slicing magnesium ingots and removing impurities, and weighing zinc and calcium for standby; (2) preheating a crucible and a die; (3) putting the magnesium slices into the crucible, putting the crucible in a furnace, and after an operation of vacuumizing is completed, feeding mixed gas into the furnace; (4) heating the furnace until the magnesium slices are completely molten, and heating and stirring the obtained product; (5) wrapping metal calcium with an aluminum foil, adding the obtained object in the bottom of molten magnesium, then adding zinc slices, carrying out stirring and slag removal on the obtained mixture, and after the obtained product is heated, carrying out heat preservation on the obtained product; and (6) cooling molten liquid, carrying out heat preservation on the molten liquid, opening the furnace, taking the die, pouring the molten liquid into the die, and waiting. The invention also provides a heat treatment process of the magnesium alloy, which comprises the following steps of (1) homogenized annealing; and (2) solid solution treatment. The magnesium alloy disclosed by the invention has the advantages that the mechanical properties of the alloy are improved, the casting performance is improved, and the creep resistance of the alloy is increased.

The invention relates to a high aluminum-magnesium alloy and the weight percentages of the components are as follows: 10.5 to 11.5 percent of Al, 0.17 to 0.40 percent of Mn, 0.45 to 0.90 percent of Zn, less than or equal to 0.08 percent of Si, less than or equal to 0.004 percent of Fe, less than or equal to 0.025 percent of Cu, less than or equal to 0.001 percent of Ni, 0 to 0.0015 percent of Be and the allowance is Mg. Compared with the existing AZ91D magnesium alloy, the high aluminum-magnesium alloy has the advantages of improving the fluidity and at the same time decreasing the melting points of the alloy and then relatively reducing the cost.