34results about How to "Refined Alloy Structure" patented technology

A lead-free alloy as solder contains Zn (5-10 wt.%), the rare-earth elements chosen from La, Ce, Pr and Nd (0.05-1), one or more of Bi (0.1-6), Cu (0.1-3), In (0.5-3), Al (0.1-1), Ni (0.01-1) and P (0.001-1), and Sn (rest). Its advantages are better wettability, fine structure, excellent mechanical performance, low cost and no poison and pollution.

The invention provides a manufacture process of an automobile power battery enclosure, which comprises the following main steps of: (1) manufacturing aluminum alloy for the automobile power battery enclosure, wherein the aluminum alloy comprises the following components by weight percent: 0.10%<Si<0.60%, 0.40%<Fe<0.70%, 0.05%<Cu<0.20%, Mg<0.05%, 1.05%<Mn<1.25%, 0.15%<RE<0.40%, and 0.05<Ti<0.1, each of other elements is at most 0.05%, the total content of other elements is at most 0.15%, and the balance is aluminum; and (2) smelting the aluminum alloy proportioned by the step (1), casting the smelted aluminum alloy into a billet, and then sequentially carrying out four processes of homogenization, hot extrusion, heat treatment as well as punching and drawing on the billet to manufacture the automobile power battery enclosure. The automobile power battery enclosure manufactured through the process has excellent corrosion resistance, favorable high temperature creep property, and excellent punching-ironing processability and laser welding property, and is suitable for a square-shaped or box-shaped lithium ion battery case.

The invention discloses a novel copper-based dip brazing alloy used in drilling bit production. Cutting drill teeth and a drill body form a whole by dip brazing. The dip brazing copper alloy has excellent mechanical property and high strength, toughness and abrasion resistance. A brazing process is simple and convenient and suitable for brazing drill bits of multiple types. When the brazing temperature is between 900 and 1,000 DEG C, the alloy comprises the following chemical components in percentage by weight: 5 to 10 percent of Ni, 3 to 9 percent of Mn, 3 to 5 percent of Fe, 7 to 13 percent of Sn, 0.1 percent of sigma RE and the balance of Cu. When the brazing temperature is between 950 and 1,150 DEG C, the alloy comprises the following chemical components in percentage by weight: 8 to 15 percent of Ni, 10 to 13 percent of Mn, 5 to 10 percent of Zn, 1 to 2 percent of Fe, 0.05 to 0.1 percent of Ce and the balance of Cu. When the brazing temperature is between 1,100 and 1,250 DEG C, the alloy comprises the following chemical components in percentage by weight: 15 to 20 percent of Ni, 5 to 10 percent of Mn, 3 to 5 percent of Fe, 0.05 to 0.1 percent of sigma RE and the balance of Cu.

The invention relates to a magnesium-stannum-zinc-aluminum wrought magnesium alloy suitable for being extruded. The wrought magnesium alloy comprises the following components in percentage by mass: 3-5% of Sn, 1% of Al, 0.5-2.0% of Zn, less than or equal to 0.10% of inevitable impurities and the balance of Mg. According to the alloy provided by the invention, the Mg-Sn magnesium alloy is subjected to modification treatment by adopting Zn and Al, so that the grains can be refined and the alloy tissue can be improved. Meanwhile, the tensile strength and the ductility of the alloy are improved to facilitate processing and moulding in the later period. The wrought magnesium alloy provided by the invention is simple in preparation method, relatively low in equipment cost and easy to implement.

The invention aims to provide a preparation method of a novel magnesium alloy thick plate. The alloy comprises, by mass, 3.5-5.0% of Al, 2.0-3.5% of Zn, 0.1-0.8% of Mn, 0.01-0.80% of RE, 0.001-0.090%of Ca, less than or equal to 0.005% of Fe, less than or equal to 0.05% of Si, less than or equal to 0.005% of Cu, less than or equal to 0.005% of Ni and the balance Mg, and the total content of impurities does not exceed 0.1%, wherein the sum of the Al content and the Zn content satisfies the condition that Al+Zn is greater than or equal to 6% and less than or equal to 8%. Aiming at a novel Mg-Al-Zn alloy system, a forming process for preparing the large-size magnesium alloy thick plate with low anisotropy and high strength is developed to satisfy urgent demands of such fields as aerospace, weaponry and automobiles on the magnesium alloy thick plate with low cost and high performance.

The invention discloses an air conditioner foil. The air conditioner foil comprises the following components of, in percentage by mass, 0.2% to 0.3% of Si, 1.4% to 1.5 % of Fe, less than or equal to 0.05% of Cu, 0.5% to 0.6 % of Mn, less than or equal to 0.05 % of Zn, less than or equal to 0.03 % of Ti, and the balance Al. The invention also discloses a preparation method of the air conditioner foil. The preparation method of the air conditioner foil comprises the following steps that, raw materials are subjected to smelting and cast rolling according to the components and the mass percentage;the cast-rolled blank is firstly subjected to homogenization annealing, then cold rolling is carried out, and finished product performance annealing is carried out after cold rolling; and a coatingcoats the surface of the finished product. According to the air conditioner foil and preparation method thereof, the machining performance is excellent, the strength is high, the plasticity is good and the flanging height is greatly increased, the problem of flanging cracking in the machining process of air conditioner foil fins is effectively avoided, the machining requirements of a high-speed punching machine are simultaneously met, and the machining efficiency is greatly improved.

The invention relates to compound brazing filler metal used for hard alloy tool brazing. The compound brazing filler metal is composed of 25%-27% of Ag, 37%-39% of Cu, 3.0%-5.0% of Mn, 2.0-4.0% of Ni,1.5%-2.5% of In, 0.5%-1.0% of nano-SiCp, 0.15%-0.3% of Si, 0.1%-0.2% of B, 0.05%-0.1% of Co, 0.01%-0.05% of Fe, 0.01%-0.1% of La, Ce and Y mixed rare earth and the balance Zn, wherein the mixed rareearth includes at least two of La, Ce and Y. A preparation method includes the steps that firstly, raw materials are weighed according to the ratio; secondly, segmented variable-speed high-energy ballmilling is conducted on Cu powder and nano-SiCp to obtain Cu/nano-SiCp particles; thirdly, the Ag, Cu ingots, the Zn, the Mn, the Ni, the Si, the Co and the Fe are placed in a medium-frequency induction smelting furnace to be heated and molten, and then the In, the B, the Cu foil wrapped mixed raw earth and the Cu/nano-SiCp particles are sequentially added in a crucible; fourthly, the mixture ismoved into a well type resistance furnace to be subjected to ultrasonic vibration and squeeze casting forming; and fifthly, hot rolling and cold rolling are conducted on cast ingots to form the foil sheet brazing filler metal. By means of segmented variable-speed ball milling and ultrasonic vibration, uniform dispersion of the nano-SiCp is ensured, the brazing filler metal is good in wettability and joint filling capacity, the brazing manufacturability is good, the preparation method is simple, and the finished product rate is high.

The invention discloses a high-strength aluminum plate for a truck fuel tank and a production method therefor. Pure aluminum ingots, pure magnesium ingots and pure zinc ingots are used as raw materials to be smelted, intermediate alloy ingredients are added to be smelted, and the components of obtained alloy liquid meet the alloy element composition of the aluminum plate; the obtained alloy liquid is sequentially subjected to refining, casting, surface milling, soaking treatment, hot rough rolling and hot finish rolling, and an aluminum alloy blank coil is prepared; cold rolling is performed on the obtained coil to obtain cold-rolled coil materials with two thicknesses of 2.5 mm and 3.5 mm; sequential annealing and cleaning are performed on the obtained coil material with the thickness of 2.5 mm to obtain an O-state finished coil material; and the obtained cold-rolled coil material with the thickness of 3.5 mm is sequentially subjected to intermediate annealing, secondary cold rolling, stabilizing treatment and cleaning, and an H32-state finished product coil is obtained. The product prepared by the invention has excellent mechanical properties, corrosion resistance and punch forming performance, and can effectively solve the technical problem of punch cracking of the fuel tank caused by poor corrosion resistance and low elongation of the fuel tank of the truck.

The invention relates to boron-containing wear-resistant alloy steel and a preparation method thereof. The alloy steel is prepared from the following components in percentage by weight: 0.6-0.9% of C,5-5.8% of Cr, 0.5-1.4% of B, 0.5-0.8% of Ni, 0.6-1.0% of Mn, 0.6-1.0% of Si, 0.35-0.5% of Nb, 1.0-2.0% of W, 0.55-0.75% of Ti, less than 0.03% of S, less than 0.03% of P and the balance of Fe and inevitable impurity elements. The boron-containing wear-resistant alloy steel is prepared by adopting a compound method of modification and mechanical vibration. The preparation method comprises the following steps: adding Ti, Nb and W into molten steel for modification; pouring smelted molten iron into a cast fixed to a vibrating device; and starting the vibrating device after pouring to vibrate themolten steel mechanically. According to the invention, grains can be refined effectively, shapes and distribution of borides in tissues can be improved, and the impact toughness of the material can be improved while the hardness of the material is guaranteed. Moreover, required equipment and process are simple, the adding amount of noble metals is small, the production cost is low, and the boron-containing wear-resistant alloy steel is easily popularized and applied in industrial production.

The invention discloses a high-temperature-resistant and corrosion-resistant magnesium alloy. The magnesium alloy is mainly prepared from the following components in percentage by mass: 4.5-6.9% of Mo, 6.6-8.8% of Zn, 2.3-3.2% of Zr, 0.1-0.6% of Sc, 0.1-0.5% of W, 1.2-1.8% of rare earth elements, and the balance of Mg and unavoidable impurities; and the unavoidable impurities are Ca, Al and the like, and the total amount of the unavoidable impurities is less than 0.05%. The prepared magnesium alloy has high-temperature resistance, corrosion resistance and good toughness, the tensile strength and the yield strength are also improved, the elongation is also increased, and the performance of the magnesium alloy is improved.

The invention discloses a metallic magnesium refining kettle and a preparation method thereof. The metallic magnesium refining kettle is prepared through an evaporative pattern model in a vacuum pumping method. The charging sequence of a smelting furnace comprises heat-resistant steel, high-chromium iron, low-chromium iron, ferromanganese iron, silicon iron and ferro-molybdenum. The casting temperature is 1620+/-5 DEG C. The casting time is 30-50 s. The casting method comprises the steps of conducting casting from a riser on the sidewall of the refining kettle; cleaning and putting a casting body into a heat treatment furnace to be heated at 1050-1100 DEG C and conducting heat preservation for 1.8-2.5 h; putting the casting body into an oil bath to be subjected to oil cooling; grinding theround edge of a kettle opening and removing the riser through machining; and finally detecting whether the refining kettle is qualified or not through ultrasonic waves and then conducting classification and warehousing. The refining kettle prepared through the method has the heat-resistant strength and good heat creep properties and corrosion resistance, and the using safety and reliability of the refining kettle can be greatly improved.

The invention discloses a high-temperature-resistant alloy elbow and a processing technology thereof. The high-temperature-resistant alloy elbow comprises alloy raw materials, by mass, 0.02% of carbon, 0.1-0.15% of nitrogen, 1.3-1.5% of manganese, 20-21% of chromium, 10-12% of nickel, 0.2-0.5% of silicon, 1-1.3% of aluminum, 1.3-1.9% of zirconium, 1-2% of lanthanum, 2-3% of cerium, 0.3-0.8% of neodymium and the balance of iron. According to the formula, smelting and casting forming of an alloy matrix are carried out to obtain the alloy elbow, and the alloy elbow has excellent mechanical properties and high temperature resistance under the formula; and meanwhile, in the smelting process, ultrasonic treatment is carried out, the ultrasonic treatment conditions are limited to be that the ultrasonic power is 1-2kW, and the ultrasonic frequency is 20kHz, in the process, ultrasonic waves can generate the acoustic cavitation effect, local instantaneous high temperature and high pressure can be generated by alloy melt, the effects of dispersing the alloy phase and refining the alloy structure can be achieved, and the mechanical property and the high-temperature resistance of the alloy elbow can be effectively improved.