30results about How to "Guarantee metallurgical quality" patented technology

The invention discloses a micro-alloying tin-zinc eutectic alloy tinless solder that the main constituent is Sn-Zn eutectic alloy, Zn is 8-10wt% and the rest is Sn, adding one or the complex from Ga, P, Al, Ge, and Mg, the content of single alloy element is below 0.1%. The invention extremely maintains the feature of Sn-Zn eutectic alloy, and has the advantages of strong oxidation resistance, simple constituents, easy to recycle, etc.

The invention discloses a manufacturing method of an alloy tubular product. The manufacturing method is characterized in that the method comprises the the steps of melting NS1402 alloy steel to be made into rods; sawing the rods into short cut materials, centering the short cut materials, and manufacturing the short cut materials into centering materials; heating the centering materials to the temperature being 950 DEG C, keeping the temperature for 20-30min, then heating the centering materials to the temperature being 1100 DEG C-1120 DEG C, and keeping the temperature for 15-20min, and subsequently, conducting hot punching on the centering materials to be manufactured into a tube blank; rolling the tube blank by 1 to 5 passes so as to manufacture the tube blank into a cold rolled tube; and conducting protective atmosphere solution treatment on the cold rolled tube to manufacture the alloy tubular product. Due to the adoption of the method, the production process is relatively simple, the yield is high, the production cost is low, the performance of the tubular product is good, and the produced alloy tubular product can be widely applied to the fields such as oil, chemical industry and the like.

The invention discloses an inert atmosphere control device for laser forming and repair. A return air duct (13) is sequentially connected in series with a three-way valve (2) of an exhaust pipe, a dust filter (3), a diaphragm booster pump (4), a pressure gasholder (5), a three-way valve (7) of an air inlet pipe, a dehydrator (8), an argon purifier (9) and a water cooling jacket (10); an air intake pipeline (11) of the water cooling jacket is connected with a water cooling unit (10) and an atmosphere protective cover (1); an exhaust air duct (14) is connected with the three-way valve (2) of the exhaust pipe; both ends of an air intake duct (15) of the air storage tank are respectively connected with the three-way valve (7) of the air inlet pipe and the air intake pipeline (11) in a sealing way; and both ends of an air supplement pipeline (16) are respectively connected with a gas bottle (6) and the pressure gasholder (5). The invention causes work air in a laser forming and repairing process to be cyclically utilized, reduces use and exhaust of argon, saves the running cost, controls contents of oxygen and nitrogen up to 10 ppm in a working process, and ensures the quality of the laser forming and repair.

The invention relates to a titanium and titanium alloy low-cost continuous casting technology and equipment. Under argon protecting or inert gas atmosphere, a plasma gun of at least 65 KW is used as a heat source. Through a crystallizer, a plasma gun and a down-pulling mechanism, continuous casting of titanium and titanium alloy circular and flat cast ingots is achieved. The machining cost of titanium alloy is lowered by about at least 15%. The produced titanium and titanium alloy are even in components, segregation is avoided, and metallurgical quality problems are avoided.

The invention discloses a forging method for a maraging steel disc-shaft integrated forged piece. According to the technical scheme for achieving formation of the disc-shaft integrated forged piece through one heating number, avoiding local idle burning of the forged piece and lowering the production difficulty of the forged piece, the traditional final forging temperature of the maraging steel forged piece is adjusted to 750 DEG C from 820-870 DEG C, the traditional technique that disc upsetting is conducted after rod pulling is changed into the technique that rod pulling is conducted after disc upsetting, then effective protective measures are taken in the deformation process of the forged piece, and the effect that formation of the forged piece is completed through one heating number on the premise that the requirement for the final forging temperature is met is guaranteed. According to the technical scheme, the operability is high, the forging method is suitable for popularization, and the preparation technique for the disc-shaft integrated forged piece and particularly for a large disc-shaft integrated forged piece with the length exceeding 2000 mm is remarkably improved.

The invention relates to the field of materials, belongs to the field of titanium aluminum intermetallic compounds, and in particular, relates to a fine-grain titanium aluminum powder forming method. The invention provides a design method of a cold isostatic pressing formed ladle and a titanium aluminum powder forming method under different powder production processes; and compact sintering is performed on a pressed blank with excellent forming performances. The method comprises the following steps: original spherical prealloying titanium aluminum powder and element powder are respectively mixed on a planet ball mill and a polishing machine; titanium aluminum powder prepared by the method is filled in a rubber ladle for continuous compaction; then, the rubber ladle and a corresponding device are put in a cold isostatic pressing machine for near net shaping; and the formed pressed blank is sintered in a vacuum sintering furnace to form a needed round rod sample or a small component. The method can realize the near net shaping technology of a titanium aluminum powder component, and is fine in structure grain and excellent in internal metallurgy quality and size deviation control.

The invention provides gray cast iron and a smelting method of the gray cast iron, and relates to the technical field of metallurgical materials. The gray cast iron is prepared from nonmetallic alloyelements, metal alloy elements and the balance iron and inevitable impurities, wherein the nonmetallic alloy elements comprise, by mass, 2.8-3.2% of C, 2.2-2.4% of Si, 0.2% or less of P, 0.15% or lessof S, the metal alloy elements comprise, by mass, 0.25-0.35% of Cr and at least one of Mn, Cu, Mo, Li, Sn and Sb, and the total content of the metal alloy elements except for Cr is 1.5-1.6%. According to the gray cast iron, by reasonably designing the chemical ingredients, the gray cast iron can meet performance requirements of machine tool basic parts, waste iron and waste steel can be adopted as main furnace materials, therefore, raw material selection and matching flexibility are improved, and the raw material cost and the production cost are reduced.

The invention relates to a near-net forming method for a thin-wall complex component. According to the method, a metal sheath designed through a special structure is utilized, a local thin-wall structure is placed in an insert plate, powder is adopted for the rest of the thin-wall structure, and densification of the powder and diffusion connection of the powder and the insert plate are achieved through hot isostatic pressing. By means of the method, the problem that in the hot isostatic pressing near-net forming process of powder of a large complex sheet metal structural component, the local thin-wall part is prone to being short of meat due to the fact that powder filling is difficult is solved, net forming is achieved, and the problems that the local thin-wall part is poor in rigidity and cannot be machined are solved. The near-net forming method can be used for forming complex components such as an air inlet channel and a cabin, the forming precision can be improved, and the structural integrity can be improved.

The invention provides a high-strength creep-resistant high-temperature alloy and a preparation method thereof, and belongs to the technical field of metallurgy. The alloy comprises the following components in percentage by mass: 10.00%-12.00% of Cr, 12.00%-18.00% of Co, 5.50%-7.50% of W, 1.50%-3.50% of Mo, 3.00%-4.20% of Al, 3.00%-4.20% of Ti, 1.00%-2.20% of Nb, 0.40%-1.50% of Ta, 0.01%-0.04% of C, 0.01%-0.04% of B, 0.09%-1.20% of Zr, less than 0.10% of Hf and the balance of Ni, and the total mass percentage of gamma'phase forming elements Al, Ti, Nb and Ta in the high-temperature alloy is as follows: 9.5% < = (Al + Ti + Nb + Ta) < = 10.3%; the mass percentage content of a gamma'phase in the high-temperature alloy is 50%-55%, and the mass ratio of Al to Ti in the high-temperature alloy is that (Al/Ti) is larger than or equal to 0.9 and smaller than or equal to 1.0. The alloy and the disc piece of the alloy can be manufactured through the method, and the disc piece of the alloy can meet the requirements of future aviation turboshaft engines for high temperature resistance, high strength and creep resistance.

The invention relates to a medium-frequency induction smelting steel production system. The system comprises a medium-frequency induction smelting furnace, a vacuum circular smelting device, an oxygen gun and spraying gun lifting system, a vacuum charging device and a rail car; the vacuum circular smelting device is arranged above the medium-frequency induction smelting furnace; the rail car drives the vacuum circular smelting device to perform a lifting motion, so that a vacuum groove and a vacuum cover perform a lifting motion in the vertical direction; the oxygen gun and spraying gun lifting system and the vacuum charging device are respectively mounted on the vacuum cover; the oxygen gun and spraying gun lifting system is used for driving an oxygen gun and a spraying gun to freely access the vacuum cover; and the vacuum charging device is used for feeding alloy materials into the vacuum groove in a vacuum state. The system has the advantages of low smelting energy consumption, no environmental pollution, high metal recovery rate and high refining efficiency.

The invention discloses a metallurgy dust mud leaching device. The metallurgy dust mud leaching device comprises a strip bearing base; a dust mud leaching mechanism is arranged on the upper surface ofthe strip bearing base; and a support fixing mechanism is arranged on the lower surface of the strip bearing base. The metallurgy dust mud leaching device has the following beneficial effects: the device is more convenient to use and convenient to perform multiple times of precipitation, filtration and leaching on dust mud in metallurgy, so that the dust mud is precipitated at the bottom of the bearing place, and the dust mud collecting effect is excellent; and through proper heating, the fluidity of mixtures is guaranteed, the continuous operation is convenient, and the metallurgy quality isguaranteed.