32results about How to "Eliminate the annealing process" patented technology

The invention discloses a steel for mooring chains with high strength, corrosion resistance and high toughness and a production process thereof. Its chemical composition (wt%) is: C 0.18-0.25%, Si 0.10-0.35%, Mn 1.40-1.80%, Cr0.80-1.40%, Ni 0.60-1.20%, Mo 0.40-0.70%, Nb 0.02-0.06 %, Al0.02-0.06%, S≤0.010%, P≤0.020%, B≤0.005%, Cu≤0.20%, Sb≤0.010%, Sn≤0.03%, As≤0.04%, [O]≤0.0018% , [N]≤0.0060%, the rest is Fe. The present invention avoids the generation of martensitic structure through the composition optimization design, so that when the base metal does not adopt an annealing process, the material structure will not change and produce central cracks after a long time of storage, and the precious metal Ni is saved at the same time. The invention adopts RH/VD to degas and remove inclusions, which can significantly improve the cleanliness of steel, and reduce energy consumption and cost by adopting converter smelting.

A manufacturing method of a stress NMOS device comprises the followings: semiconductor substrates with grid structures are offered; a source electrode and a drain electrode are formed in the semiconductor substrates at two sides of the grid structures; wherein after the grid structures are formed and before the source electrode and the drain electrode are formed, or after the source electrode and the drain electrode are formed, the method further comprises the following steps: ions are implanted, and carbon impurities are doped in the semiconductor substrates at two side of the grid structures; solid phase epitaxy process is carried out to facilitate the carbon impurities react with silicon to form a strain silicon carbide layer. The invention also provides a manufacturing method of the stress CMOS device. Carbon in the strain silicon carbide layer in the stress MOS device formed by the invention has comparatively high content, the stress applied to an NMOS conducting channel by an epitaxial layer of a silicon carbide material is greatly increased; the mobility of carriers can be effectively improved, thus enlarging the drive current and improving the performance of the NMOS device.

The invention relates to a magnesium alloy processing method, in particular to a method for rolling high-ductility and high-scalability Mg-Al series magnesium alloy plates. The method comprises the steps of milling, heating and heat preservation of a plate, heating and heat preservation of a roller, rolling and cooling, wherein the rolling speed is 10-100 m/min; the rolling reduction of each time of rolling is 45%-80%. As the high-speed single-pass big-dependent-variable rolling is adopted for inducing obvious dynamic recrystallization, fully fine equiaxed grains are generated, and accordingly, the magnesium alloy plates of which the ductility and the scalability are greatly improved are acquired. Besides, as the annealing process is omitted, the manufacturing cost is greatly lowered, and the method is more suitable for large-scale industrial production.

The invention relates to a production method of an alloy steel roller, which comprises the following steps: 1) smelting; 2) furnace pretreatment; 3) casting; 4) rough machining; 5) quenching; 6) tempering; 7) finish machining. Compared with the prior art, the method provided by the invention has the advantages that (1) ferrous sulfide is used as an alterant, the produced alloy steel roller has the advantages of high temperature resistance, self-lubrication, wear resistance and the like, and the roller does not need lubrication or needs a little lubrication in application so that the working strength of workers is reduced; (2) without rare metal Co, the production cost is lowered; (3) the method adopts an intermediate frequency furnace for smelting, a horizontal centrifuge for pouring and a common high-temperature resistance furnace for heat treatment, so that the equipment investment is low; moreover, since an annealing process is saved in processing, the production process is simple and reasonable, and the production efficiency is greatly improved.

The invention relates to a laser strengthening process of a piercing plug. The laser strengthening process is characterized by firstly carrying out laser cladding on a transition alloy layer on the surface of a piercing plug matrix and then carrying out laser cladding on the high-strength alloy layer on the transition alloy layer, wherein the alloy powder adopted by the transition alloy layer is the nickel base alloy; the alloy powder adopted by the high-strength alloy layer is the cobalt base alloy. The laser strengthening process has the advantages that the transition alloy layer in the process has lower hardness than the high-strength alloy layer, plays a role in transition for the high-strength alloy layer with high hardness and high wear resistance and can well relieve the surfacing stress, so that even if the plug is not preheated or annealed, the residual surfacing stress can not have great impacts on the tissues of a laser cladding layer, thus effectively avoiding impacting the properties of the cladding layer by annealing, substantially improving the surface hardness and wear resistance of the piercing plug, simultaneously omitting the processes of preheating and annealing and also improving the production efficiency.

A hybrid memory device includes a plurality of regions including a memory cell array region upon which are formed a plurality of memory cells and a logic circuit region upon which is formed a logic circuit device, and is provided with a liner oxide layer formed on a region covering the logic circuit region except the memory cell array region and a cover layer formed on the liner oxide layer while extending to the memory cell array region.

The invention discloses a method for producing a highly-reaming hot-dip galvanized sheet with the tensile strength of 540 MPa and belongs to the technical field of hot-dip galvanized sheets. The technical solution is as follows: (1) preparing molten iron; (2) pretreating the molten iron, and performing converter steelmaking and LF furnace refining; (3) after treatment by the LF furnace, performingtreatment on an ESP production line, so that a hot-rolled strip steel with the thickness of 1.0 4.0 mm is prepared; (4) cooling the hot-rolled strip steel obtained in step (3), reeling the cooled hot-rolled strip steel and putting the same into a warehouse, so that a hot-rolled raw material reel is prepared; and step (5), after the prepared hot-rolled raw material reel is inspected, transferringthe hot-rolled raw material reel to a PGL acid-plating continuous production line for hot galvanizing, so that the hot-dip galvanized sheet is prepared. The tensile strength of the hot-dip galvanizedsheet produced through the method disclosed by the invention is greater than 540 MPa; and compared with a traditional hot-dip galvanized sheet production method, the method disclosed by the inventionhas the advantages that the process procedure is shortened and the energy saving and cost reduction are achieved.

The invention provides a 3003H14 aluminum alloy sheet and a production method thereof. The 3003H14 aluminum alloy sheet comprises the following components in percentage by mass: less than or equal to0.20% of Si, 0.40-0.50% of Fe, less than or equal to 0.15% of Cu, 1.05-1.20% of Mn, less than or equal to 0.05% of Mg, less than or equal to 0.05% of Cr, less than or equal to 0.10% of Zn, 0.01-0.05%of Ti, less than or equal to 0.05% of other single impurity, less than or equal to 0.15% of all impurities in all and the balance being Al. The production method comprises the following steps: carrying out fusion casting, saw cutting, face-milling, ingot casting heating, hot rolling, cold rolling, cleaning, pulling straightening and transverse shear in sequence. The production method has the beneficial effects that the production method can ensure the performances of the product and shorten the production process; the mechanical properties are controlled by hot rolling plus one-pass cold rolling; and the 3003H14 aluminum alloy sheet product with the thickness of 2.0-4.0mm is produced, and the cost is saved.

The invention discloses heat-resistant steel for a corrosion-resistant high-pressure boiler pipe and a production method thereof. The heat-resistant steel comprises the following chemical components of, by weight, 0.13%-0.15% of C, 0.25%-0.30% of Si, 1.00%-1.20% of Mn, 0.35%-0.45% of Cr, 0.25%-0.30% of Mo, 1.00%-1.10% of Ni, 0.50%-0.55% of Cu, 0.015%-0.030% of Nb, 0.015%-0.030% of Al, less than orequal to 0.013% of P, less than 0.003% of S, less than or equal to 0.010% of As, less than or equal to 0.010% of Sn, less than or equal to 0.010% of Pb, less than or equal to 0.010% of Sb, less thanor equal to 0.010% of Bi, less than or equal to 0.035% of As+Sn+Sb+Pb+Bi, less than or equal to 0.02% of V, less than or equal to 0.00015% of [H], less than or equal to 0.0020% of [O], less than or equal to 0.0070% of [N] and the balance Fe. According to the components, the heat-resistant steel for the corrosion-resistant high-pressure boiler pipe and the production method thereof have the advantages that a small amount of Cr elements are added, the Cu-Cr composite effect is utilized, and the high-temperature strength, the creep resistance and the H2S corrosion resistance of the high-pressureboiler pipe are improved.

This invention discloses one inorganic electroluminescence display and its process method and relates to the relative technique field suitable for alternating driving, wherein, the display upper dielectric layer is thicker than the down one; the dielectric layer touching to the light layer adopts high dielectric parameter materials; the light layer is mixed with light semiconductor layer; the said upper dielectric layer is formed by multiple compound medium film. The invention method processes some parts by annealing procedure to omit one light layer annealing process.

The invention discloses a manufacturing method of a diesel engine valve blank. The manufacturing method comprises the following steps of S1, hot upsetting forming, specifically, conducting upsetting on a bar on an electric upset forging machine to form a rough blank and conducting forging and pressing in a die to form a forging blank; S2, heat treatment, specifically, feeding the forging blank into a high-temperature furnace to be subjected to solution treatment immediately after completion of forging and pressing, conducting water cooling to the indoor temperature, conducting heat preservation and aging treatment at 750-780 DEG C for 10-12 h and then discharging the forging blank from the furnace; and S3, deformation strengthening, specifically, feeding the forging blank into a deformation strengthening die within 3-5 s after aging treatment and furnace discharge, conducting forging and pressing at pressure of 6500-17000 KN for 1-3 times, conducting oil cooling on the forging blank tothe indoor temperature to obtain the diesel engine valve blank. Through the manufacturing method, the requirement for the performance of the valve blank can be met, the service life of the valve blank can be prolonged, the production procedures can be reduced, the consumption and production cost of a raw material can be reduced, and the production cycle can be shortened.

A method for manufacturing a MOS device provided by the present invention comprises: forming a first spacer layer covering a first gate structure, a second gate structure, and a semiconductor substrate; performing an ion implantation process on the semiconductor substrate to form an ion implantation region; removing the first spacer layer on the semiconductor substrate in a core device region to expose a portion of the semiconductor substrate; forming an epitaxial silicon layer on the exposed semiconductor substrate, wherein heat is generated during the growth of the epitaxial silicon layer, and ions in the ion implantation region can diffuse to the semiconductor substrate outside the ion implantation region. Thus, the method can replace an annealing process to suppress a hot carrier injection effect and improve the performance of the device. In addition, since a subsequent annealing process is eliminated, processing time can be saved.

The invention discloses a manufacturing device and process of one-stroke drawn high square box-shaped pieces for titanium alloy sheets. Through a conical female die of a two-section structure, manufacturing is completed in various types of biconical female dies through one process step; the one-stroke drawn high square box-shaped pieces can be formed by circular blanks in the biconical female diesthrough square male dies under the condition of blank pressing without blank holders, the upper parts of the female dies are biconical, and the lower parts of the female dies are square; and at the moment, the intersecting lines of the conical surfaces and straight wall planes of the square parts form hyperbolically-drawn edges.