12results about How to "Improve hole reaming effect" patented technology

The present invention relates to the technical field of automobile steel manufacturing, and in particular to a 780MPa grade ultra-high hole expansion performance cold-rolled complex phase steel plate for automobiles and a preparation method thereof. The steel plate is composed of the following chemical components in weight percentage: C: 0.08% to 0.13%; Si: 0.1% to 0.5%; Mn: 1.8% to 2.5%; Cr: 0.25% to 0.6%; Mo: 0.1% to 0.5%; Ti: 0.01% to 0.04%; Nb: 0.01% to 0.04%; B: 0 to 0.0004%; P≤0.02%; S≤0.01%, and the balance is Fe and unavoidable impurities. The final structure is a ferrite + bainite + martensite complex phase structure, and the microstructure is calculated by volume fraction as follows: critical zone ferrite 10% to 20%, oriented epitaxial ferrite ≤10%, bainite 25% to 35%, martensite 35% to 52%. The yield strength of the present invention is ≥600MPa, the tensile strength is ≥780MPa, the yield ratio is relatively high, and the hole expansion rate is ≥70%, which can meet the requirements of automobile manufacturers for high flanging performance.

The invention relates to the technical field of copper-based catalysts, in particular to a copper-based catalyst and a preparation method thereof.The preparation method comprises the steps that a pore-enlarging agent is used for conducting pore-enlarging treatment on aluminum oxide, and a pore-enlarging type aluminum oxide carrier is obtained; fully dissolving copper chloride, samarium chloride and lanthanum chloride by using deionized water, dipping a chambering type alumina carrier in the obtained dissolved solution, standing and filtering to obtain a filter material and a filtrate; carrying out steam explosion treatment on the filter material, then soaking the filter material in the filtrate, standing and filtering to obtain a loaded material; and roasting the loaded material at high temperature to prepare the copper-based catalyst. Starch or methyl cellulose / ammonium bicarbonate is combined to serve as a pore-enlarging agent, the pore-enlarging effect can be greatly improved, steam explosion treatment is carried out, a dissolving solution can be driven to fully enter pore channels of a carrier in a high-pressure environment, and copper, samarium and lanthanum can be driven to be evenly distributed on the surfaces of the pore channels and the carrier in subsequent vaporization flow, so that the pore-enlarging effect is improved. Therefore, the quality of the copper-based catalyst is improved.

The invention discloses a production method for anodizing, chambering and corroding an electrode foil, belongs to the technical field of electrode foils, and adopts ultrasonic waves to generate a cavitation effect in liquid, promote a corrosion process and improve uniform hole forming and performance of an aluminum foil. A domestic plain aluminum foil of 132 microns is used, and proper holes are obtained through three-stage treatment of alkali washing, hole-forming corrosion and chambering corrosion and hole-forming corrosion of a mixed solution composed of sulfuric acid and hydrochloric acid. The polyethyleneimine is added into a reaming phosphoric acid solution to slow down corrosion, aluminum foil holes subjected to three-stage treatment contain Cl <->, metal impurities, phosphoric acid and the like, corrosion is caused to products, and the quality of oxidation films is reduced. Impurities are cleaned through dilute nitric acid, a compact and firm oxidation film is obtained, then sol-gel coating and subsequent formation treatment are carried out, the anode formation chambering corrosion electrode foil is obtained, and the specific capacitance of the foil is effectively improved.

The invention discloses an etching foil corrosion hole expansion device and method, which relate to the technical field of etching foil, and include a working plate and a positioning device, wherein a placing frame is fixedly installed on the top of the working plate, a U-shaped plate is fixedly installed on the front side of the placing frame, a traction device is fixedly installed on the top of the working plate, an etching platform is fixedly installed on the top of the working plate, an etching frame is fixedly installed on the top of the etching platform, a placing groove is opened on the top of the etching frame, a placing rod is fixedly installed inside the placing groove, a displacement device is slidably installed on the circumferential surface of the placing rod, a positioning block moves in a direction close to the foil to drive the positioning rod and the positioning frame to move, the positioning frame moves to contact with the foil to be corroded and performs positioning correction on it, and through pre-positioning correction, it can be ensured that the actual position of the hole is consistent with the design requirements, and the hole position problem caused by position deviation can be avoided.

The utility model discloses an underground while-drilling PDC (Polycrystalline Diamond Compact) micro-reaming drilling tool which comprises a pipe body, two sides of the pipe body are respectively connected with a female buckle and a male buckle, the outer side wall of the pipe body is fixedly connected with a plurality of PDC reaming pieces, the PDC reaming pieces can cut a well wall under the action of centrifugal force in the drilling process, so that the diameter expansion is realized, and the drilling efficiency is improved. Meanwhile, in the process of lifting and lowering a drill column, forward reaming or backward reaming can be achieved, slight dog legs are eliminated, a rock debris bed is stirred, the two containing barrels are detachably arranged on the two sides of the pipe body respectively, the multiple supporting air bags are linearly distributed on one side of each containing barrel, and the supporting assemblies are arranged on the two sides of the pipe body respectively. The supporting assemblies are arranged between the containing barrels and the adjacent supporting air bags. According to the downhole while-drilling PDC micro-reaming drilling tool, the abrasion condition of the PDC micro-reaming drill bit during transportation can be reduced conveniently, and therefore the reaming effect of drilling can be improved conveniently.

A medical stainless steel tube chambering device comprises a grab handle device, a limiting device connected to one end of the grab handle device and a chambering device connected to the other end of the grab handle device, external threads are arranged on the head of the grab handle device, a connecting hole is formed in the tail of the grab handle device, and a set of sliding grooves are formed in three grooves formed in the head of the grab handle device in an annular array. The set of sliding grooves comprises two sliding grooves, a sliding block is connected into each sliding groove in a sliding mode, a hinge joint is arranged on each sliding block, the limiting device comprises three limiting clamps, the three limiting clamps are matched with one another, limiting parts in the limiting clamps are connected with connecting parts, and hinge joint holes are formed in the connecting parts and matched with the hinge joints; the center of the reaming device and the center of the limiting device are located on the same center line, the reaming device is connected to the tail of the grab handle device, and the reaming end of the reaming device penetrates through and extends into the grab handle device through the connecting hole, so that in the reaming machining process of the stainless steel pipe fitting, the production cost and the machining error are reduced, and the reaming effect is improved.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a preparation method and application of a double-alkali metal magnesium aluminate spinel catalyst. The preparation method comprises the following steps: mixing pseudo-boehmite and magnesium nitrate, adding the mixture into water, uniformly mixing, adding a dispersing agent and a precipitating agent, stirring, standing, aging, crystallizing, centrifuging, washing, drying and roasting to obtain a spinel carrier MgAl2O4; the spinel carrier MgAl2O4, a modifier and water are subjected to a reaction, hydrothermal crystallization, centrifugation, washing, drying and roasting are performed, and the treated spinel carrier MgAl2O4 is obtained; and mixing lithium nitrate, calcium nitrate, a pre-precipitating agent and water, performing ultrasonic treatment, heating, concentrating and evaporating, performing equivalent-volume impregnation on the treated spinel carrier MgAl2O4, and performing hydrothermal reaction, centrifugation, washing, drying and roasting to obtain the Li2O-CaO / MgAl2O4 double-alkali metal magnesium aluminate spinel catalyst. The preparation method is simple, and the prepared catalyst is low in cost and high in catalytic activity.

The application discloses a 1300MPa or above grade cold-rolled steel plate with high elongation and high hole expanding performance, which contains Fe and inevitable impurity elements, and also contains the following chemical elements with mass percentage as follows: C: 0.15%-0.30%, Si: 0.3%-0.5%, Mn: 1.8%-2.5%, Al: 0.01%-0.03%, B: 0.001-0.003%, Ti: 0-0.05%, and the mass percentage of C and Mn satisfies C+Mn / 6>=0.52; wherein the microstructure of the cold-rolled steel plate has nano precipitates with an average diameter less than 30nm. In addition, the application also discloses a manufacturing method of the above-mentioned 1300MPa or above grade cold-rolled steel plate, which comprises the following steps: (1) smelting and casting; (2) hot rolling; (3) hot coil heat preservation cover annealing; (4) cold rolling; (5) annealing; (6) isothermal heat preservation treatment; (7) cooling; (8) flattening.

The invention provides high-strength and high-hole-expansion steel. The high-strength and high-hole-expansion steel comprises, by mass, 0.04%-0.12% of carbon, smaller than or equal to 0.1% of silicon, 1.3%-1.7% of manganese, smaller than or equal to 0.002% of sulfur, smaller than or equal to 0.015% of phosphorus, 0.01%-0.03% of niobium, 0.0014%-0.06% of vanadium, 0.1%-0.15% of titanium, 0.08%-0.18% of molybdenum, 0.02%-0.05% of acid-soluble aluminum and smaller than or equal to 0.006% of nitrogen. The high-strength and high-hole-expansion steel prepared by the preparation method disclosed by the invention has relatively good hole expansion property while considering the strength, and is high in practicability and worthy of popularization.

The invention discloses a high-strength steel plate with high reaming performance and a preparation method thereof. The high-strength steel plate comprises the following chemical components in percentage by mass: 0.03%-0.09% of C, 0.07%-0.60% of Si, 1.45%-1.90% of Mn, 0.12%-0.25% of Ti, 0.010%-0.050% of Nb, 0.27%-0.50% of Al, less than or equal to 0.007% of N, less than or equal to 0.020% of P, less than or equal to 0.008% of S, 0.02%-1.0% of Cr and / or 0.10%-0.50% of Mo, and the balance of Fe and inevitable impurities. The steel plate obtained through the method has high ductility, atmospheric corrosion resistance and high reaming performance, the tensile strength is 800-1080 MPa, the yield strength is larger than or equal to 680 MPa, the percentage elongation after fracture A80 is larger than or equal to 10.0%, the uniform elongation Ag is larger than or equal to 5%, the reaming rate is larger than or equal to 40.0%, the weather resistance index is larger than or equal to 1.0, the product structure is mainly composed of ferrite, bainite, carbide and the like, the production process is simple, and the cost is low.

The present invention relates to the technical field of copper-based catalysts, specifically a copper-based catalyst and a preparation method thereof, comprising: using a pore-expanding agent to expand alumina to obtain an expanded alumina carrier; using deionized water to fully dissolve copper chloride, samarium chloride and lanthanum chloride, immersing the expanded alumina carrier in the obtained solution, standing and filtering to obtain filter material and filtrate; steam explosion treatment of the filter material, then immersing it in the filtrate, standing and filtering to obtain a load material; high-temperature roasting of the load material to obtain a copper-based catalyst. The present invention combines starch or methylcellulose / ammonium bicarbonate as a pore-expanding agent, which can greatly improve the effect of pore expansion, and steam explosion treatment, which can drive the solution to fully enter the pores of the carrier under high pressure, and in the subsequent vaporization flow, can drive copper, samarium and lanthanum to be evenly distributed on the surface of the pores and the carrier, thereby improving the quality of the copper-based catalyst.

The invention relates to 1200MPa high-formability complex-phase steel with an aluminum-silicon coating and a preparation method of the 1200MPa high-formability complex-phase steel. A base plate comprises the following chemical components in percentage by weight: 0.18-0.22% of C, 0.4-0.8% of Si, 2.0-2.4% of Mn, less than or equal to 0.02% of P, less than or equal to 0.006% of S, 0.2-0.5% of Mo, 0.3-0.5% of Cr, 0.03-0.06% of Ti, 0.03-0.06% of Cu and the balance of Fe and inevitable impurities, through the ingenious process design and the aluminum-silicon plating solution, the high-formability complex-phase steel with good mechanical property, reaming property and excellent surface quality is realized.