39results about How to "Wide range of process parameters" patented technology

The invention relates to a low-alloy high-strength high-toughness steel plate and a manufacturing method thereof. The low-alloy high-strength high-toughness steel plate comprises the following components in percentage by mass: 0.08-0.25% of C, 0.10-1.00% of Si, 0.50-2.00% of Mn, less than 0.020% of P, less than 0.010% of S, 0.10-2.00% of Cr, 0-1.00% of Mo, 0-2.00% of Ni, 0.010-0.080% of Nb, at most 0.10% of V, at most 0.060% of Ti, 0.0005-0.0040% of B, 0.010-0.080% of Al, 0.010-0.080% of Ca, at most 0.0080% of N, at most 0.0080% of O, at most 0.0004% of H, and the balance of Fe and inevitable impurities. 0.20%<=(Cr/5+Mn/6+50B)<=0.55%, 0.02%<=(Mo/3+Ni/5+2Nb)<=0.45%, and 0.01%<=(Al+Ti)<=0.13%. The Brinell Hardness of the steel plate is 390-460 HB, the yield strength is 900-1100 MPa, the tensile strength is 1100-1400 MPa, the elongation percentage is 11-15%, the -40 DEG C Charpy V-notch longitudinal impact work is greater than or equal to 40J, and the plate thickness can reach 100mm above. Thus, the steel plate implements matching of high strength, high hardness and high toughness, and has favorable machining properties.

The invention relates to a method for deep penetration laser welding of a plate under the assistance of ultrasound. The method is characterized by comprising the following steps that firstly, first base metal (10) and second base metal (11) are machined to form butt joint end faces, and a series of inclined semicircular grooves are machined; secondly, the first base metal (10) and the second base metal (11) are in butt joint and are clamped, and a series of inclined blind holes are formed in a weld bead; thirdly, a first ultrasonic amplitude-changing rod (3) is pressed to the upper surface of a workpiece to be welded; fourthly, a second ultrasonic amplitude-changing rod (4) is fixed to one side of a laser welding head; fifthly, an ultrasonic generation device is started, the ultrasonic frequency is adjusted; sixthly, a laser beam (5) perpendicularly irradiates the upper surface of the workpiece, and the welding process is completed under continuous ultrasonic vibration; and seventhly, after welding is completed, ultrasonic vibration is maintained for 1-2 minutes. In the method, due to the pre-formed inclined blind holes and ultrasonic vibration, weld joint root leakage caused by molten pool downward flowing driven by local evaporation back flushing pressure of the front edge walls of the small holes is avoided.

The invention discloses a printed wiring board chemical copper plating solution which is prepared from the following raw materials in parts by mass: 10-15 parts of chalcanthite, 30-35 parts of sodium hypophosphite, 10-15 parts of boric acid, 12-18 parts of complexing agent, 0.05-0.1 part of stabilizer, 0.5-1.5 parts of catalyst, 0.05-0.1 part of surfactant, 15-18 parts of sodium hydroxide and 300-320 parts of deionized water. By using the sodium hypophosphite as the main reducer, the chalcanthite, boric acid, complexing agent, stabilizer, catalyst, surfactant and sodium hydroxide are added to prepare the chemical copper plating solution; and the chemical copper plating solution is diluted to be used for chemical copper plating on the printed wiring board, thereby achieving the effects of the metallization of the non-conductor surface of the activated printed wiring board and the metallization in the printed wiring board holes. The printed wiring board chemical copper plating solution has the advantages of wide technological parameter range, long service life and no harmful formaldehyde vapor.

The invention provides a metal anti-rust phosphating solution, comprising the following raw materials by concentration: 2 g/L of octylphenol polyoxyethylene ether, 2 g/L of sodium polyoxyethylenelauryl ether sulfate, 2 g/L of diethyl thiourea, 10 g/L of phosphoric acid, 5 g/L of citric acid, 15 g/L of nickel sulfate (NiSO4.6H2O), 10 g/L of ferric sulfate, 10 g/L of zinc dihydrogen phosphate, 5 g/L of ferrocene, 5.0 g/L of sodium perborate, 2 g/L of hydroxyethyl cellulose, 5 g/L of gelatin, 40 g/L of aluminium hydroxide and 5 g/L of graphite. Harmful substances such as nitrate, nitrite, chromate and the like are not adopted, so that the metal anti-rust phosphating solution is environment-friendly. Meanwhile, an anti-rust object of the metal surface can be achieved; and a phosphating film formed by the phosphating solution has good corrosion resistance, thereby completely reaching relevant standards.

The invention discloses components of double-pulse cyanide-free alkali silver electroplating solution and a process. Silver nitrate is used as a main salt, sodium thiosulfate and ammonium thiosulfate are used as complexing agents, sodium metabisulfite is used as an auxiliary complexing agent, sodium sulfate is used as a conductive salt, boric acid is used as a pH value adjustor, and gelatin is added into the plating solution. The operation conditions comprise that the pH value of the plating solution is 4.0 to 4.5, the temperature of the plating solution is 20 to 30 DEG C, and the mechanical stirring speed is 100 to 150rpm. A silver plating layer with fine and compact crystallization can be obtained by adopting double-pulse electroplating, controlling the duty ratio, average current density and working time of the positive and negative pulses and electroplating on pure copper or copper alloy without silver immersion plating pretreatment. The plating solution of the invention has the advantages of simple formulation, easy control, strong even plating and covering capabilities, and high batch production stability. The plating layer has fine and compact crystallization and good appearance luster, and has no peeling, shedding and stripping; and the technology can replace a cyanide silver electroplating process, and can be used as a surface electroplating process for jewelries, artware and parts of electronic products.

The invention discloses a double-fluid composite iron-based bimetal casting method. The melting point of metal of a first layer is not lower than that of metal of a second layer; after the metal of the first layer is poured, a low-carbon steel chiller is used for fast cooling; after cooling is conducted to obtain a certain temperature, the metal of the second layer is poured, and the pouring temperature of the metal of the second layer is not lower than the melting point of the metal of the first layer; and fusion of the metal of the two layers is ensured. Due to the fact that the chiller fast cooling method is adopted, the fusion amount of the metal of the first layer is reduced, components of the metal of the second layer are ensured, and a bimetal composite workpiece with metallurgical bonding is obtained. According to the technological method, the fusion amount of the metal of the first layer is reduced, the components obtained after fusion of the metal of the second layer are ensured, the double-fluid composite qualification rate is increased, and industrial mass production is facilitated.

The invention discloses a method for manufacturing a bi-metal composite material by pouring two layers of molten metal with the cooling speed adjustable. The method comprises the steps that after the first layer of molten metal is poured, water is introduced into a chiller for cooling, and the cooling speed of the first layer of molten metal is adjusted by adjusting the pressure and flow of the cooling water in the chiller or controlling the introduction time of the cooling water; and the second layer of molten metal is poured at the high temperature so that the first layer of molten metal can be fully fused by the second layer of molten metal, due to the fact that controlled cooling measures are taken for the first layer of molten metal, fusion of the first layer of metal achieved through the second layer of metal is guaranteed, superfusion is also prevented, constituents of the second layer of metal are guaranteed, and the bi-metal composite material acquired through metallurgical bonding is obtained. By means of the process method, the qualification rate of composting of the two layers of molten metal is greatly increased; process parameters are simplified; and industrialized production can be conducted conveniently.

The invention provides an injection mold capable of realizing local delayed ejection, and is used for solving the problem that in the prior art, ejection block marks are generated when the mold is used for forming. The injection mold capable of realizing the local delayed ejection comprises a movable mold, a fixed mold, a first straight ejector rod and a first straight ejector block, wherein a forming inner cavity is formed between the movable mold and the fixed mold, the movable mold comprises a driving plate, the first straight ejector rod is arranged in the movable mold, the driving plate can push the first straight ejector rod in the mold closing direction, the first straight ejector block is installed at the end, close to the forming inner cavity, of the first straight ejector rod, afirst elastic piece is arranged at the end, away from the forming inner cavity, of the first straight ejector rod, the first elastic piece is installed at the end, away from the forming inner cavity,of the first straight ejector rod, the first elastic piece is used for tensioning the first straight ejector rod in the movable mold side direction, and in an initial state of the driving plate, a first initial interval is formed between the first straight ejector rod and the driving plate. The injection mold capable of realizing the local delayed ejection can avoid generation of the ejection block marks.

The invention relates to a method for preparing an inorganic binding material for solar cell positive electrode paste and the inorganic binding material obtained through the preparation method. In particular, the method includes the following steps that (1) high temperature smelting powder is prepared, (2) high temperature sintering powder is prepared, and (3) the prepared high temperature smelting powder and the prepared high temperature sintering powder are mixed.

The invention discloses a discontinuous point type blank holder for a fine blanking die and a design method of technological parameters of the discontinuous point type blank holder. The blank holder comprises a point type blank holder body, wherein a group of raised points are uniformly distributed on the lower surface of the point type blank holder body along the shape contour of a part required to be formed through fine blanking; rounded corners are arranged on the raised points; when the thickness of the part required to be formed through fine blanking is smaller than 5 mm, the point type blank holder is single-sided, and the technological parameters are determined; and when the thickness of the part required to be formed through fine blanking is larger than or equal to 5 mm, a group of raised points which have the same parameters with the raised points on the point type blank holder body are arranged on the upper surface of the fine blanking die, and the technological parameters are determined. According to the design method, aimed at fine blanking parts with different thicknesses, the technological parameters of the discontinuous point type blank holder can be effectively determined, the discontinuous point type blank holder can be widely applied to fine blanking, the cost of the fine blanking die is reduced, and the perfectness ratio of the surfaces of the parts is increased.

The invention discloses an Nd-YAG laser cladding method for preparing a thickness adjustable biological ceramic composite coating adopting a bone-like structure. The method includes the following steps: 1, proportionally mixing rare earth, CaHPO4.2H2O and CaCO3 to prepare composite powder; 2, piling the composite powder obtained in step 1 on the surface of a titanium alloy basal body to form a precast coating; 3, performing Nd-YAG laser cladding to the composite powder; so as to obtain the biological ceramic composite coating with high binding force. According to the invention, the rare earth added in raw material improves the stability of an HAP phase structure; the obtained coating is high in bonding strength when bonded with the metal basal body, and is bonded with chemical metal to solve the problem that the biological ceramic coating is easy to fall off; in addition, the raw material is low in price, convenient to purchase and easy to store; the preparing technology is simple, the implementation is easy, and the metal has favorable market application prospect and commercial value.