2383results about "Quenching agents" patented technology

A process for the thermal deposition coating of a workpiece, said process comprising the steps of: (c) thermally depositing a coating on a metallic surface of a workpiece from a deposition head wherein at least one condition selected from the group of: coating deposition rate onto said surface, relative motion between the surface and said deposition head, and cryogenic coolant application rate onto said workpiece is controllable; (d) substantially simultaneously measuring temperatures at a plurality of locations over the metallic surface of the workpiece; (c) determining an average temperature of the temperatures measured in step (b); (d) comparing the average temperature to a preselected minimum temperature and a preselected maximum temperature for the workpiece; and (e) adjusting at least one of the controllable conditions if said average temperature is not between the preselected minimum temperature and the preselected maximum temperature for the workpiece. Standard deviations of all temperature readings and controlling the relative motion speed between the thermal coating deposition head and the workpiece provide another improvement for obtaining temperature uniformity over the workpiece surface.

The technique of the invention manufactures a gas storage tank, which includes a gas absorbent/adsorbent and is capable of storing a high-pressure gas. The manufacturing process of a hydrogen storage tank first assembles a heat exchanger unit and packs the particles of hydrogen storage alloy into the heat exchanger unit. The manufacturing process then blocks hydrogen storage alloy filling holes used for packing the hydrogen storage alloy in the heat exchanger unit and attaches a detachable cover member to a hydrogen inlet. The manufacturing process subsequently locates the heat exchange unit filled with the hydrogen storage alloy in a cylindrical tank and narrows both ends of the tank to form joint openings. The manufacturing process then heat-treating the tank under water cooling and detaches the cover member. The manufacturing process attaches joint assemblies to the joint openings and forms a reinforcement layer around the outer circumference of the tank to complete the hydrogen storage tank.

The invention provides a wear resistant steel plate, comprising the following chemical components (wt%): 0.22-0.35% of C, 0.10-0.40% of Si, 0.60-1.35% of Mn, not more than 0.015% of P, not more than 0.010% of S, 0.010-0.040% of Nb, 0.010-0.080% of Al, 0.0006-0.0014% of B, 0.005-0.050% of Ti, 0.0010-0.0080 wt% of Ca, not more than 0.080% of V, not more than 0.60% of Cr, not more than 1.00 wt% of W, not more than 0.0080% N, not more than 0.0060% of O, not more than 0.0004% of H and the balance of Fe and inevitable impurities, wherein Nb+Ti is not less than 0.025% and not more than 0.080%, and Al+Ti is not less than 0.030% and not more than 0.12%. The production method of the wear resistant steel plate comprises the steps of smelting, casting, rolling and directly cooling after rolling. The wear resistant steel plate obtained through the components and the process has the advantages of high intensity, good low temperature toughness, and excellent mechanical processing performance, and is suitable for easily abrasive devices in engineering and mine machinery, such as a grab bucket, a scraper conveyer and the like.

A machinable austempered cast iron article has improved strength, machinability, fatigue performance, and resistance to environmental cracking. A method of making the machinable austempered cast iron article includes austenitizing an iron composition having a substantially pearlitic microstructure in an intercritical temperature range of between 1380° F. and 1500° F. This produces a ferritic plus austenitic microstructure. The ferritic plus austenitic microstructure is quenched into an austempering temperature range of between 575° F. and 750° F. within 3 minutes to prevent formation of pearlite. The ferritic plus austenitic microstructure is then austempered in the austempering temperature range of between 575° F. and 750° F. to produce a microstructure of a continuous matrix of equiaxed ferrite with islands of austenite. Finally, the microstructure of the continuous matrix of equiaxed ferrite with islands of austenite is cooled to ambient temperature to produce the machinable austempered cast iron article.

A method and apparatus for improving the surface finish and/or surface integrity of a workpiece formed or shaped with a tool increase the surface hardness of the workpiece during forming or shaping of the workpiece. A method and apparatus for forming or shaping a workpiece also increase the surface hardness of the workpiece during forming or shaping of the workpiece with a tool, as do a method and apparatus for manufacturing a finished part or product from a workpiece. In some embodiments, an expanding jet of cryogen may be jetted to a surface of a workpiece and a tool from a nozzle, wherein the cryogen is at least partially separated into a condensed phase portion and a vapor portion within a downstream portion of the nozzle.

Iron-based alloys and articles in strips, sheets, workpieces and the like are converted into high strength steel with a minimum of cost, time and effort, including producing dual phase materials. This is achievable by extremely rapid micro-treating of low, medium, and high carbon iron-based alloys and articles by rapid heating and rapid cooling at least a portion of the alloy/article. This heating step involves nearly immediately heating the iron-based alloy to a selected temperature above its austenite conversion temperature. Then, the alloy is immediately quenched, also at an extremely fast rate, on at least a portion of the iron-based alloy in a quenching unit adjacent the heating unit. This procedure forms high strength alloy in a desired area, depending upon where the treatment was performed.

The invention relates to a water soluble polyether quenching medium for quenching a metal material, which comprises the following components in percentage by weight: 1 to 30 percent of water soluble polyether, 0.1 to 1.0 percent of antirusting agent, 100 to 500ppm of defoaming agent, 0.1 to 1.0 percent of composite germicide, 0.2 to 2 percent of pH regulator and the balance of water, wherein the water soluble polyether is a condensation compound of ethylene oxide and propylene epoxide and a number-average molecular weight is less than 20,000. The water soluble polyether quenching medium is characterized by solving the problems of insufficient hardness of oil quenched workpieces and cracking and deformation of water quenched workpieces, reducing fire hazards in quenching, improving production safety, avoiding oily fume discharge, reducing environment pollution, improving working environment, contributing to the body and mind health of workers, along with readily available raw materials,simple production process, low price, excellent antirusting, defoaming and antibacterial performance, wide quenching cooling speed range and cooling speed ranging from oil quenching cooling speed andwater quenching cooling speed.

Ferritic nitrocarburized surface treatment of cast iron brake rotors providing oxidation resistance, good braking performance and absence of distortion. Machined brake rotors are pre-heated, then immersed into a high temperature molten nitrocarburizing salt bath for a first predetermined dwell time. After removing the brake rotors from the nitrocarburizing salt bath, the brake rotors are directly immersed into an oxidizing salt bath at a lower temperature than the nitrocarburizing salt bath so that the brake rotors are thermally quenched. After a predetermined second dwell time in the oxidizing salt bath, the brake rotors are removed therefrom and further cooled to room temperature, either by water application thermal quenching or slow cooling in air. A fixture provides stable holding the brake rotors with a minimum of contact during placement in the salt baths.

The invention relates to a low-alloy high-toughness wear resistant steel plate and a manufacturing method thereof. The steel plate contains the following chemical components (wt%): C: 0.08-0.20%, Si: 0.10-0.60%, Mn: 1.00-2.00%, B: 0.0005-0.0040%, Cr<=1.50%, Mo<=0.80%, Ni<=1.50%, Nb<=0.080%, V<=0.080%, Ti<=0.060%, Al: 0.010-0.080%, Ca: 0.0010-0.0080%, N<=0.0080%, O<=0.0080%, H<=0.0004%, P<=0.0015% and S<=0.010%, wherein the following relationships are satisfied: 0.20%<=(Cr/5+Mn/6+50 B)<=0.55%, 0.02%<=(Mo/3+Ni/5+2Nb)<=0.45%, and 0.01%<=(Al+Ti)<=0.13%; and the balance of Fe and inevitable impurities. The contents of both carbon and alloy elements are reduced, the characteristics of refining, strengthening and the like of micro-alloy elements such as Nb and Ti are fully utilized, and a TMCP (thermal mechanical control processing) technology is adopted, so that the wear resistant steel plate is high in hardness, good in toughness, easy to weld, perfect in wear resistance, and applicable to easily-worn components in various types of mechanical equipment.

The invention relates to an isothermal graded quenching oil composition and uses thereof, mainly aims at further improvement of cooling performances, thermal oxidation stability and brightness of isothermal graded quenching oil in the prior art, and solves the problem that the isothermal graded quenching oil has no corrosion resistant performance on workpieces after quenching. The isothermal graded quenching oil composition comprises the following components: by weight, a) 0.3 to 8 parts of a cooling accelerant; b) 0.1 to 3 parts of an antioxidant; c) 0.001 to 1 part of a brightener; d) 0.03 to 5 parts of an anti rust agent; and e ) 78 to 98 parts of base oil; in the technical scheme, the antioxidant is selected from a phenolic antioxidant or a mixture of amine antioxidants, the technical scheme can well solve the problem, and the isothermal graded quenching oil composition can be used for quenching of wearable steel balls, saw blade, auto gearbox gears, gear rings, gear sleeves, shafts and other precision parts.

The present invention provides a low-alloy high-performance wear-resistant steel plate and a manufacturing method thereof. The steel plate comprises the following chemical compositions (wt%) of 0.21-0.32% of C, 0.10-0.50% of Si, 0.60-1.60% of Mn, 0.0005-0.0040% of B, 0-1.50% of Cr, 0-0.80% of Mo, 0-1.50% of Ni, 0-0.080% of Nb, 0-0.080% of V, 0-0.060% of Ti, 0.010-0.080% of Al, 0.0010-0.0080% of Ca, 0-0.0080% of N, 0-0.0080% of O, 0-0.0004% of H, 0-0.015% of P, and 0-0.010% of S, wherein the following relationships are satisfied: 0.20%<=(Cr/5+Mn/6+50B)<=0.55%, 0.02%<=(Mo/3+Ni/5+2Nb)<=0.45%, 0.01%<=(Al+Ti)<=0.13%, and the balance is Fe and inevitable impurities. The low-alloy high-performance wear-resistant steel plate manufactured by the above compositions and through a TMCP process has high strength and hardness, good toughness and excellent wear resistance, and is suitable for easy-to-wear parts in various mechanical equipments.

The present invention provides a method of hot pressing using hot rolled and cold rolled steel sheet or Al-based plated steel sheet or Zn-based plated steel sheet enabling a strength of at least 1200 MPa to be obtained after high temperature forming and with extremely little possibility of hydrogen embrittlement and such hot pressed parts, that is, a method of hot pressing a high strength automobile parts comprising using steel sheet containing as steel compositions by wt % C:0.05 to 0.5% or steel sheet plated mainly with Al or Zn to produce automobile members by hot pressing during which making the heating temperature before pressing Ac₃ or more to 1100° C. or less, making the hydrogen concentration in the heating atmosphere 6 vol % or less, and making the dew point 10° C. or less and such hot pressed parts.

The invention provides an HT550 steel plate with ultrahigh toughness and excellent weldability and a manufacturing method thereof. Based on a component system which is subjected to ultralow C-high Mn-Nb microalloying-ultramicro Ti treatment, Mn/C is controlled in the range from 15 to 30, (%Si)*(%Ceq) is less than or equal to 0.050, (%C)*(%Si) is less than or equal to 0.010, (%Mo)*[(%C)+0.13(%Si)] is in the range from 0.003 to 0.020, Ti/N is in the range from 2.0 to 4.0, (Cu+Ni+Mo) is alloyed, Ni/Cu is greater than or equal to 1.0, Ca treatment is performed, and the ratio of Ca/S is within the range from 0.80 to 3.00; TMCP (Thermo-Mechanical Control Process) is optimized, so that the microscopic structure of the steel plate comprises fine ferrites and self-tempered bainite; and the steel plate has an average grain size below 15 microns, yield strength greater than or equal to 460 MPa, tensile strength in the range from 550 MPa to 700 MPa, a yield ratio less than or equal to 0.85, and -60 DEG C Charpy ballistic work (single value) greater than or equal to 60 J; therefore, the steel plate is capable of bearing large thermal input welding while having even and excellent match of strong obdurability and strong plasticity; and as a result, the steel plate is especially suitable for a sea bridge structure, an ocean wind tower structure, an ocean platform structure and a hydroelectric structure.

The invention relates to ultra quick quenching oil and a preparation method thereof. The ultra quick quenching oil comprises the following raw materials in percentage by weight: 80 to 97 percent of refined mineral oil, 1 to 10 percent of cooling catalyst, 1 to 5 percent of antioxidant and 1 to 6 percent of anionic surfactant. The kinematic viscosity of the refined mineral oil at the temperature of 40 DEG C is 6 to 9 mm<2>/s; the cooling catalyst is a mixture of oily phenolic resin and polybutylene; the antioxidant is alkylated diphenylamine; and the anionic surfactant is petroleum sodium sulfonate. The preparation method of the ultra quick quenching oil is simple and convenient; the obtained quenching oil has the advantages of ultra high cooling speed, good thermal oxidation stability, long service life and continuous and stable property retention; little peculiar smell, smog and carbon deposit are produced, and the take-out consumption of a workpiece is low; and after the workpiece is quenched by adopting the quenching oil, the workpiece has the advantages of high and uniform surface hardness, deep quenching layer, low deformation, metallographic structure, good mechanical property and good brightness, the surface of the workpiece does not become black, and the workpiece is easily cleaned.

The invention relates to a conical-face spray nozzle without blockage or air resistance and a method for forming conical-face aerial fog. The conical-face spray nozzle comprises a fluid mixing ejector, wherein the ejector is provided with a first conical-face fluid slit, a second conical-face fluid slit and a conical-face mixing ejection slit; the first fluid slit and the second fluid slit are partitioned with a certain angle and converged into the mixing ejection slit at the tail end; first fluid and second fluid which are converged into the mixing ejection slit by the first fluid slit and the second fluid slit are fully mixed and atomized by the mechanical synergism of a floating ring machine rotating at high speed and ejected in a conical face along the mixing ejection slit; and accordingly, the conical-face spray nozzle of the invention prevents an ejecting shape and angle of an ejecting medium from the influence of air pressure and flow and can eject according to the design shapeand angle.

The invention provides a technology for processing high strength large hexagon-headed bolt used for steel structure. The invention relates to a technology for processing high strength connecting piece. High frequency induction current hot forging and cold extruding are adopted, so as to produce a bolt. The invention is on the basis of patent application with patent application number of 200810020090.5, high frequency induction heating is adopted in hot forging, frequency thereof is controlled to be 20000-50000Hz, and the advantages of high frequency induction heating that speed is fast and heating is uniform are utilized, so that work piece surface can obtain uniform tissue and properties from center part to the surface, heating uniformity of work piece is improved, better crystal phase structure can be obtained, and high strength bolt with better property can be obtained.

The invention discloses a processing technology for a high-strength large hexagon head bolt used for a steel structure and belongs to a processing technology for a high-strength connecting piece. The high-strength large hexagon head bolt is processed by less or non cutting including one time of hot forging forming and three times of cold extrusion forming, wherein the hot forging forming is bolt rail forming. The first time of cold extrusion forming is screw forming, the second time of cold extrusion forming is upper screw thread section forming, and the third time of cold extrusion forming is thread forming. The invention mainly adopts the cold extrusion process for bolt production, improves the strength of the bolt, optimizes the production process of the bolt, overcomes the delay fracture and fatigue fracture of the high-strength bolt, ensures that the bolt is not easy to fracture in the use process and reliably connected, prolongs the service life of the bolt and can more meet the use requirement for the high-strength large hexagon head bolt used for the steel net frame bolt ball node in modern society.

A laser-welded single-piece forged-steel piston with an enclosed inner oil cooling chamber having the advantages of simple structure and easy manufacturing process, and capable of satisfying the requirement of engines for high power, high rigidity, and low discharge development, and its manufacturing process. The laser-welded single-piece forged-steel piston of the invention comprises a piston body member and a piston ring member, wherein the piston body member is welded together with the piston ring member through laser welding procedure, an enclosed inner oil cooling chamber is formed between the piston body member and the piston ring member, and is connected with the piston inner cavity by means of at least two oil inlet/outlet holes, and a pin hole is opened at the lower portion of the piston body member.

Apparatus for heat-treating an elongate structural body part made from a blank compressed while being soft or from steel strip of hardenable 22 Mn B5 mod. steel sheet with a thickness of 1 mm to 3 mm, includes an apparatus for positioning the structural body part in substantially upright disposition. Placed in surrounding relationship to the structural body part is an induction element which can move from bottom to top, thereby being able to follow a contour of the structural body part and allowing to at least partially heat the structural body part to an austenitizing temperature suitable for hardening. Disposed adjacent to the induction element is a cooling unit which follows the induction element in movement direction. The induction element and the cooling unit are moveable relative to one another and connected to a tool carriage which is mounted to a column for movement in a vertical direction, in a transverse direction to the column and about a horizontal axis.

The invention relates to a high-strength aluminium alloy plate and a production method thereof. The high-strength aluminium alloy plate is made from the components in parts by weight: 0.4-0.8 part ofSi, 0.3-0.6 part of Fe, 0.2-0.3 part of Cu, not more than 0.15 part of Mn, 1.0-1.15 parts of Mg, 0.1-0.3 part of Cr, not more than 0.05 part of Zn, 0.02-0.03 part of Ti, not more than 0.01 part of other impurities and the balance of Al, wherein the total amount is 100 parts. The production method comprises following steps: smelting, refining, stewing, casting, face milling, hot rough rolling, hotprecision rolling, cold rolling and online continuous quenching, wherein furnace temperature is 590-610 DEG C, and the quenching speed is 0.7-2.0m/min; and then carrying out secondary cold rolling till a aluminium alloy platen is rolled to be 0.8-10mm; and finally obtaining a finished product through finishing and artificial ageing treatment. The plate has the advantages of high strength, corrosion resistance, good welding performance and the like; the adopted hot rolling method is a continuous quenching process, thereby realizing the rapidity and the continuity of uncoiling quenching and shortening the production cycle, therefore being beneficial to energy saving and consumption reducing and popularization and application.

A polymeric quenchant. The polymeric quenchant comprises an inorganic nanoparticle, a water-soluble polymer, and water, wherein a weight ratio of the inorganic nanoparticle, water-soluble polymer and water is about 0.05-5:1-5:100. The cooling rate of steel during a quenching process can be adjusted by regulating the components and ratios of the adjusted by regulating the components and ratios of the polymeric quenchant to achieve desirable steel properties.

The invention belongs to the technical field of heat treatment processes of alloy steel hollow car axle materials for high-speed passenger trains and particularly relates to a heat treatment method of a novel alloy steel hollow car axle material. The heat treatment method is characterized by pre-heating novel alloy steel with shaft blank sizes at the temperature of 910-950 DEG C, quenching the novel alloy steel at the temperature of 900-940 DEG and tempering the novel alloy steel at the temperature of 620-670 DEG C. The heat treatment method has the advantages that the developed novel alloy steel hollow car axle material for the high-speed passenger trains is domestically and independently developed, mechanical properties of axles which are treated by a heat treatment process matched with the material all exceed requirements of the European hollow car axle standard EN13261, the axles are good in obdurability matching, especially, high in smooth specimen fatigue strength and notch specimen fatigue strength and excellent in low temperature impact toughness, so that the axles can be used under various domestic weather conditions. According to the heat treatment method of the novel alloy steel hollow car axle material, heat treatment process technical assurance is provided for finally producing novel alloy steel hollow car axles at the speed of 200km/h-350km/h.