31results about How to "Moderate cooling rate" patented technology

The invention discloses a slitting cutting disc and a preparation method thereof, which belong to the process field of cutters. The slitting cutting disc is of a circle blade, and comprises a center hole, a cutter disc and a blade, wherein the center hole is arranged in the center of the cutter disc, the blade is arranged on an outer ring of the cutter disc, a blade opening is arranged on an outer ring of the blade, and the opening angle delta ( ) of blade opening is 23-27 degrees. The opening thickness h of the blade opening is 0.24-0.26mm. The materials which are made into the slitting cutting disc comprise components with percentage by weight: carbon (C) 1.15-1.33%, nitrogen (N) 0.2-0.4%, manganese (Mn) 0.30-0.40%, silicon (Si) 0.52-1.20%, chromium (Cr) 8.50-10.50%, tungsten (W) 1.50-2.50%, vanadium (V) 0.35-0.50%, molybdenum (Mo) 0.25-0.4%, nickel (Ni) 0.30-0.40%, copper (Cu) <=0.30%, sulphur (S)<=0.020% and phosphorus (P)<=0.027%, and the allowance is ferrum (Fe). The slitting cutting disc has the advantages that the slitting cutting disc is excellent in abrasive resistance and is not easy to deform, and the blade opening resists abrasion, not easy to crack, long in service life and easy to make.

The invention belongs to the field of heat treatment of metals, and particularly relates to a water-soluble polyether hardening agent. According to weight ratio, the formula of the water-soluble polyether hardening agent is as follows: water-soluble polyether : glycol : sebacic acid : monoethanolamine : sodium nitrate : sodium chloride is equal to 45:15:8:8:8:16. When in use, the water-soluble polyether hardening agent needs to be diluted with water to form solution which contains 3 to 12 percent of water-soluble polyether, 1 to 4 percent of glycol, 0.53 to 2.13 percent of sebacic acid, 0.53 to 2.13 percent of sodium nitrate and 1.06 to 4.26 percent of sodium chloride, and simultaneously antirust agent accounting for 0 to 1 percent of the weight of the solution and preservative agent accounting for 0 to 1 percent of the weight of the solution are added. The water-soluble polyether hardening agent has a unique cooling effect, the cooling speed can be regulated, and the hardenability is good and uniform. Meanwhile, the water-soluble polyether hardening agent has the advantages of abundant material sources, low production cost, economy, practicability, no pollution, no toxicity, aging resistance, nonflammability, appropriate cooling speed in the martensitic range and the like.

A casting method of a hydraulic casting comprises the steps that (1) sand mold manufacturing is conducted, specifically, a casting system of the hydraulic casting is cast through molding sand, the casting system comprises a casting cavity and a pouring system, and a sand core is arranged in the casting cavity to form a hydraulic cavity of the casting and a valve body mounting hole; (2) a burdening process is carried out; (3) a smelting process is carried out; (4) a spheroidizing process is carried out; (5) an inoculation process is carried out; and (6) a pouring process is carried out, specifically, when the temperature is reduced to 1280-1330 DEG C, molten iron is poured into the casting system to form the casting; metal-stream inoculation is conducted through inoculation powder while pouring is conducted, the adding amount is 0.08%-0.10% of the total amount of the original molten iron, the inoculation powder is a silicon-barium inoculant, and the silicon-barium inoculant comprises, by mass, 69%-74% of Si, 0.5%-2.0% of Ca, 1.5%-2.5% of Ba, 2%-2.5% of Al, smaller than or equal to 0.02% of S and the balance iron; and after the casting is cooled, the hydraulic casting is obtained. The scheme provided by the invention has the advantages that the defects of ring gas and slag inclusions of the hydraulic casting can be effectively improved, and the phenomena such as sand falling of a surface structure cannot occur in the pouring process.

The invention relates to a composite heat treatment process, which belongs to the technical field of metal heat treatment. The composite heat treatment process includes the following steps: (1) primary heating, (2) air cooling, (3) air cooling, (4) primary tempering, (5) secondary heating, (6) water cooling, (7) secondary tempering, (8) quenching, (9) take out the workpiece for cleaning, drying, compounding The heat treatment is completed; the composite heat treatment process of the present invention adds a heating step before each tempering, which can well release the residual stress in the workpiece and prolong the service life, and the composite heat treatment process of the present invention uses mist Advanced quenching liquid cooling and water tank water cooling, through two rapid cooling methods, the quenching effect of the workpiece is improved.

The invention discloses quenching oil dedicated to small module gears and a preparation method of quenching oil, and belongs to the technical field of metal heat treatment. The quenching oil comprises the following components in parts by mass: 35 to 40 parts of refined base oil, 2 to 3 parts of a cooling compound agent, 0.5 to 0.8 part of a blackening compound agent, 0.3 to 0.7 part of a brightening agent, 0.6 to 0.8 part of a surfactant and 0.04 to 0.06 part of an antioxidant. The quenching oil is specially developed for the small module gears of which the module is 1 mm or below, the optimal utilization temperature is 100 to 110 DEG C, the fluidity of the quenching oil is good in the temperature range, the cooling velocity for the small module gears is moderate, protective films are formed on the surfaces of the gears through automatic blackening during quenching, the secondary coating antirust treatment on the surfaces after heat treatment is reduced, the resources are saved, the procedure is reduced, and the efficiency is improved.

The invention discloses low-consumption environment-friendly spring steel water-soluble quenching liquid and a quenching process and belongs to the technical field of common spring steel heat treatment quenching liquid and processes. The quenching liquid is characterized in that the quenching liquid is composed of, by mass, an antioxidant, an anti-rust agent, a preservative, a defoaming agent and the balance methoxy polyethylene glycol. According to the low-consumption environment-friendly spring steel water-soluble quenching liquid and the quenching process, all the components are organically combined together, and the quenching performance of the quenching liquid can be played to the limit with the synergistic effect, namely, the defects of the quenching liquid are overcome through other functional components while the requirements for the good solubilizing performance and solubility inversing performance of basic solvent are met. When rapid oil or diesel oil quenching is replaced by the low-consumption environment-friendly spring steel water-soluble quenching liquid, the production cost is reduced and the production environment and natural resources are protected while resources are saved.

The invention discloses quenching oil capable of making a fastener become black by itself after quenching and an application method of the quenching oil, and belongs to the technical field of metal heat treatment. The quenching oil comprises, by mass, 35-40 parts of refined base oil, 7-10 parts of composite cooling accelerant, 0.5-0.7 part of a composite blacking agent, 0.4-0.8 part of a brightening agent, 0.5-0.8 part of a surface active agent and 0.02-0.04 part of antioxidant. The composite cooling accelerant is the mixture of polyisobutene, dimethyl naphthalene and mahogany petroleum sulfonate. The composite blacking agent is the mixture of short oil alkyd resin, a coloring agent and a wetting agent. The brightening agent is the mixture of imidazoline oleate and methyl terpene resin. The coloring agent is disperse black 9. The wetting agent is fatty alcohol-polyoxyethylene ether. The surface active agent is span-80. The optimal using temperature of the quenching oil ranges from 70 DEG C to 75 DEG C, the speed for cooling the fastener is moderate, a protection film is formed on the surface in a self-blacking manner during quenching, and efficiency is improved.

The invention provides a water-soluble quenching agent. The water-soluble quenching agent is prepared from the following raw materials of, by weight, 5-8 parts of a surfactant, 42-45 parts of polyether, 0.1-0.3 part of a defoamer, 0.2-0.5 part of a sterilizing agent, 35.7-47.5 parts of water, and 5-10 parts of sodium benzoate. Compared with the prior art, the water-soluble quenching agent has thefollowing beneficial effects that the quenching degree of materials can be met and controlled so as to avoid cracks of the materials; environment-friendly water-based quenching liquid with the high-quality polyether as a base is composited with the balanced surfactant, defoamer and sterilizing agent, thus the extremely large cooling rate is achieved at the high-temperature cooling stage, grains can be refined, and the final performance of a quenched workpiece is improved; and at the low-temperature cooling stage, the moderate cooling rate is achieved, so that the problems of cracking, deforming and the like in the workpiece cooling process are effectively solved, and the machining accuracy and surface quality of the workpiece are improved.

The invention discloses quenching oil capable of enabling an screw to blacken automatically after quenched and a quenching method thereof. The invention belongs to the field of metal heat treatment technology. The quenching oil comprises the following components, by weight, 35-40 parts of refined base oil, 6-10 parts of cooling catalyzed composite agent, 0.4-0.6 parts of blackening composite agent, 0.3-0.7 parts of brightening agent, 0.4-0.7 parts of surface activating agent and 0.02-0.04 parts of antioxidant. The cooling catalyzed composite agent is a mixture of dialkyl naphthalene and petroleum sulfonate; the blackening composite agent the mixture of short oil alkyd resin, colouring agent and wetting agent; the brightening agent is the mixture of imidazoline oleate and methyl terpene resin; the surface activating agent is span-80. The colouring agent is disperse black 9; the wetting agent is fatty alcohol-polyoxyethylene ether. The best using temperature of the quenching oil is between 75 DEG C and 80 DEG C. Between 75 DEG C and 80 DEG C, the cooling speed of the quenching oil for the screw is moderate, the surface can be blackened automatically and a protective film can be formed while the quenching, so that the processes can be reduced and the efficiency can be improved.

The invention provides a novel piston top of a gas engine. The piston top comprises a cylindrical piston top body, wherein annular grooves are distributed in the side wall of the piston top body; the upper end surface of the piston top body is concave inwards to form a first cavity body, and the lower end surface of the piston top body is concave inwards to form a second cavity body; the outer edge of the second cavity body is continuously concave inwards to form a cooling cavity which consists of an inner ring bearing surface, a connecting surface, an upper bottom surface and an outer ring bearing surface which are successively connected, the inner ring bearing surface and the outer ring bearing surface are parallel to the axis of the piston top body, the connecting surface is arc-shaped, and the center of a circle of the connecting surface is positioned on one side of the inner ring bearing surface. Due to the adoption of the piston top of the gas engine disclosed by the invention, the volume of the cooling cavity is reduced, so that the cooling speed of a piston is moderate, too high or too low cooling speed is avoided, and the heat loss is small, so that the oil consumption rate is reduced; at the same time, after the volume of the cooling cavity is reduced, the oil mass of cooling oil is reduced, the consumed power of a lubricating oil pump is reduced, and the cost is reduced; the structure of the piston top is simple, the processing is facilitated, and the processing cost is reduced.