50results about How to "Phosphating time is short" patented technology

The invention provides a process for cold extrusion forming of a one-way device spline sleeve. The process comprises the steps of utilizing hollow pipes to serve as raw materials, performing blanking according to specified dimensions, sequentially performing annealing, head flattening, shot blasting, phosphatization and saponification treatment, cold extrusion shaping, cold extrusion spline forming, machining, quenching, tempering, shot blasting, cleaning and grinding machine processing, and obtaining finished product one-way device spline sleeves. The one-way device spline sleeves obtained through the process are high in precision, small in individual differences, good in strength performance and long in service lives.

The invention discloses an anhydrous phosphating agent. The anhydrous phosphating agent is prepared from, by weight, 20 parts to 40 parts of phosphoric acid, 3 parts to 15 parts of polyvinyl butyral, 3 parts to 12 parts of silicone oil, 5 parts to 10 parts of sodium borate, 8 parts to 18 parts of resin, 3 parts to 14 parts of citric acid and 30 parts to 60 parts of organic solvents. A preparation method of the anhydrous phosphating agent includes the following steps that a, mixed liquid of polyvinyl butyral resin and the organic solvents is prepared; b, phosphoric acid and citric acid organic solvent mixed liquid is prepared; and c, mixing is performed, wherein the solutions obtained in the steps of a and b, silicone oil and sodium borate are mixed according to the formula, and the phosphating agent is prepared in a stirring manner. The phosphating agent is good in phosphating effect, small in sewage discharge amount, free of corrosivity, simple in preparation process and low in cost.

The present invention discloses a kind of low temperature fast phosphatizing solution for treating the welded area in drawn high carbon coil rod and its phosphatizing process. The low temperature fast phosphatizing solution of the present invention has lubrication on the welded area to avoid crack and breaking. The low temperature fast phosphatizing solution has hydroxylamine sulfate to replace traditional harmful NaNO2, and possesses environment friendship, high stability and long service period.

The invention provides a production process of a plastic coated pipe fitting without secondary tapping in order to overcome the defects of high rejection rate, high cost and the like, which are caused by secondary tapping on tooth patterns of a product after coating plastic in the prior art process. The production process comprises the following steps of: removing oil and rust from a malleable cast iron pipe fitting, neutralizing through swimming immersion, water washing through swimming immersion, surface conditioning through swimming immersion, high-temperature phosphating, water washing through swimming immersion, water washing through spraying, preheating, installing a tooth socket, coating plastic internally and externally, dismounting the tooth socket, curing and leveling, cooling, checking, preventing rust of the tooth patterns, and obtaining the finished product. Compared with the prior art, the production process has the beneficial effects that: due to the adoption of high-temperature Zn-Ca phosphating, the phosphating time is shortened, the quality of a phosphating film is ensured, the product has stable properties, such as adhesion force, impact property and the like, the production procedure is simple, the production efficiency is high, labor investment and high rejection rate caused by factors, such as secondary tapping and the like, are reduced, and the quality of the product is improved because a tooth pattern rust-preventing process is added.

The invention aims to provide a phosphating solution and a preparation method thereof. The phosphating solution is mainly prepared from hydroxylamine sulphate, phosphoric acid, sodium dihydrogen phosphate, fatty alcohol-polyoxyethylene ether, cerous nitrate, zinc oxide, manganese phosphate and water. The preparation technology is simple, feasible and easy to operate. The phosphating solution provided by the invention has certain capability of removing rusts and oil dirt; by a sand blasting treatment technology, an overall phosphating working procedure is saved; a phosphated film generated after phosphating treatment is high in cracking resistance, deformation resistance and impact resistance, can be well combined with an organic coating film and is a high-quality bottom layer for film coating; a phosphating process can be executed at normal temperature; the phosphating time is short; and the phosphating effect is good.

The invention provides a low-temperature phosphating solution containing chromic acid. The phosphating solution is prepared by the following components by weight: 170 to 180 parts of phosphoric acid, 48 to 52 parts of zinc oxide, 2 to 3 parts of ammonium molybdate, 4 to 6 parts of citric acid, 1 to 2 parts of sodium sulfate, 2 to 2.5 parts of bismuth molybdate, 0.8 to 1.2 parts of chromic acid and 1700 to 1800 parts of water. The phosphating solution has the advantages of low working temperature, low energy consumption, little sediment, short phosphating time, high working efficiency, reduction in pollution, environment protection, uniform and dense phosphating film, and good luster appearance. After the phosphating solution is used for spraying or soaking steel iron, a dense phosphated crystallized film with excellent performance can be formed on the surface of the steel iron.

The invention provides a slag-free low-temperature rapid electrolytic phosphating solution and a phosphating process thereof. The phosphating solution contains zinc ions, phosphate radicals, accelerators, organic acids and dissolved metal elements, and its mass components are as follows: zinc ions 10-80g / L, phosphate radicals 10-120g / L, accelerators 41-160g / L , organic acid 0‑5g / L, dissolved metal elements 0.1‑10g / L, where phosphate is calculated as P2O5. This process uses an inert titanium plate or mesh as the positive electrode, and the treated steel wire as the negative electrode. A certain current is applied to form a uniform zinc phosphate film on the surface of the steel wire. The film weight reaches more than 4g / m2, which meets the drawing requirements. The phosphating temperature of the invention is 10-60 DEG C, the phosphating time is 5-120 seconds, and no phosphating slag is generated, so it has the obvious advantages of high efficiency, energy saving and environmental protection.

The invention relates to a preparation method for a phosphating ferrous lithium high-temperature-resistant phosphating film material for metal and belongs to the technical field of metal surface treatment. The preparation method includes the following steps that firstly, a metal matrix is selected, the surface of the metal is cleaned, chemical components are given according to the method, and the mass ratio of the chemical components is (159.68):(65.88):(115.03):(254.11):(12); the components are placed in a crucible, fully and evenly stirred through a glass bar and then placed in a box-type resistance furnace, the temperature is slowly increased from the room temperature of 20 DEG C, heat preservation is conducted for 30 min when the temperature of the resistance furnace is increased to 500-800 DEG C, and solid lithium iron phosphate is obtained; a phosphating solution is prepared from the obtained powder lithium iron phosphate and phosphoric acid according to the mass ratio of 1:2, a blank to be treated is placed in the phosphating solution, and a dark grey phosphating film can be obtained by the blank; a heating dehydrogenation process is finally conducted on the blank, so that the hazard of hydrogen embrittlement is reduced; and a saponification process is conducted, so that lubrication between the squeezed blank and a die is further enhanced.

The invention provides a normal-temperature sludgeless fast phosphating liquid and a preparation method thereof. The normal-temperature sludgeless fast phosphating liquid is prepared from the following raw materials by mass percent: 10-20% of phosphoric acid, 6-10% of zinc oxide, 20-25% of zinc nitrate, 1-5% of sodium metanitrobenzene sulfonate, 0.5-2% of sodium citrate, 1-4% of ethylenediamine tetraacetic acid (EDTA), and the balance of water. The phosphating film copper sulfate droplet test time of the phosphating liquid disclosed by the invention can be up to 30 seconds, the neutral salt spray test time can be up to 4 hours, the adhesive force of a paint film can be up to 0 grade, meanwhile, the phosphating time is short, the work efficiency is greatly improved, the operating temperature is low, a phosphating sediment is basically not generated, the cleaning cycle is greatly prolonged, the solid waste treatment cost is reduced, and energy consumption does not need to be consumed.

The invention relates to a chromium-free chemical conversion treatment method for a magnesium alloy surface. The chromium-free chemical conversion treatment method for the magnesium alloy surface comprises the steps of surface pretreatment, alkaline washing for oil removing, water washing, acid pickling, water washing, phosphorization and water washing. Treating fluid used for phosphorization is composed of 20-80 g.L<-1> of sodium dihydrogen phosphate, 1-167 g.L<-1> of calcium hypophosphite and 0.1-10 g.L<-1> of hexamethylenetetramine. The phosphorization treatment temperature is 10-60 DEG C, the pH value is 2.8-7.0, and the phosphorization time is 1-50 minutes. A phosphating film surface prepared through the method is uniform, compact and high in corrosion resistance and can be used independently or serve as the bottom layer of a coating film, and the adhesive force of the coating film to a base body is improved. The reaction temperature is low, the condition is mild, the elements of a phosphating solution are simple, and the technique universality is high; no special requirements exist for equipment and the technique, and industrialized application is facilitated; production cost is reduced; meanwhile, energy resources are saved.

The present invention discloses a kind of low temperature fast phosphatizing solution for treating the welded area in drawn high carbon coil rod and its phosphatizing process. The low temperature fast phosphatizing solution of the present invention has lubrication on the welded area to avoid crack and breaking. The low temperature fast phosphatizing solution has hydroxylamine sulfate to replace traditional harmful NaNO2, and possesses environment friendship, high stability and long service period.

The invention discloses a liquid surface conditioning agent capable of improving the film-forming property of a phosphating film and a preparation method of the liquid surface conditioning agent capable of improving the film-forming property of the phosphating film. The liquid surface conditioning agent comprises the components, by weight, of 3%-9% of zinc nitrate, 1%-5% of calcium nitrate, 8%-15%of disodium hydrogen phosphate, 2%-4% of polyvinyl alcohol, 3%-7% of sodium alcohol ether sulphate, 2%-5% of trisodium pyrophosphate and 55%-81% of deionized water. The liquid surface conditioning agent is especially suitable for surface pretreatment of steel, aluminum and zinc before phosphating of zinc-calcium series and high in universality; crystallization active points in phosphating can beincreased, the grain size and binding force of the phosphating film are improved significantly, uniform growth of the phosphating film is facilitated, meanwhile, the phosphating temperature can be decreased, the phosphating time is shortened, the appearance quality of the phosphating film is improved, and corrosion resistance and abrasion resistance after phosphating are improved; and the preparation condition is gentle, and repeatability is high.

The invention discloses a method for preparing a high-temperature-resistant lithium iron phosphide high-temperature-resistant phosphating film material for metals, belonging to the technical field of metal surface treatment, and the invention is obtained through the following steps. Firstly, the metal substrate is selected, and the metal surface is cleaned, and the chemical composition is given according to the invention, and the mass ratio is: (159.68): (65.88): (254.11): (12). Put the above-mentioned substances into a crucible, fully stir them with a glass rod, put them into a box-type resistance furnace, slowly raise the temperature from a room temperature of 20°C, and keep the temperature for 30min when the resistance furnace rises to 500‑800°C to obtain a solid lithium iron phosphate . Put the obtained lithium iron phosphate powder and phosphoric acid in a phosphating solution with a mass ratio of 1:2, put the blank to be treated into the phosphating solution, and the blank can obtain a dark gray phosphating film. Finally, the blank is heated to remove hydrogen to reduce the harm of hydrogen embrittlement. The saponification process is carried out to further enhance the lubrication between the extrusion billet and the die.

The invention provides a normal-temperature rapid phosphating solution and a preparing method thereof. The normal-temperature rapid phosphating solution comprises the following raw materials in percentage by mass: 10-20 percent of phosphoric acid, 6-10 percent of zinc oxide, 20-25 percent of zinc nitrate, 1-5 percent of sodium 3-nitrobenzene sulfonate, 0.5-2 percent of sodium citrate and water in balancing amount. A coating which is phosphated by the normal-temperature rapid phosphating solution can last 45 seconds in a copper sulfate drip test and can last 4 hours in a neutral salt mist test, and the adhesive force of a paint coating reaches 0 grade. Meanwhile, the normal-temperature rapid phosphating solution has the characteristics of short phosphating time and low use temperature. The production efficiency is increased, and a large quantity of energy is saved.

The invention discloses a method for environment-friendly, low-temperature and rapid preparing of a phosphating film. The method comprises the steps that firstly, raw material components including, by mass, 5-8 parts of dihydric phosphate, 6-9 parts of nitrate, 0.5-3 parts of phosphoric acid, 0.05-0.5 part of oxidized graphene, 0.1-1 part of stabilizer, 6-10 parts of pH buffering agents and 100-120 parts of water are thrown into a reaction kettle, the temperature is increased to 20-40 DEG C, and after stirring is conducted for 20-60 min, the mixture is discharged out of the kettle; and secondly, a prepared phosphating solution is placed in a phosphating pond, the phosphating temperature is increased to 15-40 DEG C, then a steel test piece is placed in the phosphating pond, treatment is conducted for 2-20 min, airing is conducted, and the phosphating film is obtained. The obtained phosphating film is grey and bright in appearance, has good corrosion resistance and is good in attaching force with paint. The phosphating method is high in phosphating speed and low in phosphating temperature. A film layer is fine in crystal, the phosphating liquid is stable, little sediment exists, no toxicity or harm is generated to people and the environment, and cost is low.

The invention relates to the field of a phosphate solution formulation. The solution is especially suitable for the phosphating process before hot stamping of an ultra-high-strength steel blank, and the surface treatment of the ultra-high-strength steel blank needs to be carried out by a composite phosphate solution. , to obtain a layer of high-temperature-resistant composite lithium iron phosphate-calcium sulfate film to improve the life of the mold. Given the chemical composition ratio according to the invention, configure a composite lithium ferrous phosphate-calcium sulfate surface treatment solution suitable for hot stamping of ultra-high-strength steel sheets: first pass iron oxide Fe2O3, lithium hydroxide LiOH H2O, hydroxide Lithium LiOH H2O, ammonium dihydrogen phosphate (NH4) 2HPO4, carbon source C to synthesize lithium iron phosphate, followed by calcium sulfate CaSO4 ultrafine powder, lithium iron phosphate ultrafine powder LiFePO4, phosphoric acid H3PO4, and distilled water H2O, according to its The mass ratio is: (40‑60): (10‑30): (5‑10): (808‑912). Put the ultra-high-strength steel blank to be treated into the phosphating solution at 55°-60°C, and the blank can obtain a dark gray phosphating film. Finally, the blank is heated to remove hydrogen to reduce the harm of hydrogen embrittlement. The saponification process is carried out to further enhance the lubrication between the hot stamping sheet and the mold.

The invention discloses a cold extrusion forming technology of a brake shoe roller shaft, and belongs to the technical field of part machining. The technology comprises steps as follows: round steel is taken as a raw material, after being subjected to blanking according to specified dimension, the raw material is sequentially subjected to annealing, end facing, shot blasting, phosphorus saponification processing, cold extrusion forming, machining, quenching, tempering, shot blasting, cleaning, grinding machine processing and waste recovery, and a finished brake shoe roller shaft product is obtained. The brake shoe roller shaft obtained with the technology has high accuracy, small inter-individual difference, good strength properties and long service life.

The invention discloses a composition for steel phosphating and a preparation method thereof. The composition is composed of the following components in parts by mass: 2-6 parts of sodium nitrate, 2-4 parts of sodium citrate, 15-25 parts of iron manganese dihydrogen phosphate, 5-10 parts of magnesium oxide, 10-20 parts of nickel nitrate, 2-5 parts of copper sulfate, 1-3 parts of sulfosalicylic acid, 2-5 parts of polyethyleneglycol and 500-900 parts of deionized water. The preparation method comprises the following steps: a. weighing the components according to parts by mass; b. adding the sodium citrate, sulfosalicylic acid and polyethyleneglycol into another deionized water; and c. uniformly mixing the solutions obtained in the step a and step b. The composition for steel phosphating can complete phosphating within 8-10 minutes, and has the advantages of high phosphating speed and short required lime for phosphating; and the surface of the phosphated steel has bright color.

The invention relates to a steel phosphorization process. The steel phosphorization process comprises the following process steps including (1) grease removal, (2) water washing, (3) acid pickling, (4) secondary water washing, (5) neutralizing and (6) surface conditioning, wherein steel treated in the step (5) is placed into surface conditioning liquid at the temperature ranging from 40 DEG C to 45 DEG C to be treated for 1 min to 2 min, and the surface conditioning liquid is composed of 0.08-0.3 kg of a surface conditioning agent and the balance water in every 100 L of surface conditioning liquid; raw materials for preparing the surface conditioning agent comprise, by weight, 200-250 parts of water, 60-80 parts of disodium hydrogen phosphate, 40-60 parts of sodium tripolyphosphate, 2-5 parts of sodium hydroxide, 5-8 parts of potassium fluotitanate, 10-25 parts of amino trimethylene phosphonic acid and 2-5 parts of sodium pyrophosphate; and by means of the phosphorization process, all growth processes of a conversion coating can be conveniently completed at the low phosphorization temperature within short time, coating crystals are compact and even, and the attachment force is high.