35results about How to "Change binding" patented technology

The invention discloses a method for manufacturing an eccentric wheel through powder metallurgy. The method comprises the following step: the eccentric wheel is manufactured by the following raw materials in percentage by weight: 0.2-0.4 percent of nickel, 0.4-0.6 percent of molybdenum, 0.6-0.8 percent of tin, 0.3-0.5 percent of aluminium oxide powder, 0.8-1 percent of graphite powder, 0.4-0.6 percent of petroleum wax, 4-6 percent of copper, 1-2 percent of performance additive and the balance of iron. According to the invention, through the added performance additive, superfine powder is provided in the mixed material, and the superfine powder can be filled in the gaps of large particles, so that apparent density of the mixture is improved; the superfine powder is mainly formed by nano-zinc oxide powder and calcium stearate, and through additives including a silane coupling agent and the like, a novel performance additive is obtained, and various physical properties about wear resistance and the like of the product are further improved, and as polyethylene vinyl acetate and liquid petrolatum are taken as lubricants to be added into the performance additive, the effect of the performance additive during mixing and pressing is enhanced, the blank pressing strength of a powder metallurgy structural piece under equal pressing pressure is greatly improved, combination form and pore shape of raw material particles are changed, and the problem about crack generation is solved from the root cause.

The invention discloses a method for manufacturing a motorcycle crank shaft through powder metallurgy. The method comprises the following step: the motorcycle crank shaft is manufactured by the following raw materials in percentage by weight: 0.4-0.6 percent of nickel, 0.4-0.6 percent of manganese sulfide powder, 0.4-0.6 percent of aluminium, 0.4-0.6 percent of manganese, 0.3-0.4 percent of zinc stearate, 1-2 percent of performance additive, 21-25 percent of copper and the balance of iron. According to the invention, through the added performance additive, superfine powder is provided in the mixed material, and the superfine powder can be filled in the gaps of large particles, so that apparent density of the mixture is improved; the superfine powder is mainly formed by nano-silicon dioxide and calcium stearate, and through additives including a silane coupling agent and the like, a novel performance additive is obtained, and various physical properties about wear resistance and the like of the product are further improved, and as polyethylene vinyl acetate and liquid petrolatum are taken as lubricants to be added into the performance additive, the effect of the performance additive during mixing and pressing is enhanced, the blank pressing strength of a powder metallurgy structural piece under equal pressing pressure is greatly improved, combination form and pore shape of raw material particles are changed, and the problem about crack generation is solved from the root cause.

The invention provides a modification method of fenugreek polysaccharide gum. Graded screening is utilized to remove impurities with high water-insoluble substance content in the fenugreek polysaccharide gum sheet; and a physical process is utilized to perform modification (wetting fenugreek polysaccharide gum with a 15% ethanol water solution) and wall-breaking tackifying treatment, thereby greatly enhancing the apparent viscosity of the fenugreek polysaccharide gun and greatly lowering the water-insoluble content in the fenugreek polysaccharide gum.

The invention belongs to the technical field of ceramic and particularly relates to ceramic glaze with a water activating function, a preparation method thereof, ceramic prepared by the ceramic glaze and a preparation method of the ceramic. The ceramic glaze is prepared by, by mass percentage, 60-80% of ceramic glaze base material, 5-20% of ceramic additives with the water activating function, 5-8% of nano-zirconia, 0.5-5% of phosphate, 1-5% of nano cesium oxide, 2-8% of yttrium oxide, 1-5% of nano titanium dioxide and 3-8% of tourmaline. The preparation method of the ceramic glaze includes: ball milling the ceramic glaze base material until all the ceramic glaze base material can pass a 250-mesh sieve, adding the rest of components, adding water and ceramic diluent to prepare slurry, ball milling, and discharging. The ceramic glaze has the advantages that the ceramic glaze can acts on water molecular cluster structures to allow the hydrogen bonds to be destroyed and chemical bonds to break, large molecular clusters become small molecular clusters only containing 5-6 water molecules, toxic gas dissolved in water is released at the same time, the water become slightly alkaline, and the activity of the water is increased.

The invention discloses a production method of sprocket powder metallurgy material. A sprocket is made from, by weight percent, 0.2-0.3% of graphite, 0.2-0.4% of nickel, 0.8-1% of molybdenum, 0.6-0.8% of nano emery powder, 0.3-0.5% of manganese sulfide, 0.8-1% of magnesia powder, 4-7% of copper, 1-2% of modifying aid, and the balance of iron. The production method has the advantages that the modifying aid is added, ultrafine powder is added in raw mixture and can fill gaps of large particles, and accordingly apparent density of the mixture can be increased; the ultrafine powder mainly comprises nano silica and calcium stearate, the novel modifying aid is obtained from aids such as silane coupling agent, and accordingly various physical properties of the finished product, such as wear resistance, are improved further; polyethylene vinyl acetate and liquid paraffin are used as lubricants added to the modifying aid, and accordingly the effect of the modifying aid in mixing and pressing is improved; compact intensity of powder metallurgical parts can be improved greatly while compacting pressure is equal, particle combination form and pore shape of the raw materials are changed, and cracking is eliminated from an origin.

The invention discloses a method for preparing powder metallurgy of an engine piston pin. The method includes: the engine piston pin is made of following raw materials, by weight, 0.4-0.6% of nickel, 0.4-0.6% of magnesium, 0.6-0.8% of graphite powder, 0.4-0.6% of cadmium, 0.3-0.4% of zinc stearate, 1-2% of performance additive, 4-6% of copper, and the balance iron; via adding the performance additive, superfine powder is provided in the mixed raw materials and can fill in seams among large granules, so that density of the mixed materials is improved; main ingredients of the superfine powder include nano-silica and calcium stearate, the novel performance additive is obtained via agent like silane coupling agent, and physical properties like abrasion performance of prepared products is further improved; and polyethylene vinyl acetate and liquid paraffin serving as lubricating agent are added in the performance additive, so that effect of the performance additive under mixed compression is strengthened, the strength of compaction of power metallurgy structural members is greatly improved under same compression force, combining shape and hole shape of the raw material granules is changed, and problem about generation of crack is solved basically.

The invention discloses a preparation method for powder metallurgy for an automotive brake valve block. The preparation method includes that the automotive brake valve slice is made from raw materials, by weight percentage, 0.2-0.4% of nickel, 0.2-0.4% of cerium, 0.2-0.4% of chromium, 0.4-0.6% of emery powder, 0.6-0.8% of zinc, 0.8-1% of manganese, 0.8-1% of graphite powder, 1-2% of copper, 1-2% of performance additives and the balance ferrum. By adding the performance additives, superfine powder in mixed materials can be filled in gaps between large particles, so that apparent density of the mixed materials is improved; since main ingredients of the superfine powder are nano ferrum powder and calcium stearate and novel performance additives obtained from additives of silane coupling agent and the like further improves various physical properties of wear resistance and the like of products; and polyethylene vinyl acetate and liquid paraffin are added into the performance additives as lubricant, so that efficiency of the performance additives in mixed suppression is enhanced, pressing intensity of powder metallurgical parts under the same pressing pressure is greatly improved, particle combination forms and pore configurations of the raw materials are changed, and the problem caused by cracks is totally solved.