84results about How to "Precise control of process parameters" patented technology

The invention particularly relates to a stainless steel surface nano-pore array film and a preparation method thereof. The technical scheme is that: stainless steel treated by surface pretreatment is used as an anode and is placed in a phosphate buffer solution to perform electrochemical anodic oxidation treatment; the time for the electrochemical anodic oxidation treatment is 0.1-4 h; a nano-pore array film is obtained on the treated stainless steel surface; the voltage for the electrochemical anodic oxidation is 10-80 V, and the temperature for the electrochemical anodic oxidation is -5 to 40 DEG C. The preparation method of the invention is simple, effective, environment-friendly, and low in cost; the stainless steel surface nano-pore array prepared by the method has a structured and ordered structure, a high density, a controllable pore diameter and pore depth, and no other impurity elements intervened, is firmly combined with the substrate, and has strong corrosion resistance andhigh hardness.

The invention discloses a semi-solid state machining and integrating system. The semi-solid state machining and integrating system is characterized by comprising a melting furnace component (1), a slurry preparation component (2), a mold material injection component (3) and an extrusion forming machine component (4); the slurry preparation component (2) is connected with the melting furnace component (1) through an upper diversion pipe (16), and is connected with the mold material injection component (3) through a lower diversion pipe (33); the mold material injection component (3) is connected with the extrusion forming machine component (4) through a mold material injection channel (31). According to the semi-solid state machining and integrating system, the structure is compact, equipment layout is reasonable, the operation is simple and convenient, a machining process is safe, process parameters are controlled precisely, the automation degree is high, semi-solid state product parts can be machined and produced continuously, effectively and excellently, and meanwhile, the machining and integrating system can also be used for the machining and forming of a common metal.

The invention particularly relates to antibacterial stainless steel and a preparing method thereof. According to the technical scheme of the antibacterial stainless steel and the preparing method thereof, stainless steel obtained after surface pretreatment is put into a dopamine buffer solution to be deposited for 0.1 h to 72 h under the condition with the temperature ranging from -5 DEG C to 40 DEG C; then the obtained stainless steel is put into a solution containing titanium ions to be deposited for 0.1 h to 6 h; and finally the obtained stainless steel is put into a solution containing silver ions to be deposited for 0.1 h to 6 h, and therefore the antibacterial stainless steel is obtained. The concentration of the dopamine buffer solution ranges from 0.01 mol / L to 1 mol / L, the concentration of the solution containing the titanium ions ranges from 0.001 mol / L to 1 mol / L, and the concentration of the solution containing the silver ions ranges from 0.001 mol / L to 1 mol / L. By means of the antibacterial stainless steel and the preparing method thereof, the technology is simple, environment friendliness is achieved, and the cost is low; the surface antibacterial nanometer film layer structure of the antibacterial stainless steel prepared through the method is well-defined and orderly, is firmly combined with a base material, is high in corrosion resistance and hardness and has good antibacterial performance both under the illumination condition and the non-illumination condition.

The present invention discloses a production technology of lactitol. Lactose is added into deionized water to prepare a lactose solution, pH is adjusted, a certain amount of a catalyst is added, a hydrogenation reaction is conducted under high temperature and high pressure to obtain a lactose hydrogenation solution, after the catalyst is removed, a lactitol solution is obtained, the lactitol solution is then purified, and concentration, crystallization and drying are conducted to obtain lactitol crystals. A primary crystallization yield of the lactitol relative to the lactose raw material reaches 55.0%-68.0% and a total yield of the lactitol relative to the lactose raw material reaches 92.2%-96.5%. At the same time, the technology is simplified in processes, liable for production and operation and also relatively low in production cost.

The invention belongs to the field of powder titanium alloy materials and relates to a preparation method for mixed powder of nanometer materials and titanium alloy, in particular to the preparation method for mixed powder of graphene and titanium alloy. Firstly, spherical titanium alloy powder is prepared by the method of argon atomization or plasma rotation electrode atomization; then, accurately weighed graphene nanosheets are added to absolute ethyl alcohol, dispersion treatment is conducted by a high-speed dispersion stirrer and an ultrasound cell pulverizer, and a graphene solution is prepared; finally, the spherical titanium alloy powder and the graphene solution are stirred and mixed in a quantitative burdening tin of a temperature-controlled mechanical stirring device, mixed powder slurry of the graphene and the titanium alloy is prepared, and the mixed powder of the graphene and the titanium alloy is obtained after drying treatment and vacuum degassing. According to the preparation method for the mixed powder of the graphene and the titanium alloy, the dispersion performance of the graphene nanosheets in the titanium alloy powder is improved, the operation method is easy, the technological parameters are accurately controlled, the preparation method is suitable for batch preparation of the mixed powder of the graphene and the titanium alloy, and the application prospect is wide.

The invention relates to the field of rapid restoration materials for disease asphalt pavements and application of the rapid restoration materials, and especially relates to an SMA mixture, and a preparation method and application thereof. The SMA mixture is composed of, in parts by weight, 7-8 parts of aggregate, 2-4 parts of mineral powder, 0.35-0.45 part of fiber and 2-3 parts of additives. The additives comprise resin, modified asphalt, heavy traffic paving asphalt, an asphalt regenerant and a milling material. The preparation method of the SMA mixture comprises: preparing a primary finished product of the additive, preparing a semi-finished product of the additive, adding mineral powder, adding other raw materials and stirring and performing detection, so as to obtain the SMA mixture. By combining a construction method for the asphalt disease pavement and accurately controlling the technological parameters of steps, rapid appropriate fusion among joints can be realized, the step of adding modified asphalt for filling joints in the conventional technology is avoided, the cost is reduced and the construction period is shortened.

The invention discloses a method for preparing 17 beta-cyano-17 alpha-hydroxy-9-dehydroandrostenedione. The method comprises the following steps: (1) dispersing 9-dehydroandrostenedione (I) and acetone cyanohydrin (II) into an organic solvent; (2) carrying out a cyanohydrination reaction on the obtained mixed raw material liquid in a tubular reactor filled with strongly basic ion exchange resin, and (3) carrying out post-treatment on the material liquid after the cyanohydrination reaction to obtain 17beta-cyano-17alpha-hydroxy-9-dehydroandrostenedione (III), the reaction formula of which is shown in the specification.

A dryer is set with fan and air heater or air humidifier symmetrically at top and bottom position of net belt to make hot air or wet air directly form circulation at top and bottom of material layer in box based on existing machine so no need of drying side chamber and humidifying side chamber.

The invention relates to a colored stainless steel based on ion implantation and a preparation method thereof. The technical scheme is as follows: placing a stainless steel to be colored in a vacuum chamber of an ion implantation apparatus, vacuumizing to 0.1-1*10<-5>Pa, and implanting ions on the surface of the stainless steel to obtain the colored stainless steel, wherein the accelerating voltage for ion implantation is 10-100kV, and the ion implantation amount is 1*10<17>-1*10<19> ions / cm<2>; or placing a stainless steel to be colored in a vacuum chamber of an ion implantation apparatus, vacuumizing to 0.1-1*10<-5>Pa, and implanting ions on the surface of the stainless steel, wherein the accelerating voltage for ion implantation is 10-100kV, and the ion implantation amount is 5*10<15>-5*10<19> ions / cm<2>; and taking out, carrying out heat treatment, and cooling to room temperature in the furnace to obtain the colored stainless steel. The invention has the advantages of simple process and clean environment, and the obtained colored stainless steel has the characteristics of multiple color varieties, high reproducibility, uniform color, beautiful appearance, high durability and no separation. Compared with the stainless steel prior to preparation, the surface hardness and the corrosion resistance are obviously improved.

The invention discloses double-skin milk. The double-skin milk is made of, by weight, 10-15 parts of milk, 60-70 parts of cream, 6-10 parts of egg white, 2-5 parts of xylitol, 1-3 parts of stevia rebaudianum, 1-3 parts of sweet oxalic acid and 1-3 parts of aspartame. Milk and cream are adopted as raw materials, egg white, xylitol, stevia rebaudianum, sweet oxalic acid and aspartame are added, and the ingredients are mixed to form the double-skin milk. The made double-skin milk is fragrant in smell, smooth in taste, fine and smooth in taste, agreeably sweet, rich in level and particularly suitable for being eaten by people suffering from diabetes.

The invention belongs to the field of powder titanium alloy materials and relates to a preparation method for mixed powder of nanometer materials and titanium alloy, in particular to the preparation method for mixed powder of graphene and titanium alloy. Firstly, spherical titanium alloy powder is prepared by the method of argon atomization or plasma rotation electrode atomization; then, accurately weighed graphene nanosheets are added to absolute ethyl alcohol, dispersion treatment is conducted by a high-speed dispersion stirrer and an ultrasound cell pulverizer, and a graphene solution is prepared; finally, the spherical titanium alloy powder and the graphene solution are stirred and mixed in a quantitative burdening tin of a temperature-controlled mechanical stirring device, mixed powder slurry of the graphene and the titanium alloy is prepared, and the mixed powder of the graphene and the titanium alloy is obtained after drying treatment and vacuum degassing. According to the preparation method for the mixed powder of the graphene and the titanium alloy, the dispersion performance of the graphene nanosheets in the titanium alloy powder is improved, the operation method is easy, the technological parameters are accurately controlled, the preparation method is suitable for batch preparation of the mixed powder of the graphene and the titanium alloy, and the application prospect is wide.