84results about How to "Hardness adjustment" patented technology

The invention discloses powder metallurgy high-speed steel and a preparation method thereof. The method is simpler than the existing powder metallurgy high-speed steel preparation method, steps of high-speed steel mother alloy smelting, atomization for making powder and hot isostatic pressing are omitted, great equipment investment is not needed and the production cost of powder metallurgy high-speed steel is reduced. The impurity content of the powder metallurgy high-speed steel prepared by adopting the method provided by the invention is low and the using performance is excellent. The powder metallurgy high-speed steel provided by the invention is prepared through the steps of 1) preparing powder mixture: weighing raw materials according to set components and proportioning ratio, and mixing and ball-milling the raw materials in a roller-type ball mill to obtain the powder mixture; 2) molding: molding the powder mixture into pressed blanks through cold isostatic pressing; 3) sintering: sintering the pressed blanks in a vacuum or inert gas atmosphere by adopting a hot-pressing sintering technology, heating the pressed blanks to 1100-1250 DEG C during sintering, preserving heat for 30-90 minutes and keeping sintering pressure to be 10-40Mpa; 4) hot forging; 5) heat treatment.

The invention aims at providing a low carbon cast steel pellet low in raw material cost, uniform in shape, comparatively low in rigid deviation of metal texture and stable in clearing capability through optimizing a chemical composition including the containing volume of micro constituents. The low carbon cast steel pellet is characterized in that the low carbon cast steel pellet has the chemical composition of, by mass, 0.1 percent to 0.25 percent of C, 0.1 percent to 0.3 percent of Si, 0.4 percent to 1.0 percent of Mn, 0.3 percent to 1.0 percent of Cr, less than 0.05 percent of p, 0.05 percent of S, and the rest of Fe and unavoidable impurities.

The invention discloses a tough wear-resistant strengthened layer and a preparation method thereof. According to raw materials of the tough wear-resistant strengthened layer, 50wt%-80wt% of Ni-Co-Cr medium-entropy alloy powder is added, 20wt%-50wt% of strengthening phase ceramic powder is added according to the proportion of the medium-entropy alloy powder, the Ni-Co-Cr medium-entropy alloy powder and the strengthening phase ceramic powder are mixed to obtain mixed powder, and a 24CrNiMo matrix is clad with a composite coating through laser cladding; and the ceramic powder at least comprises WC powder, WC ceramic particles of the powder can be decomposed to different degrees in the laser cladding process to form W2C, M23C6, M7C3 and M6C compounds with the hardness between the hardness of a WC matrix and the hardness of an FCC matrix, and the compounds cooperate with externally-added ceramic strengthening phases to form an echelon strengthening effect on the FCC matrix of the medium-entropy alloy Ni-Co-Cr. The problems of surface layer high-temperature wear and thermal fatigue failures brought by high-speed emergency braking of an existing high-speed rail brake disc are solved.

The invention discloses ferritic stainless steel and a manufacturing process thereof. The ferritic stainless steel comprises Fe and modified chemical elements. The modified chemical elements comprise, by weight percentage, 0-0.02% of C, 0-0.55% of Si, 0-0.25% of P, 0-0.006% of S, 0-0.40% of Ni, 0-0.06% of Cu, 0-0.04% of Al and 0-0.02% of N and further comprise Cr, MN, Mo and Ti, wherein the mass percentage of Mo is not smaller than 0 and not larger than 0.05. The weight percentages of Cr, Mn and Mo have the following relations: Mo=1.063-1, 0<=Mo<=0.05%, another equation here as shown in the specification, and 0.20%+4(C+N)%<=Ti<=0.50%. The ferritic stainless steel is resistant to corrosion and erosion. According to the manufacturing process, the hardness of the ferritic stainless steel can be adjusted, so that the ferritic stainless steel can be applied to a heat exchanger of a nuclear power station, the situation that the material is monopolized by foreign countries is broken, and the cost is reduced.

The invention discloses a method for manufacturing patching wax used for precision casting wax mould, which is characterized in that the patching wax is manufactured by mixing and heating the following raw materials by weight percent: 50-70% of white vaseline and 30-50% of wax. By the method, not only the patching wax can effectively patch the rough flaws on the wax mould but also the rigidity ofthe patching wax can be adjusted according to the requirements; the patching wax is good in use effects and simultaneously low in price, and can reduce the production cost. Through detection, the casting cast by the wax mould patched by the patching wax manufactured by the invention has the roughness up to Ra 0.4-3.2mu m.

The invention discloses an acrylate/silicone-acrylate compound emulsion and a method for preparing the same. Acrylate emulsions are prepared from acrylate as a main monomer, polyoxyethylene alkyl ether ammonium sulfate as emulsifier and various functional monomers containing carboxyl and are compounded with an silicone-acrylate emulsion to prepare the novel compound emulsion. The process for preparing the compound emulsion is simple, and the compound emulsion not only has the good hydrophobicity, stain resistance, washability and recoatability of the silicone-acrylate emulsion, but also has the good film forming performance, glossiness and solvent resistance of the acrylate emulsion. The compound emulsion film has higher mechanical strength and stronger adhesive force, the problems that the silicone-acrylate emulsion film has lower strength, poor adhesion and the like are solved, and the application range of the silicone-acrylate emulsion film is enlarged. The acrylate/silicone-acrylate compound emulsion can be applied to the field of emulsion coatings for coating roofs, internal walls, external walls, kitchens and the like and also can be applied to the water-proof stain-resistance occasions. The acrylate/silicone-acrylate compound emulsion can improve the grade of the emulsion coating.

The purpose of the present invention is to provide a side airbag device which is configured so that the entire airbag can be promptly and accurately expanded to a correct position and so that the entire airbag can be inflated into a desired shape after the expansion. A side airbag device can be mounted in a seat side section of a vehicle and comprises: a long-shaped inflator (22); and an airbag including an inflatable bag-like section (20) and a partition section (for example, a partition wall section (40)) which divides the bag-like section (20) into a first gas chamber (50) and a second gas chamber (60). The first gas chamber (50) includes: a supporting inflation section (52) which can be expanded into a shape which gradually expands from the lower end to the upper end along the seat side section; and a protective inflation section (54) which can be expanded on the other end side of the supporting inflation section (52). The inflator (22) is disposed so as to be capable of supplying gas into the supporting inflation section (52). At least one gas flow hole (42h) is provided in the portion of the partition section, which separates the second gas chamber (60) and the supporting inflation section (52) of the first gas chamber (50). The second gas chamber (60) is provided below the first gas chamber (50).

The invention discloses special material and preparation method for injection molding level halogen-free flame retardation wire plug. The special material adopts elastic body and polyolefin resin as base material with expansion type flame retardant, flame retarding synergist, compatilizer, antioxidant and processing agent added. After intensive mixing, the special material is obtained through extrusion and pelleting by a BUSS mixing roll with autoweighing blanking device. The method has good mixing effect, stable compounding formula and high processing efficiency and the particles prepared via the method have even size and bright appearance. The flame retardation rating of produces prepared via the method reaches UL94V-0 level, the tiptop fusion index reaches 55g/10min, and Shore hardness is from 65A to 95A in case of qualified flame retardation level and high fusion index. The composite material provided by the invention is environmental-friendly material which completely meets current international environmental requirements on halogen-free material. The material which not only has good flame retardation performance and flowing property but also enables smooth surface and good felt of products is suitable for manufacturing various injection molding level wire plugs with high flame retardation requirements.

The invention discloses a 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube. The 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube comprises the following chemical components in percentage by mass: 0.029-0.031% of C, 0.55-0.59% of Si, 1.12-1.14% of Mn, 0.001-0.003% of S, 0.015-0.017% of P, 17.55-17.75% of Cr, 10.15-10.25% of Ni, 0.33-0.35% of Nb, 0.022-0.024% of Mo, 0.04-0.06% of N, 0.149-0.151% of Ti, 0.0013-0.0015% of Sb, 0.0007-0.0009% of Pb, 0.0012-0.0014% of Ce, 0.08-0.12% of rare earth elements and the balance of Fe and unavoidable impurities. The invention further discloses a production process of the 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube. The 0Cr18Ni10Ti small-diameter seamless stainless steel capillary tube has good flexibility, corrosion resistance, high temperature resistance, wear resistance, tensile strength and water resistance and also has excellent electromagnetic shielding performance.

The present invention provides a surface treatment method of a valve mechanism component capable of providing a product that can stably achieve a predetermined pulsation reducing effect and that can maintain the pulsation reducing effect for a long period of time. Around the suction hole 24 (seat surface 51 ) of the valve plate 2 where the suction valve 30 abuts or on the portion of the suction hole 24 abutting the valve plate 2 , a plurality of recesses 60 are formed by laser processing. The convex portion 61 may be formed around the concave portion 60 by laser processing. When the convex portion 61 is formed, the hardness of the convex portion 61 is adjusted to be relatively higher than other portions by irradiation of laser light.

The invention discloses a detergent for human hairs and fiber hairs in the hair product industry, which comprises the following components in portion by weight: 5 to 35 portions of anionic surface active agent of one or a combination of more of alkylbenzene sulfonate, dodecyl benzene sulfonate, fatty alcohol-polyoxyethylene ether and fatty alcohol-polyoxyethylene ether sulfate, 1 to 5 portions ofnon-ionic surface active agent of lauric acid diethanolamide, 0.5 to 15 portions of latent solvent of one or a combination of sulfocarbamide and urea, 1.5 to 5 portions of thickening agent of sodium chloride, and 92 to 40 portions of deionized water. The detergent has good degreasing effect, can increase the smoothness of the human hairs and the fiber hairs, has good washing effect on both naturalhairs and artificial fiber hairs, is simple, convenient and easy to manufacture, generates no or little sewage, has low cost and simple washing operation process, and is easy to clean and saves water, and the human hairs and the fiber hairs after detergent washing are clean and generate no acerbity.

The invention discloses a compartment connection system capable of achieving soft and hard regulation. The system comprises automatic coupler devices. The two automatic coupler devices are correspondingly installed between two adjacent compartments respectively. The two adjacent compartments are connected through the two automatic coupler devices. Each automatic coupler device comprises a head joint at the front end, a damper in the middle and a tail joint on the tail portion. By means of the compartment connection system capable of soft and hard regulation, detachable connection between the two compartments can be quickly achieved. Meanwhile, the degree of hardness of the connection mode between the two compartments can be regulated adaptively, so that a monorail rail train is helped to turn when a turning radius is small, and accordingly space resources occupied by the train are saved.

The invention belongs to the technical field of environment-friendly coating preparation, and particularly relates to an aqueous polyurethane coating and a preparation method thereof. The aqueous polyurethane coating is prepared from the following components: hexamethylene diisocyanate trimer, dimethylol propionic acid, polyethylene glycol 1000, dimethylformamide, isophorone diisocyanate, triethylamine, trimethylolpropane, water, dibutyltin dilaurate, and isocyanate curing agent; the hexamethylene diisocyanate trimer is used as a raw material of the aqueous polyurethane coating to prepare water-based polyol with polyfunctionality, and greatly increases cross-linking density of a coating film; at the same time, by adding a trimethylolpropane aqueous solution into aqueous polyurethane polyol, the mass fraction of -OH in aqueous polyurethane is effectively improved, the adjustment of hardness of an aqueous polyurethane film is realized, the scrub resistance and wear resistance of the two-component aqueous polyurethane film are greatly improved, and the strength and surface finish of the aqueous polyurethane film are also improved; and, at the same time, the service life of the coatingis prolonged.

The invention provides an automotive stretch-resistant setting-type flat carpet. The automotive stretch-resistant setting-type flat carpet comprises a PET carpet fabric layer composed of, by weight, 90% of common PET fibers and 10% of low-melting-point PET fibers, an anticorrosion layer is arranged on the front surface of the PET carpet fabric layer, an expanding buffer layer is arranged on the back surface of the PET carpet fabric layer, a slip-resistant layer is arranged on the back surface of the expanding buffer layer and provided with slip-resistant stripes, an antistatic layer is arranged on the front surface of the anticorrosion layer, and a waterproof breathable layer is arranged on the front surface of the antistatic layer. The invention further provides a manufacturing method of the automotive stretch-resistant setting-type flat carpet. The automotive stretch-resistant setting-type flat carpet has the advantages of a certain hardness and stretchability, light weight, low smell, high impact resistance, good anticorrosion and slip-resistant effects, enhanced waterproof breathability and antistatic performance, simple manufacturing technology and high performance cost.

The invention discloses a cab active vibration reduction method and system and an engineering vehicle. The method comprises the steps that cushion and backrest vibration acceleration information and acorresponding vibration acceleration setting range are obtained, wherein the vibration acceleration information comprises a frequency peak value, pass frequency vibration and order tracking; whetherthe current cushion and backrest vibration acceleration is within the set range or not is judged; in response to the fact that the cushion and backrest vibration acceleration is not within the set range, an instruction is sent to control a proportional valve to be opened, and cushion and backrest air bag structures are inflated and deflated till the cushion and backrest vibration acceleration is adjusted to be within the set range; in the inflating process, pressure information of the cushion and the backrest air bags is obtained; in response to the fact that the pressure of the cushion and backrest air bags exceeds the corresponding upper limit values, an instruction is sent to control the proportional valve to be closed and stop inflating; in the inflating and deflating process, flow information of the cushion and the backrest air bags is obtained; and in response to the fact that the flow of the cushion and backrest air bags exceeds the corresponding limit values, an instruction issent to control reduction of the opening of the proportional valve.

The invention relates to a mattress with nonmetal elastic members. The mattress is used for replacing a structure of springs inside the mattress, and on the premise of no influence to the appearance and the integral effect of the original mattress, the problems that the service life is shortened and generated electromagnetic waves and heavy metals endanger the health of a human body due to rusting and deforming the springs inside the mattress can be avoided; and meanwhile, the comfort of the mattress is improved to ensure that the fatigue is effectively relieved. The mattress with the nonmetal elastic member comprises a base, an elastic member fixing piece embedded in the base, and an elastic layer formed by a plurality of nonmetal elastic members fixed by the elastic member fixing piece, wherein a pressure partitioning sheet which is adjustable in hardness and is used for decomposing and buffering the pressure from the upside is arranged at the top of each nonmetal elastic member; and the base is composed of a frame with a plurality of concave holding cavities, and is used for regulating the integral heights of the nonmetal elastic members.

The invention discloses a health mattress. The health mattress comprises a non-woven fabric mattress sleeve and a mattress core sleeved by the mattress sleeve. The health mattress is characterized in that the mattress core comprises a polyurethane slow-rebound foamed material layer, a pure natural coconut shred layer with thickness of 2-3cm and a pure natural coconut shred layer with thickness of 7-8cm. The polyurethane slow-rebound foamed material layer and the pure natural coconut shred layer with thickness of 2-3cm are bonded by a water-based adhesive. Surfaces of the pure natural coconut shred layer with thickness of 2-3cm and the pure natural coconut shred layer with thickness of 7-8cm are bonded with non-woven fabrics by the a water-based adhesive. The polyurethane slow-rebound foamed material layer has hardness of 15-30HF. The health mattress is safe and environmentally friendly, has adjustable hardness satisfying human body demands, has slow-rebound performances, good softness, good air permeability and good support effects, and has a good health care function.

The invention discloses a manufacture method for one-step foam molding of a three-density sole. The manufacture method mainly comprises the following steps of 1, orderly overlapping a high-elasticity EVA sheet layer, an EVA bridge sheet layer and a rubber foamed sheet layer from top to bottom to obtain a three-density foamed sheet layer, 2, putting the three-density foamed sheet layer into a metal mold pre-heated to a temperature of 140 to 150 DEG C, and carrying out hot-pressing molding by a steam oil hydraulic press at a temperature of 150 to 165 DEG C under the pressure of 150 tons for 8 to 16 minutes, 3, taking out the three-density foamed sheet layer subjected to oil hydraulic molding from the metal mold, cutting off rim charge, keeping flat, and carrying out compulsory blowing by a fan for cooling, and 4, naturally cooling the cooled three-density foamed sheet layer for 36 to 48 hours to obtain a three-density sole. The manufacture method avoids manual gluing of a sole, effectively reduces a labor cost, reduces energy consumption, is safe and environmentally friendly, greatly improves production efficiency and a product yield, and obviously improves economic benefits of enterprises.

The invention provides a hardness-adjustable mattress which comprises a rubber layer, an interlayer and a bottom plate from top to bottom; electrically conductive springs for supporting are arranged between the rubber layer and the interlayer, and the electrically conductive springs are connected in parallel in a circuit; a flexible compression layer is arranged between the interlayer layer and the bottom plate, iron cores which are vertically fixed to the bottom plate and correspond to the electrically conductive springs one to one are arranged in the flexible compression layer, and notches right facing the iron cores one to one are formed in the interlayer layer; when the flexible compression layer is compressed, the iron cores pass through the notches and enter the electrically conductive springs. The hardness of the mattress can be adjusted according to user requirements, and the mattress has wide applicability.