290results about How to "Reduce hardness" patented technology

The invention discloses active brazing filler metal for sealing sapphire and kovar alloy and a preparation method of the active brazing filler metal. The active brazing filler metal comprises 25.0 wt%-27.5 wt% of Cu, 1.0 wt%-6.0 wt% of Ti, 1.0 wt%-5.0 wt% of Al, 0.1 wt%-1.0 wt% of B, 0.1 wt%-0.5 wt% of rare earth element RE, RE is one or more of La, Ce, Sc, Pr, Nd and Er, and the balance is Ag. The preparation method comprises the following steps: preparing silver-based pre-alloying powder by adopting a gas atomization method, mixing the alloy powder with additive element powder in a ball milling manner, sintering by utilizing vacuum pressure to obtain an alloy ingot blank, and carrying out rough rolling, intermediate annealing and finish rolling to obtain an active brazing filler metal strip with the thickness of 0.05-0.2 mm. The active brazing filler metal is well matched with the thermal expansion coefficient of sapphire, direct brazing of sapphire and Kovar alloy can be achieved, the brazing temperature is moderate, and a brazed joint is uniform in structure and free of defects such as air holes and cracks.

The invention provides a display screen and electronic equipment. The display screen comprises a display module and a display module, wherein the display module comprises a cambered surface section and a plane section; the supporting plate comprises a first supporting section, a second supporting section and a third supporting section, the second supporting section is located between the first supporting section and the third supporting section, the first supporting section is attached to the plane section, the second supporting section, the third supporting section and a connecting gap between the second supporting section and the third supporting section form a bent section, and the bent section is attached to the cambered surface section; the surface of the second supporting section is provided with a concave area, the hardness of the second supporting section is smaller than that of the first supporting section, and the hardness of the third supporting section is smaller than that of the first supporting section or the second supporting section. The second supporting section is provided with a concave area, so that the hardness of the second supporting section is smaller than that of the first supporting section, and bending of the second supporting section is facilitated. The hardness of the third supporting section is smaller than that of the first supporting section or the second supporting section, bending of the third supporting section is facilitated, attaching of the bent section and the cambered surface section is facilitated, and the problem that the supporting plate and the display module are prone to falling off is solved.

The invention provides a beneficiation and enrichment method for high-molybdenum oxide ore, which comprises the following steps of: performing fraction magnetic separation on a product after ore grinding, regrinding magnetic separation coarse particle tailings, mixing the reground product with magnetic separation fine fraction tailings to perform low-potential sulphide ore flotation, performing oxidized ore flotation on sulphide ore flotation tailings, and the like. And finally, the molybdenum concentrate with the high recovery rate and grade is obtained, the molybdenum ore separation and enrichment effect is achieved, and the fine disseminated-particle-size refractory molybdenum oxide ore resources in the high-oxidation-type molybdenum ore are effectively and comprehensively recycled. In order to quickly optimize and obtain the optimal condition of oxidized ore flotation, the flotation inhibitor with the good inhibition effect is determined through the pure ore flotation test, the flotation collecting agent with the high selectivity is selected through the molecular simulation calculation method, and the flotation efficiency and selectivity are improved. The method provided by the invention can be widely applied to the fields of development of high-oxidation molybdenum ore mines and recycling of fine-fraction refractory molybdenum oxide ore resources in tailings after sulfuration flotation.

The invention provides perfluoroether fluororubber as well as a preparation method and application thereof. The perfluoroether fluororubber is in an A-B-A block form; the A block is formed by polymerizing tetrafluoroethylene and perfluoropropyl vinyl ether, and the molar ratio of the tetrafluoroethylene to the perfluoropropyl vinyl ether is (65 to 80): (20 to 35); the block B is formed by polymerizing tetrafluoroethylene and perfluoromethyl vinyl ether, and the molar ratio of the tetrafluoroethylene to the perfluoromethyl vinyl ether is (35-55): (65-45); and the mass fraction of the block B in the perfluoroether fluororubber is 50%-80%. The perfluoroether fluororubber has excellent high temperature resistance, can resist the high temperature of 320 DEG C, has excellent elongation, and is low in hardness, small in compression deformation and good in medium resistance and processability.

The invention relates to the technical field of punch forming, and particularly discloses a part punch forming machine for automobile fan motor production. The bottom of the stamping part is fixedly connected with a base, the middle of the inner side of the base is fixedly connected with a cooling part, and the top of the cooling part is fixedly connected with the bottom of the stamping part. Water flow in the water tank enters the cooling groove through the water outlet mechanism, the water flow continuously moves in the cooling groove through continuous work of the pressure pump until the water flow enters the water tank through the water inlet pipe, continuous water flow circulation work is conducted, and when punching work is conducted, the water flow can flow through circulation flow of the water flow; and the temperature of the surface of the lower die base is reduced, so that the situation that the hardness of the surface of the die is possibly reduced due to the high temperature during long-time stamping work, and abrasion of the die is aggravated in the stamping process is avoided.

The invention belongs to the technical field of semiconductor graphite materials, and particularly relates to a semiconductor graphite material and a preparation method thereof. The semiconductor graphite material comprises the following raw materials in percentage by mass: 23-33% of pitch coke powder, 23-33% of green petroleum coke powder, 5-15% of artificial graphite powder, 3-8% of natural graphite powder and the balance of modified pitch. The semiconductor graphite material disclosed by the invention has relatively high breaking strength, compressive strength, hardness and density; the prepared ceramic has low resistivity, porosity and ash content, the preparation process is simpler, and the production cost is reduced.

The present invention relates to the technical field of waterproofing coiled materials, and discloses a composition for polyvinyl chloride waterproofing coiled materials, a polyvinyl chloride waterproofing coiled materials, and a preparation method and application thereof. The composition contains polyvinyl chloride, ethylene-vinyl acetate-carbon monoxide copolymer, a plasticizer, a filler, expandable microspheres, a crosslinking agent, and an antioxidant; relative to 100 parts by weight of polyvinyl chloride, the content of ethylene-vinyl acetate-carbon monoxide copolymer is 10-40 parts by weight, the content of the plasticizer is 35-50 parts by weight, the content of the filler is 20-55 parts by weight, the content of the expandable microspheres is 1-3 parts by weight, the content of the crosslinking agent is 1-3 parts by weight, and the content of the antioxidant is 0.1-0.4 parts by weight. The polyvinyl chloride waterproofing coiled material not only has strong tensile strength and elongation, but also has good waterproof function while being able to insulate and heat.

The utility model discloses a bending device for bracket processing, which relates to the technical field of machining, and comprises a workbench and a bending mechanism, a bracket needing to be bent is clamped and fixed through a fixing frame, in the bracket bending process, a rotating shaft is driven by a motor to further drive the bracket to move and feed, and the bracket is bent by adjusting the length of a telescopic pipe. In the feeding process, impurities on the surface of the support are scraped off through a friction scraping plate, a support cleaning agent stored in a liquid storage box enters the limiting blocks through telescopic pipes and is sprayed to the surface of the support through through holes, stubborn impurities on the surface of the support are further removed, and the cleaning effect of the support is improved. The problem that the support is bent unevenly or deformed due to impurities is solved, the support is heated through the electromagnetic heating plate, the hardness and strength of materials are reduced, meanwhile, a cleaning agent is dried, and it is prevented that the cleaning agent stays on the surface of the support, secondary pollution is caused to the support, and the quality of the support is affected.

The utility model provides a battery and electric equipment, and relates to the field of batteries. A battery includes a battery cell and a support. The battery monomer comprises a shell and a pressure relief component, the shell comprises a first wall part, and the pressure relief component is arranged on the first wall part. The pressure relief part comprises a first groove, and the pressure relief part is configured to be capable of cracking along the first groove when the battery monomer is subjected to pressure relief. The supporting piece supports the first wall part and is provided with a supporting face facing the first wall part, and the supporting face is provided with an avoiding part. The projection of the first groove is located in the avoiding part in the thickness direction of the first wall part. The avoiding part is arranged on the supporting piece, and the projection of the first groove in the thickness direction of the first wall part is located in the avoiding part, so that the avoiding part can avoid the first groove, the supporting piece is not easy to abut against the outer side of the first groove when the battery monomer is subjected to pressure relief, the cracking of the first groove is not easy to inhibit, and the service life of the battery monomer is prolonged. Therefore, the first groove can crack in time when the battery monomer is decompressed, and the reliability of the battery is improved.

The utility model discloses an oxyhydrogen atomizing machine which comprises a water storage tank, an electrolytic bath, an oxygen water collector, a hydrogen water collector and two groups of gas path radiators, the water outlet end of the water storage tank is connected with the water inlet end of the electrolytic bath; the electrolyte enables water to be decomposed into oxygen and hydrogen under the action of direct current in the electrolytic bath; the oxygen output end of the electrolytic bath is connected with the water inlet end of the water storage tank through a group of gas path radiators, the oxygen output end of the water storage tank is connected with the oxygen water collector, and dried and cooled oxygen is obtained after separation by the oxygen water collector; the hydrogen output end of the electrolytic bath is connected with the hydrogen water collector through the other group of gas path radiators; and dry and cooled hydrogen is obtained after separation by the hydrogen water collector. The gas path radiator is additionally arranged at the gas output end of the electrolytic bath, gas electrolyzed by the electrolytic bath is pre-cooled and then separated through the water collector, finally, dry and pure hydrogen and oxygen are obtained, and influences on subsequent gas purity, the service life of equipment and safety are effectively avoided.

The invention discloses a preparation method of a high-hardness and low-roughness micro-arc oxidation film of an annular aluminum part, relates to the technical field of surface treatment, and aims to solve the technical problems that the thicknesses of film layers on the inner surface and the outer surface of the annular aluminum part subjected to existing micro-arc oxidation treatment are not uniform, and the formed micro-arc oxidation film is low in hardness and too large in roughness. The preparation method of the micro-arc oxidation film comprises the steps that after an annular aluminum piece is sequentially immersed in a first solution and a second solution, the annular aluminum piece is taken out and dried, and the micro-arc oxidation film is formed on the surface of the annular aluminum piece; wherein the first solution comprises phosphate, silicate, EDTA (Ethylene Diamine Tetraacetic Acid) salt, hydroxide and tartrate; the second solution comprises hexametaphosphate, silicate, villiaumite, EDTA (Ethylene Diamine Tetraacetic Acid) salt, hydroxide and citrate. According to the technical scheme, the preparation method of the high-hardness and low-roughness micro-arc oxidation film of the annular aluminum part and the micro-arc oxidation film prepared through the preparation method are provided.

The invention provides a high-hardness wastewater chemical membrane coupling softening method which comprises the following steps: firstly, carrying out chemical pretreatment on high-hardness wastewater to obtain softened wastewater, and carrying out flocculent precipitation on the softened wastewater to remove suspended solids and residual hardness ions in the softened wastewater to obtain flocculent precipitation wastewater; the method comprises the following steps: flocculating and precipitating wastewater, filtering the flocculated and precipitated wastewater to obtain filtered wastewater, carrying out membrane separation on the filtered wastewater to obtain separated wastewater, and carrying out evaporative crystallization on the separated wastewater to crystallize salt in the separated wastewater so as to soften the high-hardness wastewater. According to the method, through coupled use of chemical pretreatment and a membrane technology, the softening efficiency is improved, the use of chemical agents is reduced, and the treatment cost is reduced.

The invention discloses a microalloyed high-toughness martensitic stainless steel cutter head as well as a preparation method and a preparation mold thereof. Stainless steel comprises the following components in percentage by weight: 0.3%-0.7% of C, 0.3%-1.0% of Si, 0.5%-1.5% of Mn, 16%-18.5% of Cr, 1%-2% of Ni, 0.3%-0.8% of Mo, 0.1%-0.35% of V, 0.1%-0.25% of Nb, less than or equal to 0.02% of S, less than or equal to 0.02% of P and the balance of Fe. Firstly, raw materials are smelted into molten iron; then adding a deoxidizing agent and precoated sand into the molten iron for molding, and performing sand mold casting and pouring to obtain a cutterhead blank; carrying out heat treatment on the cutter head blank; and finally, shot blasting and polishing are conducted on the cutterhead subjected to heat treatment. The martensitic stainless steel cutterhead has a metallographic structure which takes a martensitic structure as a main structure, takes austenite as an auxiliary structure and dispersedly distributes CrC, VC and NbC particles, the hardness of the martensitic stainless steel cutterhead is 40-45 HRC, the impact toughness of the martensitic stainless steel cutterhead reaches 92-95 J / cm < 2 >, the abrasion resistance of the cutterhead is longer, the service life of the cutterhead is longer, and the abrasion loss of the martensitic stainless steel cutterhead is reduced by 70% compared with a cutterhead without alloy elements.

The invention belongs to the technical field of alloys, and particularly relates to a rolled-state tough titanium alloy and a preparation method thereof.The rolled-state tough titanium alloy is obtained by smelting sponge titanium, aluminum particles and a titanium-molybdenum intermediate alloy, then heating the smelted sponge titanium, aluminum particles and the titanium-molybdenum intermediate alloy and then adopting a hot rolling mode. The rolled-state tough titanium alloy obtained through the method is fine in grain and uniform in structure, all components are evenly distributed, the technical defects of as-cast-state Ti-6Al-xMo alloy are overcome, and the mechanical property is effectively improved.

The utility model discloses a novel medicine grinding device for traditional Chinese medicine tumor, relates to the technical field of medical auxiliary instruments, and realizes efficient grinding of medicine for traditional Chinese medicine tumor, and adopts the technical scheme that the novel medicine grinding device comprises a case body and a knife type grinding barrel, the case body is detachably connected with the knife type grinding barrel, and a workbench is arranged in the middle of the case body; a pneumatic pump is arranged on the top of the workbench, a displayer is arranged on one side of the pneumatic pump, a pressing column is arranged at the output end of the pneumatic pump, a pressing hammer is arranged at one end of the pressing column, a pressing piece switch is arranged on one side of the top of the workbench, a pressing groove is formed in one side of the workbench, and a barrel cover is arranged on the top of the knife type grinding barrel. According to the traditional Chinese medicine tumor medicine grinding device, various technologies such as the pressing hammer, the knife type grinding barrel and the sieve plate are comprehensively applied, so that the traditional Chinese medicine tumor medicine grinding device is suitable for grinding requirements of different types of traditional Chinese medicine tumor medicines, the grinding effect and the working efficiency are improved, and the traditional Chinese medicine tumor medicine grinding device has the beneficial effects of convenience in cleaning, dust prevention, multiple functions and the like.

The invention relates to the technical field of gordon euryale seed crushing, and particularly discloses a gordon euryale seed crushing and screening device and method. The number of the crushing rollers is two, and the two crushing rollers are horizontally arranged at the upper part of the crushing box; the occlusion strips are fixedly connected to the outer walls of the two crushing rollers, and when the occlusion strips on the two crushing rollers are occluded with each other, the gordon euryale seed particles can be crushed into fine particles; and the two driving rollers are mounted in the middles of the two crushing rollers correspondingly. According to the gordon euryale seed crushing device, the two crushing rollers are arranged, when gordon euryale seeds need to be crushed, the gordon euryale seeds are placed between the two crushing rollers, the gordon euryale seeds are extruded and crushed by the occlusion strips on the crushing rollers, the gordon euryale seeds are extruded into fine particles, the crushing effect is achieved, and due to the fact that the occlusion strips on the two crushing rollers are in an occlusion state all the time, the gordon euryale seeds are crushed. Therefore, the gordon euryale seeds cannot be directly taken out by the crushing rollers, and each gordon euryale seed can be extruded and crushed.

The present invention belongs to the technical field of micro-nano materials, and in particular, relates to a chemical self-assembly method of large-sized porous silver, which uses a silver nitrate solution as a precursor reagent, prepares nano silver particles with different morphologies by adding different mixed reducing agents, and self-assembles the generated nano silver particles by controlling the pH value and temperature of the reaction, thereby generating large-sized micron-sized porous silver structures with four different morphologies of pine needles, corals, snowflakes and spheres. Compared with the traditional dealloying method and template method, the chemical self-assembly method of large-sized porous silver provided by the present invention has the advantages of simple operation and short preparation cycle, and can also save certain costs, is more efficient, and is more suitable for large-scale batch production.

The present invention belongs to the technical field of plate vulcanizers, and discloses a plate vulcanizer for rubber conveyor belt production, including a support frame, a driving mechanism is arranged on the outer side of the support frame, a vulcanizing mechanism is arranged above the inner cavity of the support frame, and a cooling mechanism is arranged at the bottom of the inner cavity of the support frame; the driving mechanism includes a mounting frame, the mounting frame is fixedly connected to the outer side of the support frame, and a motor is fixedly connected to the side of the mounting frame away from the support frame. The present invention adjusts the spacing of the moving table and the heat transfer oil space in the inner cavity of the upper pressure cavity heating plate according to the width of the rubber conveyor belt to be vulcanized, so that the amount of heat transfer oil changes, thereby avoiding heating the maximum amount of heat transfer oil each time, reducing the energy consumption of the electric heating rod, saving energy and protecting the environment, and because the excess part of the rubber conveyor belt is not vulcanized and has a low hardness, it is convenient for the L-shaped cutting knife to cut it into sections and facilitate subsequent recycling.

The invention discloses optical glass, a prefabricated member thereof, an optical element and an optical instrument, and relates to the technical field of optical glass. The optical glass comprises the following components in percentage by weight: 2 to 15.2 percent of SiO2; 8 to 22 percent of B2O3; la2O3: 40% to 60%; 3 to 18 percent of Y2O3; zrO2: 1%-15%; 2 to 15 percent of Nb2O5; 0 to 9 percent of Gd2O3; znO: 0 to 10%; 0 to 10 percent of Ta2O5; 0 to 6 percent of TiO2; 0 to 10% of RO; 0 to 8% of Rn2O; 0 to 8 percent of WO3; 0 to 5 percent of Al2O3; 0 to 8 percent of Yb2O3; 0 to 5 percent of GeO2; 0-1% of a clarifying agent; (Gd2O3 + ZnO) / Y2O3 is 2.0 or less; the thermal expansion coefficient alpha-30 / 70 DEG C of the optical glass is below 85 * 10 <-7 > / K, and the abrasion degree FA is 75-120. The high-refractive-index optical glass obtained by the invention has relatively low thermal expansion coefficient and excellent abrasion degree.

The present invention discloses a hollow cathode high temperature heater, which is used to heat the emitter in the cathode tube, and comprises: an insulating liner, a heating element, a skeleton, and a multi-layer carbon felt heat shielding layer, which are coaxially nested and assembled from the inside to the outside; the insulating liner and the skeleton are both high temperature resistant insulating ceramics; the heating section, lead end and lead fixing of the heating element are integrally processed with isostatic high-density graphite, and the cross-section of the lead end of the heating element is significantly larger than that of the heating section; the insulating liner is a thin-walled cylinder, which is completely and tightly fitted with the inner wall of the heating element and the outer wall of the cathode tube, and the insulating liner and the ceramic skeleton realize structural clamping and reliable insulation of the heating element. The present invention uses isostatic high-density graphite as the heating element, which has low cost, high reliability, strong high temperature resistance, high heating efficiency, and long service life. The design of the lead end, insulating liner, skeleton, and heat shielding layer improves the efficiency of inward heat conduction, reduces unnecessary heating and heat dissipation, and has a simple process and is easy to manufacture, assemble and debug.

A bionic rock-invading agent for silicate rock crushing and an auxiliary rock-breaking method thereof are provided, wherein an oxalic acid-sodium oxalate buffer solution OA is prepared, which comprises, by weight percentage, 0.6% to 1.1% of oxalic acid and 1.2% to 5.5% of sodium oxalate; a bionic neutral rock-invading agent ON is prepared, and the following four components, by weight percentage, are added to OA in a certain weight ratio: 0.05% to 0.3% of polyacrylamide, 1.0% to 3.1% of triethanolamine, and 0.3% to 5.5% of citric acid. 1.5%, trisodium nitrilotriacetic acid 2.0% to 5.0%, wherein the purity of polyacrylamide is ≥ 99.5%; the purity of triethanolamine is ≥ 99.5%; the purity of citric acid is ≥ 99.5%; the purity of trisodium nitrilotriacetic acid is ≥ 99.5%; during TBM excavation or oil drilling, the configured bionic rock-invading reagent is sprayed from the TBM cutter head to the face or pumped into the hollow of the drill string; thereby degrading the mechanical properties of the rock and achieving mechanical-chemical coupling rock breaking. The bionic rock-invading reagent of the present invention is neutral, has no obvious corrosiveness to mechanical rock-breaking tools, is environmentally friendly and efficient, and is particularly suitable for chemically assisted rock breaking of hard rocks such as silicate rocks.

The invention discloses a method for regulating and controlling meat quality of weever by changing feeding environment salinity, and relates to the technical field of fish culture, the method comprises the following steps: step 1, selecting feeding objects and feeding environment: selecting juvenile weever which is robust in physique and uniform in specification as experimental objects, and equally dividing the selected experimental objects into two groups, one group is an experimental group, and the other group is a control group; 2, measuring the water quality of the culture ponds: detecting the salinity and other parameters of the culture ponds by using a water quality testing tool, and ensuring that the initial parameters of the two groups of culture ponds are consistent; 3, selectively adding salt specially used for the culture pond or introducing high-salinity natural seawater in proportion; and 4, calculating the addition amount. According to the method, the salinity of the water body after the weever passes through the fry stage is larger than that of the water body in the fry stage, so that the muscle fiber density of the weever is reduced, the hardness and chewiness of fish meat are reduced, the fish meat is tender, juicy and good in taste, and the effect of regulating and controlling the meat quality of the weever is achieved.

The application belongs to the technical field of molds, and particularly relates to a mold for manufacturing a gas chamber core with an exhaust passage and a use method thereof. In order to solve the problems in the prior art that, when the exhaust passage of the gas chamber core is manufactured, the mold for the gas chamber core is provided with a movable block, the movable block cannot be placed with a filler, the punching method is used to cause low production efficiency and high production cost, and manual placement of the movable block causes production safety risks in the prior art. The application comprises a mold body, a movable block and a power device. The mold body is internally provided with a cavity of the gas chamber core, and a sand shooting port is arranged on the side surface and communicates with the cavity. The cavity comprises a cavity of the gas chamber core body and a connecting side cavity. The position of the connecting side cavity corresponds to the position of a connecting end of the gas chamber core and a runner core. The cavity of the gas chamber core body communicates with the connecting side cavity. The movable block is slidingly installed in the connecting side cavity, one end of the movable block is connected with a power end of the power device, and the other end of the movable block is internally provided with a hollow cavity. A heat insulation piece is installed in the hollow cavity.

This invention discloses a processing device and installation method for a manhole hoop ring in a diaphragm. The processing device includes a straightening rod assembly, which comprises a telescopic rod, a screw top plate, a hoop ring clamping plate, and a locking component. The screw top plate is located at both ends of the telescopic rod, and the locking component is located between the screw top plate and the hoop ring clamping plate. The installation method includes the following steps: 1. Fixing the half hoop ring on a straightening platform; 2. Preheating the half hoop ring using a hoop ring reciprocating heater; 3. Straightening the half hoop ring by bending; 4. Fixing the straightening rod assembly onto the half hoop ring; 5. Installing the half hoop ring into the manhole of the diaphragm; 6. Straightening the half hoop ring using the straightening rod assembly and spot welding it in place. The processing device in this invention is easy to adjust and highly applicable, solving the problem of installation issues caused by size mismatch between the existing hoop ring and the manhole of the diaphragm. The installation method is easy to operate, step-by-step, and has low operational difficulty. Adjustments can be made promptly during installation, ensuring installation quality.

The invention relates to an aluminum cover production process which comprises the following steps: S1, checking the specification, size, surface quality and chemical components of an alloy aluminum plate, and transferring the alloy aluminum plate from a warehouse to a position near a production line for cutting; s2, a plate shearing machine is used for shearing the coiled material or the flat plate aluminum material into the size and shape suitable for follow-up machining, and heating treatment is carried out; s3, the heated metal plate is placed in a die of a punching machine to be stretched for the first time, and force is applied to enable the material to be preliminarily deformed in the die; s4, on the basis of the first-time stretching, the stretching strength and speed are adjusted for second-time stretching, and the shape and size of the part are further refined; s5, the shape of the part is continuously refined through third-time stretching; s6, fourth-time stretching is conducted by accurately controlling stretching parameters, it is ensured that the size and shape of the part meet the design requirements, and fine forming of the part is completed; the method is simple, and the problems that the metal material is too high in hardness, low in plasticity and poor in machining performance are effectively solved.

This invention provides a QPQ surface strengthening method for flexible and rigid wheels in harmonic reducers, comprising the following steps: after machining the flexible or rigid wheel, it is sequentially degreased, cleaned, dried, and preheated; the preheated flexible or rigid wheel is nitrided to form a nitrided layer on its surface; the surface of the flexible or rigid wheel is treated mechanically or by tumbling; the polished flexible or rigid wheel is placed in molten oxide salt for oxidation treatment to form an oxide layer on the surface of the nitrided layer; after the oxidized flexible or rigid wheel is air-cooled, it is immediately rinsed with clean water and dried with hot air, and then coated with anti-rust oil. Compared with the prior art, this invention uses low-temperature salt bath nitriding and oxidation treatment, the QPQ process is short, has fewer process steps and is easy to control, and the salt bath can be recycled. The surface hardness of the workpiece reaches 800-850 HV, and the wear rate is reduced by more than 70% compared with the traditional tempering process, significantly extending the service life of the workpiece.

The invention discloses a quenched and tempered seamless line pipe with narrow strength fluctuation and a manufacturing method thereof. The quenched and tempered seamless line pipe comprises the following components in percentage by weight: 0.06-0.10% of C, 1.40-1.65% of Mn, less than or equal to 0.05% of Cu, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Cr, less than or equal to 0.30% of Si, 0.05-0.20% of Mo, 0.01-0.05% of Nb, 0.03-0.07% of V, less than or equal to 0.020% of Ti, less than or equal to 0.0005% of B, less than or equal to 0.015% of P, less than or equal to 0.005% of S and the balance of Fe or other impurity elements. And Cu + Ni + Cr is less than or equal to 0.10%. According to the method, the strength fluctuation of the whole seamless pipeline pipe product after thermal refining is smaller than 25 MPa, the strength performance stability can be improved, and the use performance of the product is improved.

The invention discloses a greenhouse vegetable ridge planting sealing disease prevention method. The method comprises the steps that firstly, collected paper is used for standby application, and a sealing material is manufactured; 2, ridging is carried out, watering ditches are formed in the middles of ridges, then film mulching is carried out, and field planting holes are punched in the film for field planting; and step 3, spreading a prepared sealing material on the film along the field planting opening, and sealing. The method has the characteristics of simplicity in operation, easiness in popularization, moisture prevention, high-temperature gas damage prevention, harmful gas overflow prevention, waste paper utilization and ecological environmental protection.

The invention discloses a cell wall associated kinase gene VvWAKL8 for regulating and controlling texture formation of grape fruits and application thereof, the cell wall associated kinase gene VvWAKL8 is cloned from the grape fruits for the first time, the nucleotide sequence of the cell wall associated kinase gene VvWAKL8 is as shown in SEQ ID NO.1, and the coded amino acid sequence is as shown in SEQ ID NO.2. Research finds that the VvWAKL8 is specifically and highly expressed in the hard-pulp grape variety, and subcellular localization analysis shows that the protein is localized in a cell membrane; instantaneous overexpression of VvWAKL8 in grape fruits can significantly improve fruit hardness and regulate pectin metabolism related gene expression, and verifies the core function of VvWAKL8 in fruit texture formation. The research reveals that the VvWAKL8 is a key gene for regulating and controlling the grape fruit texture for the first time, a brand new gene resource is provided for molecular marker-assisted breeding of a new storage-resistant grape variety, and an important foundation is laid for deeply analyzing a cell wall signal to regulate and control a molecular mechanism of fruit development.