126results about How to "Consistent hardness" patented technology

The invention discloses a flux-cored alloyed ductile cast iron homogeneous gas-welding wire which consists of H08A steel strip and alloyed flux-cored powder cladded in the H08A steel strip, and the flux-cored powder comprises the components based on the weight percentage: 10-20% of graphite, 50-60% of 75 Si-Fe, 5-8% of Ni, 2-5% of Ti, 3.8-6% of Mg, 0.8-2.5% of Bi, 1-2.5% of Zr, 2.0-4.5% of Ba, 1.5-2.8% of Ce and 4-6% of RE, and the total weight percentage is 100%. The invention also discloses an electric welding rod, a flux-cored welding core of which consists of the H08A steel strip and the alloyed flux-cored powder cladded in the H08A steel strip, and the coating applied on the welding rod comprises the components based on the weight percentage: 5-11% of marble, 10-20% of dolomite, 5-15% of potassium feldspar, 5-15% of fluorite, 8-16% of graphite, 15-25% of 75 silicoferrite, 6-10% of 30 calcium silicon alloy, 4-6% of aluminium powder, 3-7% of ferrous powder, 5-15% of white slime, 0.5-1.5% of NaCO3, 1-3% of RE-Y, and the total weight percentage is 100%. The gas-welding wire or the electric welding rod can realize normal temperature gas welding, cold welding or low temperature preheating welding.

The present invention discloses surface quenched chrome plated wound and welded roller making process, which includes the steps of hot winding, bottoming welding and processing bevel, coarse turning, surface quenching, semi-finish turning, assembling welding, finish machining and post-treatment. The process of the present invention is suitable for making roller of 500-1200 mm diameter, 25 mm wall thickness and 2050-2200 mm length, and roller surface is treated through quenching, sand blasting to roughen and chrome plating. The present invention has the advantages of saving in material, low making cost and short production period.

The invention discloses a welding material for rapidly welding and repairing defects of a large-scale grey iron casting, comprising the following components in percentage by weight: 33%-38% of Fe2O3, 27%-30% of Al, 1.4%-1.6% of Na2CO3, 4%-6% of Na2B4O7, 4%-6% OF CaF2 and 7%-10% of CaO7, wherein when the material is used for a large-scale HT150 grey iron casting, the material further comprises 4%-5% of G, 7%-10% of pig iron and 5%-8% of SiO2; when the material is used for a large-scale HT200 grey iron casting, the material further comprises 4%-5% of G, 7%-10% of pig iron, 4%-6.5% of 75 Si-Fe, 0.5%-3.2% of Ni and 0.1%-0.5% of Bi, based on the total weight of 100%; and when the material is used for a large-scale HT250 grey iron casting, the material further comprises 3%-4% of G, 6%-10% of pig iron, 4%-6% of 75 Si-Fe, 0.5%-3.2% of Ni, 0.1%-0.5% of Bi, 0.5%-1.8% of Ti, 1.8%-2.4% of 60Si-Ca and 0.5%-3.2% of Al2O3, based on the total weight of 100%. The invention discloses a method for rapidly welding and repairing defects of the large-scale grey iron casting, comprising the following steps: filling the welding material into a space formed by a groove and a dam, leading the welding material to carry out an exothermal reaction, slowly cooling, and removing the metal which is higher than the surface of the casting in a welding area. By using the material and the method of the invention, rapidly welding and repairing the defects of the large-scale grey iron casting can be achieved at room temperature.

The present invention relates to a stable bupropion hydrochloride tablet and a method of stabilizing bupropion hydrochloride tablets, which also serves as an improved tabletting process for the preparation of sustained release bupropion hydrochloride tablets.

The invention discloses a process for forging and grinding stainless steel, which comprises the following steps: (1) subjecting a cutter blank having a cross-section forged to taper shape; (2) primarily coarse-grinding a recessed arc surface at the middle part of a cutting tool by an edge formed by the end face and the circumference of a grinding wheel of a water mill machine; (3) secondarily coarse-grinding a blade edge by the end face of the grinding wheel of the water mill machine; (4) thirdly coarse-grinding the back of the cutting tool by the end face of the grinding wheel of the water mill machine; (5) primarily fine-grinding the recessed surface at the middle part of the cutting tool by the end face of a rubber grinding wheel of the water mill machine; (6) secondarily fine-grinding the blade edge by the end face of the rubber grinding wheel of the water mill machine; and (7) thirdly fine-grinding the back of the cutting tool by the end face of the grinding wheel. In the coarse grinding process, the temperature of the cutting tool is not larger than 200 DEG C, and the rigidity is unlikely to decrease after grinding. Compared with prior manual production, the mechanized process can ensure uniform surface lines, thickness and rigidity of the cutting tool, stable product quality, low rejection rate, simplified process, and greatly improved production efficiency.

The invention discloses a concentrate mixed granular material for breast-feeding female bamboo rats and a preparation method of the concentrate mixed granular material. The concentrate mixed granular material is prepared from the following components in percentage by weight: 40-55% of corn, 5-15% of wheat, 8-15% of soybean meal, 1-8% of fish meal, 5-10% of rice bran, 5-10% of brewer's grain, 1-5% of bagasse powder, 1-5% of cane molasses powder, 1-5% of bamboo leaf powder, 1-3% of monocalcium phosphate, 0.5-1% of shell powder, 0.1-0.5% of edible salt, 0.1-0.2% of compound vitamin, 0.1-0.2% of trace element premix, 0.3-0.5% of lysine, 0.1-0.2% of threonine, 0.05-0.1% of Chinese herbal additives, and 0.5-1% of loess. The concentrate mixed granular material is capable of meeting the nutritional requirements of the breast-feeding female bamboo rats to keep the disease resistance and the milk yield of the rats at the optimal level, and also capable of improving the growth performance and the survival rate of the breast-fed young bamboo rats; besides, the raw materials are convenient to get and the preparation method is simple.

The invention discloses a technology for manufacturing a steel wire cut pill, which takes a waste steel wire rope as the manufacture raw material. The process flow comprises the following steps of: breaking the rope, breaking the strand, cutting the pill, decontaminating, derusting and screening. The technology can manufacture the steel wire cut pill with 0.2-4mm, has good performance and cleaning effect, is difficult to crush the pill, and has small consumption level and long service life. Meanwhile, the waste steel wire rope used as the raw material is the industrial waste material, so that the material source is abundant, the production cost is low, and the environment pollution can be reduced. Furthermore, the decontaminating and derusting method of the steel wire cut pill comprises the step of adding saw timber powder in a stirrer to abundantly mix and stir, thereby effectively removing the greasy dirt, the rust stain and the foreign matter on the surface with the porous absorption capability and the surface scrubbing capability of the saw timber powder, reducing the problems of high cost, water waste, uncleanness and environment pollution caused by using the conventional steel wire cut pill cleaning agent, and having prominent technical benefit, economic benefit and environmental benefit.

The invention discloses a fireproof fiber board and relates to the technical field of fireproof material manufacture. The fireproof fiber board is prepared from the following raw materials in parts by weight: 100-120 parts of aluminum silicate fibers, 9-12 parts of silicon-aluminum sol, 12-15 parts of tetraethyl orthosilicate and 8-10 parts of additives. Compared with the prior art, the fireproof board is small in volume weight and consistent in surface and interior hardness, and can be processed into various products by use of mechanical equipment; the products processed from the fireproof fiber boards are high in dimensional accuracy.

The present invention relates to a cast iron electrode with low-carbon steel core wire, and is characterized by that the extrior of the low-carbon steel core wire is covered with a layer of coating which is composed of 30-34% of reduced iron powder, 13-21% of marble flour, 13-17% of ilmenite, 4-8% of ocher powder, 2-8% of clay, 1-4% of potassium ferrocyanide and other 12 kinds of raw materials. Said electrode can meet requirements for welding several cast iron mother materials.

The invention relates to the field of building construction. In order to solve the problem that the perpendicularity of a pile hole is low as a result of a locking hammer and an inclined hole, the invention provides a construction method for an impact-cone concrete pile. The stress face of an impact hammer is uniform, so that the perpendicularity of the pile hole is relatively high. The technicalscheme is as follows: the construction method comprises the following steps: surveying and setting out; positioning and drilling ahead; boulder blasting; impact holing, impacting again after hornstonebackfilling when a same horizontal section in the pile hole includes boulders and soil mass at the same time; mounting a steel reinforcement cage in the hole; and pouring concrete in the hole. The stress face of the impact hammer is uniformly distributed when the same horizontal section in the pile hole includes boulders and soil mass at the same time by backfilling the hornstones, the conditionthat the perpendicularity of the pile hole is reduced as the result of the locking hammer and the inclined hole is avoided, and the perpendicularity of the pile hole is ensured to further guarantee the quality of the impact-cone concrete pile.

A process of the grinding ball is disclosed in the invention. The square steel or the round steel is heated uniformly in the heating-furnace and forged into ellipse shape in the spacing mould by pneumatic hammer. Then the elliptical material is rolled to shape by the spiral roller and is treated in the hot water. The process is proper to producing grinding balls of all kinds of diameters.

The invention discloses a high-performance rubber guide wheel for a centerless grinding machine. The high-performance rubber guide wheel for the centerless grinding machine is prepared from, by weight, 56-70 parts of natural rubber, 20-45 parts of ethylene propylene diene monomer, 16-20 parts of styrene-butadiene rubber, 1.2-1.8 parts of zinc oxide, 0.7-1.5 parts of sulfur, 1-2 parts of dicumyl peroxide, 0.2-0.8 part of accelerant CBS, 0.8-1.5 parts of accelerant NOBS, 1-1.8 parts of accelerant PZ, 20-35 parts of modified epoxy resin, 15-35 parts of modified ferroferric oxide, 50-60 parts of white carbon black, 5-15 parts of nanometer glass beads, 0.5-2.5 parts of phenyltriethoxysilane, 0.8-1.6 parts of isopropyl dioleic(dioctylphosphate) titanate, 2-6 parts of caprolactam, 10-20 parts of nano ceramic microspheres, 4-10 parts of graphene, 5-15 parts of kaolin, 0.5-1.5 parts of stearic acid, 1-2 parts of pine tar, 1-2 parts of castor oil, 1-2 parts of coumarone and the like.

A cerium-containing leadless free-cutting zinc-copper-nickel alloy material comprises the chemical elements in percent by mass: 40-42% of Zn, 9-11% of Ni, 0.5-0.8% of Co, 0.15-0.18% of B, 0.05-0.08% of Mn, 0.03-0.05% of Ce, 0.05-0.08% of As, 0.08-0.1% of Hf, and the balance Cu. The zinc-copper-nickel alloy possesses the characteristics of excellent corrosion resistance and cold/hot processing formability originally owned by zinc-copper-nickel alloy; by adding B, Ce, Hf and other elements, the copper alloy is improved in cutting performance and electric conductivity, and the lead pollution problem is solved; and by reasonably controlling the processing temperature after casting and taking waste copper as a raw material, the hardness of the core part and the hardness of the surface are basically consistent, and the alloy quality is uniform. An employed refining agent is used for casting production, is capable of reducing the porosity degree of a casting by 1-2 degree and enabling the oxide inclusions to be around second grade, and helps to obviously improve the yield.

The invention discloses a welding material for quickly welding and repairing defects of large-sized QT500-7 nodular cast iron parts, comprising powder components including, by weight percent, from 30 to 35% of Fe2O3, from 25 to 30% of Al, from 1.4 to 1.6% of Na2CO3, from 4 to 6% of Na2B4O7, from 4 to 6% of CaF2, from 5 to 8% of CaO, from 0.5 to 1.5% of SiO2, from 5.0 to 7.0% of graphite, from 4.0 to 5.0% of 75Si-Fe, from 1.0 to 2.0% of 75Mn-Fe, from 0.5 to 2% of Ni, from 0.1 to 0.3% of Bi, from 1.0 to 2.0% of 60Si-Ca, from 0.3 to 0.8% of RE-Mg and from 7 to 10% of Q14 pig iron which are uniformly mixed. The total weight percent of the powder components is 100%. The invention further discloses a method for quickly welding and repairing the defects of the large-sized QT500-7 nodular cast iron parts by the aid of the welding material. By the aid of the material and the method, the QT500-7 nodular cast iron parts can be quickly welded and repaired at room temperature, probability of chills and cracks can be effectively, and ingredients, structures and colors of weld joints are basically consistent to those of the nodular cast iron parts.

The invention discloses an integral abrasion resistant anti-ageing comb-shaped carrier roller for a belt conveyer. The integral abrasion resistant anti-ageing comb-shaped carrier roller comprises a carrier roller shaft, a carrier roller cylinder and an outer ring, wherein bearings are mounted at the two ends of the carrier roller shaft; the bearings are wrapped with the carrier roller cylinder; the carrier roller cylinder rotates around the carrier roller shaft; the outer ring fixed outside the carrier roller cylinder is an integral rubber comb-shaped ring; sealing parts are arranged outside the bearings; crests of comb-shaped ripples of the integral rubber comb-shaped ring are circular horns; cross sections of the ripples are isosceles triangles; a plurality of groups of comb-shaped ripples are formed on the integral rubber comb-shaped ring; and each group has 2 to 5 ripples. According to the integral abrasion resistant anti-ageing comb-shaped carrier roller for the belt conveyer, the carrier roller shaft, the bearings, the sealing parts, the carrier roller cylinder and the integral rubber comb-shaped ring are manufactured or purchased according to size and precision requirements, and then, all the parts are assembled into the integral abrasion resistant anti-ageing comb-shaped carrier roller for the belt conveyer; the outer layer is an integral structure, so that the defect that once one external part is damaged, the other external parts are damaged is avoided; and the structure is reasonable, the stress is uniform, a belt is not damaged, the sealing performance is good, the integral abrasion resistant anti-ageing comb-shaped carrier roller is abrasion resistant, corrosion resistant and anti-ageing, the service life is long, the cost is low, and the changing and utilization are convenient.

The invention discloses a low-chromium alloy cast ball, and belongs to the technical field of wear resistant materials. The low-chromium alloy cast ball comprises, by mass, 2.4-3.0% of C, 0.6-1.6% of Mn, 0.8-1.6% of Cr, 0.5-0.8% of Si, 0.05-0.1% of Cu, 0.02% or below of S, 0.02% or below of P, 0.1-1.0% of Mo, and the balance Fe. The cost of the ball is low, the HRC of the ball is not lower than 50, the impact value of the ball is not lower than 1.6J/cm<2>, the life span of fatigue of falling balls is not lower than 11000, the core portion hardness of the ball is basically consistent with the surface hardness of the ball, and the toughness of the ball is good.

The invention relates to a wear-resistant zinc alloy material which contains the following chemical components in percentage by mass: 12.6-13.8% of aluminum, 3.6-3.8% of magnesium, 2.1-2.3% of silicon, 4.2-4.4% of nickel, 0.2-0.4% of cerium, 0.15-0.25% of Y, 2.0-2.3% of Mo, 0.02-0.04% of Ga, 0.12-0.18% of In and the balance of zinc. The crystal structure of the alloy is denatured, so that the alloy coating can not easily shed, the friction factor is lowered, and the wear resistance is enhanced. By adding the magnesium, aluminum, nickel, Mo and other elements, the strength of the zinc alloy is increased, and the wear resistance is enhanced. The alloy has favorable processability, and can be processed into bearing bushes, shaft sleeves, worm gears, sliders, screw nuts and other series antiwear products. When the refining agent is used for casting production, the porosity in the casting is lowered by 1-2 degrees, the oxide inclusion content is lowered by 2 levels or so, and the yield is obviously enhanced.