37results about How to "Reasonable hardness" patented technology

The invention discloses a submerged arc welding flux for welding ultra-low temperature high manganese steel. The flux is prepared by the following components, by weight: 3-6 parts of SiO2, 30-50 partsof MgO, 30-40 parts of Al2O3, 10-20 parts of CaF2, 3-10 parts of TiO2, more than 0 and not more than 3.0 parts of Fe2O3, more than 0 and not more than 0.020 part of S and more than 0 and not more than 0.015 part of P. Compared with the prior art, the flux has the advantages of good welding processability, excellent slag removal, beautiful shape and better mechanical performance. The welding wireand flux of the invention can replace a nickel-based base material and welding material when welding ultra-low temperature high manganese having a manganese content of 13% or more and can meet the ultra-low temperature requirements of -196 DEG C.

The present invention provides two-component polyurethane compositions that are substantially free of VOCs and comprising, as one component, polyisocyanate compositions and, as a second component, a polyol which is chosen from a cycloaliphatic diol or polyol having a molecular weight of from 100 to 500 and containing one or more 4 to 7 member aliphatic ring and an oligomeric diol or polyol comprising the condensation reaction product of from 30 wt. % to 78 wt. %, based on the total weight of reactants used to make the oligomer, and an acrylic or vinyl emulsion polymer.

The invention relates to the field of silicone sheets, and specifically provides a thermally conductive silicone sheet as well as a preparation method and application thereof, and a thermally conductive heating silicone sheet as well as a preparation method and application thereof. The thermally conductive silicone sheet is prepared from the following raw materials in parts by mass: 10-100 parts of silicone rubber, 300-1900 parts of a thermal conductive agent, 0.5-100 parts of a flame retardant agent, 0.3-6 parts of a reinforcing agent and 3-50 parts of a crosslinking agent, wherein the weightaverage molecular weight of the silicone rubber is 70-900,000. The thermally conductive silicone sheet has relatively high coefficient of thermal conductivity, reasonable hardness and relatively goodhigh temperature resistance, wherein the coefficient of thermal conductivity can reach 1-5 w/(m.k), and the hardness Shore OO is 40-80, so that the scope of application is wider.

The present invention relates to a licking brick for ruminants and specifically discloses a parasite expelling and stomach strengthening compound premixed feed licking brick used for fattening cattle. The compound premixed feed licking brick consists of edible made salt, haws, cellulase, ivermectin, albendazole, cement, bentonite, ammonium chloride, baking soda, calcium formate, a flavoring agent, calcium hydrogen phosphate, ferrous sulfate, copper sulfate, zinc sulfate, magnesium sulfate, manganese sulfate, sodium selenite, cobalt chloride, calcium iodate, rumensin, compound multi-vitamins and yeast powder. A density of the licking bricks is 1.8-2.2 g/cm<3>. The compound premixed feed licking brick has the following advantages: 1) the provided compound premixed feed licking brick is particularly suitable for licking of the fattening cattle, strengthens stomach, at the same time regulates body endocrine and gastrointestinal functions, promotes toxin removing and diuresis causing, effectively prevents food stagnation in rumen, gastroenteritis diseases, parasitic diseases, etc., and plays double effects of epidemic prevention and health care; and 2) the licking brick aims at nutrition needs and licking characteristics of the fattening cattle, is scientific in design and formula, rich in nutrition, appropriate in food intake, and reasonable in hardness, and can effectively improve production performances of the fattening cattle.

The invention discloses a technology for producing a hard alloy woodworking blade by means of fine-particle return scraps. The technology comprises the following steps that S1, the fine-particle return scraps produced in the bar production process are recycled and dewaxed; S2, the return scrap treated in the step S1 are added into a rotary mill with hard alloy serving as a grinding body; and S3, spray particles are formed through a precision press and sintered in a pressure sintering furnace. The dewaxing technology is adjusted, so that it is guaranteed that dewaxing is carried out completely, and the property of the fine-particle return scraps is not influenced; the proper ball milling carbon addition technology is determined; by means of testing of the forming performance of various forming agents, a pressing test is carried out, the proper forming agents are screened out, and it is ensured that the pressing performance of a hard alloy woodworking cutter produced through the fine-particle return scraps is stable, and the forming agents are reasonable in ratio; and the wear resistance and heat resisting strength of the hard alloy woodworking blade manufactured through the technology are remarkably improved, hardness is reasonable, and the manufacturing cost is greatly reduced.

The invention discloses a high-hardness and low-carbon medium-cadmium wear-resisting steel ball. The high-hardness and low-carbon medium-cadmium wear-resisting steel ball comprises the following components in percentage by weight: 1.9-2.8% of C, 1.4-2.9% of Si, 0.6-0.8% of Mn, 3.6-5.4% of Cr, 0.6-1.2% of Cu, 0.1-0.3% of Mo, 0.1-0.3% of Re, less than 0.04% of S, less than 0.04% of P, and the balance Fe and inevitable impurities. The invention also discloses a preparation method of the high-hardness and low-carbon medium-cadmium wear-resisting steel ball. The low-cadmium wear-resisting steel ball is high in hardness and high in impact toughness.

The present invention relates to a lick brick for ruminants and particularly discloses a special compound premixed feed lick brick for dairy cows in a perinatal period. The special compound premixed feed lick brick for the dairy cows in the perinatal period comprises edible salt, cement, bentonite, calcium propionate, bacitracin zinc, baking soda, calcium formate, calcium carbonate, calcium hydrogen phosphate, a flavoring agent, glycine iron, copper glycinate, zinc glycinate, magnesium oxide, manganese glycinate, yeast selenium, cobalt chloride, calcium iodate, rumensin and compound multiple vitamins. A density of the lick brick is 1.7-1.9 g/cm<3>. According to nutritional requirements and licking characteristics of the dairy cows in the perinatal period, the compound premixed feed lick brick suitable for the dairy cows in the perinatal period is scientific in designs and formulas, rich in nutrition, adequate in feed intake and appropriate in hardness, and can effectively improve a production performance of the dairy cows in the perinatal period. Experiments show that a long-term licking of the lick brick can effectively reduce an incidence of trace element deficiency in the dairy cows in the perinatal period and can significantly improve milk production amount and quality.

The invention discloses a multi-rigidity sole and a sole die. The sole die comprises a sole body die and a core die, the upper surface of the core die is provided with a first toe joint protrusion which is arranged horizontally and a first inner vertical protrusion which is arranged vertically, and the sole is formed through lamination, clamping and foaming of the core die and the sole body die. Compared with the prior art, the multi-rigidity sole and the sole die have the advantages that the toe joint protrusion and the first inner vertical protrusion of the upper surface of the core die aredesigned according to human engineering, a foamed sole core accords with the structure characteristics of the feet of the human body, the wrapping performance of shoes can be improved, and the feet are better protected. In addition, the rigidity of the core is lower than that of a shoe body, and the wearing comfort and stability of supporting the feet are guaranteed.

The invention discloses an aluminum alloy for decoration and a production process thereof and relates to the field of building materials. The aluminum alloy contains, by mass, 1.5-4.5% of Fe, 0.6-1.0% of Cu, 1.0-3.0% of Co, 0.2-0.5% of Sb, 0.5-1.0% of Sc, 0.5-0.9% of Zn, 0.3-0.7% of Rb, 0.4-0.8% of Si, 0.5-0.8% of Mo, 0.2-0.4% of Pb, 0.15-0.3% of Mn and the balance of aluminum and unavoidable impurities. By adopting the technical scheme, production efficiency is high, corrosion resistance of the aluminum alloy is guaranteed, glossiness of the surface of an aluminum alloy section is improved, the surface of the aluminum alloy section is free of cracks, peeling and air bubbles, and the aluminum alloy section is ensured to have reasonable tensility, strength and hardness.

The invention relates to a preparation method of an adhesive for wafer cutting. The preparation method comprises the following steps of: (1) preparing a component A; (2) preparing a component B; (3) weighing the component A and the component B in parts by weight, sufficiently and uniformly mixing, then uniformly carrying out knife coating on the surfaces of a crystal bar and a glass plate, tightly pressing and fixing on the glass plate, standing for 1 hour, then moving the crystal bar, sufficiently solidifying for 4 hours, and then cutting on a machine to obtain a finished product. The adhesive has the characteristics of easiness for debonding, high hardness, good toughness and the like, is suitable for the cutting of a wafer and can be used for reducing the wafer drop and edge brightening and enhancing the superior product rate.

The invention relates to an adhesive for cutting wafer. The adhesive comprises a component A and a component B at a weight part ratio of (25-40) to (17-31), wherein the component A comprises the following components in parts by weight: 80-100 parts of epoxy resin, 40-50 parts of polyvinyl alcohol, 15-30 parts of sodium hydrogen sulfite, 10-25 parts of precipitated barium sulphate, 1-5 parts of crylic acid, 2-10 parts of ethanol and 1.5-7.5 parts of 2-ethylhexyl epoxystearate; and the component B comprises the following components in parts by weight: 40-50 parts of nitrile rubber, 10-12.5 parts of butyl acrylate, 1-5 parts of a plasticizer and 0.1-2 parts of a coupling reagent. The adhesive has the characteristics of being easy to degum, relatively high in hardness and good in tenacity, and is applicable to cutting thin wafers; and meanwhile, a chip shell and a bright side are reduced, so that the good-grade rate is improved.

The invention discloses an inspection well lid used for a rainwater and sewage integrated pipeline. The inspection well lid used for the rainwater and sewage integrated pipeline comprises an inspection well lid body (1), a bearing ring body (2), a light-reflecting loop (3) and a sealing ring (4). The sealing ring is arranged on the inner side wall of the bearing ring body. The inspection well lidbody is embedded in the sealing ring and is matched with the bearing ring body. An annular groove (5) is formed in the upper end face of the inspection well lid body along the edge of the inspection well lid body. An adhesive layer (6) is arranged in the annular groove. The light-reflecting loop is arranged in the annular groove through the adhesive layer. A protective steel wire mesh (7) is embedded above the annular groove, and the upper surface of the protective steel wire mesh is flush with the upper end face of the inspection well lid body. Floor drain mounting holes (8) are formed in theinspection well lid body, and floor drains (8-1) matched with the floor drain mounting holes are mounted in the floor drain mounting holes. Longitudinal reinforcing ribs (9) and horizontal reinforcing ribs (10) are arranged on the lower end face of the inspection well lid body. The inspection well lid used for the rainwater and sewage integrated pipeline is reasonable in structural design.

The invention discloses aluminum alloy for decoration and a production process thereof, and relates to the field of building materials. The aluminum alloy for decoration comprises, by mass, 1.5-4.5% of Fe, 0.6-1.0% of Cu, 1.0-3.0% of Co, 0.2-0.5% of Sb, 0.5-1.0% of Sc, 0.5-0.9% of Zn, 0.3-0.7% of Rb, 0.4-0.8% of Si, 0.5-0.8% of Mo, 0.2-0.4% of Pb, 0.15-0.3% of Mn, and the balance aluminum and inevitable impurities. By the adoption of the technical scheme provided by the invention, the production efficiency is high, the corrosion resistance of the aluminum alloy is guaranteed, meanwhile, the surface glossiness of aluminum alloy sections is improved, the surfaces of the aluminum alloy sections are free of cracks, peeling and bubbles, and the aluminum alloy sections have reasonable extensibility, strength and hardness.