434results about How to "Reasonable ingredients" patented technology

Disclosed is a 600HB-grade wear resistant steel plate, comprising, by weight, 0.41 to 0.50% of C, 0.10 to 0.60% of Si, 0.20 to 1.20% of Mn, no more than 0.050% of P, no more than 0.030% of S, 0.01 to 1.50% of Cr, 0.01 to 1.00% of Mo, 0.01 to 1.50% of Ni, 0.001 to 0.10% of Ti, 0.001 to 0.10% of Al, 0.001 to 0.10% of RE, 0.01 to 1.00% of W, 0.0005 to 0.0040% of B, 0.001 to 0.010% of Ca, the balance Fe and unavoidable impurities. The 600HB-grade wear resistant steel plate provided in the invention has high hardness (no less than 600HB), good toughness and plasticity, high abrasion resistance and excellent processability and weldability; the microstructure is martensite or martensite and retained austenite. Therefore, the 600HB-grade wear resistant steel plate is extremely suitable for being used in high abrasion environment, especially for being used in vehicles or equipment which contact with such materials of high hardness as high strength ores, for example, a bucket, or the compartment of an electric wheel self-discharging truck for mining, etc.

The invention discloses a rare earth-contained heat-resistant magnesium alloy and a preparation method thereof, belongs to the technical field of magnesium alloy preparation. The heat-resistant magnesium alloy disclosed by the invention comprises the following materials by weight: 2 to 8 percent of Sm, 0.5 to 6 percent of Gd, 0.1 to 2 percent of Zn, 0.1 to 1.5 percent of Zr, and Mg and inevitable impurity elements in balancing amount, wherein the total weight of the impurity elements is equal to or smaller than 0.02 percent. By adding ally elements (Sm, Gd and Zn) to replace Y and Nd of WE series alloies, and adjusting corresponding heat treatment processes to ensure that the prepared magnesium alloy has excellent indoor temperature intensity, high-temperature strength and plasticity, the indoor temperature intensity, high-temperature strength and plasticity of the magnesium alloy prepared according to the preparation method are more excellent than those of the conventional WE series commercial magnesium alloies; the preparation method of the magnesium alloy prepared according to the preparation method is lower than that of the conventional WE series commercial magnesium alloies. The process is simple; industrialized application is facilitated.

The invention discloses a steel plate with yield strength of 960MPa, which comprises the following chemical components in weight percent: 0.07-0.11 percent of C, 0.10-0.50 percent of Si, 1.60-2.20 percent of Mn, not greater than 0.015 percent of P, not greater than 0.003 percent of S, 0.10-0.35 percent of Cr, 0.20-0.50 percent of Mo, 0.02-0.06 percent of Nb, 0.02-0.06 percent of V, 0.003-0.04 percent of Ti, 0.02-0.07 percent of Al, 0.0006-0.0025 percent of B and the balance of Fe and other inevitable impurities. The steel plate with the yield strength of 960MPa also meets the following relational expressions: C+Mn is not less than 1.853Si+2.078Cr+3.112Mo-1298.532B but is not greater than 5.891Si+4.115Cr+4.797Mo-398.532B, and ln(AEQ) is not less than 2.08 but is not greater than 3.41. The invention also discloses a manufacturing method for the steel plate. The tensile strength of the obtained steel plate is not less than 980MPa, the Charpy impact power Akv (-40 DEG C) is not less than 80J, and the carbon equivalent (CEV) is not greater than 0.58 percent. The steel plate is excellent in welding property.

The invention relates to a low-sugar fruity mint tabletting candy, comprising the following components: sorbitol, citric acid, fruit powder, fruit essence, magnesium stearate, raspberry fruit powder, malic acid, refrigerant, mentha arvensis oil and natural menthol, wherein the fruit powder comprises lemon powder, apple powder, grapefruit powder, mango powder, strawberry powder and blueberry powder; the fruit essence comprises lemon essence, rose bud essence, apple essence, mango essence, strawberry essence, brown sugar essence, vanilla essence, passion fruit essence, grapefruit essence, blueberry essence, raspberry essence and vatica astrotricha essence. The low-sugar fruity mint tabletting candy prepared by the method disclosed by the invention is a daily healthy buccal tablet which is good in taste, very low in sugar content, and applicable to mass people, can relieve dental ulcer, clear and nourish a throat and remove fatigue, and has the effects of refreshing breath, relaxing the mind and promoting oral health after being eaten.

The invention discloses an HB400-grade wear-resisting steel plate and a production method thereof. The steel plate comprises the following chemical components in percentage by weight: C 0.05-0.15wt%, Si 0.4-1.4wt%, Mn 0.5-2.0wt%, P <0.012wt%, S <0.003wt%, Mo 0-0.5%, Nb 0.01-0.08%, Cu 0.20-1.0%, Co 0-1.0%, B 0.0010-0.0025wt%, Al 0.02-0.04wt%, Ti 0.004-0.030wt%, and the balance of Fe and inevitable impurities, wherein the content of Mo and Nb needs to satisfy the condition that the Mo+Nb is not less than 0.023C+0.059Ti+1.71B and not more than 2.574C+0.62Mn+10.36Ti +2.11B. The invention reduces production cost by adding some cheap alloy elements; and when the value of carbon equivalent Ceq is not more than 0.45, the HB400-grade wear-resisting steel plate has good welding performance.

The invention relates to an antibacterial tanshinone extract extracted from Salvia spp. roots, a preparation method thereof, application of the antibacterial tanshinone extract and products of the antibacterial tanshinone extract. The extract contains cryptotanshinone, dihydro-tanshinone, tanshinone I and tanshinone IIA, wherein the total weight content of the four compounds is 40 to 99 percent of the total weight content of the extract; the weight content of the cryptotanshinone is 50 to 95 percent of the total weight of the four compounds; the weight content of the dihydro-tanshinone is 5 to 30 percent of the total weight of the four compounds; the weight content of the tanshinone I is 0 to 20 percent of the total weight of the four compounds; and the weight content of the tanshinone IIA is 0 to 40 percent of the total weight of the four compounds. The preparation method comprises the steps of diacolation extraction and purification for two times. The extract is used for preparing antibacterial medicines or other products. The tanshinone extract obtained has high purity, more reasonable proportions of various compositions, and can exert better clinic effect.

The invention discloses a kit for detecting a plurality of mosquito borne pathogens and a detection method thereof. The plurality of mosquito-borne infectious pathogens are detected by using multiplex polymerase chain reaction (PCR) combined with a liquid chip, and a yellow fever virus (YFV), dengue fever viruses (DV) I-IV type, epidemic encephalitis B (japanese encephalitis) virus (JEV), plasmodium (Plasmodium), (including plasmodium vivax (PV), plasmodium falciparum (PF), plasmodium malariae (PM), plasmodium ovale (PO)), a west nile virus (MNV) and a chikungunya virus (CHIKV) can be detected in parallel one time. The kit has the advantages of being large in flux, high in specificity and sensitivity, stable in result, good in repeatability, simple to operate and fast in detection speed.

The present invention provides a high-hardness wear-resistant steel plate and a manufacturing method thereof. The high-hardness wear-resistant steel plate comprises the following chemical compositions (wt%) of 0.60-0.75% of C, 0.10-0.40% of Si, 0.60-1.30% of Mn, 0-0.020% of P, 0-0.010% of S, 0.10-0.50% of Cu, 0.10-0.50% of Ni, 0.0030-0.0100% of N, and the balance being Fe and inevitable impurities. The manufacturing method comprises the following steps of smelting, casting, hot rolling, annealing, pipe making, welding, quenching and tempering and other steps. The wear-resistant steel plate obtained by the above compositions and through the above process has high hardness and high wear resistance, with typical Rockwell hardness of HRC 62 to 66, and is suitable for easy-to-wear parts in various mechanical equipments, such as concrete pump delivery pipes.

The invention relates to a maca teabag and a preparation method thereof. The maca teabag is prepared from the raw materials of 10-15 parts of maca, 5-8 parts of raspberries, 3-6 parts of barley, 2-4 parts of osmanthus fragrans and 1-3 part(s) of Pu-Er ripe tea through the steps of raw material selecting, smashing, screening with a vibrating screen, weighting, component mixing and final subpackage. The maca teabag is reasonable in components and ratio design, and rich in nutrition, and the effects of all components are supplementary to one another; the preparation method is simple and convenient, and the cost is low; the maca teabag is prepared from natural components completely, so that original taste and flavour are kept, the tea soup of the maca teabag is brownish yellow, strong in wheat flavor and flower fragrance, and mellow in taste; the dissolution rate is high, extract is multiple, brewing resistance is achieved, maca teabag is carried and drunk conveniently by people, and a new beverage with the efficacities of tonifying kidney, building body and resisting fatigue is provided.

The invention discloses high-toughness mining chain steel and a manufacturing method thereof. The high-toughness mining chain steel comprises the following components in percentage by weight: 0.20-0.28% of C, 0.01-0.40% of Si, 0.50-1.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.30-2.00% of Cr, 0.50-2.00% of Ni, 0.10-0.80% of Mo, 0.01-0.30% of Cu, 0.01-0.05% of Al, 0.001-0.10% of Nb, 0.001-0.10% of V, less than or equal to 0.00018% of H, less than or equal to 0.0150% of N, less than or equal to 0.0020% of O and the balance of Fe and inevitable impurities. The manufacturing process comprises the working procedures of smelting, refining, vacuum treatment, casting, heating, forging or rolling, quenching and tempering heat treatment and the like. The chain steel has high strength and good impact toughness, ductility and percentage reduction of area, can resist stress corrosion cracking, has good weather resistance, wear resistance and fatigue resistance, and can be used for engineering machinery, ocean engineering and other occasions needing high-strength and high-toughness steel.

The invention relates to the technical field of hot-rolled ribbed steel bars, and discloses steel for a 635 MPa level high-strength hot-rolled steel bar. The steel is prepared from, by weight, 0.22-0.30% of C, 0.50-0.80% of Si, 1.40-1.60% of Mn, not larger than 0.025% of P, not larger than 0.025% of S, 0.015-0.035% of Nb, 0.105-0.145% of V, 0.15-0.35% of Cr, 0.018-0.025% of N and the balance Fe. According to the steel for the 635 MPa level high-strength hot-rolled steel bar and a machining method thereof, by adopting C, C is a cheap element, the strength of the steel can be remarkably improved, the extension performance of the steel can be lowered, meanwhile, the cold brittleness and aging sensitivity of the steel are improved, the integrated ingredients are reasonable, the comprehensive performance of the whole steel is improved, the stability of the steel performance is enhanced, the overall performance of the steel on the aspects of yield strength, tensile strength, the high yield ratio, the percentage elongation after fracture, the total elongation percentage under the maximum force and the like is good, meanwhile, the steel metallographic structure is ferrite+pearlite, the granularity is 11.5, the good fatigue resistance is achieved, the steel is suitable for large-scale industrial production, and benefits are remarkable.