6754 results about "Impurity" patented technology

The invention discloses a steel wire rod for a 2400-2460 MPa grade stress corrosion resistant prestressed steel strand, the steel strand and a production method. The steel wire rod comprises the following chemical components in percentage by weight: 0.90-0.97% of C, 0.6-1.2% of Si, 0.2-0.8% of Mn, 0.15-0.45% of Cr, 0.02-0.05% of V, 0.01-0.05% of Nb, less than 0.30% of Ni, less than 0.30% of Cu, less than 0.30% of Mo, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.004% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. By optimizing the chemical components and the production process of the wire rod, the strength of the prepared steel strand meets 2400-2460 MPa, the minimum stress corrosion value is 2.5 hours, the median value is 5 hours, and the stress corrosion resistance is obviously superior to that of an existing steel strand.

The invention discloses a steel wire rod for a 2300-2360 MPa grade stress corrosion resistant steel strand, the steel strand and a preparation method. The steel wire rod comprises the following chemical components in percentage by mass: 0.85-0.91% of C, 0.3-1.0% of Si, 0.2-0.8% of Mn, 0.15-0.45% of Cr, 0.02-0.05% of V, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.004% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. The steel wire rod has excellent strength and plasticity, the ultrahigh strength of 2300 MPa or above can be obtained through drawing with a small area reduction rate, surface damage and internal defects of the steel wire rod during subsequent drawing machining are reduced, and the stress corrosion index of the steel strand is improved.

Described are storage and dispensing systems and related methods, for the storage and selective dispensing germane a reagent gas from a vessel in which the reagent gas is held in sorptive relationship to a solid adsorbent medium at an interior of a storage vessel and wherein the methods and dispensing systems provide dispensing of the reagent gas from the storage vessel with a reduced level of atmospheric impurities contained in the dispensed reagent gas.

The invention relates to the technical field of aluminum alloy, in particular to a high-strength corrosion-resistant aluminum alloy material and a preparation method and application thereof.The high-strength corrosion-resistant aluminum alloy material comprises, by weight, 4.5%-8.5% of Mg, 3.5%-5.5% of Zn, 0.8%-1.6% of Cu, at least two of the following elements with the total content not larger than 0.5%: 0.05%-0.15% of Mn, 0.05%-0.15% of Cr, 0.05%-0.12% of Ti, 0.06%-0.16% of Sc, 0.08%-0.14% of Er, 0.06%-0.12% of Zr and the balance Al and inevitable impurities. The total content of the impurities does not exceed 0.4%, and the balance is Al. Wherein the mass ratio of Mg to Zn is 1.1-2.0, when Sc and Zr exist at the same time, (Sc + Zr) is larger than or equal to 0.15% and smaller than or equal to 0.2%, when Er and Zr exist at the same time, (Er + Zr) is larger than or equal to 0.16% and smaller than or equal to 0.24%, and each impurity element is smaller than or equal to 0.15%. The exfoliation corrosion, stress corrosion and salt spray corrosion performance of the alloy is greatly improved by controlling the content and mass ratio of all the elements, and the exfoliation corrosion performance of the alloy is not lower than the P level; in a slow strain rate tensile test in saline water, the attenuation proportion of the elongation is not greater than 9% compared with that of an inert medium, and good stress corrosion cracking resistance is shown; in a 960h neutral salt spray corrosion test, the average corrosion rate is not greater than 0.1 g / (m < 2 >. H).

The invention discloses a copper alloy pipe and a preparation method and application thereof, and the copper alloy pipe comprises the following components in percentage by mass: 0.01%-0.80% of Sn, 0.005%-0.05% of P, 0.01%-0.10% of Zr, 0.001%-0.01% of B, 0.001%-0.01% of Mn and the balance of Cu and inevitable impurities. Wherein the copper alloy pipe contains MnZr and BMn compound particles, the number of the MnZr compound particles on the cross section of the copper alloy pipe is 0.005-0.15 / mu m < 2 >, and the number of the BMn compound particles on the cross section of the copper alloy pipe is 0.005-0.2 / mu m < 2 >. By adding Zr, B and Mn and controlling the content of Zr, B and Mn, the preparation process and the like, the number and uniformity of MnZr and MnB compounds are regulated and controlled, and the tensile strength, ductility, corrosion resistance, bending, flaring, welding, pressure resistance and other machining performance of the copper alloy pipe are improved; and the prepared copper alloy pipe fully meets the application requirements of heat conduction pipes of air conditioner heat exchangers, air conditioner indoor and outdoor unit connecting piping and the like.

The invention discloses a steel wire rod for a 2500-2560 MPa grade stress corrosion resistant prestressed steel strand, the steel strand and a production method. The steel wire rod comprises the following chemical components in percentage by mass: 0.95-1.02% of C, 0.8-1.5% of Si, 0.5-1.0% of Mn, 0.25-0.45% of Cr, 0.02-0.08% of V, 0.01-0.05% of Nb, less than 0.30% of Ni, less than 0.30% of Cu, less than 0.30% of Mo, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.004% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. By optimizing the chemical components and the production process and refining the microscopic structure, the steel strand prepared from the steel wire rod has high tensile strength, the minimum stress corrosion value is 2.5 hours, the median value is more than 5 hours, and the steel strand shows excellent stress corrosion resistance.

A purification method for purification and impurity removal of metal rubidium and cesium performs purification and impurity removal treatment on metal rubidium and cesium through external introduction of elements, and specifically comprises the following process steps and conditions: (1) firstly, putting metal lead particles into a porous and liftable stainless steel mesh; secondly, transferring a penicillin bottle in which the primary metal rubidium / cesium liquid is sealed in a vacuum manner into a glove box protected by argon, opening a penicillin bottle cap to transfer the primary metal rubidium / cesium liquid into a reaction tank, and then putting the reaction tank and a stainless steel mesh into a well type resistance vacuum furnace together to finish charging operation; and (2) heating the reaction tank after the charging operation by using a resistance heater, raising the temperature of the furnace to 50-320 DEG C, keeping the temperature for 2-10 hours, and then carrying out solid-liquid separation to obtain the high-purity metal rubidium / cesium, so that Li / Na impurities can be effectively removed, a high-purity metal rubidium / cesium product is prepared, and the production cost is reduced. And the method has the advantages of short process flow, low energy consumption, low reaction temperature, simplicity and convenience in equipment operation, lower manufacturing cost, variable specification, investment saving, environmental pollution reduction, raw material cost reduction and the like.

The invention discloses a 340MPa grade P-containing hot-dip galvanized iron alloy high-strength IF steel, the chemical composition of which is as follows by weight: C: ≤0.003%, Si: ≤0.03%, Mn: 0.35-0.65%, P: 0.03-0.075%, S≤0.010%, Als: 0.020-0.045%, Nb: 0.008-0.015%, Ti: 0.02-0.03%, B: 0.0004-0.0010%, N≤0.0035%, and the remainder is Fe and unavoidable impurities; The elements also meet the following restrictions: calculated according to the corresponding weight percentage of each element, 10C+3N+2S≤Ti+2Nb≤12C+3N+2S, 60B≤P≤80B; the present invention adds P element to IF steel, and through composition and process optimization control, obtains a P-containing hot-dip galvanized iron alloy high-strength IF steel with a yield strength of 180-320 MPa, a tensile strength of 340-440 MPa, an elongation of 35-46%, a value (average plastic strain ratio) ≥1.8, high surface quality, high formability, and good cold brittleness.

The high-steel-grade low-cost hot-rolled coil plate comprises the following chemical components: 0.040 to 0.065 percent of C, 0.20 to 0.35 percent of Si, 1.48 to 1.75 percent of Mn, less than or equal to 0.02 percent of P, less than or equal to 0.003 percent of S, 0.012 to 0.025 percent of Ti, 0.035 to 0.055 percent of Nb, 0.005 to 0.008 percent of RE, 0.15 to 0.20 percent of Cr, 0.0005 to 0.0020 percent of B, 0.002 to 0.004 percent of Mg, 0.025 to 0.050 percent of Als, less than or equal to 0.003 percent of Ca, less than or equal to 0.008 percent of N and the balance of Fe and inevitable impurities. The technological process comprises the steps of smelting, slab continuous casting, slab heating, rolling, cooling and coiling. Rt0.5 of the steel is 580-660 MPa, Rm is 650-750 MPa, A50 mm is larger than or equal to 28%, Rt0.5 / Rm is smaller than or equal to 0.90, the impact energy mean value Akv at the temperature of-40 DEG C is larger than or equal to 200 J, the drop weight DWTT mean value at the temperature of-20 DEG C is larger than or equal to 90%, the hardness value HV10 is smaller than or equal to 220, and the cold bending performance is qualified. The product provided by the invention has high strength and toughness and good welding performance, so that the product is more suitable for various complex and extreme service environments, and has higher safety in pipeline engineering.

The invention discloses a method for testing the content of platinum in a platinum compound solution, and belongs to the technical field of analytical testing. According to the test method, an ammonium chloride precipitation gravimetric method is replaced by a hydrogen reduction gravimetric method, platinum ions in a platinum compound solution are reduced into elemental platinum in a hydrogen reduction mode, and the content of platinum in the solution is calculated by weighing the weight of a reduced platinum sinter and subtracting the content of impurity elements in the platinum sinter at the same time. According to the method, the platinum content in the platinum compound solution can be accurately and quantitatively analyzed, the operation process is simple, good repeatability is achieved, the range of multiple analysis results of the same sample is smaller than or equal to 0.05% and is far lower than the repeatability limit 0.2% of a national standard method, the analysis accuracy is guaranteed, and meanwhile the analysis efficiency is greatly improved.

The invention provides a production method of 440MPa-grade normalized high-strength structural steel for a ship body, and belongs to the field of ship body structural steel manufacturing, the production process route of the steel comprises smelting, die casting, rolling, rapid cooling, finishing, normalizing and tempering, the thickness of a produced steel plate is 8-20mm, and the steel comprises the following chemical components in percentage by mass: 0.06-0.10% of C; si: less than or equal to 0.40%; mn is equal to 0.90%-1.20%; less than or equal to 0.015% of P; s: < = 0.005%; the ratio of Ni to Cr is (0.90%-1.30%): (0.50%-0.65%); v is equal to 0.030 percent to 0.050 percent; cu is equal to 0.15%-0.35%; n is less than or equal to 0.0040%, and the balance is Fe and inevitable impurities. The microstructure of the steel is a bainite tempered structure and ferrite, and the average grain size of the ferrite is smaller than or equal to 10 micrometers. The yield strength of the steel is larger than or equal to 440 MPa, the tensile strength is larger than or equal to 600 MPa, the yield ratio is smaller than or equal to 0.75, the impact absorbing energy at the temperature of 60 DEG C below zero is larger than or equal to 200 J, the ductile-brittle transition temperature is not higher than 80 DEG C below zero, and a product has good corrosion resistance.

The invention discloses a method and a device for preparing high-purity molybdenum hexafluoride. The preparation method comprises the following steps: (1) preheating nitrogen trifluoride; (2) carrying out contact reaction on nitrogen trifluoride and metal molybdenum in the reactor; (3) settling the gas product through a settling tank to remove particulate matters, and collecting crude molybdenum hexafluoride gas; (4) introducing the molybdenum hexafluoride crude gas into an adsorption tower, and adsorbing to remove hydrogen fluoride; and (5) collecting a molybdenum hexafluoride finished product, and repeatedly heating, freezing and vacuumizing to remove low-boiling-point impurities to obtain the molybdenum hexafluoride product with the purity not lower than 99.996%. A nitrogen trifluoride steel cylinder, a mass flow controller, a nitrogen trifluoride preheater, a first reactor, a second reactor, a third reactor, a settling tank, a crude product storage tank, an adsorption tower and a finished product storage tank are sequentially connected, wherein the third reactor is formed by connecting three reaction containers in series; the adsorption tower is formed by connecting two stages of towers in series, and the adsorption tower is filled with sodium fluoride.

This ferritic-austenitic duplex stainless steel material has a composition containing, in terms of mass, at most 0.100% of C, 0.05-1.50% of Si, 0.05-2.00% of Mn, 4.00-9.00% of Ni, at most 0.050% of P, at most 0.0040% of S, 23.0-30.0% of Cr, 0.100-0.250% of N, 0.01-2.00% of Cu, 0.50-2.50% of Mo, at most 0.100% of Al, and at most 0.200% of Nb, with the remainder consisting of Fe and impurities, wherein: a DF value represented by expression (1) of DF=7.2(Cr+0.8Mo+0.78Si)-8.9(Ni+0.03Mn+0.72Cu+22C+21N)-44.9 (in the expression, the element symbols represent the contents (mass%) of the respective elements) is 45.0-70.0; and an austenite phase satisfies relational expression (2) of (0.8Cr)2+2Ni+7Mo+30Cu+30N≥340 (in the expression, the element symbols represent the contents (mass%) of the respective elements).

The invention discloses an alloy for a 2230 MPa-grade high-corrosion-resistance steel strand, a wire rod, the steel strand and a method, and the alloy comprises the following components in percentage by mass: 0.89-0.93% of C, 1.20-1.40% of Si, 0.50-0.70% of Mn, 0.30-0.40% of Cr, 0.01-0.04% of V, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.0040% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. By optimizing the chemical component design and controlling the production process, the homogeneity of the steel is improved, the homogeneity of the wire rod is improved, the purity is improved, meanwhile, surface damage and internal defects during steel wire drawing machining are reduced, and therefore the stress corrosion index of the steel strand is improved.

The invention discloses a low-crystalline-silicon-dioxide-content environment-friendly ceramic rock plate with a hydrophobic self-cleaning function and a manufacturing method, and the ceramic rock plate comprises a green body layer, a decorative layer arranged on the upper surface of the green body layer and a hydrophobic self-cleaning coating arranged on the upper surface of the decorative layer, the green body layer comprises the following chemical components in percentage by weight: 58%-65% of SiO2 (T), 22%-28.5% of Al2O3, 0-3% of Fe2O3, 0.5%-7% of CaO, 0.5%-5% of MgO, 1.5%-5% of K2O, 0.35%-3% of Na2O and the balance of impurities, the content of crystalline silicon dioxide SiO2 (Cp) in the phase composition of the green body layer is less than or equal to 10% in percentage by weight, and the static water contact angle of the hydrophobic self-cleaning coating is greater than 90 degrees. The prepared ceramic rock plate product is low in crystalline silicon dioxide content, good in toughness and high in strength, so that the processability is good, little crystalline silicon dioxide dust is generated in the processing process, the product has the hydrophobic self-cleaning function, and the hydrophobic self-cleaning coating is high in firmness, high in durability, good in pollution resistance and free of substances such as fluorine harmful to human bodies and the environment.

The invention discloses a high-toughness hot-rolled pickled steel plate for a bimetal band saw back and a manufacturing method of the high-toughness hot-rolled pickled steel plate. The technical problems that an existing steel plate for the bimetal band saw back is low in toughness and high in manufacturing cost are mainly solved. According to the technical scheme, the high-toughness hot-rolled pickled steel plate for the saw back of the double-metal band saw comprises the following chemical components in percentage by weight: 0.28%-0.33% of C, 0.20%-0.40% of Si, 0.90%-1.10% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 3.8%-4.0% of Cr, 1.2%-1.4% of Mo, 0.6%-0.8% of Ni, 0.3%-0.4% of V, 0.05%-0.08% of Al, 0.01%-0.03% of Nb, less than or equal to 0.0060% of N, less than or equal to 0.0002% of H, less than or equal to 0.0012% of O and the balance of Fe and inevitable impurities.

The invention discloses 700Mpa-grade hot-rolled wheel steel and a preparation method thereof, and belongs to the technical field of metallurgy. The steel for the wheel comprises the following chemical components in percentage by mass: less than or equal to 0.1% of C, 0.05-0.10% of Si, less than or equal to 1.65% of Mn, less than 0.015% of P, less than 0.005% of S, less than 0.060% of Nb, less than 0.020% of Ti, less than 0.03% of Cr, less than 0.045% of A1s, less than 0.005% of N, less than 0.003% of O and the balance of iron and inevitable impurities. The production method comprises the procedures of molten iron pretreatment, converter smelting, LF refining, RH refining, slab continuous casting, heating, rolling, laminar cooling and coiling. Under the condition that expensive Mo element is not added, through reasonable component design and a controlled rolling and controlled cooling process, the yield strength of the wheel steel is larger than or equal to 500 MPa, the tensile strength is larger than or equal to 680 MPa, the ductility is larger than 18%, and the wheel steel has good welding performance and machining performance.

The invention belongs to the field of rail manufacturing, and specifically discloses a manufacturing method for improving the low temperature fracture resistance and contact fatigue damage resistance of rails and the rails obtained thereby. The method comprises the following steps: converter smelting, LF refining, RH vacuum treatment, billet continuous casting, billet cleaning and cooling, billet heating, rail rolling, online heat treatment and post-treatment, wherein: during the converter smelting process, bottom blowing of nitrogen is performed; after the RH vacuum treatment, iron-calcium wire feeding treatment is performed. Calculated by mass percentage, the chemical composition of the steel billet includes: C: 0.50-0.65%, Si: 0.45-0.95%, Mn: 0.35-0.85%, Cr: 030-0.80%, Cu: 0.20-0.55%, Ni: 0.10-0.30%, N: 0.007-0.030%, and the chemical composition of the steel billet also includes at least one of V, Nb, and Ti, wherein V: 0.02-0.15%, Ti: 0.001-0.030%, Nb: 0.01-0.08%, and the rest is Fe and unavoidable impurities. The steel rail obtained by the method provided by the present invention has excellent comprehensive properties such as resistance to low-temperature fracture, resistance to contact fatigue, corrosion resistance and weldability.

The invention discloses a method for determining the purity of electronic-grade hexafluoroethane, and relates to the technical field of the purity of hexafluoroethane, and the method comprises the following steps: vacuumizing a specific sampling container to 10 <-3 > Pa to 10 <-2 > Pa, forming a super-hydrophobic coating on the inner wall, sampling in a temperature-controlled, humidity-controlled and pressure-controlled environment, and removing water and impurities through two-stage pretreatment; enhancing analysis by using a gas chromatograph, a specific carrier gas, a column temperature program, a micro-fluidic chip and an ion mobility spectrometry; then secondary scanning analysis is carried out by using a mass spectrometer double ion source and a calibration system; and finally, learning and matching an algorithm through a data processing system machine. Samples can be accurately collected and pretreated, gas chromatography and mass spectrometry analysis is more accurate and efficient, a data processing system can accurately determine impurities and purity, multiple measurement data can be counted and analyzed, the result reliability is improved, all parts of the system are optimized and matched, the accuracy and stability of the whole process are guaranteed, and the purity is calculated; the method further comprises statistical analysis of multiple measurement data.

The invention discloses a method for purifying electronic-grade hafnium tetrachloride, which comprises the following steps of: removing insoluble substances by adopting an organic solvent matched with hafnium tetrachloride, removing low-melting-point impurities through low-temperature boiling, removing high-melting-point impurities through high-temperature sublimation, and removing substances with different chemical properties and polarities through a complexing and decomplexing method. And finally, sublimating to further remove impurities to finally obtain the electronic-grade hafnium tetrachloride with the purity not lower than 7N grade. The method has the characteristics of good purification effect, multi-method comprehensive impurity removal, industrial large-scale application, stable quality, high yield and simple and easy-to-separate impurity components.

An austenitic stainless steel material is provided that has high creep strength even when used at an average operation temperature of more than 600 to 750° C. after welding with higher heat input, and furthermore, has excellent stress relaxation cracking resistance even after use for a long time period at the average operation temperature after welding with higher heat input. The steel material has a chemical composition which consists of, in mass %, C: 0.030% or less, Si: 1.50% or less, Mn: 2.00% or less, P: 0.045% or less, S: 0.0300% or less, Cr: 15.00 to 25.00%, Ni: 8.00 to 20.00%, N: 0.050 to 0.250%, Nb: 0.10 to 1.00%, Mo: 0.05 to 5.00%, and B: 0.0005 to 0.0100%, with the balance being Fe and impurities, and a ratio of the dissolved N amount (mass %) with respect to the content of N (mass %) in the steel material is 0.40 to 0.90.

The invention provides a method for reducing electrolyte impurities based on copper foil production equipment, which comprises the following steps: identifying a pressure fluctuation abnormal region from a pressure time-frequency distribution map, taking the pressure fluctuation abnormal region as the input of a pre-constructed high-deposition region distribution model, outputting to obtain the position distribution of the high-deposition region, and determining potential high-risk nodes of impurity deposition in a pipeline; according to the determined potential high-risk node of impurity deposition in the pipeline, a filtering device is deployed at the potential high-risk node of impurity deposition, impurity particle size separation is carried out through a multi-stage filtering structure arranged in the filtering device, separated impurities with different particle sizes are directionally collected, and impurity data are obtained.

The invention provides low-cost 1500MPa-grade hot-rolled high-strength steel and a preparation method, and relates to the technical field of hot-rolled high-strength steel. The thickness of the low-cost 1500MPa-grade hot-rolled high-strength steel is 4-8mm, and the low-cost 1500MPa-grade hot-rolled high-strength steel comprises the following chemical components in percentage by mass: 0.20-0.24% of C, 2.4-2.8% of Mn, 1.4-1.8% of Al, 0.3-0.4% of Si, less than or equal to 0.01% of P, less than or equal to 0.01% of S and the balance of Fe and inevitable impurity elements. The preparation method comprises the steps of raw material weighing, continuous casting, heat treatment, hot rolling and critical annealing. According to the invention, by creatively selecting alloy elements and adjusting the content, combining hot rolling and critical annealing treatment and controlling the air cooling rate, the comprehensive properties such as strength, plasticity and impact resistance of the steel plate are synergistically improved; the method is high in resource utilization rate, low in production cost, short in process, easy to operate, high in efficiency and beneficial to industrial large-scale production and popularization.

The invention discloses hot-rolled and pickled complex phase steel with tensile strength of 800MPa and a manufacturing method thereof. The complex phase steel comprises the following chemical components: 0.030 to 0.050 percent of C, 0.15 to 0.20 percent of Si, 1.30 to 1.50 percent of Mn, 1.30 to 1.50 percent of Cr, 0.15 to 0.20 percent of Al, less than or equal to 0.005 percent of S, less than or equal to 0.012 percent of P, 0.020 to 0.030 percent of Ti, 0.0015 to 0.0025 percent of B, less than or equal to 0.0040 percent of N and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of converter smelting, LF refining, RH refining, slab continuous casting, hot rolling, laminar cooling, coiling, slow cooling after coiling and acid pickling. The yield strength of the complex-phase steel is larger than or equal to 680 MPa, the tensile strength is larger than or equal to 800 MPa, the elongation is larger than or equal to 15%, the hole expansion rate is larger than or equal to 70%, and the complex-phase steel has low crack sensitivity.

The utility model discloses a device for removing impurities in trichlorosilane, relates to the technical field of polycrystalline silicon production, and mainly aims to improve the removal efficiency of the impurities in the trichlorosilane on the basis of not increasing the cost. According to the main technical scheme, the device for removing the impurities in the trichlorosilane is characterized in that an inlet of a first mixer is connected to one end of a first feeding pipe and a second feeding pipe, a plurality of baffle plates are arranged in a reaction tank in a staggered mode and used for forming a baffle channel in the reaction tank, and one end of the baffle channel is connected to an outlet of the first mixer; the other end of the baffling channel, the filter and an inlet of the separating tower are sequentially connected, the inlet of the separating tower is further connected to a siloxane conveying pipe, a tower kettle of the separating tower is connected to the other end of the first feeding pipe and used for guiding siloxane to the first mixer, and a top collecting pipe of the separating tower is connected to the rectifying unit; wherein the second feeding pipe is used for guiding a trichlorosilane and dichlorosilane mixture containing impurities to the first mixer.

The invention relates to an ultrahigh-strength low-temperature maritime work wide thin steel plate with good cold working performance and a manufacturing method of the ultrahigh-strength low-temperature maritime work wide thin steel plate. The steel plate comprises the following chemical components in percentage by weight: 0.04% to 0.08% of C, 0.1% to 0.4% of Si, 1.0% to 1.6% of Mn, 5.0% to 8.0% of Ni, 0.4% to 0.7% of Cr, 0.8% to 1.2% of Mo, 1.0% to 1.5% of Cu, 0.2% to 0.3% of V, 0.025% to 0.045% of Ti, 0.025% to 0.040% of Zr, 0.03% to 0.06% of Als, 0.002% to 0.005% of B, less than or equal to 0.005% of P, less than or equal to 0.001% of S and the balance of Fe and inevitable impurities. A low-carbon component design is adopted, elements such as V and Ti are added, and elements such as Ni, Cr, Mo, B and Zr are compositely added; a high-cleanliness smelting control technology, an electroslag remelting technology and a composite ply rolling technology are adopted, a two-stage rolling process, a transverse-longitudinal rolling process and a heat treatment process of quenching, two-phase region quenching and critical temperature tempering are matched, and the finally obtained wide and thin steel plate has excellent comprehensive mechanical properties.

The invention relates to a P690QL2 steel plate with ultrahigh die welding and low-temperature performance and a manufacturing method of the P690QL2 steel plate. The P690QL2 steel plate comprises the following chemical components in percentage by weight: 0.04%-0.12% of C, 0.02%-0.08% of Si, 1.0%-1.2% of Mn, 1.5%-2.5% of Ni, 0.3%-0.7% of Cr, 0.7%-0.9% of Mo, 0.07%-0.12% of V, 0.02%-0.04% of Ti, less than or equal to 0.002% of S, less than or equal to 0.002% of P, 0.03%-0.06% of Als and the balance of Fe and inevitable impurity elements. The steel plate is applied to the liquid cargo tank of the LCO2 transport ship, has high strength and low-temperature toughness requirements, is easy to weld and has ultrahigh die welding performance, the V-type impact energy of the steel plate at-60 DEG C is larger than or equal to 150 J, the CTOD at-55 DEG C is larger than 0.2 mm, and the machining and welding use requirements of pressure-bearing equipment are met.

The invention discloses a high-carbon steel wire rod with long fatigue life, which contains Fe and inevitable impurities, and further contains the following chemical elements in percentage by mass: 0.80 to 0.85 percent of C, 0.20 to 0.30 percent of Si, 0.70 to 0.80 percent of Mn, 0.01 to 0.02 percent of Ni, 0.10 to 0.20 percent of Cr, 0.01 to 0.03 percent of Nb, 0.01 to 0.03 percent of V, 0.003 to 0.007 percent of Ce and the balance of Fe. The volume content of sorbite in the microstructure is higher than 95%, and the lamellar spacing of the sorbite is 80-200 nm. Correspondingly, the invention further discloses a wire rod prepared from the high-carbon steel wire rod and a manufacturing method of the high-carbon steel wire rod and the wire rod.

The invention relates to the technical field of HB450-grade thick-specification wear-resistant steel plates, in particular to a flame cutting delayed crack-free HB450-grade thick-specification wear-resistant steel plate and a production method thereof. The steel is composed of the following chemical components in percentage by weight: 0.18%-0.22% of C, 1.00%-1.10% of Si, 0.8%-1.0% of Mn, 0.015%-0.03% of Nb, 0.6%-0.70% of Cr, 0.06%-0.09% of Al, 0.0005%-0.0020% of B, more than or equal to 1.4% and less than or equal to 1.6% of Mn and Cr, and the balance of Fe and inevitable impurities. The production process flow comprises the steps of smelting, refining, slab continuous casting, casting blank heating and slow cooling, slab heating, controlled rolling, stacking and slow cooling, quenching and tempering heat treatment, flame cutting with temperature and slow cooling with hot water. The surface hardness is larger than or equal to HB450, the thickness ranges from 40 mm to 80 mm, the tensile strength is larger than or equal to 1250 MPa, the retained austenite content is 5%-7%, delayed cracks do not exist after fire cutting, the trimming hardness is larger than or equal to HB410, AKV at the temperature of-40 DEG C is larger than or equal to 40 J, and A is larger than or equal to 12%.

The invention discloses a preparation method of a ferronickel standard sample containing high-content harmful elements and the standard sample. The ferronickel standard sample contains the following chemical elements in percentage: 34.00-36.00% of Ni; fe: 64.00% to 66.00%; the content of As is 0.009%-0.011%; 0.009% to 0.011% of Sb; sn: 0.005% to 0.007%; pb: 0.005% to 0.007%; 0.002% to 0.004% of Bi; c: 0.10% to 0.20%; 0.50% to 0.60% of Si; 0.10% to 0.20% of Mn; 0.010% to 0.020% of P; s: 0.006% to 0.007%; 0.30% to 0.40% of Cr; cu: 0.04% to 0.05%; 0.60% to 0.70% of Co; 0 to 0.0020 percent of N; the balance is unavoidable impurities; the preparation method comprises the steps of standard sample smelting, standard sample preparation, segregation detection, standard sample turning and packaging, sampling detection, uniformity detection, constant value analysis and mathematical statistics. And meanwhile, the types and contents of the added harmful elements can meet the requirements of design and uniformity, and the use requirements of customers and markets are met.