33 results about "Metallurgical assay" patented technology

The invention discloses a method for rapidly testing casting blank segregation by utilizing a direct-reading spectrometer, which is suitable for the quantitative and trending detection in the casting blank segregation, belonging to the technical field of metallurgy analyzing and detecting. In the method, the direct-reading spectrometer is adopted to simulate an in-situ analyzer to detect the casting blank segregation; and the direct-reading spectrometer segments and dots a test sample, and simulates the in-situ analyzer to analyze the test sample, so as to quantitatively detect the continuously cast blank macrosegregation. The method can overcome the defects that the in-situ analysis sample preparation is complex, the testing period is long, the detection cost is high and the like, satisfies the generalized quantitative detection to the casting blank in the continuous casting production, and provides a good popularization and reference method for the iron and steel enterprises owning rapid spectrum analyzers in the trending and quantitative detection of the continuously cast blank segregation. Compared with the traditional pickling method for detecting the casting blank segregation, the method has the same trend on the description of the casting blank segregation as that of the pickling method; the casting blank segregation result detected by the direct-reading spectrometer not only can describe the casting blank segregation condition, simultaneously can clearly describe the component segregation curve of each element, and has the visual digitized function.

The invention discloses a gross segregation quantitative analyzing method of a continuous casting sheet billet that adopts an image analyzing method, belongs to the technical field of metallurgical analysis, and comprises the following steps: the structural content change of the sheet billet in the thickness direction is obtained through metalloid image analysis, the structural volume percent is converted into the mole percent through crystal lattice volume computation, a binary phase diagram of the carbon weight percent and the austenite structure mole percent is obtained through thermodynamic computation, and the structural mole percent in each analyzed region is converted into the carbon weight percent. The gross segregation quantitative analyzing method has the advantages that the analyzing method that combines the metalloid structure image analysis method with the thermodynamic computation is adopted for analyzing the gross segregation of the sheet billet, thus quantitatively analyzing the carbon gross segregation in the sheet billet, more precisely observing and analyzing the carbon content distribution in the sheet billet, and consequently providing a novel tool for examining and analyzing the gross segregation of the sheet billet.

The invention discloses a method for measuring aluminum, magnesium, calcium, vanadium, titanium, nickel, copper and manganese in rare earth silicon-magnesium alloy, and belongs to the field of metallurgy analyzing methods. The aim that the provided method for measuring aluminum, magnesium, calcium, vanadium, titanium, nickel, copper and manganese in the rare earth silicon-magnesium alloy is high in sensitivity, high in measuring speed, easy and convenient to operate and small in interference relative to other methods, has good selectivity, and can provide accurate data for the smelting ingredient control process is achieved. The method comprises the following steps that 1, a sample is prepared; 2, the sample is dissolved; 3, a standard calibration curve solution is prepared; 4, a standard curve is drawn; 5, the content of all elements is measured. The method is high in precision, high in accuracy, fast, simple and convenient to use, and can be used for measuring the content of aluminum, magnesium, calcium, vanadium, titanium, nickel, copper and manganese in the rare earth silicon-magnesium alloy in production.

The invention discloses a preparation method of an ultrapure ferritic stainless steel spectral standard sample, and belongs to the technical field of detection of metallurgical samples. The method comprises the following steps: design of a billet mold, baking and preheating of the billet mold, component design, selection of furnace material, smelting of a vacuum induction furnace, de-molding, testof physical properties, preliminary test of chemical composition and segregation, casting billet sampling, acceptance test of chemical compositions of the sample, preliminary test of uniformity, andprocessing of spectral blocks. The preparation method prepares the ultrapure ferritic stainless steel spectral standard sample with good uniformity and stability by strictly following the requirementsof GB/T15000 "International Standard Sample Working Guidelines" and YB/T082-1996 "Technical Specifications for International Standard Samples for Metallurgical Analysis", which can replace the standard sample of non-similar stainless steel for comparison and calibration of the direct reading spectrometer and the X-ray fluorescence spectrometer, and solves the problem of detection deviation causedby the matrix effect in the inspection of the ultrapure ferritic stainless steel sample, thereby achieving precise control of process quality.

The invention discloses a multi-element standard solution for analyzing harmful elementary compositions in steel and a preparation method of the multi-element standard solution, and belongs to the technical field of metallurgical analysis. The solution contains the following elements of: arsenic (As), stibium (Sb), bismuth (Bi), plumbum (Pb), zinc (Zn) and cadmium (Cd); the content of each element is 0.01mg/mL; and a solution medium is HNO3 at the mass concentration of 5 percent. By tightly combining the characteristic of the alloy composition of a steel material, the standard problem of inductively coupled plasma (ICP) instruments for material alloy analysis can be solved, interferences of an iron base body and a background can be eliminated, traceability is realized, the analysis time is shortened greatly, and the multi-element standard solution is convenient for users.

The invention belongs to the technical field of metallurgical analysis and relates to an improvement on a method for analyzing components of nickel-based high-temperature alloy steel. A method for measuring the components of the nickel-based high-temperature alloy steel comprises the following steps: determining an analysis condition; preparing an analysis sample; making a calibration curve; analyzing the sample; calculating the analysis result. The invention provides a method for measuring components of nickel-based high-temperature alloy steel by using a photoelectric direct reading spectrometer, so that analysis equipment is reduced, analysis procedures are simplified, analysis period is shortened, and analysis cost is reduced.

The invention discloses a set of alum clay standard samples, belonging to the technical fields of new materials and metallurgical analysis. The set comprises five samples of which the Al2O3 contents are respectively 45-50wt%, 60-65wt%, 70-75wt%, 80-85wt% and 85-90wt%; and the five samples are simultaneously used for determining the contents of 12 components such as Al2O3, CaO, MgO, P2O5, Fe2O3, TiO2, SiO2, K2O, Na2O and the like. The set of alum clay standard samples covers the typical composition points of the currently used alum clay such as laterite, alumina, bauxite and the like. The standard samples are used for testing the quality of alum clay products, performing evaluation and unified measurement test on a calibration and measuring method of a measuring instrument, performing production control analysis on the products, and evaluating the technical levels of laboratories and analysis staff; and meanwhile, the standard samples are also applicable to the evaluation and arbitration of such products in external technical exchange and trading.

The invention discloses a standard sample for spectral analysis of free cutting steel SAE1215, belonging to the technical field of new materials and metallurgical analysis. Specification of the standard sample is a cylinder of phi 40 mm * 40 mm, the standard sample comprises iron which is matrix ingredient, alloy elements consisting of 0.06-0.07% of C by weight, 0.01-0.02% of Si by weight, 1.25-1.35% of Mn by weight, 0.05-0.06% of P by weight, 0.35-0.40% of S by weight, 0.02-0.04% of Cr by weight, 0.005-0.01% of Ni by weight and 0.005-0.02% of Cu by weight, and less than 0.05 of the other impurity elements by weight. The standard sample is featured with good uniformity, accurate measurement value, good stability and convenience, and is capable of meeting demands on calibration and test for spectrometer, so that the standard sample is a better material standard for measuring free cutting steel SAE1215.

The invention discloses a square billet center macrosegregation analysis method, and belongs to the technical field of metallurgical analysis. The method comprises the following steps: carrying out sampling, sample processing, macroscopic examination and drilling chemical analysis on a square billet continuous casting billet by using a vertical plane forming an included angle with the central longitudinal section. According to the invention, the vertical sample cutting method forming a certain included angle with the central longitudinal section is creatively applied to the sample preparationmethod in the center macrosegregation analysis process of the square billet continuous casting billet; the deviation of a casting blank center segregation analysis result caused by a sample cutting position factor can be reduced, the accuracy of casting blank center segregation condition analysis is improved, and accurate reference information is provided for casting blank quality monitoring or process improvement.

The invention discloses a method for measuring the content of silicon dioxide, aluminum oxide and magnesium oxide in carbide slag, belonging to the technical field of metallurgical analysis methods. The purpose is to provide a detection method with low pollution, fast speed, low detection limit and saving manpower and material cost for measuring the content of silicon dioxide, aluminum oxide and magnesium oxide in carbide slag. The main method flow is: use hydrochloric acid ( 1+1) Dissolve most of the samples, filter the solution, wash the residue and transfer the solution to a 250mL volumetric flask, dilute to the mark with water, and shake well. The plasma spectrometer is used for measurement, and the content of the analytical elements in the sample is obtained according to the calibration curve prepared by the standard solution. The determination method of the invention can be used for rapid determination of the content of silicon dioxide, aluminum oxide and magnesium oxide in carbide slag.

The invention relates to a method for analyzing fluorine and chlorine in smelting dust through X-ray fluorescence spectroscopy, and belongs to the technical field of metallurgical analysis. The methodcomprises the following steps of 1 analysis specimen preparation; 2 standard sample and monitoring sample preparation; 3 measurement condition selection; 4 standard curve drawing; 5 drift correction;and 6 sample analysis. According to the method, an X-ray fluorescence spectrometer is creatively applied in detection on fluorine and chlorine in smelting gas, and the test rate of fluorine and chlorine in the smelting gas is greatly increased; only a small amount of boric acid and binder is needed, consumption of chemicals is reduced, and compared with an existing analysis method, generation ofwaste acid, waste water and the like in the analysis process is avoided, and not only is manpower saved, but also pollution is reduced; and in addition, data of the adopted method is accurate and reliable, analysis data is quickly and accurately provided for the metal smelting process, and therefore the method is more beneficial to production control.

The invention discloses a standard sample for spectroscopic analysis of a welding wire steel ER50-6, and belongs to the technical fields of new materials and metallurgical analysis. The standard sample is a cylinder the standard of which is phi 40 mm* phi 40mm, and comprises the following constituents: iron serving as a matrix constituent; and alloying element constituents: 0.07-0.09% of C, 0.88-0.92% of Si, 1.45-1.55% of Mn, 0.018-0.022% of P, 0.01-0.015% of S, 0.02-0.03% of Cr, 0.005-0.01% of Ni,0.005-0.01% of Cu, and the contents of other impurity elements are all less than 0.005%. The standard sample has the advantages of good uniformity, exact magnitude and good stability, and is convenient to use; can meet job requirements of a spectrograph such as calibration and test, and provides a good material standard for measuring free cutting steel SAE1215.

The invention discloses a method for measuring the content of stibium in steel and belongs to the field of metallurgical analysis methods. The method for measuring the content of stibium in steel aims at overcoming the defects that in the prior art, chemical reagents used for measuring the content of stibium in steel are more, harm is caused to the environment and the human body, interference factors are more, and the analysis speed is low. The method includes the following steps that firstly, a sample solution is prepared; secondly, a stibium working curve standard solution is prepared; thirdly, the content of stibium is measured. Chemical reagents used in the method are less, no harm is caused to the environment and testers, interference factors are less, a sample can be directly loaded on a machine to be measured after dissolving and being kept at constant volume, operation is easy, convenient and quick, the measuring range is 0.00001%-0.010%, the lower measuring limit is low, accuracy is high, and the method is suitable for measuring the content of stibium in steel in scientific research and production.

Belonging to the field of metallurgical analysis methods, the invention discloses a determination method for the content of arsenic, tin and zinc in steel, and aims to solve the disadvantages of unable simultaneous determination of the content of arsenic, tin and zinc three elements in steel, a lot of use of chemical reagents, harm to the environment and human body, many interference factors, slow analysis speed, and low accuracy in the prior art. The determination method comprises the steps of: 1. preparation of a sample solution, 2. preparation of an arsenic, tin, zinc working curve standard solution, and 3. determination of the content of arsenic, tin and zinc in steel. The method provided by the invention has the characteristics of low detection limit of 0.10ng/ml, simple and fast analysis method, few reagent, little interference, fast analysis speed, good precision, and high accuracy, and is suitable for simultaneous determination of the content of arsenic, tin and zinc three elements in steel.

The invention belongs to the technical field of metallurgical analysis, and provides a contrast detection method for determining the content of diboron trioxide in a metallurgical slag system. Aiming at the special component characteristics of the metallurgical slag system, the invention provides a contrast detection analysis method to eliminate the interference of amphoteric elements and other factors on the titration result in the titration process so as to realize the accurate detection of the content of diboron trioxide in the metallurgical slag system. The method does not need to introduce other reagents, is relatively low in cost, simple, convenient and rapid to operate and accurate and reliable in determination result, and provides a way for determining the content of the diboron trioxide in the metallurgical slag system.

The invention discloses an analysis method for determining primary and secondary components in composite vanadium-nitrogen alloy. According to the analysis method, a powdery composite vanadium-nitrogen sample and a sodium peroxide flux are added into a corundum crucible, a high-temperature muffle furnace is used for melting, hydrochloric acid is used for removal, a stable solution is formed and used for an ICP-AES method. The method has the advantages of being rapid, accurate and reliable, can help improving the automatic degree of metallurgical analysis instruments, and can be popularized tocomposite vanadium-nitrogen alloy acceptance check of all steel plants and process control of composite vanadium-nitrogen alloy production enterprises in the metallurgical industry.

The invention provides a method for measuring the content of sodium in a slagging agent. The method comprises the following steps: a, decomposing a slag melting agent sample by using aqua regia under a microwave condition at the temperature of 200-220 DEG C, carrying out constant volume, filtering to remove insoluble substances to obtain a target solution, and adding a potassium ion solution with the content of 0.01 mg/mL into the target solution; b, selecting five parts of 2mL coloring liquid, sequentially adding 2-10mL of target solution into the coloring liquid, and adding water to dilute the coloring liquid to 200mL to obtain a to-be-detected solution; c, selecting an analysis element sodium with the spectral line wavelength of 589.5 as an analysis line; d, measuring the absorbance of the solution to be measured by adopting inductively coupled plasma atomic emission spectrometry, and making a curve graph; e, analyzing according to the curve graph to obtain the sodium concentration. The method is high in analysis speed, wide in dynamic linear range and higher in precision, and can be widely applied to modern metallurgical analysis.

The invention discloses a special annular standard sample for quantitative carbon and sulfur analysis and a manufacturing process of the special annular standard sample and belongs to the technical field of metallurgical analysis. The special annular standard sample for quantitative carbon and sulfur analysis is a steel material or cast iron or pig iron comprising the following chemical components of, by weight, 0.10% to 0.75% of C and 0.010% to 0.035% of S. The special annular standard sample for quantitative carbon and sulfur analysis is annular. A traditional special chip-shaped standard sample for carbon and sulfur analysis is changed into the special annular standard sample for carbon and sulfur analysis, and the special annular standard sample for quantitative carbon and sulfur analysis is short in machining process, not prone to pollution and capable of guaranteeing evenness, so that the quality of the standard sample is guaranteed, and the detection speed is increased.

The invention discloses a method for determining nitrate ions in high-iron and copper matrix samples, relates to the technical field of metallurgical analysis, and solves the problem of inaccurate nitrate ion determination caused by iron and copper interference in the analysis and determination process of the nitrate ions in the high-iron and copper matrix samples. The determination method comprises the following steps: selecting a sample determination system as a sulfuric acid system, selecting a dual-wavelength method with wavelengths of 210 nm and 275 nm, successfully deducting the interference of the iron matrix, deducting the interference of the copper matrix at the nitrate determination wavelength of 210 nm and within a certain concentration range and the absorbance of the copper ions conform to the Lambert-Beer law, and finally calculating the concentration of the nitrate ions through a formula. According to the determination method provided by the invention, the determination interference of copper and iron matrixes on the nitrate ions is successfully deducted, an analysis method which meets the process requirements and can realize rapid determination of the nitrate ions is developed, and the determination method has the characteristics of high analysis and test speed, low cost, good stability, high accuracy and convenience in operation.