81results about "Testing metal constituents" patented technology

A method for non-destructive evaluation of a manufacturing process when forming a three-dimensional article through successive fusion of parts of a metal powder bed, which parts corresponds to successive cross sections of the three-dimensional article, the method comprising the steps of collecting an X-ray signal, created by the electron beam, from at least one position of the first and/or second metal powder layer and/or a melt pool of the first and/or second metal powder layer and/or a fused first and/or second powder layer by an X-ray detector, comparing the X-ray signal with a reference signal, alarming if the generated X-ray signal compared to the reference signal is indicating contamination material of larger amount than a predetermined value and/or a deviation in Atomic % of the powder material larger than a predetermined value.

A method and apparatus for the metallurgical qualitative analysis (assay) and valuation of precious metals objects such as jewelry or coins. The system integrates a commercially available x-ray florescence (XRF) metals analyzer with associated peripheral devices including a personal computer and keyboard or touchpad computing device, a digitizing scale, a printer, an Internet link for obtaining current precious metals market price quotations, and software for processing the qualitative results with the current market price data and presenting the results to the system operator in real time. The system optionally includes a customer interface including a display screen for presenting the customer with the results of the analysis and valuation, and customer input means for accepting and recording a purchase transaction.

The present invention relates to a method for detecting steel sample components by using a multi-pulse laser induced plasma spectral analysis device, and in particular, to a method for detecting steel sample components by using a multi-pulse laser induced plasma spectral analysis device that includes picosecond and nanosecond laser pulse widths. A laser induced light source is a laser light source that includes nanosecond and picosecond ultrashort pulses, and one pulse laser device can be used to generate two pulse lasers, namely, a nanosecond and a picosecond laser; the two pulse lasers pass through a same output and focusing light path, so as to ensure that the two pulse lasers are focused on a same position of a sample to be detected; a surface of the sample is irradiated by using a first beam of nanosecond laser pulse to generate plasmas; subsequently, the plasmas are irradiated by using a second beam of picosecond laser pulse to enhance spectral line emission.

A precious metal testing apparatus and methods adapted to analyze impurities in a precious metal test sample is described. The testing apparatus contains a test probe that has a replaceable portion and that is connected to a meter to measure resistance. The replaceable portion contains or forms a reservoir that includes at least one electrolyte component, a conductive member, and a fibrous tip. The electrolyte component is fluidly associated with a fiber tip and the conductive member contacts an electrical contact located outside the reservoir. Methods of testing and instructions regarding such methods are also included.

The invention belongs to the technical field of steel manufacturing, and particularly relates to a component change prediction method and system for a special steel type mixed casting blank, and particularly relates to a component change prediction method for a special steel type mixed casting blank. The method comprises the following steps of: collecting a mixed casting blank sample, and analyzing the component change of the mixed casting blank sample; acquiring the tundish residual steel quantity and the tundish steel production capacity, and fitting a mixing degree function model according to the component change, the tundish residual steel quantity and the tundish steel production capacity; acquiring the continuous casting pulling speed and the width of the mixed casting blank sample, and fitting a liquid core impact depth function model according to the component change, the continuous casting pulling speed and the width; and according to the mixing degree function model and the liquid core impact depth function model, predicting the initial position and the final position of the mixed casting blank, wherein the mixing degree function model and the liquid core impact depth function model are established without depending on laboratory digital analog calculation or water model experiments, so that the prediction accuracy is high.

The invention relates to a rapid analysis method for major elements, minor elements and trace elements in alloy slag charge. The rapid analysis method comprises the following steps: performing ultrasonic alkaline liquid cleaning on alloy slag charge, cleaning with pure water, performing ultrasonic cleaning with an organic reagent and blow-drying, preparing a cake-shaped sample by using the alloy slag charge, pressing the cake-shaped sample, grinding, polishing, cleaning with the organic reagent and blow-drying, and analyzing major elements, minor elements and trace elements in the cake-shapedsample by using at least one instrument of a carbon-sulfur analyzer, an oxygen-nitrogen-hydrogen analyzer, a spectrograph, an X ray fluorescent spectrograph and a mass spectrometer. The method provided by the invention can optimize a combination according to detectability and ranges of the instruments and perform analytical determination on the major elements, minor elements and trace elements, and determination cost is reduced; and the method has good guiding effect on high-temperature alloy slag charge remelting and smelting.

A method and system to identify an unknown metal alloy based on its chemical composition is provided in the present application. The chemical elements contained in the alloy are separated into key elements and trap elements. Then a correlation factor is applied to each key element and a similarity factor is calculated based on the correlation factors.

Disclosed is a method for analyzing a metallic material, which comprises the following steps: an electrolysis step of electrolyzing a metal sample in an electrolysis solution; a step of removing the metal sample from the electrolysis solution after the electrolysis is completed; a separation step of immersing the metal sample removed from the electrolysis solution in a dispersing solution which is different from the electrolyte solution and has dispersibility, thereby isolating at least one member selected from the group consisting of a precipitate and an intervening material adhered to the metal sample; and an analysis step of analyzing at least one member selected from the group consisting of the precipitate and the intervening material extracted in the dispersing solution.

The invention discloses a method for analyzing a defect type through a scanning electron microscope and a microscope in the technical field of precision casting. The method comprises the following steps: 1) preliminarily judging the surface defect of a casting to confirm whether the defect is shrinkage porosity or not; 2) performing metallographic confirmation on the defect position by using the electron microscope and the scanning electron microscope; and 3) carrying out comparison according to the morphological characteristics and the element content of the defect to determine the defect type. In the step 1), formation reason and the judgment method of the shrinkage porosity are as follows: formation reason: since a final solidification area of the casting is not fed by liquid metal or alloy, dispersed and fine shrinkage cavities are formed, and the alloy liquid is divided into a plurality of small closed areas; and when the alloy liquid in the closed areas is solidified and shrunk and cannot be supplemented, shrinkage porosity is caused. The problem that the defect type and the defect cause reason cannot be judged can be solved.

A scale composition determination device (10) determines that Fe₂O₃ has been generated in the outermost layer of a scale (SC) in the case where the absolute value of a difference between temperatures of a steel material SM measured by radiation thermometers (20a, 20b) is equal to or more than a predetermined temperature, and determines that Fe₂O₃ has not been generated in the outermost layer of the scale (SC) in the case where the absolute value of the difference between the temperatures of the steel material SM measured by the radiation thermometers (20a, 20b) is not equal to or more than the predetermined temperature.

The invention discloses an image method for determining a value range of a microscopic segregation ratio in steel, and belongs to the technical field of measurement of microscopic segregation in steel. Surface scanning data of specific alloy element components of a sample are processed through a computer statistical program, and the value of X is determined through an image comparison method, thatis, the value range of the segregation ratio is calculated. And when the value range X changes, the distribution of the data points in the maximum content interval and the minimum content interval isdisplayed on the segregation tissue image in the form of an image. And a proper X value is selected according to the distribution rule of the data points. The method has the advantage that the valuerange of the microscopic segregation ratio in the steel can be accurately determined.

The invention relates to a preparation method for a sample used for rapid determination of a chemical component in alloy slag charge. The preparation method comprises the following steps: sorting, performing heated ultrasonic cleaning in an alkaline cleaning liquid, cleaning in pure water, performing ultrasonic cleaning in an organic reagent, melting and performing sample preparation under a negative pressure condition and in an inert gas atmosphere as well as grinding and polishing. The method provided by the invention is simple in steps and easy to operate, and blocky samples meeting spectroscopic analysis or mass spectrometry requirements can be prepared easily; and many samples are molten and can be used for analyzing uniformity of the alloy slag charge.

A spectroscopic analysis apparatus includes: a light projecting device; a light receiving device; and an output device, wherein the light receiving device includes: a separator configured to separate reflected light into s-polarized light and p-polarized light; a detector for s-polarized light configured to output an electric signal indicating an intensity of the s-polarized light; and a detector for p-polarized light configured to output an electric signal indicating an intensity of the p-polarized light; and the output device is configured to: calculate an absorbance based on a ratio between the intensities of the s-polarized light and the p-polarized light using the electric signals output from the detector for s-polarized light and the detector for p-polarized light; and calculate either or both of the composition and the composition ratio of the surface of the measurement target object using an intensity of the absorbance at any desired wavenumber.

The invention discloses a method for quantitatively evaluating the influence of vacuum degree and oxidation products on high-temperature alloy performance, and belongs to the field of high-temperaturealloys. The method comprises the steps of controlling the grading vacuum degree during smelting, solidifying and gathering the oxidation products in sequence, and testing the comprehensive mechanicalproperty of the corresponding state in a matched mode; quantitatively evaluating the vacuum degree, the oxidation product and the influence of the oxidation product on the mechanical property of thenickel-based superalloy. Meanwhile, the type and the content of trace oxidation products in the alloy can be determined, a basis is provided for determination of preparation process parameter tolerance, and technical support and guarantee are provided for preparation of high-purity high-temperature alloy, improvement of the percent of pass of nickel-based high-temperature alloy parts and reductionof cost. The problems that in the prior art, only the vacuum degree, the average gas content (including the oxygen content) of a solidified sample and the alloy mechanical property are considered, and consequently the average gas content and the mechanical property cannot be directly hooked are solved.

A plasma spectroscopic analysis method includes a concentration process including a voltage application period in which voltage is applied to a pair of electrodes in the presence of a sample thereby concentrating an analyte contained in the sample in the vicinity of at least one of the pair of electrodes; and a detection process of generating a plasma by applying voltage to the pair of electrodes and detecting light emitted by the analyte due to the plasma. An electric current between the pair of electrodes is constant while applying voltage for at least a part of the duration of the concentration process.