When users of domestic metallurgy, foundry, and machinery industries analyze the trace elements other than carbon and sulfur in metallic materials, the following types of instruments can be used:
1. Spectrum Analyzer. The advantage is that multiple elements can be analyzed at a time with high precision. The disadvantage is that the price is too high, a set of hundreds of thousands to millions, so currently only a few large companies use.
2. Spectrophotometer. The advantage is that the detection wavelength is easy to choose and the price is not high. The disadvantage is that the test result can not be directly displayed (to be converted); there is no curve to establish the call function, detection of different elements every time to re-calibration; the cuvette into and out of the liquid is inconvenient; the basic knowledge of the operator's chemical analysis requirements Therefore, it cannot meet the needs of on-site on-line inspection and analysis.
3. Colorimetric analyzer. The advantage is that it is easy to use, the price is not high, and the operator's chemical analysis basis is not very demanding. Therefore, it is widely used in the production inspection field analysis. However, because of its historical reasons, there are the following congenital defects.
The electro-optical colorimetric metal element analyzer was developed in China in the 1960s to meet the needs of on-site on-line inspection and analysis of the five major elements (carbon, sulfur, silicon, manganese, and phosphorus) of iron and steel metallurgy. At the time, carbon and sulfur were detected using a carbon-sulfur analyzer, and silicon, manganese, and phosphorus were measured. An elemental analyzer (three elements at the time, three channels were fixed at predetermined wavelengths to detect silicon, manganese, and phosphorus, respectively) was used. Silicon, manganese, and phosphorus were used. The wavelength required for the detection is not large, and the accuracy is not high. Therefore, the three-element analyzer satisfies the need for online on-line analysis of elemental content in the iron and steel metallurgy industry. However, nowadays, materials that need to be tested in various industries include copper alloys, aluminum alloys, and zinc alloys in addition to steel. The elements examined also evolved from silicon, manganese, and phosphorus to copper, chromium, nickel, zinc, magnesium, tungsten, vanadium, and niobium. , titanium, molybdenum, aluminum, arsenic, zirconium, boron, rare earth elements and other elements. The following defects commonly found in traditional photoelectric colorimetric metal element analyzers are increasingly manifested:
1. The measurement wavelength is preset and cannot be adjusted continuously. Although some models can be replaced (by replacing filters or light emitting diodes), it is still cumbersome for the user to meet the element types that exceed the number of channels of the instrument. Or it is particularly inconvenient to test different alloy materials. And not all wavelength filters and LEDs can be purchased, making it difficult to measure certain elements. For example, the measurement of magnesium requires a 576-nm light source, and filters and LEDs of this wavelength are not available.
2. The measurement light source is mostly a DC bulb plus a filter or a cold light emitting diode, and its wavelength accuracy is poor. The wavelength accuracy of the DC bulb plus filter method depends on the filter, and most of the filter elements used in the elemental analyzer can only achieve ±15 nm. The wavelength accuracy of light emitting diodes depends on the diodes used. Most of the errors range from 20 to 30 nm, which does not guarantee the accuracy of analysis and detection.
The application of new materials and new technologies requires the types of elemental analysis in various industries to be more demanding. Faced with the inherent defects and market pressures of traditional elemental analyzers, many manufacturers have adopted the following countermeasures:
1. Increase the number of instrument analysis channels, that is, increase the number of preset fixed wavelengths, thereby increasing the number of elements that can be detected;
2. Predetermined different fixed wavelengths for predetermined different uses, so as to form different types of elemental analyzers that detect different materials and different elements respectively.
RY series metallic material element analyzer is the first domestic and brand new comprehensive analytical instrument. One instrument can satisfy C, S, Mn, P, Si, Cr, Ni in carbon steel, high-low-alloy steel, stainless steel, cast iron, gray cast iron, ductile iron, wear-resistant cast iron, alloy cast iron, cast steel and other materials The contents of elements such as Mo, Cu, Ti, V, Al, W, Nb, Mg, and rare earth elements were examined. Samples were burned in an electric arc furnace, C was measured by gas volumetric method, S was measured by iodine titration automatically, and other elements were measured by photoelectric colorimetry.
Branded computer, full Chinese menu operation, established a powerful database for the analysis of the storage and query of result data and working curve, its data modification and addition and deletion of curves are very convenient. Equipped with a precision electronic balance of one ten-thousandth, desktop printer prints results.
First, the main technical parameters:
1. Measurement range: (More elements can be detected in the instrument, now carbon, sulfur, silicon, manganese, phosphorus, nickel, chromium, molybdenum, titanium, copper, rare earth, and magnesium are taken as examples in ferrous metals)
C: 0.020 to 6.000% S: 0.0030 to 2.000% Si: 0.010 to 6.000% Mn: 0.010 to 18.00%
P: 0.0005 to 2.000% Ni: 0.010 to 30.00% Cr: 0.01 to 28.000% Mo: 0.010 to 7.000%
Ti: 0.010 to 5.000% Cu: 0.010 to 8.000% Σ RE: 0.010 to 0.500% Mg: 0.010 to 0.200%
2、Measurement accuracy: in line with GB/T223.69-2008GB/T223.68-1997 GB/T223-88 standard 3, electronic balance: weighing range 0-100g reading accuracy 0.0001g
4, the computer: mainstream models 19 inch liquid display two, the main features:
1. The system is controlled by a computer and can determine the content of elements in most metal materials. The programming of the system program adopts the current fashion visual programming language, so the system is powerful, the interface is friendly, and the operation of the system is simple and quick.
2. During the analysis process, the system automatically follows the zero point and full scale, and is assisted by the computer to ensure the measurement accuracy.
3, equipped with an electronic balance, to achieve a quantitative analysis of the process, improve the system's analysis speed.
4. The test software has complete functions, which can completely replace the manual writing work of the traditional laboratory, and can set the test report format arbitrarily according to the actual needs of each unit, and can input arbitrary detection conditions to query historical data; each element detection report is one-time Print, do not need to print the test results of C, S separately.
5, the key components of the instrument --- micro pressure sensor, especially selected imported brands. Ensure the instrument's measurement accuracy, instrument stability and life cycle.
