The carbon and sulfur analyzer is simply measuring the content of carbon and nitrogen in the sample. Chuangxiang Company started as a carbon and sulfur analyzer at the
earliest, and cut through the multi-element analyzer. After the single product is done well, it gradually extends to other types of analytical instruments. The emphasis on carbon and sulfur analyzers has not diminished, from the previous split of the computer and the instrument to the newly developed one.
The latest integrated CS-910 high frequency infrared carbon and sulfur analyzer
So what is the analysis principle of carbon and sulfur analyzer? It is well known that both carbon and sulfur are non-metallic elements, and corresponding carbides or sulfides can be formed in metals or alloys. It can be oxidized to CO2 and SO2 under high temperature and oxygen-rich conditions.
Both CO2 and SO2 are polar molecules with permanent electric dipole moments, so they both have structures such as vibration and rotation. They are divided into split energy levels according to quantum mechanics and are coupled with incident characteristic wavelength infrared radiation to generate absorption. The concentration of the corresponding gas can be calculated by measuring the intensity of the absorbed thick infrared light, which is the theoretical basis of infrared gas analysis. The infrared carbon and sulfur analyzer uses CO2 and SO2 at 4.26μm and 7.4μm, respectively, and has a strong characteristic absorption band. The CO2 and SO2 content is analyzed by measuring the light absorption intensity of the gas to indirectly determine the The percentage of carbon and sulfur.
Carbon exists in steel in two main forms:
One is compound carbon, that is, carbon exists in a combined form, mainly in the form of iron carbides and alloy elements. For example, Fe3C, Mn3C, Cr3C2, WC, W2C, VC, TiC, etc.
The other is free carbon. For example, carbon in iron-carbon solid solution, amorphous carbon, graphite carbon, and annealed carbon are collectively called free carbon.
In steel, it is generally composed of carbon, and free carbon exists only in iron and annealed high carbon steel. Combined carbon and free carbon are called total carbon. An infrared carbon-sulfur analyzer measures the total carbon content of a sample.
Carbon is an important element in steel. When the carbon content increases, its strength and hardness increase, while its ductility and ductility decrease, making the steel brittle and difficult to process. Conversely, as the carbon content decreases, the steel's Improved toughness and easy chip processing. Sulfur is a harmful element in steel. It exists in steel in the state of sulfides, mainly MnS. If the manganese content is low, the excess sulfur and iron synthesize FeS. FeS and MnS are the causes of cracks during thermal deformation. This poor performance is called hot brittleness. In addition, the presence of sulfur in the steel can reduce the mechanical properties of the steel (mainly fatigue limit, plasticity and wear resistance). The presence of sulfur is also detrimental to the corrosion resistance and weldability of steel. Therefore, the lower the sulfur content in steel, the better. Generally, the content of sulfur in steel is at least one order of magnitude less than that of carbon.
Transcend's current carbon and sulfur analyzer products are high-frequency infrared carbon-sulfur analyzers, which use the high-frequency furnace program to heat up, and have automatic constant temperature heating furnace head, automatic cleaning, automatic back blow and reverse ash discharge and other technical characteristics.