Carbon* Element Analyzer Analysis Principle

At present, a large number of domestic carbon-sulfur analysis instruments mainly include the following types: infrared carbon and sulfur analysis instruments, high-speed carbon and sulfur analysis instruments, and non-aqueous carbon and sulfur analysis instruments. Users can perform according to their own needs and the advantages and disadvantages of various carbon and sulfur analysis instruments. select.

Carbon with a content of more than 1.70% is called cast iron and less than 1.70% is called steel. Generally, the steel with carbon content higher than 0.60% is called high-carbon steel, the steel with carbon content between 0.25% and 0.60% is called medium carbon steel, the steel with carbon content less than 0.25% is called low-carbon steel, and the carbon content is less than 0.04%. Called industrial pure iron.

Carbon plays an important role in the performance of iron and steel analytical instruments. As the carbon content increases, the hardness and strength of the steel increase, and the toughness and plasticity decrease. On the contrary, when the carbon content decreases, the hardness and strength decrease, while the toughness and plasticity increase. . The carbon-sulfur analysis instrument is a commonly used measurement instrument in the physics and chemistry analysis room of an enterprise. It is used to quantitatively analyze the contents of carbon and sulfur in metal and non-metal materials and is widely used in metallurgy, casting, machinery, vehicles, pump valves, Ore, environmental protection, quality inspection and other industries and fields, can be quickly and easily carried out raw material acceptance, furnace analysis, product testing and other stages of analysis and testing.

Sulfur exists in steel and deteriorates the quality of steel, reducing its mechanical properties, corrosion resistance, and weldability. In particular, sulfur in steel, if it exists in the state of iron sulfide, due to its low melting point (about 1000 °C), will cause the phenomenon of hot brittleness of the steel, that is, thermal deformation, cracking at high temperature, affect the quality of the product and Service life. Therefore, the lower the sulfur content in the steel, the better. General requirements, sulfur content in ordinary steel is less than 0.050%, <Sulfur content in tool steel is less than 0.045%, and sulfur content in high-quality steel is less than 0.020%.

In view of the important role of carbon and sulfur content in the quality and performance of steel, it is of great significance to examine the carbon and sulfur content in steel, that is, carbon and sulfur analysis. The carbon and sulfur elements in steel stainless steel analyzers are at high temperatures (1200 °C to 1400 °C). The gases can be converted to gases, and SO2 is generated. This is the basis for the combustion analysis of carbon and sulfur.