Multi-element analysis instrument for chemical composition detection advantages of steel

In addition to the main chemical composition iron (Fe), the steel contains a small amount of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), titanium (Ti), vanadium (V) Such elements, although the content of these elements is small, but have a great impact on the performance of steel: Nanjing Qilin Scientific Instrument Group Co., Ltd. professionally developed QL-S3000C computer infrared all-in-one multi-element analyzer for steel materials detection, by infrared and than The accurate detection of the principle of color matches the configuration of physical and chemical laboratories perfectly. Its requirements for performance, quality and precision have fully met the international standards, and the total investment price is really worthy! The use of computers to achieve program control and data processing. It can quickly and accurately measure the mass fraction of various elements in steel and non-ferrous metals, and has a high degree of automation. The first element analyzer is not a quantitative one, accurate and reliable, and is user-friendly.

Computer infrared all-round multi-element analyzer

Chemical composition of steel and its effect on the properties of steel

1. carbon. Carbon is the most important element in determining the properties of steel. The effect of carbon on the properties of steel is shown in Figure 6-3. When the carbon content in the steel is below 0.8%, the strength and hardness of the steel increase as the carbon content increases, while the plasticity and toughness decrease; but when When the carbon content is 1.0% or more, the strength of the steel material decreases as the carbon content increases. With the increase of carbon content, the welding performance of steel products deteriorates (steel with a carbon content greater than 0.3%, the weldability decreases significantly), cold brittleness and aging sensitivity increase, and resistance to atmospheric corrosion decreases. The carbon steel used in general engineering is low-carbon steel, ie the carbon content is less than 0.25%; the low-alloy steel used in the project has a carbon content of less than 0.52%.

Multi- element analyzer for chemical composition detection advantages of steel

2. silicon. Silicon is present in steel as a deoxidizer and is a beneficial element in steel. When the silicon content is low (less than 1.0%), the strength of the steel can be improved without significant influence on the plasticity and toughness.

3. manganese. Manganese is used to deoxidize sulfur in steelmaking and exists in steel. It is a beneficial element in steel. Manganese has a strong ability of deoxidation and desulfurization, can eliminate or reduce the hot brittleness caused by oxygen and sulfur, greatly improve the thermal processing performance of steel, and can improve the strength and hardness of steel. Manganese is the main alloying element in China's low-alloy structural steels.

4. phosphorus. Phosphorus is a very harmful element in steel. With the increase of phosphorus content, the strength, yield ratio and hardness of the steel are all increased, while the plasticity and toughness are significantly reduced. In particular, the lower the temperature, the greater the effect on plasticity and toughness, significantly increasing the cold brittleness of the steel. Phosphorus also significantly reduces the weldability of steel materials. However, phosphorus can improve the wear resistance and corrosion resistance of steel, so it can be used as alloying elements in other alloys in low alloy steels.

5. sulfur. Sulfur is a very harmful element in steel. The presence of sulfur will increase the hot brittleness of the steel, reduce the various mechanical properties of the steel, and also reduce the weldability, impact toughness, fatigue resistance and corrosion resistance of the steel.

6 . titanium. Titanium is a strong deoxidizer. Titanium can significantly improve strength, improve toughness, weldability, but slightly reduce the plasticity. Titanium is a commonly used trace alloy element.

7 . vanadium. Vanadium is a weak deoxidizer. Vanadium added to the steel can reduce the adverse effects of carbon and nitrogen, and effectively increase the strength, but sometimes it also increases the tendency of weld hardening. Vanadium is also a commonly used trace alloy element.

Nanjing Kirin Scientific Instrument Group Co., Ltd.

Testing Center

2016.0 6.24

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