Tel: +86-372-3175078
E-mail: aydwyj@dwyjgs.com

Contact
ATTN: Li Xin
E-MAIL: aydwyj@dwyjgs.com
TEL: +86-372-3175078
Address: West Of Mengjia Village Road, Longqu Road, Long'an District, Anyang City, Henan Province

Steelmaking Metallurgical Iron Silicon Chip Steelmaking Metallurgical

     What is the basic task of steelmaking, through which means to achieve?Steelmaking Metallurgical 

    (Adjust the composition and temperature), the main technical means used: oxygen, slagging (decarbonization, oxygen, phosphorus, sulfur); two to (to gas and to inclusions); two adjustments (adjust the composition and temperature) , Temperature, plus deoxidizer and alloying operation 7 - 2 phosphorus and sulfur on steel what harm? Phosphorus: Causes cold and brittle steel, plasticity and impact toughness of steel, reduce the surface tension of steel, and make the welding performance of steel and cold bending performance deterioration.Steelmaking Metallurgical 

    Sulfur: the hot steel red performance deterioration, causing hot brittle steel. Reduce the welding performance of steel, causing high temperature cracking. Sulfur or continuous casting in the most serious segregation of the elements. Why should we control ω [Mn] / ω [S] as an indicator in actual production? A: Mn generates MnS and a small amount of FeS in the solidification range of the steel. (Mn) / ω (S) ratio as an index to control, to improve the ω (Mn) / ω (S), can improve the steel production of the hot Ductility, when ω (Mn) / ω (S) ≧ 7 does not produce hot brittle. What are the hazards of hydrogen and nitrogen to steel?Steelmaking Metallurgical 

    Hydrogen in the solid steel solubility is very small, in the molten steel coagulation and cooling process, the hydrogen and carbon monoxide, nitrogen and other gases together to form a subcutaneous bubble center shrinkage, loose, resulting in white spots and hairline. During the hot working process, the pores of the steel in the steel are elongated along the processing direction to form the fissure, which leads to the decrease of the strength, plasticity and impact toughness of the steel, that is, the phenomenon of "hydrogen embrittlement". The nitrogen in the steel is in the form of a nitride, and his effect on the quality of the steel reflects a duality. High nitrogen content of steel placed for a long time, will become brittle, this phenomenon is called "aging" or "aging" because the precipitation rate of nitrides in steel is very slow, gradually changing the performance of steel. Low carbon steel produced by the brittle than phosphorus is also serious. Steel nitrogen content is high, in the 250-450 degrees Celsius temperature range, the surface blue, steel stiffness increases, impact toughness decreased, known as the "blue brittle." Nitrogen content increased, the welding performance of steel deteriorated. 7 - 5 steel in the inclusions is how to produce, what impact on the performance of steel? A: ① smelting and pouring process, into the molten steel slag and refractory materials and molten steel is oxidized by the formation of oxidation products. Deoxygenated deoxidized product. ③ As the temperature of the molten steel decreases, the solubility of S, O, N and other impurity elements decreases, so that these insoluble impurities are precipitated in the steel by non-metallic compounds. ④ solidification process due to reduced solubility, segregation and reaction products. The presence of nonmetallic inclusions in the steel is generally considered to be harmful. The main performance of the steel strength, ductility, toughness, fatigue and other aspects of the impact.Steelmaking Metallurgical