Dynamic control method for heating process of niobium containing steel
A dynamic control and heating process technology, applied in heat treatment process control, manufacturing tools, heat treatment equipment, etc., can solve the problems of inaccurate control and waste of energy in the heating process of microalloy steel, achieve precise control, reduce waste, and ensure heating quality Effect
Active Publication Date: 2019-01-04
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
It is used to solve the problem that the heating process of the existing micro-alloyed steel cannot be precisely controlled and the energy is wasted seriously
Method used
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[0072] In this embodiment, the method of the present invention is further described in detail by taking the main chemical components of the continuous casting slab shown in Table 1 as an example. Since the slab temperature and solid solution corresponding to the head, middle and tail are calculated in the same way, the difference is only in the boundary conditions used for the calculation. The following embodiments only output the calculation results of the middle part of the slab.
[0073] Table 1
[0074] element name
C
Si
mn
N
Nb
content%
0.068
0.43
1.5
0.0036
0.0485
[0075] According to step 1, calculate the solid solution soaking temperature of microalloyed niobium, the target solid solubility of microalloyed niobium is 100%; where W Nb =0.0485,W N =0.0036, W C =0.068; carbon vacancy coefficient k is 0.875; constants A1=2.97, B1=7500, A2=2.80, B2=8500; the relative atomic masses of niobium, carbon and nitrogen are:...
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The invention relates to a dynamic control method for a heating process of niobium containing steel. The control method comprises the steps that the solid solution soaking temperature of micro-alloy niobium in billet steel is determined according to actual chemical compositions of the billet steel, alternating coupling calculation is performed by adopting a billet steel temperature calculation model and a micro-alloy carbide solid solution degree model, billet steel temperature distribution and a solid solution distribution condition of the micro-alloy niobium at a corresponding position are dynamically tracked to achieve the visualization of the heating process, thereby guiding the heating process, ensuring the heating quality, fully exerting the strengthening effect of the micro-alloy crucible, reducing the energy waste as much as possible and achieving the precise control of the heating process of the micro-alloy billet steel. The problems that the heating process of existing micro-alloy steel cannot be accurately controlled and the energy is seriously wasted are solved.
Description
technical field [0001] The invention relates to the technical field of metallurgical production, in particular to a dynamic control method for the heating process of niobium-containing steel. Background technique [0002] Fine-grain strengthening and precipitation strengthening are the two most important strengthening methods to improve the mechanical properties of steel products. Adding microalloys is the most effective way to achieve these two strengthening methods. Among them, niobium microalloys are due to their stable metallurgical effect and reasonable price. , are widely used. [0003] The basic process of microalloying is solid solution first and then precipitation. Among them, solid solution is the key, and the solid solution of microalloy is closely related to the control of heating process. The soaking temperature of the heating process and the actual chemical composition of steelmaking directly affect the effect of solid solution. If the heating temperature is...
Claims
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Login to View More IPC IPC(8): C21D1/34C21D11/00
CPCC21D1/34C21D11/00
Inventor 吕立华邓龙刘运华王彦峰张勇
Owner BAOSHAN IRON & STEEL CO LTD