Method for smelting microalloyed steel
A micro-alloy steel and micro-alloy technology, applied in the field of smelting micro-alloy steel, can solve the problems of large fluctuations in steel performance, poor performance matching of micro-alloy steel, and poor process stability, etc., to achieve easy realization, Improves the strengthening effect and calms the effect of sensitivity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0041] (1) Select vanadium nitride and ferrovanadium nitride alloy reinforcing agent (ie, microalloying reinforcing agent), the composition of which is (all in mass fraction, the same below): N: 37%, Si: 23%, Mn: 17.5% , Al: 5.6%, Cr: 7.3%, C: 0.1%, P: 0.07%, S: 0.06%, the balance is Fe and trace impurities, broken into small particles of 0.01 ~ 4.5mm;
[0042] (2) Choose a bright steel strip, its composition C: 0.07%, Si: 0.09%, Mn: 0.032%, P: 0.018%, S: 0.021%, Al: 0.08%, the balance is Fe, and the thickness is 0.55mm, The above scores are quality scores;
[0043] (3) the small particles obtained by crushing in step (1) and the steel strip in step (2) are coated with a cored wire unit into cored wire;
[0044] (4) Select vanadium nitride alloy, its composition is: V: 76%, N: 17%, C: 5.5%, P: 0.04%, S: 0.10%, and its particle size: 5-40mm.
[0045] (5) The micro-alloy reinforcing agent cored wire processed and formed in the step (3) and the vanadium nitride alloy select...
Embodiment 2
[0060] (1) Select the microalloy reinforcement, the composition of which is (all in mass fraction, the same below): N: 11%, Si: 66%, Mn: 0.1%, Ti: 9.6%, Al: 0.03%, C: 1.9%, P: 0.10%, S: 0.15%, the balance is Fe and trace impurities, particle size 3 ~ 25mm;
[0061] (2) Select nitrogen vanadium alloy, its composition V: 79%, N: 15.5%, C: 4.1%, P: 0.03%, S: 0.07%, particle size 5 ~ 30mm;
[0062] (3) Using the microalloy reinforcing agent selected in step (1) and the vanadium nitride alloy selected in step (2) in the process of deoxidation and alloying of molten steel for converter steelmaking.
[0063](4) Select a converter with a nominal capacity of 120 tons, and the smelting steel is 20MnSi. The process is as follows: (a) Converter smelting: pre-desulfurization of molten iron, desulfurization of molten iron to below 0.035%, smelting with lime and sintered ore, Regenerate new slag after turning down the furnace once to remove slag. (b) Tapping at the end of the converter (th...
Embodiment 3
[0076] (1) Select the microalloy reinforcement, the composition of which is (all in mass fraction, the same below): N: 26.5%, Si: 43.2%, Mn: 3.8%, Al: 0.4%, C: 0.3%, Ti: 9.5%, P: 0.040%, S: 0.036%, the balance is Fe and trace impurities, broken into small particles of 0.01 ~ 3.5mm;
[0077] (2) Select vanadium nitride alloy, whose composition is V: 77.2%, N: 14%, C: 3.3%, P: 0.04%, S: 0.06%, and the particle size is 0.01-3mm.
[0078] (3) Mix the microalloy reinforcing agent particles selected in step (1) and step (2) together with vanadium nitride particles to make a ball compact, and its composition is: Si: 8.2%, Mn: 0.8%, N : 16.1%, Al: 0.1%, C: 2.3%, Ti: 5.1%, V: 60.1%, P: 0.041%, S: 0.010%, the balance is Fe and a small amount of impurities, and its particle size is 5-45mm.
[0079] (4) The microalloy reinforcing agent and the vanadium nitride spherical block material processed and formed in the step (3) are used in the process of deoxidation and alloying of molten steel...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
| yield strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More