Hot rolled steel in C-Mn-Ti series with high intensity magnetic induction performance

Abstract

The invention discloses a method for manufacturing C-Mn-Ti series hot-rolled high-strength and high-magnetism performance steel, which relates to the field of micro-alloyed steel manufacturing. In order to solve the problems of higher cost and greater damage to rolling and coiling equipment in the prior art, the weight percentage of each component of the hot-rolled high-strength and high-magnetic-sensitivity steel described in the present invention is C: 0.03 %~0.15%, Si: ≤0.15%, Mn: 0.50%~1.40%, P: ≤0.025%, S: ≤0.015%, Ti: 0.05%~0.15%, Al: 0.02%~0.10%, N: ≤ 0.010%, the rest is Fe. Its manufacturing method is carried out according to the following steps: a. Desulfurization of molten iron; b. Combined blowing on the top and bottom of the converter; c. Treatment with argon blowing after the furnace; d. Hot continuous rolling mill equipment, first heat the slab prepared in step d to 1230-1280°C; then rough rolling, the finishing temperature of rough rolling is ≥1100°C; then finish rolling, the final rolling temperature is 850-930°C; steel plate After rolling, adopt laminar flow cooling and then coil, and the coiling temperature is 580-650°C to obtain hot-rolled coils.

Description

technical field [0001] The invention relates to the field of micro-alloyed steel manufacturing, in particular to a high-strength (R eL ≥600MPa) and high magnetic induction performance steel manufacturing method. Background technique [0002] With the increasingly prominent contradiction between power supply and demand, clean, pollution-free and renewable hydropower has become an important measure to solve energy problems in our country. With the deepening of my country's western development, a large number of large-scale and giant hydropower projects of the Three Gorges level will start construction in the next few decades. These large-scale and giant hydropower projects all require large-scale hydropower generation with a single-unit capacity of 700,000 to 800,000 kilowatts. The unit, which puts forward the requirements of high strength and high magnetic induction performance for the steel used in the yoke of the generator rotor. Before the application of the present inven...

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Problems solved by technology

[0003] In order to solve the problems of high cost and large damage to rolling and coiling equipment in the prior art, the present invention provides a yoke that can meet the needs of the yoke in the rotor of a large hydroelectric generator with high unit capacity. Production method of C-Mn-Ti series high-strength and high-magnetic-sensitivity steel with yield strength ReL≥600MPa and magnetic induction performance B50≥1.5T

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