Method for producing titanium-microalloyed steel based on completely endless thin-slab continuous casting and continuous rolling process

A technology of thin slab continuous casting and micro-alloy steel, which is applied in the direction of metal rolling, can solve the problems of high energy consumption and high cost, and achieve the effects of energy saving, low cost and short production process

Active Publication Date: 2017-10-24
RIZHAO STEEL HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a method for producing titanium microalloy steel based on the full endless thin slab continuous casting and rolling process, so as to solve the problems of high cost and large energy consumption of the traditional method for producing titanium microalloy steel, To achieve the purpose of energy saving, environmental protection and cost reduction

Method used

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  • Method for producing titanium-microalloyed steel based on completely endless thin-slab continuous casting and continuous rolling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Select raw materials, wherein the raw materials include: 0.04% C, 0.15% Si, 0.93% Mn, 0.008% S, 0.012% P, 0.025% Al, 0.016% Ti, 0.004% N by mass percentage, and the rest are iron element;

[0046] The raw materials are smelted in converter and LF furnace in turn;

[0047] The continuous casting is produced at a constant casting speed of 5.4m / min, and the hot-rolled strip steel with a thickness of 1.8mm is produced through the all-endless thin slab continuous casting and rolling production line. 1150°C, finish rolling outlet temperature 845°C, coiling temperature 630°C, the coiler is rolled into the warehouse;

[0048] The mechanical properties of the generated titanium micro-alloyed steel are: the yield strength is 414MPa, the tensile strength is 504MPa, and the elongation is 30%.

Embodiment 2

[0050] Select raw materials, wherein the raw materials include: 0.05% C, 0.25% Si, 1.0% Mn, 0.006% S, 0.013% P, 0.020% Al, 0.025% Ti, 0.003% N, and the rest are iron element;

[0051] The raw materials are smelted in converter and LF furnace in turn;

[0052] The continuous casting is produced at a constant casting speed of 5.0m / min, and the hot-rolled strip steel with a thickness of 1.5mm is produced through the all-endless thin slab continuous casting and rolling production line. The rough rolling inlet temperature is 915°C, and the induction heating furnace outlet temperature 1155°C, finish rolling exit temperature is 850°C, coiling temperature is 600°C, the coiler is coiled into the warehouse;

[0053] The mechanical properties of the generated titanium microalloy steel are: the yield strength is 430MPa, the tensile strength is 519MPa, and the elongation is 32%.

Embodiment 3

[0055] Select raw materials, wherein the raw materials include: 0.055% C, 0.30% Si, 1.10% Mn, 0.008% S, 0.014% P, 0.025% Al, 0.030% Ti, 0.004% N by mass percentage, and the rest are iron element;

[0056] The raw materials are smelted in converter and LF furnace in turn;

[0057] The continuous casting is produced at a constant casting speed of 5.5m / min, and the hot-rolled strip steel with a thickness of 2.0mm is produced through the all-endless thin slab continuous casting and rolling production line. The rough rolling inlet temperature is 925°C, and the induction heating furnace outlet temperature is 1150°C, finish rolling exit temperature is 845°C, coiling temperature is 620°C, the coiler is rolled into the warehouse;

[0058] The mechanical properties of the generated titanium microalloy steel are: the yield strength is 436MPa, the tensile strength is 527MPa, and the elongation is 27.5%.

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Abstract

The invention provides a method for producing titanium-microalloyed steel based on completely endless thin-slab continuous casting and continuous rolling process. The method comprises the following steps of: selecting raw materials which comprise 0.04-0.10% of C, 0.10-0.50% of Si, 0.60-1.20% of Mn, 0.020-0.040% of Al, 0.010-0.040% of Ti, less than or equal to 0.01% of S, less than or equal to 0.025% of P, less than or equal to 0.005% of N and the balance being an iron element according to the mass percentage; carrying out converter smelting and LF (ladle furnace) smelting on the raw materials in sequence; and carrying out completely endless thin-slab continuous casting and continuous rolling on molten steel formed through LF smelting to produce hot rolled strip steel with different thicknesses, wherein in the completely endless thin-slab continuous casting and continuous rolling production line, the inlet temperature of rough rolling is greater than or equal to 900 DEG C, the outlet temperature of an induction heating furnace is 1100-1180 DEG C, the outlet temperature of finish rolling is 830 DEG C-900 DEG C, and the rolling temperature is 580-640 DEG C. The method solves the problems of high cost, high energy consumption and the like existing in a traditional technological method for producing the titanium-microalloyed steel and achieves the purposes of energy conservation, environmental protection and cost reduction.

Description

technical field [0001] The invention relates to the technical field of metal material processing and forming, and more specifically, relates to a method for producing titanium microalloy steel based on a full-endless thin slab continuous casting and rolling process. Background technique [0002] Full-endless thin slab continuous casting and rolling refers to the endless strip steel process, which realizes the full continuous production from molten steel to hot-rolled coils on the coiler within 7 minutes, realizing continuous casting and rolling in the true sense. This technology has the characteristics of high purity of molten steel, fast solidification speed of cast slab, uniform as-cast structure, small chemical composition segregation, short rolling time, large pass reduction, uniform finished structure, etc., and this process does not require belt threading, The hot-rolled coil has uniform thickness throughout the length and high dimensional accuracy. [0003] Micro-all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/14B21B1/46
Inventor 季长恩赵锐张相祥郑万任赵寿云张保菊刘宏志王福良谢国海于长江安宝林张若英闫磊周扬收
Owner RIZHAO STEEL HLDG GROUP
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