Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device

A technology for a cold-rolled steel strip and a production method, which are applied in the field of anode plate materials for steel-making electrostatic precipitators and the production process thereof, can solve problems such as poor annealing uniformity, residual emulsion oxidation, etc., achieve simple production equipment, and improve surface roughness. , the effect of preventing collapse

Active Publication Date: 2014-11-26
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a cold-rolled steel strip and its production method. Using high-temperature-resistant hot-rolled coils as raw materials, it is possible to produce a cold-rolled steel strip with a thickness deviation within 0.12mm and excellent performance, so that it can It is used as anode plate material for steelmaking electric dust removal device; in addition, it saves the alkali cleaning process, avoids the problems of steel coil collapse, bonding, poor annealing uniformity and residual emulsion oxidation in the coil horizontal annealing process, and the production method is simple , low production cost

Method used

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  • Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device
  • Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device
  • Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The hot-rolled coil blank used in this embodiment is 13CrMo44 steel grade, purchased from Shanxi Taigang Stainless Steel Co., Ltd. In the embodiment, the size of the hot-rolled coil billet is 3.5mm*1150mm, and the length is determined according to the needs. Yield strength 380MPa, tensile strength 500MPa, elongation 30%.

[0076] In this embodiment, four pickling tanks are used for pickling, using hydrochloric acid solution as the pickling liquid, the pickling speed is: 20m / min, and the conventional ion titration method is used to control Fe +2 ≤160mg / L, if Fe in hydrochloric acid solution 2+ When >160mg / L, replace the hydrochloric acid solution in the pickling tank. The specific pickling process of each tank is shown in Table 1.

[0077] Table 1

[0078]

1#

2#

3#

4#

Hydrochloric acid solution temperature

77℃

77℃

75℃

75℃

Concentration of hydrochloric acid solution (mass)

4.5％

7％

...

Embodiment 2

[0091] Example 2 adopts basically the same process conditions as in Example 1, and the changed parameters are shown in Table 3 pickling process parameters, Table 4 rolling process parameters, and Table 5 annealing process parameters.

[0092] table 3

[0093]

[0094] Table 4

[0095]

[0096] table 5

[0097]

[0098] The shape of the steel coil in this embodiment has no collapse, and the unevenness is ≤8mm / m. Except for the first circle of blue oxidation on the inside and outside of the steel coil, the others are free of oxidation (whole coil empty coil inspection). Using the sampling method of the national standard GB / T2975, the mechanical property testing method of GB / T228, and the equipment of GB / T16825, the following results are obtained:

[0099] The fifth circle of steel coil head ReL / Rm / A%=325 / 460 / 37,

[0100] Middle part of steel coil ReL / Rm / A%=345 / 480 / 33

[0101] ReL / Rm / A%=325 / 460 / 37 for the tenth circle at the end of the steel coil.

[0102] Full facto...

Embodiment 3

[0104] In this embodiment, the size of the hot-rolled coil billet is 2.9mm*1240mm, and the length is determined according to the needs. Yield strength 380MPa, tensile strength 500MPa, elongation 30%.

[0105] Example 3 adopts basically the same process conditions as in Example 1, and the changed parameters are shown in Table 6 Pickling Process Parameters, Table 7 Rolling Process Parameters, and Table 8 Annealing Process Parameters.

[0106] Table 6

[0107]

[0108] After the pickling treatment, the hot-rolled coil is trimmed, and the trimmed size is 2.9mm*1215mm.

[0109] Table 7

[0110]

[0111] Table 8

[0112]

[0113] Get the product specification (1.5±0.05mm)*1200. The shape of the steel coil in this embodiment has no collapse, and the unevenness is ≤8mm / m. Except for the first circle of blue oxidation on the inside and outside of the steel coil, the others are free of oxidation (whole coil empty coil inspection). Using the sampling method of the national...

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Abstract

The invention provides a cold-rolled steel strip and a production method thereof, and an anode plate material for an electric dust removing device. The method comprises the following steps of: 1, washing a hot-rolled coil blank by using an inorganic acid solution in an acid-washing tank; 2, rolling the acid-washed hot-rolled coil blank by using a rolling mill at the speed of 200 to 300m / min to obtain a steel coil of which the thickness reduction is less than or equal to 50 percent, wherein the unit front tension of a finished product pass is not less than 8kg / mm<2>; and 3, performing secondary constant-temperature annealing treatment on the rolled steel coil, heating to the temperature of between 550 and 630 DEG C, preferably 620 DEG C, at the rate of less than 20 DEG C / h, keeping the constant temperature for 3.5 to 4.5 hours, preferably 4 hours, continuously heating to the temperature of between 660 and 720 DEG C, preferably 670 DEG C, at the rate of less than 20 DEG C / h, and keeping the constant temperature for 6 to 10 hours, preferably 8 hours. By the method, the cold-rolled steel strip with the thickness deviation of less than 0.12mm and superior performance can be produced and can be used as the anode plate material for the steelmaking electric dust removing device.

Description

technical field [0001] The invention relates to a cold-rolled steel strip (steel coil) and a production method thereof, in particular to an anode plate material for a steelmaking electric dust removal device and a production process thereof. Background technique [0002] Cold-rolled steel strip is made of hot-rolled coil as raw material, which is pickled, rolled and annealed. Cold-rolled steel has good properties, and cold-rolled steel strips of a certain thickness can be obtained through cold-rolling. In addition, it has a wide range of uses, mainly used in automobiles, printed iron drums, construction, building materials, bicycles and other industries, and it is also the best material for the production of organic coated steel plates. [0003] Nowadays, anode plates for electric furnaces and converter electrostatic precipitators of steelmaking equipment need to be made of cold-rolled steel strip materials with high dimensional accuracy and high temperature resistant alloy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/28C21D1/26C21D9/52C23G1/08B03C3/47
Inventor 贾成义郝月明曹永录党阳李杰
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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