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Titanium-containing acid pickling plate and preparation method thereof

A technology of plate washing and titanic acid, which is applied in the field of iron and steel smelting, can solve the problems of deteriorating steel plate performance and difficulty in controlling the precision of boron composition, and achieve the effects of eliminating the yield platform, increasing the original movable dislocation density, and reducing production costs

Active Publication Date: 2016-03-30
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Boron is added in this patent, and it is difficult to control the accuracy of the composition of boron, and when the boron content is high, the steel plate will be brittle and deteriorate the performance of the steel plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The above-mentioned method for preparing a titanium-containing pickled plate mainly includes the following steps: steel billet → hot rolling → laminar cooling → coiling → pickling;

[0025] Among them, the start rolling temperature of the finish rolling in the hot rolling step is 950-1050°C, the finishing rolling temperature in the hot rolling step is 830-900°C; the coiling temperature is 540-598°C; the tensile elongation in the pickling step is 0.8-3.0%.

[0026] Further, as a more preferred technical solution, in the above-mentioned method for preparing a titanium-containing pickled plate, the starting temperature of the finish rolling in the hot rolling step is 952-1048° C., and the finishing rolling temperature in the hot rolling step is 834-1048° C. 897°C; the coiling temperature is 545-598°C; the tensile elongation in the pickling step is 0.8-2.5%.

[0027] Further, as a more preferred technical solution, in the above-mentioned method for preparing a titanium-con...

Embodiment 1

[0035] The weight percent of the chemical composition of the billet is: C: 0.01%, Si: 0.01%, Mn: 0.39%, P: 0.015%, S: 0.009%, Ti: 0.025%, and the rest is Fe and unavoidable impurities.

[0036] The preparation method of titanium-containing pickled plate mainly includes the following steps: billet → hot rolling → laminar cooling → coiling → pickling:

[0037] Among them, the finish rolling start temperature in the hot rolling step is 952°C, the finish rolling temperature in the hot rolling step is 834°C; the temperature in the coiling step is 545°C; the tensile elongation in the pickling step is 0.8%.

[0038] The mechanical properties of the titanium-containing acid-washed plate produced by the method Rel: 192MPa, Rm: 300MPa, A%: 50%; the surface quality is good.

Embodiment 2

[0040] The weight percent of the chemical composition of the billet is: C: 0.03%, Si: 0.03%, Mn: 0.20%, P: 0.013%, S: 0.008%, Ti: 0.012%, and the rest is Fe and unavoidable impurities.

[0041] The preparation method of titanium-containing pickled plate mainly includes the following steps: billet → hot rolling → laminar cooling → coiling → pickling:

[0042] Among them, the finish rolling start temperature in the hot rolling step is 1005°C, the finish rolling temperature in the hot rolling step is 872°C; the temperature in the coiling step is 575°C; the tensile elongation in the pickling step is 1.9%.

[0043] The mechanical properties of the titanium-containing acid-washed plate produced by the method Rel: 214MPa, Rm: 319MPa, A%: 49%; the surface quality is good.

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Abstract

The invention belongs to the field of steel and iron smelting and particularly relates to a titanium-containing acid pickling plate and a preparation method thereof. The titanium-containing acid pickling plate is prepared from, by weight, not larger than 0.05% of C, not larger than 0.05% of Si, not larger than 0.40% of Mn, not larger than 0.025% of P, not larger than 0.025% of S, not larger than 0.03% of Ti and the balance Fe and inevitable impurities. The invention provides the titanium-containing acid pickling plate excellent in performance and the preparation method of the titanium-containing acid pickling plate. Mainly, by controlling the rolling, cooling and acid pickling tension leveling technology of the titanium-containing acid pickling plate, on one hand, an acid pickling plate yield platform is effectively eliminated, on the other hand, original mobile dislocation density is increased, and therefore the cross break defect of the acid pickling plate lower in yield strength is inhibited. The beneficial effects of being simple in method, low in production cost and excellent in product performance and welding performance are achieved.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a titanium-containing pickled plate and a preparation method thereof. Background technique [0002] The pickling plate is made of high-quality hot-rolled sheet as raw material. The pickling unit removes the oxide layer, trims the edge, and finishes. The main processes include hot-rolled raw material decoiling→laser welding→phosphorus breaking by the tension-leveling unit→turbulent pickling→rinsing→ On-line leveling→edge trimming→on-line oiling→baling→packing and storage, its surface quality and use requirements are between hot-rolled and cold-rolled sheets, and it is an ideal substitute for some hot-rolled and cold-rolled sheets. [0003] The titanium-containing pickling plate is to add a certain amount of titanium alloy to the ordinary pickling plate. The main function is to fix the C and N interstitial atoms in the low carbon steel, and the other function is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C22C38/04C21D8/02C23G1/08
CPCC21D8/0226C22C38/04C22C38/14C23G1/08
Inventor 李正荣寄海明汪创伟陈天荣王羿赵国英王登刚
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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