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A kind of medium and high carbon steel 65mn hot-rolled pickling plate and production method thereof

A hot-rolled pickling and production method technology, applied in the field of steel rolling, can solve the problems affecting the yield of pickled sheet products, and achieve the effects of no quality defects, reduced generation, and satisfying production requirements

Active Publication Date: 2021-08-17
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a medium-high carbon steel 65Mn hot-rolled pickling plate and its production method, aiming at solving the technology that the yield of pickling plate products is seriously affected by surface quality problems in the current production process of medium-high carbon steel 65Mn pickling plate question

Method used

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  • A kind of medium and high carbon steel 65mn hot-rolled pickling plate and production method thereof
  • A kind of medium and high carbon steel 65mn hot-rolled pickling plate and production method thereof
  • A kind of medium and high carbon steel 65mn hot-rolled pickling plate and production method thereof

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Embodiment 1

[0040]A medium-high carbon steel 65Mn hot-rolled pickling plate, according to weight percentage, its composition includes: C: 0.62%, Si: 0.10%, Mn: 0.95%, P: 0.013%, S: 0.01%, V: 0.02%, The rest is iron and unavoidable impurities; prepare a qualified slab with the above composition and go through 150 tons of converter vanadium extraction, 150 tons of converter smelting, LF refining, and slab continuous casting; place the slab in a heating furnace for heating, The heating temperature is 1200°C, and the heating time is 120 minutes. After the slab is released from the heating furnace, it is dephosphorized by high-pressure water. After 7 passes of the rolling mill, the outlet temperature is 860°C. After dispersive cooling, the coiling temperature is 690°C. The thickness is 2.0mm, the width is 1250mm, the yield strength is 435MPa, the tensile strength is 745MPa, and the elongation is 10%. Qualified medium and high carbon steel 65Mn hot-rolled pickling plate, no defects are found on...

Embodiment 2

[0042] A medium-high carbon steel 65Mn hot-rolled pickling plate is calculated by weight percentage, and its composition includes: C: 0.64%, Si: 0.12%, Mn: 0.98%, P: 0.015%, S: 0.012%, V: 0.03%, The rest is iron and unavoidable impurities; prepare a qualified slab with the above composition and go through 150 tons of converter vanadium extraction, 150 tons of converter smelting, LF refining, and slab continuous casting; place the slab in a heating furnace for heating, The heating time is 130 minutes, and the heating temperature is 1210°C. After the slab is released from the heating furnace, it is dephosphorized by high-pressure water. After finishing 7 passes of the rolling mill, the outlet temperature is 870°C. After dispersive cooling, the coiling temperature is 700°C, and the thickness is 6.0mm, the width is 1250mm, the yield strength is 455MPa, the tensile strength is 755MPa, and the elongation is 11%. Qualified medium and high carbon steel 65Mn hot-rolled pickling plate, ...

Embodiment 3

[0044] A medium-high carbon steel 65Mn hot-rolled pickling plate is calculated by weight percentage, and its composition includes: C: 0.65%, Si: 0.13%, Mn: 1.0%, P: 0.017%, S: 0.014%, V: 0.04%, The rest is iron and unavoidable impurities; prepare a qualified slab with the above composition and go through 150 tons of converter vanadium extraction, 150 tons of converter smelting, LF refining, and slab continuous casting; place the slab in a heating furnace for heating, The heating time is 150 minutes, and the heating temperature is 1230°C. After the slab is released from the heating furnace, it is dephosphorized by high-pressure water. After finishing 7 passes of the rolling mill, the outlet temperature is 890°C. After dispersive cooling, the coiling temperature is 720°C, and the thickness is 9.0mm, the width is 1250mm, the yield strength is 450MPa, the tensile strength is 760MPa, and the elongation is 12%. Qualified medium and high carbon steel 65Mn hot-rolled pickling plate, n...

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Abstract

The invention provides a medium-high carbon steel 65Mn hot-rolled pickled plate and a production method thereof, which belong to the technical field of steel rolling. The components of the medium-high carbon steel 65Mn hot-rolled pickled plate include: C: 0.62%-0.68%, Si: 0.1%~0.15%, Mn: 0.95%~1.1%, P≤0.020%, S≤0.018%, V:0.02~0.05%, the rest is iron and unavoidable impurities; its production method includes the following steps: preparing The slab is placed in a heating furnace to be heated, and then the phosphorus is removed by high-pressure water, and then the slab is rolled, cooled and coiled. In the present invention, a medium-high carbon steel 65Mn hot-rolled pickling plate adds vanadium to the steel to increase the strength, reduces the silicon content in the steel, and reduces the generation of scale through the control of temperature and time. After pickling, the surface quality is good and the surface is not rough. There are quality defects, which meet the production requirements of pickling boards.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and more specifically relates to a medium-high carbon steel 65Mn hot-rolled pickling plate and a production method thereof. Background technique [0002] Hot-rolled pickled sheet means that the hot-rolled coil is processed by the pickling unit to remove the oxide scale on the surface of the hot-rolled coil, and the surface is oiled to meet the use requirements of some cold-rolled sheets. The surface quality of the pickled sheet is higher , the dimensional accuracy is better controlled, and the price is lower than that of cold-rolled sheets, and the demand in the market is relatively large. [0003] Under normal conditions, the pickling plate mainly produces low-carbon steel, because the pickling plate has high requirements on the surface. Surface pickling quality of carbon steel 65Mn hot-rolled coils. After pickling of hot-rolled coils, the surface color will become dark, which will cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C21D8/02
CPCC21D8/0226C22C38/02C22C38/04C22C38/12
Inventor 梁静召田鹏陈国涛白银舰韩德文王源硕
Owner HEBEI IRON AND STEEL