A production method of thin-gauge pickling and annealing tool steel

A production method and tool steel technology, applied in the field of tool steel manufacturing, can solve the problems affecting the fatigue resistance of tool steel, etc., and achieve the effects of improving production efficiency and profitability, improving single-pass reduction rate and uniform temperature distribution

Active Publication Date: 2017-04-12
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method does not require the spheroidizing annealing process, and the thin-gauge tool steel produced has the characteristics of light segregation and good structure uniformity. The thickness of the tool steel is 1.0-2.5mm, but the thickness of the decarburized layer exceeds 1% of the thickness of the steel plate. , affecting the fatigue resistance of tool steel

Method used

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  • A production method of thin-gauge pickling and annealing tool steel
  • A production method of thin-gauge pickling and annealing tool steel
  • A production method of thin-gauge pickling and annealing tool steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] What the present embodiment produces is tool steel SK95, and its production steps are:

[0038] (1) Converter smelting: adopt 150t converter smelting;

[0039] (2) LF refining: LF refining is used after converter smelting. The main chemical components of the refined molten steel are C: 0.95wt.%, Si: 0.20wt.%, Mn: 0.15wt.%, P: 0.015wt.%, S: 0.003wt.%, Cr: 0.15wt.%, the rest are Fe and unavoidable impurities;

[0040] (3) Continuous casting: continuous casting after LF refining, control casting speed to 5.0m / min, superheat of molten steel to 11°C, casting slab liquid core depression to 10mm;

[0041] (4) Soaking: the slab is soaked, the temperature of the slab entering the furnace is 1050°C, the control soaking temperature is 1150°C, and the soaking time is 30min;

[0042] (5) continuous hot rolling: the slab after soaking is carried out hot continuous rolling, and the control finish rolling temperature is 880 ℃;

[0043] (6) Cooling: cooling the slab after hot continu...

Embodiment 2

[0053] What the present embodiment produces is the production method of tool steel SK85, and its production steps are:

[0054] (1) Converter smelting: adopt 150t converter smelting;

[0055] (2) LF refining: LF refining is used after converter smelting. The main chemical components of the refined molten steel are C: 0.85wt.%, Si: 0.30wt.%, Mn: 0.40wt.%, P: 0.018wt.%, S: 0.04wt.%, Cr: 0.40wt.%, the rest are Fe and unavoidable impurities;

[0056] (3) Continuous casting: continuous casting after LF refining, control casting speed to 3.6m / min, superheat of molten steel to 29°C, casting slab liquid core depression to 19mm;

[0057] (4) Soaking: the slab is soaked, the slab entering furnace temperature is 850°C, the soaking temperature is 1165°C, and the soaking time is 34min;

[0058] (5) continuous hot rolling: the slab after soaking is carried out hot continuous rolling, and the control finish rolling temperature is 855 ℃;

[0059] (6) Cooling: cooling the slab after hot con...

Embodiment 3

[0069] What the present embodiment produces is the production method of tool steel C75S, and its production steps are:

[0070] (1) Converter smelting: adopt 150t converter smelting;

[0071] (2) LF refining: LF refining is used after converter smelting. The main chemical components of the refined molten steel are C: 0.75wt.%, Si: 0.25wt.%, Mn: 0.45wt.%, P: 0.015wt.%, S: 0.005wt.%, Cr: 0.20wt.%, the rest are Fe and unavoidable impurities;

[0072] (3) Continuous casting: continuous casting after LF refining, control casting speed to 3.9m / min, superheat of molten steel to 24°C, casting slab liquid core depression to 16mm;

[0073] (4) Soaking: the slab is soaked, the temperature of the slab entering the furnace is 1000°C, the control soaking temperature is 1125°C, and the soaking time is 29min;

[0074] (5) continuous hot rolling: the slab after soaking is carried out hot continuous rolling, and the control finish rolling temperature is 869 ℃;

[0075] (6) Cooling: cooling t...

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Abstract

The invention relates to a production method for thin pickling and annealing tool steel. The production method comprises the steps of smelting, refining, continuous casting, uniform heating, hot continuous rolling, cooling, reeling, warehousing and slow cooling, pickling, annealing and leveling. The production method is used for producing thin, high-formability and thin-decarburized-layer tool steel; and an obtained product has excellent surface quality and easy-to-form mechanical property, and can be directly subjected to cold rolling, so that follow-up manufacturing processes and production cost are reduced for a user, environment-friendly problems caused by pickling are relieved for the user, and yield and profitability are further improved.

Description

technical field [0001] The invention belongs to the technical field of tool steel manufacture, and in particular relates to a production method of thin-gauge pickling and annealing tool steel. Background technique [0002] The carbon content of tool steel is generally above 0.7%. After heat treatment, it has good strength, hardness, wear resistance and certain toughness. It can be used to manufacture various cutting tools, measuring tools, precision hardware tools and forming tools. It is widely used in automobiles, In construction machinery, electronics and other fields, the thinner the thickness of the steel strip (the thinnest reaches 0.05mm), the higher the dimensional accuracy and the higher the market price. Therefore, thin-gauge tool steel has good profit prospects. [0003] At present, the production of tool steel hot-rolled steel strip is mainly based on narrow strip or traditional hot rolling. The narrow strip has poor dimensional accuracy, large fluctuations in c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04B21C37/04C22C38/18
CPCB21C37/04C22C33/04C22C38/02C22C38/04
Inventor 蔡珍韩斌毛新平谭文何亚元甘晓龙孙宜强
Owner 武汉钢铁有限公司
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