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Heat treatment method for cold-rolled steel strip

A heat treatment method and cold-rolled steel strip technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of imperfect surface quality, less material utilization, and large gaps in the cover, so as to reduce heat and reduce energy consumption , cost-saving effect

Inactive Publication Date: 2010-07-28
扬州市为政五金冷轧有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to reduce the energy consumption in the heat treatment process, the applicant has developed a new type of annealing hood. It uses less materials and consumes less energy in the annealing hood itself. However, due to its large volume and large gaps in the hood, the sealed hood contains oxygen. If the amount is high, there will still be a small amount of oxidation, making the surface quality of the product not perfect

Method used

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  • Heat treatment method for cold-rolled steel strip
  • Heat treatment method for cold-rolled steel strip
  • Heat treatment method for cold-rolled steel strip

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Embodiment Construction

[0012] Such as figure 1 , 2 As shown, the method of the present invention uses a furnace 5, a trolley 1, and a shield as heat treatment equipment. The shield includes a bell-shaped stainless steel cover 4 and a disc-shaped base 2. The shield connects the The cold-rolled steel strip 7 is sealed in it (the sand seal groove 3 is used to realize the sealing between the cover body 4 and the base 2), and the whole is placed on the trolley 1, and then enters the furnace 5, the bottom surface of the base 2 in the protective cover There are labyrinth grooves 8 communicating with each other, and magnesium, aluminum or zinc metal particles 9 are placed in the grooves 8.

[0013] After entering the kiln 5 with the whole protective cover containing the cold-rolled strip steel 7, it is heated to 900-910°C and kept for 20-24 hours; then, the fire is stopped, and it is allowed to stand in the kiln 5 for 18-20 hours; then, Exit the kiln 5, place it still in an environment of 10-30°C, and cool to ...

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Abstract

The invention discloses a heat treatment method for cold-rolled steel strip. The invention relates to a heat treatment method for cold-rolled steel strip. A furnace, a bogie and a shield are used as heat treatment equipment, the shield comprises a bell jar-shaped stainless shield body and a disk-like base, the shield seals the cold-rolled steel strip therein and is then entirely placed on the bogie which enters into the furnace, a bottom surface of the base in the shield is provided with labyrinth grooves which are communicated with each other and in which metal powders of magnesium, aluminum or zinc are put. Due to high heating temperature and large volume of the shield, residual oxygen inside the shield causes micro oxidation of the steel strip, therefore, according to the invention, some active metals and metal powders of magnesium, aluminum or zinc are placed inside the shield, and the metal powders can be reacted with residual oxygen in advance or simultaneously in order to avoid or reduce the influence of the residual oxygen on products.

Description

Technical field [0001] The invention relates to an annealing process of cold-worked steel strip, in particular to a heat treatment method of cold-rolled steel strip. Background technique [0002] With the advent of the era of production specialization, many manufacturers have higher and higher requirements for raw materials in order to minimize the waste of scraps. Cold-rolled strip steel can be used as the raw material for some pipe fitting processing plants to produce straight seam pipe fittings, and it can also be used as the raw material for hardware and structural parts processing plants to produce hardware and structural parts. These manufacturers can directly cut the strip steel to meet their processing requirements. Waste. Therefore, the market urgently needs cold-rolled strip steel with good mechanical properties, good surface effects and meeting user specifications. [0003] The processing process of cold-rolled strip steel is: hot-rolled billet---shelling---pickling---...

Claims

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Application Information

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IPC IPC(8): C21D9/52C21D1/26
Inventor 花为政
Owner 扬州市为政五金冷轧有限公司
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