Method and material frame for annealing cold-rolled plates of low-magnetic alloy structural steel

A cold-rolled sheet, annealing technology, applied in heat treatment equipment, furnaces, heat treatment furnaces, etc., to achieve the effects of low production cost, shortened annealing cycle, and reduced furnace loading

Active Publication Date: 2014-04-02
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 overcome the defect that cracks will appear in the cold-rolled steel plate with low magnetic bonding in the cold bending test, and to provide a low magnetic bonding The annealing method and annealing rack of steel cold-rolled steel plate are annealed by vertically installing the steel plate, and the surface hard layer will not be formed on the upper and lower surfaces of the steel plate, so that the quality defects of cold-bending cracks in the annealed steel plate are solved

Method used

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  • Method and material frame for annealing cold-rolled plates of low-magnetic alloy structural steel
  • Method and material frame for annealing cold-rolled plates of low-magnetic alloy structural steel
  • Method and material frame for annealing cold-rolled plates of low-magnetic alloy structural steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Cut the low magnetic bond steel cold-rolled slab blank into specifications of 7.0mm*1600mm*4700mm.

[0058] The sheared low magnetic bond steel plate is pickled, and the pickling process parameters are shown in Table 1.

[0059] Table 1

[0060] pickling medium Concentration% temperature °C Soaking time hydrochloric acid 11 30 11 minutes

[0061] Next, the low magnetic bond steel plate after the pickling treatment is subjected to rolling treatment, and the specific rolling treatment process parameters are shown in Table 2. The emulsion used is CMR-1 produced by Beijing Hengtong Lubricating Oil Co., Ltd. (its saponification value is 50, viscosity at V40°C is 45, flash point ≥ 150).

[0062] Table 2

[0063]

[0064] Then, the cold-rolled sheets after rolling were divided into stacks of 4 tons, and a total of 7 stacks were obtained. Then use the crane to hoist the cold-rolled plate stack to such as Figure 5 In the annealing rack...

Embodiment 2-3

[0067] Embodiments 2 and 3 adopt the same method as that of Embodiment 1, and the final product size is 5.0mm*1520mm*6000mm. The parameters changed in Embodiment 2 and 3 are shown in the table below. Table 3 is the pickling process that embodiment 2 and 3 adopt. Table 4 is the annealing process used in Examples 2 and 3.

[0068] table 3

[0069] pickling medium Concentration% temperature °C Soaking time Example 2 hydrochloric acid 8 40 15 minutes Example 3 hydrochloric acid 15 20 8 minutes

[0070] Table 4

[0071] Heating rate °C / h constant temperature ℃ Constant temperature time (hours) Example 2 20 750 6 Example 3 50 790 4

[0072] Using the above-mentioned test methods for mechanical properties, cold bending properties, and electromagnetic properties, the following results were obtained.

[0073] Table 5 Mechanical properties and cold bending test results

[007...

Embodiment 4

[0082] Cut the low magnetic bond steel cold-rolled slab blank into specifications of 6.0mm*1600mm*1950mm.

[0083] Then, the sheared low magnetic bond steel plate is pickled, and the process parameters of pickling are shown in Table 7.

[0084] Table 7

[0085] pickling medium Concentration% temperature °C Soaking time hydrochloric acid 11 30 11 minutes

[0086] Next, the low magnetic bond steel plate after the pickling treatment is rolled, and the specific rolling treatment process parameters are shown in Table 8. The emulsion used is CMR-1 produced by Beijing Hengtong Lubricating Oil Co., Ltd. (its saponification value is 50, viscosity at V40°C is 45, flash point ≥ 150).

[0087] Table 8

[0088]

[0089] Then, the rolled cold-rolled sheets were divided into stacks of 5 tons to obtain 6 stacks in total. Then use the crane to hoist to such as Figure 5 In the annealing rack shown, a stack of cold-rolled plates is placed between every t...

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Abstract

The invention provides a method and a material frame for annealing cold-rolled plates of low-magnetic alloy structural steel. The method comprises the following steps of: 1, arranging a cold-rolled plate stack of the low-magnetic alloy structural steel on a material frame bottom plate of the annealing material frame vertically to obtain a vertical cold-rolled plate stack; 2, arranging steel bar cushion blocks among the cold-rolled plates of the vertical cold-rolled plate stack, so that the cold-rolled plates are partitioned with each other at intervals; 3, clamping upper and lower ends of the vertical cold-rolled plate stack by using a clamping device; and 4, annealing the cold-rolled plate stack processed in the step 3 by using a bell-type furnace. By the method, surface hardened layers are not formed on upper and lower surfaces of the steel plate, so that the quality problem of the cold-bending cracks of the annealed steel plate is solved.

Description

technical field [0001] The present invention relates to an annealing method and annealing rack for low magnetic bond steel cold-rolled sheets, in particular to a vertical annealing method for low magnetic bond steel cold-rolled sheets. The surface hard layer with a thickness of about 0.05-0.1mm can meet the requirements of low magnetic steel plate for ships. Background technique [0002] Bonded steel refers to the steel used as mechanical parts and various engineering components and contains one or several certain amount of alloying elements. Low-magnetic steel (low-magnetic steel) is a steel that is insensitive to ferromagnetism, and steel with a magnetic permeability lower than 1.5 is usually called low-magnetic steel. [0003] The materials used on ships need to be resistant to magnetic interference, such as preventing mines and magnetic search, otherwise they are easily detected by enemy magnetic detectors, or attacked by enemy magnetic mines and other weapons. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/26C21D9/52C21D9/46
Inventor 郝月明杨培光贾成义张宇冰李杰
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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