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A steel plate with excellent low-temperature toughness for explosive compounding and its production method

A technology of low temperature toughness and production method, applied in the field of metallurgy, can solve the problems of decreased plastic toughness and increased dislocation density of steel substrate grains, and achieves the effects of internal compactness, excellent mechanical properties, and excellent mechanical properties.

Active Publication Date: 2021-10-29
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the explosive welding process, the impact load increases the dislocation density (dislocation package, entangled dislocation) inside the grain of the steel substrate, and the plasticity and toughness decrease

Method used

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  • A steel plate with excellent low-temperature toughness for explosive compounding and its production method
  • A steel plate with excellent low-temperature toughness for explosive compounding and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The thickness of the steel plate with excellent low-temperature toughness used for explosive compounding in this embodiment is 60 mm, and the chemical composition and mass percentage of the steel plate are shown in Table 1.

[0023] The production method of the steel plate with excellent low-temperature toughness for explosive compounding in this embodiment includes smelting, continuous casting, heating, rolling, cooling after rolling, and heat treatment processes. The specific process steps are as follows:

[0024] (1) The smelting process: including primary smelting, LF furnace refining, VD furnace vacuum treatment:

[0025] A. Primary smelting: high-quality materials are first selected for smelting in electric furnaces, and the conditions for tapping steel in primary smelting furnaces: P: 0.008%;

[0026] B. Refining in LF furnace: Put the initial molten steel into the LF furnace for refining, adjust the composition of each element, the total refining time is 65 minu...

Embodiment 2

[0035] The thickness of the steel plate with excellent low-temperature toughness used for explosive compounding in this embodiment is 90 mm, and the chemical composition and mass percentage of the steel plate are shown in Table 1.

[0036] The production method of the steel plate with excellent low-temperature toughness for explosive compounding in this embodiment includes smelting, continuous casting, heating, rolling, cooling after rolling, and heat treatment processes. The specific process steps are as follows:

[0037] (1) The smelting process: including primary smelting, LF furnace refining, VD furnace vacuum treatment:

[0038] A. Primary smelting: high-quality materials are first selected for smelting in electric furnaces, and the conditions for tapping steel in primary smelting furnaces: P: 0.007%;

[0039] B. Refining in LF furnace: put the initial molten steel into the LF furnace for refining, adjust the composition of each element, the total refining time is 62 minu...

Embodiment 3

[0048] The thickness of the steel plate with excellent low-temperature toughness used for explosive compounding in this embodiment is 120 mm. The chemical composition and mass percentage of the steel plate are shown in Table 1.

[0049] The production method of the steel plate with excellent low-temperature toughness for explosive compounding in this embodiment includes smelting, die casting, heating, rolling, post-rolling cooling, and heat treatment processes. The specific process steps are as follows:

[0050] (1) The smelting process: including primary smelting, LF furnace refining, VD furnace vacuum treatment:

[0051] A. Primary smelting: high-quality materials are first selected for smelting in electric furnaces, and the conditions for tapping steel in primary smelting furnaces: P: 0.006%;

[0052] B. Refining in LF furnace: Put the initial molten steel into the LF furnace for refining, adjust the composition of each element, the total refining time is 61 minutes, and th...

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Abstract

The invention discloses a steel plate with excellent low-temperature toughness for explosive compounding and a production method thereof. The chemical composition and mass percentage of the steel plate are: C: 0.17-0.20%, Si: 0.25-0.55%, Mn: 1.20 ~1.30%, P≤0.010%, S≤0.008%, Ni: 0.20~0.30%, Al: 0.025~0.050%, Nb: 0.010~0.050%, Cr: 0.005~0.020%, the balance is Fe and unavoidable Impurities; the production method includes smelting, continuous casting, heating, rolling, cooling after rolling, and heat treatment. The steel plate obtained by the invention has the characteristics of high purity, uniform composition, compact interior, excellent mechanical properties, and is completely suitable for the manufacture of explosive composite plates serving under low temperature and severe working conditions.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a steel plate with excellent low-temperature toughness for explosive compounding and a production method thereof. Background technique [0002] Explosive composite panels are mainly used in anti-corrosion and pressure vessel manufacturing, requiring steel to have good low-temperature impact toughness. During the explosive welding process, the impact load increases the dislocation density (dislocation packets, entangled dislocations) inside the grains of the steel substrate, and the plasticity and toughness decrease. When a crack occurs, stress concentration is prone to occur at the crack tip, making the crack more likely to expand. Therefore, improving the ability of steel substrates to impact loads during explosive welding can improve the low-temperature impact performance of steel substrates after explosive lamination, and play a major role in improving the capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21C7/10C21D1/18C21D6/00C21D8/02C21D9/00C22C38/02C22C38/04C22C38/06C22C38/48
CPCC21C7/10C21D1/18C21D6/004C21D6/005C21D6/008C21D8/0226C21D9/0081C22C33/04C22C38/002C22C38/02C22C38/04C22C38/06C22C38/48
Inventor 于勇邓建军蒙耀华李建朝李杰赵国昌贺霄任鑫磊吕建会庞辉勇龙杰
Owner WUYANG IRON & STEEL
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