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A kind of micro-alloyed high-strength-tough low-density steel and preparation method thereof

A technology of micro-alloying and low-density steel, which is applied in the field of micro-alloying high-strength toughness and low-density steel and its preparation, to achieve the effect of improving the potential of lightweight

Active Publication Date: 2022-07-29
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the precipitation phenomenon of microalloying has not been reported in traditional austenitic steels, let alone in low-density steels

Method used

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  • A kind of micro-alloyed high-strength-tough low-density steel and preparation method thereof
  • A kind of micro-alloyed high-strength-tough low-density steel and preparation method thereof
  • A kind of micro-alloyed high-strength-tough low-density steel and preparation method thereof

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preparation example Construction

[0026] A method for preparing the above-mentioned microalloyed high-strength-tough low-density steel, comprising the following steps: obtaining molten steel by smelting, casting the molten steel into a billet or ingot, and heating the billet or ingot to a temperature of 1100- 1180°C, obtain profiles by forging or hot rolling in the range of 800-1150°C, directly perform high-temperature solution treatment at 900-1150°C or cold-roll the profiles at 900-1150°C for high-temperature solution treatment treatment, so that the microalloying elements and C in the Fe-Mn-Al-C alloy system are precipitated as carbides in the austenite grains and / or in the austenite grain boundaries, so as to achieve high strength and toughness of low-density steel. Effective bonding of low density. The profile is bar or wire or plate. An application of the above-mentioned microalloyed high-strength-tough low-density steel in aerospace equipment or marine ship equipment or high-end transportation equipmen...

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Abstract

A micro-alloyed high-strength-tough-low-density steel and a preparation method thereof, by distributing one or more of the following micro-alloying elements in the iron-based austenite microstructure of the Fe-Mn-Al-C alloy system: V , Nb, Ti, Mo, and the microalloying elements and the C in the Fe-Mn-Al-C alloy system are precipitated as carbides in the austenite grains and / or in the austenite grain boundaries, It is beneficial to realize the effective combination of high strength and low density of low density steel.

Description

technical field [0001] The invention relates to Fe-Mn-Al-C series austenitic low-density steel technology, in particular to a microalloyed high-strength-toughness low-density steel and a preparation method thereof. The austenite microstructure is distributed with one or more of the following microalloying elements: V, Nb, Ti, Mo, and the microalloying elements and C in the Fe-Mn-Al-C alloy system The carbides are precipitated in the austenite grains and / or in the austenite grain boundaries, which is beneficial to realize the effective combination of high strength, toughness and low density of low-density steel. Background technique [0002] At present, domestic and foreign steel materials for automobiles, trains, etc., wear-resistant materials for mining machinery and large-scale transportation machinery, high-performance steel materials for aerospace, high-strength steel for large ships, and various armors and other steel materials all reduce the weight of materials. highe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/12C22C38/14C22C38/16C22C38/38C22C38/34C22C38/26C22C38/28C22C38/24C22C38/22C22C38/32C22C38/20C21D8/06C21D8/02
CPCC22C38/04C22C38/06C22C38/12C22C38/14C22C38/16C22C38/005C22C38/38C22C38/34C22C38/26C22C38/28C22C38/24C22C38/22C22C38/32C22C38/20C21D8/065C21D8/0226C21D8/0236C21D8/0247
Inventor 曹文全王存宇俞峰徐海峰许达
Owner CENT IRON & STEEL RES INST