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Rare earth impact resistance steel plate and preparation method thereof

An impact-resistant steel plate technology, applied in the field of impact-resistant steel, can solve the problems of poor plate shape and processing performance, high price, etc., and achieve the effects of improving impact resistance, increasing strength and toughness, and reducing production costs

Inactive Publication Date: 2019-05-14
INNER MONGOLIA METAL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the impact-resistant steel plates trial-produced in my country are quenched and hardened steels, and their shape and processing performance are not as good as those of hot-rolled steel plates. However, hot-rolled steel plates are completely monopolized by Swedish SSAB company, and the selling price is relatively expensive.

Method used

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  • Rare earth impact resistance steel plate and preparation method thereof
  • Rare earth impact resistance steel plate and preparation method thereof
  • Rare earth impact resistance steel plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A rare earth impact steel sheet, according to C 0.35%; Si 0.3%; Mn 0.9%; Cr 1%; Ni 2%; Mo0.3%; V 0.18%; Nb 0.02%; P 0.006%; S 0.005%; 0.006%; the rest are the inevitable impurity components of Fe element for batching, and the following preparation process is completed:

[0031] (1) Smelting: The vacuum induction furnace is used to smelt the steel ingot. The specific processes include: charging, melting, refining, alloying and deoxidation, and pouring;

[0032] (2) Forging: The smelted steel ingot is heated to 1250°C for 8 hours for hammer forging. The forging adopts a 700Kg air hammer, the initial forging temperature is 1150°C, and the final forging temperature is 950°C; the size of the formed billet is: 140mm×140mm×200mm;

[0033] (3) Rolling: The 140mm×140mm×200mm billet is heated to 1280°C, kept for 1 hour, and rolled after being released from the furnace. The rolling is divided into 4 passes, and the 140mm thick billet is rolled into a 30mm thick steel plate. Cooli...

Embodiment 2

[0039] A rare earth impact steel sheet, according to C 0.35%; Si 0.3%; Mn 0.9%; Cr 1%; Ni 2%; Mo0.3%; V 0.18%; Nb 0.02%; P 0.006%; S 0.005%; 0.0075%; the rest are the inevitable impurity components of Fe element for batching, and the following preparation process is completed:

[0040] (1) Smelting: The vacuum induction furnace is used to smelt the steel ingot. The specific processes include: charging, melting, refining, alloying and deoxidation, and pouring;

[0041] (2) Forging: The smelted steel ingot is heated to 1270°C for 8 hours for hammer forging. The forging adopts a 700Kg air hammer, the initial forging temperature is 1160°C, and the final forging temperature is 955°C; the size of the formed billet is: 140mm×140mm×200mm;

[0042] (3) Rolling: The 140mm×140mm×200mm billet is heated to 1290°C, kept for 1 hour, and rolled after being released from the furnace. The rolling is divided into 4 passes, and the 140mm thick billet is rolled into a 30mm thick steel plate. Cool...

Embodiment 3

[0045] A rare earth impact steel sheet, according to C 0.35%; Si 0.3%; Mn 0.9%; Cr 1%; Ni 2%; Mo0.3%; V 0.18%; Nb 0.02%; P 0.006%; S 0.005%; 0.009%; the rest are the inevitable impurity components of Fe element for batching, and the following preparation process is completed:

[0046] (1) Smelting: The vacuum induction furnace is used to smelt the steel ingot. The specific processes include: charging, melting, refining, alloying and deoxidation, and pouring;

[0047] (2) Forging: The smelted steel ingot is heated to 1270°C for 8 hours for hammer forging. The forging adopts a 700Kg air hammer, the initial forging temperature is 1170°C, and the final forging temperature is 960°C; the size of the formed billet is: 140mm×140mm×200mm;

[0048] (3) Rolling: The 140mm×140mm×200mm billet is heated to 1300°C, kept for 1 hour, and rolled after being released from the furnace. The rolling is divided into 4 passes, and the 140mm thick billet is rolled into a 30mm thick steel plate. Cooli...

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Abstract

The invention discloses a rare earth impact resistance steel plate and a preparation method thereof. The rare earth impact resistance steel plate is prepared from the components in percentage by mass:0.18%-0.36% of C, 0.2%-0.8% of Si, 0.75%-1.5% of Mn, 0.8%-1.8% of Cr, 1.5%-2.3% of Ni, 0.25%-0.6% of Mo, 0.15%-0.25% of V, 0.015%-0.025% of Nb, less than or equal to 0.01% of P, less than or equal to0.01% of S, 0.006%-0.01% of RE, and the balance Fe and inevitable impurities. The yield strength of the obtained steel plate is 1350 MPa to1480 MPa, tensile strength is 1550 MPa to 1750 MPa, the extension rate is 12%-14%, the normal temperature impact performance (u-shaped gap) is 55-60 J, low temperature impact performance (-40 DEG C, u-shaped gap) is 30-38 J, and the Brinell hardness HBS is 450-550.

Description

technical field [0001] The invention relates to the technical field of impact-resistant steel, and particularly provides a rare-earth impact-resistant steel plate and a preparation method thereof. Background technique [0002] Impact-resistant steel is the most basic and important structural and protective material for special vehicles. It can be used directly on special vehicles as homogeneous armor, and can also be used as a structural unit to become a component of special armor, which plays a considerable role in the protection of armored vehicles. important role. For this reason, the development and production of impact-resistant armor steel are placed in an important position in foreign countries. [0003] In the development of anti-impact steel plates, the material selection is also slightly different according to different protection objectives. For example, bulletproof steel plates for bulletproof cash transport vehicles, anti-terrorism, explosion-proof and peaceke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/44C22C38/46C22C38/48C21D8/02C21D1/28C21D1/18
Inventor 张鸣一高平耿文远田迎春兰兰
Owner INNER MONGOLIA METAL MATERIAL RES INST
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