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Super-tenacity steel and iron material and manufacturing method thereof

A steel material and toughness technology, which is applied in the field of super tough steel material and its manufacturing, can solve the problems of brittle fracture impact toughness of metal materials, and achieve the effect of outstanding performance and simple composition elements

Active Publication Date: 2020-04-10
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0048] The purpose of the present invention is to solve the problem of brittle fracture and poor impact toughness of metal materials under low temperature conditions. Metal materials have super toughness under low temperature conditions, and the impact energy is greater than 420J

Method used

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  • Super-tenacity steel and iron material and manufacturing method thereof
  • Super-tenacity steel and iron material and manufacturing method thereof
  • Super-tenacity steel and iron material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Example 1: Fe-29.5%Mn-0.10%C, passed through 50% cold rolling and then annealed at 700°C for 1 hour.

Embodiment 2

[0102] Example 2: Fe-30%Mn-0.11%C, annealed at 700°C for 1 hour after passing 50% cold rolling.

Embodiment 3

[0103] Example 3: Fe-31.5%Mn-0.15%C, after passing 50% cold rolling, annealing at 700°C for 1 hour.

[0104] Table 3. Room temperature and liquid nitrogen temperature impact energy of steel samples with different compositions

[0105]

[0106] In the above examples, three samples were made in each case. It can be seen that, compared with the comparative example, the impact energy is greatly improved under low temperature conditions, and an inverse temperature effect occurs. Among them, the performance index of Example 2 is the best.

[0107] The following examples and comparative examples are aimed at the characteristics of Fe-30%Mn-0.11%C steel obtained by different processes.

[0108] Example 2: 0.11% C, 30% Mn, the rest is Fe and inevitable impurities. After hot forging and annealing, 50% cold rolling, rolling speed of 4.2m / s, pass deformation of 1mm / pass; after cold rolling, annealing at 700℃ for 1 hour, Fe-30 with an average grain size of 5.6 microns is obtained %Mn-0.11%C stee...

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Abstract

The invention provides a super-tenacity steel and iron material and a manufacturing method thereof, belongs to the field of steel and iron materials and processing and preparing of the steel and ironmaterials, and specifically relates to the super-tenacity steel and iron material used under low-temperature conditions and the manufacturing method of the super-tenacity steel and iron material. Thesteel and iron material comprises, by weight, 0.10%-0.15% of C, 29.5%-31.5% of Mn and the balance Fe and inevitable impurities. The manufacturing method includes the following steps that A1, argon-shielded smelting is conducted, and electroslag remelting processing is conducted; A2, hot rolling or hot forging is conducted; A3, annealing is conducted for 1 h at the temperature being 900 DEG C to 1100 DEG C, and quenching is conducted; A4, cold rolling is conducted, a cold-rolled sheet is subjected to annealing for 1 h at the temperature being 700 DEG C to 1200 DEG C, and quenching is conductedafter annealing. The steel material is simple in composition element and does not contain precious metal; and the average grain size is smaller than 30 micrometers, and the material has a complete face-centered cubic structure and does not have magnetism. Performance is particularly outstanding under low-temperature conditions, and the low-temperature impact energy exceeds that of all known metalmaterials at present.

Description

Technical field [0001] The invention belongs to the field of steel materials and their processing and preparation, and particularly relates to a super tough steel material used under low temperature conditions and a manufacturing method thereof. Background technique [0002] Working equipment under low temperature conditions, such as outer space (about 4K) for collecting space debris satellite outer panels, and cryogenic superconducting field cooling devices (2K-4K), have extremely demanding material requirements. [0003] In addition, conventional applications on the ground, such as liquefied natural gas storage tanks (liquefaction temperature -163°C), polar icebreakers, etc., also have extremely high requirements on the toughness and impact resistance of materials. [0004] Under the above-mentioned environment, common metal materials have the problems of brittle fracture and poor impact toughness. [0005] The current research, the structural materials supporting superconducting ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C33/04C21D8/02C21D1/18C21D1/26
CPCC22C38/04C22C33/04C21D8/0205C21D8/0247C21D8/0226C21D8/0236C21D1/18C21D1/26C21D2211/001C21D8/0273
Inventor 王玉辉黄晓旭王天生郑亚楠刘建华彭艳廖波
Owner YANSHAN UNIV
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