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Amorphous composite structure steel

A composite structure and amorphous technology, applied in the field of high-strength and tough amorphous composite structural steel, can solve the problems of restricting the application of amorphous steel and limited plastic deformation ability, and achieve high strength, easy plastic deformation, and low yield ratio Effect

Active Publication Date: 2017-01-04
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, due to the existence of indispensable metalloid and non-metallic components, the special chemical bond energy makes it have ultra-high strength while the plastic deformation ability is very limited, which seriously restricts the application of amorphous steel as a high-performance structural material.

Method used

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Embodiment Construction

[0006] The present invention is an amorphous composite structural steel, the composition of which is as follows: C: 0.02-0.2%; Mn: 13%-16%; Si: 3%-5%; Cr: 10%-12% %; Re: 0~2%, the rest is Fe element.

[0007] According to the above-mentioned amorphous composite structural steel, by weight percentage, its composition is: C: 0.2%; Mn: 15%; Si: 5%; Cr: 12%; Re: 0~1.4%, and the rest is Fe element ; Re is Y, or Nd, or Ce, or Dy.

[0008] The technical solution to realize the purpose of the present invention is: the quasi-brittle high-strength amorphous steel is toughened and plasticized by the TRIP effect, the supercooled austenite phase is precipitated in situ in the amorphous matrix, and the γ→ε martensitic phase transformation is generated under stress induction Strengthen and toughen the amorphous matrix.

[0009] Adding Mn element can be infinitely solid solution in γFe, reduce Ms, and effectively reduce stacking fault energy Γ , and can avoid the formation of α’ martensite...

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Abstract

The invention relates to an amorphous composite structure steel which comprises the following components in percentage by weight: 0.02-0.2% of C, 13-16% of Mn, 3-5% of Si, 10-12% of Cr, 0-2% of Re and the balance of Fe. The structure of the composite material is a gamma austenite phase+amorphous composite structure, and can generate gamma austenite-martensite phase transformation under the induction of stress to strengthen and toughen the metallic glass. The composite material has low yield-tensile ratio, can generate plastic deformation, and can reach high strength through the excellent work hardening capacity.

Description

technical field [0001] The invention relates to the field of iron-based amorphous composite materials, in particular to high-strength and tough amorphous composite structural steel. Background technique [0002] Steel is the dominant structural material today, and exploring high-performance structural steel with both high strength and ductility has always been the pursuit goal in the field of metal materials. The internal structure of amorphous steel retains the structure of liquid melt, without dislocation, grain boundary, segregation and other crystal defects. At room temperature, its strength and hardness are much higher than traditional Mg alloy, Ti alloy and super steel, etc. Excellent thermal stability, wear and corrosion resistance, can be used in anti-corrosion, high wear-resistant surface hardening and lightweight components, corrosion-resistant components, etc. However, due to the existence of indispensable metalloid and non-metallic components, the special chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02
CPCC22C45/02
Inventor 赵燕春寇生中李广李春燕马文龙毛瑞鹏许丛郁
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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