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Preparation method of iron-based composite material

A technology of iron-based composite materials and vanadium-iron alloys, which is applied in the field of preparation of in-situ C-reinforced iron-based composite materials, can solve the problems of complex heat treatment process and specific process, and achieve high strength, improved performance and good plasticity

Active Publication Date: 2016-05-04
CRRC QISHUYAN INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the disclosed in-situ casting methods simply adopt the existing ordinary carbon steel melting and pouring process, and do not adopt a specific process for the specific characteristics of the designed metal matrix composite material, and the heat treatment process is complicated. Therefore, There is still room for improvement and optimization in the selection and proportion of raw materials, smelting and heat treatment processes, etc.

Method used

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  • Preparation method of iron-based composite material
  • Preparation method of iron-based composite material
  • Preparation method of iron-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A (Nb, V) C reinforced iron-based composite material, the reinforcing phase of which is a carbide solid solution (Nb, V) C synthesized in situ by Nb, V and C atoms, in terms of mass percentage, the iron-based composite material Containing 2.75% to 6.60% of Nb, 1.50% to 3.6% of V and an appropriate amount of C, the content of C can at least ensure that both the Nb and the V are completely formed into carbides, and the rest are solid-dissolved in the iron matrix The content of C is not more than 0.5%.

[0045] In this example, the selected in situ synthesis system contains niobium (Nb), vanadium (V), carbon (C), iron (Fe), etc., in terms of mass percentage, the main components are:

[0046]

[0047] Among them, the atomic number ratio of Nb and V is 1:1, and the content of C is calculated to ensure complete reaction with Nb and V to form NbC and VC. Other secondary elements (such as Si, Mn, P, S in iron matrix) and auxiliary elements (such as Al in deoxidizer, RE in m...

Embodiment 2

[0059] A (Nb, V) C reinforced iron-based composite material, the reinforcing phase of which is a carbide solid solution (Nb, V) C synthesized in situ by Nb, V and C atoms, in terms of mass percentage, the iron-based composite material Containing 2.75% to 6.60% of Nb, 1.50% to 3.6% of V and an appropriate amount of C, the content of C can at least ensure that both the Nb and the V are completely formed into carbides, and the rest are solid-dissolved in the iron matrix The content of C is not more than 0.5%.

[0060] In this example, the selected in situ synthesis system contains niobium (Nb), vanadium (V), carbon (C), iron (Fe), etc.

[0061] The main components are calculated in mass percent:

[0062]

[0063] Among them, the atomic number ratio of Nb and V is 1:1, and the C content is calculated by completely reacting with Nb and V to form NbC and VC. Other secondary elements (such as Si, Mn, P, S in iron matrix) and auxiliary elements (such as Al in deoxidizer, RE in mo...

Embodiment 3

[0075] A (Nb, V) C reinforced iron-based composite material, the reinforcing phase of which is a carbide solid solution (Nb, V) C synthesized in situ by Nb, V and C atoms, in terms of mass percentage, the iron-based composite material Containing 2.75% to 6.60% of Nb, 1.50% to 3.6% of V and an appropriate amount of C, the content of C can at least ensure that both the Nb and the V are completely formed into carbides, and the rest are solid-dissolved in the iron matrix The content of C is not more than 0.5%.

[0076] In this example, the selected in situ synthesis system contains niobium (Nb), vanadium (V), carbon (C), iron (Fe), etc., and the main components are expressed in mass percent:

[0077]

[0078] Among them, the atomic number ratio of Nb and V is 0.6:1, and the C content is calculated by completely reacting with Nb and V to form NbC and VC. Other secondary elements (such as Si, Mn, P, S in iron matrix) and auxiliary elements (such as Al in deoxidizer, RE in modifi...

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Abstract

The invention provides a preparation method for an iron-based composite material. The preparation method comprises the following steps: combining an in-situ synthesis reinforcing phase with a liquid forming phase, using low-carbon steel scrap, ferrovanadium, ferroniobium and graphite carburant as raw materials, adding carbide forming elements Nb and V in molten liquid steel, and reacting in situ at a high temperature to generate (Nb, V)C carbide solid solution composite materials which are diffusely distributed in iron base. According to the preparation method provided by the invention, the carbide solid solution (Nb, V)C of NbC and VC is designed to be used as the reinforcing phase of the iron-based composite material, the synergetic enhancement effect of the mutual solid solution enhancement of the two carbides is reasonably utilized, a matrix enhancement effect better than the matrix enhancement effect of a composite material using NbC as a reinforcing phase is obtained, and the wear resistance, hardness, casting performance and cutting processing performance of the iron-based composite material are all considered well.

Description

[0001] The present invention is a divisional application with the application number 201010617087.9, the filing date is 2010.12.31, and the name is "iron-based composite material and preparation method of iron-based composite material". technical field [0002] The invention relates to a method for preparing a metal-based composite material, in particular to a method for preparing an in-situ (Nb, V)C reinforced iron-based composite material. Background technique [0003] MC carbide-reinforced metal matrix composites have the advantages of high specific strength, high specific modulus, high wear resistance and high temperature resistance, and are currently a key research direction of wear-resistant composite materials at home and abroad. The MC carbide reinforcement phase in MC carbide reinforced metal matrix composites is mainly carbides of IVA-VIA group elements. These carbides are thermodynamically stable, have high melting point and high hardness, and can effectively stren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/12C22C33/06
Inventor 程凤军莫俊超陈红圣
Owner CRRC QISHUYAN INSTITUTE CO LTD