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Iron-based composite material and its preparation method and application

A technology of iron-based composite materials and pig iron, which is applied in the field of anti-corrosion and wear of liquid metals, can solve problems affecting the application of high-boron alloys, and achieve the effects of improving anti-corrosion efficiency, good bonding, and strengthening anti-corrosion performance of molten aluminum

Active Publication Date: 2021-11-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These will seriously affect the application of high boron alloys in the field of liquid metal corrosion and wear

Method used

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  • Iron-based composite material and its preparation method and application
  • Iron-based composite material and its preparation method and application
  • Iron-based composite material and its preparation method and application

Examples

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preparation example Construction

[0034]

[0035] The preparation method of iron-based composite material of the present invention comprises the steps:

[0036] (1) Add steel scrap, pig iron, ferrochrome and ferronickel into a vacuum intermediate frequency induction furnace, mix and melt to obtain a mixed solution;

[0037] (2) After the mixed liquid is completely cleared, the temperature is lowered to 1550±10°C, and the temperature is kept for 10-12min to obtain the alloy liquid;

[0038] (3) Add ferroboron, ferrosilicon and ferrotitanium into the alloy liquid, heat up to 1580±10°C, and roll for about 2 minutes to obtain molten steel;

[0039] (4) Controlling the temperature of the molten steel at 1530-1550° C., casting it into a preheated cast iron mold, and demoulding to obtain an iron-based composite material.

[0040] In fact, electromagnetic stirring is always applied during the above-mentioned melting process, so as to ensure uniform alloy composition and uniform dispersion of in-situ-generated ceram...

Embodiment 1

[0049] The iron-based composite material of the present embodiment comprises the following components:

[0050] 0.35wt% C, 3.5wt% B, 12.0wt% Cr, 0.7wt% Ti, 0.5wt% Ni, 2.0wt% Si, the balance being Fe.

[0051] The preparation method of the iron-based composite material of the present embodiment comprises the following steps:

[0052] (1) Add steel scrap, pig iron, ferrochrome and ferronickel into a vacuum intermediate frequency induction furnace, mix and melt to obtain a mixed solution;

[0053] (2) After the mixed liquid is completely cleared, the temperature is lowered to 1550°C, and the temperature is kept for about 10 minutes to obtain the alloy liquid;

[0054] (3) Add ferroboron, ferrosilicon and ferrotitanium into the alloy liquid, heat up to 1580°C, and roll for about 2 minutes to obtain molten steel;

[0055] (4) Control the temperature of the molten steel at 1530° C., pour it into a preheated cast iron mold, and demold it to obtain an iron-based composite material. ...

Embodiment 2

[0057] The content of added Ti element is 1.4wt%, and the content and preparation method of other components are the same as in Example 1.

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Abstract

The invention provides an iron-based composite material and its preparation method and application. The composite material includes 0.2-0.5wt% carbon, 2.0-4.0wt% boron, 8.0-16.0wt% chromium, 0.7-2.0wt% titanium, 0.4 ‑0.6wt% nickel, 1.0‑3.0wt% silicon, sulfur<0.05wt%, phosphorus<0.05wt%, the balance is iron, the invention adds a specific content of titanium element, and the in-situ reaction generates micron and nanometer Class ceramic particles, these ceramic particles can not only regulate the Fe in the iron-boron alloy 2 The shape and size of the B phase can further strengthen the corrosion resistance of the iron matrix and make up for the short plate that the iron matrix is ​​easily corroded by the aluminum liquid; 2 Under the coordinated action of these multi-scale compounds in the B phase, it effectively hinders the diffusion of aluminum atoms into the iron matrix during the corrosion process, thereby greatly improving the corrosion resistance efficiency.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion and wear of liquid metal, and in particular relates to an iron-based composite material and its preparation method and application. Background technique [0002] In the production process of aluminum alloy die-casting, metal parts such as crucibles, goosenecks and molds are faced with the combined action of high-temperature corrosion and high-temperature wear of molten aluminum, which not only greatly reduces the service life of metal parts, but also causes pollution of molten aluminum. The quality of the product is reduced, which seriously affects the production efficiency of the enterprise. [0003] At present, hot work die steels DIN1.2888 and H13 with better high temperature performance are mostly used for goosenecks and die casting molds on hot chamber die casting machines at home and abroad. Compared with H13, DIN1.2888 has better corrosion resistance to molten aluminum, so it is oft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C38/02C22C38/34C22C38/50C22C38/54
CPCC22C33/06C22C38/002C22C38/02C22C38/34C22C38/50C22C38/54
Inventor 王奎徐高鹏董显平蒋海燕丁文江
Owner SHANGHAI JIAO TONG UNIV
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