Multi-scale boride reinforced high-temperature-resistant molten aluminum erosion-resistant iron-based material and preparation method thereof

A technology of iron-based materials and borides, which is applied in the field of multi-scale boride-reinforced high-temperature-resistant molten aluminum corrosion-resistant iron-based materials and its preparation, can solve the problems of poor uniformity of the surface infiltration layer, difficulty in processing and forming, and melting of the modified layer. Corrosion and perforation and other problems, to achieve the effect of excellent resistance to molten aluminum corrosion, good mechanical properties, and low cost

Inactive Publication Date: 2020-07-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, domestic and foreign research on molten aluminum corrosion-resistant materials is mainly focused on: surface modification of die steel, such as boronizing, nitriding, etc., but the surface permeation layer is thin and uniform. Under the action of corrosion, the weak part of the modified layer is prone to erosion and perforation, resulting in material failure
In addition, for integral metal materials such as refractory alloys (titanium-based, tungsten-based, molybdenum-based, etc.), although they have good corrosion resistance to molten aluminum, the preparation and processing of this series of materials are difficult and costly. practical application of

Method used

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  • Multi-scale boride reinforced high-temperature-resistant molten aluminum erosion-resistant iron-based material and preparation method thereof
  • Multi-scale boride reinforced high-temperature-resistant molten aluminum erosion-resistant iron-based material and preparation method thereof
  • Multi-scale boride reinforced high-temperature-resistant molten aluminum erosion-resistant iron-based material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the high temperature resistant molten aluminum erosion wear material described in this embodiment specifically includes the following steps:

[0031] (1) Mix and heat scrap steel, pig iron, ferrochrome, ferromolybdenum, ferroboron, ferrotitanium, ferromanganese, ferrosilicon, and high-purity aluminum ingots, and adjust the composition (wt.%) to: C:0.1, B:3.5 , Cr: 12.0, Mo: 1.5, Si: 3.5, Al: 3.5, Mn: 0.5, Ti: 0.5, the balance is Fe;

[0032] (2) Heating the temperature of the alloy melt to 1520°C, and then pouring it into the mold at a pouring temperature of 1450°C, cooling and solidifying to obtain a casting, that is, the high-temperature-resistant molten aluminum erosion wear material (multi-scale boride-enhanced resistant High-temperature molten aluminum corrodes iron-based materials).

[0033] The structure of the multi-scale boride-reinforced high-temperature-resistant molten aluminum corrosion-resistant iron-based material prepared in th...

Embodiment 2

[0035] The preparation method of the high temperature resistant molten aluminum erosion wear material described in this embodiment specifically includes the following steps:

[0036] 1) Mix and heat scrap steel, pig iron, ferrochrome, ferromolybdenum, ferroboron, ferrotitanium, ferromanganese, ferrosilicon, and high-purity aluminum ingots, and adjust the composition (wt.%) to: C:0.2, B:8.5, Cr: 15.5, Mo: 3.0, Si: 0.5, Al: 6.0, Mn: 1.5, Ti: 6.5, the balance is Fe;

[0037] (2) Heating the temperature of the molten alloy to 1540°C, and then pouring it into the mold at a pouring temperature of 1460°C, cooling and solidifying to obtain a casting, that is, the high-temperature-resistant molten aluminum erosion wear material (multi-scale boride-enhanced resistant High-temperature molten aluminum corrodes iron-based materials).

[0038] The structure of the multi-scale boride-reinforced high-temperature-resistant molten aluminum corrosion-resistant iron-based material prepared in this...

Embodiment 3

[0040] The preparation method of the high temperature resistant molten aluminum erosion wear material described in this embodiment comprises the following steps:

[0041] (1) Mix and heat scrap steel, pig iron, ferrochrome, ferromolybdenum, ferroboron, ferrotitanium, ferromanganese, ferrosilicon, and high-purity aluminum ingots, and adjust the composition (wt.%) to: C:0.5, B:5.5 , Cr:20.0, Mo:8.5, Si:1.5, Al:2.5, Mn:2.0, Ti:3.5, the balance is Fe;

[0042] (2) Heating the temperature of the alloy melt to 1560°C, and then pouring it into the mold at a pouring temperature of 1470°C, cooling and solidifying to obtain a casting, that is, the high-temperature-resistant molten aluminum erosion wear material (multi-scale boride-reinforced wear-resistant High-temperature molten aluminum corrodes iron-based materials).

[0043] The microstructure of the multi-scale boride-reinforced high-temperature-resistant molten aluminum corrosion-resistant iron-based material prepared in this exa...

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Abstract

The invention discloses a multi-scale boride reinforced high-temperature-resistant and molten aluminum erosion-resistant iron-based material and a preparation method thereof. The multi-scale boride reinforced iron-based material prepared by the method is smelted by using an electric furnace, and a formed casting structure consists of a matrix ferrite phase, a rod-shaped Cr-rich M2B (M=Fe, Cr, Mo)boride phase, a net-shaped eutectic Mo-rich M2B boride and a dispersed granular TiB2 phase, so that the multi-scale boride reinforced iron-based material has good molten aluminum erosion resistance and strong toughness. The high temperature hardness at 750 DEG C reaches 300.0-450.0 HV, the room temperature impact toughness is greater than 4.0 J/cm2, and the high temperature molten aluminum erosionrate is reduced by 50%-80% compared with H13 steel. The prepared molten aluminum erosion-resistant iron-based material can greatly prolong the service life of parts and has high economic benefit.

Description

technical field [0001] The invention belongs to the technical field of corrosion-resistant metal materials, and in particular relates to a multi-scale boride-reinforced high-temperature molten aluminum corrosion-resistant iron-based material and a preparation method thereof. Background technique [0002] During the smelting and forming process of aluminum and its alloys, such as smelting, hot-dip aluminum plating, and semi-solid processing, due to the high chemical activity of molten aluminum, it can almost have metallurgical reactions with all metal materials such as crucibles, molds, and fixtures. Reduce the service life of parts, or even failure. In addition, the dissolution of parts in contact with molten aluminum will cause contamination of aluminum and its alloy liquid. [0003] The erosion mechanism is mainly as follows: the iron-based material dissolves and diffuses in the molten aluminum, and forms a corrosion product-intermetallic compound layer on the surface of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C38/02C22C38/04C22C38/06C22C38/22C22C38/28C22C38/32C22C38/34C22C38/38
CPCC22C33/06C22C38/02C22C38/04C22C38/06C22C38/22C22C38/28C22C38/32C22C38/34C22C38/38
Inventor 陈维平凌自成杨鑫李兵
Owner SOUTH CHINA UNIV OF TECH
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