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High-wear-resistant oriented Fe2B compact block and preparation method thereof

A high anti-wear and dense technology, applied in the field of anti-wear materials, can solve the problems of no patent reports, etc., and achieve the effects of improving smelting efficiency, high purity, high hardness and wear resistance

Inactive Publication Date: 2020-04-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current research on high wear-resistant oriented Fe 2 There is no patent report on the detailed method of B block preparation

Method used

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  • High-wear-resistant oriented Fe2B compact block and preparation method thereof
  • High-wear-resistant oriented Fe2B compact block and preparation method thereof
  • High-wear-resistant oriented Fe2B compact block and preparation method thereof

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preparation example Construction

[0035] The present invention is a kind of high wear resistance oriented Fe 2 B dense block preparation method, comprises the following steps:

[0036] S1. Ingredients

[0037] Pure iron and ferroboron are batched according to the mass ratio Fe:B=91.2:8.8;

[0038] The content of Fe in the pure iron block is higher than 99.8%, and the surface oxide and pollution layer are removed; the B content in the boron iron is 10% to 25%, and the impurity elements other than B and Fe are lower than 1.2%.

[0039] S2, charging

[0040] Put the pure iron block and ferroboron particles into the corundum crucible in turn to ensure that the ferroboron particles fill the gap around the pure iron block and distribute tightly;

[0041] The pure iron block is placed in the center of the corundum crucible, surrounded by ferroboron particles.

[0042] S3, smelting

[0043] Place the crucible with the raw material in a vacuum induction melting furnace for vacuum melting. The melting parameters ar...

Embodiment 1

[0051] Using industrial pure iron (Fe content of 99.8wt%) and boron iron (B content of 19.8wt%) as raw materials, according to the weight ratio Fe:B=91.2:8.8, weigh 111.34g of pure iron and boron iron 88.89 g; Then, put the weighed pure iron and ferroboron into the melting crucible in turn, to ensure that the pure iron is in the middle of the crucible, and the ferroboron fills the space around the pure iron block and compacts it; put the crucible with raw materials into In the vacuum induction melting furnace, the pouring water glass sand mold is placed on the water-cooled copper block, and then the furnace door is closed to vacuumize; when the vacuum degree in the furnace cavity is lower than 10 -2 At Pa, turn on the heating button and control the heating rate to 50°C / min. When the melt temperature reaches 1600°C, turn down the heating power to keep the metal melt warm for 15 minutes, then turn off the heating program and observe the temperature of the metal melt in real time;...

Embodiment 2

[0053] With industrial pure iron (Fe content is 99.8wt%), boron iron (B content is 19.8wt%) and high-purity Cr particles (Cr content is 99.9wt%) as raw materials, according to the weight ratio Fe:Cr:B=89.2: 2:8.8 for batching, weighing 107.34g of pure iron, 88.89g of ferroboron and 4g of high-purity Cr particles; The iron is in the middle of the crucible, and ferroboron and high-purity Cr particles fill the space around the pure iron block and compact it; put the crucible with raw materials into the vacuum induction melting furnace, and place the pouring water glass sand mold on the water-cooled copper block , and then close the furnace door for vacuuming; when the vacuum degree in the furnace chamber is lower than 10 -2 At Pa, turn on the heating button and control the heating rate to 35°C / min. When the melt temperature reaches 1600°C, reduce the heating power to keep the metal melt warm for 20 minutes, then turn off the heating program and observe the temperature of the meta...

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Abstract

The invention discloses a high-wear-resistant oriented Fe2B compact block and a preparation method thereof. The method comprises the following steps that pure iron blocks and ferro-boron particles aretaken as raw materials, materials are prepared according to the mass ratio of Fe to B being 91.2: 8.8, the prepared mixed raw materials are put into a crucible, the crucible is put in a vacuum induction melting furnace for vacuum induction melting, after smelting is completed, metal melt is poured into a water glass sand mold cavity, and furnace cooling is conducted to a room temperature to obtain the oriented Fe2B block. The high-wear-resistant oriented Fe2B block prepared by the method has good purity and compactness, Fe2B crystal grains presents oriented arranged uniform columnar crystal form characteristics in a solidification direction, so that the high-hardness advantage of a cross section can be fully exerted, and the excellent wear-resistant performance is presented.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, in particular to a high wear-resistant oriented Fe 2 B Dense block and its preparation method. Background technique [0002] Metal borides are usually intermetallic compounds composed of transition metals and boron elements. They have high hardness and high temperature stability, and are widely used in wear-resistant coatings and composite material reinforcement. Fe 2 B intermetallic compound is a common boride. It is usually known as the hard phase of Fe-B wear-resistant alloy and the boronizing layer on the surface of steel materials. It has high wear resistance and high temperature zinc liquid corrosion resistance. Therefore, Fe 2 B blocks can be used as key component materials in anti-wear and anti-corrosion conditions. [0003] Fe with good wear resistance can be obtained through powder metallurgy and alloy smelting techniques. 2 B blocks. However, the Fe prepared by t...

Claims

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Application Information

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IPC IPC(8): C22C33/06C22C38/00C22C38/32C22C38/12C22C38/04B22C9/02B22D27/04
CPCB22C9/02B22D27/045C22C33/006C22C33/06C22C38/04C22C38/12C22C38/32
Inventor 坚永鑫皇志富邢建东高义民
Owner XI AN JIAOTONG UNIV
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