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High-entropy alloy powder used on surface of riding wheel of rotary cement kiln, preparation method thereof and coating preparation method

A cement rotary kiln and high-entropy alloy technology, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problem that the coating quality and surface continuity cannot meet the production and use requirements, and the uniformity of powder components Insufficient, high powder oxidation, etc., to achieve excellent comprehensive performance, uniform components, high bonding strength

Active Publication Date: 2016-12-07
ANHUI RUITAI NEW MATERIALS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-entropy alloy powder prepared by the above-mentioned mortar grinding and ball milling method on the one hand uses metal powder as the raw material, which is expensive; There are differences in isothermal physical properties, and the uniformity of the powder components is still lacking, so that the quality and surface continuity of subsequent coatings prepared by various methods cannot meet the requirements of production and use.
Chinese patent CN104561878A adopts vacuum melting furnace melting high-entropy alloy cast rod-consumable electrode atomization two-step method to prepare high-entropy alloy powder, which improves the uniformity of the powder components, but the two-step method (preparing high-entropy alloy first) Entropy alloy casting ingot, and then high-entropy alloy powder prepared by atomization powder), the steps are complex, high energy consumption, and the surface of the high-entropy alloy matrix prepared in the first step is easy to form a layer of oxide film

Method used

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  • High-entropy alloy powder used on surface of riding wheel of rotary cement kiln, preparation method thereof and coating preparation method
  • High-entropy alloy powder used on surface of riding wheel of rotary cement kiln, preparation method thereof and coating preparation method

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Embodiment 1

[0027] The present invention proposes a high-entropy alloy powder for the surface of a cement rotary kiln supporting wheel, and its chemical composition includes: Fe: 19%, Al: 19%, Cr: 18%, Mn: 19%, Ni: 20.4 %, W: 3%, B: 0.6%, C: 1%.

[0028] The present invention also proposes a method for preparing high-entropy alloy powder for the surface of the supporting wheel of the cement rotary kiln, comprising the following steps:

[0029] S1. Weigh 19 kg of iron ingot, 19 kg of aluminum ingot, 18 kg of chromium ingot, 19 kg of manganese ingot, 17.15 kg of nickel ingot, 3 kg of metal tungsten, 3.85 kg of nickel-boron alloy and 1 kg of carbon powder according to the melting point. Put them into the medium frequency induction melting furnace in sequence from low to high, and evacuate to 1.5×10 -3 MPa, then filled with argon, and smelted for 60 minutes under the condition of argon pressure of 1.1 atmospheric pressure to obtain a metal liquid;

[0030] S2. Send the metal liquid into the...

Embodiment 2

[0035] The present invention proposes a high-entropy alloy powder for the surface of a cement rotary kiln supporting wheel, and its chemical composition includes: Fe: 18%, Al: 17.7%, Cr: 19%, Mn: 20%, Ni: 19 %, W: 4%, B: 0.8%, C: 1.5%.

[0036] The present invention also proposes a method for preparing high-entropy alloy powder for the surface of the supporting wheel of the cement rotary kiln, comprising the following steps:

[0037] S1. Weigh 18 kilograms of iron ingots, 17.7 kilograms of aluminum ingots, 19 kilograms of chromium ingots, 20 kilograms of manganese ingots, 14.7 kilograms of nickel ingots, 4 kilograms of metal tungsten, 5.1 kilograms of nickel boron alloys and 1.5 kilograms of carbon powder according to the melting point. Put them into the medium-frequency induction melting furnace in order of low to high, and vacuumize to 1.2×10 -3 MPa, then filled with argon, and smelted for 80 minutes under the condition of argon pressure of 1.1 atmospheric pressure to obtai...

Embodiment 3

[0041] A high-entropy alloy powder for the surface of a cement rotary kiln supporting wheel proposed by the present invention, its chemical composition includes: Fe: 20%, Al: 17%, Cr: 17%, Mn: 19.5%, Ni: 21 %, W: 2.8%, B: 0.7%, C: 2%.

[0042] The present invention also proposes a method for preparing high-entropy alloy powder for the surface of the supporting wheel of the cement rotary kiln, comprising the following steps:

[0043] S1. Weigh 20 kilograms of iron ingots, 17 kilograms of aluminum ingots, 17 kilograms of chromium ingots, 19.5 kilograms of manganese ingots, 17.2 kilograms of nickel ingots, 2.8 kilograms of metal tungsten, 4.5 kilograms of nickel-boron alloys and 2 kilograms of carbon powder according to the melting point. Put them into the medium frequency induction melting furnace in sequence from low to high, and evacuate to 1.5×10 -3 MPa, then filled with argon, and smelted for 70 minutes under the condition of argon pressure of 1.1 atmospheric pressure to ob...

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Abstract

The invention discloses high-entropy alloy powder used on the surface of a riding wheel of a rotary cement kiln, a preparation method thereof and a coating preparation method. The alloy powder comprises, by weight, 18%-20% of Fe, 17%-19% of Al, 17%-19% of Cr, 19%-20% of Mn, 19%-21% of Ni, 2.8%-4% of W, 0.6%-0.8% of B and 1.0%-2% of C. The alloy powder is prepared through a medium-frequency induction melting atomization one-step method. The high-entropy alloy powder and the preparation method thereof have the characteristics that pollution is small, environmental protection is realized, the steps are simple and energy consumption is low. A coating obtained through the hypersonic flame spraying process is suitable for the surface of the riding wheel of the rotary cement kiln. Bonding strength of the coating and a base body is high, the heat effect on the base body is small, tissue is good, and abrasion resistance of the riding wheel is improved after repair.

Description

technical field [0001] The invention relates to the technical field of metal powder materials and material surface treatment and strengthening, in particular to a high-entropy alloy powder for the surface of a cement rotary kiln supporting wheel, a preparation method thereof, and a method for preparing a coating using the same. Background technique [0002] At present, the large and medium-sized rotary kilns used in the cement industry need to use multiple supporting rollers to support the entire weight of the rotary kiln and materials, and to make the kiln body run safely and smoothly on the supporting rollers, so the use of supporting rollers seriously affects Operation of the rotary kiln. Most of the rotary kiln supporting rollers are made of ZG35CrMo. Due to long-term exposure to harsh working conditions such as high temperature and heavy load, pitting peeling or fatigue damage will occur during operation, so that the radial surface is ground into a concave shape. Serio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22F9/08C23C4/06C23C4/129
CPCB22F9/082C22C30/00C23C4/06
Inventor 冒爱琴丁赔赔武杏荣阮和平汪雷王彪刘敏
Owner ANHUI RUITAI NEW MATERIALS TECH
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