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Coating material for thermal insulation protection and coating preparation method thereof

A coating and alloy powder technology, applied in the field of coating materials and the preparation of coatings, can solve the problem of no iron-based amorphous/nanocrystalline coating, etc., and achieve good toughness, cost reduction, wear resistance and corrosion resistance. low effect

Active Publication Date: 2018-01-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] After searching, there is currently no patent report on the iron-based alloy powder material involved in the present invention and the use of atmospheric plasma spraying (APS) to prepare iron-based amorphous / nanocrystalline coatings.

Method used

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  • Coating material for thermal insulation protection and coating preparation method thereof
  • Coating material for thermal insulation protection and coating preparation method thereof
  • Coating material for thermal insulation protection and coating preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The mass percentages of elements in the iron-based alloy powder are as follows: Cr: 9%; Nb: 4%; Si: 1%; B: 4.6%; Fe and unavoidable impurities: the balance. Preparation of iron-based thermal insulation coating, spraying process parameters: current: 650A, argon flow: 40L / min, hydrogen flow: 12L / min, powder feeding rate: 75g / min, spraying distance: 110mm.

Embodiment 2

[0042] The mass percentages of elements in the iron-based alloy powder are as follows: Cr: 12%; Nb: 5.5%; Si: 2.5%; B: 4.0%; Fe and unavoidable impurities: the balance. Preparation of iron-based thermal insulation coating, spraying process parameters: current: 650A, argon flow: 40L / min, hydrogen flow: 12L / min, powder feeding rate: 75g / min, spraying distance: 110mm.

Embodiment 3

[0044] The mass percentages of elements in the iron-based alloy powder are as follows: Cr: 12%; Nb: 5.5%; Si: 2.5%; B: 4.0%; Fe and unavoidable impurities: the balance. Preparation of iron-based thermal insulation coating, spraying process parameters: current: 550A, argon flow rate: 35L / min, hydrogen flow rate: 6.5L / min, powder feeding rate: 60g / min, spraying distance: 100mm.

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Abstract

The invention discloses a coating material for thermal insulation protection and a coating preparing method of the coating material, and belongs to the technical field of surface coatings. Selected raw materials comprise alloy block materials and pure metal block materials and specifically include ferroboron, ferrocolumbium, ferrosilicon, pure chromium, pure iron and the like. Alloy powder is prepared through a high-pressure nitrogen gas atomization method, and finally alloy powder with good sphericity and the granularity of 30-75 microns is obtained. An atmosphere plasma spraying method is used for preparing an iron-based amorphous / nanocrystalline coating. The prepared coating has relatively low heat conductivity, and can be used in the field of surface thermal insulation protection.

Description

technical field [0001] The invention belongs to the field of surface coatings, and in particular relates to a coating material applicable to automobile engine heat insulation protection and a coating preparation method thereof. Background technique [0002] In recent years, how to further improve the energy utilization rate of traditional internal combustion engines and reduce their pollutant emissions has been one of the hot research issues in the automotive industry. At this stage, more attention is paid to how to improve the working efficiency of the engine, such as the mature development and application of technologies such as in-cylinder direct injection and turbocharging, which have effectively improved the fuel efficiency of the engine. However, in addition to the considerations of wear and corrosion, one of the main problems faced by increasing the combustion temperature is that it approaches or even exceeds the heat resistance limit of aluminum alloy structural mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/26C22C38/34C22C38/32C22C38/02C23C4/134C23C4/06
CPCC22C38/02C22C38/26C22C38/32C22C38/34C23C4/06
Inventor 周正姚海华贺定勇王亮王国红王一鸣吴旭钱子颢
Owner BEIJING UNIV OF TECH