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Cermet composite material and coating preparation method thereof

A metal-based composite and coating technology, which is applied in the preparation of metal-based composite powder and its coating, and the preparation of composite powder and its composite coating, can solve the problems that do not involve iron-based-ceramic composite thermal insulation coating , to achieve the effect of low cost, low thermal conductivity and wide range of powder particle size

Inactive Publication Date: 2018-02-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After searching, there are currently no patent reports involving iron-based-ceramic composite powder materials and the preparation of iron-based-ceramic composite thermal insulation coatings by atmospheric plasma spraying (APS)

Method used

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  • Cermet composite material and coating preparation method thereof
  • Cermet composite material and coating preparation method thereof
  • Cermet composite material and coating preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] The mass percentages of raw materials in the iron-based-ceramic composite powder are as follows: Fe-based alloy powder raw materials: ferroboron (B: 18%): 24%, ferroniobium (Nb: 65%): 13%, ferrosilicon (Si: 75%) ): 3%, pure chromium: 17% and pure iron 43%; mixed with YSZ (YSZ accounts for 6% of the total mass). Preparation of iron-based-ceramic composite coating, spraying process parameters: current: 600A, argon flow: 35L / min, hydrogen flow: 10L / min, powder feeding rate: 54g / min, spraying distance: 130mm.

Embodiment 2

[0035] The mass percentages of raw materials in the iron-based-ceramic composite powder are as follows: Fe-based alloy powder raw materials: ferroboron (B: 18%): 24%, ferroniobium (Nb: 65%): 13%, ferrosilicon (Si: 75%) ): 3%, pure chromium: 17% and pure iron 43%; mixed with YSZ (YSZ accounts for 12% of the total mass). Preparation of iron-based-ceramic composite coating, spraying process parameters: current: 600A, argon flow: 35L / min, hydrogen flow: 10L / min, powder feeding rate: 54g / min, spraying distance: 130mm.

Embodiment 3

[0037]The mass percentages of raw materials in the iron-based-ceramic composite powder are as follows: Fe-based alloy powder raw materials: ferroboron (B: 18%): 24%, ferroniobium (Nb: 65%): 13%, ferrosilicon (Si: 75%) ): 3%, pure chromium: 17% and pure iron 43%; mixed with YSZ (YSZ accounts for 18% of the total mass). Preparation of iron-based-ceramic composite coating, spraying process parameters: current: 600A, argon flow: 35L / min, hydrogen flow: 10L / min, powder feeding rate: 54g / min, spraying distance: 130mm.

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Abstract

The invention provides a cermet composite material and a coating preparation method thereof, belongs to the field of thermal spraying in composite materials and surface engineering, and particularly relates to a preparation method for metal-based composite powder with low thermal conductivity and a coating thereof by atmospheric plasma spraying. The method comprises the following steps that iron-based amorphous powder prepared by the high pressure nitrogen gas atomization method is mixed with zirconia powder prepared by the agglomeration sintering method according to a certain mass ratio, andfinally the composite powder with a better sphericity and a particle size of 25-75 [mu]m is obtained. The iron-based-ceramic composite coating is prepared by adopting the atmospheric plasma spraying mode, and the composite coating prepared has relatively low thermal conductivity, and can be used for insulation protection for hot end parts of a diesel engine.

Description

technical field [0001] The invention belongs to the field of thermal spraying in composite materials and surface engineering, and relates to a method for preparing a composite powder and a composite coating thereof, in particular to a method for preparing a metal-based composite powder with low thermal conductivity and a coating thereof by atmospheric plasma spraying Preparation. This patent can be applied to the heat insulation protection of the hot end parts of the diesel engine. Background technique [0002] Diesel engines are widely used and are at the core of the industrial chain. The domestic market demand for diesel engines is also relatively large, especially in agricultural production. As the core component and power output device of a diesel locomotive, the diesel engine plays a decisive role in the performance, energy saving and emission reduction of the vehicle. During the working process of the engine, because the inner surface of the cylinder head and the su...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06B22F1/00
CPCC23C4/134B22F1/0003C23C4/06
Inventor 周正汤凯智姚海华贺定勇谈震王国红王曾洁
Owner BEIJING UNIV OF TECH
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