Method for preparing TiB2-Co coating by supersonic-speed flame spraying

A supersonic flame, tib2-co technology, applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of poor substrate bonding, low deposition efficiency, high cost, etc., and achieve good mechanical properties and wear resistance Good performance and low porosity

Inactive Publication Date: 2012-02-29
JIUJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many researchers often use vacuum plasma spraying or low pressure plasma spraying to prepare TiB 2 Ceramic coating, but these two spraying methods are expensive, and limited by the size of the vacuum chamber, large samples cannot be sprayed
Preparation of TiB by Atmospheric Plasma Spraying 2 Ceramic coating is a more economical way, however TiB 2 The kinetic energy of the hig

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In this example, supersonic flame spraying is used to prepare a wear-resistant coating, and TiB is obtained by mechanical alloying. 2 - Co composite powder, prepare the pre-treated parts to be sprayed, and finally carry out supersonic flame spraying.

[0018] First, TiB with a particle size of 15-45 μm 2 powder and Co-based alloy powder as raw materials, TiB 2 Powder and Co-based alloy powder are mixed according to the mass percentage of 3:1, and then the stainless steel balls with a ball-to-material ratio of 10:1 and the mixed powder are put into a ball mill ball mill tank in a glove box filled with argon, and the balls The material mixture accounts for 30%-50% of the inner volume of the stainless steel ball mill tank, and then ball mills at room temperature at a speed of 440 rpm for 6 hours to form TiB 2 Cermet mixed powder with Co-based alloy powder. Secondly, the surface of the parts with spray coating should be uniform and rough after being sandblasted, and a co...

Embodiment 2

[0026] In this example, supersonic flame spraying is used to prepare a wear-resistant coating, and TiB is obtained by mechanical alloying. 2 - Co composite powder, prepare the pre-treated parts to be sprayed, and finally carry out supersonic flame spraying.

[0027] First, TiB with a particle size of 15-45 μm 2 powder and Co-based alloy powder as raw materials, TiB 2 Powder and Co-based alloy powder are mixed according to the mass percentage of 3:1, and then the stainless steel balls with a ball-to-material ratio of 10:1 and the mixed powder are put into a ball mill ball mill tank in a glove box filled with argon, and the balls The material mixture accounts for 30%-50% of the inner volume of the stainless steel ball mill tank, and then ball mills at room temperature at a speed of 440 rpm for 6 hours to form TiB 2 Cermet mixed powder with Co-based alloy powder. Secondly, the surface of the sprayed parts after sandblasting should be uniform and rough, and a coating with a thick...

Embodiment 3

[0035] In this example, a wear-resistant coating was prepared by supersonic flame spraying and obtained by mechanical alloying to obtain TiB 2 - Co composite powder, prepare the pre-treated parts to be sprayed, and finally carry out supersonic flame spraying.

[0036] First, TiB with a particle size of 15-45 μm 2 powder and Co-based alloy powder as raw materials, TiB 2 Powder and Co-based alloy powder are mixed according to the mass percentage of 3:1, and then the stainless steel balls with a ball-to-material ratio of 10:1 and the mixed powder are put into a ball mill ball mill tank in a glove box filled with argon, and the balls The material mixture accounts for 30%-50% of the inner volume of the stainless steel ball mill tank, and then ball mills at room temperature at a speed of 440 rpm for 6 hours to form TiB 2 Cermet mixed powder with Co-based alloy powder. Secondly, the surface of the sprayed parts after sandblasting should be uniform and rough, and a coating with a t...

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Abstract

The invention discloses a method for preparing a wear-resistant TiB2-Co coating by supersonic-speed flame spraying. Metal ceramic mixed TiB2-based and Co-based alloying powder is formed by performing ball-milling by mechanical alloying at room temperature at the rotation speed of 440 revolutions per minute for six hours; the surface of a piece to be sprayed which is obtained after sand blasting is uniform and coarse; a coating of which thickness is 150 to 200mu m is sprayed on the piece to be sprayed; supersonic-speed flame spraying process parameters are specifically that: oxygen pressure is 1.02Mpa, propane pressure is 0.4 to 0.6Mpa, nitrogen pressure is 0.65Mpa, oxygen flow is 10 to 12.5m<3>h, propane flow is 1,100 to 1,200L/min, nitrogen flow is 1,000 to 1,100L/miunm, vertical speed of a spraying area is 50mm/s, and horizontal speed of the spraying area is 170mm/s, and spraying distance is 185mm; and the invention has the advantages that the TiB2-Co coating which has high wear resistance can be obtained by performing supersonic-speed flame spraying of TiB2-Co composite metal ceramic powder. The TiB2-Co coating has a good mechanical property, and a compact layer structure, is low in porosity.

Description

technical field [0001] The invention relates to coating preparation technology, in particular to a supersonic flame spraying preparation of wear-resistant TiB 2 -Co coating method is to prepare TiB by mechanical alloying 2 - Co spraying composite powder, using supersonic flame spraying technology to prepare wear-resistant TiB 2 -Co coating method. Background technique [0002] The surface wear of components is the main form of failure. Among the failed mechanical components, the failure caused by abrasive wear accounts for about 40%. The wear resistance of materials can be improved by surface modification and toughening of parts, which is the key to improving product quality and important method of longevity. The cermet composite material composed of a hard ceramic phase and a metal or alloy binder phase with good plasticity and toughness not only has the high hardness and wear resistance of ceramic materials, but also has a certain toughness. It is a commonly used surfac...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/06C23C4/129
Inventor 陈枭李丹温雨
Owner JIUJIANG UNIVERSITY
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