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Wear-resistant coating for big end inner hole of thermal spraying engine connecting rod

A technology of engine connecting rod and wear-resistant coating, which is applied in the direction of coating, metal material coating process, melt spraying, etc. low effect

Inactive Publication Date: 2020-04-28
云南云内动力机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional engine connecting rod adopts the bearing bush method to form a sliding friction pair with the crankshaft. The bearing bush is an important sliding bearing in a modern internal combustion engine and a very important frictional part in the engine. Due to the influence of manufacturing errors, especially the influence of high radius, The gap formed between the bearing bush and the crankshaft is relatively large. In order to form an optimal oil film thickness, there are cases where the crankshaft and the bearing bush are grouped in size, which greatly increases the difficulty of the process.

Method used

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  • Wear-resistant coating for big end inner hole of thermal spraying engine connecting rod

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A wear-resistant coating for the inner hole of the large end of the thermal sprayed engine connecting rod, which is composed of the following materials in mass percentage: Sn 4.5-25%, Si 1.2-11%, Cu 0.4-2%, Pb 1-2.8%, Ni 0.7- 1.3%, Cr 0.1-0.5%, the balance is Al.

Embodiment 2

[0018] A wear-resistant coating for the inner hole of the large end of the thermal sprayed engine connecting rod, which is composed of the following materials in mass percentage: Zn 3-63%, Si 0.2-3.0%, Cu 0.4-4.0%, Pb 1-2.8%, Mn 0.2- 0.5%, Mg 0.4-0.7%, the balance is Al.

Embodiment 3

[0020] A heat-sprayed wear-resistant coating for the inner hole of the large end of the engine connecting rod is composed of the following materials in mass percentage: Zn 2.0-8.0%, Pb 1.0-27.0%, Sn 0.3-11.0%, and the balance is Cu.

[0021] The invention uses thermal spraying aluminum-based, aluminum-zinc-based and copper-based wear-resistant coatings to replace the engine connecting rod of the traditional engine bearing bush, has excellent process performance, compact structure, can reduce product cost, simplify assembly process, and improve production efficiency.

[0022] The wear-resistant coating sprayed on the inner holes of the connecting rod body 1 and the connecting rod cover 5 may be the same wear-resistant coating material in the above embodiments, or may be a combination of different types of wear-resistant coating materials.

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Abstract

The invention discloses a wear-resistant coating for a big end inner hole of a thermal spraying engine connecting rod, aims at providing a wear-resistant coating for a big end inner hole of a thermalspraying engine connecting rod with simple manufacturing process. The wear-resistant coating is composed of the following materials in percentage by mass: 4.5-25% of Sn, 1.2-11% of Si, 0.4-2% of Cu, 1-2.8% of Pb, 0.7-1.3% of Ni, 0.1-0.5% of Cr and the balance of Al. The wear-resistant coating has excellent process performance and compact structure, can reduce product cost, simplify assembly process and improve production efficiency.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a wear-resistant coating on the inner hole of the large head of a thermal sprayed engine connecting rod. Background technique [0002] The traditional engine connecting rod adopts the bearing bush method to form a sliding friction pair with the crankshaft. The bearing bush is an important sliding bearing in a modern internal combustion engine and a very important frictional part in the engine. Due to the influence of manufacturing errors, especially the influence of high radius, The gap formed between the bearing bush and the crankshaft is relatively large. In order to form an optimal oil film thickness, there is a situation that the crankshaft and the bearing bush are grouped by size, which greatly increases the difficulty of the process. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/08C22C21/00C22C21/02C22C21/10C22C21/18C22C9/02C22C9/04C22C9/08
CPCC22C9/02C22C9/04C22C9/08C22C21/003C22C21/02C22C21/10C22C21/14C22C21/16C22C21/18C23C4/06C23C4/08
Inventor 谭俊湘陈友才刘智杰王润李静文李建林李昊明牛泽良
Owner 云南云内动力机械制造有限公司