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Engine cam and production method thereof

A technology of engines and cams, which is applied in the manufacture of tools, valve driving devices, casting and molding equipment, etc., and can solve the problems of low bonding strength of coatings, demanding production equipment, and low production efficiency

Active Publication Date: 2015-04-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the surface coating technology of metal materials includes: laser cladding method, high temperature self-propagating sintering technology, powder metallurgy technology, material vapor deposition technology (including: chemical vapor deposition (CVD), physical vapor deposition (PVD)), etc., but these methods , there are deficiencies such as demanding production equipment, low production efficiency, and low coating bonding strength

Method used

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  • Engine cam and production method thereof
  • Engine cam and production method thereof
  • Engine cam and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The preparation method of engine cam comprises the steps:

[0074] 1. First prepare a titanium plate 2, wherein the purity of titanium should be controlled at 99.7%. The titanium plate 2 should be surface treated first, the steps are as follows:

[0075] The first step is pickling, choose 300ml / L hydrochloric acid, and then rinse with running water;

[0076] In the second step of pickling, choose 300ml / L hydrofluoric acid, and then rinse with running water;

[0077] The third step is surface grinding, using 800 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the titanium plate 2 is controlled at 1 mm.

[0078] 2. According to the size of the engine cam, polystyrene foam is used to make the cam lost foam 7. According to the working force of the cam, the main wear is the strong friction between the surface of the cam and the bottom surface of the tappet. Fix the titanium plate 2 on the surface, and then fix an external carbon s...

Embodiment 2

[0089] The preparation method of engine cam comprises the steps:

[0090] 1. Prepare a titanium plate 2 first, wherein the purity of titanium should be controlled at 99.8%. The titanium plate 2 should be surface treated first, and the steps are as follows:

[0091] The first step is pickling, 60ml / L phosphoric acid, and then rinse with running water;

[0092] The second step is pickling, 200ml / L sulfuric acid, and then rinse with running water;

[0093] The third step is surface grinding, using 1000 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the titanium plate 2 is controlled at 1.5mm.

[0094] 2. According to the size of the cam, polystyrene foam is used to make the lost foam of the cam 7. According to the working force of the cam, the main wear is the strong friction between the surface of the cam and the bottom surface of the tappet. Fix the titanium plate 2, and then fix an external carbon source on the surface of the titani...

Embodiment 3

[0105] The preparation method of engine cam comprises the steps:

[0106] 1. First prepare a titanium plate 2, wherein the purity of titanium should be controlled at 99.8%. The titanium plate 2 should be surface treated first, the steps are as follows:

[0107] The first step is pickling, choose 120ml / L hydrogen peroxide, and then rinse with running water;

[0108] In the second step of pickling, choose 240ml / L hydrogen peroxide, and then rinse with running water;

[0109] The third step is surface grinding, using 1200 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the titanium plate 2 is controlled at 2.5 mm.

[0110] 2. According to the size of the cam, polystyrene foam is used to make the lost foam of the cam 7. According to the working force of the cam, the main wear is the strong friction between the surface of the cam and the bottom surface of the tappet. Fix the titanium plate 2, and then fix an external carbon source on the...

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Abstract

The invention provides an engine cam and a production method thereof. The surface of the work position of the engine cam is provided with a carbide coating, The work position of the surface of the cam is provided with the carbide coating. A quasi monocrystalline TiC dense ceramic layer, a micrometer TiC ceramic layer and a TiC-matrix fusion layer are sequentially distributed in a gradient manner from outside to inside, and are applied to the surface of carbon steel. The carbide coating can be applied to the surface of the carbon steel. The carbide coating is formed on the surface of a matrix through the cast matrix and titanium complex, the introduction of an external carbon source, heating and heat insulation, the coating and the substrate are metallurgically bonded, and the bonding force is very strong, so the problems of non-metallurgic bonding between present hard particles and the steel substrate, very weak bonding force and easy shedding of the particles are overcome, and the wear resistance of the work surface of the cam is greatly improved.

Description

technical field [0001] The invention relates to a composite engine cam with a wear-resistant coating and a preparation method thereof, in particular to a composite engine cam with a wear-resistant carbide coating and a preparation method thereof, in particular to a wear-resistant composite engine cam applied to a carbon steel surface A carbide-coated composite engine cam and a method of making the same. Background technique [0002] The cam is one of the key parts of the car engine, not only bears a certain load, but also suffers from long-term wear and tear, its performance directly affects the quality and life of the car. The cam is an important part of the camshaft. The camshaft is mainly composed of the cam, the supporting journal, and the journal, which are used to control the timely opening and closing of the valves according to a certain working order and gas distribution phase, and to ensure that the valves have sufficient lift. The process has a decisive effect on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22D18/06B22D19/00C23C8/64F01L1/04
CPCB22C9/04B22D18/06B22D19/08F01L1/04
Inventor 许云华赵娜娜梁淑华钟黎声燕映霖叶芳霞王娟邹军涛肖鹏
Owner XIAN UNIV OF TECH
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