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A kind of methanol engine timing chain pin shaft vanadium infiltration agent and vanadium infiltration process

A methanol engine, vanadium infiltration technology, applied in metal material coating process, manufacturing tools, furnaces and other directions, can solve the problems of corrosion resistance, alcohol resistance, acid resistance, poor wear resistance, affecting the service life of the engine, and chain wear and elongation. , to enhance wear resistance and shear resistance, avoid chain wear and elongation or breakage, and improve surface hardness

Active Publication Date: 2022-07-15
ZHEJIANG GEELY HLDG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The timing chain made by the traditional chromizing process has poor corrosion resistance, alcohol resistance, acid resistance, and wear resistance, which cannot meet the conditions of methanol environment and long-distance conditions of more than 750,000 kilometers, and the chain is prone to abnormal wear, elongation, and fracture , affecting the service life of the engine

Method used

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  • A kind of methanol engine timing chain pin shaft vanadium infiltration agent and vanadium infiltration process
  • A kind of methanol engine timing chain pin shaft vanadium infiltration agent and vanadium infiltration process

Examples

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Embodiment 1

[0032] A vanadium penetration agent for a timing chain pin shaft of a methanol engine, comprising ferrovanadium powder, alumina, aluminum powder and rare earth iodide, the mass percentages of each component are: ferrovanadium powder 40-60%, alumina 30-40% , 3 to 5% of aluminum powder, 3 to 5% of rare earth iodide, rare earth iodide is used to promote vanadium infiltration of pins. By using rare earth iodide as the penetration enhancer, it replaces the use of rare earth chloride as the penetration enhancer in the prior art, which helps to reduce the cracks of the infiltration layer on the surface of the pin shaft, achieves the thickness of the infiltration layer that meets the requirements of long mileage, and improves the sales volume. The wear resistance of the shaft increases the service life of the pin shaft.

Embodiment 2

[0034] like figure 1 As shown, a kind of methanol engine timing chain pin shaft vanadium infiltration process is realized based on the vanadium infiltration agent in Example 1, and the process flow steps are as follows:

[0035] S101: Derusting the pin shaft;

[0036] S102: add solvent oil and stir fully (prevent vanadium penetration agent and pin shaft from sticking);

[0037] S103: add the prepared vanadium infiltrating agent according to the mass ratio of vanadium infiltrating agent and pin shaft 1:1, fully stir 6 times and then seal the tank and seal;

[0038] S104: Put the sealed tank into a sealed furnace and heat it to T1°C, fill it with nitrogen, and evacuate the impurity gas; the set value of T1 ranges from 180°C to 200°C, preferably 200°C.

[0039] S105: heating to T2°C for 10 hours; T2 set value range is 950-1000°C, preferably 970°C.

[0040] S106: cooling with the furnace to T3 °C, then adding a cooling cover to force cooling to T4 °C, then air-cooling to room t...

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Abstract

The invention relates to a vanadium infiltrating agent for a timing chain pin of a methanol engine, which comprises ferrovanadium powder, alumina, aluminum powder and rare earth iodide. ~40%, aluminum powder 3~5%, iodide rare earth 3~5%. A process for vanadium infiltration of a timing chain pin of a methanol engine. Put it into a sealed furnace and heat it to T1°C, fill it with nitrogen to remove the impurity gas, heat it to T2°C and keep it for 1 hour, then cool it to T3°C with the furnace, then add a cooling cover to force cooling to T4°C, then air-cool to room temperature, and open the furnace. , quenched at T5°C, and then tempered at T6°C after slow polishing for more than or equal to 96 hours. Through this vanadium infiltration process, a good surface vanadium infiltrated layer is obtained, which meets the requirements for wear resistance under long-mileage conditions; life.

Description

technical field [0001] The invention relates to the field of automobile parts manufacturing, in particular to a vanadium infiltration agent and a vanadium infiltration process for a timing chain pin of a methanol engine. Background technique [0002] Due to the rapid development of the chain industry and the continuous improvement of parts' requirements for wear resistance, corrosion resistance, high temperature oxidation and other properties, the development of the surface strengthening process of parts has been promoted. Among them, the development and application of metal infiltration on the surface of parts is particularly rapid. In order to meet the increasingly rapid development of the high requirements for the special properties of the material surface, many new surface treatment methods have been developed. Among them, the infiltration of vanadium, niobium, button and infiltration in the borax bath developed by the Toyota Central Research Institute in Japan Chromium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/36C23C10/60C21D1/18C21D9/28
CPCC23C10/36C23C10/60C21D1/18C21D9/28
Inventor 刘岩洪安新蒋仁杰刘向阳朱友贵宋金环陆晓锋王瑞平
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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