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Power metallurgy iron-based engine valve seat and production method thereof

An engine valve, powder metallurgy technology, applied in the field of powder metallurgy, can solve the problems of increased product cost, low hardness, complex process, etc., and achieves the effects of low manufacturing cost, stable quality and performance, and cost reduction

Inactive Publication Date: 2014-02-05
WUHU HONGKUN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent has passed nitriding and secondary aging treatment, the hardness is still not high, and the process is too complicated, which increases the product cost

Method used

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Embodiment Construction

[0017] specific implementation plan

[0018] The present invention will be described in detail below through specific examples.

[0019] A powder metallurgy iron-based engine valve seat, made of the following raw materials in parts by weight (kg): graphite 2.4, tungsten 3.2, molybdenum 5.0, cobalt 2.3, chromium 7.4, copper powder 0.4, iron powder 86, V 1.5, Tc 0.4, Y 0.5, additive 2;

[0020] The auxiliary agent is made of the following raw materials in parts by weight (kg): iron powder 30, aluminum hydroxide 2, zinc sulfate 1, medical stone 1, nano-carbon 1, jade 2, polyisobutylene 2, aluminate couple Coupling agent DL-411 1. Silicon carbide powder 2; the preparation method is to mix iron powder, aluminum hydroxide, zinc sulfate and medical stone, grind them into 200-300 mesh powder, and then add aluminate coupling agent DL-411 Mix evenly, press it into a blank at 10-15Mpa, then send it to 920-950°C for calcination for 3-4 hours, after cooling, crush it into 300-400 mesh po...

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Abstract

The invention discloses a power metallurgy iron-based engine valve seat. The power metallurgy iron-based engine valve seat is characterized by being made with, by weight, 2.4-2.8 parts of graphite, 3.2-3.4 parts of tungsten, 5.0-5.2 parts of molybdenum, 2.3-2.8 parts of cobalt, 7.4-7.6 parts of chromium, 0.4-0.8 part of copper powder, 86-88 parts of iron powder, 1.5-2.1 parts of V, 0.4-0.8 part of Tc, 0.5-0.8 part of Y, and 2-3 parts of aid. The power metallurgy iron-based engine valve seat is high in hardness, good in wear resistance, stable in quality performance, low in production cost and long in service life, allows an internal combustion engine to normally operate with leadless gasoline, and the cost of using the valve seat is reduced for users.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy iron-based engine valve seat and a preparation method thereof. Background technique [0002] Due to the demand for environmental protection, unleaded gasoline has been gradually used in China, which puts forward higher requirements on the wear resistance of the valve seat of the internal combustion engine. If the cast iron alloy valve seat is still used, the valve seat is easy to wear and the service life is not long. Long, there is a gap between the valve and the valve seat due to severe wear, so that the working surface between the valve and the valve seat cannot be kept in good agreement, so that the intake and exhaust of the cylinder are not normal, which directly reduces the efficiency of the internal combustion engine. output power, when the valve seat is severely worn, it will cause the internal combustion engine to fail to work normally. [0003] A pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/00C22C38/30B22F3/16
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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