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Preparation method of automobile engine crankshaft through powder metallurgy

An automotive engine, powder metallurgy technology, applied in engine components, mechanical equipment, other manufacturing equipment/tools, etc., can solve problems such as oil-free lubrication that cannot be fully realized, and achieve the effect of good gloss, long service life, and not easy to break

Inactive Publication Date: 2016-04-13
WUHU HONGKUN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the final product still belongs to the oil-lubricated technology, and the oil-free lubrication technology cannot be fully realized.

Method used

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Comparison scheme
Effect test

Embodiment Construction

[0014] Below in conjunction with specific embodiment, further illustrate the present invention, it should be understood that these embodiments are only for illustrating the present invention

[0015] A method for preparing a powder metallurgy automobile engine crankshaft, comprising the following process steps:

[0016] 1) Raw material preparation, consisting of the following raw materials in parts by weight: iron powder 70-72, molybdenum powder 1.3-1.8, zinc oxide 1.3-1.8, stearic acid 4.5-5.5, tantalum carbide 1.4-1.8, silicon nitride 1.4- 1.6, nickel powder 1.2-1.5, tungsten powder 2.2-3.4, cerium fluoride 1.5-1.9, graphite powder 0.3-0.5, inhibition phase 1.3-1.6, lubricant 1.5-1.8, the inhibition phase is made of the following raw materials in mass percentage Composition: 4-7% NbC, 20-22% VC and 13-15% TaC, 8-10% graphene, the balance is carbon powder;

[0017] 2) Put the above-mentioned raw material powder into the mould, mix and stir the raw material powder at 150-160°...

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Abstract

The invention discloses a preparation method of an automobile engine crankshaft through powder metallurgy. The preparation method comprises the following process step of preparation of the following raw materials in parts by weight: 70-72 parts of iron powder, 1.3-1.8 parts of molybdenum powder, 1.3-1.8 parts of zinc oxide, 4.5-5.5 parts of stearic acid, 1.4-1.8 parts of tantalum carbide, 1.4-1.6 parts of silicon nitride, 1.2-1.5 parts of nickel powder, 2.2-3.4 parts of tungsten powder, 1.5-1.9 parts of cerium fluoride, 0.3-0.5 part of graphite powder, 1.3-1.6 parts of an inhibition phase and 1.5-1.8 parts of a lubricant, wherein the inhibition phase is prepared from the following raw materials in percentage by mass: 4-7% of NbC, 20-22% of VC, 13-15% of TaC, 8-10% of graphene and the balance being carbon powder. The preparation method disclosed by the invention has the advantages that a special proportioning of the raw materials is adopted, so that the performance index of produced products is high, the lustrousness is good, the stability is high, the phenomena of cracks and the like are not liable to occur, and the service life is long.

Description

technical field [0001] The invention relates to the field of engine crankshaft preparation, in particular to a powder metallurgy automobile engine crankshaft preparation method. Background technique [0002] The current powder metallurgy crankshaft technology is mainly through mixing, forming, sintering and shaping, secondary sintering, heat treatment, finishing, oil immersion and other processes, and in some parts with low speed and low load requirements, it can completely combine oil-free Lubrication characteristics to achieve oil-free lubrication. However, this technology cannot be realized in the field of powder metallurgy. [0003] Also there is technology to propose a kind of oil-free lubricating method that is used for powder metallurgy to manufacture engine crankshaft recently, and it mainly is to add graphite, molybdenum disulfide, copper and engine oil composition in iron powder. However, its final product still belongs to oil-lubricated technology, and oil-free ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F3/02B22F3/10B22F3/24
CPCB22F5/00B22F3/02B22F3/1007B22F3/24B22F2003/023B22F2003/248B22F2005/005B22F2998/10B22F2999/00B22F2201/20
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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