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Preparation method for powder metallurgy for automotive brake valve block

A powder metallurgy, brake valve technology, applied in other manufacturing equipment/tools, engine components, turbines, etc., can solve the problems of product density molding machine and mold loss, affecting manufacturing cost, difficult to detect, etc. Achieve the effect of improving wear resistance, changing bonding morphology and pore shape, and solving cracks

Inactive Publication Date: 2015-07-08
XUZHOU DALT MECHANICAL EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material composition affects the manufacturing cost, the product density has a great influence on the loss of the molding machine and the mold, and the crack is mainly affected by the strength of the compact, and it is difficult to detect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a vehicle brake valve plate powder metallurgy, which comprises the following steps:

[0026] (1) Ingredients: The vehicle brake valve plate is made of the following raw materials in weight percentage:

[0027] 0.4% nickel, 0.4% cerium, 0.4% chromium, 0.6% corundum powder, 0.8% zinc, 1% manganese, 1% graphite powder, 2% copper, 2% modification additives, the rest for iron;

[0028] Described modification auxiliary agent is to be made from the raw material of following weight part:

[0029] Nano iron powder 100, calcium hydroxide 40, stearic acid 40, dicumyl peroxide 8, polyethylene vinyl acetate 10, potassium feldspar powder 4, fatty alcohol polyoxyethylene ether 3, liquid paraffin 4, γ- Aminopropyltriethoxysilane 0.8, appropriate amount of water;

[0030] The preparation method of described modification auxiliary agent comprises the following steps:

[0031] A. Add the above-mentioned calcium hydroxide in parts by weight to water of equal mass...

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Abstract

The invention discloses a preparation method for powder metallurgy for an automotive brake valve block. The preparation method includes that the automotive brake valve slice is made from raw materials, by weight percentage, 0.2-0.4% of nickel, 0.2-0.4% of cerium, 0.2-0.4% of chromium, 0.4-0.6% of emery powder, 0.6-0.8% of zinc, 0.8-1% of manganese, 0.8-1% of graphite powder, 1-2% of copper, 1-2% of performance additives and the balance ferrum. By adding the performance additives, superfine powder in mixed materials can be filled in gaps between large particles, so that apparent density of the mixed materials is improved; since main ingredients of the superfine powder are nano ferrum powder and calcium stearate and novel performance additives obtained from additives of silane coupling agent and the like further improves various physical properties of wear resistance and the like of products; and polyethylene vinyl acetate and liquid paraffin are added into the performance additives as lubricant, so that efficiency of the performance additives in mixed suppression is enhanced, pressing intensity of powder metallurgical parts under the same pressing pressure is greatly improved, particle combination forms and pore configurations of the raw materials are changed, and the problem caused by cracks is totally solved.

Description

technical field [0001] The invention mainly relates to a powder metallurgy preparation method of a vehicle brake valve plate, which belongs to the field of casting. Background technique [0002] With the continuous development of my country's economy, powder metallurgy structures are used more and more widely. As a near net shape technology, powder metallurgy has great economic advantages in the production of structural parts and other parts with large batches, high dimensional accuracy and high processing costs. However, there is a weakness in powder metallurgy structural parts: the compact strength of the product before sintering is very low, which leads to cracks easily appearing during the forming and handling process, and cannot be detected during the manufacturing process. This is a fatal defect in some applications such as key parts of automobiles, which leads to the application of powder metallurgy structural parts only to low- and medium-risk stress-bearing par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F5/00
Inventor 吴建平
Owner XUZHOU DALT MECHANICAL EQUIP MFG CO LTD
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