Preparation method of high performance vibration damper piston body material

A piston body and shock absorber technology, which is applied in the field of preparation of high-performance shock absorber piston body materials, can solve the problems of short service life, insufficient strength and air tightness of shock absorber pistons, etc., and achieve low manufacturing cost and excellent durability. Wear performance and service life extension effect

Inactive Publication Date: 2018-10-19
JIANGDU LEADER POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an industrialized preparation method of a high-performance shock absorber piston body material to solve the problems of existing shock absorber pistons, such as insufficient strength and air tightness, and short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Fe-0.8%Cu-0.3%C-1%Y 2 o 3 Shock absorber piston body material:

[0023] (1) Add copper sulfate and yttrium sulfate to the hot-rolled steel plate sulfuric acid pickling waste according to the composition ratio to obtain copper and yttrium-containing ferrous sulfate pickling waste, concentrate the pickling waste and pass through the roasting furnace The nozzle is atomized and sprayed into tiny droplets, and roasted at a temperature of 900°C to generate sulfur dioxide gas and co-oxides of iron oxide, copper oxide, and yttrium oxide. The sulfur dioxide gas is recovered to make sulfuric acid for reuse;

[0024] (2) The co-oxide was reduced in a hydrogen atmosphere at 900 °C for 90 min to obtain nano-yttrium oxide dispersion-strengthened iron-copper alloy powder;

[0025] (3) Mix the dispersion-strengthened iron-copper alloy powder with graphene and an appropriate amount of zinc stearate evenly. The length of the graphene in the two-dimensional direction is 1 μm, and the th...

Embodiment 2

[0027] Fe-1.5%Cu-0.6%C-0.2%Y 2 o 3 Shock absorber piston body material:

[0028] (1) Add copper sulfate and yttrium sulfate to the waste sulfuric acid pickling liquid of iron-containing hot-rolled steel plate to obtain ferrous sulfate pickling waste liquid containing copper and yttrium. Concentrate the waste pickling liquid and spray it through the roasting furnace nozzle Spray into tiny droplets and roast at 600°C to generate sulfur dioxide gas and co-oxides of iron oxide, copper oxide, and yttrium oxide. The sulfur dioxide gas is recovered to make sulfuric acid for reuse;

[0029] (2) The co-oxide was reduced in a hydrogen atmosphere at 800 °C for 150 min to obtain nano-yttrium oxide dispersion-strengthened iron-copper alloy powder;

[0030] (3) Mix the dispersion-strengthened iron-copper alloy powder with graphene and an appropriate amount of zinc stearate evenly. The length of the graphene in the two-dimensional direction is 10 μm, and the thickness of the sheet is about...

Embodiment 3

[0032] Fe-1.2%Cu-0.4%C-0.5%Y 2 o 3 Shock absorber piston body material:

[0033] (1) Add copper sulfate and yttrium sulfate to the waste sulfuric acid pickling liquid of iron-containing hot-rolled steel plate to obtain ferrous sulfate pickling waste liquid containing copper and yttrium. Concentrate the waste pickling liquid and spray it through the roasting furnace nozzle Spray into tiny droplets and roast at 750°C to generate sulfur dioxide gas and co-oxides of iron oxide, copper oxide, and yttrium oxide. The sulfur dioxide gas is recovered to make sulfuric acid for reuse;

[0034] (2) The co-oxide was reduced in a hydrogen atmosphere at 850 °C for 120 min to obtain nano-yttrium oxide dispersion-strengthened iron-copper alloy powder;

[0035] (3) Mix the dispersion-strengthened iron-copper alloy powder with graphene and an appropriate amount of zinc stearate evenly. The length of the graphene in the two-dimensional direction is 6 μm, and the thickness of the sheet is about ...

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Abstract

The invention provides a preparation method of a high performance vibration damper piston body material, and belongs to the technical field of powder metallurgy. The preparation method comprises following steps: adding copper sulfate and yttrium sulfate into sulfuric acid pickling liquor of steel rolling to obtain ferrous sulfate pickling liquor containing copper and yttrium; concentrating the pickling liquor, atomizing and spraying the concentrated pickling liquor by the nozzle of a roasting furnace to form droplets; carrying out burning and selective reduction to obtain iron-copper alloy powder enhanced by dispersion of nano yttrium oxide; mixing the iron-copper alloy powder with graphene powder, and pressing and sintering the mixture to obtain the high performance vibration damper piston body material. The preparation method has a low manufacturing cost and is suitable for large scale production. The tensile strength of prepared vibration damper piston body material is 800 MPa or more at a room temperature and the service life is prolonged.

Description

technical field [0001] The invention relates to a preparation method of a high-performance shock absorber piston body material, belonging to the technical field of powder metallurgy. Background technique [0002] The shock absorber piston is a key component to ensure the safety, reliability and comfort of transportation bodies such as automobiles, high-speed trains and ships, especially when subjected to strong alternating impact loads and ultra-high frequency When friction and wear are applied, the impact is quickly relieved, the vibration generated during bumps is absorbed, and the driving state is restored to a smooth state. As automobiles, high-speed trains, ships, etc. have more and more strict requirements on the power, economy, environmental protection and reliability of shock absorbers, the key materials of pistons must have high strength and excellent friction and wear properties to ensure the piston's Wear resistance, smooth guiding and good sealing function, re...

Claims

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Application Information

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IPC IPC(8): C22C38/16B22F9/22C22C33/02
CPCC22C33/0228C22C33/0264C22C38/16B22F9/22B22F2999/00B22F2998/10B22F3/1007B22F2201/20B22F2201/013B22F2201/016B22F1/10B22F3/02
Inventor 葛莲郝俊杰陈存广李永春
Owner JIANGDU LEADER POWDER METALLURGY
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