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High-strength high-wear-resistance valve plate and preparation method thereof

A high-wear, high-strength technology, used in earthmovers/shovels, construction, etc., can solve problems such as insufficient hardness and strength, poor plastic deformation resistance, and copper adhesion, and achieve premature wear and tear. Effects of burns, good strength and abrasion resistance

Active Publication Date: 2011-11-23
龙工(上海)精工液压有限公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, if pure copper is used, the corresponding ability to resist plastic deformation is relatively poor, and the ability to resist the embedding of foreign abrasive particles is also relatively low.
Therefore, the valve plate using pure copper material will deform during movement, which is very easy to cause premature "copper sticking" and wear
Compared with double-alloy sintered materials, the deformation will be relatively better, because it contains iron-based materials, but the upper copper alloy layer has a large amount of copper, so the hardness and strength are not enough, and it is relatively easy to "stick to copper".

Method used

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  • High-strength high-wear-resistance valve plate and preparation method thereof

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Embodiment 1

[0015] A high-strength and high-wear-resistant distribution plate, including an iron substrate, on which an electroplated copper layer and a copper alloy sintered layer are sequentially formed, and the copper alloy sintered layer is made of the following raw materials in weight percentage: Zn 0.135%, Pb 14%, Sn 6%, Fe 0.5%, Si 0.26%, Se 0.085%, P 0.008%, Ag 0.00365%, Cr 0.005%, S 0.06%, As 0.15%, Bi 0.035%, Al 0.003 %, Au 0.0045%, Zr 0.010%, B 0.0002%, C 0.085%, Nb 0.0008%, Ti 0.007%, Mn 1ppm, Be 1ppm, Sb 2ppm, Co 1ppm, Pt 1ppm and the balance of Cu.

[0016] The preparation method is as follows: 1. Prepare the iron substrate. The purchased material is S45C iron-based steel plate or round steel for machining. Generally, it is processed into a round cake shape, and the thickness is determined according to the final thickness of the part. After processing, it is required that the flatness of the surface to be sintered should be ≤0.05mm, and the roughness (smooth finish...

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Abstract

The invention provides a high-strength high-wear-resistance valve plate and a preparation method thereof. The high-strength high-wear-resistance valve plate comprises an iron base plate, and is characterized in that a copper plating layer and a copper alloy sintered layer are sequentially formed on the iron base plate; and the copper alloy sintered layer is prepared from 0.125-0.145% of Zn, 13-15% of Pb, 5-7% of Sn, 0.4-0.6% of Fe, 0.25-0.28% of Si, 0.07-0.1% of Se, 0.007-0.009% of P, 0.0035-0.0038% of Ag, 0.004-0.006% of Cr, 0.05-0.07% of S, 0.1-0.2% of As, 0.03-0.04% of B and the like. The invention has high strength and wear resistance.

Description

technical field [0001] The invention relates to a new material of a flow plate in the friction pair of a flow plate and a cylinder body and a preparation method thereof, and belongs to the technical field of excavator accessories. Background technique [0002] Various types of excavator machinery are widely used in civil, transportation, water conservancy projects, mining and mechanized construction of modern military projects. Single-bucket hydraulic excavators are mainly composed of working devices (including booms, sticks and buckets), slewing and traveling mechanisms. For crawler hydraulic excavators, the traveling mechanism is driven by two hydraulic motors without outriggers. In the axial piston travel motor, the flow distribution mechanism formed by the rotating cylinder and the flow distribution plate is a pair of friction pairs. In order to make it work stably under the required working conditions, it should not only be able to withstand huge pressing force, but a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/08B22F7/04E02F9/22
Inventor 陈超汪锋余红波李美钗
Owner 龙工(上海)精工液压有限公司
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