Preparation method of CuSnNiP-based copper alloy lubricating friction-resistant material by liquid-phase sintering method

Abstract

The embodiment of the invention discloses a preparation method of a CuSnNiP-based copper alloy lubricating friction-resistant material by a liquid-phase sintering method, and particularly relates to the field of powder metallurgy. The preparation method comprises the following steps that firstly, CuSn8NiP copper powder atomized by water flow or air flow is selected; and secondly, 0.02-4 wt% of low-melting-point metal such as tin powder Sn or low-melting-point metal alloy powder is added into the copper alloy powder CuSn8NiP alloy, and the copper alloy powder in which the low-melting-point metal is added is fully mixed and stirred evenly in a mixer for 0.5-3 h. According to the preparation method of the CuSnNiP-based copper alloy lubricating wear-resistant material by the liquid-phase sintering method, a copper alloy layer of a copper-steel alloy lubricating wear-resistant material prepared by the method has the advantages of good contractibility, a low void ratio, relatively good compactness, high strength and good mechanical fatigue resistance; and the copper-steel alloy lubricating wear-resistant material prepared by the liquid-phase sintering method has specific metallurgical metallographic characteristics.

Description

technical field [0001] The embodiment of the present invention relates to the field of powder metallurgy, in particular to a preparation method of a CuSnNiP-based copper alloy lubricating and friction-resistant material by a liquid phase sintering method. Background technique [0002] The further improvement of the emission standards of automobiles makes the automobile engine have a higher cylinder pressure ratio, so that it has higher fuel efficiency and lower exhaust emissions. The push piece and so on put forward higher requirements, and need to have higher strength, fatigue resistance and friction and wear resistance. [0003] When the friction-resistant material is prepared by the traditional powder-coating sintering and rolling method, only solid-phase sintering occurs between the copper alloy powder particles and no liquid-phase sintering occurs, so the copper alloy layer of the prepared steel-copper alloy is not sufficiently The metallographic porosity obtained by c...

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a method for preparing CuSnNiP-based copper alloy lubricating and friction-resistant materials by liquid phase sintering method. By introducing intergranular liquid phase, the shrinkage rate of copper alloy powder is increased by liquid phase sintering method to reduce the The porosity of the layer is improved to improve the mechanical strength and fatigue resistance, so as to solve the problem that the copper alloy layer of the steel-copper alloy in the prior art is not sufficiently shrunk to obtain a high metallographic porosity, which makes the strength and fatigue resistance of the material uniform. lower question