Core rod for powder metallurgy and machining process thereof

Abstract

The invention discloses a core rod for powder metallurgy, and belongs to the technical field of core rods for powder metallurgy. The core rod comprises a core rod body, wherein a plating layer is arranged at the upper end of the core rod body. The invention further discloses a machining process of the core rod for powder metallurgy. The core rod body is made of die steel DC53, the characteristicsof good machinability and high toughness of the die steel are utilized, the core rod body with any shape and size can be machined, the problem of connection in the machining process of the core rod body can be avoided, so that the application range of machining is effectively expanded, and the machining period is shortened; the plating layer is arranged at the upper end of the core rod body, the plating layer is a thermal diffusion method carbide coating, the wear resistance and the surface roughness of the forming surface of the core rod body are improved, and the requirements of a productionproduct are met; and the toughness of the core rod body is guaranteed, the bending resistance of the core rod body after being pressed is improved, so that the physical performance of the core rod body is guaranteed, and the service life of the core rod body is prolonged.

Description

technical field [0001] The invention belongs to the technical field of mandrels for powder metallurgy, and in particular relates to a mandrel for powder metallurgy and a processing technology thereof. Background technique [0002] Powder metallurgy is mainly suitable for production and research in the fields of automobile industry, metal industry, instrumentation, electronic home appliances, etc. It can be directly made into porous, semi-dense or fully dense materials and products, and the products involve oil-impregnated bearings, gears, cams, and guide rods. , knives, etc., is a less cutting process. The powder metallurgy mold will put a lot of pressure on the mold itself during the process of pressing the metal powder, so the structure of the mold design directly affects the cracking and damage of the mold during work, affecting the service life and production cost. Therefore, the mold mandrel that participates in the molding needs to improve the hardness and surface wea...

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Problems solved by technology

[0003] However, the currently commonly used mandrel processing methods cannot be applied to small-sized and complex-shaped mandrels; the upper end of the mandrel must be made of alloy material to achieve the effect of surface roughness and wear resistance, and the scope of application is not comprehensive enough.

[0004] In addition, there is also a process in which the mandrel is made of alloy material as a whole, but the mandrel itself is generally slender, and the alloy material is high in hardness and brittle. Improper processing can easily lead to alloy cracking, chipping, etc., and the processing cost and difficulty are high.

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