Integrated exhaust gas sintering method and tooling for implementing the method

Abstract

An exhausting and sintering integration method comprises the steps that a rough piece to be sintered is placed in a sintering boat to be sintered, the sintering boat is provided with an exhaust port, an exhaust conduction structure is arranged in the sintering boat, the outer wall outline is arranged to adapt to the inner cavity outline of the rough piece, an exhaust cavity is formed in the exhaust conduction structure and communicated with the outside world, exhaust holes which are formed in the surface of the exhaust conduction structure are communicated with the exhaust cavity, positioning is conducted on the exhaust conduction structure and the rough piece, sintering sand is laid on and filled into the sintering boat to exceed the top of the rough piece, and heating sintering and cooling are conducted. The invention provides an exhausting and sintering integration tool which implements the exhausting and sintering integration method. The tool comprises the sintering boat, the exhaust conduction structure, and the exhaust port is formed in the sintering boat; the exhaust conduction structure is installed in the sintering boat and comprises the exhaust cavity which is communicated with the outside world, the surface of the exhaust conduction structure is provided with exhaust through holes, and the outer wall outline of the exhaust conduction structure adapts to the inner cavity outline of the rough piece.

Description

technical field [0001] The invention relates to an integrated exhaust sintering method for blank parts and a tool for implementing the method. Background technique [0002] Powder metallurgy is a high-efficiency, high-quality, precise, low-consumption and energy-saving near-net-shape part manufacturing technology. However, powder metallurgy technology needs to add binders when manufacturing parts to improve the fluidity of the powder during the compression molding process. At the same time, the powder has a higher viscosity, so that the pressing pressure can be transmitted more effectively and evenly in the powder. Adding a binder can improve the fluidity, filling and formability of the mixed powder, and the powder can evenly flow to all corners during the pressing process without cracks, so that highly complex geometric shapes can be made. In the process of powder sintering and molding, at high temperature, the binder will decompose or gasify from the blank, so that the pa...

AI Technical Summary

Problems solved by technology

[0003] At present, in the degassing and sintering technology of blank parts, first of all, the degassing and sintering are divided into two separate steps of tooling, and secondly, in the existing degassing and sintering technology, it is generally found that the blank part In high temperature environment, different degrees of deformation often occur, and then defective products appear; if a support structure is added to the blank, it is found that the wall in contact between the blank and the support structure will have different degrees of deformation due to poor exhaust. Pores, cracks, uneven density, etc., especially when the blank has an inner cavity structure, the problems caused by poor exhaust are more serious

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