Graphite boat and graphite boat group for hard alloy sintering technology

A graphite boat and cemented carbide technology, which is applied in the field of tools, can solve the problems of uneven atmosphere, unstable sintered product quality, and poor removal of molding agents, and can ensure product performance, uniform atmosphere density distribution, and product composition. uniform effect

Active Publication Date: 2012-10-24
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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Problems solved by technology

The biggest disadvantage of the above two kinds of graphite boats is that the atmosphere is not uniform, and the forming agent is not removed smoothly, which is mainly manifested in: there is a big difference in performance between the product close to the atmosphere flow channel and the product far away from the atmosphere flow channel, so that the quality of the sintered product is not good. Stablize

Method used

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  • Graphite boat and graphite boat group for hard alloy sintering technology
  • Graphite boat and graphite boat group for hard alloy sintering technology
  • Graphite boat and graphite boat group for hard alloy sintering technology

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Embodiment Construction

[0026] figure 1 and figure 2 Shown is a kind of graphite boat embodiment that is used for cemented carbide sintering of the present invention, and this graphite boat comprises the disc-shaped graphite boat body that is surrounded by sidewall 2 and bottom plate 1, and this graphite boat body is circular shape, and several through holes 3 are evenly arranged on the bottom plate 1. This structure can not only meet the requirements for gas fluidity in the process of sintering cemented carbide, but also make the atmosphere density distribution inside the graphite boat uniform, so that the sintering The distribution of various components in the formed product is more uniform, and the product quality is more stable.

[0027] The diameter of the through hole 3 is d, 0.2≤d≤6mm, and the preferred value range of the diameter d is 0.5mm≤d≤3mm. The distance n between the central axes of two adjacent through holes 3 is 1.1 to 10 times the diameter d of the through hole, and the preferred...

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Abstract

The invention discloses a graphite boat for hard alloy sintering, which comprises a disc-shaped graphite boat body enclosed by a side wall and a bottom plate, wherein a plurality of through holes are uniformly arranged on the bottom plate. The graphite boat for the hard alloy sintering has the advantages of simple structure, convenient manufacture, uniform distribution of the intensity of the interior atmosphere, and quality stability enhancement of the product. The invention also discloses a graphite boat group formed by overlying more than two graphite boats for the hard alloy sintering in a layer-upon-layer mode, wherein a step arranged at the bottom edge of the bottom plate of the upper layer of the graphite boat is arranged on the side wall of the adjacent lower layer of the graphiteboat.

Description

technical field [0001] The invention relates to a tool used in the cemented carbide sintering process, in particular to a graphite boat used in the cemented carbide sintering process. Background technique [0002] Cemented carbide is widely used in metal cutting tools, geological mining tools, mechanical wear-resistant parts and other fields due to its good comprehensive mechanical properties. It is mainly made by powder metallurgy. Sintering is one of the crucial processes, which will give the cemented carbide products a certain shape, size, microstructure and physical and mechanical properties. During the sintering process, the atmosphere is one of the main factors affecting the quality of sintered products. At present, there are mainly two forms of graphite boats used for cemented carbide sintering: one is a circular plate, which is composed of a circular bottom plate and side walls. There is no gap, so it is necessary to set a large-sized through hole in the center of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/00
Inventor 姚学祥李屏王社权
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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