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Mixture preparation process

A preparation process and a technology for mixing materials, applied in the field of powder metallurgy, can solve problems such as uneconomical, and achieve the effects of brittle logistics, uniform metallographic structure, and complete growth

Active Publication Date: 2019-11-12
ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the production of small batches, multiple brands, and constant changes in small and medium-sized enterprises, it is neither necessary nor economical to use spray drying.

Method used

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Experimental program
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specific Embodiment approach

[0074] Such as figure 1 Shown device, the specific embodiment of the present invention is as follows:

[0075] Step a, mixing 5 microns of tungsten carbide and cobalt powder into a mixture, wherein the weight of 5 microns of tungsten carbide accounts for 92% of the total mixture weight, and the weight of cobalt powder accounts for 8% of the total mixture weight. The weight of the material is 280Kg; the PEG forming agent and the WC raw material are mixed in such a way that the PEG forming agent accounts for 1.5% to 2.5% of the total weight of the mixture to form a mixture. After mixing, add it to a ball mill for wet grinding for 15 to 20 hours. Alcohol is added to improve the wet grinding efficiency and the fineness of the mixture after wet grinding is uniform; specifically, the PEG molding agent can be set to account for 1.5% or 2.5% or 2% of the weight of the mixture according to actual needs, and the wet grinding The time is set according to the state of the mixture after g...

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Abstract

The invention discloses a mixture preparation process. Rapid and continuous stirring is carried out in the state that the vacuum degree of a vacuum drying stirrer ranges from -0.06- -0.08 so that the drying speed can be increased and oxidation and / or excessive hardness of a mixture can be prevented; when stirring enables the temperature in the vacuum drying stirrer has an obvious rising process and the mixture is in a half-dry state, continuous stirring is stopped, the vacuum degree of the vacuum drying stirrer is reduced to 0- -0.05, the mixture is prevented from being broken, so that follow-up pelletizing is facilitated; and the mixture particles produced and discharged in such a way are soft, fragile and good in pressing performance, holes of sintered products can reach A02 or below, WC grows completely, and metallographic structures are uniform.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a process for preparing a mixture for powder metallurgy. Background technique [0002] Powder metallurgy is a process technology for producing metal or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. Powder metallurgy has similarities with the production of ceramics. Therefore, a series of new powder metallurgy technologies can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solve the problems of new materials and plays a pivotal role in the development of new materials. At present, powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04
CPCB22F1/0003B22F9/04
Inventor 杨慧肖旭凯高江雄文建皇李丽
Owner ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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