A method for preparing superhard cemented carbide rods using wc-co composite powder as raw material by dry bag isostatic pressing and low pressure sintering

A composite powder and low-pressure sintering technology, which is applied in the field of preparation of superhard cemented carbide rods, can solve the problems of reducing the strength and density of the alloy, the impossibility of completely removing the forming agent, and affecting the quality of the cemented carbide. Internal stress, preventing incomplete removal, and reducing the effect of processing aging
CN108145158BActive Publication Date: 2019-10-25HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2019-10-25

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Abstract

The invention discloses a method of preparing a superhard alloy bar by using WC-Co composite powder as a raw material through dry bag isostatic pressing and low-pressure sintering. The method is characterized in that the nanometer WC-Co composite powder is used as a raw material, firstly the raw material is put in a dry bag isostatic pressing equipment mold cavity so as to suffer compression molding, and then low-pressure sintering furnace equipment is used for sintering so as to obtain the superhard alloy bar. The method has the beneficial effects that working procedures such as material mixing by wet milling, drying by alcohol volatilization, granulation by blending a forming agent and pressed blank drying in the process of preparing the superhard alloy bar by using low-Co fine-crystalline grain WC as raw materials are omitted, the technological process is short, the equipment operation is simple, and large-sized long bars can be produced.
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Description

technical field

[0001] The invention relates to a method for preparing superhard cemented carbide rods. The superhard cemented carbide rods prepared by the method are processed into non-standard drill bits or milling cutters, which are used for special tools in the automobile industry. Background technique

[0002] The automobile industry is the industry with the most application of special tools, and it is also a symbol to measure the technical level of a country or a tool company. Most of my country's automobile production lines (especially car production lines) are imported from abroad, and cutting tools are mainly imported together with the equipment. At present, domestic automobile production lines include American, European, Japanese and Korean models, as well as independent models mainly based on European equipment. There are five major knife factions active in China: one is Sandvik (including Seco), Sandvik has a large and complex branch of knives, and has the large...

Claims

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