Novel aluminum nitride dispersion strengthening powder metallurgical aluminum high-speed steel and preparation method thereof

A technology of powder metallurgy and dispersion strengthening, which is applied in the field of near-net shape technology, can solve problems such as refractory melting, atomization, and deterioration of material toughness, achieve fine structure, improve wear resistance and oxidation resistance, and facilitate development and trial use Effect
CN108642402AActive Publication Date: 2018-10-12XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIANGTAN UNIV
Publication Date
2018-10-12

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Abstract

The invention discloses novel aluminum nitride dispersion strengthening powder metallurgical aluminum high-speed steel and a preparation method thereof. Aluminum high-speed steel prepared by the preparation method adopts a novel powder metallurgical high-speed steel direct preparation process to lead in (0.05-5.0) AlN micro powder, and a material mixture is subjected to processes such as wet-milling, pelletizing, isostatic cool pressing and forming, hydrogen gas deoxidizing, hot-pressing composite sintering and vacuum thermal treatment, so that micro-level dispersion distribution of aluminum nitride particles is realized, and therefore, the defects that a conventional casting process easily generates a ledeburite structure, an aluminum nitride strengthening phase is difficulty led in by agas-atomizing-hot isostatic pressing method, and the like are overcome. The novel aluminum nitride dispersion strengthening powder metallurgical aluminum high-speed steel is short in process flow, islow in production cost, is low in impurity content, is high in compactness, and is remarkably improved in wear resistance, oxidization resistance and a micro structure after aluminum nitride is led in, and is novel mould material among conventional high-speed steel, a hard alloy and a ceramic material.
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Description

technical field

[0001] The invention relates to a new type of powder metallurgy high-speed steel, that is, aluminum nitride dispersion-strengthened oxidation-resistant powder metallurgy aluminum high-speed steel, as well as its preparation method and near-net forming process. technical background

[0002] High-speed steel can be divided into high-end powder metallurgy high-speed steel and ordinary cast and forged high-speed steel. The former has anisotropy and Excellent comprehensive mechanical properties. However, my country does not have the production capacity of high-end powder metallurgy high-speed steel so far. This is mainly due to its long production process, large equipment investment, and high technical threshold, involving core equipment and technologies such as electroslag remelting, gas atomization, and hot isostatic pressing. Today, powder metallurgy high-speed steel has gone through three generations, and the optimization of impurity content and alloying sch...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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