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Ball milling electric field pressure-assisted sintering remanufacturing method and device of titanium chips

An electric field pressure-assisted and remanufacturing technology, which is applied in the field of metal material processing, can solve the problems of weakening the mechanical properties of materials and not solving them well, achieve good isotropy, realize oxide dispersion, and suppress the formation of metallurgical defects. Effect

Inactive Publication Date: 2017-05-24
SHANGHAI DIANJI UNIV
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Problems solved by technology

However, Ti is an active metal that is easy to oxidize. The oxide on the chip surface exists in the form of TiO2, and its texture is tough. If the Ti chip is directly processed by FAPAS technology, the oxide in the remanufactured Ti material cannot be broken and dispersed, and the oxide is continuous. distribution will form metallurgical defects in the microstructure, weakening the mechanical properties of the material
This technical problem has not yet been well resolved

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  • Ball milling electric field pressure-assisted sintering remanufacturing method and device of titanium chips
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Embodiment Construction

[0023] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with illustrations and specific embodiments.

[0024] Such as figure 1 As shown, the ball milling electric field pressure assisted sintering remanufacturing method of a kind of titanium chip that the present invention proposes comprises the following steps:

[0025] Step (1)-Ti chip recovery pretreatment: use the chips generated by end milling Ti 2 (ASTM Grade 2) as raw materials, collect the chips, and use Inductively coupled plasma atomic emission spectroscopy (ICP- AES) analysis of its chemical composition (mass percentage, wt.%), the analysis results are as follows: initial Ti cutting (mass percentage, wt.%) O=0.15, N<0.01, C<0.01, Fe=0.10; As can be seen from the analysis results , the chemical composition (oxygen content) of the grade 2 Ti chips processed by milling m...

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Abstract

The invention provides a ball milling electric field pressure-assisted sintering remanufacturing method and device of titanium chips. The ball milling electric field pressure-assisted sintering remanufacturing method comprises the steps of step (1), recycling and pretreatment of Ti chips; step (2) BM (ball milling) processing of Ti chips; and step (3) FAPAS (field-activated and pressure-assisted sintering) curing of BM-Ti chips. According to the ball milling electric field pressure-assisted sintering remanufacturing method, the BM technology and the FAPAS technology are combined, remanufacturing of waste chips is successfully implemented from second-grade Ti (ASTM Grade 2) chips, and a large-size blocky Ti material is prepared; through the BM-FAPAS remanufacturing technology, an ultrafine structure is prepared, oxide dispersion is achieved, and metallurgical defects are inhibited; the strength of the remanufactured Ti material is superior to that of a second-grade Ti commercial bar material on the similar oxygen content level, and the remanufactured Ti material has good isotropy; and the BM-FAPAS remanufacturing technology avoids high-temperature melting, is a low-cost, efficient and clean metal resource recycling treatment technology, and is particularly applicable to circulation and reutilization of high-smelting cost Ti resource.

Description

technical field [0001] The invention belongs to the field of metal material processing, and relates to solid-phase recycling and reuse of waste metal resources, especially for titanium resources with high smelting costs, and develops a new technology for remanufacturing highly efficient and clean titanium chips, especially relates to a waste Ball milling-electric field-pressure assisted sintering remanufacturing method of titanium chips. Background technique [0002] Field-activated and pressure-assisted sintering (FAPAS for short) is a new type of sintering technology developed in recent years. It utilizes the Joule heat generated by the pulsed electric field and applies pressure to achieve sintering and dense integration at instantaneous high temperature. FAPAS technology has the characteristics of uniform heating, fast heating speed, short sintering time and high production efficiency. The microscopic grains of its products are fine and uniform, which can effectively pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F8/00B22F3/14G01N21/73
CPCB22F3/14B22F8/00G01N21/73Y02W30/50
Inventor 罗蓬
Owner SHANGHAI DIANJI UNIV
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