Vacuum protection atmosphere annealing process of industrial pure titanium roll

A technology of vacuum protection, industrial pure titanium, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of unsatisfactory surface quality, high heat treatment temperature and time, bonding of titanium coils, etc., to shorten the annealing cycle and surface quality. The effect of improving and reducing production costs
CN101654767AInactive Publication Date: 2010-02-24湖南湘投金天钛金属股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南湘投金天钛金属股份有限公司
Publication Date
2010-02-24
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention discloses a vacuum protection atmosphere annealing process of an industrial pure titanium roll, which comprises the following steps: charging a titanium roll with clean surface into a vacuum protection atmosphere annealing furnace; evacuating and heating to 430-500 DEG C and keeping the temperature for 1.5-2.5 hours; circulating in the furnace by a high-purity inert gas under the condition of micro-negative pressure; heating to 600-750 DEG C to insulate for 2-8 hours and then cooling to 400-550 DEG C; starting a forced cooling system to accelerate cooling; and discharging till the titanium roll is cooled to 170 DEG C. The mechanical performance, the chemical component and the surface quality of the annealed titanium roll can meet the requirements of a user; after the forced cooling system with a heat exchanger is adopted, the inert gas can be cooled by the heat exchanger, thereby greatly shortening the annealing period and reducing the annealing energy consumption and theproduction cost.
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Description

technical field

[0001] The invention belongs to the technical field of metal material processing, in particular to a vacuum protection atmosphere annealing process for industrial pure titanium coils. Background technique

[0002] Due to the active chemical properties of titanium, it is easy to react with O, N, H and other elements in the air at high temperature, forming a pollution layer on the surface, resulting in a decrease in its strength and plasticity, and an increase in hardness, which seriously affects subsequent processing and use. Therefore, at present, the annealing of finished titanium coils mostly uses a vacuum heating furnace or a full-hydrogen bell annealing furnace that transforms the original annealed steel coils for heat treatment in a protective atmosphere. However, annealing in a vacuum furnace is likely to cause inconsistencies in the microstructure of the inner and outer rings of the titanium coil, and the processing period becomes longer, which increas...

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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