Title: Technology of sectional type negative pressure anneal oil removing for aluminium material
Application Number: 95103194 Application Date: 1995.03.30
Publication Number: 1111681 Publication Date: 1995.11.15
Approval Pub. Date: Granted Pub. Date: 1998.05.27
International Classifi-cation: C22F1/04
Applicant(s) Name: Yunnan Aluminium Working Factory Address: 650216
Inventor(s) Name: Li Xiaodong, Jiao Suhua
Attorney & Agent: HE TONGPEI
Abstract:
     The invented technology firstly de-oils under the low temp. then conducts the regulation of mechanical property under high temp.. The concrete processes are as follows: (1) After the aluminium products are put in the annealing furnace, the high temp. blower fan is used to extract gas from the furnace 1-3 times under the temp. of 160-360 deg.C to make the gas pressure in furnace be negative relative to the atmospheric pressure. After each time of gas extraction, the furnace gas must be changed, that is stopping gas extraction, and letting the air enter the furnace to make the gas pressure balancde the atmospheric pressure. (2) After the last gas changing, the furnace temp. is raised to 380-480 deg.C for heat preservation annealing and conducting the mechanical regulation. (3) The finished product is obtained after cooling and discharging.
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