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A kind of vacuum annealing method for cold rolling titanium plate
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A vacuum annealing furnace and annealing technology, applied in furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of long process, unstable rolling state, high cost, etc., and achieve the effect of high processing efficiency, good surface quality and short process
Active Publication Date: 2021-03-26
LUOYANG SUNRUI TI PRECISION CASTING
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However, since the head and tail part of the titanium coil is the starting and stopping section in the rolling process, the rolling state is unstable, and the plate shape is obviously worse than the middle area of the titanium coil. The plate obtained at the end part will have some poor shape; and in the initial stage of the titanium coil unrolling and cross-shearing process, it is necessary to partially adjust the parameters of the straightening machine, that is, it is necessary to use some titanium coils for trial cutting, and during the trial cutting process The plates obtained are usually of poor shape, so in the production process of cold-rolled titanium plates, some plates with poor shape are generally produced.
At present, atmospheric pressure orthopedic annealing is usually used for plates with poor shape, and then sandblasting or alkaline pickling is performed to correct the shape of the plate. However, the existing method not only has a long process and high cost, but also has low efficiency. , and due to the use of pickling, the surface state of the titanium plate will change, which is difficult to meet the actual production requirements
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example 1
[0040] TA1 cold-rolled titanium coil is used, and after opening and horizontal shearing, the titanium plate specification is 1.0*1230*2000mm, and the quantity is 40 sheets. The front roughness is 8~12mm, and the back side roughness is 2~5mm; 2 sheets of annealing protection plates are prepared, with a specification of 1.0*1230 *2000mm, the unevenness of the front and back is 1~3mm;
[0041] After the board is degreased, place it according to the frontal unevenness of 8~12mm; place the protection board at the bottom and top respectively;
[0042]Furnace installation; the backing plate is made of 20*1300*3000mm specification 304 stainless steel plate, and the unevenness is 1mm / m;
[0044] a: The first stage: evacuated to a degree of vacuum ≤ 0.02Pa, then heated to 150°C for 40min, and kept for 1h;
[0045] b: The second stage: from 150°C to 400°C over 90min; keep warm for 2h;
[0046] c: The third stage: from 400°C to 530°C in 90min; keep warm for 5...
example 2
[0052] TA1 cold-rolled titanium coil is used, and after opening and horizontal shearing, the titanium plate has a specification of 2.0*1000*2000mm, and the quantity is 50 sheets. The front roughness is 15~30mm, and the back roughness is 5~10mm; 2 sheets of annealing protection plates are prepared, with a specification of 2.0*1000 *2000mm, the unevenness of the front and back is 1~3mm;
[0053] After the board is degreased, place it according to the frontal unevenness of 15~30mm; place the protection board at the bottom and top respectively;
[0054] Furnace installation; the backing plate is made of 20*1300*3000mm specification 304 stainless steel plate, and the unevenness is 1mm / m;
[0056] a: The first stage: evacuated to a degree of vacuum ≤ 0.02Pa, then heated to 150°C for 40min, and kept for 1h;
[0057] b: The second stage: from 150°C to 400°C over 120min; keep warm for 2h;
[0058] c: the third stage: from 400°C to 550°C over 120min; keep w...
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Abstract
The invention provides a vacuum annealing method for a cold-rolled titanium plate. A to-be-annealed plate with the unevenness of 8-30 mm and two protection plates are prepared; the to-be-annealed plate is placed in a vacuum annealing furnace after degreasing and plate type inspection, wherein one protection plate and a base plate are placed to bottom of the to-be-annealed plate, and the other protection plate and a press plate are placed to the top of the to-be-annealed plate; then the to-be-annealed plate is subjected to vacuum annealing, wherein the poor-flatness surface of the surfaces on the two sides of the to-be-annealed plate face upwards, the heating and cooling processes are controlled, and the to-be-annealed plate with the unevenness of no more than 5 mm is obtained. The processis very short, the cost is relatively low, the processing efficiency of the plate is relatively high, it is ensured that the surface state of the plate is not changed, the surface quality of the cold-rolled titanium plate is good, and the actual production requirements of the cold-rolled titanium plate can be met.
Description
technical field [0001] The invention relates to the field of annealing of cold-rolled titanium plates, in particular to a vacuum annealing method for cold-rolled titanium plates. Background technique [0002] With the development of the titanium industry market, the requirements for the shape of cold-rolled titanium plates are getting higher and higher. At present, cold-rolled titanium plates with a thickness of 1~3mm are usually obtained by slitting and horizontally shearing titanium coils. However, since the head and tail part of the titanium coil is the starting and parking section during the rolling process, the rolling state is unstable, and the plate shape is significantly worse than that in the middle area of the titanium coil, so after the horizontal shearing, the head of the titanium coil is led by the titanium coil. The plate obtained from the tail part will have some bad shape; and in the initial stage of the titanium coil open-level and cross-shearing process,...
Claims
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