CN102517529B - Vacuum heat treatment process of cold rolled titanium strip coil for plate heat exchanger - Google Patents
Vacuum heat treatment process of cold rolled titanium strip coil for plate heat exchanger Download PDFInfo
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- CN102517529B CN102517529B CN 201110382527 CN201110382527A CN102517529B CN 102517529 B CN102517529 B CN 102517529B CN 201110382527 CN201110382527 CN 201110382527 CN 201110382527 A CN201110382527 A CN 201110382527A CN 102517529 B CN102517529 B CN 102517529B
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Abstract
The invention relates to a vacuum heat treatment process of a cold rolled titanium strip coil for plate heat exchanger. The process comprises the following steps of: vacuumizing the cold rolled titanium strip coil for plate heat exchanger in a vacuum furnace to (1-8)*10-2Pa; raising the temperature to 300 to 450 DEG C at the speed of 5 to 15 DEG C/min and keeping the temperature for 1 to 6 hours; raising the temperature to 500 to 600 DEG C at the speed of 2 to 10 DEG C/min and keeping the temperature for 2 to 8 hours; raising the temperature to 650 to 760 DEG C at the speed of 0.5 to 5 DEG C/min, and keeping the temperature for 8 to 18 hours; and after temperature maintenance, cooling the cold rolled titanium strip coil to 400 to 550 DEG C at the speed of 0.5 to 5 DEG C/min, filling argon into the vacuum furnace to cool the cold rolled titanium strip coil to 100 DEG C, and taking out the cold rolled titanium strip coil from the furnace. The uniformity of the performances of the cold rolled titanium strip coil for plate heat exchanger processed by the heat treatment process is high, the yield strength difference of each part is not more than 15Mpa, the yield strength ratio is not more than 0.72, the cup drawing value is not less than 11.5mm, and the pass percent of punching at one time can be up to over 99.5 percent.
Description
Technical field
The present invention relates to a kind of metal material processing technology, particularly a kind of plate is used the vacuum heat treatment process of cold rolling titanium strip coil instead.
Background technology
The titanium plate-type heat exchanger is widely used in chemical industry, oil, metallurgical, electric power, industrial sectors such as boats and ships, application quantity is big, the heat treating method commonly used of cold rolling pure titanium roll is used in vacuum annealing instead as plate, the transfer mode of its heat is mainly undertaken by thermal radiation, heat transfer efficiency is lower, the performance uniformity of titanium strip coil different sites is difficult to guarantee, with reference to GJB3763A-2004, adopt conventional vacuum heat treatment process to handle cold rolling titanium strip coil, the yield strength difference of its different sites is more than 80MPa, and titanium strip coil middle part Erichsen number is lower, can not satisfy the service requirements of plate-type heat exchanger with plate.
State's outside plate is used cold rolling titanium strip coil instead and is adopted continuous annealing or vacuum protection atmosphere annealing (also crying vacuum argon filling annealing); its surperficial ubiquity necessarily pollutes; if carry out the vacuum annealing that plate is used cold rolling titanium strip coil instead according to vacuum protection annealed common process; mainly undertaken owing to it is heat passage by radiation; efficient is lower; the temperature difference of titanium band different sites is very big; cause the performance uniformity of annealing back titanium strip coil different sites poor; the Erichsen number at middle part is lower, can not satisfy the service requirements of plate-type heat exchanger with plate.
Summary of the invention
Technical problem to be solved by this invention provides the vacuum heat treatment process that a kind of plate is used cold rolling titanium strip coil instead, improve plate and use annealing performance uniformity and a punching press qualification rate of cold rolling titanium strip coil instead, it is good to make plate use cold rolling titanium strip coil performance uniformity instead, each position yield strength difference is not more than 15MPa, yield tensile ratio is not higher than 0.72, Erichsen number is not less than 11.5mm, and one time the punching press qualification rate can reach more than 99.5%.
For the purpose that realizes solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of plate of the present invention is used the vacuum heat treatment process of cold rolling titanium strip coil instead, it is characterized in that: will use cold rolling titanium strip coil instead and insert in the vacuum oven and be evacuated to (1～8) * 10 through the deoil plate handled of degreasing
-2Pa, be warming up to 300～450 ℃ and be incubated 1～6 hour with the speed of 5～15 ℃/min, be warming up to 500～600 ℃ and be incubated 2～8 hours with the speed of 2～10 ℃/min again, be warming up to 650～760 ℃ and be incubated 8～18 hours with the speed of 0.5～5 ℃/min again, insulation finish the back be cooled to 400～550 ℃ with the speed of 0.5～5 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.
Described plate is used the vacuum heat treatment process of cold rolling titanium strip coil instead, and its optimized technical scheme is: will use cold rolling titanium strip coil instead and insert in the vacuum oven and be evacuated to (2.2～7.2) * 10 through the deoil plate handled of degreasing
-2Pa, be warming up to 400～420 ℃ and be incubated 2～4 hours with the speed of 5.8～12 ℃/min, be warming up to 520～550 ℃ and be incubated 4～6 hours with the speed of 2～5 ℃/min again, be warming up to 6700～720 ℃ and be incubated 10～12 hours with the speed of 0.8～1.2 ℃/min again, insulation finish the back be cooled to 480～520 ℃ with the speed of 2～5 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.
By adopting technique scheme, the present invention has following beneficial effect:
It is good that the plate that adopts this thermal treatment process to handle is used cold rolling titanium strip coil performance uniformity instead, and each position yield strength difference is not more than 15MPa, and yield tensile ratio is not higher than 0.72, and Erichsen number is not less than 11.5mm, and one time the punching press qualification rate can reach more than 99.5%.
Embodiment
Embodiment 1
The specification that to deoil through degreasing is that 5.2 tons of plates of 0.6*1250mm are used cold rolling titanium strip coil instead and sent into and be evacuated to 2.2 * 10 in the vacuum oven
-2Pa, be warming up to 420 ℃ and be incubated 4 hours with the speed of 12 ℃/min, be warming up to 550 ℃ and be incubated 5 hours with the speed of 5 ℃/min again, be warming up to 720 ℃ of insulations 12 hours with the speed of 0.8 ℃/min again, insulation finish the back be cooled to 520 ℃ with the speed of 5 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.According to GB/T 14845-2007 sampling and testing, the result shows that each position yield strength difference of titanium band is not more than 10MPa, and yield tensile ratio is 0.68 to the maximum, and the Erichsen number minimum is 11.5mm, a punching press qualification rate 100%.
Embodiment 2
The specification that to deoil through degreasing is that 4.2 tons of plates of 0.53*1250mm are used cold rolling titanium strip coil instead and sent into and be evacuated to 3.9 * 10 in the vacuum oven
-2Pa, be warming up to 420 ℃ and be incubated 4 hours with the speed of 7.5 ℃/min, be warming up to 550 ℃ and be incubated 6 hours with the speed of 3 ℃/min again, be warming up to 710 ℃ of insulations 10.5 hours with the speed of 1.0 ℃/min again, insulation finish the back be cooled to 500 ℃ with the speed of 4 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.According to GB/T 14845-2007 sampling and testing, the result shows that each position yield strength difference of titanium band is not more than 15MPa, and yield tensile ratio is 0.71 to the maximum, and the Erichsen number minimum is 11.5mm, a punching press qualification rate 100%.
Embodiment 3
The specification that to deoil through degreasing is that 3.9 tons of plates of 0.48*1250mm are used cold rolling titanium strip coil instead and sent into and be evacuated to 7.2 * 10 in the vacuum oven
-2Pa, be warming up to 400 ℃ and be incubated 4 hours with the speed of 5.8 ℃/min, be warming up to 520 ℃ and be incubated 6 hours with the speed of 2 ℃/min again, be warming up to 700 ℃ of insulations 10.5 hours with the speed of 1.2 ℃/min again, insulation finish the back be cooled to 480 ℃ with the speed of 3 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.According to GB/T 14845-2007 sampling and testing, the result shows that each position yield strength difference of titanium band is not more than 15MPa, and yield tensile ratio is 0.72 to the maximum, and the Erichsen number minimum is 11.5mm, a punching press qualification rate 100%.
Comparative Examples 1
The specification that to deoil through degreasing is that 3.5 tons of plates of 0.59*1250mm are used cold rolling titanium strip coil instead and sent into and be evacuated to 1.8 * 10 in the vacuum oven
-2Pa is warming up to 400 ℃ and be incubated 4 hours with the speed of 5 ℃/min, and the speed with 2.5 ℃/min is warming up to 690 ℃ of insulations 11.5 hours again, and insulation finishes behind the postcooling to 480 ℃ argon filling and is cooled to 100 ℃ and comes out of the stove.
According to GB/T 14845-2007 sampling and testing, each position yield strength difference 110MPa of titanium band, yield tensile ratio is 0.85 to the maximum, and the Erichsen number minimum is 8.7mm, and one time the punching press qualification rate is 27%.And GB/T 14845-2007 requires Erichsen number to be not less than 9.5mm.
Comparative Examples 2
The specification that to deoil through degreasing is that 3.1 tons of plates of 0.59*1250mm are used cold rolling titanium strip coil instead and sent into and be evacuated to 1.8 * 10 in the vacuum oven
-2Pa is warming up to 400 ℃ and be incubated 4 hours with the speed of 10 ℃/min, and the speed with 9.3 ℃/min is warming up to 690 ℃ of insulations 10.8 hours again, and insulation finishes behind the postcooling to 480 ℃ argon filling and is cooled to 100 ℃ and comes out of the stove.
According to GB/T 14845-2007 sampling and testing, each position yield strength difference 340MPa of titanium band, yield tensile ratio is 0.91 to the maximum, and the Erichsen number minimum is 6.6mm, and one time the punching press qualification rate only is 12%.
Claims (2)
1. a plate is used the vacuum heat treatment process of cold rolling titanium strip coil instead, it is characterized in that: will use cold rolling titanium strip coil instead and insert in the vacuum oven and be evacuated to (1～8) * 10 through the deoil plate handled of degreasing
-2Pa, be warming up to 300～450 ℃ and be incubated 1～6 hour with the speed of 5～15 ℃/min, be warming up to 500～600 ℃ and be incubated 2～8 hours with the speed of 2～10 ℃/min again, be warming up to 650～760 ℃ and be incubated 8～18 hours with the speed of 0.5～5 ℃/min again, insulation finish the back be cooled to 400～550 ℃ with the speed of 0.5～5 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.
2. use the vacuum heat treatment process of cold rolling titanium strip coil according to the described plate of claim 1 instead, it is characterized in that: will use cold rolling titanium strip coil instead and insert in the vacuum oven and be evacuated to (2.2～7.2) * 10 through the deoil plate handled of degreasing
-2Pa, be warming up to 400～420 ℃ and be incubated 2～4 hours with the speed of 5.8～12 ℃/min, be warming up to 520～550 ℃ and be incubated 4～6 hours with the speed of 2～5 ℃/min again, be warming up to 670 ℃～720 ℃ and be incubated 10～12 hours with the speed of 0.8～1.2 ℃/min again, insulation finish the back be cooled to 480～520 ℃ with the speed of 2～5 ℃/min after argon filling be cooled to 100 ℃ and come out of the stove.
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| CN 201110382527 CN102517529B (en) | 2011-11-28 | 2011-11-28 | Vacuum heat treatment process of cold rolled titanium strip coil for plate heat exchanger |
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| CN 201110382527 CN102517529B (en) | 2011-11-28 | 2011-11-28 | Vacuum heat treatment process of cold rolled titanium strip coil for plate heat exchanger |
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| CN102517529A CN102517529A (en) | 2012-06-27 |
| CN102517529B true CN102517529B (en) | 2013-07-31 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537637B (en) * | 2013-09-12 | 2016-08-17 | 云南钛业股份有限公司 | A kind of method that titanium ingot casting is effectively cooled down |
| CN104032246A (en) * | 2014-05-30 | 2014-09-10 | 云南钛业股份有限公司 | Annealing process of titanium strip coils for welding pipes |
| CN104152829B (en) * | 2014-08-26 | 2016-06-01 | 攀钢集团攀枝花钢铁研究院有限公司 | The vacuum annealing method of cold rolling industry pure titanium coil |
| CN104152828B (en) * | 2014-08-26 | 2016-06-01 | 攀钢集团攀枝花钢铁研究院有限公司 | The vacuum annealing process of a kind of cold rolling industry pure titanium coil |
| CN109023187B (en) * | 2018-08-17 | 2020-12-15 | 成都先进金属材料产业技术研究院有限公司 | Vacuum annealing process for eliminating annealing adhesion of cold-rolled titanium coil |
| CN109252121B (en) * | 2018-10-30 | 2021-07-20 | 希诺股份有限公司 | Processing method of needle-shaped crystal patterns on surface of thin-wall pure titanium product |
| CN110438324B (en) * | 2019-08-23 | 2021-03-26 | 洛阳双瑞精铸钛业有限公司 | Vacuum annealing method for cold-rolled titanium plate |
| CN110819923A (en) * | 2019-11-22 | 2020-02-21 | 西安庄信新材料科技有限公司 | Heat treatment process of titanium plate blank |
| CN110923598A (en) * | 2019-12-05 | 2020-03-27 | 中国航发北京航空材料研究院 | Heat treatment process for improving toughness of nearly β type or metastable β type titanium alloy |
| CN111394669A (en) * | 2020-04-26 | 2020-07-10 | 北京科技大学 | Manufacturing method for reducing anisotropy of pure titanium thin plate strip for deep drawing |
| CN112095060A (en) * | 2020-08-27 | 2020-12-18 | 沈阳中钛装备制造有限公司 | Annealing method of titanium product |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654767A (en) * | 2009-09-28 | 2010-02-24 | 湖南湘投金天钛金属有限公司 | Vacuum protection atmosphere annealing process of industrial pure titanium roll |
| CN102002658A (en) * | 2010-11-24 | 2011-04-06 | 莱芜钢铁股份有限公司 | Annealing process of cold rolled titanium roll |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654767A (en) * | 2009-09-28 | 2010-02-24 | 湖南湘投金天钛金属有限公司 | Vacuum protection atmosphere annealing process of industrial pure titanium roll |
| CN102002658A (en) * | 2010-11-24 | 2011-04-06 | 莱芜钢铁股份有限公司 | Annealing process of cold rolled titanium roll |
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