CN104772468A - Heating oxidation oxygenation method of titanium sponge for TA2-grade welded pipe - Google Patents
Heating oxidation oxygenation method of titanium sponge for TA2-grade welded pipe Download PDFInfo
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- CN104772468A CN104772468A CN201510138689.9A CN201510138689A CN104772468A CN 104772468 A CN104772468 A CN 104772468A CN 201510138689 A CN201510138689 A CN 201510138689A CN 104772468 A CN104772468 A CN 104772468A
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Abstract
The invention relates to a heating oxidation oxygenation method of titanium sponge for a TA2-grade welded pipe. The oxygenation is realized by oxidizing titanium sponge particles under a given temperature, so that the oxygen content of a molten cast ingot is uniform, the segregation problem of the oxygen content can be thoroughly solved, the rate of finished products of the titanium welded pipe can be greatly increased, the production cost is reduced, the technology of the titanium welded pipe industry department can be improved, and the welded pipe produced according to the process can satisfy the application requirement of various fields. Meanwhile, different oxygenation amount can be realized by adjusting the process parameters so as to satisfy the requirement of the titanium welded pipe in different fields; in addition, the secondary ingot smelting is not needed for the oxidized sponge titanium in the VAR-method smelting process, the requirement can be met by virtue of primary ingot, and the oxygen content segregation problem can be avoided.
Description
[technical field]
The present invention relates to a kind of oxygenation method, be specifically related to a kind of welded tube TA2 level titanium sponge heated oxide oxygenation method.
[background technology]
Known, titanium welding pipe have light specific gravity, corrosion-resistant, high temperature resistant, low temperature resistant, without features such as magnetic are nontoxic, and there is excellent machining property and heat exchange property, also have certain Memorability and superconductivity simultaneously, be widely used in the industries such as navigation, space flight, electric power, metallurgy, mine, petrochemical industry, chlor-alkali, desalinization.
Titanium welding pipe needs certain intensity and hardness, controls other impurity content to ensure the mechanical property of titanium welding pipe at present mainly through increasing oxygen content simultaneously.Existing technique is mainly by adding TiO
2realize oxygenation, according to the melting of EB stove, then due to TiO under the inhomogeneities of batch mixing or vacuum state
2loss etc. easily cause the slab oxygen content of melting uneven; If adopt VAR melting, then add TiO
2after powder batch mixing, in the process of extruding electrode, the titanium valve waste of each electrode differs, and TiO
2powder fusing point comparatively titanium exceeds about 200 DEG C, easily produces segregation (oxygen content segregation is one of key factor of the domestic titanium welding pipe development of restriction), even if the melting of secondary ingot is also difficult to ensure its uniformity etc.
[summary of the invention]
In order to overcome the deficiency existed in background technology, the invention provides a kind of welded tube TA2 level titanium sponge heated oxide oxygenation method, titanium sponge after oxidation processes of the present invention, the slab oxygen content of institute's melting is even, cold-rolled process tabularium thickness fluctuation is little, every mechanical property all meets the demands, and can meet the instructions for use in each field.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
A kind of welded tube TA2 level titanium sponge heated oxide oxygenation method, specifically comprises the steps:
One, get the raw materials ready:
First select granularity to be the titanium sponge of 0.83 ~ 25.4mm, control barreled titanium sponge lump, flaw-piece titanium, rising head Ti content;
Two, preparation machine:
Connect step, according to expection oxygenation amount, the oxidizing temperature of setting mesh band type resistor furnace and temperature retention time, set the stone height of mesh bag transmission frequency and automatic laying device simultaneously;
Three, blanking oxidation:
Connect step, after the furnace temperature of mesh band type resistor furnace rises to design temperature, open the convection flow fan on mesh band type resistor furnace, vibrating feeder (conveyer) and automatic laying device, start blanking oxidation, impel oxygen and titanium sponge in air to react with the effect realizing oxygenation by heating;
Four, argon-filled protection:
Connect step, argon-filled protection, in case titanium sponge burns in mesh band type resistor furnace oxidizing process, once burn, close fire door, and carry out argon filling fire extinguishing, lower equipment loss risk;
Five, barrelling:
Connect step, after oxidation terminates, titanium sponge is cooled to 0 ~ 200 DEG C of barrelling with conveyer belt;
Six, check:
Connect step, oxidation-treated titanium sponge batching adopts EB stove to carry out melting ingot casting and follow-up rolling, confirms titanium sponge heated oxide oxygenation effect.
Described welded tube TA2 level titanium sponge heated oxide oxygenation method, in described second step, oxidizing temperature scope is 450 ~ 650 DEG C.
Described welded tube TA2 level titanium sponge heated oxide oxygenation method, in described second step, temperature retention time is 25 ~ 60min.
Described welded tube TA2 level titanium sponge heated oxide oxygenation method, in described second step, mesh bag transmission frequency is 10 ~ 40HZ.
Described welded tube TA2 level titanium sponge heated oxide oxygenation method, in described second step, stone height is 20 ~ 60mm.
Described welded tube TA2 level titanium sponge heated oxide oxygenation method, the convection flow fan in described 3rd step can ensure the uniformity of temperature in burner hearth, the air recoverable amount in increase burner hearth that simultaneously can be suitable, to reach the effect of strengthening oxygenation.
Adopt technical scheme as above, the present invention has following beneficial effect:
A kind of welded tube TA2 level titanium sponge heated oxide oxygenation method of the present invention, oxygenation is realized by oxidation processes titanium sponge particles at a certain temperature, make the ingot casting oxygen content of melting even, the problem of thorough solution oxygen content segregation, significantly can promote the yield rate of titanium welding pipe, and reduce its production cost, promote the technical merit of titanium welding pipe Estate Division, the welded tube of this explained hereafter can meet the instructions for use in each field.Meanwhile, by adjusting process parameter, different oxygenation amounts can be realized, with the demand of satisfied different occasion titanium welding pipe, additionally by the titanium sponge of oxidation processes, in VAR method fusion-casting process, without the need to the melting of secondary ingot, one time ingot can meet the demands, and there is not oxygen content segregation problems etc.
[detailed description of the invention]
Can explain the present invention in more detail by the following examples, the present invention is not limited to the following examples;
A kind of welded tube TA2 level titanium sponge heated oxide oxygenation method of the present invention, specifically comprises the steps:
One, get the raw materials ready:
First select granularity to be the titanium sponge of 0.83 ~ 25.4mm, control barreled titanium sponge lump, flaw-piece titanium, rising head Ti content;
Two, preparation machine:
Connect step, according to expection oxygenation amount, the oxidizing temperature of setting mesh band type resistor furnace and temperature retention time, set the stone height of mesh bag transmission frequency and automatic laying device simultaneously, wherein oxidizing temperature scope is 450 ~ 650 DEG C, temperature retention time is 25 ~ 60min, and mesh bag transmission frequency is 10 ~ 40HZ, and automatic laying device stone height is 20 ~ 60mm;
Three, blanking oxidation:
Connect step, after the furnace temperature of mesh band type resistor furnace rises to design temperature, open the convection flow fan on mesh band type resistor furnace, vibrating feeder (conveyer) and automatic laying device, start blanking oxidation, oxygen and titanium sponge in air is impelled to react with the effect realizing oxygenation by heating, wherein convection flow fan can ensure the uniformity of temperature in burner hearth, the air recoverable amount in increase burner hearth that simultaneously can be suitable, to reach the effect of strengthening oxygenation;
Four, argon-filled protection:
Connect step, argon-filled protection, in case titanium sponge burns in mesh band type resistor furnace oxidizing process, once burn, close fire door, and carry out argon filling fire extinguishing, lower equipment loss risk;
Five, barrelling:
Connect step, after oxidation terminates, titanium sponge is cooled to 0 ~ 200 DEG C of barrelling with conveyer belt;
Six, check:
Connect step, oxidation-treated titanium sponge batching adopts EB stove to carry out melting ingot casting and follow-up rolling, confirms titanium sponge heated oxide oxygenation effect.
Specific embodiments of the invention are as follows:
Embodiment 1:OA level titanium sponge heated oxide oxygenation method:
The first step: raw material prepare: 2 tons of OA level titanium sponges, chemical composition and hardness as shown in the table;
| Titanium sponge lot number | Grade | Fe | Cl | C | O | N | H | Mg | Hardness | Granularity |
| 1401-59 | OA | 0.02 | 0.023 | 0.01 | 0.036 | 0.003 | ＜0.003 | 0.004 | 91 | 0.83-25.4 |
Second step: preparation machine: furnace temperature is set as 550 DEG C, mesh bag transmission frequency is adjusted to 14HZ, temperature retention time 38min, the stone height of automatic laying device is set as 35mm;
3rd step: blanking is oxidized: treat that furnace temperature rises to 550 DEG C, opens convection flow fan, automatically laying device, vibrating feeder (conveyer), starts to be oxidized above-mentioned material;
4th step: mesh bag end, oxidation titanium sponge temperature is down to 200 DEG C, and barrelling is preserved;
5th step: 2 tons of titanium sponges of institute's heated oxide oxygenation, adopts EB stove to carry out melting ingot casting, EB stove working chamber vacuum 0.03 ~ 0.06 × 10
-2pa, carries out sampling and testing to the every 100mm of slab subsequently, and its slab chemical composition is as follows:
| Specimen coding | Fe | C | O | N |
| S1-400 | 0.02 | 0.01 | 0.088 | 0.012 |
| S1-500 | 0.02 | 0.01 | 0.097 | 0.011 |
| S1-700 | 0.02 | 0.01 | 0.08 | 0.0078 |
| S1-800 | 0.02 | 0.01 | 0.097 | 0.0091 |
| S1-900 | 0.02 | 0.01 | 0.093 | 0.0088 |
| S1-1000 | 0.02 | 0.01 | 0.086 | 0.0082 |
| S1-1100 | 0.02 | 0.01 | 0.081 | 0.0069 |
| S1-1130 | 0.019 | 0.01 | 0.093 | 0.0092 |
| S1-1200 | 0.02 | 0.01 | 0.099 | 0.0082 |
| S1-1300 | 0.02 | 0.01 | 0.081 | 0.0066 |
6th step: effect analysis, OA level titanium sponge particles is after meshbeltfurnace heated oxide oxygenation process, and the O content of melting slab fluctuates in 0.081% ~ 0.099% scope, and N content fluctuates in 0.0066% ~ 0.012% scope, O, N content are even, meet the requirement of TA2 welded tube.
Embodiment 2:0 level titanium sponge heated oxide oxygenation method:
The first step: raw material prepare: 6.75 tons of O level titanium sponges, chemical composition and hardness as shown in the table:
| Titanium sponge lot number | Grade | Fe | Cl | C | O | N | H | Mg | Hardness | Granularity |
| 1403-477 | O | 0.02 | 0.026 | 0.01 | 0.039 | 0.006 | ＜0.003 | 0.004 | 95 | 0.83-25.4 |
Second step: preparation machine: furnace temperature is set as 550 DEG C, mesh bag transmission frequency is adjusted to 18HZ(temperature retention time 29.5min), automatic laying device height setting 35mm;
3rd step: treat that furnace temperature rises to 550 DEG C, opens convection flow fan, automatically laying device, vibrating feeder (conveyer), starts to be oxidized above-mentioned material;
4th step: mesh bag end, oxidation titanium sponge temperature is down to 200 DEG C, and barrelling is preserved;
5th step: 6.75 tons of titanium sponges of institute's heated oxide oxygenation, adopts EB stove to carry out melting ingot casting, EB stove working chamber vacuum 0.03 ~ 0.06 × 10
-2pa, carries out sampling and testing to the every 1000mm of slab subsequently, and its slab chemical composition is as follows:
| Specimen coding | Fe | C | O | N |
| S2-329 | 0.02 | 0.01 | 0.087 | 0.01 |
| S2-1304 | 0.021 | 0.01 | 0.087 | 0.0096 |
| S2-2300 | 0.02 | 0.01 | 0.083 | 0.0098 |
| S2-3330 | 0.02 | 0.01 | 0.077 | 0.0093 |
| S2-4308 | 0.02 | 0.01 | 0.085 | 0.0099 |
| S2-5301 | 0.02 | 0.011 | 0.075 | 0.0098 |
6th step: effect analysis, 0 grade of titanium sponge particles is after meshbeltfurnace heated oxide oxygenation process, and the O content of melting slab fluctuates in 0.075% ~ 0.087% scope, and N content fluctuates in 0.0093% ~ 0.01% scope, O, N content are even, meet the requirement of TA2 welded tube.
7th step: rolling is verified, cold rolling finished product thickness fluctuation 1.05 ± 0.02mm, its mechanical property is as shown in the table, meets welded tube TA2 and is with requirement.
Embodiment 3: super 0A level titanium sponge heated oxide oxygenation technique
The first step: raw material prepare, 6.75 tons of super 0A level titanium sponges, chemical composition and hardness as shown in the table:
| Titanium sponge lot number | Grade | Fe | Cl | C | O | N | H | Mg | Hardness | Granularity |
| 1404-624 | OA | 0.03 | 0.055 | 0.01 | 0.036 | 0.004 | ＜0.003 | 0.003 | 90 | 0.83-25.4mm |
| 1404-617 | OA | 0.01 | 0.024 | 0.01 | 0.035 | 0.01 | ＜0.003 | 0.004 | 93 | 0.83-25.4mm |
Second step: equipment prepares, is set as 575 DEG C, mesh bag transmission frequency is adjusted to 16HZ(temperature retention time 33min by furnace temperature), automatic laying device height setting 30mm.
3rd step: treat that furnace temperature rises to 575 DEG C, opens convection flow fan, automatically laying device, vibrating feeder (conveyer), starts to be oxidized above-mentioned material.
4th step: mesh bag end, oxidation titanium sponge temperature is down to 200 DEG C, and barrelling is preserved.
5th step: 6.75 tons of titanium sponges of institute's heated oxide oxygenation, adopts EB stove to carry out melting ingot casting, EB stove working chamber vacuum 0.03 ~ 0.06 × 10
-2pa, carries out sampling and testing to the every 1000mm of slab subsequently, and its slab chemical composition is as follows:
6th step: effect analysis, super OA level titanium sponge is after meshbeltfurnace heated oxide oxygenation process, and the O content of melting slab fluctuates in 0.094% ~ 0.105% scope, and N content fluctuates in 0.011% ~ 0.015% scope, O, N content are even, meet the instructions for use of TA2 welded tube.
7th step: rolling is verified, cold rolling finished product thickness fluctuation 0.50 ± 0.02mm, its mechanical property is as shown in the table, meets welded tube TA2 and is with requirement.
The present invention adopts mesh band type resistor furnace, titanium sponge oxygenation is realized by heated oxide process titanium sponge particles, the present invention is by controlling the measures such as heating-up temperature, temperature retention time, layer thickness, raw material granularity and furnace ventilation amount, quantitative oxygenation can be realized, and it is even to carry out the welded tube TA2 ingot casting oxygen content of melting by the titanium sponge after this process oxidizes process, cold rolling welded tube TA2 tape thickness fluctuation meets the demands, and can increase substantially the quality of TA2 welded tube and reduce its production cost.Compared with the prior art, this technique does not need to add TiO in the present invention simultaneously
2, thoroughly can solve titanium welding pipe oxygen content segregation problems.
The slab oxygen content of the titanium sponge institute melting after oxidation processes of the present invention is even, thoroughly can solve the problem of welded tube TA2 ingot casting oxygen content segregation, significantly promote the yield rate of titanium welding pipe and reduce its production cost, and different oxygenation amounts can be realized by the adjustment of technological parameter, meet the different market demands.Titanium sponge after process of the present invention, adopt EB stove or arc melting, melting once can ensure the uniformity of oxygen content, without the need to secondary smelting, has with short production cycle, low cost and other advantages etc.
Part not in the detailed description of the invention is prior art.
The embodiment selected in this article in order to open object of the present invention, currently thinks to be suitable for, but it is to be understood that the present invention is intended to comprise all changes belonging to the embodiment in this design and invention scope and improvement.
Claims (6)
1. a welded tube TA2 level titanium sponge heated oxide oxygenation method, is characterized in that: specifically comprise the steps:
One, get the raw materials ready:
First select granularity to be the titanium sponge of 0.83 ~ 25.4mm, control barreled titanium sponge lump, flaw-piece titanium, rising head Ti content;
Two, preparation machine:
Connect step, according to expection oxygenation amount, the oxidizing temperature of setting mesh band type resistor furnace and temperature retention time, set the stone height of mesh bag transmission frequency and automatic laying device simultaneously;
Three, blanking oxidation:
Connect step, after the furnace temperature of mesh band type resistor furnace rises to design temperature, open the convection flow fan on mesh band type resistor furnace, vibrating feeder (conveyer) and automatic laying device, start blanking oxidation, impel oxygen and titanium sponge in air to react with the effect realizing oxygenation by heating;
Four, argon-filled protection:
Connect step, argon-filled protection, in case titanium sponge burns in mesh band type resistor furnace oxidizing process, once burn, close fire door, and carry out argon filling fire extinguishing, lower equipment loss risk;
Five, barrelling:
Connect step, after oxidation terminates, titanium sponge is cooled to 0 ~ 200 DEG C of barrelling with conveyer belt;
Six, check:
Connect step, oxidation-treated titanium sponge batching adopts EB stove to carry out melting ingot casting and follow-up rolling, confirms titanium sponge heated oxide oxygenation effect.
2. welded tube TA2 level titanium sponge heated oxide oxygenation method according to claim 1, is characterized in that: in described second step, oxidizing temperature scope is 450 ~ 650 DEG C.
3. welded tube TA2 level titanium sponge heated oxide oxygenation method according to claim 1, is characterized in that: in described second step, temperature retention time is 25 ~ 60min.
4. welded tube TA2 level titanium sponge heated oxide oxygenation method according to claim 1, is characterized in that: in described second step, mesh bag transmission frequency is 10 ~ 40HZ.
5. welded tube TA2 level titanium sponge heated oxide oxygenation method according to claim 1, is characterized in that: in described second step, stone height is 20 ~ 60mm.
6. welded tube TA2 level titanium sponge heated oxide oxygenation method according to claim 1, it is characterized in that: the convection flow fan in described 3rd step can ensure the uniformity of temperature in burner hearth, air recoverable amount in increase burner hearth that simultaneously can be suitable, to reach the effect of strengthening oxygenation.
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| CN201510138689.9A CN104772468A (en) | 2015-03-27 | 2015-03-27 | Heating oxidation oxygenation method of titanium sponge for TA2-grade welded pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211270A (en) * | 2011-04-06 | 2011-10-12 | 宝鸡鑫泽钛镍有限公司 | Process for manufacturing high-precision titanium and titanium alloy tube |
| CN102230097A (en) * | 2011-03-31 | 2011-11-02 | 西北有色金属研究院 | Preparation method of titanium alloy bars |
| CN103526050A (en) * | 2013-09-30 | 2014-01-22 | 洛阳双瑞万基钛业有限公司 | Production technology for welded pipe level sponge titanium |
| CN103820654A (en) * | 2014-02-25 | 2014-05-28 | 洛阳双瑞精铸钛业有限公司 | Uniform oxygenation device for titanium sponge and method thereof |
| CN203754787U (en) * | 2014-02-25 | 2014-08-06 | 洛阳双瑞精铸钛业有限公司 | Device for evenly increasing oxygen content of titanium sponge |
-
2015
- 2015-03-27 CN CN201510138689.9A patent/CN104772468A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230097A (en) * | 2011-03-31 | 2011-11-02 | 西北有色金属研究院 | Preparation method of titanium alloy bars |
| CN102211270A (en) * | 2011-04-06 | 2011-10-12 | 宝鸡鑫泽钛镍有限公司 | Process for manufacturing high-precision titanium and titanium alloy tube |
| CN103526050A (en) * | 2013-09-30 | 2014-01-22 | 洛阳双瑞万基钛业有限公司 | Production technology for welded pipe level sponge titanium |
| CN103820654A (en) * | 2014-02-25 | 2014-05-28 | 洛阳双瑞精铸钛业有限公司 | Uniform oxygenation device for titanium sponge and method thereof |
| CN203754787U (en) * | 2014-02-25 | 2014-08-06 | 洛阳双瑞精铸钛业有限公司 | Device for evenly increasing oxygen content of titanium sponge |
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