CN105018791A - Titanium-iron-aluminum-carbon alloy - Google Patents
Titanium-iron-aluminum-carbon alloy Download PDFInfo
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- 229910001339 C alloy Inorganic materials 0.000 title claims abstract description 9
- -1 Titanium-iron-aluminum-carbon Chemical compound 0.000 title abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 claims 1
- 239000000956 alloy Substances 0.000 abstract description 39
- 229910045601 alloy Inorganic materials 0.000 abstract description 37
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 10
- 239000010936 titanium Substances 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052719 titanium Inorganic materials 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 238000002844 melting Methods 0.000 description 15
- 230000008018 melting Effects 0.000 description 15
- 238000010891 electric arc Methods 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 7
- 238000005275 alloying Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001040 Beta-titanium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种钛铁铝碳合金，其质量百分比如下：Fe的含量为9.5-10.5％，Al的含量为2.5-3.5％，C的含量为0.03-0.07％，余量为Ti和不可避免的杂质。本发明以钛合金体系为对象，以钛铁两种元素为合金主体，通过加入少量铝元素和微量碳元素，使其成为具有较高强度和一定塑性的钛合金；采用本发明配比的钛合金不仅较容易熔炼，而且成本低廉。A titanium-iron-aluminum-carbon alloy, the mass percent of which is as follows: the content of Fe is 9.5-10.5%, the content of Al is 2.5-3.5%, the content of C is 0.03-0.07%, and the balance is Ti and unavoidable impurities. The present invention takes the titanium alloy system as the object, takes two elements of titanium and iron as the alloy main body, and makes it a titanium alloy with high strength and certain plasticity by adding a small amount of aluminum element and trace carbon element; Alloys are not only easier to melt, but also inexpensive.
Description
技术领域technical field
本发明涉及材料科学和有色金属及其合金领域，特别是钛合金。The invention relates to the fields of material science and non-ferrous metals and their alloys, especially titanium alloys.
背景技术Background technique
钛是一种中低密度金属(其密度为4.5)，具有较高的比强度，中温性能好，无磁性，具有极强的耐腐蚀能力，焊接性能好，是性能优异的金属结构材料，在航空、航天、舰船、核电、武器装备、石油开采和生物医学材料等高端技术领域日益占据主导地位。钛多以合金形式出现，如通过加入各类β相稳定元素即钼、钨、钒、铬、铌、钽、锰、钴等获得的TB型钛合金强度较高，是高性能钛合金研发应用的重要内容。由于一些β相稳定元素熔点较高，难以熔炼，例如钒(熔点1890℃)、钼(熔点2610℃)、铬(熔点1907℃)、钽(熔点2996℃)、钨(熔点3380℃)，这些高熔点原料的使用必将提高钛合金的制造成本。另外，根据粗略市场调查，一些合金化元素的价格高昂，例如，钒(约3000元/KG)、钼(约500元/KG)、铬(约650元/KG)、钽(约4800元/KG)、钨(约500元/KG)。综合上述各因素，不利于钛合金的规模化应用。Titanium is a medium and low density metal (its density is 4.5), has high specific strength, good medium temperature performance, non-magnetic, strong corrosion resistance, good welding performance, and is an excellent metal structural material. High-end technology fields such as aviation, aerospace, ships, nuclear power, weapons and equipment, oil exploration and biomedical materials are increasingly occupying a dominant position. Titanium mostly appears in the form of alloys, such as TB-type titanium alloys obtained by adding various β-phase stable elements such as molybdenum, tungsten, vanadium, chromium, niobium, tantalum, manganese, cobalt, etc. important content. Due to the high melting point of some β-phase stable elements, it is difficult to melt, such as vanadium (melting point 1890 ° C), molybdenum (melting point 2610 ° C), chromium (melting point 1907 ° C), tantalum (melting point 2996 ° C), tungsten (melting point 3380 ° C), these The use of high melting point raw materials will definitely increase the manufacturing cost of titanium alloys. In addition, according to a rough market survey, the prices of some alloying elements are high, for example, vanadium (about 3,000 yuan/KG), molybdenum (about 500 yuan/KG), chromium (about 650 yuan/KG), tantalum (about 4,800 yuan/KG) KG), tungsten (about 500 yuan/KG). Combining the above factors is not conducive to the large-scale application of titanium alloys.
发明内容Contents of the invention
本发明的目的在于提供一种原料的熔点和成本均较低的钛铁铝碳合金。该合金为一种具有较高铁元素及碳元素含量的TB型钛铁铝碳合金。The object of the present invention is to provide a titanium-iron-aluminum-carbon alloy with low raw material melting point and low cost. The alloy is a TB-type titanium-iron-aluminum-carbon alloy with relatively high content of iron and carbon elements.
本发明的技术方案是通过下述方式实现的：Technical scheme of the present invention is realized in the following manner:
1、本发明的钛铁铝碳合金材料，其质量百分比如下：Fe的含量为9.5-10.5％，Al的含量为2.5-3.5％，C的含量为0.03-0.07％，余量为Ti和不可避免的杂质。1, the titanium-iron-aluminum-carbon alloy material of the present invention, its mass percent is as follows: the content of Fe is 9.5-10.5%, the content of Al is 2.5-3.5%, the content of C is 0.03-0.07%, and the balance is Ti and must not Avoid impurities.
2、本发明合金的制备方法2, the preparation method of alloy of the present invention
本发明的制备方法为：按照合金给定配比称取原料配制合金，将配好成分的合金置于电弧炉的水冷铜坩埚中，利用真空非自耗电弧炉进行熔炼，熔炼前电弧炉的背底真空高于2.0×10-2Pa，弧焊电源电流工作范围为300-500A，电压工作范围为15-30V(熔炼过程中根据熔体状态需要适当调整熔炼设备相关参数)；熔炼完毕的合金锭随坩埚冷却，为确保合金成分均匀，每个合金锭要在电弧炉中反复熔炼最少8次。熔炼均匀的合金从坩埚中取出后，用于铸造态样品性能分析或后续加工。The preparation method of the present invention is as follows: taking the raw materials according to the given proportion of the alloy to prepare the alloy, placing the prepared alloy in the water-cooled copper crucible of the electric arc furnace, using a vacuum non-consumable electric arc furnace for melting, and the electric arc furnace before melting The background vacuum is higher than 2.0×10 -2 Pa, the current working range of the arc welding power supply is 300-500A, and the working voltage range is 15-30V (the relevant parameters of the melting equipment should be adjusted according to the state of the melt during the melting process); the melting is completed The alloy ingots are cooled with the crucible. In order to ensure uniform alloy composition, each alloy ingot must be repeatedly smelted in an electric arc furnace for at least 8 times. After the homogeneously smelted alloy is taken out of the crucible, it is used for performance analysis or subsequent processing of the cast sample.
根据铁钛二元合金相图，富钛一端的合金由钛基体和铁钛相组成，基体β钛为体心立方相，具有极佳的塑性，铁钛相作为合金化合物相，在基体中主要起到强化的作用。通过合理选择合金成分及加入其它合金元素如铝、碳等，实现细化基体组织和第二相，优化合金的相组成，改善其形貌和分布，可以进一步提高合金的力学性能。According to the phase diagram of iron-titanium binary alloy, the alloy at the titanium-rich end is composed of titanium matrix and iron-titanium phase. The matrix β-titanium is a body-centered cubic phase with excellent plasticity. The iron-titanium phase is the alloy compound phase, mainly in the matrix play a strengthening role. By rationally selecting alloy components and adding other alloying elements such as aluminum and carbon, the matrix structure and second phase can be refined, the phase composition of the alloy can be optimized, and its morphology and distribution can be improved to further improve the mechanical properties of the alloy.
本发明中Fe为主要合金化元素，Al为次要合金化元素，C为微量合金化元素。所用合金元素的作用包括稳定β相、固溶强化、第二相强化、改善合金微观组织及降低合金中氧元素对性能的影响等。In the present invention, Fe is the main alloying element, Al is the secondary alloying element, and C is the trace alloying element. The functions of the alloying elements used include stabilizing the β phase, solid solution strengthening, second phase strengthening, improving the microstructure of the alloy and reducing the influence of oxygen in the alloy on the performance, etc.
本发明与现有技术相比具有如下优点：Compared with the prior art, the present invention has the following advantages:
1、本发明以钛合金体系为对象，以钛铁两种元素为合金主体，通过加入少量铝元素和微量碳元素，使其成为具有较高强度和一定塑性的钛合金。1. The present invention takes the titanium alloy system as the object, uses two elements of titanium and iron as the main body of the alloy, and adds a small amount of aluminum and trace carbon elements to make it a titanium alloy with high strength and certain plasticity.
2、采用本发明配比的钛合金不仅较容易熔炼，而且成本低廉。2. The titanium alloy adopting the ratio of the present invention is not only easier to melt, but also has low cost.
附图说明Description of drawings
图1为轧制态合金单轴拉伸条件下的工程应力-应变曲线图；Fig. 1 is the engineering stress-strain curve diagram under the uniaxial tension condition of as-rolled state alloy;
图2为热轧态合金的金相显微组织照片图。Figure 2 is a photo of the metallographic microstructure of the hot-rolled alloy.
具体实施方式Detailed ways
实例1Example 1
用87克纯钛丝、10克碳含量为0.56％的铁碳合金和3克纯铝等原料配料，用非自耗真空电弧炉熔炼。熔炼时电弧炉的背底真空高于2.0×10-2Pa，弧焊电源工作电流为400A，工作电压为20V。合金经初次熔炼成一个整体后，在坩埚中翻面进行二次熔炼，如此反复，共计8次。87 grams of pure titanium wire, 10 grams of iron-carbon alloy with a carbon content of 0.56%, and 3 grams of pure aluminum are used for melting in a non-consumable vacuum electric arc furnace. During smelting, the back vacuum of the electric arc furnace is higher than 2.0×10 -2 Pa, the working current of the arc welding power supply is 400A, and the working voltage is 20V. After the alloy is smelted into a whole for the first time, it is turned over in the crucible for the second smelting, and this is repeated for a total of 8 times.
待合金熔炼完毕，用电火花线切割从合金锭中切下长宽高分别为40、40、15的合金样品，于900℃进行多道次轧制，道次变形量控制在10％以内，总变形量为60％以上,轧制后合金用水淬或空冷的方式冷至室温。将合金板用电火花线切割成拉伸试样，用带有引伸计的拉伸力学试验机进行力学性能测试。测试结果表明合金具有优异的机械性能，具体如下表：After the alloy smelting is completed, alloy samples with length, width and height of 40, 40 and 15 are cut from the alloy ingot by wire electric discharge cutting, and multi-pass rolling is carried out at 900°C, and the deformation of each pass is controlled within 10%. The total deformation is more than 60%, and the alloy is cooled to room temperature by water quenching or air cooling after rolling. The alloy plate was cut into tensile specimens by wire electric discharge, and the mechanical properties were tested by a tensile mechanical testing machine with an extensometer. The test results show that the alloy has excellent mechanical properties, as shown in the following table:
表一 轧制态本发明合金的基本力学性能Table 1 The basic mechanical properties of the alloy of the present invention in the rolled state
从图1所示的本发明轧制态合金的单轴拉伸工程应力应变曲线图可以看出：所制备的合金的屈服强度较高，并且在单轴拉伸条件下其延伸率超过15％，是一种兼具较高强度和塑性的高性能钛合金材料。As can be seen from the uniaxial tensile engineering stress-strain curve diagram of the as-rolled alloy of the present invention shown in Fig. 1: the yield strength of the prepared alloy is higher, and its elongation exceeds 15% under uniaxial tensile conditions , is a high-performance titanium alloy material with high strength and plasticity.
从图2所示的轧制态本发明合金的金相显微组织照片图可以看出，合金的显微组织由钛基体和在基体中均匀分布的强化相组成，其中钛基体的平均晶粒尺寸大于100微米，经热轧处理后，可观察到一定的取向性。As can be seen from the metallographic microstructure photographs of the alloy of the present invention in the rolling state shown in Figure 2, the microstructure of the alloy consists of a titanium matrix and a strengthening phase uniformly distributed in the matrix, wherein the average grain size of the titanium matrix is greater than 100 microns, after hot rolling treatment, a certain orientation can be observed.
实例2Example 2
用87.5克纯钛丝、10克碳含量为0.7％的铁碳合金和2.5克纯铝等原料配料，用非自耗真空电弧炉熔炼。熔炼时电弧炉的背底真空高于2.0×10-2Pa，弧焊电源工作电流为500A，工作电压为30V。合金经初次熔炼成一个整体后，在坩埚中翻面进行二次熔炼，如此反复，共计8次。87.5 grams of pure titanium wire, 10 grams of iron-carbon alloy with a carbon content of 0.7% and 2.5 grams of pure aluminum are used for melting in a non-consumable vacuum electric arc furnace. During smelting, the back vacuum of the electric arc furnace is higher than 2.0×10 -2 Pa, the working current of the arc welding power supply is 500A, and the working voltage is 30V. After the alloy is smelted into a whole for the first time, it is turned over in the crucible for the second smelting, and this is repeated for a total of 8 times.
实例3Example 3
用86.5克纯钛丝、10克碳含量为0.3％的铁碳合金和3.5克纯铝等原料配料，用非自耗真空电弧炉熔炼。熔炼时电弧炉的背底真空高于2.0×10-2Pa，弧焊电源工作电流为300A，工作电压为15V。合金经初次熔炼成一个整体后，在坩埚中翻面进行二次熔炼，如此反复，共计8次。86.5 grams of pure titanium wire, 10 grams of iron-carbon alloy with a carbon content of 0.3% and 3.5 grams of pure aluminum are used for melting in a non-consumable vacuum electric arc furnace. During smelting, the back vacuum of the electric arc furnace is higher than 2.0×10 -2 Pa, the working current of the arc welding power supply is 300A, and the working voltage is 15V. After the alloy is smelted into a whole for the first time, it is turned over in the crucible for the second smelting, and this is repeated for a total of 8 times.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441714A (en) * | 2015-12-24 | 2016-03-30 | 燕山大学 | High-strength and high-plasticity titanium iron copper carbon alloy |
| CN105506376A (en) * | 2015-12-24 | 2016-04-20 | 燕山大学 | Low-cost and high-strength titanium-iron-aluminum-carbon alloy |
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN110951992A (en) * | 2019-11-28 | 2020-04-03 | 燕山大学 | Antibacterial medical titanium alloy with low elastic modulus |
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| CN103667788A (en) * | 2012-09-14 | 2014-03-26 | 北京工业大学 | Titanium alloy and thermal treatment process |
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| JPH09302429A (en) * | 1996-05-09 | 1997-11-25 | Sumitomo Metal Ind Ltd | Titanium alloy for living body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105441714A (en) * | 2015-12-24 | 2016-03-30 | 燕山大学 | High-strength and high-plasticity titanium iron copper carbon alloy |
| CN105506376A (en) * | 2015-12-24 | 2016-04-20 | 燕山大学 | Low-cost and high-strength titanium-iron-aluminum-carbon alloy |
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN110951992A (en) * | 2019-11-28 | 2020-04-03 | 燕山大学 | Antibacterial medical titanium alloy with low elastic modulus |
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