JPH04160128A - Oxidization-resistant tial intermettalic compound - Google Patents
Oxidization-resistant tial intermettalic compoundInfo
- Publication number
- JPH04160128A JPH04160128A JP28366790A JP28366790A JPH04160128A JP H04160128 A JPH04160128 A JP H04160128A JP 28366790 A JP28366790 A JP 28366790A JP 28366790 A JP28366790 A JP 28366790A JP H04160128 A JPH04160128 A JP H04160128A
- Authority
- JP
- Japan
- Prior art keywords
- compd
- tial
- compound
- intermetallic
- oxidation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 31
- 150000001875 compounds Chemical class 0.000 title description 4
- 229910010038 TiAl Inorganic materials 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims description 27
- 229910000765 intermetallic Inorganic materials 0.000 claims description 18
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- OQPDWFJSZHWILH-UHFFFAOYSA-N [Al].[Al].[Al].[Ti] Chemical compound [Al].[Al].[Al].[Ti] OQPDWFJSZHWILH-UHFFFAOYSA-N 0.000 abstract description 4
- 229910021324 titanium aluminide Inorganic materials 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 13
- 239000011734 sodium Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000004584 weight gain Effects 0.000 description 3
- 235000019786 weight gain Nutrition 0.000 description 3
- 101100064079 Mus musculus Pdss1 gene Proteins 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、優れた耐酸化性能を有するＴｉＡｊ！系金属
間他金属間化合物。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides TiAj! having excellent oxidation resistance. Intermetallic and other intermetallic compounds.
チタニウムアルミナイド（ＴｉＡｆｉ系金属間化合物）
は高温強度に優れる軽量合金であることから、とくに吸
・排気パルプやピストンピンのような内燃機関用の耐熱
部材として有用性が期待されている。Titanium aluminide (TiAfi-based intermetallic compound)
Since it is a lightweight alloy with excellent high-temperature strength, it is expected to be particularly useful as heat-resistant parts for internal combustion engines, such as intake/exhaust pulp and piston pins.
この種の耐熱部材においては、要求特性として高温強度
のほかに酸化に対する強い抵抗性の具備が重要であるが
、ＴｉＡｊ！系金属間他金属間化合物に十分な耐酸化性
を備える材料ではない。In addition to high-temperature strength, it is important for this type of heat-resistant member to have strong resistance to oxidation, but TiAj! It is not a material that has sufficient oxidation resistance for intermetallic and other intermetallic compounds.
このため、Ｓｉ、Ｙ、Ｎｂ等の合金成分を添加してＴｉ
Ａｆ基合金の耐酸化性を改善する試みが提案されている
（特公平１−２９８５８号公報、特開平１−２５９１３
号公報）。Therefore, by adding alloy components such as Si, Y, and Nb, Ti
Attempts to improve the oxidation resistance of Af-based alloys have been proposed (Japanese Patent Publication No. 1-29858, Japanese Patent Application Laid-open No. 1-25913).
Publication No.).
〔発明が解決しようとする課Ｂ］
本発明は、上記の合金成分とは異質のＮａおよびＣ２成
分の微量含有がチタニウムアルミナイドの耐酸化性を大
幅に向上させる機能があることを解明して開発に至った
ものである。[Problem B to be solved by the invention] The present invention was developed based on the discovery that the inclusion of trace amounts of Na and C2 components, which are different from the above-mentioned alloy components, has the ability to significantly improve the oxidation resistance of titanium aluminide. This is what led to this.
したがって、本発明の目的は他の具備特性を損ねずに優
れた耐酸化性を示すＴｉＡｊｌ！系金属間化合金属間化
合物ことにある。Therefore, an object of the present invention is to provide TiAjl! which exhibits excellent oxidation resistance without sacrificing other properties. Intermetallic compounds are intermetallic compounds.
上記の目的を達成するための本発明による耐酸化性Ｔｉ
Ａｌ２系金属間化合物は、Ａｌ４０〜５０ａｔ％で残部
がＴｉからなり、Ｎａまたは／およびＣＥを０．０１〜
０．５ｗｔ％含有することを構成上の特徴とする。Oxidation-resistant Ti according to the present invention to achieve the above objects
The Al2-based intermetallic compound consists of 40 to 50 at% Al, the balance being Ti, and 0.01 to 50 at% of Na or/and CE.
The structural feature is that it contains 0.5 wt%.
また、必要に応じ、材料の延性を向上させる目的で前記
の組成にＭｎ０．５〜５ｗｔ％を含有させることができ
る。Furthermore, if necessary, 0.5 to 5 wt% of Mn can be included in the above composition for the purpose of improving the ductility of the material.
本発明のベース組成は、Ａｊ！４０〜５０ａｔ％（２７
，３〜３６ｗｔＸ）、残りがＴｉからなる。Ａｌ２が４
０ａｔ％を下廻る場合にはＴｉ、Ａｊ！相の構成比率が
高くなって耐酸化性の後退を招き、他方、５０ａｔ％を
越える組成ではＴｉＡｆ単相が形成し易くなって、延性
が損なわれる。The base composition of the present invention is Aj! 40-50 at% (27
, 3 to 36wtX), and the rest is Ti. Al2 is 4
If it falls below 0at%, Ti, Aj! The composition ratio of the phase becomes high, leading to a decline in oxidation resistance, and on the other hand, if the composition exceeds 50 at%, a TiAf single phase tends to form, impairing ductility.
ＮａおよびＣｊ２は耐酸化性の付与に機能する成分で、
ＮａまたはＣｌもしくはこれらの両成分として０．０１
〜０．５ｗｔ％の範囲で含有する。含有率が、前記範囲
の下限値未満であると耐酸化性の向上が認められず、ま
た上限値を越えると残留ボアが多くなって機械的特性が
劣化する。Na and Cj2 are components that function to impart oxidation resistance,
0.01 as Na or Cl or both components
It is contained in a range of 0.5 wt%. If the content is less than the lower limit of the above range, no improvement in oxidation resistance will be observed, and if it exceeds the upper limit, residual bores will increase and mechanical properties will deteriorate.
必要に応じて含有させるＭｎは０，５〜５ｗｔ％の量範
囲が好適で、０．５ｗｔ％未満では延性の向上効果が不
十分となり、５ｗｔ％を越える量はもはや延性向上に機
能しない。The amount of Mn to be included if necessary is preferably in the range of 0.5 to 5 wt%; if it is less than 0.5 wt%, the effect of improving ductility will be insufficient, and if the amount exceeds 5 wt%, it will no longer function to improve ductility.
本発明による耐酸化性ＴｉＡｊｊ系金属間他金属間化合
物るためには、従来から慣用されている溶製法のほか、
原料としてＴｉ粉末、Ａ１粉末およびＡｆｆｉ−Ｍｎ合
金粉末を用いる反応焼結法を適用することができる０本
発明の目的には、特にナトリウム法によるＴｉ粉末を原
料とする反応焼結法を用いることが好適である。In order to produce the oxidation-resistant TiAjj-based intermetallic compound according to the present invention, in addition to the conventional melting method,
A reactive sintering method using Ti powder, A1 powder, and Affi-Mn alloy powder as raw materials can be applied. For the purpose of the present invention, a reactive sintering method using Ti powder as a raw material by the sodium method is particularly applicable. is suitable.
本発明の組成によれば、ＴｊＡ１組織中に含有されてい
る微量のＮａまたは／およびＣ！酸成分材料の耐酸化性
を大幅に向上させるために有効機能する。この機構につ
いては未だ解明するに至っていないが、前記の成分が他
の緒特性を後退させずに優れた耐酸化性を付与する作用
があることが実証された０例えば、特公昭６２−２１５
号公報に記載があるようにＴｊＡｊ！基合金に０． １
〜５．０ｗｔ％のＭｎを添加すると延性は改善されるが
、耐酸化性の改善効果はない。しかし、この合金組成に
おいても、本発明に従って特定量のＮａまたは／および
ＣＥを介在させると、延性を損ねることなしに優れた耐
酸化性を付与させることができる。According to the composition of the present invention, trace amounts of Na and/or C contained in the TjA1 tissue! It functions effectively to significantly improve the oxidation resistance of acid component materials. Although this mechanism has not yet been elucidated, it has been demonstrated that the above-mentioned components have the effect of imparting excellent oxidation resistance without deteriorating other properties.
As stated in the publication, TjAj! 0 to the base alloy. 1
Addition of ~5.0 wt% Mn improves ductility, but has no effect on improving oxidation resistance. However, even in this alloy composition, if a specific amount of Na and/or CE is interposed according to the present invention, excellent oxidation resistance can be imparted without impairing ductility.
したがって、常に軽量で高温強度ならびに耐酸化性に優
れるＴｉＡｌ系金属間化合物を提供することが可能とな
る。Therefore, it is possible to provide a TiAl-based intermetallic compound that is always lightweight and has excellent high-temperature strength and oxidation resistance.
以下、本発明の実施例を比較例と対比して説明する。 Examples of the present invention will be described below in comparison with comparative examples.
実施例１
それぞれ粒径が７４μ−以下のＴｉ粉末とＡｆｆｉ粉末
をＴｉ ３６ｗｔ％Ａ ｆ！ （Ｔｉ−５０ａｔＸＡ
Ｉ）の組成になるように混合した。Ｔｉ粉末は、ナトリ
ウム法によるものを用いた。Example 1 Ti powder and Affi powder each having a particle size of 74μ or less were mixed with Ti 36wt%A f! (Ti-50atXA
They were mixed to have the composition I). The Ti powder used was obtained by the sodium method.
この混合粉末を、直径」９２１、長さ３５０１の形状に
ＣＩＰ成形したのち、外径２０５＋＋ｎのアルミニウム
缶に封入して温度４５０℃、時間５ Ｈｒ。This mixed powder was CIP-molded into a shape with a diameter of 921 mm and a length of 350 mm, and then sealed in an aluminum can with an outer diameter of 205 ++ nm at a temperature of 450° C. for 5 hours.
減圧度１． ３ Ｘ １０−’Ｐａの条件で脱気処理し
た。Decompression degree 1. Degassing treatment was performed under the conditions of 3 x 10-'Pa.
ついで、アルミニウム缶ごと４００″Ｃの温度下で外径
７０−に押出し、目的形状に切削したのち、Ａｒガス雰
囲気中、１３００℃で１０時間の条件によりＨＩＰ処理
を施した。ＨＩＰ処理の昇温段階でＴ ｉ ＋Ａｌ−＝
Ｔ ｉ Ａｊ！の反応が進行し、ＴｉＡｌ系金属間化合
物に転化した。Next, the aluminum can was extruded to an outer diameter of 70 mm at a temperature of 400"C, cut into the desired shape, and then subjected to HIP treatment at 1300C for 10 hours in an Ar gas atmosphere. Increased temperature during HIP treatment. At the stage T i +Al−=
T i Aj! The reaction progressed and it was converted into a TiAl-based intermetallic compound.
得られたＴｉＡｊ！系金属間化合物には、Ｎａｐ。Obtained TiAj! For intermetallic compounds, Nap.
０５ｗｔ％とｃｚｏ、ｏｓｔ＊ｔ％が含まれていた。05wt% and czo, ost*t% were included.
上記のＨＩＰ材から７ Ｘ ７ Ｘ １５ｍ−の試片を
切り出して高純度アルミするつぼに入れ、大気中で９０
０℃の温度に６時間および２４時間曝して酸化増量を測
定した。その結果を表１に示した。A specimen measuring 7 x 7 x 15 m was cut from the above HIP material, placed in a high-purity aluminum crucible, and heated in air for 90 minutes.
Oxidative weight gain was measured after exposure to a temperature of 0° C. for 6 hours and 24 hours. The results are shown in Table 1.
実施例２
粒径７４μ−以下のナトリウム法によるＴｉ粉末と同じ
く粒径７４μ−のＡＰ粉末をＴｉ−３３゜５＠ｔ％Ａ
ｌ （Ｔｉ−４７，２ａｔＸＡＩ） ２ 、 ５ ｗ
ｔ％Ｍｎの組成になるように混合し、これを直径１９２
ｍ５、長さ３５０■−の形状にＣＩＰ成形したのち、外
径２０５ｍ５＋のアルミニウム缶に封入して温度４５０
℃、時間５ Ｆｉｒ、減圧度１． ３ Ｘ １０−’Ｐ
ａの条件で脱気処理をおこなった。Example 2 Ti powder with a particle size of 74 μ- or less obtained by the sodium method and AP powder with a particle size of 74 μ- or less were used as Ti-33°5@t%A
l (Ti-47,2atXAI) 2, 5w
t%Mn composition, and this was mixed with a diameter of 192 mm.
After CIP forming into a shape of m5 and length 350cm-, it was sealed in an aluminum can with an outer diameter of 205m5+ and heated to a temperature of 450cm.
°C, time 5 Fir, degree of vacuum 1. 3 x 10-'P
Degassing treatment was performed under the conditions of a.
ついで、アルミニウム缶ごと外径７０Ｍ１１に押出して
のち、実施例１と同一条件によりＨＩＰ処理をおこなっ
てＴｉＡｌ系金属化合物とした。Next, the aluminum can was extruded to an outer diameter of 70 M11, and then subjected to HIP treatment under the same conditions as in Example 1 to obtain a TiAl-based metal compound.
得られたＴｉＡｆ！ｉＡｆ！化合物には、０．０８ｗｔ
％のＮａおよび０．ｌ０ｗｔ％のＣｌが含まれていた。The obtained TiAf! iAf! The compound contains 0.08wt
% Na and 0. It contained 10 wt% Cl.
上記のＨＩＰ材から７Ｘ７Ｘ２０ｍ−の試片を切り出し
、実施例１と同様して酸化試験をおこなった。測定され
た酸化増量の結果を、表１に併載した。A 7 x 7 x 20 m sample was cut out from the above HIP material and subjected to an oxidation test in the same manner as in Example 1. The measured oxidation weight gain results are also listed in Table 1.
実施例３
実施例Ｉと同様にして、ＮａＯ，０２ｔｐｒｔ％および
Ｃ１０，００５ｗｔ％を含むＴｉ−３６圓ｔ％ＡＩＶ。Example 3 Similar to Example I, Ti-36 tprt% AIV containing 02 tprt% NaO and 10,005 wt% C.
組成のＴｉＡｌ系金属間化合物を得た。A TiAl-based intermetallic compound having the following composition was obtained.
１ＴｉＡｆ系金属間他金属につき実施例１と同一条件で
酸化試験をおこない、その結果を表１に併載した。An oxidation test was conducted on 1TiAf-based intermetals and other metals under the same conditions as in Example 1, and the results are also listed in Table 1.
実施例４
実施例１と同様にして、Ｎａｐ、００５ｗｔ％およびＣ
Ｉｏ、０２ｈｔ％を含むＴｉ−３６ｗｔ％Ａ１組成のＴ
ｉＡｊ！系金属間他金属間化合物該ＴｉＡｆ！系金属系
他金属系化合物施例１と同一条件で酸化試験をおこない
、その結果を表１に併載した。Example 4 In the same manner as in Example 1, Nap, 005wt% and C
Ti-36wt%A1 composition containing Io, 02ht%
iAj! TiAf! system intermetallic and other intermetallic compounds An oxidation test was conducted under the same conditions as in Example 1 for metal-based and other metal-based compounds, and the results are also listed in Table 1.
比較例１
実施例１のＨＩＰ材を、プラズマアークにより熔解処理
してＮａとＣ１成分量を減少させ、その合計含有量が０
．０１ｗｔ％未満（Ｎａ Ｏ，００３ｈｔχ、ＣＩＯ，
００４ｈｔχ）のＴｉＡｆ系金属間化合物を得た。Comparative Example 1 The HIP material of Example 1 was melted by plasma arc to reduce the amount of Na and C1 components, so that the total content was 0.
．． Less than 01wt% (NaO, 003htχ, CIO,
A TiAf-based intermetallic compound of 004htχ) was obtained.
この材料につき実施例１と同一条件で酸化試験をおこな
い、その結果を表１に示した。An oxidation test was conducted on this material under the same conditions as in Example 1, and the results are shown in Table 1.
比較例２
実施例２の）ＩＩＰ材を、プラズマアークにより熔解処
理してＮａとＣ２成分量を減少させ、その合計含有量が
０．０１ｗｔ％未満（Ｎａ ０．００５ｈｔχ、Ｃ１０
，００７ｈｔχ）のＴｉＡｆ！ｉＡｆ！化合物を得た。Comparative Example 2 The IIP material of Example 2 was melted by plasma arc to reduce the amount of Na and C2 components, and the total content was less than 0.01wt% (Na 0.005htχ, C10
,007htχ)'s TiAf! iAf! The compound was obtained.
この材料につき実施例１と同一条件で酸化試験をおこな
い、その結果を表１に併載した。An oxidation test was conducted on this material under the same conditions as in Example 1, and the results are also listed in Table 1.
表１の結果から、本発明の組成要件を満たす実施例１〜
４のＴｉＡｉＶ、系金属間化合物は、組成要件を外れる
比較例１〜２に比べて酸化増量が有意に減少しており、
耐酸化性が大幅に改善されていることが判明する。なお
、本発明の組成によって密度、高温強度、延性等の特性
変動は認められなかった。From the results in Table 1, it can be seen that Examples 1 to 1 satisfy the composition requirements of the present invention.
The TiAiV system intermetallic compound of No. 4 has significantly reduced oxidation weight gain compared to Comparative Examples 1 and 2, which do not meet the composition requirements.
It turns out that the oxidation resistance is significantly improved. Note that no changes in properties such as density, high-temperature strength, and ductility were observed depending on the composition of the present invention.
以上のとおり、本発明によればチタニウムアルミナイド
の有する固有の軽量性や高温強度性能に加えて優れた耐
酸化性を兼備するＴｉＡｌ系金属間他金属間化合物るこ
とができる。したがって、これらの緒特性が要求される
吸・排気パルプあるいはピストンピンなどの内燃機関用
耐熱部材に適用して有用性が期待される。As described above, according to the present invention, a TiAl-based intermetallic compound and other intermetallic compounds can be produced which have excellent oxidation resistance in addition to the inherent lightness and high-temperature strength properties of titanium aluminide. Therefore, it is expected that the present invention will be useful in application to heat-resistant members for internal combustion engines, such as intake/exhaust pulp or piston pins, which require these properties.
出願人 住友軽金属工業株式会社 代理人 弁理士 高畑正也（外１名）Applicant: Sumitomo Light Metal Industries, Ltd. Agent: Patent attorney: Masaya Takahata (1 other person)
Claims (1)
または／およびＣｌを０．０１〜０．５ｗｔ％含有する
ことを特徴とする耐酸化性ＴｉＡｌ系金属間化合物。 ２、Ｍｎ０．５〜５ｗｔ％を含む請求項１記載の耐酸化
性ＴｉＡｌ系金属間化合物。[Claims] 1. Al consists of 40 to 50 at%, the balance is Ti, and Na
An oxidation-resistant TiAl-based intermetallic compound containing 0.01 to 0.5 wt% of or/and Cl. 2. The oxidation-resistant TiAl-based intermetallic compound according to claim 1, containing 0.5 to 5 wt% of Mn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28366790A JPH04160128A (en) | 1990-10-22 | 1990-10-22 | Oxidization-resistant tial intermettalic compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28366790A JPH04160128A (en) | 1990-10-22 | 1990-10-22 | Oxidization-resistant tial intermettalic compound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04160128A true JPH04160128A (en) | 1992-06-03 |
Family
ID=17668503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28366790A Pending JPH04160128A (en) | 1990-10-22 | 1990-10-22 | Oxidization-resistant tial intermettalic compound |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04160128A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451366A (en) * | 1992-07-17 | 1995-09-19 | Sumitomo Light Metal Industries, Ltd. | Product of a halogen containing Ti-Al system intermetallic compound having a superior oxidation and wear resistance |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141740A (en) * | 1984-08-02 | 1986-02-28 | Natl Res Inst For Metals | Intermetallic tial compound-base heat resistant alloy |
-
1990
- 1990-10-22 JP JP28366790A patent/JPH04160128A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141740A (en) * | 1984-08-02 | 1986-02-28 | Natl Res Inst For Metals | Intermetallic tial compound-base heat resistant alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451366A (en) * | 1992-07-17 | 1995-09-19 | Sumitomo Light Metal Industries, Ltd. | Product of a halogen containing Ti-Al system intermetallic compound having a superior oxidation and wear resistance |
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