JPH02258939A - Heat-resistant material - Google Patents
Heat-resistant materialInfo
- Publication number
- JPH02258939A JPH02258939A JP7677989A JP7677989A JPH02258939A JP H02258939 A JPH02258939 A JP H02258939A JP 7677989 A JP7677989 A JP 7677989A JP 7677989 A JP7677989 A JP 7677989A JP H02258939 A JPH02258939 A JP H02258939A
- Authority
- JP
- Japan
- Prior art keywords
- ductility
- resistant material
- atomic
- heat
- intermetallic compound
- 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
- 239000003779 heat-resistant material Substances 0.000 title claims abstract description 7
- 229910000765 intermetallic Inorganic materials 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 229910021362 Ti-Al intermetallic compound Inorganic materials 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910010038 TiAl Inorganic materials 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は軽量の耐熱材料であって、Ｔｉ合金あるいは超
合金の代替材料として、航空機分野、自動車分野等広範
囲に応用される材料に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a lightweight heat-resistant material that is widely applied in the aircraft field, automobile field, etc. as an alternative material to Ti alloys or superalloys. be.
［従来の技術］
ＴｉＡｌ系金属間化合物は軽量で、かつ高温強度、耐酸
化性に優れていることが知られている。[Prior Art] TiAl-based intermetallic compounds are known to be lightweight and have excellent high-temperature strength and oxidation resistance.
［発明が解決しようとする課ｇｒＪ］
上記ＴｉＡｌ系金属間化合物は、常温での延性が乏しく
、かつ難加工材であるため、現在はとんど実用化に至っ
ていない。そこで本発明は、このＴｔＡｌ系金属間化合
物の常温における延性を高めて加工性を改善し、その実
用化を促進せんとするものである。[Problems to be Solved by the Invention] The TiAl-based intermetallic compound has poor ductility at room temperature and is a difficult-to-process material, so it has hardly been put into practical use at present. Therefore, the present invention aims to improve the workability of this TtAl-based intermetallic compound by increasing its ductility at room temperature, and to promote its practical application.
［課題を解決するための手段］
本発明はＡＩを３８原子％以上６２原子％以下含むＴｉ
Ａｌ金属間化合物において、０６１２原子％以上１０原
子％以下のＣおよび／またはＮを、あるいはさらにこれ
に０．０１原子％以上ＩＯ原子％以下のＣｒを含有する
ことを特徴とする耐熱性材料である。[Means for Solving the Problems] The present invention provides Ti containing 38 atomic % or more and 62 atomic % or less of AI.
A heat-resistant material characterized by containing C and/or N in an amount of 0612 atomic % or more and 10 atomic % or less in an Al intermetallic compound, or further containing Cr in an amount of 0.01 atomic % or more and IO atomic % or less. be.
上記においてＡＩの瓜が３８原子％未満ではＴｉＡ１金
属間化合物とならず、また６２原子％を越えると延性が
低下する。ＣとＮとは延性を向上させるもので、０．１
２原子％未満では延性の向上がみられず、１０原子％を
越えると延性の向上がみられない。これらは両者合計で
１０原子％を越えてはいけない。Ｃ「も延性を向上させ
るもので、０．０１原子％未満および■００原子を越え
るとその効果がみられなくなる。In the above, if the amount of Al melon is less than 38 at %, the TiA1 intermetallic compound will not be formed, and if it exceeds 62 at %, the ductility will decrease. C and N improve ductility and are 0.1
If it is less than 2 atomic %, no improvement in ductility is observed, and if it exceeds 10 atomic %, no improvement in ductility is observed. The total amount of both must not exceed 10 atomic %. C' also improves ductility, and if it is less than 0.01 atom % or exceeds 00 atoms, its effect will no longer be seen.
［作 用コ
Ｃ，Ｎ、Ｃｒの複合添加によって延性を向上する点につ
いて詳述すると、延性に寄与する因子として、■結晶の
軸比（Ｃ／ａ）の１への接近、■予期以上の体積減少お
よび■粒界強度の上昇がある。■はＴｉＡ１が元来有す
る変形の異方性をより等方的に変化させ延性を改善する
ものであり、■は結晶中の電子密度を高め原子間結合を
増大させ、■は粒界破壊を生じにくくして破壊開始を遅
らせ、強度および延性を改善するものである。[Effect] To explain in detail how the combined addition of C, N, and Cr improves ductility, the following factors contribute to ductility: There is a decrease in volume and ■an increase in grain boundary strength. ■ is to improve ductility by changing the original deformation anisotropy of TiA1 to be more isotropic, ■ is to increase electron density in the crystal and increase interatomic bonding, and ■ is to reduce grain boundary fracture. This suppresses the occurrence of fracture, delays the onset of fracture, and improves strength and ductility.
本発明におけるＣとＣｒとはそれぞれ■、■および■の
効果をもち、同時に添加した場合相乗的に効果が現われ
る。又、Ｎは■と■の効果をもち、Ｃ「との複合添加に
より相乗効果が現われる。C and Cr in the present invention have the effects of (1), (2) and (2), respectively, and when added at the same time, a synergistic effect appears. In addition, N has the effects of ■ and ■, and when combined with C, a synergistic effect appears.
［実施例］
原材料として、９９．９％のＴｉおよび９９．９９％の
ＡＩを使用し、アルゴン雰囲気アーク溶解により、表１
、表２に示す試料を作製し、１１５０℃で６０時間焼鈍
処理後、引張試験片に成形し、引張試験を行った。その
試験結果も表１、表２に併記した。[Example] 99.9% Ti and 99.99% AI were used as raw materials, and the results shown in Table 1 were obtained by arc melting in an argon atmosphere.
The samples shown in Table 2 were prepared, and after annealing at 1150° C. for 60 hours, they were formed into tensile test pieces and subjected to a tensile test. The test results are also listed in Tables 1 and 2.
表１
表２
［発明の効果］
本発明によれば、ＴｉＡｌ系金属間化合物の延性を改良
することができる。そして、かかる材料はＴｉ合金、超
合金の代替材料として航空機分野、自動車分野等広範囲
に応用される。Table 1 Table 2 [Effects of the Invention] According to the present invention, the ductility of TiAl-based intermetallic compounds can be improved. Such materials are widely used as substitute materials for Ti alloys and superalloys, such as in the aircraft and automobile fields.
Claims (2)
ｌ金属間化合物において、０．１２原子％以上１０原子
％以下のＣおよび／またはＮを含有することを特徴とす
る耐熱性材料。(1) TiA containing Al at 38 atomic % or more and 62 atomic % or less
1. A heat-resistant material characterized by containing 0.12 atomic % or more and 10 atomic % or less of C and/or N in an intermetallic compound.
上１０原子％以下のＣｒを含有する耐熱材料。(2) The heat-resistant material according to claim (1), further containing 0.01 atomic % or more and 10 atomic % or less of Cr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7677989A JPH02258939A (en) | 1989-03-30 | 1989-03-30 | Heat-resistant material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7677989A JPH02258939A (en) | 1989-03-30 | 1989-03-30 | Heat-resistant material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02258939A true JPH02258939A (en) | 1990-10-19 |
Family
ID=13615082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7677989A Pending JPH02258939A (en) | 1989-03-30 | 1989-03-30 | Heat-resistant material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02258939A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152960A (en) * | 1990-05-18 | 1992-10-06 | Toyota Jidosha Kabushiki Kaisha | Titanium-aluminum intermetallic having nitrogen in solid solution |
| US5252150A (en) * | 1990-05-18 | 1993-10-12 | Toyota Jidosha Kabushiki Kaishi | Process for producing nitrogen containing Ti--Al alloy |
| JP2019094547A (en) * | 2017-11-27 | 2019-06-20 | 日本製鉄株式会社 | Three-dimensional laminate molding false sponge titanium, manufacturing method therefor, and aggregate thereof |
-
1989
- 1989-03-30 JP JP7677989A patent/JPH02258939A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152960A (en) * | 1990-05-18 | 1992-10-06 | Toyota Jidosha Kabushiki Kaisha | Titanium-aluminum intermetallic having nitrogen in solid solution |
| US5252150A (en) * | 1990-05-18 | 1993-10-12 | Toyota Jidosha Kabushiki Kaishi | Process for producing nitrogen containing Ti--Al alloy |
| JP2019094547A (en) * | 2017-11-27 | 2019-06-20 | 日本製鉄株式会社 | Three-dimensional laminate molding false sponge titanium, manufacturing method therefor, and aggregate thereof |
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