JPH0635631B2 - Manufacturing method of superplastic silicon nitride whisker reinforced aluminum alloy composite material. - Google Patents
Manufacturing method of superplastic silicon nitride whisker reinforced aluminum alloy composite material.Info
- Publication number
- JPH0635631B2 JPH0635631B2 JP1244767A JP24476789A JPH0635631B2 JP H0635631 B2 JPH0635631 B2 JP H0635631B2 JP 1244767 A JP1244767 A JP 1244767A JP 24476789 A JP24476789 A JP 24476789A JP H0635631 B2 JPH0635631 B2 JP H0635631B2
- Authority
- JP
- Japan
- Prior art keywords
- silicon nitride
- composite material
- aluminum alloy
- whisker reinforced
- nitride whisker
- 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.)
- Expired - Lifetime
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 18
- 229910052581 Si3N4 Inorganic materials 0.000 title claims description 16
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000002131 composite material Substances 0.000 title description 22
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001192 hot extrusion Methods 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 238000003483 aging Methods 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
- 238000005245 sintering Methods 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 238000003672 processing method Methods 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は窒化ケイ素ウイスカを強化材としてアルミニウ
ム合金（Ａｌ合金と称す）中に含み、しかも、超塑性変
形の特徴を生ずる複合金属材料の製造方法に関する。The present invention relates to the production of a composite metal material containing silicon nitride whiskers as a reinforcing material in an aluminum alloy (referred to as an Al alloy) and yet producing the characteristics of superplastic deformation. Regarding the method.
（従来の技術） セラミックス短繊維（ウイスカを含む）強化Ａｌ合金複
合材料は比弾性率が従来の金属材料の約２倍、比強度は
チタン合金に匹敵する程高く、また、耐熱性や耐摩耗性
に優れているのでピストンなどの中高温機械部品ばかり
でなく航空宇宙分野での構造材料としての実用化が図ら
れている。特に、航空宇宙分野でこの複合材料を利用す
るには複雑な形状で表面積が広くしかも立体的な構造部
材に成形加工する必要がある。このため、この複合材料
を板形状に圧延加工できること、圧延素材材の熱間プレ
ス成形が可能なこと、更に成形後の材料性質が加工前に
劣らないこと、が必要である。これに対する技術的解決
の一つとして、この複合材料の超塑性化が試みられてい
る。(Prior Art) Ceramic short fiber (including whiskers) reinforced Al alloy composite material has a specific elastic modulus about twice that of conventional metal materials, a specific strength as high as that of titanium alloys, heat resistance and wear resistance. Due to its excellent properties, it is being put to practical use not only as medium- and high-temperature mechanical parts such as pistons, but also as a structural material in the aerospace field. In particular, in order to use this composite material in the aerospace field, it is necessary to mold it into a three-dimensional structural member having a complicated shape and a large surface area. For this reason, it is necessary that the composite material can be rolled into a plate shape, that the material for rolling can be hot press-formed, and that the material properties after molding are not inferior to those before processing. As one of the technical solutions to this, superplasticization of this composite material has been attempted.
例えば、(a)炭化ケイ素（SiC）ウイスカ強化２１２４Ａ
ｌ合金複合材料、(b) SiCウイスカ強化７４７５Ａｌ合
金複合材料、(c)SiC粒子強化７０６４Ａｌ合金複合材料
については、複合材料を造った後に加工熱処理法（Ａｌ
合金アトリックスの微視的組織を微細化する加工法）に
より超塑性化が行われている。For example, (a) Silicon Carbide (SiC) whisker reinforced 2124A
l alloy composite material, (b) SiC whisker reinforced 7475Al alloy composite material, and (c) SiC particle reinforced 7064 Al alloy composite material, after the composite material is made, a thermomechanical treatment method (Al
Superplasticization is performed by a processing method for refining the microstructure of alloy Atrick.
また、本発明者らは(d)窒化ケイ素ウイスカ強化２１２
４Ａｌ合金複合材料を微細な２１２４Ａｌ合金粉末を用
いた粉末冶金法により造り、そのままの状態で、加工熱
処理を加えることなく、超塑性窒化ケイ素ウイスカ強化
Ａｌ合金複合材料を造ることができた。その他、(e)変
態超塑性加工法（加熱冷却を繰り返し、超塑性変形を発
現させる加工法）によりSiCウイスカ強化６０６１Ａｌ
合金複合材料に超塑性変形が生ずることが報告されてい
る。In addition, the present inventors (d) silicon nitride whisker reinforced 212
It was possible to produce a 4Al alloy composite material by a powder metallurgy method using a fine 2124Al alloy powder, and to produce a superplastic silicon nitride whisker reinforced Al alloy composite material as it was without performing a heat treatment. In addition, SiC whisker reinforced 6061Al by (e) transformation superplasticity processing method (processing method in which heating and cooling are repeated to develop superplastic deformation)
It has been reported that superplastic deformation occurs in alloy composite materials.
これらの従来の超塑性複合材料の問題点は、(a)，(b)，
(c)では、加工熱処理法（溶体化処理−時効処理−温間
圧延加工−再結晶処理）という複雑なプロセスを用いて
いる。しかし、実用的な方法として用いるために簡単な
プロセスが望まれている。また、(e)の方法は加工速度
が遅いのが欠点である。(a)と(d)では５２５℃で超塑性
変形させる際、２１２４Ａｌマトリックスに部分的に液
相が生ずるのでキャビティなどの欠陥を生じ易く、超塑
性変形後の機械的性質が変形前よりも劣化することも考
えられる。The problems of these conventional superplastic composite materials are (a), (b),
In (c), a complicated process of thermomechanical treatment (solution treatment-aging treatment-warm rolling-recrystallization treatment) is used. However, a simple process is desired for use as a practical method. Further, the method (e) has a drawback that the processing speed is slow. In (a) and (d), when superplastically deformed at 525 ° C, a liquid phase is partially generated in the 2124 Al matrix, so defects such as cavities are more likely to occur, and the mechanical properties after superplastic deformation are worse than before deformation. It is also possible to do it.
また、(c)の場合、固相状態で超塑性が発現するがウイ
スカよりも強化作用が小さい粒子を用いている。そし
て、(b)の場合、７４７５Ａｌ合金の箔にウイスカを塗
布し拡散接合法により複合材料を造っており、その機械
的性質の安定性に問題があると考えられる。Further, in the case of (c), particles that exhibit superplasticity in the solid state but have a smaller strengthening action than whiskers are used. In the case of (b), whiskers are applied to the foil of 7475 Al alloy and the composite material is manufactured by the diffusion bonding method, and it is considered that there is a problem in the stability of the mechanical properties.
（作 用） 本発明による方法において、４４μｍ以下の微細な粒径
の６０００系又は７０００系アルミニウム合金粉末と窒
化ケイ素ウイスカとを均一に混合し、加圧焼結させると
第１図のようにＡｌマトリックス中にウイスカが均一に
分散した複合材料が得られる。そして、再圧縮と熱間押
出し加工を加えることにより、マトリックスとウイスカ
との界面の接着強度が向上し、しかも、元々微細なＡｌ
合金中の結晶粒に対し、ウイスカが加熱によるその成長
を抑制する作用をなし、熱間加工後にも結晶粒径は微細
なままに保たれる。これにより、超塑性変形が可能とな
る。本製造法は従来の方法とは異なり加工熱処理法を加
えていないので、極めて簡単な製造プロセスである。(Operation) In the method according to the present invention, a 6000 series or 7000 series aluminum alloy powder having a fine particle size of 44 μm or less and silicon nitride whiskers are uniformly mixed and pressure-sintered to obtain Al as shown in FIG. A composite material is obtained in which whiskers are uniformly dispersed in the matrix. Then, by adding recompression and hot extrusion, the adhesive strength at the interface between the matrix and the whiskers is improved, and the Al
The whiskers have an effect of suppressing the growth of the crystal grains in the alloy due to heating, and the crystal grain size is kept fine even after hot working. This enables superplastic deformation. Unlike the conventional method, this manufacturing method does not include a thermomechanical treatment method, and thus is an extremely simple manufacturing process.
また、６０００系あるいは７０００系Ａｌ合金マトリッ
クスの場合、超塑性が発現する温度域でもマトリックス
は固相状態を保っており、超塑性変形中での欠陥の発生
は極めて少なく、変形後の機械的性質の劣化はない。Further, in the case of the 6000 series or 7000 series Al alloy matrix, the matrix remains in the solid phase state even in the temperature range where superplasticity is exhibited, the occurrence of defects during superplastic deformation is extremely small, and the mechanical properties after deformation are high. There is no deterioration.
（実施例１） 窒化ケイ素ウイスカと粒度が４４μｍ以下の６０６１Ａ
ｌ合金粉末とをウイスカ体積含有率が２０％になるよう
に量り、エタノール中で超音波振動を付加し両者を均一
に混合する。乾燥させた混合粉末をホットプレスを用い
真空中で、温度６００℃、圧力２００ＭＰａに２０分間
保持し加圧焼結させる。その後、温度６００℃、圧力４
００ＭＰa で大気中にて２０分間再圧縮を加える。これ
をアルミニウム管に入れ、温度５００℃、押出し比４４
で静的に熱間押出し加工し、更に、Ｔ６熱処理（５００
℃で３時間保持後水冷し、１９０℃で１６時間保持後空
冷）を行い析出強化により材質の向上を図る。(Example 1) Silicon nitride whiskers and 6061A having a particle size of 44 μm or less
1 alloy powder is weighed so that the whisker volume content is 20%, and ultrasonic vibration is applied in ethanol to uniformly mix both. The dried mixed powder is pressure-sintered by using a hot press in a vacuum at a temperature of 600 ° C. and a pressure of 200 MPa for 20 minutes. After that, temperature 600 ℃, pressure 4
Recompress at 00 MPa in air for 20 minutes. Put this in an aluminum tube, temperature 500 ℃, extrusion ratio 44
Statically hot-extruded with a T6 heat treatment (500
After being kept at 3 ° C for 3 hours, water-cooled, and at 190 ° C for 16 hours, air-cooled) to improve the material by precipitation strengthening.
（実施例２） 窒化ケイ素ウイスカと粒度４４μｍ以下の７０６４Ａｌ
合金粉末とをウイスカ体積含有率が２０％となるように
量り、同様な方法と条件で混合−加圧焼結−再圧縮−熱
間押出し加工−Ｔ６熱処理を行い、窒化ケイ素ウイスカ
強化７０６４Ａｌ合金複合材料を造る。(Example 2) Silicon nitride whiskers and 7064 Al having a particle size of 44 μm or less
The alloy powder and the whisker volume content are weighed to be 20%, mixed under the same method and conditions-pressurized sintering-recompression-hot extrusion-T6 heat treatment to perform silicon nitride whisker reinforced 7064 Al alloy composite. Make material.
（発明の効果） 以上述べた本発明において、窒化ケイ素ウイスカ強化６
０６１Ａｌ合金複合材料を５４５℃において引張試験を
行った結果０．１５（１／秒）の歪速度で２５０％の全
伸びを示した。(Effects of the Invention) In the present invention described above, silicon nitride whisker reinforced 6
As a result of conducting a tensile test on the 061 Al alloy composite material at 545 ° C., a total elongation of 250% was shown at a strain rate of 0.15 (1 / sec).
また、窒化ケイ素ウイスカ強化７０６４Ａｌ合金複合材
料は５２５℃の温度で、０．１７（１／秒）の歪速度で
引張試験を行うと全伸びは２００％に達し、超塑性の特
徴を示した。これらの結果を第２図と第３図に示す。Further, when the silicon nitride whisker reinforced 7064 Al alloy composite material was subjected to a tensile test at a strain rate of 0.17 (1 / sec) at a temperature of 525 ° C., the total elongation reached 200%, which was a characteristic of superplasticity. The results are shown in FIGS. 2 and 3.
第１図は窒化ケイ素ウイスカ強化Ａｌ合金複合材料の金
属組織を示す顕微鏡写真である。写真の黒色の部分は窒
化ケイ素ウイスカであり白色の部分は６０６１Ａｌ合金
マトリックスである。 第２図は窒化ケイ素ウイス強化６０６１Ａｌ合金複合材
料を５４５℃を引張変形させた時の全伸びと歪速度との
関係を示す。 第３図は窒化ケイ素ウイスカ強化７０６４Ａｌ合金複合
材料を５２５℃で引張変形させた時の全伸びと歪速度と
の関係を示す。FIG. 1 is a photomicrograph showing the metal structure of a silicon nitride whisker reinforced Al alloy composite material. The black part of the photograph is the silicon nitride whiskers and the white part is the 6061 Al alloy matrix. FIG. 2 shows the relationship between the total elongation and the strain rate when the silicon nitride whisker reinforced 6061 Al alloy composite material is tensile deformed at 545 ° C. FIG. 3 shows the relationship between the total elongation and the strain rate when the silicon nitride whisker reinforced 7064 Al alloy composite material is tensile deformed at 525 ° C.
Claims (1)
度４４μｍ以下の６０００系又は７０００系アルミニウ
ム合金粉末とをエタノールのごとき有機溶媒中に入れ超
音波振動を加え均一に混合後、溶媒を蒸発により除去し
た混合粉末を真空中にて加圧焼結し、その後再圧縮と熱
間押出し加工を加え、更に熱処理により時効硬化するこ
とを特徴とする超塑性窒化ケイ素ウイスカ強化アルミニ
ウム合金の製造方法。1. An α-type or β-type silicon nitride whisker and a 6000-series or 7000-series aluminum alloy powder having a particle size of 44 μm or less are placed in an organic solvent such as ethanol, ultrasonically vibrated and uniformly mixed, and then the solvent is evaporated. A method for producing a superplastic silicon nitride whisker reinforced aluminum alloy, which comprises subjecting the mixed powder removed by means of pressure sintering in a vacuum, then subjecting it to recompression, hot extrusion, and age hardening by heat treatment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1244767A JPH0635631B2 (en) | 1989-09-20 | 1989-09-20 | Manufacturing method of superplastic silicon nitride whisker reinforced aluminum alloy composite material. |
| US07/582,337 US5051231A (en) | 1989-09-20 | 1990-09-14 | Method for fabrication of superplastic composite material having metallic aluminum reinforced with silicon nitride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1244767A JPH0635631B2 (en) | 1989-09-20 | 1989-09-20 | Manufacturing method of superplastic silicon nitride whisker reinforced aluminum alloy composite material. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03107433A JPH03107433A (en) | 1991-05-07 |
| JPH0635631B2 true JPH0635631B2 (en) | 1994-05-11 |
Family
ID=17123601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1244767A Expired - Lifetime JPH0635631B2 (en) | 1989-09-20 | 1989-09-20 | Manufacturing method of superplastic silicon nitride whisker reinforced aluminum alloy composite material. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635631B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2569418B2 (en) * | 1992-12-01 | 1997-01-08 | 工業技術院長 | Manufacturing method of superplastic aluminum nitride particle reinforced aluminum alloy composite material by hot extrusion and hot rolling and its processing method |
| AT504924A1 (en) * | 2007-03-09 | 2008-09-15 | Capital Technology Beteiligung | VEHICLE COMPONENT |
| CN104480413B (en) * | 2014-11-21 | 2016-12-07 | 北京科技大学 | A kind of preparation method of isotropic Aluminum-Matrix Composites with Short Fiber |
| WO2023101727A1 (en) * | 2021-12-03 | 2023-06-08 | Gkn Sinter Metals, Llc | Precipitation hardening powder metal composition |
-
1989
- 1989-09-20 JP JP1244767A patent/JPH0635631B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03107433A (en) | 1991-05-07 |
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