JPH04159081A - Reinforcing method for particle dispersion type metal group composite material - Google Patents
Reinforcing method for particle dispersion type metal group composite materialInfo
- Publication number
- JPH04159081A JPH04159081A JP28459490A JP28459490A JPH04159081A JP H04159081 A JPH04159081 A JP H04159081A JP 28459490 A JP28459490 A JP 28459490A JP 28459490 A JP28459490 A JP 28459490A JP H04159081 A JPH04159081 A JP H04159081A
- Authority
- JP
- Japan
- Prior art keywords
- composite material
- particle dispersion
- dispersion type
- type metal
- metal
- 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
- 239000002245 particle Substances 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000002184 metal Substances 0.000 title abstract description 9
- 229910052751 metal Inorganic materials 0.000 title abstract description 9
- 239000002131 composite material Substances 0.000 title abstract 4
- 239000006185 dispersion Substances 0.000 title abstract 4
- 239000000463 material Substances 0.000 claims abstract description 24
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005480 shot peening Methods 0.000 claims abstract description 12
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims abstract description 7
- 239000011156 metal matrix composite Substances 0.000 claims description 11
- 239000010953 base metal Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000009661 fatigue test Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、粒子分散型金属基複合材料の疲労強度の強化
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for increasing the fatigue strength of a particle-dispersed metal matrix composite material.
小さな鋼球ショットを圧縮空気又は遠心力て金属表面に
たたきつけ、表面の応力の均一化を行うことは、ショッ
トピーニング加工として知られている。実開昭６１−１
６３７０６公報には、懸架装置用ロットに圧縮残留応力
か、：１５Ｋｇ−ｆｏａｍ２以上となるようにショット
ピーニング加工を施して金属材料製ロットの疲労強度を
向上させたものか記載されている。BACKGROUND ART The process of striking a metal surface with small steel ball shots using compressed air or centrifugal force to equalize stress on the surface is known as shot peening. Jitsukai Showa 61-1
Publication No. 63706 describes that the fatigue strength of a metal material lot is improved by subjecting the suspension system lot to a compressive residual stress or by shot peening to have a compressive residual stress of 15 kg-foam2 or more.
また、実開昭６３−１６４００２公報には、アルミ合金
製ホイールにショットピーニング加工を施して耐久寿命
を増大させたものか記載されている。Further, Japanese Utility Model Application Publication No. 164002/1983 describes that an aluminum alloy wheel is subjected to shot peening to increase its durability.
一方、炭化珪素（ＳｉＣ）、酸化アルミニウム（Ａ１２
０゜）等の粒子を粉末冶金法等で母材金属に分散配置さ
せた粒子分散型の金属基複合材料は、母材金属に比較し
て静的機械強度、疲労強度か大幅に向上することか知ら
れている。On the other hand, silicon carbide (SiC), aluminum oxide (A12
Particle-dispersed metal matrix composite materials, in which particles such as 0°) are dispersed in a base metal using powder metallurgy, have significantly improved static mechanical strength and fatigue strength compared to the base metal. or known.
（発明が解決しようとする課題）
ところか、前記の粒子分散型の金属基複合材料は、この
材料を加工した製品の表面に亀裂か発生し、その亀裂発
生度合か不規則てあって製品強度の安定性に欠ける問題
かある。これは、素材製造時における粒子の分散配置の
不均一に起因するものと推定される。(Problems to be Solved by the Invention) However, with the above-mentioned particle-dispersed metal matrix composite material, cracks occur on the surface of products processed from this material, and the degree of cracking is irregular, resulting in poor product strength. There is a problem with the lack of stability. This is presumed to be due to non-uniform distribution of particles during the production of the material.
本発明は、粒子分散型金属基複合材料の加工表面に粒子
を高密度に且つ均一に再分散させて亀裂発生を防止する
と共に、母材金属に所定の圧縮残留応力を付与して疲労
寿命の向上を図ることを目的としだものである。The present invention prevents cracking by re-dispersing particles uniformly and densely on the processed surface of a particle-dispersed metal matrix composite material, and also imparts a predetermined compressive residual stress to the base metal to extend fatigue life. The purpose is to improve the quality of life.
〔課題を解決するための手段及び作用〕本発明は、炭化
珪素等を母材金属に分散配置させた粒子分散型の金属基
複合材料の表面に、ショット粒ｇ５０〜２５０ ＡＬｍ
のガラスビーズを用い、アークハイト値を０．１８以上
とするショトピーニングを施し、母材金属に残留圧縮応
力５０〜２００ＭＰａを付与する粒子分散型金属基複合
材料の強化法である。[Means and effects for solving the problems] The present invention provides shot grains g50 to 250 ALm on the surface of a particle-dispersed metal matrix composite material in which silicon carbide or the like is dispersed in a base metal.
This is a method of strengthening a particle-dispersed metal matrix composite material by applying shot peening to an arc height value of 0.18 or more using glass beads, and imparting a residual compressive stress of 50 to 200 MPa to the base metal.
前記の条件てのショトピーニングにより、粒子分散型金
属基複合材料の表面に炭化珪素等の強化粒子か高密度に
且つ均一に再分散されて表面からの亀裂発生か防止され
、母材金属に所定範囲の圧縮残留応力か付与されること
で疲労寿命か向上する。By shot peening under the above conditions, reinforcing particles such as silicon carbide are re-dispersed densely and uniformly on the surface of the particle-dispersed metal matrix composite material, preventing cracks from occurring from the surface, and forming a predetermined structure in the base metal. Fatigue life is improved by applying a range of compressive residual stress.
〔実施例〕
母材金属としてアルミニウム合金、強化粒子として炭化
珪素を用いた粒子分散型金属基複合材料の疲労強度特性
の安定化について説明する。[Example] Stabilization of fatigue strength characteristics of a particle-dispersed metal matrix composite material using an aluminum alloy as a base metal and silicon carbide as reinforcing particles will be described.
直径３〜５゛ＪＬｍの炭化珪素の粉末粒子を体積率で約
２０％、アルミニウム合金粉末（Ｊ Ｉ ５Ａ２０２４
）と混合して焼結し、この素材から、第１図に示すよう
に、直径６■厘の曲げ疲労試験片１を作成した。Approximately 20% by volume of silicon carbide powder particles with a diameter of 3 to 5 JLm, aluminum alloy powder (J I 5A2024
) and sintered, and from this material, a bending fatigue test piece 1 having a diameter of 6 cm was prepared as shown in FIG.
この試験片１をターンテーブル２に取付け、ターンチー
フル２を２０ｒｐ■て回転させなから、試験片工の平行
部ＩＡに空気明射式ノズル３からガラスビーズ４を吹き
付け、次の条件でショトピーニングを施した。This test piece 1 is mounted on a turntable 2, and the turntable 2 is rotated at 20 rpm. Glass beads 4 are sprayed from an air spray nozzle 3 onto the parallel part IA of the test piece under the following conditions. Peening was applied.
ガラスビーズ径・１７７〜２５０ ＡＬ■ガハレーシ
：３００％
アークハイト ・０．３５Ｎ
時 間 ： １５ ｓｅｃ。Glass bead diameter: 177-250 AL
:300% Arc height ・0.35N Time: 15 sec.
距 ｍ ：１５０■ｌ
このショトピーニングを施した試験片と無処理の試験片
の回転曲げ疲労試験の結果を第３１’ｌに示ず。Distance m: 150 l The results of the rotating bending fatigue test of the short peened test piece and the untreated test piece are not shown in No. 31'l.
第３図は、縦軸に応力振幅ＭＰａを、横軸に繰り返し数
Ｎを示し、△はショトピーニングを施した試験片の試験
結果、○は無処理の試験片の試験結果を示す。In FIG. 3, the vertical axis shows the stress amplitude MPa, and the horizontal axis shows the number of repetitions N, where △ shows the test results of the shot-peened test piece, and ○ shows the test results of the untreated test piece.
この図にみられるように、ショトピーニングを施した場
合には、＋０５サイクル付近で無処理の場合に比へて約
４０ＭＰａ、】０７サイクル付近ては約１０ＭＰａ疲労
強度か向上しており、また、実線の←て示すように、バ
ラツキか少くなっている。これに対して無処理の場合は
、破線のりで示すようにバラツキか大きくなっている。As seen in this figure, when short peening was applied, the fatigue strength increased by about 40 MPa compared to the untreated case around the +05 cycle, and by about 10 MPa around the +07 cycle, and As shown by the solid line ←, the variation is decreasing. On the other hand, in the case of no treatment, the variation is large as shown by the broken line.
これは、無処理の場合は、第２図（Ｂ’）示すように、
試験片１の表面において、母材Ｂ中にＳｉＣ粒子粒子率
均一に配置しており、破断は材料の表面から起きるので
、疲労強度特性のバラツキか大きいか、ショトピーニン
グを施した場合には、第２図（Ａ）に示すように 試験
片ＩＡの表面において ＳｉＣ粒子粒子率一にしかも高
′ＰＦ：度に再配置され、これにより疲労強度特性か安
定するものど考られる。In the case of no treatment, as shown in Figure 2 (B'),
On the surface of test piece 1, the SiC particles are uniformly distributed in the base material B, and the fracture occurs from the surface of the material. As shown in FIG. 2(A), on the surface of the test piece IA, the SiC particles are rearranged to a uniform particle ratio and a high PF, which is thought to stabilize the fatigue strength properties.
第４図に応力振幅３０［）ＭＰａにおける残留応力と疲
労寿命との関係を示す。残留応力は、母材の納品面をＸ
線により測定した。FIG. 4 shows the relationship between residual stress and fatigue life at a stress amplitude of 30 [) MPa. Residual stress is calculated when the delivery surface of the base material is
Measured by line.
ショトピーニングを施した場合には、表面に残留応力か
附加されて疲労寿命か向上していることか確認てきた。It has been confirmed that when short peening is applied, residual stress is added to the surface and fatigue life is improved.
ショトピーニング（又はシヨ・ントフラスト）は、圧縮
空気に限らず、遠心力て粒子を吹き付けるようにしても
よい。Shot peening (or shot peening) is not limited to compressed air, and may also involve spraying particles using centrifugal force.
強化粒子は、前記のＳｉＣ，Ａｌ２ｏｚの粒子の外、Ｓ
ｌ：ｌＮＪ、 ５ｉ０２等のセラミック粒子か使用てき
る。In addition to the aforementioned SiC and Al2oz particles, the reinforcing particles include S
Ceramic particles such as l: lNJ, 5i02, etc. can be used.
ショトピーニングの条件は、ショット粒径５０〜２５０
鉢曹のガラスビーズを使用し、アークハイト値を０．１
８以上とし、残留圧縮応力を５０〜２００ＭＰａとする
ことかてきる。The conditions for shot peening are shot particle size of 50 to 250.
Use potted glass beads and set the arc height value to 0.1.
8 or more, and the residual compressive stress can be set to 50 to 200 MPa.
本発明は、粒子分散型金属基複合材料の表面に炭化珪素
等の強化粒子を高密度に且つ均一に再分散させて亀裂発
生を防止し、製品強度の安定性を増すと共に、母材金属
に所定範囲の圧縮残留応力か付与されることて疲労寿命
か向上する効果か有る。The present invention prevents the occurrence of cracks by re-dispersing reinforcing particles such as silicon carbide on the surface of a particle-dispersed metal matrix composite material at high density and uniformly, thereby increasing the stability of product strength and improving the strength of the base metal. Applying compressive residual stress within a predetermined range has the effect of improving fatigue life.
第１図はショトピーニングの説明図、第２図（Ａ）はシ
ョトピーニングを施した材料表面部の模型図、第２図（
Ｂ）は無処理材料表面部の模型図、第３図はショトピー
ニングを施した場合と無処理の場合の回転曲げ疲労試験
の結果を示す図、第４図は残留応力と寿命との関係を示
す図である。
１、疲労試験片 ２：ターンチーフル３、ノズル
４：ガラスヒーズＡ：炭化珪素粒子 Ｂ、母
材Figure 1 is an explanatory diagram of short peening, Figure 2 (A) is a model diagram of the surface of the material subjected to short peening, Figure 2 (
B) is a model diagram of the untreated material surface, Figure 3 is a diagram showing the results of a rotating bending fatigue test with and without shot peening, and Figure 4 is a diagram showing the relationship between residual stress and life. FIG. 1. Fatigue test piece 2: Turntable 3. Nozzle
4: Glass heat A: Silicon carbide particles B: Base material
Claims (1)
属基複合材料の表面に、ショット粒径５０〜２５０μｍ
のガラスビーズを用い、アークハイト値を０．１Ｎ以上
とするショトピーニングを施し、母材金属に残留圧縮応
力５０〜２００ＭＰａを付与すことを特徴とする粒子分
散型金属基複合材料の強化法。A shot particle size of 50 to 250 μm is applied to the surface of a particle-dispersed metal matrix composite material in which silicon carbide etc. are dispersed in a base metal.
A method for reinforcing a particle-dispersed metal matrix composite material, which comprises applying shot peening to an arc height value of 0.1 N or more using glass beads, thereby imparting a residual compressive stress of 50 to 200 MPa to the base metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28459490A JPH04159081A (en) | 1990-10-23 | 1990-10-23 | Reinforcing method for particle dispersion type metal group composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28459490A JPH04159081A (en) | 1990-10-23 | 1990-10-23 | Reinforcing method for particle dispersion type metal group composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04159081A true JPH04159081A (en) | 1992-06-02 |
Family
ID=17680480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28459490A Pending JPH04159081A (en) | 1990-10-23 | 1990-10-23 | Reinforcing method for particle dispersion type metal group composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04159081A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0556788A2 (en) * | 1992-02-20 | 1993-08-25 | Mitsubishi Materials Corporation | Hard alloy |
| EP0638416A1 (en) * | 1993-08-12 | 1995-02-15 | Formica Technology Inc. | Improved shot peened press plate and method for producing same |
| US6655026B1 (en) * | 1999-01-28 | 2003-12-02 | Honda Giken Kogyo Kabushiki Kaisha | Production process for connecting rod for internal combustion engine |
-
1990
- 1990-10-23 JP JP28459490A patent/JPH04159081A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0556788A2 (en) * | 1992-02-20 | 1993-08-25 | Mitsubishi Materials Corporation | Hard alloy |
| EP0638416A1 (en) * | 1993-08-12 | 1995-02-15 | Formica Technology Inc. | Improved shot peened press plate and method for producing same |
| US6655026B1 (en) * | 1999-01-28 | 2003-12-02 | Honda Giken Kogyo Kabushiki Kaisha | Production process for connecting rod for internal combustion engine |
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