JPS62265174A - Mechanical structural member - Google Patents
Mechanical structural memberInfo
- Publication number
- JPS62265174A JPS62265174A JP61106870A JP10687086A JPS62265174A JP S62265174 A JPS62265174 A JP S62265174A JP 61106870 A JP61106870 A JP 61106870A JP 10687086 A JP10687086 A JP 10687086A JP S62265174 A JPS62265174 A JP S62265174A
- Authority
- JP
- Japan
- Prior art keywords
- silicon nitride
- nitride sintered
- sintered body
- temperature
- thermal conductivity
- 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.)
- Granted
Links
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 29
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 29
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は窒化珪素焼結体により構成した機械構造部材に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanical structural member made of a sintered silicon nitride body.
（従来の技術）
従来、ターボチャージャーロータ。エンジンのビスｉ〜
ンキャツブ、シリンダライナー、ガスタービンロータ等
の機械構造部材にＺｒ Ｏｚ 。(Conventional technology) Conventionally, turbocharger rotor. engine screw i
ZrOz for mechanical structural parts such as engine covers, cylinder liners, and gas turbine rotors.
３ｉ ３ＮａＷの耐熱性セラミックスを使用し、稼動温
度を上昇して熱効率を上げる試みがなされてきた。Attempts have been made to use 3i 3NaW heat-resistant ceramics to increase operating temperatures and increase thermal efficiency.
（発明が解決しようとする問題点）
しかしながら、上記機械構造部材の材料として７’ｒ
０２を使用した場合は、Ｚｒ ０２は熱伝導率が０．０
０７ｃａｌ ／ｃｍ・ｓｅｃ −℃と低く断熱性に浸れ
るものの、熱膨張率が高いので耐熱衝撃性が低く、また
比重が高く重い欠点があった。(Problem to be solved by the invention) However, as the material of the mechanical structural member, 7'r
When Zr 02 is used, the thermal conductivity of Zr 02 is 0.0.
Although it has a low thermal insulation property of 0.07 cal/cm·sec -°C, it has a high coefficient of thermal expansion, so it has low thermal shock resistance, and has a high specific gravity and is heavy.
また、従来高温構造材料として使用されている３ｉ ３
Ｎ＜は緻密かつ高強度であり、熱膨張率も低いため、Ｚ
ｒ ０２と比較して耐熱衝撃性には優しルが熱伝導率は
約０．０７ｃａｌ／ ｃｍ −ｓｅｃ −℃と高い為、
断熱性に劣る欠点があった。そのため、例えばターボチ
ャージャーロータやガスタービンロ′−タとして３ｉ
３Ｎ＋を使用した場合は、今風部材との結合部の温度が
上昇し易く、高い稼動温度を１ｑる事が困難であったり
、シリンダライナーとして使用した場合は断熱効果が悪
い分だけ熱損失が増大する欠点があった。In addition, 3i3, which has been conventionally used as a high-temperature structural material,
N< is dense, has high strength, and has a low coefficient of thermal expansion, so Z
Compared to r 02, it has better thermal shock resistance, and its thermal conductivity is higher at approximately 0.07 cal/cm -sec -℃.
It had the disadvantage of poor insulation properties. Therefore, for example, 3i can be used as a turbocharger rotor or gas turbine rotor.
When using 3N+, the temperature at the joint with modern components tends to rise, making it difficult to reduce the high operating temperature to 1q, and when used as a cylinder liner, the heat loss increases due to the poor insulation effect. There was a drawback.
本発明の目的は上述した不具合を解消して、従来の窒化
珪素焼結体を用いた機ｌＦ！構造部材より高温での？！
肋性能を向上することのできる機械構造部材を提供しよ
うとするものである。The purpose of the present invention is to solve the above-mentioned problems and to improve the performance of a conventional silicon nitride sintered body. At higher temperatures than structural members? !
The present invention aims to provide a mechanical structural member that can improve structural performance.
（問題点を解決するための手段）
本発明の機械構造部材は、熱伝導率が０．０３０ｃａｔ
／Ｃ１１ｌ−３ｅｃ ・℃未満である高密度窒化珪素
焼結体を用いたことを特徴とするものである。(Means for solving the problem) The mechanical structural member of the present invention has a thermal conductivity of 0.030 cat.
It is characterized by using a high-density silicon nitride sintered body having a temperature of less than /C11l-3ec·°C.
（作 用）
上述した構成において、熱伝導率が０．０３０Ｃａ ｌ
／ｃｌ−３ｅｃ ・℃未満の窒化珪素焼結体を使用して
機械構造部材を構成すると、特に稼動温度が高く、稼動
効率が良好な部材を得ることができる。すなわち本発明
は、高密度で高温強度等の機械的性質が使用条件に耐え
ろる任意の窒化珪素焼結体のうち熱伝導率が０．０３０
ｃａｌ ／ｃｍ−ｓｅｃ ・℃未満の窒化珪素焼結体を
使用すれば、良好なａ温稼動率を達成できる機械構造部
材を得ることができることを見出したことによる。なお
、ｌ！４温強度等の他の性質は直接本発明の機械構造部
材に関係するものではないが、もちろんこれらの性質も
良好な方が良いことは言うまでもない。(Function) In the above configuration, the thermal conductivity is 0.030 Cal.
When a mechanical structural member is constructed using a silicon nitride sintered body having a temperature of less than /cl-3ec.degree. C., a member with particularly high operating temperature and good operating efficiency can be obtained. In other words, the present invention provides a silicon nitride sintered body having a thermal conductivity of 0.030 among any silicon nitride sintered bodies that have high density and mechanical properties such as high-temperature strength that can withstand the usage conditions.
This is because it has been found that by using a silicon nitride sintered body having a temperature of less than cal/cm-sec .degree. In addition, l! Although other properties such as four-temperature strength are not directly related to the mechanical structural member of the present invention, it goes without saying that the better these properties are, the better.
（実施例）
本発明で使用する熱伝導率が０．０３０ｃａｌ ／ｃｍ
・ｓｅｃ ・℃未満の窒化珪素焼結体としては、例えば
本願出願人による特願昭６０−２０４９８５に明らかな
ようにＭＯ、Ｓｒ 、ＣｅおよびＡ１の化合物を、Ｍ（
１０に換算して０．５〜５ｆｆｉｆｆｉ％、ＳｒＯに換
算して０．５〜５重量％、０１３０２に換算して １〜
１０重量％およびＡｌ２Ｏ３゛に換算して１〜２帽１％
を含み残部が窒化珪素よりなる窒化珪素焼結体や、ある
いは特願昭６０−２０４９８６に明らかなようにＳｒ。(Example) The thermal conductivity used in the present invention is 0.030 cal/cm
As a silicon nitride sintered body having a temperature of less than ・sec ・℃, for example, as disclosed in Japanese Patent Application No. 60-204985 filed by the applicant of the present application, compounds of MO, Sr, Ce and A1 can be used.
0.5-5ffiffi% in terms of 10, 0.5-5% by weight in terms of SrO, 1-5% in terms of 01302
10% by weight and 1-2% 1% in terms of Al2O3
A silicon nitride sintered body containing silicon nitride with the remainder being silicon nitride, or Sr as disclosed in Japanese Patent Application No. 60-204986.
Ｍｉｌｌ 、 Ｃｅ 、 ＺｒおよびＡＩの化合物を、
ＳｒＯに換算して０．１〜１８重量％、ＭＯＯに換算し
て０．２〜２５重謹気量Ｃｅｎ２に換算しＴ Ｏ，１〜
２０ｆｆｌ母％、ｚ「０２に換算して０．１〜１５重盪
％およびＡｌ２Ｏ３に換算して１〜２幅１％含み残部が
窒化珪素よりなる窒化珪素焼結体が、その高温強度が高
い点で好適である。しかしながら本発明は上述した窒化
珪素焼結体に限定されるものでないことは明らかであり
、機械的性質が使用条件に耐えつるとともに熱伝導率が
０．０３０ｃａｌ ／ｃｍ −ｓｅｃ −℃未満の窒化
珪素焼結体であればすべてのものが使用できることは言
うまでもない。Compounds of Mill, Ce, Zr and AI,
0.1 to 18% by weight in terms of SrO, 0.2 to 25 in terms of MOO, T O,1 to
A silicon nitride sintered body containing 20 ffl mother%, 0.1 to 15 wt% in terms of 02 and 1 to 2 width in terms of Al2O3, with the remainder being silicon nitride, has high high temperature strength. However, it is clear that the present invention is not limited to the above-mentioned silicon nitride sintered body, and it is preferable that the present invention is not limited to the above-mentioned silicon nitride sintered body. It goes without saying that any silicon nitride sintered body having a temperature below -°C can be used.
以下、実際の例について説明する。An actual example will be explained below.
哀ｊ」ＬＬ
本発明の実施例である熱伝導率０．０３０ｃａｌ ／Ｃ
Ｉ・ｓｅｃ ・℃未満の窒化珪素焼結体を用いたチップ
径６０ｍｍのターボチャージャーローターを使い、以下
の実験を行なった。LL Thermal conductivity is an example of the present invention: 0.030 cal/C
The following experiment was conducted using a turbocharger rotor with a tip diameter of 60 mm and made of a silicon nitride sintered body with a temperature of less than I.sec.°C.
ローターを金属製の軸に圧入法により結合後、予め内側
にビスを突出させローターが回転出来ないようにしたハ
ウジングに装着し、外部から上記軸のジャーナル部へ熱
電対を挿入し、ホットスピンテスターにとりつけた。次
に、ホットスピンテスターのバーナーからガス流８８０
℃の条件で１０分間高温ガス流をローターに送り、加熱
した。その侵、高温ガス流と軸冷却オイルの循環を同時
に停止してジャーナル部の温度上昇を測定した。更にこ
の条件での運転・停止を１０回くり返した後でローター
をとり出し、軸への冷却オイル焼きつきの程度を確認し
た。また比較例として、熱伝導率が０．０３０ｃａｌ
／ａｅ −ｓｅｃ ・℃以上の窒化珪素焼結体を用いた
ローターに関しても同様の実験を行なった。結果を第１
表に示す。After the rotor is connected to the metal shaft by press-fitting, it is installed in a housing that has screws protruding from the inside to prevent the rotor from rotating.A thermocouple is inserted from the outside into the journal of the shaft, and a hot spin tester is used. I was attached to it. Next, the gas flow 880 from the burner of the hot spin tester
The rotor was heated by sending a hot gas stream through the rotor for 10 minutes at .degree. In response to this, we simultaneously stopped the flow of high-temperature gas and the circulation of shaft cooling oil and measured the temperature rise in the journal. After repeating operation and stopping under these conditions 10 times, the rotor was taken out and the extent of the cooling oil seizing on the shaft was checked. As a comparative example, the thermal conductivity is 0.030 cal.
A similar experiment was also conducted regarding a rotor using a silicon nitride sintered body having a temperature of /ae -sec .degree. C. or higher. Results first
Shown in the table.
なお、各窒化珪素焼結体の熱伝導率は、レーザー法熱定
数測定ＩＩ！を使用してレーザーフラッシュ法により測
定した。試料形状は直径１０１１１１． Ｉ！３１さ３
ａ＋ｍとし、片面をカーボンスプレーによりコーティン
グし、裏側への熱雷対接着には銀ペーストを使用した。The thermal conductivity of each silicon nitride sintered body was determined by laser method thermal constant measurement II! It was measured by the laser flash method using The sample shape has a diameter of 101111. I! 31sa3
A+M, one side was coated with carbon spray, and silver paste was used for thermal lightning bonding to the back side.
（Ｘ） レーザーフラッシュ法による。(X) By laser flash method.
第１表に明らかなように、熱伝導率０．０３０ｃａｌ／
０１− ｓｅｃ ・℃未満の窒化珪素焼結体を用いた
Ｏ−ターは、エンジン急停止時の軸ジヤーナル部の温度
上界が抑制され、その繰り返しによる冷却オイルの軸へ
の焼きつきも軽減されることがわかった。As is clear from Table 1, the thermal conductivity is 0.030 cal/
The O-tar, which uses a silicon nitride sintered body with a temperature of less than 01-sec ℃, suppresses the upper temperature limit of the shaft journal part when the engine suddenly stops, and reduces the burning of cooling oil on the shaft due to repeated cycles. It turns out that
実施例２
排気ω２８８ｃｃ、単気筒副燃焼空式ディーゼルエンジ
ンに、第２表に示すように本発明の実施例である熱伝導
率が０．０３０ｃａｌ １０１− Ｓｅｅ ・℃未満の
窒化珪素焼結体を用いたシリンダライナーとシリンダヘ
ッド、ピストンヘッドを取りつけた場合（Ｎｏ、１〜４
）及び、同じディーゼルエンジンに比較例として熱伝導
率が０．０３０ｃａｌ ／ａａ −ｓｅｃ・℃以上の窒
化珪素焼結体を用いたシリンダライナーとシリンダヘッ
ド、ピストンヘッドを取りつけた場合（Ｎｏ、５）につ
いて、２４００ｒｐｍ＋全負荷の運転時において冷却水
の入口、出口温度を測定し冷却熱量を求め、燃料消費量
から算出される供給熱量に対する冷却水損失割合を算出
し、第２表に示した。Example 2 A silicon nitride sintered body having a thermal conductivity of less than 0.030 cal 101- See ·°C, which is an example of the present invention, as shown in Table 2, was used in a single-cylinder sub-combustion pneumatic diesel engine with an exhaust of ω 288 cc. When the used cylinder liner, cylinder head, and piston head are installed (No. 1 to 4)
) and a case where a cylinder liner, cylinder head, and piston head using a silicon nitride sintered body with a thermal conductivity of 0.030 cal/aa-sec・℃ or higher is installed as a comparative example in the same diesel engine (No. 5). , during operation at 2400 rpm + full load, the inlet and outlet temperatures of the cooling water were measured to determine the amount of cooling heat, and the ratio of cooling water loss to the amount of heat supplied calculated from the fuel consumption was calculated and shown in Table 2.
第２表
（１）レーザーフラッシュ法による （２）ＪＩＳ
Ｒ−１６０１による第２表から明らかなように、熱
伝導率が０．０３０ｃａｌ ／ ｃｍ −ｓｅｃ ・℃
未満の窒化珪素焼結体を用いた本発明のシリンダライナ
ーとシリンダヘッド。Table 2 (1) By laser flash method (2) JIS
As is clear from Table 2 according to R-1601, the thermal conductivity is 0.030 cal/cm-sec・℃
The cylinder liner and cylinder head of the present invention use a silicon nitride sintered body of less than or equal to 100%.
ビス］−ンヘッドは、比較例に比べてディーゼルエンジ
ンの冷却水損失割合を低減させることがわかった。The engine head was found to reduce the cooling water loss rate of the diesel engine compared to the comparative example.
また、室温強度が低いと使用時にクラックが発生し、強
度の高い窒化珪素焼結体を使用することが望ましいこと
がわかった。これは、空温強度の低い窒化珪素では一般
に高温強度も低く、かつ耐熱衝撃性に劣るためと考えら
れる。In addition, it was found that if the room temperature strength is low, cracks will occur during use, so it is desirable to use a silicon nitride sintered body with high strength. This is thought to be because silicon nitride, which has low air temperature strength, generally has low high temperature strength and poor thermal shock resistance.
実施例３
実施例２の第２表に示すシリンダーＮｏ、１゜２．５に
おいてシリンダーブロックとシリンダーヘッドの間から
挿入した熱電対をシリンダーライナー内表面に加工した
溝に耐熱接着剤で接着した。Example 3 In cylinder No. 1°2.5 shown in Table 2 of Example 2, a thermocouple inserted between the cylinder block and the cylinder head was adhered to a groove formed on the inner surface of the cylinder liner with a heat-resistant adhesive.
シリンダー内壁および冷却水が２５℃の状態でエンジン
を始動し、シリンダー内壁温度の上昇を測定した。結果
を第１図に示す。The engine was started with the cylinder inner wall and cooling water at 25° C., and the rise in cylinder inner wall temperature was measured. The results are shown in Figure 1.
第１図から明らかなように、熱伝導率が０．０３０ｃａ
ｌ ／Ｃ１ｌ −Ｓｅｅ ・℃未満の窒化珪素焼結体を
用いたシリンダライナーは、比較例に比べて始動時にシ
リンダー内壁温度が速やかに上昇することがわかり、始
動特性の向上が期待できる。As is clear from Figure 1, the thermal conductivity is 0.030ca.
It was found that the cylinder liner using the silicon nitride sintered body having a temperature of less than 1/C1l -See .degree. C. causes the cylinder inner wall temperature to rise more quickly at startup than the comparative example, and is expected to improve the startup characteristics.
（発明の効果）
以上詳細に説明したところから明らかなように、本発明
の機械構造部材によれば、熱伝導率が０．０３０ｃａｌ
／Ｃｌ１ｌ −ＳｅＧ ・℃未満の低熱伝導率の高密
度窒化珪素焼結体を使用して機械構造部材を構成してい
るため、従来の窒化珪素焼結体を用いた機械構造部材に
比べて断熱性に優れ、特に高温での稼動性能を向上する
ことができる。(Effects of the Invention) As is clear from the detailed explanation above, the mechanical structural member of the present invention has a thermal conductivity of 0.030 cal.
/Cl1l -SeG ・Since the mechanical structural members are constructed using high-density silicon nitride sintered bodies with low thermal conductivity of less than ℃, they have better thermal insulation than mechanical structural members using conventional silicon nitride sintered bodies. It has excellent properties and can improve operating performance, especially at high temperatures.
そのため本発明の機械構造部材は、ディーゼルエンジン
の副燃焼室、シリンダーヘッドおよびピストンギャップ
、さらにターボチャージャロータ。Therefore, the mechanical structural member of the present invention is applicable to a sub-combustion chamber, cylinder head and piston gap of a diesel engine, as well as a turbocharger rotor.
ガスタービンロータ等のエンジン部品、更にベアリング
等の機械部品として好適に応用することができる。It can be suitably applied to engine parts such as gas turbine rotors and mechanical parts such as bearings.
第１図は本発明の機械部品におけるシリンダー内壁温度
の上昇を示すグラフである。
特許出願人 日本碍子株式会社
第１図
晴Ｆ／ｌ （ｔ）FIG. 1 is a graph showing the rise in cylinder inner wall temperature in the mechanical parts of the present invention. Patent applicant Nippon Insulator Co., Ltd. Figure 1 Haru F/l (t)
Claims (1)
満である高密度窒化珪素焼結体を用いたことを特徴とす
る機械構造部材。1. A mechanical structural member characterized by using a high-density silicon nitride sintered body having a thermal conductivity of less than 0.030 cal/cm·sec·°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61106870A JP2545068B2 (en) | 1986-05-12 | 1986-05-12 | Machine structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61106870A JP2545068B2 (en) | 1986-05-12 | 1986-05-12 | Machine structural member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62265174A true JPS62265174A (en) | 1987-11-18 |
| JP2545068B2 JP2545068B2 (en) | 1996-10-16 |
Family
ID=14444571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61106870A Expired - Lifetime JP2545068B2 (en) | 1986-05-12 | 1986-05-12 | Machine structural member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545068B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6345174A (en) * | 1986-08-07 | 1988-02-26 | 株式会社 香蘭社 | Boron nitride base sintered body |
| JPH01230479A (en) * | 1988-03-10 | 1989-09-13 | Ngk Spark Plug Co Ltd | Structural member of internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127666U (en) * | 1985-01-28 | 1986-08-11 |
-
1986
- 1986-05-12 JP JP61106870A patent/JP2545068B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127666U (en) * | 1985-01-28 | 1986-08-11 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6345174A (en) * | 1986-08-07 | 1988-02-26 | 株式会社 香蘭社 | Boron nitride base sintered body |
| JPH01230479A (en) * | 1988-03-10 | 1989-09-13 | Ngk Spark Plug Co Ltd | Structural member of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2545068B2 (en) | 1996-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |