JPH0987025A - Rolling bearing used in water of high temperature and high pressure - Google Patents

Rolling bearing used in water of high temperature and high pressure

Info

Publication number
JPH0987025A
JPH0987025A JP7249116A JP24911695A JPH0987025A JP H0987025 A JPH0987025 A JP H0987025A JP 7249116 A JP7249116 A JP 7249116A JP 24911695 A JP24911695 A JP 24911695A JP H0987025 A JPH0987025 A JP H0987025A
Authority
JP
Japan
Prior art keywords
rolling
test
bearing
stellite
high pressure
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
Application number
JP7249116A
Other languages
Japanese (ja)
Inventor
Masaaki Ochiai
政昭 落合
Yoshiyuki Kasahara
芳幸 笠原
Sho Imayoshi
祥 今吉
Kazunori Hayashida
一徳 林田
Hiroaki Takebayashi
博明 竹林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
Mitsubishi Heavy Industries Ltd
Japan Atomic Energy Agency
Original Assignee
Koyo Seiko Co Ltd
Japan Atomic Energy Research Institute
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koyo Seiko Co Ltd, Japan Atomic Energy Research Institute, Mitsubishi Heavy Industries Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP7249116A priority Critical patent/JPH0987025A/en
Publication of JPH0987025A publication Critical patent/JPH0987025A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/32Balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/62Selection of substances
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing having a long life even when the bearing is used in water of a high temp. and high pressure by forming the surface parts of rolling elements and raceway elements of specific materials and forming the surface parts of these rolling elements of materials which are of the kind different from the materials of the surface parts of the rolling elements and have high hardness. SOLUTION: At least the surface parts of the bearing wheels of the rolling bearing are formed of one kind of the materials selected from a group consisting of cermet, stellite and precipitation hardened stainless steel and at least the surface parts of the rolling elements are formed of one kind of the materials selected from a group consisting of cermet, stellite and ceramics composed mainly of silicon carbide. The surface parts of the bearing wheels and the surface parts of the rolling elements are formed of the different materials and these materials are so combined that the hardness of the surface parts of the rolling elements is higher than the hardness of the surface parts of the bearing wheels in the combinations of the surface members of the bearing wheels and the rolling elements.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、たとえば船舶用
原子炉に搭載される原子炉容器内装型制御棒駆動機構に
おいて高温高圧下の水中で使用される転がり軸受に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing used in water under high temperature and high pressure in a control rod drive mechanism with a built-in reactor vessel mounted on, for example, a marine reactor.

【0002】[0002]

【従来の技術】船舶用原子炉に搭載される原子炉容器内
装型制御棒駆動機構に用いられる転がり軸受は、高温高
圧下、たとえば320〜350℃、12〜15MPaの
水中という過酷な条件で使用されることになる。
2. Description of the Related Art Rolling bearings used in a control rod drive mechanism installed in a nuclear reactor vessel mounted on a marine reactor are used under severe conditions of high temperature and high pressure, such as 320 to 350 ° C. and 12 to 15 MPa of water. Will be done.

【0003】従来、高温、無潤滑で使用される転がり軸
受としては、内輪、外輪および転動体のうちの少なくと
も1つが炭化ケイ素を主体としたセラミックスで形成さ
れ、残りのものが窒化ケイ素を主体としたセラミックス
で形成されたものが知られている(特開昭62−566
20号参照)。
Conventionally, as a rolling bearing used at high temperature and without lubrication, at least one of an inner ring, an outer ring and a rolling element is formed of ceramics containing silicon carbide as a main component, and the rest is mainly composed of silicon nitride. It is known that it is formed of ceramics (Japanese Patent Laid-Open No. 62-566).
No. 20).

【0004】[0004]

【発明が解決しようとする課題】しかしながら、従来の
転がり軸受を高温高圧下の水中で使用した場合、窒化ケ
イ素からなる部品が短時間で腐食し、その結果転がり軸
受の寿命が短くなるという問題がある。
However, when the conventional rolling bearing is used in water under high temperature and high pressure, parts made of silicon nitride are corroded in a short time, resulting in shortening the life of the rolling bearing. is there.

【0005】この発明の目的は、上記問題を解決し、高
温高圧下の水中で使用した場合にも寿命が長い転がり軸
受を提供することにある。
An object of the present invention is to solve the above problems and provide a rolling bearing having a long life even when used in water under high temperature and high pressure.

【0006】[0006]

【課題を解決するための手段】この発明による高温高圧
下の水中で使用される転がり軸受は、少なくとも表面部
が、サーメット、ステライトおよび析出硬化系ステンレ
ス鋼からなる群から選ばれたいずれか1種の材料で形成
された軌道輪と、少なくとも表面部が、サーメット、ス
テライトおよび炭化ケイ素を主体とするセラミックスか
らなる群から選ばれたいずれか1種の材料で形成された
転動体とよりなり、軌道輪の表面部と転動体の表面部と
が異種材料で形成され、転動体の表面部の硬度が軌道輪
の表面部の硬度よりも高くなっているものである。
The rolling bearing used in water under high temperature and high pressure according to the present invention has at least one surface selected from the group consisting of cermet, stellite and precipitation hardening stainless steel. And a rolling element having at least the surface portion made of any one material selected from the group consisting of cermet, stellite, and ceramics mainly composed of silicon carbide. The surface of the ring and the surface of the rolling element are made of different materials, and the hardness of the surface of the rolling element is higher than the hardness of the surface of the race.

【0007】上記転がり軸受によれば、軌道輪が、少な
くとも表面部が、サーメット、ステライトおよび析出硬
化系ステンレス鋼からなる群から選ばれたいずれか1種
の材料で形成され、転動体が、少なくとも表面部が、サ
ーメット、ステライトおよび炭化ケイ素を主体とするセ
ラミックスからなる群から選ばれたいずれか1種の材料
で形成されているので、高温高圧下の水中で使用したと
しても、腐食のおそれが少なく、しかも軌道輪や転動体
の摩耗の度合いが少なくなって寿命が長くなる。
According to the above rolling bearing, at least the surface portion of the bearing ring is made of any one material selected from the group consisting of cermet, stellite and precipitation hardening stainless steel, and the rolling element is at least Since the surface portion is formed of any one material selected from the group consisting of cermet, stellite, and ceramics mainly composed of silicon carbide, even if used in water under high temperature and high pressure, there is a risk of corrosion. In addition, the degree of wear of the races and rolling elements is reduced and the service life is extended.

【0008】また、軌道輪の表面部と転動体の表面部と
が異種材料で形成されているので、軌道輪および転動体
のいずれにも金属粉が付着したうろこ状摩耗、すなわち
凝着摩耗が生じるのを防止することができ、軸受の寿命
が長くなる。さらに、転動体の表面部の硬度が軌道輪の
表面部の硬度よりも高くなっているので、軌道輪に比べ
て摩耗し易い転動体の耐摩耗性が向上して、軸受全体の
寿命が長くなる。
Further, since the surface portion of the bearing ring and the surface portion of the rolling element are made of different materials, scaly wear with metal powder adhered to both the bearing ring and the rolling element, that is, adhesive wear. It can be prevented from occurring and the life of the bearing is extended. Furthermore, the hardness of the surface of the rolling elements is higher than the hardness of the surface of the bearing ring, which improves the wear resistance of the rolling elements, which are more easily worn than the bearing rings, and extends the life of the entire bearing. Become.

【0009】上記転がり軸受において、軌道輪が、ステ
ンレス鋼製本体および本体の表面を覆うステライト製被
覆層よりなり、転動体が、炭化ケイ素を主体とするセラ
ミックスよりなることがある。ステライト製被覆層は、
たとえば溶射による硬化肉盛で形成される。
In the above rolling bearing, the race may consist of a stainless steel main body and a stellite coating layer covering the surface of the main body, and the rolling elements may consist of ceramics mainly composed of silicon carbide. Stellite coating layer,
For example, it is formed by hardfacing by thermal spraying.

【0010】また、上記転がり軸受において、軌道輪が
析出硬化系ステンレス鋼よりなり、転動体が炭化ケイ素
を主体とするセラミックスよりなることがある。
In the above rolling bearing, the bearing ring may be made of precipitation hardening stainless steel and the rolling element may be made of ceramics mainly composed of silicon carbide.

【0011】さらに、上記転がり軸受において、軌道輪
がサーメットよりなり、転動体が炭化ケイ素を主体とす
るセラミックスよりなることがある。
Further, in the above rolling bearing, the bearing ring may be made of cermet and the rolling elements may be made of ceramics mainly composed of silicon carbide.

【0012】軌道輪が、ステンレス鋼製本体および本体
の表面を覆うステライト製被覆層よりなるもの、析出硬
化系ステンレス鋼よりなるもの、ならびにサーメットよ
りなるものである場合、それぞれ比較的加工性に優れて
いるので、軌道輪の製造が容易になる。さらに、これら
の軌道輪の場合、それぞれその熱膨張係数が、セラミッ
クスに比較してステンレス鋼等の金属の熱膨張係数に近
くなるので、高温での使用時にステンレス鋼等からなる
金属製回転軸およびハウジングと軌道輪との間に隙間が
発生して軸受の内部諸元が変化するのを防止できる。
When the bearing ring is made of a stainless steel main body and a stellite coating layer that covers the surface of the main body, a precipitation hardening stainless steel, and a cermet, the workability is relatively excellent. Therefore, the manufacturing of the bearing ring is facilitated. Furthermore, in the case of these bearing rings, their respective thermal expansion coefficients are closer to the thermal expansion coefficient of metals such as stainless steel as compared with ceramics, so when used at high temperatures, metal rotating shafts made of stainless steel or It is possible to prevent a change in internal specifications of the bearing due to a gap between the housing and the bearing ring.

【0013】上記ステライトは、Co基合金であり、た
とえばCo40〜55wt%、Cr15〜35wt%、W1
0〜20wt%、C2〜4wt%、Fe5wt%以下の組成を
有するものを用いるのがよい。
The stellite is a Co-based alloy, for example, Co 40-55 wt%, Cr 15-35 wt%, W1.
It is preferable to use one having a composition of 0 to 20 wt%, C2 to 4 wt% and Fe of 5 wt% or less.

【0014】上記サーメットとしては、TiC45〜7
0wt%、TiN5〜10wt%、TaC5〜10wt%、M
2 C5〜10wt%、Ni10〜15wt%の組成を有す
るものを用いるのがよい。
As the cermet, TiC45 to 7
0 wt%, TiN 5-10 wt%, TaC 5-10 wt%, M
It is preferable to use one having a composition of o 2 C of 5 to 10 wt% and Ni of 10 to 15 wt%.

【0015】[0015]

【発明の実施形態】以下、この発明の実施形態を、図面
を参照して説明する。この実施の形態は、この発明を玉
軸受に適用したものである。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a ball bearing.

【0016】図1において、玉軸受は、深みぞ玉軸受で
あって、内輪(1) と、外輪(2) と、保持器(3) と、保持
器(3) に保持された複数の玉(4) とよりなる。
In FIG. 1, the ball bearing is a deep groove ball bearing, and includes an inner ring (1), an outer ring (2), a cage (3), and a plurality of balls held by the cage (3). It consists of (4).

【0017】内輪(1) および外輪(2) は、少なくとも表
面部が、サーメット、ステライトおよび析出硬化系ステ
ンレス鋼からなる群から選ばれたいずれか1種の材料で
形成されている。具体的にいえば、内輪(1) および外輪
(2) は、たとえばSUS304等の耐食性に優れたオー
ステナイト系ステンレス鋼製本体と、本体の表面を覆う
ステライト製被覆層とよりなる場合がある。この場合、
ステライトとしては、Co40〜55wt%、Cr15〜
35wt%、W10〜20wt%、C2〜4wt%、Fe5wt
%以下の組成を有するものが用いられる。また、内輪
(1) および外輪(2) は、SUS630等の析出硬化系ス
テンレス鋼よりなる場合がある。さらに、内輪(1) およ
び外輪(2) は、サーメットよりなる場合がある。この場
合、サーメットとしては、TiC45〜70wt%、Ti
N5〜10wt%、TaC5〜10wt%、Mo2 C5〜1
0wt%、Ni10〜15wt%という組成を有するものが
用いられる。なお、内輪(1) および外輪(2) は、同種の
材料であってもよいし、あるいは異種の材料であっても
よい。
At least the surface portions of the inner ring (1) and the outer ring (2) are made of any one material selected from the group consisting of cermet, stellite, and precipitation hardening stainless steel. Specifically, inner ring (1) and outer ring
(2) may consist of, for example, an austenitic stainless steel body having excellent corrosion resistance such as SUS304, and a stellite coating layer that covers the surface of the body. in this case,
As stellite, Co40-55 wt%, Cr15-
35wt%, W10-20wt%, C2-4wt%, Fe5wt
Those having a composition of not more than% are used. Also, the inner ring
(1) and the outer ring (2) may be made of precipitation hardening stainless steel such as SUS630. Further, the inner ring (1) and the outer ring (2) may be made of cermet. In this case, as the cermet, TiC45 to 70 wt%, Ti
N5~10wt%, TaC5~10wt%, Mo 2 C5~1
A material having a composition of 0 wt% and Ni of 10 to 15 wt% is used. The inner ring (1) and the outer ring (2) may be made of the same material or different materials.

【0018】保持器(3) は、たとえばSUS304、S
US316等の耐食性に優れたオーステナイト系ステン
レス鋼からなる。
The cage (3) is, for example, SUS304, S
It is made of austenitic stainless steel excellent in corrosion resistance such as US316.

【0019】玉(4) は、少なくとも表面部が、サーメッ
ト、ステライトおよび炭化ケイ素を主体とするセラミッ
クスからなる群から選ばれたいずれか1種の材料で形成
されている。具体的にいえば、玉(4) は、全体が炭化ケ
イ素を主体とするセラミックスよりなる場合がある。ま
た、玉(4) は、全体がサーメットよりなる場合がある。
この場合、サーメットとしては、TiC45〜70wt
%、TiN5〜10wt%、TaC5〜10wt%、Mo2
C5〜10wt%、Ni10〜15wt%という組成を有す
るものが用いられる。さらに、玉(4) は、全体がステラ
イトよりなる場合がある。この場合、ステライトとして
は、Co40〜55wt%、Cr15〜35wt%、W10
〜20wt%、C2〜4wt%、Fe5wt%以下の組成を有
するものが用いられる。
At least the surface portion of the ball (4) is made of any one material selected from the group consisting of cermet, stellite, and ceramics mainly composed of silicon carbide. Specifically, the balls (4) may be wholly made of ceramics mainly composed of silicon carbide. Also, the balls (4) may consist entirely of cermet.
In this case, as cermet, TiC45-70wt
%, TiN 5 to 10 wt%, TaC 5 to 10 wt%, Mo 2
A material having a composition of 5 to 10 wt% C and 10 to 15 wt% Ni is used. Furthermore, the balls (4) may consist entirely of stellite. In this case, as stellite, Co40-55 wt%, Cr15-35 wt%, W10
A material having a composition of ˜20 wt%, C2-4 wt% and Fe5 wt% or less is used.

【0020】なお、玉軸受としては、保持器を持たない
総玉軸受であってもよい。
The ball bearing may be a full ball bearing having no cage.

【0021】また、内外両輪(1)(2)と玉(4) とは表面部
が異種材料で形成され、しかも玉(4) の表面部の硬度が
内外両輪(1)(2)の表面部の硬度よりも高くなっている。
したがって、内外両輪(1)(2)と玉(4) との組み合わせ
は、たとえば次のようなものが選ばれる。
The surfaces of the inner and outer wheels (1) (2) and the balls (4) are made of different materials, and the hardness of the surface of the balls (4) is the surface of the inner and outer wheels (1) (2). It is higher than the hardness of the part.
Therefore, the combination of the inner and outer wheels (1) (2) and the balls (4) is selected as follows, for example.

【0022】内外両輪(1)(2)がそれぞれSUS304
製本体と、本体の表面を覆うステライト製被覆層とより
なり、玉(4) 全体が炭化ケイ素を主体とするセラミック
スよりなるもの。
Both inner and outer wheels (1) and (2) are made of SUS304.
It is composed of a main body and a coating layer made of stellite covering the surface of the main body, and the balls (4) are entirely made of ceramics mainly composed of silicon carbide.

【0023】内外両輪(1)(2)がそれぞれSUS630
よりなり、玉(4) 全体が炭化ケイ素を主体とするセラミ
ックスよりなるもの。
Both inner and outer wheels (1) and (2) are SUS630, respectively.
The whole ball (4) consists of ceramics mainly composed of silicon carbide.

【0024】内外両輪(1)(2)がそれぞれサーメットよ
りなり、玉(4) 全体が炭化ケイ素を主体とするセラミッ
クスよりなるもの。
Both the inner and outer wheels (1) and (2) are made of cermet, and the balls (4) are made entirely of ceramics mainly composed of silicon carbide.

【0025】玉軸受が原子炉容器内装型制御棒駆動機構
に使用される場合、材料中のCoは半減期の長い放射性
腐食生成物60Coの発生源となることがあり、作業従事
者の被爆低減の観点からは、〜の中では、Coを含
まないおよびであることが好ましい。
When the ball bearings are used in a control rod drive mechanism with a built-in reactor vessel, Co in the material may be a source of radioactive corrosion product 60 Co with a long half-life. From the viewpoint of reduction, it is preferable that Co is not contained in and.

【0026】なお、この発明は、玉軸受に限らず、ころ
軸受にも適用可能である。
The present invention is applicable not only to ball bearings but also roller bearings.

【0027】[0027]

【具体的実験例】[Specific experimental example]

実験例1 A:SUS630 B:Ni基合金(三菱マテリアル社製、商品名「ハステ
ロイC−22」) C:ステライト(三菱マテリアル社製、商品名「三菱ス
テライトNo.6B」) D:サーメット(TiC45〜70wt%、TiN5〜1
0wt%、TaC5〜10wt%、Mo2 C5〜10wt%、
Ni10〜15wt%) E:Si3 4 F:SiC 上記6種の材料からそれぞれ外径65mm、内径25m
m、厚さ5mmのリング状試験片を製作した。
Experimental Example 1 A: SUS630 B: Ni-based alloy (manufactured by Mitsubishi Materials, trade name "Hastelloy C-22") C: Stellite (manufactured by Mitsubishi Materials, trade name "Mitsubishi Stellite No. 6B") D: Cermet (TiC45 ~ 70wt%, TiN5-1
0 wt%, TaC 5-10 wt%, Mo 2 C 5-10 wt%,
Ni 10 to 15 wt%) E: Si 3 N 4 F: SiC From the above 6 materials, the outer diameter is 65 mm and the inner diameter is 25 m.
A ring-shaped test piece having a thickness of 5 mm and a thickness of 5 mm was manufactured.

【0028】ついで、材料A〜Cからなる試験片を1つ
のオートクレーブ内に、互いに接触せず、かつオートク
レーブ壁に接触しないように治具を用いて挿入するとと
もに、材料D〜Gからなる試験片を別の1つのオートク
レーブ内に、互いに接触せず、かつオートクレーブ壁に
接触しないように治具を用いて挿入した。各試験片、治
具およびオートクレーブ内面には、予め不純物を除去す
るための純水洗浄を施しておいた。
Then, the test pieces made of the materials A to C were inserted into one autoclave by using a jig so as not to come into contact with each other and the wall of the autoclave, and the test pieces made of the materials D to G were made. Was inserted into another autoclave using a jig so as not to contact each other and the wall of the autoclave. Each test piece, jig, and inner surface of the autoclave were previously washed with pure water to remove impurities.

【0029】ついで、オートクレーブ内にイオン交換純
水(125℃以下で0.5μs/cm)を、試験片が試
験中常時浸漬されるように注入した。
Then, ion-exchanged pure water (0.5 μs / cm at 125 ° C. or lower) was injected into the autoclave so that the test piece was always immersed during the test.

【0030】ついで、オートクレーブ内を昇温し、11
0〜120℃にて、オートクレーブ内部および純水中の
酸素を除去するための煮沸脱気を行い、溶存酸素濃度が
0.01ppm以下に保持されるようにした。
Then, the temperature inside the autoclave is raised to 11
At 0 to 120 ° C., boiling deaeration for removing oxygen in the autoclave and pure water was performed so that the dissolved oxygen concentration was maintained at 0.01 ppm or less.

【0031】その後、さらに試験温度である350±2
℃まで昇温し、圧力はその飽和蒸気圧(約16.5MP
a)として500時間および3000時間保持した。
After that, a further test temperature of 350 ± 2
The temperature is raised to ℃, and the pressure is its saturated vapor pressure (about 16.5MP
It was held as a) for 500 hours and 3000 hours.

【0032】そして、高温高圧の水中に500時間およ
び3000時間保持した後の試験片の外観を観察した。
その結果、材料A〜Cからなる試験片では、500時間
保持後でいずれの試験片もわずかに表面が黒色または茶
褐色に変色していた。また、3000時間保持後ではい
ずれの試験片の表面も全体が黒色に変色していたが、剥
離等の異常は認められなかった。材料Dからなる試験片
では、500時間保持後で表面状態が変化し、3000
時間保持後では表面に付着物が生成していた。材料Eか
らなる試験片では、500時間保持後で表面が脱色し、
3000時間保持後では表面が極度に腐食され、表層の
剥離が認められた。材料Fからなる試験片では、300
0時間保持後も表面状態には変化は認められず、ほぼ試
験前と同様な光沢を示していた。
Then, the appearance of the test pieces after being kept in high temperature and high pressure water for 500 hours and 3000 hours was observed.
As a result, in the test pieces made of the materials A to C, the surfaces of all the test pieces were slightly discolored to black or brown after being held for 500 hours. Further, after being kept for 3000 hours, the entire surface of each test piece was discolored to black, but no abnormality such as peeling was observed. In the test piece made of the material D, the surface condition was changed after holding for 500 hours,
After the time was kept, deposits were formed on the surface. In the test piece made of the material E, the surface was decolorized after being held for 500 hours,
After being kept for 3000 hours, the surface was extremely corroded and peeling of the surface layer was observed. For the test piece made of material F, 300
No change was observed in the surface condition after holding for 0 hours, and the gloss was almost the same as that before the test.

【0033】また、各試験片の腐食の度合いを調べるた
めに、単位面積および単位時間当りの重量変化を調べ
た。その結果、材料Aからなる試験片で−0.10mg
/dm2 ・day、材料Bからなる試験片で−0.05
mg/dm2 ・day、材料Cからなる試験片で−0.
10mg/dm2 ・day、材料Dからなる試験片で+
0.30mg/dm2 ・day、材料Eからなる試験片
で−8.69mg/dm2 ・day、材料Fからなる試
験片で−0.02mg/dm2 ・dayであった。
Further, in order to examine the degree of corrosion of each test piece, the change in weight per unit area and unit time was examined. As a result, the test piece made of the material A had -0.10 mg.
/ Dm 2 · day, -0.05 for the test piece made of material B
mg / dm 2 · day, with a test piece composed of the material C, −0.
+10 mg / dm 2 · day, with a test piece made of material D
0.30mg / dm 2 · day, it was -0.02mg / dm 2 · day in the test piece of material E -8.69mg / dm 2 · day, a test piece of material F.

【0034】なお、上記2つの試験において、材料Dか
らなる試験片の表面に付着物が生成し、重量が増加して
いる原因を調べるために、試験片の表面を電子線マイク
ロアナライザを用いて面分析した結果、Al、Si等が
検出された。これらは、主にSi3 4 の構成成分であ
り、材料Eからなる試験片の重量減少が顕著であったこ
とから、この試験片から溶出したAl、Siが材料Dか
らなる試験片の表面に付着したものだと考えられる。
In the above two tests, in order to investigate the cause of the increase in weight due to the formation of deposits on the surface of the test piece made of the material D, the surface of the test piece was examined with an electron beam microanalyzer. As a result of surface analysis, Al, Si, etc. were detected. Since these are mainly constituent components of Si 3 N 4 and the weight reduction of the test piece made of the material E was remarkable, Al and Si eluted from the test piece were the surface of the test piece made of the material D. It is thought to have adhered to.

【0035】さらに、高温高圧の水中に3000時間保
持した後の試験片を用いて転がり寿命試験を行った。こ
の試験は、図2に示すように、軸受材料の評価用として
一般に使用されているスラスト型(森式)転がり寿命試
験装置を用いて行った。図2において、この試験装置
は、調心性のあるホルダ(10)内に試験片(11)が固定さ
れ、その上にSUS304製保持器(12)に保持された6
個のSi3 4 製玉(13)(直径3/8インチ)がセット
され、回転駆動軸(14)の下端に固定されたSi3 4
リング(15)を玉(13)に押付けつつ回転駆動軸(14)を回転
させるものである。そして、ホルダ(10)内に試験片(1
1)、玉(13)およびリング(15)が浸漬されるように蒸留水
を注入しつつスラスト荷重45Kgf、回転速度120
0rpmで回転駆動軸(14)を回転させ、寿命を調べた。
寿命の判断は、試験装置に取付けられた振動計の指示値
が一定値を越えた時点とした。なお、高温高圧の水中で
3000時間保持しただけで、表面に剥離を生じていた
材料Eからなる試験片については、転がり寿命試験は行
わなかった。その結果を図3に示す。図3から、材料B
以外の材料からなる試験片では、十分な寿命を有するこ
とがわかる。
Further, a rolling life test was carried out using the test piece after being kept in high temperature and high pressure water for 3000 hours. This test was carried out using a thrust type (Mori type) rolling life test device that is generally used for evaluating bearing materials, as shown in FIG. In FIG. 2, in this test apparatus, a test piece (11) is fixed in a holder (10) having an aligning property, and a test piece (6) held by a SUS304 cage (12) is held thereon.
One Si 3 N 4 ball (13) (diameter 3/8 inch) is set, and the Si 3 N 4 ring (15) fixed to the lower end of the rotary drive shaft (14) is pressed against the ball (13). Meanwhile, the rotary drive shaft (14) is rotated. Then insert the test piece (1
1), the ball (13) and the ring (15) are soaked in distilled water that the load is 45 kgf and the rotation speed is 120.
The rotary drive shaft (14) was rotated at 0 rpm and the life was examined.
The life was judged when the indicated value of the vibrometer attached to the test device exceeded a certain value. The rolling life test was not performed on the test piece made of the material E, which had been peeled on the surface only after being kept in high temperature and high pressure water for 3000 hours. The result is shown in FIG. From Figure 3, Material B
It can be seen that the test pieces made of materials other than the above have a sufficient life.

【0036】上記3つの試験から、次のことが明らかに
なった。すなわち、材料E以外の材料では、高温高圧水
中での耐食性に優れているが、この中で材料Bでは、水
中での転がり寿命が十分ではなく、さらに過酷な条件で
ある高温高圧下の水中では使用に耐えないと考えられ
る。したがって、SUS630、三菱ステライトNo.
6B、サーメットおよびSiCが高温高圧下の水中で転
がり軸受として使用するのに適した材料であることがわ
かる。
From the above-mentioned three tests, the following was revealed. That is, materials other than the material E have excellent corrosion resistance in high temperature and high pressure water, but among them, the material B does not have sufficient rolling life in water, and in water under high temperature and high pressure, which is a more severe condition, It is considered to be unusable. Therefore, SUS630, Mitsubishi Stellite No.
It can be seen that 6B, cermet and SiC are suitable materials for use as rolling bearings in water under high temperature and high pressure.

【0037】実験例2 外径65mm、内径25mm、厚さ5mmのリング状試
験片と直径3/8インチの試験玉とよりなる組合せ試験
対称物を6種類用意した。
Experimental Example 2 Six kinds of combination test symmetrical products were prepared, which consisted of a ring-shaped test piece having an outer diameter of 65 mm, an inner diameter of 25 mm and a thickness of 5 mm and a test ball having a diameter of 3/8 inch.

【0038】U:SUS304からなる外径65mm、
内径25mm、厚さ3mmのリングの一端面に、酸素ア
セチレンガス法による硬化肉盛によってステライト(三
菱マテリアル社製、商品名「三菱ステライトNo.
1」)からなる厚さ2mmの被覆層を形成し、被覆層表
面を十点平均粗さRzが0.1μm以下となるように仕
上げた試験片(被覆層の表面硬さ:ロックウェルC硬さ
HRC =54〜56)と、ステライト(三菱マテリアル社
製、商品名「三菱ステライトNo.12」)からなりか
つ真円度0.5μm以下、表面粗さを十点平均粗さRz
で0.1〜0.4μmになるように仕上げた試験玉(表
面硬さ:ロックウェルC硬さHRC =42〜45)との組
合せ試験対称物。
U: 65 mm outer diameter made of SUS304,
On one end surface of a ring having an inner diameter of 25 mm and a thickness of 3 mm, stellite (trade name “Mitsubishi Stellite No.
1 "), a coating layer having a thickness of 2 mm was formed, and the coating layer surface was finished so that the ten-point average roughness Rz was 0.1 μm or less (surface hardness of coating layer: Rockwell C hardness. It
HRC = 54 to 56) and Stellite (trade name "Mitsubishi Stellite No. 12" manufactured by Mitsubishi Materials Corporation), and the circularity is 0.5 µm or less, and the surface roughness is 10-point average roughness Rz.
A combination test symmetry object with a test ball (surface hardness: Rockwell C hardness HRC = 42 to 45) finished to 0.1 to 0.4 μm.

【0039】V:SUS304からなる外径65mm、
内径25mm、厚さ3mmのリングの一端面に、酸素ア
セチレンガス法による硬化肉盛によってステライト(三
菱マテリアル社製、商品名「三菱ステライトNo.
1」)からなる厚さ2mmの被覆層を形成し、被覆層表
面を十点平均粗さRzが0.1μm以下となるように仕
上げた試験片(被覆層の表面硬さ:ロックウェルC硬さ
HRC =54〜56)と、SiCからなりかつ真円度0.
5μm以下、表面粗さを十点平均粗さRzで0.1〜
0.4μmになるように仕上げた試験玉(表面硬さ:ビ
ッカース硬さHv=2000〜2500)との組合せ試験
対称物。
V: 65 mm outer diameter made of SUS304,
On one end surface of a ring having an inner diameter of 25 mm and a thickness of 3 mm, stellite (trade name “Mitsubishi Stellite No.
1 "), a coating layer having a thickness of 2 mm was formed, and the coating layer surface was finished so that the ten-point average roughness Rz was 0.1 μm or less (surface hardness of coating layer: Rockwell C hardness. It
HRC = 54 to 56), and made of SiC and having a circularity of 0.
5 μm or less, the surface roughness is 0.1-point average roughness Rz of 0.1 to
Combination test symmetrical product with a test ball (surface hardness: Vickers hardness Hv = 2000 to 2500) finished to 0.4 μm.

【0040】W:SUS304からなる外径65mm、
内径25mm、厚さ3mmのリングの一端面に、酸素ア
セチレンガス法による硬化肉盛によってステライト(三
菱マテリアル社製、商品名「三菱ステライトNo.1
2」)からなる厚さ2mmの被覆層を形成し、被覆層表
面を十点平均粗さRzが0.1μm以下となるように仕
上げた試験片(被覆層の表面硬さ:ロックウェルC硬さ
HRC =49〜52)と、ステライト(三菱マテリアル社
製、商品名「三菱ステライトNo.3」)からなりかつ
真円度0.5μm以下、表面粗さを十点平均粗さRzで
0.1〜0.4μmになるように仕上げた試験玉(表面
硬さ:ロックウェルC硬さHRC =50〜52)との組合
せ試験対称物。
W: 65 mm outer diameter made of SUS304,
On one end surface of a ring having an inner diameter of 25 mm and a thickness of 3 mm, stellite (trade name “Mitsubishi Stellite No. 1 manufactured by Mitsubishi Materials Co., Ltd.” was formed by hardfacing by an oxygen acetylene gas method.
2 ″) having a thickness of 2 mm, and the surface of the coating layer was finished so that the ten-point average roughness Rz was 0.1 μm or less (surface hardness of coating layer: Rockwell C hardness It
HRC = 49 to 52) and Stellite (trade name "Mitsubishi Stellite No. 3" manufactured by Mitsubishi Materials Corporation), and has a roundness of 0.5 µm or less and a surface roughness of 0.1 at a ten-point average roughness Rz. A combination test symmetrical product with a test ball (surface hardness: Rockwell C hardness HRC = 50 to 52) finished to be ~ 0.4 µm.

【0041】X:SUS630からなる外径65mm、
内径25mm、厚さ5mmのリングの一端面を十点平均
粗さRzが0.1μm以下となるように仕上げた試験片
(被覆層の表面硬さ:ロックウェルC硬さHRC =40〜
45)と、SiCからなりかつ真円度0.5μm以下、
表面粗さを十点平均粗さRzで0.1〜0.4μmにな
るように仕上げた試験玉(表面硬さ:ビッカース硬さHv
=2000〜2500)との組合せ試験対称物。
X: SUS630 outer diameter 65 mm,
One end surface of a ring having an inner diameter of 25 mm and a thickness of 5 mm was finished so that the ten-point average roughness Rz was 0.1 μm or less (surface hardness of coating layer: Rockwell C hardness HRC = 40 to
45) and made of SiC and having a circularity of 0.5 μm or less,
A test ball with a surface roughness of 10-point average roughness Rz of 0.1 to 0.4 μm (surface hardness: Vickers hardness Hv
= 2000-2500).

【0042】Y:SUS304からなる外径65mm、
内径25mm、厚さ3mmのリングの一端面に、酸素ア
セチレンガス法による硬化肉盛によってFe基合金(三
菱マテリアル社製、商品名「MA−CS」)からなる厚
さ2mmの被覆層を形成し、被覆層表面を十点平均粗さ
Rzが0.1μm以下となるように仕上げた試験片(被
覆層の表面硬さ:ロックウェルC硬さHRC =36〜3
8)と、Ni基合金(三菱マテリアル社製、商品名「M
Aプラストハード」)からなりかつ真円度0.5μm以
下、表面粗さを十点平均粗さRzで0.1〜0.4μm
になるように仕上げた試験玉(表面硬さ:ロックウェル
C硬さHRC =41〜45)との組合せ試験対称物。
Y: 65 mm outer diameter made of SUS304,
A coating layer having a thickness of 2 mm and made of a Fe-based alloy (trade name "MA-CS" manufactured by Mitsubishi Materials Corp.) was formed on one end surface of a ring having an inner diameter of 25 mm and a thickness of 3 mm by hardfacing by an oxygen acetylene gas method. , A test piece whose coating layer surface was finished so that the ten-point average roughness Rz was 0.1 μm or less (surface hardness of coating layer: Rockwell C hardness HRC = 36 to 3).
8) and Ni-based alloy (manufactured by Mitsubishi Materials Corporation, trade name "M
A plasthard ”) and has a circularity of 0.5 μm or less and a surface roughness of 0.1-0.4 μm in terms of ten-point average roughness Rz.
Combination test symmetry product with a test ball (surface hardness: Rockwell C hardness HRC = 41 to 45) finished to be.

【0043】Z:サーメット(TiC45〜70wt%、
TiN5〜10wt%、TaC5〜10wt%、Mo2 C5
〜10wt%、Ni10〜15wt%)からなる外径65m
m、内径25mm、厚さ5mmのリングの一端面を十点
平均粗さRzが0.1μm以下となるように仕上げた試
験片(表面硬さ:ビッカース硬さHv=1400〜160
0)と、SiCからなりかつ真円度0.5μm以下、表
面粗さを十点平均粗さRzで0.1〜0.4μmになる
ように仕上げた試験玉(表面硬さ:ビッカース硬さHv=
2000〜2500)との組合せ試験対称物。
Z: Cermet (TiC 45 to 70 wt%,
TiN 5-10 wt%, TaC 5-10 wt%, Mo 2 C 5
65m outside diameter consisting of 10-10 wt%, Ni 10-15 wt%)
A test piece (surface hardness: Vickers hardness Hv = 1400 to 160) in which one end surface of a ring having a diameter of m, an inner diameter of 25 mm and a thickness of 5 mm was finished so that the ten-point average roughness Rz was 0.1 μm or less.
0) and SiC and having a roundness of 0.5 μm or less and a surface roughness of 10-point average roughness Rz of 0.1 to 0.4 μm (surface hardness: Vickers hardness). Hv =
2000-2500) Combination test symmetrical object.

【0044】そして、図2に示す試験装置を使用して水
中転がり摩耗試験を行った。すなわち、試験装置のホル
ダ(10)内に各組合せ試験対称物の試験片(11)および試験
玉(13)をセットし、室温においてホルダ(10)内に蒸留水
を注入しつつスラスト荷重45Kgf、回転速度120
0rpmで回転駆動軸(14)を100時間回転させ、試験
装置に取付けられた振動計の指示値が、初期値の15倍
になった時点で回転駆動軸を停止させた。その結果を図
4に示す。組合せ試験対称物VおよびZでは100時間
経過した後も振動計の指示値が、初期値の15倍に達し
なかった。
Then, an underwater rolling wear test was conducted using the test apparatus shown in FIG. That is, the test piece (11) and the test ball (13) of each combination test symmetrical object are set in the holder (10) of the test apparatus, and the thrust load is 45 kgf while pouring distilled water into the holder (10) at room temperature, Rotation speed 120
The rotary drive shaft (14) was rotated at 0 rpm for 100 hours, and the rotary drive shaft was stopped when the indicated value of the vibrometer attached to the test device reached 15 times the initial value. FIG. 4 shows the results. With the combination test symmetrical objects V and Z, the indicated value of the vibrometer did not reach 15 times the initial value even after 100 hours had elapsed.

【0045】また、試験後の各組合せ試験対称物の試験
片および試験玉の外観を観察した。その結果、組合せ試
験対称物U、WおよびYにおいては、試験片および試験
玉のいずれもが金属光沢を失っており、摩耗主体の損傷
形態を示していた。また、SEM観察を行った結果、こ
れらの組合せ試験対称物の試験片の損傷部および試験玉
表面が、金属粉が付着したようなうろこ状摩耗を呈して
おり、試験片と試験玉との間で凝着摩耗を起こしてい
た。また、組合せ試験対称物VおよびXおいては、試験
片の損傷部分は金属光沢を失ってはいるものの、試験玉
は試験前と同等の金属光沢を有していた。さらに、組合
せ試験対称物Zおいては、試験片に転走痕が見られ、転
走部分の表面および試験玉の表面に摩耗等の異常は見ら
れず、試験玉は試験前と同等の金属光沢を有していた。
Further, the appearance of the test pieces and test balls of each combination test symmetrical product after the test was observed. As a result, in the combination test symmetrical products U, W, and Y, both the test piece and the test ball lost the metallic luster, indicating a damage form mainly due to wear. In addition, as a result of SEM observation, the damaged portion and the test ball surface of the test piece of the combination test symmetrical object showed scaly wear like metal powder adhered, and between the test piece and the test ball. Was causing adhesion wear. Further, in the combination test symmetrical objects V and X, although the damaged portion of the test piece lost the metallic luster, the test ball had the metallic luster equivalent to that before the test. Further, in the combination test symmetrical object Z, rolling marks were observed on the test piece, no abnormality such as abrasion was observed on the surface of the rolling part and the surface of the test ball, and the test ball was made of the same metal as before the test. It had a luster.

【0046】さらに、各組合せ試験対称物の試験片およ
び試験玉の摩耗の度合いを調べるために、減少した重量
と試験時間に基いて、単位時間当りの体積変化を調べ
た。その結果を図5および図6に示す。なお、図5が試
験片の体積変化であり、図6が試験玉の体積変化であ
る。図5および図6から、組合せ試験対称物V、Xおよ
びZの試験片および試験玉のいずれもの摩耗度合いが、
組合せ試験対称物U、WおよびYに比べて極めて小さい
ことがわかる。
Further, in order to examine the degree of wear of the test piece and the test ball of each combination test symmetrical object, the volume change per unit time was examined based on the reduced weight and the test time. The results are shown in FIGS. 5 shows the volume change of the test piece, and FIG. 6 shows the volume change of the test ball. From FIGS. 5 and 6, the wear degree of any of the test pieces and the test balls of the combination test symmetrical objects V, X and Z is
It can be seen that it is extremely small compared to the combination test symmetrical objects U, W and Y.

【0047】上記試験から、次のことが明らかになっ
た。すなわち、水中で使用される転がり軸受としては、
上記組合せ試験対称物V、XおよびZのように、軌道輪
と転動体が異種材料で形成されているのがよい。この中
でも、軌道輪と転動体との組合せが、上記組合せ試験対
称物Vと同じであることが好ましく、特に上記組合せ試
験対称物Zと同じであることが望ましいことがわかる。
From the above test, the following was revealed. That is, as a rolling bearing used underwater,
As in the above-mentioned combination test symmetrical objects V, X and Z, it is preferable that the races and the rolling elements are made of different materials. Among these, it is understood that the combination of the bearing ring and the rolling element is preferably the same as the combination test symmetrical object V, and particularly the same as the combination test symmetrical object Z.

【0048】[0048]

【発明の効果】この発明の請求項1の転がり軸受によれ
ば、上述のように、高温高圧下の水中で使用したとして
も、腐食のおそれがなく、しかも軌道輪や転動体の摩耗
の度合いが少なくなり、その結果軸受の寿命が長くな
る。
According to the rolling bearing of claim 1 of the present invention, as described above, even when used in water under high temperature and high pressure, there is no risk of corrosion and the degree of wear of the races and rolling elements is high. Less, resulting in longer bearing life.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明を適用した玉軸受の部分縦断面図であ
る。
FIG. 1 is a partial vertical sectional view of a ball bearing to which the present invention is applied.

【図2】実験例1および2において、水中での転がり試
験に用いた試験装置の概略を示す垂直断面図である。
FIG. 2 is a vertical sectional view schematically showing a test apparatus used for a rolling test in water in Experimental Examples 1 and 2.

【図3】実験例1における水中での転がり寿命試験の結
果を示すグラフである。
FIG. 3 is a graph showing the results of a rolling life test in water in Experimental Example 1.

【図4】実験例2における水中での転がり摩耗試験の結
果を示すグラフである。
FIG. 4 is a graph showing the results of a rolling wear test in water in Experimental Example 2.

【図5】実験例2における転がり摩耗試験のさいの試験
片の摩耗度合いを示すグラフである。
FIG. 5 is a graph showing the degree of wear of a test piece during a rolling wear test in Experimental Example 2.

【図6】実験例2における転がり摩耗試験のさいの試験
玉の摩耗度合いを示すグラフである。
FIG. 6 is a graph showing the degree of wear of a test ball during a rolling wear test in Experimental Example 2.

【符号の説明】[Explanation of symbols]

(1) 内輪 (2) 外輪 (4) 玉 (1) Inner ring (2) Outer ring (4) Ball

───────────────────────────────────────────────────── フロントページの続き (72)発明者 笠原 芳幸 埼玉県熊谷市本石1−6 (72)発明者 今吉 祥 東京都千代田区丸の内二丁目5番1号 三 菱重工業株式会社内 (72)発明者 林田 一徳 大阪市中央区南船場三丁目5番8号 光洋 精工株式会社内 (72)発明者 竹林 博明 大阪市中央区南船場三丁目5番8号 光洋 精工株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiyuki Kasahara 1-6 Honishi, Kumagaya-shi, Saitama (72) Inventor Sho Sho Imayoshi 2-5-1, Marunouchi, Chiyoda-ku, Tokyo Sanryo Heavy Industries Co., Ltd. (72 ) Inventor Kazunori Hayashida 3-5-8 Minamisenba, Chuo-ku, Osaka City Koyo Seiko Co., Ltd. (72) Hiroaki Takebayashi 3-5-8 Minamisenba, Chuo-ku, Osaka City Koyo Seiko Co., Ltd.

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 少なくとも表面部が、サーメット、ステ
ライトおよび析出硬化系ステンレス鋼からなる群から選
ばれたいずれか1種の材料で形成された軌道輪と、 少なくとも表面部が、サーメット、ステライトおよび炭
化ケイ素を主体とするセラミックスからなる群から選ば
れたいずれか1種の材料で形成された転動体とよりな
り、 軌道輪の表面部と転動体の表面部とが異種材料で形成さ
れ、転動体の表面部の硬度が軌道輪の表面部の硬度より
も高くなっている高温高圧下の水中で使用される転がり
軸受。
1. A bearing ring having at least a surface portion formed of one material selected from the group consisting of cermet, stellite, and precipitation hardening stainless steel; and at least a surface portion having a cermet, stellite, and carbonized material. The rolling element is made of any one material selected from the group consisting of ceramics mainly composed of silicon, and the surface portion of the bearing ring and the surface portion of the rolling element are made of different materials. Rolling bearing used in water under high temperature and high pressure, where the hardness of the surface of the bearing is higher than the hardness of the surface of the bearing ring.
【請求項2】 軌道輪が、ステンレス鋼製本体および本
体の表面を覆うステライト製被覆層よりなり、転動体
が、炭化ケイ素を主体とするセラミックスよりなる請求
項1記載の高温高圧下の水中で使用される転がり軸受。
2. The submerged water under high temperature and high pressure according to claim 1, wherein the bearing ring is made of a stainless steel main body and a stellite coating layer covering the surface of the main body, and the rolling element is made of ceramics mainly composed of silicon carbide. Rolling bearing used.
【請求項3】 ステライトが、Co40〜55wt%、C
r15〜35wt%、W10〜20wt%、C2〜4wt%、
Fe5wt%以下の組成を有する請求項1または2記載の
高温高圧下の水中で使用される転がり軸受。
3. Stellite is 40 to 55 wt% Co and C
r15-35 wt%, W10-20 wt%, C2-4 wt%,
The rolling bearing used in water under high temperature and high pressure according to claim 1 or 2, having a composition of Fe 5 wt% or less.
【請求項4】 軌道輪が析出硬化系ステンレス鋼よりな
り、転動体が炭化ケイ素を主体とするセラミックスより
なる請求項1記載の高温高圧下の水中で使用される転が
り軸受。
4. The rolling bearing used in water under high temperature and high pressure according to claim 1, wherein the bearing ring is made of precipitation hardening stainless steel, and the rolling elements are made of ceramics mainly containing silicon carbide.
【請求項5】 軌道輪がサーメットよりなり、転動体が
炭化ケイ素を主体とするセラミックスよりなる請求項1
記載の高温高圧下の水中で使用される転がり軸受。
5. The bearing ring is made of cermet, and the rolling elements are made of ceramics containing silicon carbide as a main component.
A rolling bearing used in water under the high temperature and high pressure described.
【請求項6】 サーメットが、TiC45〜70wt%、
TiN5〜10wt%、TaC5〜10wt%、Mo2 C5
〜10wt%、Ni10〜15wt%の組成を有する請求項
1または5記載の高温高圧下の水中で使用される転がり
軸受。
6. The cermet comprises 45 to 70 wt% of TiC,
TiN 5-10 wt%, TaC 5-10 wt%, Mo 2 C 5
The rolling bearing used in water under high temperature and high pressure according to claim 1 or 5, which has a composition of 10 to 10 wt% and Ni of 10 to 15 wt%.
JP7249116A 1995-09-27 1995-09-27 Rolling bearing used in water of high temperature and high pressure Pending JPH0987025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7249116A JPH0987025A (en) 1995-09-27 1995-09-27 Rolling bearing used in water of high temperature and high pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7249116A JPH0987025A (en) 1995-09-27 1995-09-27 Rolling bearing used in water of high temperature and high pressure

Publications (1)

Publication Number Publication Date
JPH0987025A true JPH0987025A (en) 1997-03-31

Family

ID=17188193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7249116A Pending JPH0987025A (en) 1995-09-27 1995-09-27 Rolling bearing used in water of high temperature and high pressure

Country Status (1)

Country Link
JP (1) JPH0987025A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000019189A (en) * 1998-07-06 2000-01-21 Mitsubishi Heavy Ind Ltd Rolling bearing, and moving condition measuring device for rolling element for rolling bearing
EP1217235A2 (en) 2000-12-21 2002-06-26 Aktiebolaget SKF Rolling bearing
KR100437009B1 (en) * 2002-06-12 2004-06-23 조규환 Cap Bearing
JP2009036379A (en) * 2008-09-26 2009-02-19 Jtekt Corp Rolling bearing
JP2009250797A (en) * 2008-04-07 2009-10-29 Ntn Corp Lubricity evaluation device of lubricant for rolling bearing and lubricity evaluation method
CN107993732A (en) * 2017-11-23 2018-05-04 厦门大学 A kind of automatic level adjusting device of sea nuclear power unit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000019189A (en) * 1998-07-06 2000-01-21 Mitsubishi Heavy Ind Ltd Rolling bearing, and moving condition measuring device for rolling element for rolling bearing
US6702473B2 (en) * 2000-12-18 2004-03-09 Aktiebolaget Skf Rolling bearing
EP1217235A2 (en) 2000-12-21 2002-06-26 Aktiebolaget SKF Rolling bearing
KR100437009B1 (en) * 2002-06-12 2004-06-23 조규환 Cap Bearing
JP2009250797A (en) * 2008-04-07 2009-10-29 Ntn Corp Lubricity evaluation device of lubricant for rolling bearing and lubricity evaluation method
JP2009036379A (en) * 2008-09-26 2009-02-19 Jtekt Corp Rolling bearing
CN107993732A (en) * 2017-11-23 2018-05-04 厦门大学 A kind of automatic level adjusting device of sea nuclear power unit
CN107993732B (en) * 2017-11-23 2019-06-07 厦门大学 A kind of automatic level adjusting device of sea nuclear power unit

Similar Documents

Publication Publication Date Title
Hintermann Tribological and protective coatings by chemical vapour deposition
JP3588935B2 (en) Rolling bearings and other rolling devices
JP3646467B2 (en) Rolling bearing
US20010055432A1 (en) Rolling bearing
WO2007139197A1 (en) Rolling device
JPH1060617A (en) High speed flame spraying method
JP3886394B2 (en) Covering material with corrosion resistance and wear resistance
US6158963A (en) Coated article and method for inhibiting frictional wear between mating titanium alloy substrates in a gas turbine engine
US20100087346A1 (en) Solid film lubricated high oxidation temperature rhenium material
US6089828A (en) Coated article and method for inhibiting frictional wear between mating titanium alloy substrates in a gas turbine engine
JPH0987025A (en) Rolling bearing used in water of high temperature and high pressure
EP2657551A1 (en) Ball joint
Hintermann Exploitation of wear-and corrosion-resistant cvd-coatings
EP3578839A1 (en) Rolling bearing
JP2008248986A (en) Piston ring
JP2535105B2 (en) Sliding bearing with composite plating film
JP3105486B2 (en) Cage for rolling bearing
JP2003254340A (en) Bearing device
JP2007232052A (en) Rolling bearing for business machine
JP4513775B2 (en) Rolling device for rolling mill roll neck
JP2005213612A (en) Thermal spraying roll with wc cermet
JP2009204078A (en) Rolling device
EP1697560A2 (en) Rolling bearing having a nickel-phosphorus coating
JP3133970B2 (en) Rope car
JP4620191B2 (en) Al alloy pulley with excellent fatigue life and wear resistance, and method for plating an aluminum alloy pulley

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040727

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040924

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20041130

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20041227

A911 Transfer of reconsideration by examiner before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20050131

A912 Removal of reconsideration by examiner before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A912

Effective date: 20050311

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20060228

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060303