JPS60171275A - Formation of ceramic ring-form layer around metal axis - Google Patents

Formation of ceramic ring-form layer around metal axis

Info

Publication number
JPS60171275A
JPS60171275A JP2144584A JP2144584A JPS60171275A JP S60171275 A JPS60171275 A JP S60171275A JP 2144584 A JP2144584 A JP 2144584A JP 2144584 A JP2144584 A JP 2144584A JP S60171275 A JPS60171275 A JP S60171275A
Authority
JP
Japan
Prior art keywords
ceramic
outer layer
core material
formation
layer around
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
JP2144584A
Other languages
Japanese (ja)
Inventor
永谷 一喜
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP2144584A priority Critical patent/JPS60171275A/en
Publication of JPS60171275A publication Critical patent/JPS60171275A/en
Pending legal-status Critical Current

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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】 本発明は、金属から成る軸体の周りにセラミックの環状
層を形成する方法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming an annular layer of ceramic around a metal shaft.

セラミックは、耐摩耗性に極めて優れた材料であるが、
反面極めて脆弱な材料である。今後この材料が各方面で
多用されて行くためには、どうし′ても異種材料、例え
ば金属材料等と粗み合せて使って行くことが必要になっ
てくるが、脆弱で伸びのない点がこの妨たげになってい
る。特に軸体の周りにセラミックリングを外嵌して接合
する場合はやっかいである。高温で接合して冷却する過
程の中で膨張係数の差異、軸材の変態特性の影響を受け
てほとんど例外なく接合面で剥離したり、割れが起って
くる。本発明は、以上の様な状況に鑑みてなされたもの
であり、上記問題を解決したセラミック(サーメット等
を含む)の環状層を金属軸周に形成することが可能な新
規な方法を提供せんとするものである。
Ceramic is a material with extremely high wear resistance, but
On the other hand, it is an extremely fragile material. In order for this material to be widely used in various fields in the future, it will be necessary to use it in rough combinations with different materials, such as metal materials, but it is weak and has no elongation. This is getting in the way. This is particularly troublesome when fitting and joining a ceramic ring around the shaft. During the process of joining at high temperatures and cooling, the differences in expansion coefficients and the transformation characteristics of the shaft material almost always result in peeling or cracking at the joint surface. The present invention has been made in view of the above-mentioned circumstances, and provides a novel method capable of forming an annular layer of ceramic (including cermet, etc.) around a metal shaft, which solves the above-mentioned problems. That is.

本発明は、上記した問題を解決するために、次の様な手
段を講じたものである。
The present invention takes the following measures to solve the above problems.

(1)セラミックと軸材の接合には、高1(100’0
℃前後の温度)でのロー付、拡散接合が必要であるが、
この加熱昇温時、軸材が外層材によって拘束されて塑性
変形が起きない様に、外層のセラミック層は円周方向、
軸方向で複数個の部分に分割する。− 従来方法は、外層材を芯材に予め嵌合して加熱、昇温を
行う。このために、外層材よりも芯材の膨脹が大きい場
合、芯材には^温暉で塑性変形が起る。これが起ると、
最初に与えた外層を芯材の寸法的なバランスがこわれて
しまい、冷却過程での接合部の応力バランスがこわれ、
剥離や、亀裂が起ることがある。本発明では、外層材は
、分割されているので芯材は自由に膨張できる。
(1) High 1 (100'0
Brazing and diffusion bonding at temperatures around ℃ are required, but
During this heating and temperature rise, the outer ceramic layer is placed in the circumferential direction so that the shaft material is restrained by the outer layer material and plastic deformation does not occur.
Split into multiple parts in the axial direction. - In the conventional method, the outer layer material is fitted onto the core material in advance and then heated and the temperature is increased. For this reason, if the core material expands more than the outer layer material, plastic deformation occurs in the core material when heated. When this happens,
The dimensional balance of the outer layer and core material that was initially applied was destroyed, and the stress balance of the joint during the cooling process was destroyed.
Peeling or cracking may occur. In the present invention, since the outer layer material is divided, the core material can freely expand.

(2>−m的に線膨張係数の異なる部材を貼り合せた場
合、部材が大きくなればなる程、歪は大きくなり、剥離
しやすくなる。逆にこれを限りなく小さ、くすると、線
膨張係数のかなり違うものでも、バランスさせることが
できる。
(When members with different linear expansion coefficients are bonded together based on 2>-m, the larger the member, the greater the strain and the easier it is to peel off. Conversely, if this is made infinitely small, the linear expansion Even things with significantly different coefficients can be balanced.

本発明は、基本的にはこの様な考えに基づいたものであ
り外層のセラミックの分割数および寸法は、芯材の線膨
張係数、変態特性および接合温度等の条件を考慮して決
められており、外層、芯材の間で膨張、収縮の差が大き
ければ大きい程、外層は限りなく小さく分割されている
The present invention is basically based on this idea, and the number of divisions and dimensions of the outer ceramic layer are determined by taking into account conditions such as the linear expansion coefficient, transformation characteristics, and bonding temperature of the core material. In other words, the larger the difference in expansion and contraction between the outer layer and the core material, the more the outer layer is divided into infinitely small pieces.

本発明は、以上の様な特徴を有するものであり、その要
旨とするところは、金属軸周にセラミックの環状層を接
合するに際し、セラミック層を予め複数個の部分に分割
して、非連続体にして該分割片を該軸周に重ね合せて、
冶金的に接合することを特徴とする金属軸周にセラミッ
クの環状層を接合する方法である。
The present invention has the above-mentioned characteristics, and the gist thereof is that when joining a ceramic annular layer around a metal shaft, the ceramic layer is divided into a plurality of parts in advance and the ceramic layer is discontinuously divided into a plurality of parts. superimpose the divided pieces on the circumference of the shaft as a body,
This is a method of joining a ceramic annular layer around a metal shaft, which is characterized by metallurgical joining.

次に本発明を具体的に実施例によって説明する。Next, the present invention will be specifically explained by referring to examples.

実施例1゜ 外層材に超硬合金(WC−α)、芯材に軟鋼を使用 軟鋼芯材の外径、長さ: 100u+φx20Q外層材
の分割数 :円周方向 15分割(ただし外層材内面の
曲率は芯材外径の曲率に合せる。) 外層材内周面の全長 : 313.9mn+ロー付 :
 NI −Pアモルファス 箔 ロー付湯度 :約1000℃ ロー付雰囲気 :水蒸気 超硬分割リングと芯材の間にロー材をはさみ適当な冶具
で密着させて、加熱、昇温。
Example 1: Cemented carbide (WC-α) is used for the outer layer material, and mild steel is used for the core material.Outer diameter and length of the mild steel core material: 100u+φx20Q Number of divisions of the outer layer material: 15 divisions in the circumferential direction (however, The curvature should match the curvature of the outer diameter of the core material.) Total length of the inner circumferential surface of the outer layer material: 313.9 mm + with brazing:
NI-P amorphous foil brazing temperature: Approximately 1000°C Brazing atmosphere: Steam The brazing material is sandwiched between the carbide split ring and the core material and brought into close contact with a suitable jig, and heated to raise the temperature.

900℃前後の温度で外層と芯材の間にNI−Pの融液
が現れる。ロー付後は炉中で徐冷。
A melt of NI-P appears between the outer layer and the core material at a temperature of around 900°C. After brazing, it is slowly cooled in a furnace.

接合状況 接合部で剥離や亀裂は観察されず、冶金的に接合してい
ることが確認できた。また分割リングの間の隙間も実質
的にほぼ連続的に近い様な状態であった。
Joint status: No peeling or cracking was observed at the joint, confirming that the joint was metallurgical. In addition, the gaps between the split rings were substantially continuous.

実施例2゜ 外層材にセラミック、芯材に軟鋼を使用。Example 2゜ Ceramic is used for the outer layer material and mild steel is used for the core material.

セラミックの内面には、鵠をメタライズし、更にNI−
Pアモルファスを10μ無電解メツキ。
The inner surface of the ceramic is metallized with NI-
10μ electroless plating of P amorphous.

軟鋼芯材の外径、長さ: 1001mφx 100Q外
層材の分割数 二円周方向 30分割長さ方向 10分
割 外層材内周面の全長 : 314.1mmロー付 :銀
ロー(微粉ペース ト状) ロー付温度 :約800℃ ロー付雰囲気 :水素雰囲気 芯材表面に銀ローペーストを薄く添付して、外層材と重
ね合せ、密着させて加熱、昇温、ロー付後は炉中で徐冷
する。
Outer diameter and length of mild steel core material: 1001mφx Number of divisions of 100Q outer layer material 2 circumferential direction 30 divisions Length direction 10 divisions Total length of inner circumferential surface of outer layer material: 314.1mm Brazing: Silver solder (fine powder paste) Raw Brazing temperature: Approximately 800°C Brazing atmosphere: Hydrogen atmosphere A thin layer of silver brazing paste is applied to the surface of the core material, overlapped with the outer layer material, brought into close contact, heated, heated, and after brazing, slowly cooled in a furnace.

接合状況 接合部で剥離や亀裂は観察されず、冶金的に接合してい
ることが確認できた。
Joint status: No peeling or cracking was observed at the joint, confirming that the joint was metallurgical.

以上の様な工程によって、超硬合金やセラミックを芯材
の周囲に安定的に接合でき、しかも外層材の隙間はほと
んど使用に差しつかえない程度まで減少させることがで
き、連続に近い層が形成される。
Through the process described above, cemented carbide or ceramic can be stably bonded around the core material, and the gaps between the outer layer materials can be reduced to a point where it is almost unusable, forming a nearly continuous layer. be done.

本発明は、以上詳記した様な方法によってなされるが、
次の様な効果を有する。
The present invention is accomplished by the method detailed above,
It has the following effects.

(1)比較的大径のものにも可能である。(1) It is also possible to have a relatively large diameter.

(2)芯材に色々な金属を使用できる。(2) Various metals can be used for the core material.

(3)外層材のセラミックとしては、超硬合金の様なサ
ーメットからアルミナの様なものまで広い範囲で選定で
きる。
(3) The ceramic material for the outer layer can be selected from a wide range of materials, from cermets such as cemented carbide to materials such as alumina.

(4)比較的安価である。(4) It is relatively inexpensive.

Claims (1)

【特許請求の範囲】[Claims] 金属軸周にセラミックの環状層を接合するに際し、セラ
ミックを予め複数個の部分に分割して、非連続体にして
該分割片を該軸周に重ね合わせて、冶金的に接合するこ
とを特徴とする金属軸周にセラミックの環状層を形成す
る方法。
When joining an annular layer of ceramic to the periphery of a metal shaft, the ceramic is divided into a plurality of parts in advance, made into discontinuous pieces, and the divided pieces are superimposed on the periphery of the shaft and metallurgically joined. A method of forming an annular layer of ceramic around a metal shaft.
JP2144584A 1984-02-08 1984-02-08 Formation of ceramic ring-form layer around metal axis Pending JPS60171275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2144584A JPS60171275A (en) 1984-02-08 1984-02-08 Formation of ceramic ring-form layer around metal axis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2144584A JPS60171275A (en) 1984-02-08 1984-02-08 Formation of ceramic ring-form layer around metal axis

Publications (1)

Publication Number Publication Date
JPS60171275A true JPS60171275A (en) 1985-09-04

Family

ID=12055160

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2144584A Pending JPS60171275A (en) 1984-02-08 1984-02-08 Formation of ceramic ring-form layer around metal axis

Country Status (1)

Country Link
JP (1) JPS60171275A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155077A (en) * 1980-04-16 1981-12-01 Mtu Muenchen Gmbh Metal-ceramic member and its manufacture
JPS60124307A (en) * 1983-12-07 1985-07-03 ピツツバ−グ・コ−ニング・コ−ポレイシヨン Cellular ceramic insulator and manufacture thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155077A (en) * 1980-04-16 1981-12-01 Mtu Muenchen Gmbh Metal-ceramic member and its manufacture
JPS60124307A (en) * 1983-12-07 1985-07-03 ピツツバ−グ・コ−ニング・コ−ポレイシヨン Cellular ceramic insulator and manufacture thereof

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