JP2561517B2 - Sintered product manufacturing method and sintered product - Google Patents
Sintered product manufacturing method and sintered productInfo
- Publication number
- JP2561517B2 JP2561517B2 JP63216138A JP21613888A JP2561517B2 JP 2561517 B2 JP2561517 B2 JP 2561517B2 JP 63216138 A JP63216138 A JP 63216138A JP 21613888 A JP21613888 A JP 21613888A JP 2561517 B2 JP2561517 B2 JP 2561517B2
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- layers
- powder
- sintering
- mesh
- 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
Landscapes
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 建設機械や一般産業機械に使用されるスラストリン
グ、シールリング等の薄肉リングや、薄肉円板、薄肉円
筒等の焼結時に歪み易い部品を低歪で焼結するようにし
た焼結品の製造方法及びその焼結品に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) Thin-walled rings such as thrust rings and seal rings used in construction machinery and general industrial machinery, thin-walled discs, thin-walled cylinders, and other parts that are easily distorted during sintering are described. The present invention relates to a method for manufacturing a sintered product that is sintered with low strain and the sintered product.
（従来の技術） 一般に、スラストリングのような薄肉リングの焼結体
は、高密度化の過程に於て大きく変形する。このように
変形する原因は、焼結炉内での焼結品の温度分布の不均
一性や、収縮時の焼結体と基板との摩擦抵抗の不均一性
によるものと考えられており、例えば外径100mmφ、内
径80mmφ、厚さ4mmの薄肉リング品では真円度、そりが
各々1mm以上を越えることも珍しくない。前記、真円
度、そりの発生を押さえるために、従来、治具または空
圧、液圧によるプレス圧力を印加しながら焼結したり、
焼結後にサイジング、コイニングと呼ばれる寸法出しの
ための再加圧処理が施されている。(Prior Art) Generally, a sintered body of a thin ring such as a thrust ring is largely deformed in the process of densification. The cause of such deformation is considered to be due to the non-uniformity of the temperature distribution of the sintered product in the sintering furnace and the non-uniformity of the frictional resistance between the sintered body and the substrate during contraction, For example, it is not uncommon for roundness and warpage to exceed 1 mm or more for thin-walled ring products with an outer diameter of 100 mm φ , an inner diameter of 80 mm φ , and a thickness of 4 mm. In order to suppress the roundness and the generation of warpage, conventionally, a jig or air pressure, sintering while applying a press pressure by liquid pressure,
After sintering, a re-pressurizing process for dimensioning called sizing and coining is performed.
（発明が解決しようとする課題） 前記従来の技術に於ては、治具を使用したり、空圧、
液圧によるプレス加圧が必要であるため生産性が低く、
又設備費も高価になる欠点があった。又、サイジング、
コイニング処理では、焼結体をより高密度化する上では
効果的な方法であるが、真円度、そりが一定限度以上に
なるとこの処理が不可能になるため、取り代を見込んだ
焼結品を製作する必要があり、そのために歩留まりを低
下させ、コストアップの原因となっていた。(Problems to be Solved by the Invention) In the above-mentioned conventional technique, a jig is used, air pressure,
Productivity is low because pressurization by liquid pressure is required,
In addition, the equipment cost is high. Also, sizing,
Coining is an effective method for increasing the density of the sintered body, but if the roundness and warp exceed a certain limit, this processing becomes impossible, so a sintering allowance is required. It was necessary to manufacture products, which reduced the yield and increased the cost.
（課題を解決するための手段） 本発明は前記従来の技術に於ける課題を解決するため
に成されたもので、異種成分から成る焼結粉末成形層を
重ねて焼結する低歪焼結品の製造方法において、前記焼
結粉末成形体は、同一の焼結粉末成分からなる二つの表
面層と、この二つの表面層が焼結後の相対密度93％以上
に焼結する温度においては、前記二つの表面層より焼結
時における収縮または膨張が小さいと焼結粉末成分に調
整され、かつ前記二つの表面層間に配置された中間層と
により形成されることを特徴とする低歪焼結品の製造方
法、および異種成分からなる各焼結層間の境界が焼結に
より拡散接合された低歪焼結品において、前記各焼結層
は二つの表面焼結層とこの二つの表面焼結層間に挟まれ
た中間焼結層とからなり、前記二つの表面焼結層はそれ
ぞれ250メッシュ以下のSn粉、Ｐ−Fe粉、およびPb粉、
残りが200メッシュ以下の電解銅から成る焼結粉末成形
体から焼結され、焼結後の相対密度が93％以上に緻密化
された銅を主成分とする焼結層であり、中間焼結層は、
それぞれ250メッシュ以下のCu粉、Sn粉、Ｐ−Fe粉、残
りが100メッシュ以下のFe粉から成る焼結粉末成形体か
ら焼結され、前記二つの表面焼結層の焼結時における収
縮または膨張より小さい成分に調整された鉄を主成分と
する焼結層である低歪焼結品を用いることによって目的
を達成することができる。(Means for Solving the Problems) The present invention has been made to solve the problems in the above-mentioned conventional techniques, and is low strain sintering in which sintered powder compact layers composed of different components are stacked and sintered. In the method for producing a product, the sintered powder compact is composed of two surface layers made of the same sintered powder component and at a temperature at which the two surface layers are sintered to a relative density of 93% or more after sintering. A low-strain firing characterized by being adjusted to a sintered powder component when shrinkage or expansion during sintering is smaller than that of the two surface layers, and formed by an intermediate layer arranged between the two surface layers. In the low distortion sintered product in which the boundary between the sintered layers made of different components is diffusion-bonded by sintering, the sintered layers are two surface sintered layers and the two surface sintered layers. It consists of an intermediate sintered layer sandwiched between binder layers, Each layer 250 mesh or less of Sn powder, P-Fe powder, and Pb powder,
The rest is a sintered layer made of sintered powder compact made of electrolytic copper of 200 mesh or less, and the relative density after sintering is densified to 93% or more. The layers are
Sintered from a sintered powder compact consisting of Cu powder of 250 mesh or less, Sn powder, P-Fe powder, and the rest of Fe powder of 100 mesh or less, respectively, and shrinkage at the time of sintering of the two surface sintered layers or The object can be achieved by using a low strain sintered product which is a sintered layer containing iron as a main component and adjusted to have a component smaller than expansion.
（作用） 低歪焼結品の製造方法は、同一の焼結粉末成分からな
る二つの表面層と、この二つの表面層の焼結後の相対密
度が93％以上に焼結する温度においては、前記二つの表
面層よりも焼結時における収縮が小さい焼結粉末成分に
調整され、かつ前記二つの表面層間に配置された中間層
とにより形成された焼結粉末成形体を焼結すると、二つ
の表面層は焼結後の相対密度が93％以上に緻密化された
焼結層となるが、このように焼結により高密度化される
成分は、その収縮量も多いため大きく変形し易い。(Function) The method for producing a low strain sintered product is such that two surface layers made of the same sintered powder component and a temperature at which the relative density after sintering of these two surface layers are 93% or more are sintered. A sintered powder component whose shrinkage during sintering is smaller than those of the two surface layers is adjusted, and when a sintered powder compact formed by an intermediate layer arranged between the two surface layers is sintered, The two surface layers are sintered layers that have been densified to a relative density of 93% or more after sintering, but the components that are densified by sintering in this way are greatly deformed because of the large amount of shrinkage. easy.
しかし、前記二つの表面層間には、同じ焼結温度にお
いては寸法変化が少なく調整された他の成分よりなる中
間層が隣接して配置されており、焼結時に前記二つの表
面層と中間層とが拡散接合されるため、中間層の両面に
拡散接合された同一成分からなる二つの表面層の変形が
均等に抑制される。従って、中間層は二つの表面層の収
縮を抑制するだけでなく、焼結後の焼結品の平面度を向
上させる。なお、異種成分のうち焼結によって高密度化
される成分の変形が大きく、これに隣接する他方の成分
の変形が大きく、これに隣接する他方の成分によって、
その変形量を抑制すると、高密度化される成分にクラッ
クが入ることがある。この場合には、焼結温度を少し低
めに調整し、予備焼結した後、サイジング、コイニング
等の再加圧処理を施した後、本焼結を行えば、マイクロ
クラックの発生を防止できる。However, between the two surface layers, an intermediate layer composed of another component whose dimensional change is adjusted to be small at the same sintering temperature is adjacently arranged, and the two surface layers and the intermediate layer are arranged at the time of sintering. Since and are diffusion-bonded, the deformation of the two surface layers made of the same component and diffusion-bonded to both surfaces of the intermediate layer is uniformly suppressed. Therefore, the intermediate layer not only suppresses the contraction of the two surface layers, but also improves the flatness of the sintered product after sintering. Note that among the different kinds of components, the component that is densified by sintering has a large deformation, and the other component adjacent to this has a large deformation, and the other component adjacent to this has a large deformation.
If the amount of deformation is suppressed, cracks may occur in the densified component. In this case, if the sintering temperature is adjusted to be slightly lower, pre-sintering is performed, then re-pressurizing treatment such as sizing and coining is performed, and then main sintering is performed, generation of microcracks can be prevented.
低歪焼結品は、三層の焼結層を形成する、二つの表面
焼結層は銅を主成分とし、焼結温度において相対密度が
93％以上に緻密化された焼結層であるため耐摩耗性の高
い性質を有し、かつ、各焼結粉末を所望の粒径に選定し
たため、焼結され易く二つの表面焼結層に挟まれた中間
焼結層が、焼結時における収縮または膨張が表面焼結層
より小さい成分に調整された焼結層であっても、これら
各焼結層間の境界は焼結時の拡散により確実に接合され
ているため、剥離することがない。The low strain sintered product forms three sintered layers.The two surface sintered layers have copper as the main component and the relative density at the sintering temperature is
Since it is a sintered layer that is densified to 93% or more, it has high wear resistance, and because each sintered powder is selected to have a desired particle size, it is easily sintered and formed into two surface sintered layers. Even if the sandwiched intermediate sintered layer is a sintered layer whose shrinkage or expansion during sintering is adjusted to a component smaller than that of the surface sintered layer, the boundaries between these sintered layers are Since it is securely bonded, it does not peel off.
（実施例） 以下、添付図面を参照して本発明の実施例を詳述す
る。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.
第１図は、ブルドーザやパワーショベル等建設機械の
差動遊星歯車式終減速機に使用されるスラストリングで
あり、表面層にはCu−Sn青銅系焼結材１を、又中間層に
はFe−Cu−Ｐ−Sn鉄系焼結材２を用いた構成から成って
いる。前記Cu−Sn青銅系焼結材１用の混合粉末は、250
メッシュ以下のSn粉を11重量％、又Ｐが0.8重量％とな
るように250メッシュ以下のＰ−Fe粉（Fe−27重量％
Ｐ、および250メッシュ以下のPb粉を３重量％、残りが2
00メッシュ以下の電解銅から成る混合粉に、0.05重量％
のケロシンを添加し、十分均一になるように混合した。
又、鉄系焼結材２用の混合粉末は前記Cu、Sn、Ｐ−Fe粉
を用いてCuが15重量％、Snが３重量％になるようにＰ−
Fe粉を、そして残りが100メッシュ以下のFe粉から成る
混合物に0.05重量％のケロシンを添加し、十分均一にな
るように混合した。成形は、金型の下パンチをダイ上面
から2.5mm下げた状態で前記Cu−Sn青銅系混合粉末を充
填した後、下パンチをさらに5mm下げて、前記Fe系混合
粉末を充填し、再度下パンチを2.5mm下げて、前記Cu−S
n青銅系混合粉末を充填した後、面圧4.0ton/cm2でプレ
ス成形した。その後、前記成形体をAXガス雰囲気炉中で
880℃で、45分間焼結処理した。焼結後の真円度は内径8
0mmφに対して0.05mm、そりは0.08mmと極めて良く、寸
法修正無しで使用できた。尚、表面層の焼結後の相対密
度も96％以上に向上しており、三層構造の焼結体の引張
強度も32kg/mm2であり、十分実用できる品質が得られ
た。Fig. 1 shows a thrust ring used in differential planetary gear type final reduction gears for construction machines such as bulldozers and power shovels. Cu-Sn bronze-based sintered material 1 is used for the surface layer and intermediate layer is used. The Fe-Cu-P-Sn iron-based sintered material 2 is used. The mixed powder for the Cu-Sn bronze-based sintered material 1 is 250
11 wt% Sn powder below mesh and P-Fe powder below 250 mesh (Fe-27 wt% so that P is 0.8 wt%)
P and 3% by weight of Pb powder of 250 mesh or less, the rest is 2
0.05% by weight to powder mixture of electrolytic copper of 00 mesh or less
Kerosene was added and mixed to be sufficiently uniform.
As the mixed powder for the iron-based sintered material 2, the Cu, Sn, and P-Fe powders are used so that the Cu content is 15% by weight and the Sn content is 3% by weight.
Fe powder and 0.05 wt% kerosene were added to a mixture consisting of 100 mesh or less of Fe powder and mixed until well homogenous. Molding is performed by filling the Cu-Sn bronze-based mixed powder in a state where the lower punch of the die is lowered from the die upper surface by 2.5 mm, then lowering the lower punch further by 5 mm, filling the Fe-based mixed powder, and lowering again. Lower the punch by 2.5 mm to remove the Cu-S
After being filled with a bronze-based mixed powder, press molding was performed at a surface pressure of 4.0 ton / cm 2 . Then, the molded body is placed in an AX gas atmosphere furnace.
It was sintered at 880 ° C. for 45 minutes. Roundness after sintering is 8 inside diameter
0.05mm against 0mm φ, the sled is very well with 0.08mm, it could be used without the size modification. The relative density of the surface layer after sintering was improved to 96% or more, and the tensile strength of the three-layer structure sintered body was 32 kg / mm 2 , which was a sufficiently practical quality.
（発明の効果） 以上詳述した如く、本発明によるときは次の効果を奏
する。(Effects of the Invention) As described in detail above, according to the present invention, the following effects are obtained.
（１）一般の摺動材には高価な銅系材料が使われている
が、本発明では摺動部以外の部分を焼結時に変形の少な
い、しかも安価な鉄系材等にすることによって、焼結時
の変形が少なくなり焼結品の平面度および真円度が向上
して、寸法精度および寸法のばらつきが少なくなるため
無加工で製品に使用できると共に、剛性および引張強度
の高い、しかも安価な低歪焼結品が得られる。(1) Although an expensive copper-based material is used as a general sliding material, in the present invention, a portion other than the sliding portion is made of an iron-based material or the like that is less likely to be deformed during sintering and is inexpensive. , The deformation at the time of sintering is reduced, the flatness and roundness of the sintered product are improved, and the dimensional accuracy and dimensional variation are reduced, so it can be used for products without processing, and has high rigidity and tensile strength. Moreover, an inexpensive low distortion sintered product can be obtained.
（２）今後、液相焼結技術を用いた高密度、高強度材の
開発が進む中で、液相焼結の最大の欠点である寸法精度
の問題を、本発明によって解決できるので、極めて有益
な材料を提供でき、産業の発展に寄与するところ大であ
る。(2) While the development of high-density and high-strength materials using liquid phase sintering technology will progress in the future, the present invention can solve the problem of dimensional accuracy, which is the biggest drawback of liquid phase sintering. It is a great place to provide useful materials and contribute to the development of the industry.
第１図は本発明の実施例を示す図である。 １……青銅系焼結材,2……鉄系焼結材 FIG. 1 is a diagram showing an embodiment of the present invention. 1 ... Bronze-based sintered material, 2 ... Iron-based sintered material
Claims (2)
焼結する低歪焼結品の製造方法において、前記焼結粉末
成形層は、同一の焼結粉末成分からなる二つの表面層
と、この二つの表面層が焼結後の相対密度93％以上に焼
結する温度においては、前記二つの表面層より焼結時に
おける収縮または膨張が小さい焼結粉末成分に調整され
ると共に、前記二つの表面層間に配置される中間層とに
より形成されることを特徴とする低歪焼結品の製造方
法。1. A method for producing a low-strain sintered product in which sintered powder compact layers composed of different components are stacked and sintered, wherein the sintered powder compact layers are two surface layers made of the same sintered powder component. And, at a temperature at which the two surface layers are sintered to a relative density of 93% or more after sintering, the shrinkage or expansion during sintering is adjusted to be a sintering powder component smaller than that of the two surface layers, and A method for producing a low strain sintered product, which is formed by an intermediate layer disposed between the two surface layers.
により拡散接合された低歪焼結品において、前記各焼結
層は二つの表面焼結層とこの二つの表面焼結層間に挟ま
れた中間焼結層とからなり、前記二つの表面焼結層はそ
れぞれ250メッシュ以下のSn粉、Ｐ−Fe粉、およびPb
粉、残りが200メッシュ以下の電解銅から成る焼結粉末
成形体から焼結され、焼結後の相対密度が93％以上に緻
密化された銅を主成分とする焼結層であり、中間焼結層
は、それぞれ250メッシュ以下のCu粉、Sn粉、Ｐ−Fe
粉、残りが100メッシュ以下のFe粉から成る焼結粉末成
形体から焼結され、前記二つの表面焼結層の焼結時にお
ける収縮または膨張より小さい成分に調整された鉄を主
成分とする焼結層であることを特徴とする低歪焼結品。2. A low strain sintered product in which the boundaries between the respective sintered layers composed of different components are diffusion-bonded by sintering, wherein each of the sintered layers comprises two surface sintered layers and the two surface sintered layers. And an intermediate sintered layer sandwiched between the two surface sintered layers, each of the two surface sintered layers being Sn powder, P-Fe powder, and Pb having a mesh size of 250 mesh or less.
Sintered from a sintered powder compact consisting of powder, the rest of which is less than 200 mesh electrolytic copper, and the relative density after sintering is a sintered layer composed mainly of copper densified to 93% or more. Sintered layers are Cu powder, Sn powder, P-Fe of 250 mesh or less, respectively.
Powder, the rest is sintered from a sintered powder compact consisting of Fe powder of 100 mesh or less, and the main component is iron adjusted to a component smaller than contraction or expansion during sintering of the two surface sintered layers A low strain sintered product characterized by being a sintered layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63216138A JP2561517B2 (en) | 1988-08-30 | 1988-08-30 | Sintered product manufacturing method and sintered product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63216138A JP2561517B2 (en) | 1988-08-30 | 1988-08-30 | Sintered product manufacturing method and sintered product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0266106A JPH0266106A (en) | 1990-03-06 |
| JP2561517B2 true JP2561517B2 (en) | 1996-12-11 |
Family
ID=16683864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63216138A Expired - Lifetime JP2561517B2 (en) | 1988-08-30 | 1988-08-30 | Sintered product manufacturing method and sintered product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561517B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5304974B1 (en) | 2012-03-27 | 2013-10-02 | 千住金属工業株式会社 | Sliding member |
| CN104755199B (en) * | 2012-10-25 | 2017-09-26 | 千住金属工业株式会社 | The manufacture method of sliding component and sliding component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5368605A (en) * | 1976-12-01 | 1978-06-19 | Kentarou Takahashi | Composite molded valve seat |
-
1988
- 1988-08-30 JP JP63216138A patent/JP2561517B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0266106A (en) | 1990-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4499048A (en) | Method of consolidating a metallic body | |
| US4499049A (en) | Method of consolidating a metallic or ceramic body | |
| US3992202A (en) | Method for producing aperture-containing powder-metallurgy article | |
| US4632074A (en) | Wear-resistant member for use in internal combustion engine and method for producing the same | |
| US5453242A (en) | Process for producing sintered-iron molded parts with pore-free zones | |
| US2299192A (en) | Method of making sintered articles | |
| US4137106A (en) | Super hard metal roll assembly and production thereof | |
| US3359623A (en) | Method for making refractory metal contacts having integral welding surfaces thereon | |
| US4721598A (en) | Powder metal composite and method of its manufacture | |
| JP2017008939A (en) | Manufacturing method of valve seat ring | |
| US8133329B2 (en) | Selective sintering of compacted components | |
| JP2561517B2 (en) | Sintered product manufacturing method and sintered product | |
| EP0014071B1 (en) | Powder metallurgical articles and method of forming same and of bonding the articles to ferrous base materials | |
| JP2849710B2 (en) | Powder forming method of titanium alloy | |
| JPH0354189B2 (en) | ||
| JP2016141815A (en) | Sliding member and manufacturing method therefor | |
| EP0097027A2 (en) | Densification of selected areas of powder metal parts | |
| US3724050A (en) | Method of making beryllium shapes from powder metal | |
| EP0533745B1 (en) | Method of manufacturing compound products | |
| JPH0359122B2 (en) | ||
| JPS5853684B2 (en) | Method for manufacturing sintered products made of different powder materials | |
| JPS6314806A (en) | Production of wear-resistant member | |
| JPH07242916A (en) | Production of sintered body | |
| JP2942839B2 (en) | Two-layer sintered seal ring and method of manufacturing the same | |
| SU872028A1 (en) | Metallic powder pressing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080919 Year of fee payment: 12 |
|
| EXPY | Cancellation because of completion of term |