JP2746945B2 - Composite lining material for cylinder - Google Patents
Composite lining material for cylinderInfo
- Publication number
- JP2746945B2 JP2746945B2 JP25303388A JP25303388A JP2746945B2 JP 2746945 B2 JP2746945 B2 JP 2746945B2 JP 25303388 A JP25303388 A JP 25303388A JP 25303388 A JP25303388 A JP 25303388A JP 2746945 B2 JP2746945 B2 JP 2746945B2
- Authority
- JP
- Japan
- Prior art keywords
- particles
- cylinder
- lining
- lining material
- alloy
- 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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプラスチック成形機、スラリーポンプ、及び
圧縮機等のシリンダ内周面に遠心鋳造法によりライニン
グするライニング材に関するものである。Description: TECHNICAL FIELD The present invention relates to a lining material for lining a cylinder inner peripheral surface of a plastic molding machine, a slurry pump, a compressor and the like by a centrifugal casting method.
プラスチック成形機用シリンダには樹脂又は樹脂に加
えた強化添加剤による腐食や摩耗を防止するために耐食
性と耐摩耗性が要求される。従来、耐食、耐摩耗性シリ
ンダとして鋼製シリンダ内周面にCoもしくはNi基合金を
遠心鋳造法によりライニングしたシリンダが使用されて
いた。しかし、これ等の合金をライニングしたシリンダ
は、ガラス繊維などの強化剤混入率の高いプラスチック
成形に使用された時、数ケ月程度の使用で摩耗による消
耗が大きく使用に耐えなくなる欠点があった。また、こ
の欠点を改善するためにNi合金中にWC粒子を分散させた
複合ライニング材もある。Corrosion resistance and abrasion resistance are required for a cylinder for a plastic molding machine in order to prevent corrosion and wear caused by a resin or a reinforcing additive added to the resin. Conventionally, a cylinder in which a Co or Ni-based alloy is lined on the inner peripheral surface of a steel cylinder by a centrifugal casting method has been used as a corrosion-resistant and wear-resistant cylinder. However, cylinders lined with these alloys have the drawback that when used in plastic molding with a high mixing ratio of reinforcing agents such as glass fibers, wear due to abrasion is large after several months of use, making them unusable. There is also a composite lining material in which WC particles are dispersed in a Ni alloy in order to improve this disadvantage.
しかしながら、この複合ライニング材は耐食、耐摩耗
性は向上したが次のような欠点がある。すなわち、耐摩
耗性強化材であるWCの比重はマトリックス合金に比べて
約２倍も大きいので、ライニング時に遠心力により比重
の大きなWC粒子がシリンダ母材側に寄せられ、WC粒子が
密集した層とWC粒子が微量或いは全く存在しない層とに
分離する。従って、ライニング後のシリンダ内周面に、
Ni基合金マトリックスに強化材のWC粒子を分散させた耐
食、耐摩耗性複合ライニング層を得るためには、シリン
ダ内周面側にあるWC粒子が微量或いは全く存在しない余
分な層を除去しなければならないという問題があった。
そして、WC粒子の存在しない層のみを除去することは困
難であり、完成したシリンダのライニング層にWC粒子が
微量或いは全く存在しない層がそのまま残り、所期の目
的である耐摩耗性を得ることができないという欠点があ
った。However, although this composite lining material has improved corrosion resistance and wear resistance, it has the following disadvantages. In other words, the specific gravity of WC, which is a wear-resistant reinforcing material, is about twice as large as that of the matrix alloy. Therefore, centrifugal force causes WC particles with a large specific gravity to move closer to the cylinder base material side during lining, resulting in a dense layer of WC particles. And a layer in which a small amount or no WC particles are present. Therefore, on the cylinder inner peripheral surface after lining,
In order to obtain a corrosion-resistant and wear-resistant composite lining layer in which WC particles of a reinforcing material are dispersed in a Ni-based alloy matrix, it is necessary to remove an extra layer in which a small amount or no WC particles are present on the inner peripheral surface side of the cylinder. There was a problem that had to be.
Then, it is difficult to remove only the layer without WC particles, and a layer containing a small amount or no WC particles remains in the lining layer of the completed cylinder to obtain the intended purpose of abrasion resistance. There was a disadvantage that it could not be done.
本発明の目的は上記のような欠点を解消しようとする
ものである。An object of the present invention is to eliminate the above-mentioned disadvantages.
本発明は上記目的を達成するために、シリンダ用複合
ライニング材において耐食性を有する金属をマトリック
スとして、同マトリックス中に耐摩耗性強化材としてWC
粒子に加えNbC粒子を添加したことを特徴とするもので
ある。遠心鋳造後のライニング層は、CoもしくはNi基マ
トリックス中に、母材側には比重の大きいWC粒子が、内
周表面側にはNiおよびCo基マトリックスと比重がほぼ同
じNbC粒子が分散し、ライニング層全域にわたり強化材
が分散される。すなわち、本発明のシリンダ用複合ライ
ニング材は、化学成分が重量比でCr5〜10％、B2.5〜４
％、Si0.2〜２％、Mn0.2〜２％、残部Co及び不可避的不
純物からなるCo基合金もしくは、Cr5〜10％、B2.5〜４
％、Si2.5〜10％、Co5〜40％、残部Ni及び不可避的不純
物からなるNi基合金中に耐摩耗性強化材としてWC粒子を
重量比で10〜30％、NbC粒子を５〜25％分散させてなる
合金を用い、遠心鋳造法によりライニングすることを特
徴とするライニング材である。In order to achieve the above object, the present invention provides a composite lining material for cylinders in which a metal having corrosion resistance is used as a matrix, and a WC is used as a wear-resistant reinforcing material in the matrix.
The present invention is characterized in that NbC particles are added in addition to the particles. In the lining layer after centrifugal casting, WC particles having a large specific gravity are dispersed in the Co or Ni-based matrix on the base material side, and NbC particles having substantially the same specific gravity as the Ni and Co-based matrix are dispersed on the inner peripheral surface side, The reinforcement is dispersed throughout the lining layer. That is, in the composite lining material for a cylinder of the present invention, the chemical components are 5 to 10% by weight of Cr and 2.5 to 4% by weight of the chemical components.
%, Si 0.2-2%, Mn 0.2-2%, Co-based alloy consisting of Co and unavoidable impurities or Cr 5-10%, B2.5-4
%, 2.5 to 10% of Si, 5 to 40% of Co, and 10 to 30% by weight of WC particles and 5 to 25% of NbC particles as a wear-resistant reinforcing material in a Ni-based alloy comprising Ni and unavoidable impurities. This is a lining material characterized by being lined by a centrifugal casting method using an alloy having a% dispersion.
耐摩耗性強化材であるWCの硬さはHv約2400であり比重
は15.5〜15.6である。また、NbCは硬さHv約2400でWCと
ほぼ同じであり、その比重は7.7〜7.8である。なお、本
発明の複合ライニング材マトリックスは従来から用いら
れているCo−Cr−Ｂ系およびNi−Co−Cr−Si−Ｂ系の合
金であり、それぞれ特公昭51−7126号公報及び特公昭56
−53626号公報に記載されている成分のものである。The hardness of WC, which is an abrasion-resistant reinforcing material, is about 2400 Hv, and the specific gravity is 15.5-15.6. NbC has a hardness Hv of about 2400 and is almost the same as WC, and its specific gravity is 7.7 to 7.8. The composite lining material matrix of the present invention is a conventionally used Co-Cr-B-based or Ni-Co-Cr-Si-B-based alloy, which is disclosed in JP-B-51-7126 and JP-B-56-76, respectively.
It is a component described in -53626.
上記のように本発明に係る複合ライニング材を遠心鋳
造法によって鋼製シリンダ内周面にライニングしたシリ
ンダは、ライニング層の母材側は主に比重の大きなWC粒
子が、内周表面側は主にNiもしくはCo基マトリックスと
ほぼ比重の等しいNbC粒子がそれぞれ分散しているの
で、ライニング後にライニング層を窒化ホウ素系の工具
を用いて所望の内径寸法に切削および研削を行うだけ
で、NbCとWCの二層の強化材が分散したシリンダを得る
ことができる。このシリンダ用複合ライニング材は、内
周表面のNbCの層が摩耗しても母材側にWCの層を有する
ため耐摩耗性に優れる。As described above, in the cylinder in which the composite lining material according to the present invention is lined on the inner peripheral surface of the steel cylinder by centrifugal casting, the base material side of the lining layer mainly contains WC particles having a large specific gravity, and the inner peripheral surface side mainly contains WC particles. Since the NbC particles having substantially the same specific gravity as the Ni or Co-based matrix are dispersed, the lining layer is simply cut and ground to a desired inner diameter using a boron nitride-based tool after lining, and NbC and WC are obtained. A cylinder in which two layers of reinforcing material are dispersed can be obtained. This composite lining material for cylinders has excellent wear resistance because it has a WC layer on the base material side even if the NbC layer on the inner peripheral surface is worn.
第１表にて示すように重量比でCr7.5％、B3.0％、Si
0.8％、Mn1.0％残部が実質的にCoからなるマトリックス
材と、Cr7.5％、B3.0％、Si2.5％、Mn1.0％、Co10％残
部が実質的にNiからなるマトリックス材のそれぞれに、
WC粒子を重量比で25％、NbC粒子を10％配合したものを
高周波誘導炉で溶解して合金をつくり、これを冷却して
5mm以下の小片に粉砕した。この粉砕した合金材をそれ
ぞれ外径165mm、内径70mmのSCM440製シリンダの中に片
肉3mmのライニング層を得るための必要量を封入した
後、加熱炉で1200℃まで加熱し30分間保持した。この後
シリンダを加熱炉から取り出し、直ちに遠心鋳造機に組
込みシリンダに1510rpmの回転を与えた。次いで、シリ
ンダを700℃まで回転しながら冷却した後に遠心鋳造機
から取外し、珪藻土中で48時間徐冷し、その後空気中で
放冷した。As shown in Table 1, Cr7.5%, B3.0%, Si
Matrix material consisting of 0.8%, Mn1.0% balance substantially Co and Cr7.5%, B3.0%, Si2.5%, Mn1.0%, Co10% balance Ni matrix For each of the materials,
An alloy made by blending 25% by weight of WC particles and 10% of NbC particles in a high-frequency induction furnace to cool the alloy
It was crushed into small pieces of 5 mm or less. The pulverized alloy material was sealed in a cylinder made of SCM440 having an outer diameter of 165 mm and an inner diameter of 70 mm to obtain a lining layer having a thickness of 3 mm, and then heated to 1200 ° C. in a heating furnace and held for 30 minutes. Thereafter, the cylinder was taken out of the heating furnace, immediately incorporated into a centrifugal casting machine, and the cylinder was rotated at 1510 rpm. Next, the cylinder was cooled to 700 ° C. while rotating, and then removed from the centrifugal casting machine, gradually cooled in diatomaceous earth for 48 hours, and then allowed to cool in air.
それぞれのシリンダからリング試料を採取しライニン
グ層の状態を調査した。その結果両方のシリンダともラ
イニング層は片肉3.1〜3.3mmの厚さでSCM440製シリンダ
内周面に拡散溶着しており、CoおよびNiマトリックス中
に母材側には主にWC粒子が、内周表面側には主にNbC粒
子が分散していることがわかった。またライニング層の
最内径部から1.5mm外層位置での硬さは、Co基がHRC60〜
61、Ni基がHRC62〜63であった。Ring samples were taken from each cylinder and the condition of the lining layer was investigated. As a result, in both cylinders, the lining layer has a thickness of 3.1 to 3.3 mm on one side and is diffusion-welded to the inner peripheral surface of the SCM440 cylinder, and the WC particles are mainly contained on the base material side in the Co and Ni matrix, It was found that NbC particles were mainly dispersed on the peripheral surface side. In addition, the hardness of the lining layer at the outer layer position 1.5 mm from the innermost
61, Ni group was HRC 62-63.
次いで、第１表に示すように、本発明に係る複合ライ
ニング材及び従来のCo基合金のライニング材についてラ
イニング後のシリンダからそれぞれ試料を採取して摩耗
試験を行った。Next, as shown in Table 1, samples were taken from the cylinders after lining for the composite lining material according to the present invention and the conventional lining material of the Co-based alloy, and a wear test was performed.
摩耗試験： 10mm×15mm×高さ10mmの各試料（試料番号1,2,3）
を、粒度800番のSiCを主成分をするφ200の研摩紙に2.5
kgの荷重で押しつけた状態で研摩紙を回転させた。研摩
紙は560rpmの速度で回転し、試験時間は３分間とした。
各試料の摩耗量は重量減によって測定した。第１図は各
試料の摩耗試験結果を示したものであり、同図において
本発明の複合ライニング材（試料番号2,3）は、従来の
合金ライニング材（試料番号１）に対し10倍近い耐摩耗
性を示している。Abrasion test: Each sample of 10mm x 15mm x 10mm height (Sample Nos. 1, 2, 3)
To a φ200 abrasive paper whose main component is SiC with a grain size of 800.
The abrasive paper was rotated while being pressed with a load of kg. The abrasive paper was rotated at a speed of 560 rpm, and the test time was 3 minutes.
The amount of wear of each sample was measured by weight loss. FIG. 1 shows the results of the wear test of each sample. In FIG. 1, the composite lining material of the present invention (sample Nos. 2 and 3) is nearly 10 times that of the conventional alloy lining material (sample No. 1). Shows abrasion resistance.
〔発明の効果〕 以上に説明したように、本発明に係るシリンダ用複合
ライニング材においては、耐食性を有するCoもしくはNi
基合金をマトリックスとし、このマトリックス中に耐摩
耗性強化材としてWC粒子およびNbC粒子を重量比でそれ
ぞれ10〜30％、５〜25％分散させたことにより、耐食性
に加え耐摩耗性を従来のシリンダ材に比べて数倍向上さ
せることができ、シリンダの寿命が長くなり経済的であ
る。 [Effect of the Invention] As described above, in the composite lining material for a cylinder according to the present invention, Co or Ni having corrosion resistance is used.
The base alloy is used as a matrix, and WC particles and NbC particles are dispersed in this matrix by 10 to 30% and 5 to 25% by weight, respectively, as abrasion resistance reinforcing material. It can be improved several times as compared with the cylinder material, and the life of the cylinder is extended, which is economical.
また、従来のNi基マトリックス中にWC粒子を分散させ
たシリンダライニング材において問題となったWC粒子の
密集した層とWC粒子が微量或いは全く存在しない層との
分離についても、本発明ではNbC粒子５〜25％添加する
ことによりライニング層の母材側には主にWC粒子が、内
周表面側には主にNbC粒子がそれぞれ分散し、ライニン
グ層全体にわたって耐食、耐摩耗性のすぐれたシリンダ
が得られるようになった。Further, the separation of a dense layer of WC particles and a layer in which a small amount or no WC particles are present, which is a problem in a cylinder lining material in which WC particles are dispersed in a conventional Ni-based matrix, is also described in the present invention. By adding 5 to 25%, WC particles mainly disperse on the base material side of the lining layer and NbC particles mainly disperse on the inner peripheral surface side, and a cylinder with excellent corrosion resistance and wear resistance over the entire lining layer Can be obtained.
第１図は本発明実施例のライニング層ならびに従来のラ
イニング層から採取した試料の摩耗試験結果を示す図で
ある。FIG. 1 is a view showing the results of abrasion tests of samples taken from the lining layer of the embodiment of the present invention and the conventional lining layer.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ２２Ｃ 32/00 Ｃ２２Ｃ 32/00 Ｐ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C22C 32/00 C22C 32/00 P
Claims (2)
％、Si0.2〜２％、Mn0.2〜２％、残部Co及び不可避的不
純物からなる耐食性を有するCo基合金中に耐摩耗性強化
材としてWC粒子を重量比で10〜30％、NbC粒子を５〜25
％分散させてなる合金を用い、遠心鋳造法によりライニ
ングすることを特徴とするシリンダ用複合ライニング
材。1. A chemical composition comprising 5 to 10% Cr and 2.5 to 4% by weight.
%, 0.2 to 2% of Si, 0.2 to 2% of Mn, balance of Co and 10% to 30% by weight of WC particles as a wear-resistant reinforcement in a Co-based alloy having corrosion resistance consisting of Co and inevitable impurities. 5-25 particles
A composite lining material for cylinders, characterized in that the lining is made by centrifugal casting using an alloy having a% dispersion.
％、Si2.5〜10％、Co5〜40％、残部Ni及び不可避的不純
物からなる耐食性を有するNi基合金中に耐摩耗性強化材
としてWC粒子を重量比で10〜30％、NbC粒子を５〜25％
分散させてなる合金を用い、遠心鋳造法によりライニン
グすることを特徴とするシリンダ用複合ライニング材。2. A chemical composition comprising 5 to 10% by weight of Cr and 2.5 to 4% of B by weight.
%, Si 2.5 ~ 10%, Co 5 ~ 40%, Ni-based alloy with corrosion resistance consisting of balance Ni and unavoidable impurities, WC particles as abrasion resistance enhancer 10 ~ 30% by weight ratio, NbC particles 5-25%
A composite lining material for a cylinder, wherein the lining is formed by centrifugal casting using a dispersed alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25303388A JP2746945B2 (en) | 1988-10-07 | 1988-10-07 | Composite lining material for cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25303388A JP2746945B2 (en) | 1988-10-07 | 1988-10-07 | Composite lining material for cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02101139A JPH02101139A (en) | 1990-04-12 |
| JP2746945B2 true JP2746945B2 (en) | 1998-05-06 |
Family
ID=17245546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25303388A Expired - Lifetime JP2746945B2 (en) | 1988-10-07 | 1988-10-07 | Composite lining material for cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2746945B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5358897B2 (en) * | 2007-06-05 | 2013-12-04 | 日立金属株式会社 | Cylinder for molding machine |
| DE102007057588A1 (en) * | 2007-11-28 | 2009-06-04 | Daimler Ag | Engine block with cast-in cylinder liners of several material layers and method for producing the cylinder liners |
| JP6230156B2 (en) * | 2014-09-22 | 2017-11-15 | 株式会社日本製鋼所 | Lining material and cylinder for molding machine having the same |
| CN109967713A (en) * | 2019-04-08 | 2019-07-05 | 四川鑫鼎新材料有限公司 | A kind of nuclear screening multiple tube and preparation method thereof |
-
1988
- 1988-10-07 JP JP25303388A patent/JP2746945B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02101139A (en) | 1990-04-12 |
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