JP6862161B2 - Fluid nozzle - Google Patents
Fluid nozzle Download PDFInfo
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- JP6862161B2 JP6862161B2 JP2016236951A JP2016236951A JP6862161B2 JP 6862161 B2 JP6862161 B2 JP 6862161B2 JP 2016236951 A JP2016236951 A JP 2016236951A JP 2016236951 A JP2016236951 A JP 2016236951A JP 6862161 B2 JP6862161 B2 JP 6862161B2
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- 239000012530 fluid Substances 0.000 title claims description 27
- 239000010410 layer Substances 0.000 claims description 48
- 229910052751 metal Inorganic materials 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 42
- 239000002344 surface layer Substances 0.000 claims description 40
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 description 13
- 238000005452 bending Methods 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 9
- 229910017052 cobalt Inorganic materials 0.000 description 7
- 239000010941 cobalt Substances 0.000 description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910009043 WC-Co Inorganic materials 0.000 description 3
- 230000002742 anti-folding effect Effects 0.000 description 3
- 238000005219 brazing Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004453 electron probe microanalysis Methods 0.000 description 2
- -1 WC-Co Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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Description
本発明は、超硬合金とバインダレス超硬合金との接合体に関し、特にその接合体を用いた流体用ノズルに関する。 The present invention related to the joined body of the cemented carbide and binderless cemented carbide, in particular to a fluid nozzle with the conjugate.
周期律表IVａ、Vａ、VIａ族金属の炭化物相をＦｅ、Ｃｏ、Ｎｉなどの金属相で結合した超硬合金は、耐摩耗性、耐熱・耐食性に優れ、また靱性もセラミックスに比べて高いことなどから、切削用工具をはじめ、ロール、ノズル、土木建設用工具など多くの産業分野に応用されている。代表的な超硬合金はＷＣ−Ｃｏ系であり、これは炭化タングステン（ＷＣ）相を基とし、コバルト（Ｃｏ）相やニッケル（Ｎｉ）相を金属相として含む。 Cemented carbide in which the carbide phases of Group IVa, Va, and VIa metals are bonded with a metal phase such as Fe, Co, and Ni has excellent wear resistance, heat resistance, and corrosion resistance, and has higher toughness than ceramics. Therefore, it is applied to many industrial fields such as cutting tools, rolls, nozzles, and civil engineering construction tools. A typical cemented carbide is a WC-Co type, which is based on a tungsten carbide (WC) phase and contains a cobalt (Co) phase and a nickel (Ni) phase as a metal phase.
一方、近年では、金属相を含まない超硬合金、すなわちバインダレス超硬合金も開発されている。このバインダレス超硬合金は、ＷＣ−Ｃｏ系のような一般的な超硬合金では得られなかった、優れた硬さ、耐食性、耐酸化性を有することから、より高い耐摩耗性や耐食性が要求される技術分野、例えばカメラ用レンズ成形用金型、レーザー照射装置のマスク材、核融合炉の炉壁材などへの応用が期待されている。 On the other hand, in recent years, cemented carbides that do not contain a metal phase, that is, binderless cemented carbides have also been developed. This binderless cemented carbide has excellent hardness, corrosion resistance, and oxidation resistance, which cannot be obtained with general cemented carbides such as WC-Co, and therefore has higher wear resistance and corrosion resistance. It is expected to be applied to required technical fields such as molds for forming lenses for cameras, mask materials for laser irradiation devices, and furnace wall materials for cemented carbide furnaces.
ただし、バインダレス超硬合金は金属相を含まないことからセラミックスと似た性質を持ち、金属相を含む一般的な超硬合金に比べ抗折力（曲げ強度）に劣るので、バインダレス超硬合金単独での製品化には制約がある。すなわち、高い耐摩耗性と抗折力の両方が求められる用途には、抗折力不足のため適用が難しい。 However, since the binderless cemented carbide does not contain a metal phase, it has properties similar to those of ceramics and is inferior in bending force (bending strength) to general cemented carbide containing a metal phase. There are restrictions on the commercialization of alloys alone. That is, it is difficult to apply it to applications where both high wear resistance and anti-folding force are required due to insufficient anti-folding force.
この点、特許文献１には、セラミックスと超硬合金とを、Ａｌ、Ｃｕ、Ｎｉ等の金属からなる介在層を介して接合する技術が開示されている。しかし、この特許文献１の技術により得られる接合体では、セラミックスと超硬合金との接合部である介在層が金属よりなることから、その接合部が選択的に消耗し、また、接合強度も低くなるという問題があった。
In this regard,
本発明が解決しようとする課題は、接合部の選択的消耗を低減できるとともに接合強度を向上できる、超硬合金とバインダレス超硬合金との接合体を用いた流体用ノズルを提供することにある。 An object to be solved by the present invention is to provide a fluid nozzle using a cemented carbide of a cemented carbide and a binderless cemented carbide, which can reduce selective wear of the joint and improve the joint strength. is there.
本発明の流体用ノズルは、粒子を含む流体が通過する内孔を有するノズルヘッドを備える流体用ノズルであって、前記ノズルヘッドは、表面層と背面層とが中間層を介して接合されている接合体よりなり、前記表面層は、金属相を含有しないバインダレス超硬合金であり、前記背面層は、金属相を含有する超硬合金であり、前記中間層は、前記背面層の金属相と同一の金属相を、０質量％を超え前記背面層中の金属相の含有量未満の範囲で含有し、前記ノズルヘッドの内孔は、流体の入口側に大径部、流体の出口側に小径部を有すると共に、前記大径部から前記小径部へとすぼむ斜面部を有し、前記大径部及び前記斜面部を前記背面層で構成し、前記小径部のうち少なくとも流体の出口となる部分を前記表面層で構成していることを特徴とする。 The fluid nozzle of the present invention is a fluid nozzle including a nozzle head having an inner hole through which a fluid containing particles passes, and the nozzle head is formed by joining a front surface layer and a back surface layer via an intermediate layer. The surface layer is a binderless superhard alloy containing no metal phase, the back layer is a super hard alloy containing a metal phase, and the intermediate layer is a metal of the back layer. The same metal phase as the phase is contained in a range of more than 0% by mass and less than the content of the metal phase in the back layer, and the inner hole of the nozzle head has a large diameter portion on the inlet side of the fluid and the outlet of the fluid. It has a small-diameter portion on the side and a slope portion that dents from the large-diameter portion to the small-diameter portion. The large-diameter portion and the slope portion are composed of the back surface layer, and at least the fluid of the small-diameter portion. It is characterized in that the portion serving as the outlet of is composed of the surface layer.
本発明の接合体は、バインダレス超硬合金からなる表面層と超硬合金からなる背面層とが、前記背面層の金属相と同一の金属相を前記背面層中の金属相の含有量未満の範囲で含有する中間層を介して接合されてなる。これにより、接合部の選択的消耗を低減できるとともに接合強度を向上できる。 In the bonded body of the present invention, the surface layer made of binderless cemented carbide and the back layer made of cemented carbide have the same metal phase as the metal phase of the back layer, which is less than the content of the metal phase in the back layer. It is joined via an intermediate layer contained in the range of. As a result, the selective wear of the joint portion can be reduced and the joint strength can be improved.
また、本発明の接合体を、使用時の各層に掛かる摩擦力が表面層＞背面層であるように使用することで、本発明の接合体の特徴（利点）をいかんなく発揮することができる。 Further, by using the bonded body of the present invention so that the frictional force applied to each layer at the time of use is the surface layer> the back surface layer, the features (advantages) of the bonded body of the present invention can be fully exhibited. ..
本発明の好ましい実施形態において、表面層は、炭化タングステン相を８０質量％以上含有し、金属相を含有しないバインダレス超硬合金であり、背面層は金属相（典型的には、金属バインダである、コバルト相及び／又はニッケル相）を１質量％以上２０質量％以下含有し、炭化タングステン相以外の炭化物相の含有量が１０質量％以下（０を含む）であり、残部が炭化タングステン相からなる超硬合金であり、中間層は、金属相を、０質量％を超え背面層中の金属相の含有量未満の範囲で含有する。すなわち、この実施形態において中間層は、表面層を構成するバインダレス超硬合金と背面層を構成する超硬合金との中間的な組成を有するＷＣ−金属系の超硬合金になり得るので、接合部の選択的消耗を効果的に低減できるとともに接合強度を効果的に向上できる。 In a preferred embodiment of the present invention, the surface layer is a binderless cemented carbide containing 80% by mass or more of a tungsten carbide phase and no metal phase, and the back layer is a metal phase (typically, a metal binder). A certain cobalt phase and / or nickel phase) is contained in an amount of 1% by mass or more and 20% by mass or less, the content of a carbide phase other than the tungsten carbide phase is 10% by mass or less (including 0), and the balance is a tungsten carbide phase. It is a cemented carbide composed of, and the intermediate layer contains a metal phase in a range of more than 0% by mass and less than the content of the metal phase in the back layer. That is, in this embodiment, the intermediate layer can be a WC-metal cemented carbide having an intermediate composition between the binderless cemented carbide constituting the surface layer and the cemented carbide constituting the back surface layer. The selective wear of the joint can be effectively reduced and the joint strength can be effectively improved.
本発明の接合体において中間層の厚さは、接合部の選択的消耗を効果的に低減するとともに接合強度を効果的に向上する点から、５μｍ以上１０００μｍ以下であることが好ましく、１００μｍ以上５００μｍ以下であることがより好ましい。 In the bonded body of the present invention, the thickness of the intermediate layer is preferably 5 μm or more and 1000 μm or less, preferably 100 μm or more and 500 μm, from the viewpoint of effectively reducing the selective wear of the joint portion and effectively improving the bonding strength. It is more preferable that it is as follows.
また、本発明の接合体において表面層を構成するバインダレス超硬合金と背面層を構成する超硬合金との熱膨張係数差は、接合時や使用時の温度変化による両合金の膨張、収縮量の差により生じる内部応力を低減する点から、１．５×１０−６／Ｋ以下であることが好ましく、０．７×１０−６／Ｋ以下であることがより好ましい。 Further, in the bonded body of the present invention, the difference in the coefficient of thermal expansion between the binderless cemented carbide constituting the surface layer and the cemented carbide constituting the back surface layer is the expansion and contraction of both alloys due to temperature changes during bonding and use. From the viewpoint of reducing the internal stress caused by the difference in amount, it is preferably 1.5 × 10 -6 / K or less, and more preferably 0.7 × 10 -6 / K or less.
以上のような本発明の接合体は、表面層を構成するバインダレス超硬合金と背面層を構成する超硬合金とを拡散接合することによって得ることができる。すなわち、前記拡散接合により、背面層の金属相と同一の金属相を、０質量％を超え背面層中の金属相の含有量未満の範囲で含有する中間層、具体的には表面層を構成するバインダレス超硬合金と背面層を構成する超硬合金との中間的な組成であって金属相が傾斜組成を有する中間層が生成し、この中間層を介して表面層と背面層とが接合される。そして、拡散接合の温度や時間を調整することにより、中間層の厚さや組成を制御することができる。この拡散接合の温度は１０００℃以上１５００℃以下とすることが適当で、時間は１０分以上５時間以下とすることが好ましい。 The bonded body of the present invention as described above can be obtained by diffusion-bonding the binderless cemented carbide constituting the surface layer and the cemented carbide constituting the back surface layer. That is, the diffusion bonding constitutes an intermediate layer, specifically, a surface layer, which contains the same metal phase as the metal phase of the back layer in a range of more than 0% by mass and less than the content of the metal phase in the back layer. An intermediate layer having an intermediate composition between the binderless cemented carbide and the cemented carbide constituting the back surface layer and having an inclined composition of the metal phase is formed, and the surface layer and the back surface layer are formed through the intermediate layer. Be joined. Then, the thickness and composition of the intermediate layer can be controlled by adjusting the temperature and time of the diffusion bonding. The temperature of this diffusion bonding is preferably 1000 ° C. or higher and 1500 ° C. or lower, and the time is preferably 10 minutes or longer and 5 hours or lower.
また、本発明の接合体は、使用時の各層に掛かる摩擦力が、「表面層に掛かる摩擦力＞背面層に掛かる摩擦力」であるように使用することが好ましい。すなわち、本発明の接合体は、背面層（超硬合金）側に耐衝撃性や高強度が必要であり、表面層（バインダレス超硬合金）側に強い摩擦力が加わる用途に好適である。例えば、粒子を含む流体用のノズルに使用する場合には、流体を受け止め、ある程度の形状に流体を変形させる部分を背面層（超硬合金）側とし、流体中の粒子が圧力を高めた状態で摩擦する部分を表面層（バインダレス超硬合金）側とするような使用方法に適している。特に、流体中の粒子がセラミックスなどの硬質粒子である場合に、本発明の接合体は有効である。 Further, the bonded body of the present invention is preferably used so that the frictional force applied to each layer at the time of use is "friction force applied to the front surface layer> frictional force applied to the back surface layer". That is, the bonded body of the present invention is suitable for applications in which impact resistance and high strength are required on the back surface layer (cemented carbide) side and strong frictional force is applied to the surface layer (binderless cemented carbide) side. .. For example, when used for a nozzle for a fluid containing particles, the part that receives the fluid and deforms the fluid into a certain shape is on the back layer (cemented carbide) side, and the particles in the fluid increase the pressure. It is suitable for the usage method in which the part to be rubbed with is the surface layer (binderless cemented carbide) side. In particular, the bonded body of the present invention is effective when the particles in the fluid are hard particles such as ceramics.
以上の使用方法を例示する模式図を図７に示す。
図７（ａ）はノズルヘッドの模式図であり、上部から下部に向かい、流体が動くことを想定している。この図中で、内径が広い部分から狭い部分へとすぼむ斜面部分は、耐衝撃性や高強度が必要であり、前記背面層に該当する。また、流体と壁面との間で強い摩擦を生じるのは、下部の狭い部分であり、この部分は前記表面層に該当する（図７で中間層は省略している）。図７（ａ）では、内径が狭い部分全体をバインダレス超硬合金からなる表面層、内径が広い部分から傾斜部分までを超硬合金からなる背面層としているが、図７（ｂ）、（ｃ）に示すように、境界部分や中間層は必ずしも図７（ａ）に示す位置とする必要はなく、耐衝撃性や高強度が必要な部分を超硬合金とし、少なくとも流体の出口となる部分をバインダレス超硬合金とすればよい。
A schematic diagram illustrating the above usage is shown in FIG.
FIG. 7A is a schematic view of the nozzle head, and it is assumed that the fluid moves from the upper part to the lower part. In this figure, the slope portion that is recessed from the portion having an inner diameter to the portion having an inner diameter is required to have impact resistance and high strength, and corresponds to the back surface layer. Further, it is the narrow portion of the lower portion that causes strong friction between the fluid and the wall surface, and this portion corresponds to the surface layer (the intermediate layer is omitted in FIG. 7). In FIG. 7A, the entire portion having a narrow inner diameter is a surface layer made of a binderless cemented carbide, and the portion from a portion having a large inner diameter to an inclined portion is a back layer made of a cemented carbide. As shown in c), the boundary portion and the intermediate layer do not necessarily have to be at the positions shown in FIG. 7 (a), and the portion requiring impact resistance and high strength is made of cemented carbide and at least serves as a fluid outlet. The part may be a binderless cemented carbide.
このような流体用のノズルのほか、本発明の接合体は、刃物（刃先が表面層（バインダレス超硬合金）側、母材が背面層（超硬合金）側）、摺動部品（摺動部が表面層（バインダレス超硬合金）側、母材が背面層（超硬合金）側）、噴射ノズル（ノズル先端部が表面層（バインダレス超硬合金）側、母材が背面層（超硬合金）側）などとして好適に使用できる。 In addition to such nozzles for fluids, the joints of the present invention include cutting tools (the cutting edge is on the surface layer (binderless cemented carbide) side, the base material is on the back layer (cemented carbide) side), and sliding parts (sliding). The moving part is on the surface layer (binderless cemented carbide) side, the base material is on the back layer (cemented carbide) side), the injection nozzle (the nozzle tip is on the surface layer (binderless cemented carbide) side, and the base material is the back layer. It can be suitably used as (cemented carbide) side).
本発明の実施例として、金属相を含まず炭化タングステン相の単相からなるバインダレス超硬合金と、金属相としてコバルト相を６．５質量％含むＷＣ−Ｃｏ系の超硬合金とを真空雰囲気下で１３００℃×９０ｍｉｎの条件で拡散接合して接合体（本発明品）を得た。また、比較例として、実施例と同じバインダレス超硬合金と超硬合金とをロウ付けにより接合して接合体（比較品）を得た。そして、本発明品及び比較品の各６個の試験片について、超硬工具協会規格「ＣＩＳ０２６Ｂ−２００７」に基づき、接合部を荷重点として抗折力試験を行い、抗折力を測定した。その結果を表１に示す。また、本発明品（６個の試験片）の抗折力試験後の外観を図１に示し、比較品（６個の試験片）の抗折力試験後の外観を図２に示す。また、本発明品の接合部近傍のＳＥＭ観察結果を図３に示し、本発明品の接合部近傍のコバルト相（金属相）の含有量をＥＰＭＡのライン分析により定量した結果を図４に示す。さらに、本発明品及び比較品の接合部近傍の硬さの変化を図５に示す。 As an example of the present invention, a binderless cemented carbide composed of a single phase of a tungsten carbide phase containing no metal phase and a WC-Co-based cemented carbide containing 6.5% by mass of a cobalt phase as a metal phase are vacuumed. A bonded body (the product of the present invention) was obtained by diffusion bonding under the condition of 1300 ° C. × 90 min in an atmosphere. Further, as a comparative example, the same binderless cemented carbide and cemented carbide as in the examples were joined by brazing to obtain a bonded body (comparative product). Then, each of the six test pieces of the product of the present invention and the comparative product was subjected to a bending force test with the joint as a load point based on the Cemented Carbide Tool Association standard "CIS026B-2007", and the bending force was measured. The results are shown in Table 1. Further, the appearance of the product of the present invention (6 test pieces) after the bending force test is shown in FIG. 1, and the appearance of the comparative product (6 test pieces) after the bending force test is shown in FIG. Further, the SEM observation result in the vicinity of the joint portion of the product of the present invention is shown in FIG. 3, and the result of quantifying the content of the cobalt phase (metal phase) in the vicinity of the joint portion of the product of the present invention by EPMA line analysis is shown in FIG. .. Further, FIG. 5 shows a change in hardness in the vicinity of the joint between the product of the present invention and the comparative product.
まず、図３を参照すると、本発明品においてバインダレス超硬合金と超硬合金とは拡散接合により生成した厚さ４００μｍ程度の中間層を介して接合されていることが確認された。また図４に示すように、この中間層（接合部）には、超硬合金の金属相と同一の金属相であるコバルト相が、超硬合金中の金属相（コバルト相）の含有量未満の範囲で含有されていることが確認された。すなわち、本発明品においてバインダレス超硬合金と超硬合金は、これらの中間的な組成を有する超硬合金からなる中間層を介して接合されていることが確認された。 First, referring to FIG. 3, it was confirmed that in the product of the present invention, the binderless cemented carbide and the cemented carbide are bonded via an intermediate layer having a thickness of about 400 μm generated by diffusion bonding. Further, as shown in FIG. 4, in this intermediate layer (joint portion), the cobalt phase, which is the same metal phase as the metal phase of the cemented carbide, is less than the content of the metal phase (cobalt phase) in the cemented carbide. It was confirmed that it was contained in the range of. That is, it was confirmed that the binderless cemented carbide and the cemented carbide in the product of the present invention are joined via an intermediate layer made of a cemented carbide having an intermediate composition between them.
さらに本発明品は、例えば特許文献１に示すような介在層を有さないために、図５に示すように接合部に起因する硬さの低下がない。一方、比較品においてはロウ付けによる接合部の硬さが低下しており、これを耐摩耗部材として用いると、接合部に摩耗が集中してしまいそれが部材寿命となってしまうため、超硬合金やバインダレス超硬合金の長所を活かせない。
Further, since the product of the present invention does not have an intervening layer as shown in
そして表１に示すように、本発明品の抗折力は比較品より大幅に高く、図１に示すように、抗折力試験において本発明品は、超硬合金より抗折力の低いバインダレス超硬合金側を基点に破壊しているものが多かった。すなわち、本発明品において中間層（接合部）の抗折力（強度）はバインダレス超硬合金より高く、バインダレス超硬合金と超硬合金とが十分な接合強度をもって接合されていることが確認された。 As shown in Table 1, the bending force of the product of the present invention is significantly higher than that of the comparative product, and as shown in FIG. 1, the product of the present invention has a lower bending force than the cemented carbide in the bending force test. Many of them were broken from the less cemented carbide side as the base point. That is, in the product of the present invention, the bending force (strength) of the intermediate layer (joint portion) is higher than that of the binderless cemented carbide, and the binderless cemented carbide and the cemented carbide are bonded with sufficient bonding strength. confirmed.
一方、比較品については、図２に示すように、抗折力試験においてロウ付けによる接合部を基点として破壊した。すなわち、比較品では、バインダレス超硬合金と超硬合金との接合強度が低く、この比較品はバインダレス超硬合金と超硬合金との接合部が選択的に消耗しやすいと言える。 On the other hand, as shown in FIG. 2, the comparative product was broken from the brazed joint as a base point in the bending force test. That is, in the comparative product, the joint strength between the binderless cemented carbide and the cemented carbide is low, and it can be said that the joint portion between the binderless cemented carbide and the cemented carbide is likely to be selectively consumed in this comparative product.
以上のとおり、本発明によれば、表面層（バインダレス超硬合金）と背面層（超硬合金）と接合部の選択的消耗を低減できるとともに接合強度を向上できることが確認された。 As described above, according to the present invention, it has been confirmed that the selective wear of the surface layer (binderless cemented carbide), the back layer (cemented carbide) and the joint portion can be reduced and the joint strength can be improved.
なお、本発明品で使用したバインダレス超硬合金と超硬合金の熱膨張係数は、それぞれ４．５×１０−６／Ｋと５．２×１０−６／Ｋであり、熱膨張係数差は０．７×１０−６／Ｋであった。このほかに本発明者らは、熱膨張係数が６．０×１０−６／Ｋの超硬合金と前記バインダレス超硬合金とを拡散接合することによっても、前記比較品に比べ、接合部分の選択的消耗を低減できるとともに接合強度を向上できることを確認している。 The thermal expansion coefficient of the binderless cemented carbide and the cemented carbide used in the present invention product are each 4.5 × 10 -6 / K and 5.2 × 10 -6 / K, the thermal expansion coefficient difference Was 0.7 × 10 -6 / K. In addition to this, the present inventors also by diffusion-bonding the cemented carbide having a coefficient of thermal expansion of 6.0 × 10 -6 / K and the binderless cemented carbide, as compared with the comparative product, the bonded portion. It has been confirmed that the selective wear of the material can be reduced and the bonding strength can be improved.
また、１３００℃×９０ｍｉｎの条件で拡散接合した本発明品における中間層の厚さは前述のとおり４００μｍ程度であったが、拡散接合の温度を１２００℃と低くすることにより、図６に示すように、中間層の厚さを１００μｍ程度に小さくすることができ、本発明者らは、この厚さ１００μｍ程度の中間層によっても前記本発明品と同等の特性が得られることを確認している。 Further, the thickness of the intermediate layer in the product of the present invention obtained by diffusion bonding under the condition of 1300 ° C. × 90 min was about 400 μm as described above, but by lowering the diffusion bonding temperature to 1200 ° C., as shown in FIG. In addition, the thickness of the intermediate layer can be reduced to about 100 μm, and the present inventors have confirmed that the intermediate layer having a thickness of about 100 μm can also obtain the same characteristics as the product of the present invention. ..
Claims (4)
前記ノズルヘッドは、表面層と背面層とが中間層を介して接合されている接合体よりなり、
前記表面層は、金属相を含有しないバインダレス超硬合金であり、
前記背面層は、金属相を含有する超硬合金であり、
前記中間層は、前記背面層の金属相と同一の金属相を、０質量％を超え前記背面層中の金属相の含有量未満の範囲で含有し、
前記ノズルヘッドの内孔は、流体の入口側に大径部、流体の出口側に小径部を有すると共に、前記大径部から前記小径部へとすぼむ斜面部を有し、
前記大径部及び前記斜面部を前記背面層で構成し、前記小径部のうち少なくとも流体の出口となる部分を前記表面層で構成している、流体用ノズル。 A fluid nozzle including a nozzle head having an inner hole through which a fluid containing particles passes.
The nozzle head is composed of a bonded body in which a front surface layer and a back surface layer are bonded via an intermediate layer.
The surface layer is a binderless cemented carbide that does not contain a metal phase.
The back layer is a cemented carbide containing a metal phase.
The intermediate layer contains the same metal phase as the metal phase of the back layer in a range of more than 0% by mass and less than the content of the metal phase in the back layer .
The inner hole of the nozzle head has a large-diameter portion on the inlet side of the fluid and a small-diameter portion on the outlet side of the fluid, and also has a slope portion that is recessed from the large-diameter portion to the small-diameter portion.
A fluid nozzle in which the large-diameter portion and the slope portion are formed of the back surface layer, and at least a portion of the small-diameter portion serving as a fluid outlet is formed of the surface layer .
前記背面層は、金属相を１質量％以上２０質量％以下含有し、炭化タングステン相以外の炭化物相の含有量が１０質量％以下（０を含む）であり、残部が炭化タングステン相からなる超硬合金であり、
前記中間層は、金属相を、０質量％を超え前記背面層中の金属相の含有量未満の範囲で含有する、請求項１に記載の流体用ノズル。 The surface layer is a binderless cemented carbide containing 80% by mass or more of a tungsten carbide phase and not containing a metal phase.
The back layer contains a metal phase of 1% by mass or more and 20% by mass or less, a carbide phase other than the tungsten carbide phase of 10% by mass or less (including 0), and the balance is a cemented carbide phase. It is a hard alloy
The fluid nozzle according to claim 1, wherein the intermediate layer contains a metal phase in a range of more than 0% by mass and less than the content of the metal phase in the back surface layer.
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| JP3512224B2 (en) * | 1994-01-14 | 2004-03-29 | 日立ツール株式会社 | Cemented carbide members with reduced resin adhesion |
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