JPH10258390A - Hard mounting cemented carbide and production - Google Patents
Hard mounting cemented carbide and productionInfo
- Publication number
- JPH10258390A JPH10258390A JP9082311A JP8231197A JPH10258390A JP H10258390 A JPH10258390 A JP H10258390A JP 9082311 A JP9082311 A JP 9082311A JP 8231197 A JP8231197 A JP 8231197A JP H10258390 A JPH10258390 A JP H10258390A
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- welding
- alloy
- binding metal
- hardness
- 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.)
- Abandoned
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本願発明は肉盛用溶接棒に用いる
超硬合金及びその製造方法に係わる。より詳細には、鉱
山工具等の耐摩耗性が要求される工具の刃先近傍に肉盛
する硬装用溶接棒に用いる超硬合金に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cemented carbide used for a build-up welding rod and a method for producing the same. More specifically, the present invention relates to a cemented carbide used for a welding rod for hard mounting that is built up near the cutting edge of a tool such as a mine tool that requires wear resistance.
【０００２】[0002]
【従来の技術】硬装用溶接棒に関しては、大別して２種
類の超硬質材料が用いられている。１つは、Ｗ2Ｃ−Ｗ
Ｃ共晶合金で、他は超硬合金そのものである。Ｗ2Ｃ−
ＷＣ共晶合金は、その高硬度ゆえ、耐摩耗性が要求され
る箇所に適するが、製造に特別な高温処理を要するため
特殊な用途にしか用いられていない。超硬合金は、広く
実用化されている切削工具や耐摩用工具と同じ製法で製
造でき、軟鋼パイプ内に充填したかたちで溶接棒として
市販されており、硬さは上記共晶合金よりは低いが、耐
摩耗性を付与する用途に用いられている。2. Description of the Related Art There are roughly two types of super-hard materials used for hard welding rods. One is W 2 C-W
C is a eutectic alloy, and the others are cemented carbide itself. W 2 C-
The WC eutectic alloy is suitable for places where abrasion resistance is required due to its high hardness, but it is used only for special applications because a special high temperature treatment is required for production. Cemented carbides can be manufactured by the same manufacturing method as cutting tools and wear-resistant tools that are widely put into practical use, and are marketed as welding rods in a form filled in mild steel pipes.The hardness is lower than that of the above eutectic alloys Are used for imparting abrasion resistance.
【０００３】本願発明は後者の超硬合金を用いた硬装用
溶接棒に使用する超硬合金であり、、特開平６−２６９
９８７号に記載されているように、超硬合金を粒子状と
して用いた例、及び超硬合金を焼結棒又は半焼結棒とし
て用いた例がある。粒子として用いた場合には、その粒
の大きさ、充填量を調整することにより、硬装溶接後の
硬さを調整できるが、焼結棒又は半焼結棒として用いた
場合のほうがＷＣの含有量を高く高硬度な硬装ができる
と記載されている。[0003] The present invention relates to a cemented carbide used for a welding rod for hardening using the latter cemented carbide.
As described in No. 987, there is an example in which a cemented carbide is used in the form of particles, and an example in which a cemented carbide is used as a sintered rod or a semi-sintered rod. When used as particles, the hardness after hard welding can be adjusted by adjusting the size and filling amount of the particles, but the WC content is higher when used as a sintered or semi-sintered rod. It is described that a high amount of hard dress can be obtained.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、粒状、
棒状の如何を問わず、溶接後は超硬合金の粒子を軟鋼パ
イプ等のＦｅ系合金が包み込んだ状態となるため、その
境界の反応が十分に進まずに溶着せず、使用中に粒子そ
のものが脱落したり、また、溶接の熱の影響により超硬
合金中にＦｅ系合金が侵入し結合金属量が多くなるため
硬さが低下し、十分な耐摩耗性を付与できないという課
題があった。更に、半焼結棒を用いた場合には、半焼結
体自体が脆いため、粒の大きさが小さく成りすぎて硬さ
が十分に得られないという課題があった。However, granular,
Regardless of the rod shape, after welding, the cemented carbide particles are wrapped in Fe-based alloy such as mild steel pipe, so that the reaction at the boundary does not proceed sufficiently and does not weld, and the particles themselves during use However, there is a problem that the Fe-based alloy invades into the cemented carbide due to the influence of welding heat and increases the amount of the bonding metal, so that the hardness is reduced and sufficient wear resistance cannot be imparted. . Further, when a semi-sintered rod is used, the semi-sintered body itself is brittle, so that there is a problem that the size of the grains becomes too small and sufficient hardness cannot be obtained.
【０００５】[0005]
【課題を解決するための手段】そのため、本願発明で
は、肉盛用溶接棒に用いる超硬合金に於いて、前記超硬
合金はＷＣ−Ｃｏ系からなり、かつ、結合金属が２〜５
重量％でると共に、相対密度を９８％未満とした粒状か
ら成ることを特徴とするもので、その製法としては造粒
状態のまま焼結し、篩により分級し所定粒度とした、相
対密度が９８％未満の超硬合金の製造方法により達成し
たものでる。Therefore, according to the present invention, in a cemented carbide used for a build-up welding rod, the cemented carbide is composed of a WC-Co system and the bonding metal is 2 to 5 times.
It is characterized by having a relative density of less than 98% by weight and having a relative density of less than 98%. % Of the cemented carbide.
【０００６】[0006]
【作用】肉盛用溶接棒に用いる超硬合金をＷＣ−Ｃｏ系
としたのは、耐摩耗性を付与するには最も良い材料であ
り、更に、結合金属の含有量を２〜５％としたのは、溶
接後のパイプ及び／又は台金から入ってくるＦｅ系合金
が結合金属として作用するため、そのＦｅ系合金の量を
考慮して、２〜５％とした。また、ＴｉＣ、ＴａＣ等の
超硬合金に使用されるＷＣ以外の炭化物等は添加しても
よい。また、結合金属を少なめると、焼結体を製造する
さい緻密な焼結体が得られなくなるが、本願発明では超
硬合金等を製作する際に用いるプレス成形を省くことに
より、意図的にポーラスな状態のまま製作し、そのポー
ラスな部分に溶接時、Ｆｅ系合金を侵入させ、粒−Ｆｅ
系合金の境界をより強固とすることができ、更に、結合
金属の量も増加するが、もとの粒子は結合金属含有量が
少ないため、硬度は十分に保つことができる。The use of a WC-Co cemented carbide as the cemented carbide for the build-up welding rod is the best material for imparting abrasion resistance. Further, the content of the bonding metal is 2 to 5%. The reason is that since the Fe-based alloy entering from the pipe and / or the base metal after welding acts as a bonding metal, the content is set to 2 to 5% in consideration of the amount of the Fe-based alloy. In addition, carbides other than WC used for cemented carbide such as TiC and TaC may be added. Further, when the amount of the bonding metal is reduced, a dense sintered body cannot be obtained when a sintered body is manufactured.However, in the present invention, press molding used when manufacturing a cemented carbide or the like is omitted, thereby intentionally. Manufactured in a porous state, the Fe-based alloy penetrates into the porous part when welding,
Although the boundary of the system alloy can be strengthened and the amount of the binding metal increases, the hardness of the original particles can be sufficiently maintained because the content of the binding metal is small.
【０００７】本願発明ではポーラスな状態のままの超硬
を用いるが、その製造方法は、超硬合金のプロセス同
様、造粒し、造粒粉末をそのまま用いる特徴がある。そ
のことにより、造粒粉末の粒度を調整することによって
粒度調整ができ、粉砕等の行程を簡略することができ
る。焼結後の粒度はその使用目的により様々に調整する
ことができる。耐摩耗性が要求され、かつ、広い面積に
硬装する場合には、例えば５０ｍｅｓｈ以下８０ｍｅｓ
ｈ以上の様に篩分をして粒度を調整する。次に、その相
対密度を９８％未満としたのは、通常の超硬合金焼結体
は真密度（すなわち、相対密度が１００％）であるのに
対し、十分にポーラスであることを示すもので、好まし
くは４０〜８０％の相対密度であれば良い。更に、焼結
体としたのは造粒状態では崩れたり、つぶれたりして粒
子の形状、粒度が保てず、また、粉末冶金的に製造する
際の酸素等のガスを焼結により除去することができるた
めである。以下、実施例に基づき本発明を詳細に説明す
る。In the present invention, a cemented carbide in a porous state is used, but its manufacturing method is characterized in that, like the cemented carbide process, it is granulated and the granulated powder is used as it is. Thereby, the particle size can be adjusted by adjusting the particle size of the granulated powder, and the process such as pulverization can be simplified. The particle size after sintering can be variously adjusted depending on the purpose of use. When abrasion resistance is required and a large area is hard mounted, for example, 50 mesh or less and 80 mesh or less.
h and sieved to adjust the particle size. Next, the reason that the relative density is less than 98% indicates that the ordinary cemented carbide sintered body has a true density (that is, a relative density of 100%), but is sufficiently porous. It is preferable that the relative density is 40 to 80%. Furthermore, the sintered body is broken or crushed in a granulated state, so that the shape and the particle size of the particles cannot be maintained, and a gas such as oxygen during powder metallurgy is removed by sintering. This is because you can do it. Hereinafter, the present invention will be described in detail based on examples.
【０００８】[0008]
【実施例】通常の超硬合金等の製造に用いるＷＣ粉末
（平均粒度２μｍ）、Ｃｏ粉末（平均粒度１μｍ）を用
い、Ｂａｌ ＷＣ−３％ Ｃｏの組成になるように配
合、混合して、造粒した。造粒の際には焼結体の粒度を
考慮して、＋４０ｍｅｓｈ程度の造粒粉とした。その造
粒粉を１５００度で焼結して、粒状の粉末を得た。尚、
比較のため超硬合金ＪＩＳＫ１０相当の一般的に切削工
具等として用いられている焼結体（相対密度１００％）
を粉砕し、所定粒度に篩分したものも製作した。EXAMPLE A WC powder (average particle size 2 μm) and a Co powder (average particle size 1 μm) used in the production of ordinary cemented carbide and the like are blended and mixed to have a composition of Bal WC-3% Co. Granulated. At the time of granulation, granulated powder of about +40 mesh was taken into consideration in consideration of the particle size of the sintered body. The granulated powder was sintered at 1500 degrees to obtain a granular powder. still,
For comparison, a sintered body generally used as a cutting tool or the like equivalent to JIS K10 cemented carbide (100% relative density)
Was crushed and sieved to a predetermined particle size.
【０００９】上記の造粒粉の焼結体を所定篩にて篩分
後、軟鋼のパイプに充填し、溶接棒を作成した。溶接棒
は、パイプ重量に対し、粒子の重量を４倍として、溶接
後の結合金属量を最適となるよう充填量により調整し
た。その溶接棒を用いて、ガス溶接により、鋼板上に肉
盛溶接を行なった。溶接後、鋼板を研磨・ラップし、粒
子の状態及びその硬さを測定した。The sintered body of the granulated powder was sieved with a predetermined sieve, and then filled into a mild steel pipe to prepare a welding rod. The weight of the welding rod was set to be four times the weight of the pipe with respect to the weight of the pipe, and the amount of the bonded metal after welding was adjusted by the filling amount so as to be optimal. Overlay welding was performed on the steel plate by gas welding using the welding rod. After welding, the steel plate was polished and wrapped, and the state of the particles and their hardness were measured.
【００１０】粒子の空隙部には溶接に伴い、Ｆｅ系合金
が結合金属として侵入し、粒子のＣｏと融合し、マトリ
ックス中に十分溶着されていることが分かる。また、そ
の硬さはマイクロビッカース硬さ（荷重２５ｇ）でマト
リックスから１つの粒子を横断するよう一定間隔で測定
したところ、マトリックスではＨＶ３５０、粒子中心付
近ではＨＶ１６００程度と十分な硬さを保っていた。ま
た、比較例も同様に溶接後、硬さはマイクロビッカース
硬さ（荷重２５ｇ）でマトリックスから１つの粒子を横
断するよう一定間隔で測定したところ、マトリックスで
はＨＶ３５０と同じであったが、粒子中心付近ではＨＶ
９００程度とＦｅ系合金が結合金属としてＣｏ中に拡散
したため、硬さの低下が著しかった。[0010] It can be seen that the Fe-based alloy penetrates into the voids of the particles as a binding metal with welding, fuses with the Co of the particles, and is sufficiently welded in the matrix. The hardness was measured at a constant interval so as to cross one particle from the matrix with a micro Vickers hardness (load 25 g). As a result, the matrix maintained a sufficient hardness of about HV350 and about HV1600 near the center of the particle. . Similarly, in the comparative example, after welding, the hardness was measured at regular intervals so as to cross one particle from the matrix with a micro Vickers hardness (load 25 g). HV near
About 900, the Fe-based alloy diffused into Co as a binding metal, so that the hardness was significantly reduced.
【００１１】[0011]
【発明の効果】本願発明の硬装肉盛用溶接棒に用いる超
硬質焼結体を用いることにより、十分な硬さの硬装をす
ることができ、また、それに用いる粒子は、ポーラスで
超硬合金と同様な製造方法で製作することができるとと
もに、十分に溶着させることができ耐摩耗性を付与する
ことができる。By using the super-hard sintered body used for the welding rod for hard overlay of the present invention, it is possible to harden with sufficient hardness, and the particles used therein are porous and ultra-fine. It can be manufactured by the same manufacturing method as that of a hard alloy, can be sufficiently welded, and can have wear resistance.
Claims (2)
て、前記超硬合金はＷＣ−Ｃｏ系からなり、かつ、結合
金属が２〜５重量％でると共に、相対密度を９８％未満
とした粒状から成ることを特徴とする硬装用超硬合金。1. A cemented carbide used for a build-up welding rod, wherein the cemented carbide is composed of a WC-Co alloy, the bonding metal is 2 to 5% by weight, and the relative density is less than 98%. Cemented carbide alloy for hard-wearing, characterized by having a granular shape.
て、前記超硬合金はＷＣ−Ｃｏ系からなり、かつ、結合
金属が２〜５重量％でると共に、造粒状態のまま焼結し
た粒状で、かつ、その相対密度が９８％未満であること
を特徴とする硬装用超硬合金の製造方法。2. A cemented carbide used for a build-up welding rod, wherein the cemented carbide is made of a WC-Co alloy, and has a bonding metal content of 2 to 5% by weight and is sintered in a granulated state. A method for producing a cemented carbide for hard-wearing, wherein the cemented particles are in the form of particles and have a relative density of less than 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9082311A JPH10258390A (en) | 1997-03-14 | 1997-03-14 | Hard mounting cemented carbide and production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9082311A JPH10258390A (en) | 1997-03-14 | 1997-03-14 | Hard mounting cemented carbide and production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10258390A true JPH10258390A (en) | 1998-09-29 |
Family
ID=13771026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9082311A Abandoned JPH10258390A (en) | 1997-03-14 | 1997-03-14 | Hard mounting cemented carbide and production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10258390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214110A (en) * | 2008-03-07 | 2009-09-24 | Teikusu:Kk | Hard clad welding rod and drilling tool manufactured using hard clad welding rod |
-
1997
- 1997-03-14 JP JP9082311A patent/JPH10258390A/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009214110A (en) * | 2008-03-07 | 2009-09-24 | Teikusu:Kk | Hard clad welding rod and drilling tool manufactured using hard clad welding rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5830256A (en) | Cemented carbide | |
| JP2895107B2 (en) | Sintered hard metal composite and method for producing the same | |
| US5482670A (en) | Cemented carbide | |
| US5778301A (en) | Cemented carbide | |
| US7879129B2 (en) | Wear part formed of a diamond-containing composite material, and production method | |
| US20100104874A1 (en) | High pressure sintering with carbon additives | |
| EP0012631B1 (en) | Coated abrasive pellets and method of making same | |
| EP0909869A3 (en) | Hardmetal overlay for earth boring bit | |
| JP2006257467A (en) | Hard metal material for tool and manufacturing method therefor | |
| JPH08209263A (en) | Compacted article and its production | |
| JP2019502823A (en) | Manufacturing method of cemented carbide material | |
| CN103189155A (en) | Method for producing a sintered composite body | |
| JPH0941006A (en) | Layered composite carbide article and production | |
| US3859057A (en) | Hardfacing material and deposits containing tungsten titanium carbide solid solution | |
| US6682580B2 (en) | Matrix powder for the production of bodies or components for wear-resistant applications and a component produced therefrom | |
| US20100043302A1 (en) | Abrasive compacts | |
| JP4297987B2 (en) | High-strength fine-grain diamond sintered body and tool using the same | |
| CN103243252B (en) | Binder-phase wolfram-carbide (WC) hard alloy and preparation method thereof | |
| US6022508A (en) | Method of powder metallurgical manufacturing of a composite material | |
| EP0046209B1 (en) | Steel-hard carbide macrostructured tools, compositions and methods of forming | |
| JPH10258390A (en) | Hard mounting cemented carbide and production | |
| JPH0128094B2 (en) | ||
| US3450511A (en) | Sintered carbide hard alloy | |
| JPH07331376A (en) | Non-magnetic or weak-magnetic diamond sintered compact and its production | |
| US3525607A (en) | Alloy systems and process for the manufacture thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040122 |
|
| A762 | Written abandonment of application |
Free format text: JAPANESE INTERMEDIATE CODE: A762 Effective date: 20050825 |