JPH03154B2 - - Google Patents
Info
- Publication number
- JPH03154B2 JPH03154B2 JP56166100A JP16610081A JPH03154B2 JP H03154 B2 JPH03154 B2 JP H03154B2 JP 56166100 A JP56166100 A JP 56166100A JP 16610081 A JP16610081 A JP 16610081A JP H03154 B2 JPH03154 B2 JP H03154B2
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- cast iron
- ring
- steel material
- iron ring
- 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
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 229910001018 Cast iron Inorganic materials 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/14—Preventing or minimising gas access, or using protective gases or vacuum during welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、円柱状あるいは円筒状の鋼製台金の
外周に超硬合金を一体成形した主に耐摩耗工具に
用いる複合超硬工具の製造方法に関するものであ
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a composite cemented carbide tool, which is mainly used as a wear-resistant tool, in which cemented carbide is integrally molded around the outer periphery of a cylindrical or cylindrical steel base metal. This relates to a manufacturing method.
従来、圧延用ロールまたはガイドローラあるい
はパンチやプラグなどの耐摩耗工具の所要作用面
を超硬合金とし、他の部分を鋼や鋳鉄などで一体
化したものなどが多数提案されている。
Conventionally, many proposals have been made for wear-resistant tools such as rolling rolls, guide rollers, punches, and plugs in which the required working surfaces are made of cemented carbide and the other parts are made of steel, cast iron, or the like.
すなわち、鋼製の本体を機械加工によつて所望
形状に形成した後、この鋼製本体の所定位置に超
硬合金を焼き嵌め、または圧入によつて一体化し
たもの、あるいは鋼製本体の所定位置に超硬合金
をロウ付け固着したもの、また鋼製本体に超硬合
金を機械的な方法によつて固定したものが提案さ
れている。 In other words, after a steel body is formed into a desired shape by machining, a cemented carbide is integrated by shrink-fitting or press-fitting into a predetermined position of the steel body, or There have been proposals in which cemented carbide is fixed in place by brazing, and in which cemented carbide is mechanically fixed to a steel body.
しかしながら、前記した鋼製本体に超硬合金を
焼き嵌め、または圧入によつて一体化したもの
は、使用条件が常温であれば問題になることは少
ないが、これが高温となつたり低温となつたりす
る温度サイクルが加えられるような使用条件や高
温で使用される場合は、鋼材と超硬合金との熱膨
張率の相違から超硬合金を割損させたり、固着力
が極端に低下したりして該工具を破損させたりす
る。
However, if the cemented carbide is integrated into the steel body by shrink-fitting or press-fitting, there are few problems if the usage conditions are room temperature, but if the temperature becomes high or low, If the steel material is subjected to temperature cycles or is used at high temperatures, the difference in thermal expansion coefficient between steel and cemented carbide may cause cracking of the cemented carbide or extremely decrease in adhesion. or damage the tool.
また、鋼製本体に超硬合金をロウ付け固着した
ものにおいては、ロウ付け時の残留応力の除去が
きわめて難しく超硬合金にクラツクを多発させる
ので耐摩耗工具、特に使用にあたつて温度サイク
ルや大きな作用負荷を受ける圧延ロールやガイド
ローラなどには適さない。 In addition, in the case of a steel body in which cemented carbide is brazed and fixed, it is extremely difficult to remove the residual stress during brazing, which often causes cracks in the cemented carbide. It is not suitable for rolling rolls, guide rollers, etc. that are subject to large loads.
そして、鋼製本体に超硬合金を機械的に固定さ
せたものは、構造が複雑となり機械加工が難しく
工具コストを高めるのと同時に該本体に対する超
硬合金の保持力に問題を有し工具の破損を多発さ
せる恐れがある。 A structure in which cemented carbide is mechanically fixed to a steel body has a complicated structure, making machining difficult and increasing tool cost. There is a risk of frequent damage.
本発明は、以上のような従来の技術が有する課
題を解決するためになしたもので、鋼材に比べて
高価で、かつ重量も大（比重は鋼材に比べて約２
倍）で、しかも硬度の高い難加工性の超硬合金を
該工具の作用面のみとし、他を超硬合金に比べて
安価で、軽く剛性に富み機械加工性がきわめて良
好な鋼材とし、これらを強固に一体化させた割損
や破損がきわめて少なく、かつ工具重量が軽く取
り扱いも容易で、機械加工コストと材料費の低減
を可能とする主に耐摩耗工具に使用される複合超
硬工具の製造方法を提供することを目的とするも
のてである。
The present invention was made to solve the above-mentioned problems of the conventional technology, which is expensive and heavy compared to steel materials (specific gravity is about 2% compared to steel materials).
The working surface of the tool is made of cemented carbide, which is hard and difficult to machine, and the other parts are made of steel, which is cheaper than cemented carbide, lighter, more rigid, and has extremely good machinability. This is a composite carbide tool that is mainly used for wear-resistant tools, which has extremely low breakage and breakage due to its strong integration, and is lightweight and easy to handle, making it possible to reduce machining costs and material costs. The purpose of this invention is to provide a method for manufacturing.
本発明は、前々記した従来の技術が有する課題
を下記する手段によつて解決したものである。
The present invention solves the problems of the conventional techniques mentioned above by using the following means.
つまり、所定の有効肉厚を有するリング状超硬
合金の内周に鋳鉄製リングを圧入し、該鋳鉄製リ
ングの内周には円柱または円筒状の鋼材を冷し嵌
めし、これを鋳鉄の融点を越えることのない温度
を加えて前記三つの金属を一体化させるようにし
たものである。 In other words, a cast iron ring is press-fitted into the inner periphery of a ring-shaped cemented carbide having a predetermined effective wall thickness, and a cylindrical or cylindrical steel material is cold-fitted into the inner periphery of the cast iron ring. The three metals are integrated by applying a temperature that does not exceed their melting point.
本発明は、上記したようにリング状超硬合金に
鋳鉄製リングを圧入し、該鋳鉄製リングの内周へ
円柱状または円筒状の鋼材を冷し嵌めしたから、
これら各部材間の残留応力を減少させて割損や破
損を低減させるのと同時に、加熱することによつ
て拡散する鋳鉄製リングの体積減少分を圧入と冷
し嵌めのそれぞれの応力によつてカバーして効果
的な接合状態を長期にわたつて維持できる。
In the present invention, as described above, a cast iron ring is press-fitted into a ring-shaped cemented carbide, and a cylindrical or cylindrical steel material is cold-fitted to the inner circumference of the cast iron ring.
At the same time, the residual stress between these parts is reduced to reduce breakage and breakage, and at the same time, the volume reduction of the cast iron ring that diffuses due to heating is compensated for by the stresses of press-fitting and cold-fitting. It can be covered and maintain an effective bonded state for a long period of time.
また、外周側のリング状超硬合金と内周側の円
柱状または円筒状の鋼材との間に鋳鉄製リングを
介在させた主たる理由は、拡散を高めるためには
カーボン含有量の多い金属が効果的であるが、こ
れが、カーボン量の多い超硬合金とカーボン含有
量のきわめて少ない鋼材とを加熱すると、超硬合
金側のカーボンが鋼材側へ移項して超硬合金の所
期の特性値が損なわれる。 In addition, the main reason for interposing a cast iron ring between the ring-shaped cemented carbide on the outer circumference and the cylindrical or cylindrical steel material on the inner circumference is that metals with a high carbon content are required to increase diffusion. This is effective, but when a cemented carbide with a large amount of carbon and a steel material with a very low carbon content are heated, the carbon in the cemented carbide transfers to the steel and the desired characteristic values of the cemented carbide are lost. is damaged.
そこで、カーボン量が超硬合金の下限値に近
く、かつ鋼材の上限値に近い鋳鉄を超硬合金と鋼
材との間に介在させて加熱すると、鋳鉄側のカー
ボンがリング状超硬合金と円柱状または円筒状の
鋼材とに旨く相互拡散されて、これら三つの金属
を強固に一体化することができる。 Therefore, when cast iron, whose carbon content is close to the lower limit of the cemented carbide and the upper limit of the steel material, is placed between the cemented carbide and the steel material and heated, the carbon on the cast iron side forms a circle with the ring-shaped cemented carbide. It is successfully interdiffused with the columnar or cylindrical steel material, and these three metals can be strongly integrated.
なお、該鋳鉄製リングは、その機械的性質から
肉厚t1はできる限り薄い方が好ましいが、これが
0.3mmを下回ると圧入に際して、該鋳鉄製リング
が割損する恐れがあり、また、この肉厚t1が５mm
を越えると加熱によつて前記鋳鉄製リングの熱膨
張が大きなものとなり鋳鉄製リングならびにリン
グ状超硬合金にクラツクが生じる危険性が大とな
つて好ましくない。 Note that it is preferable that the wall thickness t 1 of the cast iron ring is as thin as possible due to its mechanical properties;
If it is less than 0.3 mm, the cast iron ring may break during press-fitting, and if the wall thickness t1 is 5 mm
Exceeding this is not preferable because the thermal expansion of the cast iron ring becomes large due to heating, increasing the risk of cracks occurring in the cast iron ring and the ring-shaped cemented carbide.
以下、本発明の実施例を添付した図にもとずい
て説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
所定の有効肉厚ｔと外径Ｄとを有する周期律表
の4a、5a、6a族金属の炭化物・窒化物・炭窒化
物の内１種もしくは２種以上と、鉄とコバルトと
ニツケルの内１種または２種以上とからなるリン
グ状超硬合金１の内周１１へ、前記内周を基準と
して外周側２１に約0.05％の圧入代を加味して径
大に形成した所定肉厚t1を有する鋳鉄製リング２
を圧入する。 One or more carbides, nitrides, and carbonitrides of metals in Groups 4a, 5a, and 6a of the periodic table having a predetermined effective wall thickness t and outer diameter D, and iron, cobalt, and nickel. A predetermined wall thickness t is formed on the inner periphery 11 of a ring-shaped cemented carbide 1 made of one or more types of cemented carbide to have a larger diameter with a press-fitting allowance of about 0.05% on the outer periphery 21 based on the inner periphery. cast iron ring with 1 2
Press in.
次に、円柱状または円筒状の鋼材３は、前記し
た鋳鉄製リングの内周２２を基準に径大に形成し
た外周３１を有してなり、この鋼材３を図外のケ
ロシンまたは軽油中にドライアイスを投入してな
る−160℃前後の低温槽中に浸漬し、前記鋼材を
所定量熱収縮させた後、前記したリング状超硬合
金の内周に圧入固着してある鋳鉄製リングの内周
２２へ嵌合させてから常温まで昇温させることに
よつてリング状超硬合金１と鋳鉄製リング２と鋼
材３とを一体化する。 Next, a cylindrical or cylindrical steel material 3 has an outer periphery 31 formed with a large diameter based on the inner periphery 22 of the cast iron ring described above, and this steel material 3 is placed in kerosene or light oil (not shown). After the steel material is immersed in a low-temperature tank containing dry ice at around -160°C and heat-shrinked by a predetermined amount, a cast iron ring is press-fitted and fixed to the inner periphery of the ring-shaped cemented carbide. The ring-shaped cemented carbide 1, the cast iron ring 2, and the steel material 3 are integrated by fitting them onto the inner periphery 22 and raising the temperature to room temperature.
以上のように一体化した複合超硬工具Ａは、酸
化の促進を防ぐために遷充性や中性の雰囲気炉内
または真空炉内に設置して1140℃（鋳鉄の融点を
10℃下回る温度）で約30分間加熱させる。 The composite cemented carbide tool A integrated as described above is installed in a transitional or neutral atmosphere furnace or a vacuum furnace to prevent the acceleration of oxidation.
Heat for about 30 minutes at a temperature below 10℃.
以上によつて、鋳鉄製リング２が外周側のリン
グ状超硬合金１と内周側の鋼材３とに相互的に拡
散されて上記した三つの金属を強固に一体化す
る。 As described above, the cast iron ring 2 is mutually diffused into the ring-shaped cemented carbide 1 on the outer circumferential side and the steel material 3 on the inner circumferential side, thereby firmly integrating the three metals described above.
なお、前記した複合超硬工具Ａを加熱するのに
好ましい方法は、10Tprr前後の真空中でおこなえ
ば、加熱中に金属から発生するガスを効果的に排
出して接合部間にピンホールなどの発生を防止し
て、より強固に一体化できる。 The preferred method for heating the above composite carbide tool A is to heat it in a vacuum of around 10 Tprr , which will effectively exhaust the gas generated from the metal during heating and eliminate pinholes between the joints. It is possible to prevent this from occurring and create a stronger integration.
以上によつて、接合部間に残留応力の滞留のき
わめて少ない状態で強固に一体化された複合超硬
工具Ａは、例えば、第２図に示したような複合超
硬合金製ロールＢとして、孔型または平型などの
圧延作用面１１を有するものに機械加工される。 As described above, the composite cemented carbide tool A, which is firmly integrated with extremely little residual stress retention between the joints, can be used as a composite cemented carbide roll B as shown in FIG. 2, for example. It is machined into a shape having a rolling surface 11 such as a hole shape or a flat shape.
以上のロールＢは、二点鎖線で示したようなロ
ール本体１００に嵌合され、該本体のネジ１１０
にナツト２００の螺合とピン３００の回り止めに
よつてロール本体に固定して使用される。 The roll B described above is fitted into the roll main body 100 as shown by the two-dot chain line, and the screw 110 of the main body
It is used by being fixed to the roll body by screwing the nut 200 and preventing rotation of the pin 300.
本発明は、以上に述べた構成によつて、鋼材３
の両側面ならびに内周面３２は容易に任意の形状
に機械加工が可能であると同時に、材料費の安い
鋼材の使用によつて加工コストと工具コストを大
きく低減させる。
The present invention has the structure described above.
Both side surfaces and the inner circumferential surface 32 can be easily machined into any shape, and at the same time, machining costs and tool costs can be greatly reduced by using low-cost steel.
しかも、全体を超硬合金で形成したもので比べ
て重量が大巾に軽くなるので、その取り扱いも頗
る簡便におこなえるのと共に、ロウ付け接合のよ
うに残留応力に起因するクラツクの発生や機械接
合のときに見られる保持力の低下による不具合も
除去できて長期にわたつて安定的に使用できるも
のである。 Moreover, since it is much lighter in weight than one made entirely of cemented carbide, it is much easier to handle, and it also prevents cracks caused by residual stress like brazing joints, and mechanical joints. It is possible to eliminate the problems caused by the decrease in holding power that occur when using the product, and it can be used stably over a long period of time.
第１図は複合超硬工具の縦断面図、第２図は複
合超硬工具の応用例を示す縦断面図である。
Ａ…複合超硬工具、Ｂ…複合超硬合金製ロー
ル、１…リング状超硬合金、２…鋳鉄製リング、
３…鋼材、１００…ロール本体、２００…ナツ
ト、３００…ピン。
FIG. 1 is a longitudinal sectional view of a composite carbide tool, and FIG. 2 is a longitudinal sectional view showing an application example of the composite carbide tool. A... Composite cemented carbide tool, B... Composite cemented carbide roll, 1... Ring-shaped cemented carbide, 2... Cast iron ring,
3... Steel material, 100... Roll body, 200... Nut, 300... Pin.
Claims (1)
内周に鋳鉄製リングを圧入し、該鋳鉄製リングの
内周には円柱または円筒状の鋼材を冷し嵌めし、
これを鋳鉄の融点を越えることのない温度を加え
て前記三つの金属を一体化させたとを特徴とする
複合超硬工具の製造方法。1. A cast iron ring is press-fitted into the inner periphery of a ring-shaped cemented carbide having a predetermined effective wall thickness, and a cylindrical or cylindrical steel material is cold-fitted onto the inner periphery of the cast iron ring,
A method for manufacturing a composite cemented carbide tool, characterized in that the three metals are integrated by applying a temperature that does not exceed the melting point of cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16610081A JPS5868488A (en) | 1981-10-16 | 1981-10-16 | Composite sintered hard alloy tool and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16610081A JPS5868488A (en) | 1981-10-16 | 1981-10-16 | Composite sintered hard alloy tool and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5868488A JPS5868488A (en) | 1983-04-23 |
| JPH03154B2 true JPH03154B2 (en) | 1991-01-07 |
Family
ID=15825005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16610081A Granted JPS5868488A (en) | 1981-10-16 | 1981-10-16 | Composite sintered hard alloy tool and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5868488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143161A1 (en) | 2007-05-21 | 2008-11-27 | Mitsubishi Materials Corporation | Rolling roll and roller |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6245475B2 (en) * | 2014-07-30 | 2017-12-13 | 公益財団法人鉄道総合技術研究所 | Manufacturing method of dissimilar metal composite member |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220355A (en) * | 1975-08-08 | 1977-02-16 | Toyo Kogyo Co | Bits for opening tap hole of blast furnace |
-
1981
- 1981-10-16 JP JP16610081A patent/JPS5868488A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220355A (en) * | 1975-08-08 | 1977-02-16 | Toyo Kogyo Co | Bits for opening tap hole of blast furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143161A1 (en) | 2007-05-21 | 2008-11-27 | Mitsubishi Materials Corporation | Rolling roll and roller |
| US8770004B2 (en) | 2007-05-21 | 2014-07-08 | Mitsubishi Materials Corporation | Rolling mill roll and rolling mill machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5868488A (en) | 1983-04-23 |
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