JPH0346542B2 - - Google Patents
Info
- Publication number
- JPH0346542B2 JPH0346542B2 JP58075174A JP7517483A JPH0346542B2 JP H0346542 B2 JPH0346542 B2 JP H0346542B2 JP 58075174 A JP58075174 A JP 58075174A JP 7517483 A JP7517483 A JP 7517483A JP H0346542 B2 JPH0346542 B2 JP H0346542B2
- Authority
- JP
- Japan
- Prior art keywords
- carbide
- cutting edge
- cutter
- coated
- blade
- 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
- 238000005520 cutting process Methods 0.000 claims description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 150000003839 salts Chemical class 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 10
- 238000007654 immersion Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- -1 boron Chemical class 0.000 claims description 3
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 17
- 239000011247 coating layer Substances 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 12
- 230000000873 masking effect Effects 0.000 description 10
- 238000005498 polishing Methods 0.000 description 6
- 229910021538 borax Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000004328 sodium tetraborate Substances 0.000 description 5
- 235000010339 sodium tetraborate Nutrition 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910000592 Ferroniobium Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 description 2
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
本発明はナイフ等の刃物の刃先部のみに炭化物
層を被覆する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for coating only the cutting edge of a cutter such as a knife with a carbide layer.
溶融塩浴法を用いて、刃物の表面にバナジウム
炭化物等の炭化物被覆層を形成し、この炭化物被
覆層の有するすぐれた硬度により切れ味、耐久性
を向上させようとする方法がある。しかし、刃物
の全面に上記のような炭化物被覆層を形成する場
合、炭化物形成のために、炭化物被覆層が形成さ
れる付近の母材部分から炭素を刃物表面に移動さ
せるため、表面部分に母材深部からの炭素の供給
が追いつかない等の不都合が生じ、その結果炭化
物形成後に行なう焼入れに必要な炭素量が母材と
炭化物被覆層の間で不足してしまう。特に刃先近
傍の肉厚の薄い部分には、母材深部からの炭素の
供給が充分でないため、炭化物被覆層を形成した
後の刃先近傍には、炭素量が極度に乏しい「フエ
ライト相」と呼ばれるビツカース硬度が約200で
ある軟質部分を生じてしまう。そのため、この刃
先は軟質部分の存在により、大きな応力がかかる
とへたりや剥離等の欠陥を生ずる。 There is a method in which a carbide coating layer such as vanadium carbide is formed on the surface of a cutter using a molten salt bath method, and the excellent hardness of this carbide coating layer is used to improve sharpness and durability. However, when forming a carbide coating layer as described above on the entire surface of a cutlery, carbon is transferred from the base material near where the carbide coating layer is formed to the surface of the cutter to form carbide. Problems such as the inability to keep up with the supply of carbon from the deep part of the material occur, and as a result, the amount of carbon necessary for quenching performed after carbide formation is insufficient between the base material and the carbide coating layer. Particularly in the thin part near the cutting edge, there is not enough carbon supplied from deep within the base material, so after the carbide coating layer is formed, the area near the cutting edge is called a "ferrite phase" which is extremely poor in carbon content. This results in a soft part with a Vickers hardness of approximately 200. Therefore, due to the presence of a soft portion in this cutting edge, defects such as sagging or peeling occur when large stress is applied to the cutting edge.
このため、従来では、上記欠陥のない刃物の製
造のために、炭化物層を形成したのち、研摩し
て、刃先近傍のフエライト相を除去して切り刃部
を形成する工程、あるいは非酸化性雰囲気中でオ
ーステナイト変態点以上に一定時間加熱したの
ち、急冷して焼入れを行い、母材深部の炭素を刃
先近傍の炭素希薄部へ拡散移動させる工程が必要
であつた。しかしながら、上記炭化物層の研摩の
場合、炭化物層の硬度がビツカース硬度で約3000
と非常に硬いため、研摩に時間がかかり、かつ研
摩中に刃先が欠ける等の不都合を多発した。ま
た、上記の炭素を移動させる熱拡散を行う場合、
再加熱する工程が加わるほかに加熱時間に長時間
を要する等の不都合が生じた。更に、刃先部の肉
厚が薄く、刃先母材中の炭素量も限られるため、
形成される炭化物層の厚さも薄くなる問題もあつ
た。 For this reason, conventionally, in order to manufacture blades without the above defects, the process of forming a carbide layer and then polishing to remove the ferrite phase near the cutting edge to form a cutting edge, or the process of forming a cutting edge in a non-oxidizing atmosphere, It was necessary to heat the base metal for a certain period of time above the austenite transformation point, then rapidly cool and harden it, thereby diffusing and moving the carbon deep in the base material to the carbon-poor area near the cutting edge. However, in the case of polishing the carbide layer, the hardness of the carbide layer is about 3000 on the Bitkers hardness.
Because it was very hard, it took a long time to polish it, and it often caused problems such as the cutting edge chipping during polishing. In addition, when performing thermal diffusion to move the above carbon,
In addition to the additional step of reheating, there were other inconveniences such as a long heating time. Furthermore, the wall thickness of the cutting edge is thin and the amount of carbon in the cutting edge base material is limited.
Another problem was that the thickness of the carbide layer formed was also thin.
本発明は、炭化物層形成範囲を刃物の刃先部の
みに限り、炭化物層厚さの厚い炭化物被覆を可能
にすると同時に、母材の硬さ低下がなく、上記従
来の問題点のない、切れ味、耐久性ともにすぐれ
た刃物を製造する方法を提供しようとするもので
ある。 The present invention limits the carbide layer formation range to only the cutting edge of the cutter, making it possible to form a thick carbide coating, and at the same time, the hardness of the base material does not decrease, and the sharpness is improved without the above-mentioned conventional problems. The purpose is to provide a method for manufacturing cutlery with excellent durability.
すなわち、本発明の刃物の製造方法は、0.2重
量％以上の炭素を含む鉄合金を素材とする刃物の
刃先より0.01−１mmの刃先近傍部分を除き、その
他の部分を溶融塩浴浸漬に対して安定な酸化シリ
コン、酸化アルミニウム等の金属酸化物、シリコ
ン、ボロン等の窒化物或いは炭化物、または黒鉛
粉末の１種または２種以上からなる物質で被覆し
た後、該刃物を周期律表第ａ、ａ族元素、マ
ンガン等の炭化物形成元素を含む溶融塩浴に浸漬
することにより上記被覆部分を除く刃先近傍への
炭素の供給を十分に行い、刃先の表面のみに炭化
物層を形成し、その後焼入れすることを特徴とす
るものである。 In other words, the method for manufacturing cutlery of the present invention is to remove a portion 0.01-1 mm from the edge of a cutter made of an iron alloy containing 0.2% by weight or more of carbon, and immerse the other portion in a molten salt bath. After being coated with a substance consisting of one or more of stable metal oxides such as silicon oxide and aluminum oxide, nitrides or carbides such as silicon and boron, or graphite powder, the cutter is coated with a substance consisting of one or more of stable metal oxides such as silicon oxide and aluminum oxide, and graphite powder. By immersing the blade in a molten salt bath containing carbide-forming elements such as Group A elements and manganese, carbon is sufficiently supplied to the vicinity of the cutting edge excluding the coated portion, forming a carbide layer only on the surface of the cutting edge, and then quenching. It is characterized by:
本発明方法によれば、刃物の刃先近傍部分以外
は、溶融塩浴浸漬に対して安定な物質で被覆し
て、刃先表面のみに炭化物層を形成するため、炭
化物被覆されない母材深部から刃先近傍への炭素
の供給が十分行なわれ、フエライト相のごとき軟
質部分が生じない。そのため、刃先部の母材硬さ
の低下のない刃物を製造することができる。ま
た、刃先部に母材深部から十分炭素を供給するこ
とができるので、層厚さの厚い炭化物層を形成す
ることができ、刃先を非常に硬くすることができ
る。それ故、従来のごとき、炭化物被覆処理後、
研摩により切り刃部を形成する工程や非酸化性雰
囲気中で加熱することにより母材中の炭素を拡散
移動させる工程が不要となり、きわめて簡単な処
理工程で炭化物被覆した刃物を製造することがで
き、しかも、製造された刃物の切れ味、耐久性と
も著しく向上する。 According to the method of the present invention, the parts other than the vicinity of the cutting edge of the cutter are coated with a substance that is stable against immersion in a molten salt bath, and a carbide layer is formed only on the surface of the cutting edge. Carbon is sufficiently supplied to the steel, and soft parts such as ferrite phases do not occur. Therefore, it is possible to manufacture a cutter without reducing the hardness of the base material at the cutting edge. Furthermore, since carbon can be sufficiently supplied to the cutting edge portion from deep within the base material, a thick carbide layer can be formed, and the cutting edge can be made extremely hard. Therefore, after conventional carbide coating treatment,
This eliminates the need for the process of forming the cutting edge by polishing and the process of diffusing and moving carbon in the base material by heating in a non-oxidizing atmosphere, making it possible to manufacture carbide-coated blades with extremely simple processing steps. Moreover, the sharpness and durability of the manufactured cutlery are significantly improved.
本発明方法において、出発材料である刃物素材
はまず炭素を0.2％（重量比、以下同じ）以上含
有する必要がある。炭素含有量は高い程、良質な
炭化物層を形成することができるが、逆に炭素含
有量が0.2％にみたない場合には炭化物被覆層の
形成が困難になる。 In the method of the present invention, the starting material for the cutlery must first contain 0.2% or more (by weight, the same applies hereinafter) of carbon. The higher the carbon content, the better quality a carbide layer can be formed, but conversely, if the carbon content is less than 0.2%, it becomes difficult to form a carbide coating layer.
刃物素材の形状としてはナイフ等の薄刃のもの
が好ましく、例えば刃部刃先角が30°以下のよう
な薄刃のものが好ましい。この範囲を越える刃物
の場合には、炭化物被覆層を形成した後、刃物の
切れ味を良くするため研摩等により刃部を形成す
ることが好ましい。特に、刃物の形が小さく、研
摩による刃部形成の手作業が困難なものの方が本
発明の方法に適している。 The shape of the cutter material is preferably a thin blade such as a knife, for example, a thin blade with a cutting edge angle of 30° or less. In the case of cutlery exceeding this range, after forming the carbide coating layer, it is preferable to form the blade portion by polishing or the like in order to improve the sharpness of the cutlery. In particular, the method of the present invention is suitable for blades that are small in shape and for which it is difficult to manually form the blade by polishing.
前記溶融塩浴浸漬法に対して安定な物質（以
下、マスキング剤という）とは刃物を溶融塩浴に
浸漬した際に、溶融塩と反応することなく、また
被覆した鉄合金母材表面に炭化物層を形成させな
い物質を意味する。かかる物質としては酸化シリ
コン、酸化アルミニウム等の金属酸化物、シリコ
ン、ボロン等の窒化物あるいは炭化物、または黒
鉛粉末等の１種または２種以上を用いる。 A substance that is stable to the molten salt bath immersion method (hereinafter referred to as a masking agent) is a substance that does not react with the molten salt when the cutlery is immersed in the molten salt bath, and that does not cause carbide on the surface of the coated iron alloy base material. A substance that does not form a layer. As such substances, one or more of metal oxides such as silicon oxide and aluminum oxide, silicon, nitrides or carbides such as boron, and graphite powder are used.
そして、上記マスキング剤を刃物に被覆する方
法としては、刃先部分以外の刃物表面に塗布剤の
形で塗布する方法、あるいは炭化物層被覆する刃
先部に粘土等によりシールドしておき、次いで刃
物を上記マスキング剤の水溶液に浸漬して被覆す
る方法等を用いる。このようにして、刃先の炭化
物層を形成する部分以外を安定な物質で被覆する
のであるが、この被覆しない部分は、刃物の刃先
より0.01〜１mmとする。１mm以上を残して、他の
部分をマスキング剤で被覆した場合には溶融塩浴
に浸漬する工程で刃先の広範囲において炭化物層
が形成されて、フエライト相の軟質部分を生じる
おそれがある。 The masking agent can be coated on the cutlery by applying it in the form of a coating agent to the surface of the cutter other than the cutting edge, or by shielding the cutter tip to be coated with a carbide layer with clay, etc. A method such as coating by dipping in an aqueous solution of a masking agent is used. In this way, the part of the cutting edge other than the part forming the carbide layer is coated with a stable substance, and this uncoated part is set at a distance of 0.01 to 1 mm from the cutting edge of the cutting tool. If 1 mm or more is left and the other parts are coated with a masking agent, there is a risk that a carbide layer will be formed over a wide area of the cutting edge during the immersion process in a molten salt bath, resulting in a soft part of the ferrite phase.
刃先部の表面に炭化物被覆層を形成する方法と
しては、周期律表第ａ族元素（チタン、ジルコ
ニウム、ハフニウム）、第ａ族元素（バナジウ
ム、ニオブ、タンタル）、マンガン等の炭化物形
成元素を含む溶融浴に上記のごとくマスキング剤
の被覆処理をした刃物を浸漬保持する。この溶融
塩浴としては、硼酸あるいは硼砂等を加熱して溶
融した溶融液体に、周期律表第ａ、ａ族元
素、マンガン等の金属粉末、あるいは塩化物粉末
等を添加した浴を使用することが好ましい。な
お、硼酸、あるいは硼酸塩以外の他の塩浴を使用
することも可能であるが、浴の安定性、層の均一
性などの点より余り好ましくない。 Methods for forming a carbide coating layer on the surface of the cutting edge include carbide-forming elements such as Group A elements of the periodic table (titanium, zirconium, hafnium), Group A elements (vanadium, niobium, tantalum), manganese, etc. The cutlery coated with the masking agent as described above is immersed and held in the molten bath. As this molten salt bath, use a bath in which boric acid, borax, etc. is heated and melted, and a metal powder such as an element of group a or group a of the periodic table, manganese, or chloride powder is added to the molten liquid. is preferred. Although it is possible to use boric acid or other salt baths other than borate, this is not preferred in terms of bath stability, layer uniformity, etc.
溶融塩浴浸漬の処理温度（浴温度）も可能なか
ぎり低いのが望ましい。処理温度が高くなり過ぎ
ると結晶の成長が起こり、もろくなりやすい。し
かし、800℃以下になると炭化物形成速度が著し
く遅くなるためあまり低い処理温度は好ましくな
い。したがつて、浴温は800℃ないし1100℃が好
ましい。 It is also desirable that the treatment temperature (bath temperature) for immersion in a molten salt bath be as low as possible. If the processing temperature is too high, crystal growth will occur and the material will become brittle. However, if the temperature is below 800°C, the rate of carbide formation will be extremely slow, so a treatment temperature that is too low is not preferred. Therefore, the bath temperature is preferably 800°C to 1100°C.
処理時間は必要とする炭化物被覆層の厚さによ
る。処理時間が長くなれば、それだけ厚い炭化物
被覆層が得られる。炭化物層の厚さは、処理時間
を選定することによつて、自由に調節することが
できるが、層を厚くしすぎると、刃先が丸くなる
ため、切れ味をそこなうことがある。 Processing time depends on the required thickness of the carbide coating layer. The longer the treatment time, the thicker the carbide coating layer. The thickness of the carbide layer can be freely adjusted by selecting the processing time, but if the layer is too thick, the cutting edge will become rounded, which may impair sharpness.
次に刃先の表面のみに炭化物被覆層を形成され
た刃物を溶融塩浴から取り出し、直ちに水、油、
非酸化性ガス、あるいはその他適当な冷媒に浸漬
あるいは接触させて急冷し焼入れ処理を行う。焼
入れ条件は刃物の母材の組成に依存し、従来の焼
入れ条件でそのまま使用することができる。この
焼入れは、通常マスキング剤が付着しているまま
行なえば良い。また、マスキング剤は、焼入れ後
除去する。 Next, the blade with the carbide coating layer formed only on the surface of the blade edge is removed from the molten salt bath, and immediately soaked in water, oil, etc.
The material is quenched by immersion in or in contact with a non-oxidizing gas or other suitable refrigerant, and then quenched. The hardening conditions depend on the composition of the base material of the cutter, and the blade can be used as is under conventional hardening conditions. This hardening can normally be carried out with the masking agent still attached. Moreover, the masking agent is removed after quenching.
以上の工程により、目的とする刃先のみに炭化
物被覆した刃物を得ることができ、得られた刃物
は刃部を再研摩する必要がなく、そのまま使用す
ることができる。 Through the above steps, it is possible to obtain a knife coated with carbide only on the intended cutting edge, and the obtained knife can be used as is without the need to re-sharpen the blade portion.
以下、本発明の実施例を説明する。 Examples of the present invention will be described below.
実施例 １
硼砂100部に対し、20部のフエロニオビウム
（Fe−Nb）粉末を添加した約1000℃の溶融硼砂
浴を大気雰囲気の電気炉内で準備した。また、図
に示すように、刃先より0.8mmの刃先近傍部分３
を除き、それ以外の刃物母材２の表面に前記マス
キング剤としての黒鉛粉末１を塗布した刃物（刃
先角20°、巾13mm、長さ57mm、厚さ0.15mm、炭素
鋼製ナイフ）を準備した。Example 1 A molten borax bath at about 1000° C. was prepared in an electric furnace in an atmospheric atmosphere by adding 20 parts of ferroniobium (Fe-Nb) powder to 100 parts of borax. In addition, as shown in the figure, the part 3 near the cutting edge 0.8 mm from the cutting edge
Prepare a knife (20° cutting edge angle, width 13 mm, length 57 mm, thickness 0.15 mm, carbon steel knife) with graphite powder 1 applied as a masking agent on the surface of the knife base material 2 other than that. did.
次に、この刃物を上記浴中に８時間保持後、浴
から取り出し油冷した。これを熱水で洗滌し、付
着している処理剤やマスキング剤としての黒鉛粉
末を除去した。得られた刃物は刃先部の表面にの
み、厚さ10μの緻密なニオビウム炭化物（NbC）
被覆層をもつものであつた。この刃物は切れ味、
耐久性ともにすぐれたものであつた。 Next, this cutlery was kept in the bath for 8 hours, then taken out from the bath and cooled in oil. This was washed with hot water to remove the adhering processing agent and graphite powder as a masking agent. The resulting knife has a dense niobium carbide (NbC) with a thickness of 10μ only on the surface of the cutting edge.
It had a coating layer. This knife is sharp,
It had excellent durability.
実施例 ２
硼砂100部に対し、30部のバナジウム酸化物
（V2O5）粉末と、10部の炭化硼素（B4C）粉末を
添加した約1025℃の溶融硼砂浴を大気雰囲気の電
気炉内で準備した。この浴に刃先より0.5mm近傍
部分以外の母材表面に酸化アルミニウム
（Al2O3）粉末で塗布した刃物（刃先角20°、巾９
mm、長さ85mm、厚さ0.4mm、炭素鋼製ナイフ）を
浸漬し、浴中に２時間保持後、浴から取り出し、
油冷した。その後、実施例１と同様に刃物素材表
面に付着した処理剤を取り除いて、刃物を製造し
た。Example 2 A molten borax bath at about 1025°C, in which 30 parts of vanadium oxide (V 2 O 5 ) powder and 10 parts of boron carbide (B 4 C) powder were added to 100 parts of borax, was heated to an electric current in an atmospheric atmosphere. Prepared in the oven. A cutlery ( 20 ° edge angle, 9 width
mm, length 85 mm, thickness 0.4 mm, carbon steel knife) was immersed in the bath for 2 hours, then removed from the bath.
Oil cooled. Thereafter, in the same manner as in Example 1, the treatment agent adhering to the surface of the blade material was removed to produce a blade.
この刃物は刃先より約0.5mmまでの近傍部分の
表面のみに、厚さ7μの緻密なバナジウム炭化物
（VC）被覆層をもつものであつた。 This knife had a dense vanadium carbide (VC) coating layer with a thickness of 7μ only on the surface up to about 0.5mm from the cutting edge.
次にこの製造した刃物を用いて、厚さ0.1mm、
巾３mmの塩ビフイルムの切断試験を1.5時間行つ
た。 Next, using this manufactured blade,
A cutting test was conducted on a PVC film with a width of 3 mm for 1.5 hours.
その結果、本実施例により製造された刃物の耐
久性は従来の未処理刃に比べて、約10倍も向上し
ており、本発明により製造された刃物の切断性能
が著しくすぐれていることがわかつた。 As a result, the durability of the blade manufactured according to this example was approximately 10 times higher than that of a conventional untreated blade, indicating that the cutting performance of the blade manufactured according to the present invention was significantly superior. I understand.
図は、本発明の実施例１における、溶融塩浴浸
漬に対して安定な物質を塗布した刃物の断面図で
ある。
１……刃物、１１……刃先、２……マスキング
剤。
The figure is a cross-sectional view of a cutter coated with a substance stable against immersion in a molten salt bath in Example 1 of the present invention. 1...Knife, 11...Blade tip, 2...Masking agent.
Claims (1)
する刃物において、その刃先より0.01〜１mmの刃
先近傍部分を除き、他の部分を溶融塩浴浸漬に対
して安定な酸化シリコン、酸化アルミニウム等の
金属酸化物、シリコン、ボロン等の窒化物或いは
炭化物、または黒鉛粉末の１種または２種以上か
らなる物質で被覆し、その後該刃物を周期律表第
ａ、ａ族元素、マンガン等の炭化物形成元素
を含む溶融塩浴に浸漬し、刃先の表面のみに炭化
物層を形成し、その後焼入れすることを特徴とす
る炭化物被覆された刃物の製造法。1. For cutlery made of iron alloy containing 0.2% by weight or more of carbon, except for the area 0.01 to 1 mm near the cutting edge, the rest of the blade should be covered with silicon oxide, aluminum oxide, etc. that are stable against immersion in a molten salt bath. The blade is coated with a substance consisting of one or more of metal oxides, silicon, nitrides or carbides such as boron, or graphite powder, and then the cutter is coated with a material consisting of one or more of metal oxides of silicon, boron, etc. A method for manufacturing a carbide-coated cutlery, which comprises immersing the cutter in a molten salt bath containing forming elements to form a carbide layer only on the surface of the cutter edge, and then hardening the cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7517483A JPS59200766A (en) | 1983-04-28 | 1983-04-28 | Production of carbide-coated blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7517483A JPS59200766A (en) | 1983-04-28 | 1983-04-28 | Production of carbide-coated blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59200766A JPS59200766A (en) | 1984-11-14 |
| JPH0346542B2 true JPH0346542B2 (en) | 1991-07-16 |
Family
ID=13568571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7517483A Granted JPS59200766A (en) | 1983-04-28 | 1983-04-28 | Production of carbide-coated blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59200766A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9103883D0 (en) * | 1991-02-25 | 1991-04-10 | Black & Decker Inc | Saw blades and method of making same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148440A (en) * | 1976-06-04 | 1977-12-09 | Brother Ind Ltd | Movable knife or stationary knife for work web cutter in sewing machine |
-
1983
- 1983-04-28 JP JP7517483A patent/JPS59200766A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148440A (en) * | 1976-06-04 | 1977-12-09 | Brother Ind Ltd | Movable knife or stationary knife for work web cutter in sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59200766A (en) | 1984-11-14 |
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