KR20050068506A - Method for making a blade and blade manufactured thereby - Google Patents
Method for making a blade and blade manufactured thereby Download PDFInfo
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- KR20050068506A KR20050068506A KR1020030100001A KR20030100001A KR20050068506A KR 20050068506 A KR20050068506 A KR 20050068506A KR 1020030100001 A KR1020030100001 A KR 1020030100001A KR 20030100001 A KR20030100001 A KR 20030100001A KR 20050068506 A KR20050068506 A KR 20050068506A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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Abstract
본 발명은 경량(輕量) 초경(超硬)합금으로 이루어져 높은 내마모성 및 경도를 유지하면서도 상대적으로 비중이 작은 경량 초경합금 칼날 소재의 제조방법 및 이에 따른 칼날 소재를 제공하고자 한 것으로서, 본 발명에 따르면, 100㎛이하의 입경을 갖는 탄화바나듐(VC)분말 40~80중량%와, 100㎛이하의 입경을 갖는 코발트분말(Co)을 20~60중량% 혼합하여 합계100중량%가 되는 혼합분말을 준비하는 단계, 상기 혼합분말을 성형금형에 충진한 후 프레스 가압하여 성형품을 얻는 단계, 상기 성형품을 1500℃ 이하의 온도에서 소결하는 단계를 포함하며, 상기 소결 성형품은 7이하의 비중을 갖는 것을 특징으로 하는 칼날 소재의 제조방법 및 상기 제조방법에 의하여 제조된 칼날 소재가 제공된다.The present invention is to provide a method of manufacturing a lightweight cemented carbide blade material and a blade material according to the present invention, which is made of a lightweight cemented carbide alloy and maintains high wear resistance and hardness while maintaining a relatively low specific gravity. 40 to 80% by weight of a vanadium carbide (VC) powder having a particle size of 100 µm or less and 20 to 60% by weight of cobalt powder (Co) having a particle size of 100 µm or less is added to 100% by weight in total. The method includes the steps of preparing, press-filling the mixed powder into a molding mold to obtain a molded article by pressing and sintering the molded article at a temperature of 1500 ° C. or less, and the sintered molded article has a specific gravity of 7 or less. Provided are a method for producing a blade material, and a blade material manufactured by the method.
Description
본 발명은 조리(條理)용 식칼이나 둥근 형상, 각 형상 등을 포함하는 각종 칼날류에 관한 것으로 특히, 경량이면서도 초경합금으로 이루어진 칼날소재 및 그 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various blades including a cooking knife, a round shape, a square shape, and the like, and more particularly, to a blade material made of cemented carbide and a light weight, and a manufacturing method thereof.
식칼이나 나이프, 둥근 형상의 회전칼, 각 형상의 면도칼 등 각종의 칼날류에 있어서 종래는 압연강판 등을 펀칭(punching)가공 한 후, 열처리경화하여 제조된 소재에 칼날형성가공을 행하여 칼날(커터)로 한 것이 대부분이었다.Knives, knives, round rotary knives, and razor blades of various shapes are conventionally punched into rolled steel sheets, and then subjected to heat treatment and hardening to form blades to form materials. Most of them were).
상기한 종래의 칼날류에 있어서는 칼날용 강(鋼)의 경도(硬度)를 향상시키는 방안이 시도되고 있지만, 종래 탄소강에서는 소입(燒入)시의 경도향상과 더불어 취성(脆性)이 증가하는 문제가 있었다. In the above-described conventional blades, a method of improving the hardness of the blade steel has been attempted. However, in the conventional carbon steel, the problem of brittleness increases with hardness improvement at the time of hardening. There was.
또한, 탄화텅스텐(WC)분말과 코발트(Co)분말을 주 구성요소로 한 분말소결 칼날소재도 존재하지만, 이러한 칼날 소재의 결점은 비중이 그 조성에 따라서 10~16으로 무거워서 사용 및 용도에 제한이 있다는 것이었다.In addition, although there are powder sintered blade materials mainly composed of tungsten carbide (WC) powder and cobalt (Co) powder, the defects of these blade materials are heavy, with specific gravity of 10 to 16, depending on their composition, thereby limiting their use and use. It was there.
본 발명은 상기한 문제점들을 해결하기 위해 제안된 것으로서, 경량 초경합금으로 이루어져서 높은 내마모성 및 경도를 유지하면서도 비중이 작은 칼날 소재의 제조방법 및 이에 따른 칼날 소재를 제공하는 것을 목적으로 한다. The present invention has been proposed to solve the above problems, an object of the present invention is to provide a method of producing a blade material and a blade material according to the specific gravity is made of a lightweight cemented carbide while maintaining high wear resistance and hardness.
상기한 본 발명의 목적은, 100㎛이하의 입경을 갖는 탄화바나듐(VC)분말 40~80중량%와, 100㎛이하의 입경을 갖는 코발트분말(Co)을 20~60중량% 혼합하여 합계100중량%가 되는 혼합분말을 준비하는 단계, 상기 혼합분말을 성형금형에 충진한 후 프레스 가압하여 성형품을 얻는 단계, 상기 성형품을 1500℃ 이하의 온도에서 소결하는 단계를 포함하며, 상기 소결 성형품은 7이하의 비중을 갖는 것을 특징으로 하는 칼날 소재의 제조방법 및 상기 제조방법에 의하여 제조된 칼날 소재를 제공함으로써 성취된다.The object of the present invention described above is 100 to 100% by mixing 20 to 60% by weight of vanadium carbide (VC) powder having a particle size of 100 μm or less and cobalt powder (Co) having a particle size of 100 μm or less. Preparing a powder by mixing the powder into a molding mold, press-pressing the mixed powder to obtain a molded product, and sintering the molded product at a temperature of 1500 ° C. or less. It is achieved by providing a method for producing a blade material characterized by having the following specific gravity and a blade material produced by the above production method.
또한 본 발명에 따르면, 상기 혼합분말의 총중량에 대하여 은분말을 0.3~3중량% 더 첨가하는 단계를 포함하는 것을 특징으로 한다.In addition, according to the invention, characterized in that it comprises the step of adding 0.3 to 3% by weight of silver powder relative to the total weight of the mixed powder.
또한, 본 발명에 따르면, 상기 혼합분말의 총중량에 대하여 티탄 또는 티탄합금분말을 30중량%이하 더 포함하는 것을 특징으로 한다.In addition, according to the present invention, the titanium powder or titanium alloy powder is further included in an amount of 30 wt% or less with respect to the total weight of the mixed powder.
이하, 본 발명의 일실시형태에 대하여 첨부된 도1 내지 도2를 참조하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described with reference to FIGS.
도1은 본 발명에 따른 일실시예인 조리용 식칼의 평면도이고, 도2는 본 발명에 따른 다른 실시예인 둥근형상의 회전 칼날의 사시도이다. 1 is a plan view of a cooking knife according to an embodiment of the present invention, Figure 2 is a perspective view of a round rotary blade of another embodiment according to the present invention.
도1에 도시된 조리용 식칼의 칼날소재(1)는 후술하는 본 발명에 따른 제조방법에 따라 형성된 후, 평면 연삭과 칼날끝을 얇게 하는 경사연삭을 거쳐, 칼날소재(1)의 최선단부에 칼날형성부(2)를 형성하여 완성한 것이다.The blade material 1 of the cooking knife shown in Fig. 1 is formed according to the manufacturing method according to the present invention to be described later, and then through the flat grinding and inclined grinding to thin the blade end, at the top end of the blade material 1 It is completed by forming the blade forming portion (2).
도2에 도시된 둥근형상의 회전 칼날소재(3)는 기계의 회전축에 장착되어 회전하게 되는 회전 칼날소재로서 회전축 삽입구멍(4)을 구비하며, 후술하는 본 발명에 따른 제조방법에 따라 형성한 후, 평면연삭을 거쳐 외주(外周) 가장자리의 주면(周面)에 칼날 형성 연삭을 실시함으로써 외주칼날 연삭부(5)를 형성하여 완성된 것이다.The round rotary blade material 3 shown in Figure 2 is a rotary blade material which is mounted on the rotary shaft of the machine to rotate and has a rotary shaft insertion hole 4, and is formed according to the manufacturing method according to the present invention to be described later The outer peripheral blade grinding portion 5 is formed by performing blade forming grinding on the main surface of the outer peripheral edge through planar grinding.
종래 탄소강 칼날소재의 소입시의 경도는 통상 HV-820·HRA84가 거의 상한 값으로서, 그 경도에 제한이 따르고, 이 때의 비중은 약8.5이다. 한편, WC-Co계 초경합금은 HV1800(HRA92)가 거의 상한 값인 반면, 비중은 약 10~16정도로 높다. The hardness at the time of the hardening of the conventional carbon steel blade material is HV-820 and HRA84 as a substantially upper limit, and the hardness is limited, and the specific gravity at this time is about 8.5. On the other hand, WC-Co-based cemented carbide is HV1800 (HRA92) is almost the upper limit, while the specific gravity is about 10 to 16 high.
본 발명에 있어서 상기한 실시예의 칼날소재의 제1 소재로서는 탄화바나듐(VC)을 사용한다. 탄화바나듐(VC)의 경도는 마이크로비커스 HV=2600으로서 보다 고(高)경도이며, 탄화바나듐과 코발트(Co)와의 결합소결체 비중은 그 조성에 따라 5~7로서 WC·Co 초경합금의 비중인 10~16에 비하여 약 1/2 ~ 1/3로 크게 경량화 시킬 수 있으므로 주재료로서 특히 적합하다. In this invention, vanadium carbide (VC) is used as a 1st raw material of the blade material of an Example mentioned above. The hardness of vanadium carbide (VC) is higher than that of MicroVickers HV = 2600, and the specific gravity of the sintered bond between vanadium carbide and cobalt (Co) is 5-7 depending on its composition. It is particularly suitable as a main material because it can be greatly reduced in weight by about 1/2 to 1/3 compared with ˜16.
또한, 본 발명에 따른 칼날소재는 종래의 WC-Co의 합금과 마찬가지로 액상소결방법에 의하여 제조되는 것으로서, 경질물질인 탄화바나듐분말과 결합금속인 코발트분말의 혼합분말을 가압성형 후 소결하면, 소결온도에서 코발트분말은 용융되고 탄화바나듐분말은 고체상태에서 용융된 코발트분말로 확산되며 코발트의 표면장력으로 인하여 성형소결체가 급히 수축하므로 전체적인 소결합금이 치밀하게 되는 이점이 있다. In addition, the blade material according to the present invention is manufactured by the liquid phase sintering method as in the conventional alloy of WC-Co, and sintered when the mixed powder of vanadium carbide powder, which is a hard material, and cobalt powder, which is a bonding metal, is pressed and molded. At the temperature, the cobalt powder is melted, and the vanadium carbide powder is diffused into the molten cobalt powder in the solid state, and the compacted sintered body shrinks rapidly due to the surface tension of the cobalt.
본 발명의 일실시형태인 도1 및 도2에 도시된 칼날소재의 제조방법에 대하여 설명한다.A method of manufacturing the blade material shown in Figs. 1 and 2, which is one embodiment of the present invention, will be described.
우선, 100㎛이하의 입경을 갖는 탄화바나듐(VC)분말을 40~80중량%와, 100㎛이하의 입경을 갖는 코발트분말(Co)을 20~60중량%을 혼합하여 합계100중량%가 되도록 혼합분말을 준비한다. First, 40 to 80% by weight of vanadium carbide (VC) powder having a particle size of 100 μm or less and 20 to 60% by weight of cobalt powder (Co) having a particle size of 100 μm or less are added so that the total weight is 100% by weight. Prepare the mixed powder.
본 발명에서, 탄화바나듐분말과 코발트 분말의 입경을 100㎛이하로 설정한 것은, 금속분말 입경이 100㎛를 초과할 경우, 입경의 증가에 따라 소결결합된 합금의 경도가 저하되기 때문이다.In the present invention, the particle size of the vanadium carbide powder and the cobalt powder is set to 100 µm or less because when the particle diameter of the metal powder exceeds 100 µm, the hardness of the sintered alloy decreases as the particle diameter increases.
또한, 본 발명에서 탄화바나듐의 조성비율을 40~80중량%로 설정한 것은, 혼합분말의 총 중량 대하여 탄화바나듐분말의 함량이 40중량%이하(즉 코발트분말 함량이 60중량%이상)이면 탄화바나듐의 함량감소로 내마모성이 낮아지거나 경도가 작아지는 동시에 코발트분말의 함량증가로 비중이 증가하는 문제점이 있기 때문이다. In the present invention, the composition ratio of vanadium carbide is set to 40 to 80% by weight, when the content of the vanadium carbide powder is 40% by weight or less (that is, the content of cobalt powder is 60% by weight or more) based on the total weight of the mixed powder. This is because a decrease in the content of vanadium decreases abrasion resistance or hardness and at the same time increases the specific gravity due to an increase in the content of cobalt powder.
또한, 탄화바나듐분말의 함량이 80중량%이상(즉, 코발트분말 함량이 20중량%이하)이면 탄화바나듐분말의 함량과다로 경도가 지나치게 높아져 취성(脆性)이 증가하는 문제가 생긴다. In addition, when the content of the vanadium carbide powder is 80% by weight or more (that is, the cobalt powder content is 20% by weight or less), the hardness is excessively high due to the excessive content of the vanadium carbide powder, thereby causing a problem of increasing brittleness.
다음으로, 상기한 배합조정을 갖는 탄화바나듐분말과 코발트분말의 혼합분말을 소망형상의 성형금형에 충진한 후, 제곱센티미터(㎠)당 10t의 가압력으로 프레스 성형하여 성형품을 얻는다. Next, a mixed powder of vanadium carbide powder and cobalt powder having the above-mentioned mixing adjustment is filled into a mold of a desired shape, and then press-molded at a pressing force of 10 t per square centimeter (cm 2) to obtain a molded article.
상기 성형품은 금형으로부터 꺼내어 진공로(眞空爐)에서 1500℃ 이하의 온도, 바람직하게는 1300℃정도에서 소결하여 도1에 도시된 것과 같은 조리용 식칼의 칼날소재(1) 또는 도2에 도시된 것과 같은 둥근 형상의 회전 칼날소재(3)를 얻는다.The molded article is removed from the mold and sintered at a temperature of 1500 ° C. or lower, preferably about 1300 ° C. in a vacuum furnace, and the blade material 1 of a cooking knife as shown in FIG. 1 or shown in FIG. 2. The rotary blade material 3 of the round shape like this is obtained.
상기한 방법에 따라 제조된 소결 성형품은 혼합분말의 총중량에 대하여 탄화바나듐 분말이 40중량%, 코발트 분말이 60중량%일 때, 약6.8의 비중을 갖게 된다. 종래의 WC-Co의 합금에 있어서는 탄화텅스텐(WC)분말이 40중량%, 코발트분말이 60중량%일 때, 약9,8의 비중을 갖게 되므로, 칼날소재로서의 텅스텐분말과 동일한 조성비율로 바나듐분말을 코발트 분말과 혼합하였을 때, 경도 향상은 물론 비중이 저하됨을 알 수 있다.The sintered molded article prepared according to the above method has a specific gravity of about 6.8 when the vanadium carbide powder is 40% by weight and the cobalt powder is 60% by weight based on the total weight of the mixed powder. In the conventional alloy of WC-Co, when the tungsten carbide (WC) powder is 40% by weight and the cobalt powder is 60% by weight, it has a specific gravity of about 9,8. Therefore, vanadium is used in the same composition ratio as the tungsten powder as the blade material. When the powder is mixed with the cobalt powder, it can be seen that the specific gravity decreases as well as the hardness.
또한, 본 발명에 따른 소결 성형품은 혼합분말의 총중량에 대하여 탄화바나듐 분말이 80중량%, 코발트분말이 20중량%였을 때, 약5.6의 비중을 갖게 된다. 한편, 종래의 WC-Co의 합금에 있어서는 탄화텅스텐(WC)분말이 80중량%, 코발트분말이 20중량%일 때, 약13.6의 비중을 갖게 되므로, 칼날소재로서의 텅스텐분말과 동일한 조성비율로 바나듐분말을 코발트 분말과 혼합하였을 때, 경도 향상은 물론 비중이 저하됨을 알 수 있다.In addition, the sintered molded article according to the present invention has a specific gravity of about 5.6 when the vanadium carbide powder is 80% by weight and the cobalt powder is 20% by weight based on the total weight of the mixed powder. On the other hand, in the conventional alloy of WC-Co, when the tungsten carbide (WC) powder is 80% by weight and the cobalt powder is 20% by weight, it has a specific gravity of about 13.6. Therefore, vanadium is used in the same composition ratio as the tungsten powder as the blade material. When the powder is mixed with the cobalt powder, it can be seen that the specific gravity decreases as well as the hardness.
본 발명의 제2실시예로서는 칼날소재의 항균성 및 위생성을 향상시키기 위해 제3소재로서 은 분말을 상기한 제1소재, 제2소재의 혼합분말에 첨가하는 것을 요지로 한다. As a second embodiment of the present invention, in order to improve the antibacterial and hygienic properties of the blade material, it is essential to add silver powder as the third material to the mixed powder of the first material and the second material.
경량 초경합금 칼날소재로서 예를 들면, 조리용 식칼이나 둥근형상 칼날소재를 제조하고 이것을 가지고 동,식물 등의 식품류절단용 칼날로 사용할 때에, 작업도구의 영구절단성능 외에도 위생성의 유지가 요망된다. 이를 위해 식품절단용으로 사용되는 경우에 있어서는 본 발명의 경량 초경합금 칼날소재에 은을 첨가한다.As a lightweight cemented carbide blade material, for example, a cooking knife or a round blade material is manufactured and used as a cutting blade for cutting foods such as copper and plants, it is desirable to maintain hygiene in addition to the permanent cutting performance of the work tool. To this end, when used for food cutting, silver is added to the lightweight cemented carbide blade material of the present invention.
경량 초경합금 칼날소재에 은을 첨가하게 되면, 은 이온에 의한 항균성능을 칼날소재에 부여할 수 있게 되므로, 절단된 육류의 혈액이나 육편(肉片)에 의해 칼날이 오염된 경우라도, 은 이온에 의한 항균성 및 자기 정화기능으로 인해, 칼날소재의 위생성을 유지하는 데에 바람직하다.When silver is added to the lightweight cemented carbide blade material, the antimicrobial performance of silver ions can be imparted to the blade material. Therefore, even if the blade is contaminated by the cut meat blood or meat pieces, Due to the antimicrobial and self-cleaning functions, it is desirable to maintain the hygiene of the blade material.
은 분말을 탄화바나듐분말과 코발트분말의 혼합분말에 혼합함에 있어서, 혼합분말의 총 중량에 대하여 은 분말이 0.3중량%이하일 경우에는 은 이온에 의한 항균성능을 기대하기 어려우며, 3중량%정도까지는 양호한 항균성능을 얻을 수 있으나, 3중량% 이상일 경우에는 항균성능의 더 이상의 증가를 기대하기 어려우므로, 비용면에서도 불리하다.When silver powder is mixed with vanadium carbide powder and cobalt powder mixed powder, when silver powder is 0.3% by weight or less based on the total weight of the mixed powder, antibacterial performance by silver ions is hardly expected, and up to about 3% by weight is good. Although antimicrobial performance can be obtained, if it is 3% by weight or more, it is difficult to expect further increase in antimicrobial performance, which is disadvantageous in terms of cost.
한편, 본 발명에서 코발트분말은 탄화바나듐분말을 소결결합하기 위한 매트릭스 결합재로서 채용되는 것이므로, 코발트 분말과 마찬가지로 결합재의 역할을 하는 티탄(Ti)분말 또는 티탄합금분말을 상기 혼합분말에 더 포함하는 것도 바람직하다. 티탄(Ti)은 비중이 6.3~6.5로 코발트 분말의 비중 보다 더 작으므로 칼날소재의 비중을 더욱 낮출수 있어 바람직하다.Meanwhile, in the present invention, since the cobalt powder is employed as a matrix binder for sintering vanadium carbide powder, the cobalt powder may further include titanium (Ti) powder or titanium alloy powder, which acts as a binder like cobalt powder, in the mixed powder. desirable. Since titanium (Ti) has a specific gravity of 6.3 to 6.5, which is smaller than that of cobalt powder, the specific gravity of the blade material can be further lowered.
본 명세서에서 티탄합금분말이라는 것은 예를 들어, Ti-15V-3Al-3Cr-3Sn (15-3) 합금 (즉, 티탄성분 76중량%), Ti-6Al-2Sn-4Zr-2Mo (6-2-4-2)합금 (즉, 티탄성분 86중량%), Ti-6Al-4V합금분말(즉 티탄성분 90중량%)와 같이, 티탄성분을 70중량%이상 함유하는 티탄합금류를 지칭한다. In the present specification, the titanium alloy powder is, for example, Ti-15V-3Al-3Cr-3Sn (15-3) alloy (ie, titanium component 76% by weight), Ti-6Al-2Sn-4Zr-2Mo (6-2 -4-2) Titanium alloys containing 70% by weight or more of titanium components, such as alloys (ie, titanium components 86% by weight) and Ti-6Al-4V alloy powder (ie, titanium components 90% by weight), are referred to.
티탄분말또는 티탄합금분말을 탄화바나듐분말과 코발트 분말의 혼합분말에 첨가하는 경우 혼합분말의 총중량에 대하여 30중량%이하로 첨가한다. When titanium powder or titanium alloy powder is added to the mixed powder of vanadium carbide powder and cobalt powder, it is added below 30% by weight based on the total weight of the mixed powder.
탄화바나듐과 코발트 분말을 소결할 때에는 상술한 바와 같이, 액상소결방법에 의하여 제조되어 합금조직이 치밀화되는 효과를 얻을 수 있는 것이나, 티탄 또는 티탄합금분말은 탄화바나듐과 고상소결상태를 이루므로 티탄함량이 30중량%이상이 되면 티탄함량의 과다로 코발트분말에 의한 액상소결합금의 이점을 얻기가 곤란하다.When sintering vanadium carbide and cobalt powder, as described above, it is produced by the liquid phase sintering method to obtain the effect of densification of the alloy structure, but titanium or titanium alloy powder forms a solid phase sintered state with vanadium carbide If it is more than 30% by weight, it is difficult to obtain the advantages of the liquid sintered alloy by cobalt powder due to the excessive amount of titanium.
상기한 바와 같이, 본 발명에 따르면, 고 경도이면서도 저 비중을 유지하는 경량 초경합금 칼날소재를 얻는 것이 가능하게 된다. 더욱이 동일한 체적으로 보다 작은 중량의 칼날소재를 제조하는 것이 가능하게 되므로, 제품경량화에 따른 기계장치에서의 칼날운전 동력의 경감(輕減)의 효과 등을 아울러 가질 수 있게 된다.As described above, according to the present invention, it becomes possible to obtain a lightweight cemented carbide blade material that maintains high hardness and low specific gravity. Furthermore, since it is possible to manufacture a blade material of a smaller weight with the same volume, it is possible to have the effect of reducing the blade driving power in a mechanical device according to the weight reduction of the product.
도1은 본 발명에 따른 일실시예인 조리용 식칼의 평면도.1 is a plan view of a kitchen knife for one embodiment according to the present invention.
도2는 본 발명에 따른 다른 실시예인 둥근형상의 회전 칼날의 사시도.Figure 2 is a perspective view of a round rotary blade of another embodiment according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1: 칼날소재 2: 칼날형성부1: blade material 2: blade forming part
3: 칼날소재 4: 회전축 삽입구멍3: blade material 4: rotary shaft insertion hole
5: 외주 칼날 연삭부5: outer edge grinding part
Claims (4)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030100001A KR20050068506A (en) | 2003-12-30 | 2003-12-30 | Method for making a blade and blade manufactured thereby |
| US10/782,776 US20050142020A1 (en) | 2003-12-30 | 2004-02-23 | Method for making a blade material and blade material manufactured thereby |
| EP04290526A EP1550732A2 (en) | 2003-12-30 | 2004-02-26 | Method for making a blade material and blade material manufactured thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030100001A KR20050068506A (en) | 2003-12-30 | 2003-12-30 | Method for making a blade and blade manufactured thereby |
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| Publication Number | Publication Date |
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| KR20050068506A true KR20050068506A (en) | 2005-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020030100001A KR20050068506A (en) | 2003-12-30 | 2003-12-30 | Method for making a blade and blade manufactured thereby |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20050142020A1 (en) |
| EP (1) | EP1550732A2 (en) |
| KR (1) | KR20050068506A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130085902A (en) * | 2011-11-29 | 2013-07-30 | 가부시키가이샤 포에버 | Blade containing diamond particles |
| KR20200004668A (en) | 2018-07-04 | 2020-01-14 | (주)우석엔지니어링 | Method for manufacturing multi-layer material for blade having excellent corrosion resistance using conventional copper alloy material |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070169605A1 (en) * | 2006-01-23 | 2007-07-26 | Szymanski David A | Components having sharp edge made of sintered particulate material |
| US7836808B2 (en) * | 2006-01-23 | 2010-11-23 | Szymanski David A | Safety chain and rotational devices and replaceable teeth therefor |
| CH701324A1 (en) * | 2009-06-16 | 2010-12-31 | Hatebur Umformmaschinen Ag | Shearing device for shearing bar material and forming machine with a shearing device for shearing bar stock. |
| CN102864413B (en) * | 2012-09-26 | 2014-07-30 | 中国科学院宁波材料技术与工程研究所 | V-C-Co flexible coating with nano composite structure and preparation method of V-C-Co flexible coating |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IE47393B1 (en) * | 1977-09-12 | 1984-03-07 | De Beers Ind Diamond | Abrasive materials |
| JPS5856018B2 (en) * | 1979-11-30 | 1983-12-13 | 日本油脂株式会社 | High-density phase boron nitride composite sintered body for cutting tools and its manufacturing method |
| US4923490A (en) * | 1988-12-16 | 1990-05-08 | General Electric Company | Novel grinding wheels utilizing polycrystalline diamond or cubic boron nitride grit |
| KR100550235B1 (en) * | 2003-07-28 | 2006-02-08 | 히라이 아키라 | Method for making a blade and Blade manufactured thereby |
-
2003
- 2003-12-30 KR KR1020030100001A patent/KR20050068506A/en not_active Application Discontinuation
-
2004
- 2004-02-23 US US10/782,776 patent/US20050142020A1/en not_active Abandoned
- 2004-02-26 EP EP04290526A patent/EP1550732A2/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130085902A (en) * | 2011-11-29 | 2013-07-30 | 가부시키가이샤 포에버 | Blade containing diamond particles |
| KR20200004668A (en) | 2018-07-04 | 2020-01-14 | (주)우석엔지니어링 | Method for manufacturing multi-layer material for blade having excellent corrosion resistance using conventional copper alloy material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1550732A2 (en) | 2005-07-06 |
| US20050142020A1 (en) | 2005-06-30 |
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