KR100550235B1 - Method for making a blade and Blade manufactured thereby - Google Patents

Method for making a blade and Blade manufactured thereby Download PDF

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Publication number
KR100550235B1
KR100550235B1 KR1020030051950A KR20030051950A KR100550235B1 KR 100550235 B1 KR100550235 B1 KR 100550235B1 KR 1020030051950 A KR1020030051950 A KR 1020030051950A KR 20030051950 A KR20030051950 A KR 20030051950A KR 100550235 B1 KR100550235 B1 KR 100550235B1
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powder
blade
specific gravity
blade material
weight
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KR1020030051950A
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Korean (ko)
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KR20050013329A (en
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료타 쿠사나기
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히라이 아키라
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Priority to KR1020030051950A priority Critical patent/KR100550235B1/en
Priority to US10/683,249 priority patent/US20050025655A1/en
Priority to JP2003393424A priority patent/JP2005048276A/en
Priority to EP04290527A priority patent/EP1502967A1/en
Priority to CNA2004100069056A priority patent/CN1575891A/en
Publication of KR20050013329A publication Critical patent/KR20050013329A/en
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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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B25/00—Hand cutting tools involving disc blades, e.g. motor-driven

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Knives (AREA)
  • Nonmetal Cutting Devices (AREA)

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, 6이하의 비중을 갖는 탄화바나듐(VC)분말 (제1소재) 50~90중량%, 6이하의 비중을 갖는 티탄(Ti) 또는 티탄(Ti)합금분말 (제2소재)를 10~50중량% 혼합하여 상기 제1, 제2 소재의 혼합분말을 준비하는 단계, 상기 혼합분말을 성형금형에 충진한 후 프레스 가압하여 성형품을 얻는 단계, 상기 성형품을 1500℃ 이하의 온도에서 소결하는 단계를 포함하며, 상기 소결 성형품은 HRA81(HV700)이상의 경도 및 6이하 비중을 갖는 것을 특징으로 하는 칼날 소재의 제조방법 및 상기 제조방법에 의하여 제조된 경량 초경합금 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. 50 to 90% by weight of vanadium carbide (VC) powder having a specific gravity of 6 or less (first material), 10 to 50 titanium (Ti) or titanium (Ti) alloy powder (second material) having a specific gravity of 6 or less Preparing a mixed powder of the first and second materials by mixing by weight%, filling the mixed powder into a molding mold and pressing and obtaining a molded article, and sintering the molded article at a temperature of 1500 ° C. or below. It includes, the sintered molded article is provided with a method of producing a blade material, characterized in that having a hardness of HRA 81 (HV700) or more and less than 6, and a lightweight cemented carbide blade material produced by the manufacturing method.

Description

칼날소재의 제조방법 및 그에 의한 칼날소재{Method for making a blade and Blade manufactured thereby}Method for manufacturing blade material and blade material according thereto {Method for making a blade and Blade manufactured thereby}

도 1은 본 발명에 따른 칼날소재 제조방법에 의해 제조된 둥근형상 칼날의 사시도. 1 is a perspective view of a round blade formed by the blade material manufacturing method according to the present invention.

도 2는 도1의 칼날소재의 단면도.2 is a cross-sectional view of the blade material of FIG.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1: 회전축 삽입구멍1: rotary shaft insertion hole

2: 외주 칼날 연삭부2: outer edge grinding part

3: 평면 연삭부3: flat grinding part

본 발명은 조리(條理)용 식칼이나 둥근 형상, 각 형상을 포함하는 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 a knife for cooking, a round shape, and a blade including each shape, and more particularly, to a blade material made of cemented carbide and a light weight, and a method of manufacturing the same.

식칼이나 나이프, 둥근 형상의 회전칼, 각 형상의 면도칼 등에 있어서 종래는 압연강판 등을 펀칭(punching)가공 한 후, 열처리경화하여 제조된 소재에 칼날 형성가공을 행하여 칼날(커터)로 한 것이 대부분이었다.Knives, knives, round rotary knives, razor blades of each shape, and the like, in the past, after punching (rolling) a rolled steel sheet or the like, a blade forming process is performed on a material manufactured by heat-hardening to form a blade (cutter). It was.

상기한 종래의 칼날류에 있어서, 제1의 성능으로서 영구절단성이 요망되고 있다. 이를 위해서 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, permanent cutting property is desired as the first performance. To this end, a method of improving the hardness of blade steel has been attempted, but conventional carbon steel has a problem in that brittleness increases with hardness improvement at the time of hardening.

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, there are powder sintered blade materials mainly composed of tungsten carbide (WC) powder and cobalt (CO) powder, but the defects of these blade materials are heavy, with specific gravity of 10 to 16, depending on their composition. 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 하는 것으로서, 본 발명에 따르면, 6이하의 비중을 갖는 탄화바나듐(VC)분말 (제1소재) 50~90중량%, 6이하의 비중을 갖는 티탄(Ti) 또는 티탄(Ti)합금분말 (제2소재)를 10~50중량% 혼합하여 상기 제1, 제2 소재의 혼합분말을 준비하는 단계, 상기 혼합분말을 성형금형에 충진한 후 프레스 가압하여 성형품을 얻는 단계, 상기 성형품을 1500℃ 이하의 온도에서 소결하는 단계를 포함하며, 상기 소결 성형품은 HRA81(HV700)이상의 경도 및 6이하 비중을 갖는 것을 특징으로 하는 칼날 소재의 제조방법 및 상기 제조방법에 의하여 제조된 칼날 소재가 제공된다.The present invention has been proposed to solve the above problems, it is made of a lightweight cemented carbide, while maintaining a high wear resistance and hardness, and to provide a method for producing a blade material with a small specific gravity and accordingly to the present invention, According to the present invention, the vanadium carbide (VC) powder having a specific gravity of 6 or less is 50 to 90% by weight, and the titanium (Ti) or titanium (Ti) alloy powder (second material) having a specific gravity of 6 or less is 10 to Preparing a mixed powder of the first and second materials by mixing 50% by weight, filling the mixed powder into a molding mold, and pressing and obtaining a molded article, and sintering the molded article at a temperature of 1500 ° C. or less. To include, wherein the sintered molded article has a hardness of HRA 81 (HV700) or more and a specific gravity of 6 or less, and a blade material manufactured by the method It is.

본 발명의 일 실시형태에 대하여 첨부된 도1 내지 도2를 참조하여 설명한다.An embodiment of the present invention will be described with reference to FIGS.

도1은 본 발명에 따른 칼날소재의 제조방법에 의해 제조된 일실시형태인 둥근형상 칼날의 사시도이고, 도2는 도1에 도시된 둥근형상 칼날의 단면도이다.1 is a perspective view of a round blade which is one embodiment manufactured by a method for manufacturing a blade material according to the present invention, and FIG. 2 is a cross-sectional view of the round blade shown in FIG.

상기 실시예에 있어서는 칼날소재의 주 재료로서 탄화바나듐(VC)을 사용한다. 종래 분말소결 칼날소재로서의 탄화텅스텐(WC)의 경도는 마이크로 비커스 HV=약1780인데 비하여, 본 발명에 있어서 주재료인 탄화바나듐(VC)의 경도는 마이크로비커스 HV=2600으로서, 보다 고(高)경도이고, 더욱이, 상기 탄화바나듐과 티탄(Ti) 또는 티탄(Ti) 합금과의 결합소결체 비중은 그 조성에 따라 비중이 5~6로서 WC·CO 초경합금의 비중인 10~16에 비하여 약 1/2 ~ 1/3로 크게 경량화 시킬 수 있으므로 주재료로서 특히 적합하다.In this embodiment, vanadium carbide (VC) is used as the main material of the blade material. While the hardness of tungsten carbide (WC) as a powder sintered blade material is micro-Vickers HV = about 1780, the hardness of vanadium carbide (VC) as the main material in the present invention is micro-Vickers HV = 2600, and higher hardness. In addition, the specific gravity of the combined sintered body of the vanadium carbide and titanium (Ti) or titanium (Ti) alloy is 5 to 6 specific gravity, depending on the composition, about 1/2 to 10 to 16 specific gravity of WC · CO cemented carbide. It is particularly suitable as a main material because it can be greatly reduced to ˜1 / 3.

한편, 종래 탄소강 칼날소재의 소입시의 경도는 통상 HV-820·HRA 84가 거의 상한 값으로서 그 경도에 제한이 따르고, 이 때의 비중은 약8.5이다. 한편, WC-CO계 초경합금은 HV1800(HRA92)가 거의 상한 값인 반면, 비중은 약15정도로 된다. 이에 대하여 본 발명의 주 재료인 탄화바나듐(VC)의 경도는 HV2600으로 매우 고경도이면서도 그 비중은 6정도로 가벼워서, 칼날소재의 경량화 및 고(高) 경도화를 실현하는 데에 적합하다.On the other hand, the hardness at the time of the hardening of the conventional carbon steel blade material is HV-820 and HRA 84 as an almost upper limit, and the hardness is limited, and the specific gravity at this time is about 8.5. On the other hand, the WC-CO cemented carbide is HV1800 (HRA92) almost the upper limit, while the specific gravity is about 15. In contrast, the hardness of vanadium carbide (VC), which is the main material of the present invention, is HV2600, which is very hard, and its specific gravity is about 6, so that the blade material is light in weight and high in hardness.

본 발명의 일실시형태인 도1 및 도2의 둥근형상의 칼날소재의 제조방법에 대하여 설명한다.The manufacturing method of the round blade material of FIG. 1 and FIG. 2 which is one Embodiment of this invention is demonstrated.

우선, 6이하의 비중을 갖는 탄화바나듐(VC)분말을 제1소재로 하여 50~90중량%를 준비하고, 6이하의 비중을 갖는 티탄(Ti) 또는 티탄(Ti)합금분말을 제2소재로 하여 10~50중량% 준비한 후, 상기 제1, 제2 소재를 혼합하여 혼합분말을 준비한다. First, 50 to 90% by weight of vanadium carbide (VC) powder having a specific gravity of 6 or less is prepared as the first material, and titanium (Ti) or titanium (Ti) alloy powder having a specific gravity of 6 or less is used as the second material. After preparing 10 to 50% by weight, the first and second materials are mixed to prepare a mixed powder.

여기서, 탄화바나듐의 중량%를 50~90중량%로 설정한 것은, 혼합분말의 총 중량 대하여 탄화바나듐의 함량이 50중량%이하이면 마모성이 낮아지거나 경도가 작아지는 문제점이 있고, 90중량%이상이면 경도가 지나치게 높아져 취성(脆性)이 증가하는 문제가 생기기 때문이다.Here, when the weight percent of vanadium carbide is set to 50 to 90 wt%, when the content of vanadium carbide is 50 wt% or less with respect to the total weight of the mixed powder, there is a problem that wearability is lowered or hardness is reduced, and 90 wt% or more. This is because the hardness becomes excessively high, so that brittleness increases.

다음으로, 상기한 배합조정을 갖는 상기 탄화바나듐(제1소재)분말과 티탄 또는 티탄합금분말(제2소재)의 혼합분말을 소망형상의 성형금형에 충진한 후, 제곱센티미터(㎠)당 10t의 가압력으로 프레스 성형하여 성형품을 얻는다. Next, after mixing the powder mixture of the vanadium carbide (first material) powder and titanium or titanium alloy powder (second material) having the above-described mixing into a desired mold, 10t per square centimeter (cm 2) Press-molded at a pressing force of 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 둥근 형상의 칼날소재를 얻는다.The molded article is taken out of the mold and sintered at a temperature of 1500 ° C. or lower, preferably about 1300 ° C. in a vacuum furnace to obtain a round blade material as shown in FIG. 1.

도1 및 도2에 도시된 칼날 소재는 기계의 회전축에 장착되어 회전하게 되는 회전 칼날소재로서 회전축 삽입구멍(1)을 구비하며, 평면연삭에 의해 소망 두께를 가진 평면 연삭부(3)를 형성한 후에, 그 외주(外周) 가장자리의 주면(周面)에 칼날 형성 연삭을 실시함으로써 외주칼날 연삭부(2)를 형성하여 완성된다.The blade material shown in Figs. 1 and 2 is a rotary blade material which is mounted on the rotating shaft of the machine and rotates, and includes a rotating shaft insertion hole 1, and forms a flat grinding portion 3 having a desired thickness by plane grinding. After that, blade forming grinding is performed on the main surface of the outer circumference to form the outer circumferential blade grinding portion 2, which is completed.

상기 소결 성형품은 혼합분말의 총중량에 대하여 탄화바나듐이 50중량%일때, 약 HRA81(HV700)의 경도를 갖게 된다.The sintered molded article has a hardness of about HRA81 (HV700) when vanadium carbide is 50% by weight based on the total weight of the mixed powder.

본 발명의 제2실시예로서는 칼날소재의 항균성 및 위생성을 향상시키기 위해 제3소재로서 은 분말을 상기한 제1소, 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, 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 칼날재료에 경량 초경합금 칼날소재에 은을 첨가한다.As a lightweight cemented carbide blade material, for example, when producing a round blade material and using it as a blade for cutting foods such as copper and plants, it is desirable to maintain hygiene in addition to the permanent cutting performance of work tools. To this end, when used for food cutting, silver is added to the lightweight cemented carbide blade material to the blade material of the present invention.

경량 초경합금 칼날소재에 은을 첨가하게 되면, 은 이온에 의한 항균성능은 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 antibacterial performance by silver ions can be imparted to the blade material. Therefore, even when 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 탄화바나듐분말, 티탄 또는 티탄합금분말에 혼합함에 있어서, 탄화바나듐, 티탄 또는 티탄합금 분말 및 은 분말의 혼합분말 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.In mixing silver powder with vanadium carbide powder, titanium or titanium alloy powder, antibacterial performance by silver ions when silver powder is 0.3% by weight or less relative to the total weight of the mixed powder of vanadium carbide, titanium or titanium alloy powder and silver powder It is difficult to expect a good antibacterial performance can be obtained up to about 3% by weight, but if more than 3% by weight is difficult to expect further increase in antibacterial performance, it is disadvantageous in terms of cost.

한편, 본 발명에서 제1소재인 탄화바나듐(VC)은 고 경도와 경량성에 의해 경량초경합금 소재의 주 재료를 이루는 것이나, 제2의 소재인 티탄은 제1의 소재입자를 전체적 결합체로 하여 소결시키기 위한 결합재로서 작용을 한다. 따라서, 필요한 경우 제2의 소재로서, 티탄(Ti)분말 대신에 코발트(CO)분말을 이용하여 티탄(Ti) 분말과 마찬가지로 VC분말과 혼합성형 소결함으로써 경량 초경합금 칼날소재를 얻을 수도 있다.Meanwhile, in the present invention, vanadium carbide (VC), which is a first material, forms a main material of a light cemented carbide alloy by high hardness and lightness, but titanium, which is a second material, is sintered using the first material particles as a whole binder. It acts as a binder for. Therefore, if necessary, a lightweight cemented carbide blade material can be obtained by mixing and sintering with a VC powder in the same manner as the titanium (Ti) powder using a cobalt (CO) powder instead of a titanium (Ti) powder.

코발트의 비중은 약8.9로서 비교적 무거우나, 탄화바나듐과의 배합량 조절에 따라 최종적으로 제품비중을 약 7이하 정도로 하는 것이 가능하므로, 제1실시예에서와 마찬가지로 VC·CO 초경합금의 비중을 대폭으로 저하시키는 결과를 얻을 수 있게 된다. The specific gravity of cobalt is about 8.9, which is relatively heavy. However, it is possible to finally reduce the specific product weight to about 7 or less by adjusting the blending amount with vanadium carbide. Thus, as in the first embodiment, the specific gravity of the VC / CO cemented carbide is greatly reduced. You will get results.

상기한 바와 같이, 본 발명에 따르면, 고 경도이면서도 저 비중을 유지하는 경량 초경합금 칼날소재를 얻는 것이 가능하게 된다. 더욱이 동일한 중량으로 보다 적은 용적의 칼날소재를 또는 동일한 용적으로 보다 적은 중량의 칼날소재를 제조하는 것이 가능하게 되므로, 원재료 및 비용 절감, 제품의 소형화로 인한 제조의 용이, 제품경량화에 따른 기계장치에서의 칼날운전 동력의 운전동력의 경감(輕減)의 효과를 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. In addition, it is possible to manufacture a blade material of less volume with the same weight or a blade material of less weight with the same volume, thereby reducing raw materials and cost, ease of manufacture due to miniaturization of the product, and in a machine according to weight reduction. It is possible to have the effect of reducing the driving power of the blade driving power of.

Claims (4)

6이하의 비중을 갖는 탄화바나듐(VC)분말 (제1소재) 50~90중량%, 코발트분말 (제2소재)을 10~50중량% 혼합하여 상기 제1, 제2 소재의 혼합분말을 준비하는 단계,50 to 90% by weight of vanadium carbide (VC) powder (first material) and 10 to 50% by weight of cobalt powder (second material) having a specific gravity of 6 or less are prepared to prepare a mixed powder of the first and second materials. Steps, 상기 혼합분말을 성형금형에 충진한 후 프레스 가압하여 성형품을 얻는 단계,Filling the molding powder with a molding die and then pressing to obtain a molded article; 상기 성형품을 1500℃ 이하의 온도에서 소결하는 단계를 포함하며,Sintering the molded article at a temperature of 1500 ° C. or less, 상기 소결 성형품은 HRA81(HV700)이상의 경도 및 7이하 비중을 갖는 것을 특징으로 하는 칼날 소재의 제조방법.The sintered molded article has a hardness of HRA 81 (HV700) or more and a specific gravity of less than 7, the method of manufacturing a blade material. 제1항에 있어서, 상기 혼합분말에 은분말을 첨가하여, 상기 은분말이 상기 혼합분말과 은분말의 총중량에 대하여 0.3~3중량%가 되는 단계를 더 포함하는 것을 특징으로 하는 칼날 소재의 제조방법.The method of claim 1, further comprising adding a silver powder to the mixed powder, wherein the silver powder is 0.3 to 3% by weight based on the total weight of the mixed powder and the silver powder. . 삭제delete 제1항 또는 제2항에 기재된 칼날 소재의 제조방법에 의하여 제조된 칼날 소재.The blade material manufactured by the manufacturing method of the blade material of Claim 1 or 2.
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