KR100872764B1 - A gear manufacturing method which uses powder metallurgy - Google Patents

A gear manufacturing method which uses powder metallurgy Download PDF

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KR100872764B1
KR100872764B1 KR1020060127149A KR20060127149A KR100872764B1 KR 100872764 B1 KR100872764 B1 KR 100872764B1 KR 1020060127149 A KR1020060127149 A KR 1020060127149A KR 20060127149 A KR20060127149 A KR 20060127149A KR 100872764 B1 KR100872764 B1 KR 100872764B1
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mold
gear
metal powder
heat treatment
molded article
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KR1020060127149A
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Korean (ko)
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KR20080054692A (en
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김남석
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(주)세원피엠텍
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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
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • 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
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment

Abstract

본 발명은 Ni, Cu, Mo, C, Mns, 윤활제가 함유된 금속분말을 일정 온도로 가열하여 금형에 주입한 후 가압장치로 가압성형한 다음 소결과 열처리 및 가공과정을 거쳐 기어를 성형할 수 있도록 한 분말야금을 이용한 기어제조방법에 관한 것이다.According to the present invention, a metal powder containing Ni, Cu, Mo, C, Mns, and a lubricant is heated to a predetermined temperature, injected into a mold, press-molded by a pressure device, and then the gear can be formed through sintering, heat treatment, and processing. The present invention relates to a gear manufacturing method using powder metallurgy.

상기한 목적을 달성하기 위한 본 발명은 주원료와 첨가물을 배합하여 금속분말을 형성하는 혼합단계와, 상기 금속분말과 금형에 열을 가하는 예열단계와, 가열된 상기 금속분말을 금형에 투입하여 상기 금형의 가압에 의해 성형품을 제작하는 성형단계와, 상기 성형단계를 거쳐 완성된 성형품에 일정한 온도를 열을 가하는 소결단계와, 상기 소결단계를 거친 성형품에 강도를 부여하는 열처리단계와, 상기 열처리를 거친 성형품의 표면을 연마하는 가공단계로 이루어지는 것을 특징으로 한다.The present invention for achieving the above object is a mixing step of forming a metal powder by mixing the main raw materials and additives, a preheating step of applying heat to the metal powder and the mold, and put the heated metal powder into a mold A molding step of producing a molded article by pressing, a sintering step of applying a constant temperature to the molded article completed through the molding step, a heat treatment step of giving strength to the molded article subjected to the sintering step, and the heat treatment Characterized in that the processing step of polishing the surface of the molded article.

분말야금, 기어, 소결, 금형 Powder metallurgy, gear, sintering, mold

Description

분말야금을 이용한 기어제조방법{A gear manufacturing method which uses powder metallurgy} A gear manufacturing method which uses powder metallurgy

도 1은 본 발명에 따른 분말야금을 이용한 기어제조방법의 순서도.1 is a flow chart of the gear manufacturing method using a powder metallurgy according to the present invention.

도 2는 본 발명에 따른 공정에 의해 생산된 기어를 보인 사시도.Figure 2 is a perspective view of a gear produced by the process according to the invention.

[도면의 주요 부분에 대한 부호의 설명][Description of Symbols for Main Parts of Drawing]

1 ; 기어 2 : 몸체One ; Gear 2: body

3 : 기어치 4 : 경도 측정부3: gear value 4: hardness measuring part

10 : 혼합단계 20 : 예열단계10: mixing step 20: preheating step

30 : 성형단계 40 ; 소결단계30: forming step 40; Sintering Step

50 : 열처리단계 60 : 가공단계50: heat treatment step 60: processing step

본 발명은 분말야금을 이용한 기어제조방법에 관한 것으로, 보다 상세하게는 Ni, Cu, Mo, C, Mns, 윤활제가 함유된 금속분말을 일정 온도로 가열하여 금형에 주입한 후 가압장치로 가압성형한 다음 소결과 열처리 및 가공과정을 거쳐 기어를 성형할 수 있도록 한 분말야금을 이용한 기어제조방법에 관한 것이다.The present invention relates to a gear manufacturing method using powder metallurgy. More specifically, Ni, Cu, Mo, C, Mns, a metal powder containing a lubricant is heated to a predetermined temperature and injected into a mold and press-molded by a pressure device Then, the present invention relates to a gear manufacturing method using powder metallurgy which enables the gear to be formed through sintering, heat treatment, and processing.

일반적으로 기계장치나 자동차 등에 적용되어 동력을 전달하는 운동부에 설치되는 기어의 성형방법은 대표적으로 성형소재의 표면에 홉(hob)에 의해 치형각을 형성하는 절삭가공법이 사용되고 있으며, 그외에 밀링 등의 공작기계장치에 의해 가공이 이루어지고 있다.In general, a method of forming a gear installed in a moving part that transmits power applied to a mechanical device or an automobile is typically a cutting method of forming a tooth angle by a hob on a surface of a molding material. Machining is performed by a machine tool device.

종래의 기어 가공은 주로 절삭가공에 의해 치형을 형성하도록 이루어지고 있는바, 절삭공구를 이용하여 가공물을 일일이 가공해야 하는 불편함에도 불구하고 절삭과정에서 금속결정의 변형을 주지 않는다는 점에서 많이 사용되고 있지만 장시간 사용할 경우 홉(hob)의 마모로 인한 리이드각의 오차가 발생하여 양질의 기어를 얻을 수 없으며, 기어의 치형조직이 불량함에 따른 수명이 단축되어 제품의 신뢰성이 떨어지며, 또한 작업시간이 길어 생산성이 떨어지는 문제점이 있었다.Conventional gear machining is mainly used to form teeth by cutting, and although it is inconvenient to process a workpiece by using a cutting tool, it is widely used in that it does not deform metal crystals in the cutting process. When used, the error of lead angle due to the wear of the hob occurs, and it is impossible to obtain a good quality gear.The life of the gear is poor and the life of the gear is shortened. There was a problem falling.

그리고, 기어 제작에 많은 인력과 시간이 소요되고, 제작 과정에서 발생하는 절삭칩으로 인한 재료손실이 크기 때문에 원가상승을 초래하는 문제점 있었다.In addition, it takes a lot of manpower and time to manufacture the gear, there is a problem causing a cost increase because the material loss due to the cutting chip generated in the manufacturing process is large.

또한, 최근에는 자동차 및 기계장치 등의 운동부에 사용되는 기어는 치형에 가해지는 높은 압력 등에 견딜 수 있도록 열처리된 스틸재로 제작하여 사용하고 있다.In recent years, gears used in motor parts such as automobiles and mechanical devices have been manufactured and used as heat treated steel materials to withstand high pressures applied to teeth.

이러한 기존의 기어는 탄성강재를 열간압연하여 인곳트(lgot)를 제조한 후 열간단조 공정을 거쳐 가열한 다음 서서히 공냉시키는 노멀라이징 공정을 거쳐 형 성 하고 이어 침탄공정을 거친 다음 연삭작업을 통하여 제조하게 된다 Such a conventional gear is manufactured by hot rolling an elastic steel to produce an ingot (lgot), heating it through a hot forging process, and then forming it through a normalizing process, which is gradually cooled by air, followed by a carburizing process, and then manufacturing by grinding. do

그러나, 기존의 제조방법은 최종 제품 형성을 위한 별도의 가공 공정을 거치게 되는데, 이 공정이 기어를 제작함에 따른 전체 공정에서 차지하는 비율이 커져서 작업효율이 떨어지고 제작단가가 높아지게 되는 문제점이 있었다.However, the existing manufacturing method is subjected to a separate processing process for forming the final product, the process occupies in the overall process as the gear is made, there is a problem that the work efficiency is lowered and the manufacturing cost is increased.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, Ni, Cu, Mo, C, Mns, 윤활제가 함유된 금속분말을 혼합하여 소정의 온도로 가열된 성형 금형에 투입하여 압축성형한 후 용융점 이하의 열에서 가열 소결함으로써, 2차 가공이 필요 없고, 균일하고 치밀한 조직을 얻을 수 있도록 한 분말야금을 이용한 기어제조방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, Ni, Cu, Mo, C, Mns, mixed with a metal powder containing a lubricant and put into a molding mold heated to a predetermined temperature and compression molding after melting It is an object of the present invention to provide a gear manufacturing method using powder metallurgy in which heat treatment is performed under the following heat so that secondary processing is not necessary and a uniform and dense structure can be obtained.

상기한 목적을 달성하기 위한 본 발명은 스틸재로 이루어진 주원료와 첨가물을 배합하되 Ni:4.00%, Cu:1.50%, Mo:0.51%, C:0.50%, 윤활제(Lubricant):0.80%, MnS:0.50%가 함유된 금속분말을 형성하는 혼합단계와, 상기 금속분말과 금형에 가열온도 120℃에서 20분간 가열하는 예열단계와, 가열된 상기 금속분말을 금형에 투입하여 상기 금형의 가압에 의해 성형품을 제작하는 성형단계와, 상기 성형단계를 거쳐 완성된 성형품에 1130℃의 온도로 열을 가하는 소결단계와, 상기 소결단계를 거친 성형품에 강도를 부여하기 위하여 850℃에서 90분간 열처리하는 열처리단계와, 상기 열처리를 거친 성형품의 표면을 연마하는 가공단계로 이루어진 것을 특징으로 한다.In order to achieve the above object, the present invention is blended with a main raw material and additives made of steel, Ni: 4.00%, Cu: 1.50%, Mo: 0.51%, C: 0.50%, Lubricant: 0.80%, MnS: A mixing step of forming a metal powder containing 0.50%, a preheating step of heating the metal powder and the mold at a heating temperature of 120 ° C. for 20 minutes, and putting the heated metal powder into a mold to form a molded article by pressurizing the mold. And a heat treatment step of applying heat to a molded product completed through the molding step at a temperature of 1130 ° C., and heat treatment at 850 ° C. for 90 minutes to give strength to the molded product that has undergone the sintering step. And, characterized in that consisting of a processing step of polishing the surface of the molded article subjected to the heat treatment.

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이하, 본 발명에 따른 분말야금을 이용한 기어제조방법의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the gear manufacturing method using a powder metallurgy according to the present invention will be described in detail.

도 1은 본 발명에 따른 분말야금을 이용한 기어제조방법의 순서도이고, 도 2는 본 발명에 따른 공정에 의해 생산된 기어를 보인 사시도이다.1 is a flow chart of a gear manufacturing method using a powder metallurgy according to the present invention, Figure 2 is a perspective view showing a gear produced by the process according to the invention.

먼저, 본 발명은 도 2에서 보는 바와 같이 자동차의 드랜스미션에 사용되는 기어(1)로 그 형상은 몸체(2)의 외주면에 기어치(3)가 형성되어 있다.First, the present invention is a gear (1) used in the transmission of the vehicle, as shown in Figure 2, the shape of the gear teeth (3) is formed on the outer peripheral surface of the body (2).

도 1에서와 같이 본 발명의 분말야금을 이용한 기어제조방법은 혼합단계(10)와, 예열단계(20)와, 온간성형단계(30)와, 소결단계(40)와, 열처리단계(50)와, 가공단계(60)에 의해 완성품이 생산되게 된다.Gear manufacturing method using the powder metallurgy of the present invention as shown in Figure 1 is a mixing step 10, preheating step 20, warm forming step 30, sintering step 40, heat treatment step 50 And, the finished product is produced by the processing step 60.

상기 혼합단계(10)는 완제품 생산을 위한 공지의 스틸재로 이루어진 주원료에 첨가물을 첨가하여 배합하여 금속분말을 조성하게 된다.The mixing step 10 is to add the additive to the main raw material made of a known steel material for the production of finished products to form a metal powder.

여기서, 상기 금속분말을 조성하는 첨가물은 Ni:4.00%, Cu:1.50%, Mo:0.51%, C:0.50%, 윤활제(Lubricant):0.80%, Mns:0.50%가 함유된다.Here, the additive for forming the metal powder contains Ni: 4.00%, Cu: 1.50%, Mo: 0.51%, C: 0.50%, Lubricant: 0.80%, Mns: 0.50%.

그리고, 상기 예열단계(20)는 상기 혼합단계를 거쳐 혼합물과 혼합된 금속분말에 소정의 온도로 예열하고, 상기 금속분말이 투입되는 금형에 별도의 가열장치를 구비하여 상기 금속분말에 가해지는 예열과 동일한 열로 금형에 예열을 가하게 된다.In the preheating step 20, the metal powder mixed with the mixture is preheated to a predetermined temperature through the mixing step, and is provided with a separate heating device in the mold into which the metal powder is added. Preheat the mold with the same heat as

여기서, 상기 금속분말과 금형에 가해지는 예열은 120℃±5℃로 열을 가하게 된다.Here, the preheat applied to the metal powder and the mold is heated to 120 ℃ ± 5 ℃.

나아가, 상기 금형에 열을 가함으로써 금형에 투입된 금속분말이 원재료의 항복점을 낮추어 주게 된다.Furthermore, by applying heat to the mold, the metal powder introduced into the mold lowers the yield point of the raw material.

또한, 상기 온간성형단계(30)는 소정의 온도로 예열된 금속분말을 금속분말과 동일한 온도로 예열된 금형에 투입한 후 별도의 가압장치로 가압하여 성형품을 제작하게 된다.In addition, in the warm forming step 30, the metal powder preheated to a predetermined temperature is introduced into a mold preheated to the same temperature as the metal powder, and then pressurized by a separate pressurizing device to produce a molded product.

따라서, 예열된 금형에 투입하여 성형하므로 경도가 340Hv와 인장강도가 850MPafh 향상된 성형품을 얻을 수 있게 된다.Therefore, it is possible to obtain a molded product having an improved hardness of 340 Hv and a tensile strength of 850 MPafh since it is injected into a preheated mold.

그리고, 상기 소결단계(40)는 상기 성형단계에서 성형된 성형품에 일정한 온도를 가열하여 공지의 스틸재로 이루어진 주원료와 혼합물의 입자를 소결화 시키게 된다.Then, the sintering step 40 is to sinter the particles of the main raw material and the mixture made of a known steel material by heating a predetermined temperature in the molded article molded in the molding step.

여기서, 상기 소결온도는 1130℃±5℃로 약 120분간 열을 가하게 된다.Here, the sintering temperature is heated to 1130 ℃ ± 5 ℃ for about 120 minutes.

또한, 상기 열처리단계(50)는 상기 소결처리된 성형품의 표면에 일정한 열을 가하여 내마모성, 회전 등의 마모에 대한 고압하중, 반복굴곡 하중 등에 견딜 수 있는 강도를 갖게 된다.In addition, the heat treatment step 50 has a strength capable of withstanding high pressure load, repeated bending load, and the like for wear resistance, rotation, and the like by applying a constant heat to the surface of the sintered molded article.

여기서, 상기 열처리온도는 850℃±5℃에서 약90±5분간 열처리를 하는 것이 바람직하다.Here, the heat treatment temperature is preferably heat treated for about 90 ± 5 minutes at 850 ℃ ± 5 ℃.

그리고, 상기 가공단계(60)는 열처리된 성형품 표면의 날카로운 모서리부를 연마함과 동시에 제품 표면의 광택 및 경화효과를 얻을 수 있도록 연마석 등을 이용하여 연마하여 도 2와 같이 완성품이 생산되게 된다.In the processing step 60, the finished product is produced as shown in FIG. 2 by grinding using a sharpened stone such that the sharp edges of the surface of the heat-treated molded product can be polished and the gloss and hardening effect of the product surface can be obtained.

이와 같이 주원료에 혼합물인 Ni:4.00%, Cu:1.50%, Mo:0.51%, C:0.50%, 윤활제(Lubricant):0.80%, Mns:0.50%가 첨가되어 혼합된 금속분말을 120℃±5℃로 약 60분 동안 열을 가하여 예열을 시키고, 금형틀에 주입하게 된다.As such, Ni: 4.00%, Cu: 1.50%, Mo: 0.51%, C: 0.50%, Lubricant: 0.80%, and Mns: 0.50% are added to the main raw material, and the mixed metal powder is 120 ℃ ± 5. It is preheated by applying heat for 60 minutes at ℃ and injected into the mold.

이때, 상기 금형은 금속분말에 가열하는 동일한 온도인 120℃±5℃로 열을 가하는 것이 바람직하다.At this time, the mold is preferably heated to 120 ℃ ± 5 ℃, which is the same temperature for heating the metal powder.

이렇게 금형틀에 주입된 금속분말은 금형을 이용하여 성형 프레스에서 단위면적당 3~7ton/㎠의 압력으로 가압하여 기어(1) 형상의 성형이 제작되고, 압축 성형된 제품를 용융점 이하의 온도, 즉 1130℃±2℃에서 약 120분간 열을 가하여 소결한다.The metal powder injected into the mold is pressurized at a pressure of 3 to 7 ton / cm2 per unit area in a molding press using a mold to form a gear (1), and the compression molded product is formed at a temperature below the melting point, that is, 1130. Sintering is carried out by heating at 120 ° C for about 120 minutes.

여기서,제품의 용융점 온도인 1130℃ 이하로 가열하게 되면 입자간 미소결이 발생하여 기계적 특성(강도, 경도, 신율)이 미달되는 등의 문제가 발생하게 되고, 소결온도를 1130℃이상으로 가열하게 되면 기계적 특성이 우수한 제품을 얻을 수 있으나 성능대비 제조비용이 많이 상승하여 효율성이 떨어지고 생산성이 저하됨 즉, 연속로 사용이 불가능하고, 1160℃ 이상에서는 밸트가 녹는 등의 문제점이 발생하게 된다.Here, if the product is heated below the melting point temperature of the product 1130 ℃, microparticles are generated between the particles, the mechanical properties (strength, hardness, elongation), such as a problem occurs, and the sintering temperature is heated to 1130 ℃ or more If the product can be obtained excellent mechanical properties, but the manufacturing cost is increased compared to the performance, the efficiency is lowered, productivity is lowered, that is, it is impossible to use continuously, the problem such as melting the belt at 1160 ℃ or more.

그리고, 소결 공정이 끝난 후에는 제품을 열처리하게 되는데 상기 열처리는 850℃±5℃에서 약90±5분에서 열처리를 하게 된다.Then, after the sintering process is finished the product is heat-treated, the heat treatment is heat-treated at about 90 ± 5 minutes at 850 ℃ ± 5 ℃.

여기서, 열처리온도가 850℃ 이하가 되면 Martensite 조직 형성이 안 되고 경도가 떨어지며 내마모성이 현저하게 떨어지는 등의 문제가 발생하게 된다.Here, when the heat treatment temperature is less than 850 ℃ causes problems such as not forming the martensite structure, the hardness is reduced and the wear resistance is significantly reduced.

이렇게 열처리가 끝난 후에는 제품의 모서리부 및 표면을 연마석을 이용하여 연마하는 과정을 거쳐 완성품인 기어(1)가 제작되게 된다.After the heat treatment is completed, the finished gear 1 is manufactured by grinding the corners and surfaces of the product using abrasive stones.

이때, 상기 제품의 정밀도를 높이기 위하여 정형공정과 제품의 특성상 요구되는 기계적 성질을 얻기 위하여 필요에 따라 용침, 스팀처리, 진공함유, 쇼트, 도금 등의 후처리 공정을 더 할 수도 있다.At this time, in order to obtain the mechanical properties required in the shaping process and the characteristics of the product in order to increase the precision of the product, after treatment, such as infiltration, steam treatment, vacuum containing, shot, plating may be further added.

이와 같이 제작된 본 발명의 완성품은 종래의 방법으로 제작된 제품과 비교해 보면, 동일 성형압으로 성형한 경우 밀도와 성형강도가 상승된다. 또한 소결체의 강도가 증가되게 되며, 경도(Hv) 또한 도 2의 경도측정부(4)를 기준하여 측정한 결과 몸체(2)가 종래의 200Hv에서 340Hv로 향상된 기어를 얻을 수 있게 된다.Compared with the product manufactured by the conventional method, the finished product of the present invention manufactured as described above increases the density and the molding strength when molded at the same molding pressure. In addition, the strength of the sintered body is increased, the hardness (Hv) is also measured on the basis of the hardness measurement unit 4 of Figure 2 as a result of the body 2 can be obtained an improved gear from the conventional 200Hv to 340Hv.

따라서, 본 발명에 따른 제조방법으로 제작된 기어는 별도의 2차공정이 필요 없으며, 균일하고 치밀한 조직을 얻을 수 있게 된다.Therefore, the gear manufactured by the manufacturing method according to the present invention does not need a separate secondary process, and a uniform and dense structure can be obtained.

그러므로, 기어의 제작공정이 1차에서 기어의 완성품이 제작되므로 제작공정이 간단하고, 대량생산이 가능하게 된다. Therefore, since the finished product of the gear is manufactured at the first stage of the gear manufacturing process, the manufacturing process is simple and mass production is possible.

상기에서는 본 발명에 따른 금속야금을 이용한 기어제조방법에 대한 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고, 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고, 이 또한 본 발명의 권리범위에 속한다.In the above, a preferred embodiment of a method for manufacturing a gear using a metal metallurgy according to the present invention has been described, but the present invention is not limited thereto, and the scope of the claims and the detailed description of the invention and the accompanying drawings are various. Modifications can be made and this also falls within the scope of the invention.

상기와 같이 본 발명은 공지의 스틸재로 이루어진 주원료와 혼합물이 혼합된 조성물인 금속분말을 소정의 열을 가하여 가열된 금형에 주입한 후 금형으로 가압하여 소정의 제품형상으로 제작한 다음 소결공정과 열처리공정 및 가공공정을 통하여 기어가 완성됨으로써, 별도의 2차가공을 할 필요가 없게 되어 공정수를 줄일 수 있어 작업효율을 높일 수 있는 효과가 있다.As described above, the present invention injects a metal powder, which is a composition mixed with a main raw material and a mixture of known steel materials, into a heated mold by applying a predetermined heat, and then pressurizes the mold to produce a predetermined product shape, followed by a sintering process and As the gear is completed through the heat treatment process and the machining process, there is no need to perform separate secondary processing, thereby reducing the number of processes, thereby increasing work efficiency.

또한, 공정의 감소로 인하여 가공비를 줄일 수 있으며, 대량생산이 가능한 효과가 있다.In addition, due to the reduction of the process can reduce the processing cost, there is an effect capable of mass production.

Claims (5)

스틸재로 이루어진 주원료와 첨가물을 배합하되 Ni:4.00%, Cu:1.50%, Mo:0.51%, C:0.50%, 윤활제(Lubricant):0.80%, MnS:0.50%가 함유된 금속분말을 형성하는 혼합단계와,The main raw material and additives made of steel are blended to form a metal powder containing Ni: 4.00%, Cu: 1.50%, Mo: 0.51%, C: 0.50%, Lubricant: 0.80%, and MnS: 0.50%. Mixing step, 상기 금속분말과 금형에 가열온도 120℃에서 20분간 가열하는 예열단계와,A preheating step of heating the metal powder and the mold for 20 minutes at a heating temperature of 120 ° C .; 가열된 상기 금속분말을 금형에 투입하여 상기 금형의 가압에 의해 성형품을 제작하는 성형단계와,A molding step of preparing a molded article by pressing the heated metal powder into a mold; 상기 성형단계를 거쳐 완성된 성형품에 1130℃의 온도로 열을 가하는 소결단계와,A sintering step of applying heat at a temperature of 1130 ° C. to the molded product completed through the molding step; 상기 소결단계를 거친 성형품에 강도를 부여하기 위하여 850℃에서 90분간 열처리하는 열처리단계와,A heat treatment step of heat treatment at 850 ° C. for 90 minutes to give strength to the molded article that has undergone the sintering step; 상기 열처리를 거친 성형품의 표면을 연마하는 가공단계로 이루어진 것을 특징으로 하는 분말야금을 이용한 기어제조방법.Gear manufacturing method using a powder metallurgy, characterized in that the processing step of grinding the surface of the molded article subjected to the heat treatment. 삭제delete 삭제delete 삭제delete 삭제delete
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KR101522513B1 (en) * 2015-03-19 2015-05-26 윤석삼 Method for manufacuring a helical gear using powder metallugy
KR101547442B1 (en) 2015-03-19 2015-09-01 윤석삼 Method for manufacuring a helical gear using powder metallugy

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KR101687357B1 (en) * 2015-10-14 2016-12-16 대한소결금속 주식회사 Aluminium powder composition for producing tooth profile and method for producing tooth profile
KR102353579B1 (en) * 2020-08-10 2022-01-21 (주)지케이에스 Powder compacting apparatus for multistage product

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JPS5647550A (en) 1979-09-28 1981-04-30 Riken Corp Iron-based sintered alloy for vane and its manufacture
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KR20050068364A (en) * 2003-12-30 2005-07-05 정행웅 Inner clutch for motorcycle engine parts and it's method for manufacturing

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KR19990084843A (en) * 1998-05-12 1999-12-06 정몽규 Pinion gear manufacturing method using warm forming
KR20050068364A (en) * 2003-12-30 2005-07-05 정행웅 Inner clutch for motorcycle engine parts and it's method for manufacturing

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KR101522513B1 (en) * 2015-03-19 2015-05-26 윤석삼 Method for manufacuring a helical gear using powder metallugy
KR101547442B1 (en) 2015-03-19 2015-09-01 윤석삼 Method for manufacuring a helical gear using powder metallugy

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