KR101295322B1 - Method for manufacturing piston ring - Google Patents

Method for manufacturing piston ring Download PDF

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KR101295322B1
KR101295322B1 KR1020130041799A KR20130041799A KR101295322B1 KR 101295322 B1 KR101295322 B1 KR 101295322B1 KR 1020130041799 A KR1020130041799 A KR 1020130041799A KR 20130041799 A KR20130041799 A KR 20130041799A KR 101295322 B1 KR101295322 B1 KR 101295322B1
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South Korea
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piston ring
manufacturing
ring
raw material
rod
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KR1020130041799A
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Korean (ko)
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정광주
정문재
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정광주
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

PURPOSE: A piston ring manufacturing method and a piston ring manufactured by the same are provided to manufacture the piston ring of excellent features without impurities by focusing the impurities included in a raw material to the center of a raw-material rod. CONSTITUTION: A piston ring manufacturing method includes the following steps of: manufacturing a solid base alloy (1), in which all raw materials are mixed, by injecting the molten raw materials into a mold of a predetermined shape and cooling the same; manufacturing the molten base alloy by melting the base alloy; manufacturing a raw-material rod (2) of a rod shape by injecting the molten base alloy into a mold of a rod shape and cooling the same; manufacturing a round bar having a cross section of a ring shape by cutting the center of the raw-material rod; and manufacturing a piston ring (10) of a ring shape by cutting the round bar at a constant dimension. [Reference numerals] (AA) Raw material; (BB) Melting; (CC,DD) Furnace; (EE) Molten base alloy; (FF) Impurities; (GG,HH) Cooling; (II) Rod mold

Description

피스톤 링 제조 방법 및 이 방법에 의해 제조된 피스톤 링{METHOD FOR MANUFACTURING PISTON RING}The piston ring manufacturing method and the piston ring manufactured by this method {METHOD FOR MANUFACTURING PISTON RING}

본 발명은 피스톤 링에 관한 것으로, 더욱 상세하게는 피스톤 링의 제조 과정에서 불순물을 제거하여 양질의 피스톤 링을 제조할 수 있는 피스톤 링 제조 방법 및 이 방법에 의해 제조된 피스톤 링에 관한 것이다.
The present invention relates to a piston ring, and more particularly, to a piston ring manufacturing method and a piston ring manufactured by the method that can remove the impurities in the manufacturing process of the piston ring to produce a high quality piston ring.

예를 들어 다이캐스팅 장치에는 유체의 원료를 공급하기 위한 피스톤이 사용되고, 내연기관의 엔진에는 동력발생을 위한 피스톤이 사용된다.For example, a piston for supplying a raw material of a fluid is used for a die casting device, and a piston for generating power is used for an engine of an internal combustion engine.

피스톤은 실린더 내부에서 직선왕복 운동하여 기능을 수행하는 것이며, 실린더와의 마찰을 최소화하고 기밀(또는 수밀)을 위하여 피스톤 링이 적용된다.The piston is a linear reciprocating motion inside the cylinder to perform the function, the piston ring is applied to minimize the friction with the cylinder (or watertight).

피스톤 링은 피스톤의 둘레부에 끼워질 수 있도록 링(ring)형태로 구성되며 강도와 경도 등에 따라 다양한 소재가 사용된다.Piston ring is composed of a ring (ring) so that it can be fitted to the circumference of the piston and various materials are used depending on the strength and hardness.

종래 기술에 의한 피스톤 링 제조 방법은, 철 등 소재의 용해액을 원료로 하며 원심주조에 의해 링형으로 제조하는 공정을 포함한다.The piston ring manufacturing method according to the prior art includes a step of producing a ring shape by centrifugal casting, using a solution of a material such as iron as a raw material.

이와 같은 종래 기술에 따르면, 원심 주조시 원료에 포함된 불순물이 그대로 포함되기 때문에 피스톤 링의 성질(강도, 경도 등)이 약한 문제점이 있다.According to the conventional technology, since the impurities contained in the raw material are included as they are during centrifugal casting, there is a problem in that the properties (strength, hardness, etc.) of the piston ring are weak.

물론, 이론적이지만 피스톤 링의 원료를 불순물이 없는 원료로 사용한다면 원심주조에 의해서도 양질의 피스톤 링을 제조할 수 있겠지만, 현실적으로 불순물이 없는 순수한 원료를 공급하는 것이 어렵고, 제조 공정 중에서도 불순물이 포함될 수 있기 때문에 양질의 피스톤 링을 제조하기 위한 현실적인 기술이 요구되고 있다.
Of course, theoretically, if the raw material of the piston ring is used as an impurity-free material, it is possible to produce a good quality piston ring by centrifugal casting. Therefore, a realistic technique for producing a good quality piston ring is required.

공개특허 제10-2001-0066864호Patent Publication No. 10-2001-0066864 공개실용신안 제20-1998-0061284호Public utility model No. 20-1998-0061284 공개특허 제10-2010-0039042호Patent Publication No. 10-2010-0039042

본 발명은 전술한 바와 같은 문제점을 해결하기 위한 것으로, 피스톤 링의 제조 과정에서 불순물을 제거하여 불순물에 의한 피스톤 링의 성질 변경을 방지할 수 있는 피스톤 링 제조 방법 및 이 방법에 의해 제조된 피스톤 링을 제공하려는데 그 목적이 있다.
The present invention is to solve the problems as described above, the piston ring manufacturing method and piston ring manufactured by the method that can remove the impurities in the manufacturing process of the piston ring to prevent the change of the properties of the piston ring by the impurities The purpose is to provide.

본 발명에 의한 피스톤 링 제조 방법은, 각각 고체 상태의 철(Fe), 탄소(C), 규소(Si), 페로망간(Fe-Mn), 페로크롬(Fe-Cr), 페로몰리브덴(Fe-Mo), 페로텅스텐(Fe-W), 코발트(Co)를 원료로 준비하는 제1단계와; 상기 제1단계를 통해 준비한 고체의 원료를 용해한 후 일정 형상의 틀에 주입 및 냉각하여 모든 원료들이 혼합된 고체의 모합금을 제조하는 제2단계와; 상기 제2단계를 통해 제조한 고체의 모합금을 용해하여 모합금 용탕을 제조하는 제3단계와; 상기 제3단계를 통해 제조한 모합금 용탕을 봉 형상의 틀에 주입 및 냉각하여 봉 형상의 원료 봉을 제조하는 제4단계와; 상기 제4단계를 통해 제조한 원료 봉의 중심을 절삭하여 링 형상 단면의 환봉을 제조하는 제5단계와; 상기 제5단계를 통해 제조한 환봉을 일정 치수로 커팅하여 피스톤 링을 제조하는 제6단계를 포함하여 이루어지며, 상기 원료 봉 제조 공정에서 상기 원료 봉의 둘레부를 냉각하여 둘레부에서부터 중심으로 가면서 온도가 낮아지도록 함으로써 불순물이 원료 봉의 중심쪽에 집중되고, 이 원료 봉의 중심을 절삭하여 환봉을 제조함으로써 불순물이 없는 피스톤 링을 제조하는 것을 특징으로 한다.
The method for producing a piston ring according to the present invention includes iron (Fe), carbon (C), silicon (Si), ferromanganese (Fe-Mn), ferrochrome (Fe-Cr), and ferromolybdenum (Fe-) in solid state, respectively. Mo), ferro tungsten (Fe-W), Cobalt (Co) to prepare a first step as a raw material; Dissolving the raw material of the solid prepared in the first step and injecting and cooling the mold into a predetermined shape to produce a mother alloy of all the raw materials mixed therein; A third step of preparing a master alloy melt by dissolving the master alloy of the solid prepared in the second step; A fourth step of preparing a rod-shaped raw material rod by injecting and cooling the mother alloy melt prepared in the third step into a rod-shaped mold; A fifth step of manufacturing a round bar having a ring-shaped cross section by cutting the center of the raw material rod manufactured through the fourth step; And a sixth step of manufacturing a piston ring by cutting the round bar manufactured by the fifth step to a predetermined dimension. In the raw material rod manufacturing process, a temperature is increased while cooling the periphery of the raw material rod from the periphery to the center. By lowering the impurities, the impurities are concentrated on the center of the raw material rod, and the center ring of the raw material rod is cut to produce a round rod, thereby producing a piston ring free of impurities.

본 발명에 의한 피스톤 링 제조 방법 및 이 방법에 의해 제조된 피스톤 링에 의하면, 철 등의 용액상태 원료를 이용하여 피스톤 링을 제조하며, 이 제조 과정에서 원료에 포함된 불순물이 피스톤 링에 포함되지 않는 부분(원료 봉의 중심)으로 집중되도록 하여 피스톤 링이 성형되는 부분에는 순수한 원료만 있고 불순물이 없으므로 우수한 특성(강도, 경도 등)의 피스톤 링을 제조할 수 있고, 결과적으로 피스톤 링이 적용되는 장비의 내구성과 신뢰성을 향상할 수 있다.
According to the piston ring manufacturing method according to the present invention and the piston ring manufactured by the method, the piston ring is manufactured by using a solution state raw material such as iron, and impurities contained in the raw material are not included in the piston ring during this manufacturing process. It is possible to manufacture piston rings with excellent characteristics (strength, hardness, etc.) because only the pure raw material is present in the part where the piston ring is molded and there are no impurities in the part where the piston ring is formed by concentrating to the part (center of the raw material rod). Its durability and reliability can be improved.

도 1은 본 발명에 의한 피스톤 링 제조 방법의 공정도.1 is a process chart of the piston ring manufacturing method according to the present invention.

도 1에서 보이는 바와 같이, 본 발명에 따른 피스톤 링 제조 방법은 다음과 같다.As shown in Figure 1, the piston ring manufacturing method according to the present invention is as follows.

1. 원료 준비. 1. Raw material preparation.

먼저 본 발명에서 사용되는 원료는 철(Fe), 탄소(C), 규소(Si), 페로망간(Fe-Mn), 페로크롬(Fe-Cr), 페로몰리브덴(Fe-Mo), 페로텅스텐(Fe-W), 코발트(Co)이며, 철은 피스톤 링의 주원료이며 나머지 원료[탄소(C), 규소(Si), 페로망간(Fe-Mn), 페로크롬(Fe-Cr), 페로몰리브덴(Fe-Mo), 페로텅스텐(Fe-W), 코발트(Co)]는 피스톤 링의 강도와 경도를 높이거나 불순물을 제거하는 목적으로 사용된다.First, the raw materials used in the present invention are iron (Fe), carbon (C), silicon (Si), ferro manganese (Fe-Mn), ferrochrome (Fe-Cr), ferro molybdenum (Fe-Mo), ferro tungsten ( Fe-W), cobalt (Co), iron is the main raw material of the piston ring and the remaining raw materials (carbon (C), silicon (Si), ferro-manganese (Fe-Mn), ferrochrome (Fe-Cr), ferromolybdenum ( Fe-Mo), ferro tungsten (Fe-W), and cobalt (Co)] are used to increase the strength and hardness of the piston ring or to remove impurities.

상기 원료에서 페로망간(Fe-Mn), 페로크롬(Fe-Cr), 페로몰리브덴(Fe-Mo), 페로텅스텐(Fe-W) 등의 합금은 망간, 크롬, 몰리브덴, 텅스텐을 각각 공급하기 위한 것이며, 순수 원료를 사용하지 않음으로써 제조가 쉬워질 수도 있다(예를 들어 합금을 통해 원료들의 녹는점을 유사하게 맞출 수 있음). Alloys such as ferro manganese (Fe-Mn), ferrochrome (Fe-Cr), ferro molybdenum (Fe-Mo), ferro tungsten (Fe-W) in the raw material for supplying manganese, chromium, molybdenum, tungsten, respectively It may be easy to manufacture by not using pure raw materials (for example, the melting point of raw materials can be similarly matched through alloys).

상기 페로망간(Fe-Mn)은 망간 70~80중량%, 페로크롬(Fe-Cr)은 크롬 60~70중량%, 페로몰리브덴(Fe-Mo)은 몰리브덴 80~85중량%, 페로텅스텐(Fe-W)은 텅스텐 65~75중량%일 수 있다. 여기서 기재하지 않은 비율은 합금 분야에서 널리 사용되는 것이며, 또한, 전술한 혼합비율로 한정되는 것은 아니다. The ferro manganese (Fe-Mn) is 70 to 80% by weight of manganese, ferrochrome (Fe-Cr) is 60 to 70% by weight of chromium, ferro molybdenum (Fe-Mo) is 80 to 85% by weight of molybdenum, ferro tungsten (Fe -W) may be 65 to 75% by weight of tungsten. The ratio which is not described here is used widely in the field of alloys, and is not limited to the above-mentioned mixing ratio.

이와 같은 원료는 철 70.12~74.0중량%, 탄소 0.15~0.25중량%, 규소 0.1~0.4중량%, 페로망간 0.3~0.8중량%, 페로크롬(Fe-Cr) 5.0~13.0중량%, 페로몰리브덴(Fe-Mo) 1.0~3.5중량%, 페로텅스텐(Fe-W) 3.0~8.0중량%, 코발트(Co) 8.0~12.0중량%의 비율로 사용된다.Such raw materials are 70.12-74.0 wt% iron, 0.15-0.25 wt% carbon, 0.1-0.4 wt% silicon, 0.3-0.8 wt% ferromanganese, 5.0-13.0 wt% ferrochrome (Fe-Cr), ferromolybdenum (Fe -Mo) 1.0 to 3.5% by weight, ferro tungsten (Fe-W) 3.0 to 8.0% by weight, cobalt (Co) is used in a ratio of 8.0 to 12.0% by weight.

상기 원료는 원산지 내지 제조공장에서 고체 상태로 제조되어 공급된다.The raw material is manufactured and supplied in a solid state at the place of origin to the manufacturing plant.

2. 모합금 제조.2. Master alloy manufacturing.

고체 상태의 원료들을 각각 용해(각각의 녹는점 이상의 온도이며 공지된 것이므로 구체적인 수치로 한정하지 않는다)한 후 이 원료 용해액을 일정 형상의 성형틀(예컨대 육면체 형상의 틀)에 주입한 후 냉각(상온이 될 때까지 냉각)하여 고체의 모합금(1)을 제조한다. 모합금(1)의 성형틀이 육면체인 것을 예로 들었으며 따라서 모합금(1)은 육면체형이다.After dissolving the raw materials in solid state (the temperature of each melting point is well known and not limited to specific values), the raw material dissolving solution is poured into a mold of a certain shape (for example, a cube shape) and then cooled ( Cool to room temperature) to prepare a solid master alloy (1). The mold of the master alloy 1 is hexahedral and thus the master alloy 1 is hexahedral.

모합금(1)은 모든 원료들이 혼합된 고체이다.
The master alloy 1 is a solid in which all the raw materials are mixed.

3. 모합금 용해.3. Master Alloy Melting.

모합금(1)은 원료 봉(2)(피스톤 링의 외형과 동일한 형태의 원통형)을 만들기 위한 전 공정의 생산물이며, 고체의 모합금(1)을 원료 봉(2)으로 만들기 위하여 모합금(1)을 용해(예를 들어 1500℃~1650℃이며 모합금의 녹는점 이상의 온도에서 1시간 20분 내지 2시간동안 용해)한다. The master alloy 1 is a product of the entire process for making the raw material rod 2 (cylindrical in the same shape as the piston ring), and in order to make the solid master alloy 1 into the raw material rod 2, 1) is dissolved (e.g., dissolved for 1 hour 20 minutes to 2 hours at a temperature of 1500 ° C to 1650 ° C and above the melting point of the master alloy).

고체 원료를 모합금 제조 공정없이 바로 용해하여 사용할 수도 있지만, 원료들의 균일한 혼합을 위하여 모합금 제조 - 모합금 용해의 공정을 거치는 것이 바람직하다.Although the solid raw material may be directly dissolved without using the master alloy manufacturing process, it is preferable to go through the process of preparing the master alloy-dissolving the master alloy for uniform mixing of the raw materials.

4. 원료 봉 제조.4. Raw rod manufacturing.

모합금(1)을 용해한 모합금 용탕을 원형 봉의 형틀에 주입하여 냉각(상온이 될 때까지)함으로써 원료 봉(2)을 제조한다. The raw material rod 2 is manufactured by inject | pouring the mother alloy melt which melt | dissolved the master alloy 1 in the mold of a round rod, and cooling (until it becomes normal temperature).

원료 봉(2)은 중앙이 뚫리지 않은 원통이며, 피스톤 링의 외경에 따라 크기가 달라진다.The raw material rod 2 is a cylinder with no central hole, and its size varies depending on the outer diameter of the piston ring.

모합금 용탕의 냉각은 모합금 용탕의 외부에서부터 이루어지며, 이 과정에서 모합금 용탕에 분산되어 있는 불순물이 모합금 용탕의 중심쪽으로 모이게 된다. 즉, 원료 봉(2)의 둘레부에는 불순물이 없는 상태이다(냉각 과정에서 비금속의 불순물 예컨대 H2O, O2, 기포, 비금속게재물 등은 액상물질과 함께 중심쪽으로 이동함).
Cooling of the molten master alloy is performed from the outside of the molten alloy, and in this process, impurities dispersed in the molten alloy are collected toward the center of the molten alloy. That is, there is no impurity in the periphery of the raw material rod 2 (non-metal impurities such as H 2 O, O 2, bubbles, non-metallic inclusions, etc. move toward the center along with the liquid material in the cooling process).

5. 환봉 제조.5. Round Bar Manufacturing.

냉각을 통해 제조된 원료 봉(2)은 피스톤 링의 단면이 아니라 중앙이 막힌 단면이며, 피스톤 링의 제조를 위하여 원료 봉(2)의 중심을 절삭 제거한다. 절삭을 통해 환형으로 형성되고 피스톤 링의 내경과 연관있는 것이므로 피스톤 링의 내경에 따라 절삭크기가 달라진다.The raw material rod 2 produced by cooling is not a cross section of the piston ring but a cross section of which the center is blocked, and the center of the raw material rod 2 is cut off to manufacture the piston ring. The cutting size is formed in an annular shape and is related to the inner diameter of the piston ring, so that the cutting size depends on the inner diameter of the piston ring.

이로써 환봉(3)이 제조되며, 원료 봉(2)의 중심에서 제거된 슬러지는 불순물이 포함된 상태이다.Thereby, the round bar 3 is manufactured, and the sludge removed from the center of the raw material bar 2 is a state containing impurities.

원료 봉(2)의 절삭을 통해서 환봉(3)을 제조하는 것은 형상의 제조일 뿐이며, 최종 생산품인 피스톤 링의 강도 보강을 위하여 환봉(3)을 제조한 후 열처리를 할 수 있다. 열처리는 진공 열처리로서 1200℃~1300℃의 온도로 6시간 30분 내지 7시간 30분, 바람직하게 1250℃의 온도로 7시간 동안 이루어지며, 상기 온도와 시간은 최적의 강도 보강을 위한 조건이며 상기 범위를 벗어나면 강도 보강이 약하거나 파괴가 일어날 수 있다.The manufacturing of the round bar 3 through the cutting of the raw material rod 2 is only a manufacture of the shape, and after the round bar 3 is manufactured to reinforce the strength of the piston ring, which is a final product, the round bar 3 may be heat treated. The heat treatment is a vacuum heat treatment for 6 hours 30 minutes to 7 hours 30 minutes at a temperature of 1200 ℃ to 1300 ℃, preferably for 7 hours at a temperature of 1250 ℃, the temperature and time is a condition for optimal strength reinforcement Outside the range, the strength reinforcement may be weak or breakage may occur.

6. 피스톤 링 커팅.6. Cutting piston ring.

환봉(3)을 피스톤 링의 두께로 커팅한 후 일부분의 절단을 통해 통상의 피스톤 링과 동일한 고리 형태인 다수개의 피스톤 링(10)을 제조한다.The round bar 3 is cut to the thickness of the piston ring, and then a portion of the round bar 3 is cut to produce a plurality of piston rings 10 having the same ring shape as a conventional piston ring.

커팅된 피스톤 링(10)을 그대로 제품으로 사용될 수 있고, 또는 표면을 연마할 수 있다.The cut piston ring 10 may be used as a product as it is, or the surface may be polished.

<실시예><Examples>

1. 원료.1. Raw material.

철(Fe) 70.1중량%, 탄소(C) 0.25중량%, 규소(Si) 0.4중량%, 페로망간(Mn) 0.8중량%, 페로크롬(Cr) 8.0중량%, 페로몰리브덴(Mo) 3.0중량%, 페로텅스텐(W) 6.45중량%, 코발트(Co) 11.0중량%이다.Iron (Fe) 70.1 wt%, Carbon (C) 0.25 wt%, Silicon (Si) 0.4 wt%, Ferromanganese (Mn) 0.8 wt%, Ferrochrome (Cr) 8.0 wt%, Ferromolybdenum (Mo) 3.0 wt% , Ferro tungsten (W) is 6.45% by weight, cobalt (Co) 11.0% by weight.

2. 제조.2. Manufacture.

상기 고체 원료를 용해하여 모합금 성형틀에 주입 및 냉각하여 고체의 모합금을 제조 - 모합금을 용해하여 모합금 용탕 제조 - 모합금 용탕을 봉 형틀에 주입 및 냉각하여 봉 형상의 원료 봉 제조 - 원료 봉의 중심을 절삭하여 링 형상 단면의 환봉 제조 - 환봉을 커팅하여 피스톤 링 제조(두께 2.5mm, 내경 Ø56.40, 외경 Ø61.40).Dissolving the solid raw material and injecting and cooling into a master alloy mold to produce a solid master alloy-Dissolve the master alloy to produce a master alloy molten metal-Inject and cool the master alloy melt into a rod mold to manufacture a rod-shaped raw material rod- Manufacture of round bar with ring-shaped cross section by cutting center of raw material rod-Manufacture of piston ring by cutting round bar (thickness 2.5mm, inner diameter Ø56.40, outer diameter Ø61.40).

3. 테스트.3. Testing.

공지의 경도 측정기를 이용하여 경도를 측정하였으며, HRC값이 48~50을 나타내었다. 종래 사용되고 있는 피스톤 링은 HRC값이 40~45 정도이며 본 발명에 의한 피스톤 링은 종래 피스톤 링보다 경도가 큰 것으로 확인되었다.
Hardness was measured using a known hardness tester, and the HRC value was 48 to 50. The piston ring used in the prior art has an HRC value of about 40 to 45, and the piston ring according to the present invention was confirmed to have a greater hardness than the conventional piston ring.

1 : 모합금, 2 : 원료 봉
3 : 환봉, 10 : 피스톤 링1: master alloy, 2: raw material rod
3: round bar, 10: piston ring

Claims (4)

각각 고체 상태의 철(Fe) 70.12~74.0중량%, 탄소(C) 0.15~0.25중량%, 규소(Si) 0.1~0.4중량%, 페로망간(Fe-Mn) 0.3~0.8중량%, 페로크롬(Fe-Cr) 5.0~13.0중량%, 페로몰리브덴(Fe-Mo) 1.0~3.5중량%, 페로텅스텐(Fe-W) 3.0~8.0중량%, 코발트(Co) 8.0~12.0중량%를 원료로 준비하는 제1단계와;
상기 제1단계를 통해 준비한 고체의 원료를 용해한 후 일정 형상의 틀에 주입 및 냉각하여 모든 원료들이 혼합된 고체의 모합금을 제조하는 제2단계와;
상기 제2단계를 통해 제조한 고체의 모합금을 용해하여 모합금 용탕을 제조하는 제3단계와;
상기 제3단계를 통해 제조한 모합금 용탕을 봉 형상의 틀에 주입 및 냉각하여 봉 형상의 원료 봉을 제조하는 제4단계와;
상기 제4단계를 통해 제조한 원료 봉의 중심을 절삭하여 링 형상 단면의 환봉을 제조하는 제5단계와;
상기 제5단계를 통해 제조한 환봉을 일정 치수로 커팅하여 링(ring) 형태의 피스톤 링을 제조하는 제6단계를 포함하고,
상기 제1단계에서 상기 페로망간(Fe-Mn)은 망간 70~80중량%, 페로크롬(Fe-Cr)은 크롬 60~70중량%, 페로몰리브덴(Fe-Mo)은 몰리브덴 80~85중량%, 페로텅스텐(Fe-W)은 텅스텐 65~75중량%인 것을 특징으로 하는 피스톤 링 제조 방법.70.12-74.0 wt% of iron (Fe) in solid state, 0.15-0.25 wt% of carbon (C), 0.1-0.4 wt% of silicon (Si), 0.3-0.8 wt% of ferro-manganese (Fe-Mn), and ferrochrome ( Fe-Cr) 5.0-13.0 wt%, ferro molybdenum (Fe-Mo) 1.0-3.5 wt%, ferro tungsten (Fe-W) 3.0-8.0 wt%, cobalt (Co) 8.0-12.0 wt% A first step;
Dissolving the raw material of the solid prepared in the first step and injecting and cooling the mold into a predetermined shape to produce a mother alloy of all the raw materials mixed therein;
A third step of preparing a master alloy melt by dissolving the master alloy of the solid prepared in the second step;
A fourth step of preparing a rod-shaped raw material rod by injecting and cooling the mother alloy melt prepared in the third step into a rod-shaped mold;
A fifth step of manufacturing a round bar having a ring-shaped cross section by cutting the center of the raw material rod manufactured through the fourth step;
And a sixth step of manufacturing a piston ring having a ring shape by cutting the round bar manufactured through the fifth step to a predetermined dimension.
In the first step, the ferro manganese (Fe-Mn) is 70 to 80% by weight of manganese, ferrochrome (Fe-Cr) is 60 to 70% by weight of chromium, ferro molybdenum (Fe-Mo) is 80 to 85% by weight of molybdenum , Ferro tungsten (Fe-W) is a piston ring manufacturing method, characterized in that 65 to 75% by weight of tungsten. 청구항 1에 있어서, 상기 제5단계를 통해 제조한 환봉을 1200℃~1300℃의 온도로 6시간 30분 내지 7시간 30분 동안 열처리하여 조직을 치밀하게 하는 단계가 더 포함되는 것을 특징으로 하는 피스톤 링 제조 방법.
The method of claim 1, further comprising the step of heat-treating the round bar manufactured through the fifth step at a temperature of 1200 ℃ ~ 1300 ℃ for 6 hours 30 minutes to 7 hours 30 minutes to further compact the tissue Ring manufacturing method.
삭제delete 청구항 1 또는 청구항 2에 의해 링(ring) 형태로 제조되어 피스톤의 둘레부에 설치되어 사용되는 것을 특징으로 하는 피스톤 링.Piston ring, characterized in that it is manufactured in the form of a ring (ring) according to claim 1 or 2 installed on the circumference of the piston.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101677169B1 (en) 2016-03-09 2016-11-17 삼영기계 (주) piston ring improved abrasion-proof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0559495A (en) * 1991-08-30 1993-03-09 Kobe Steel Ltd Piston ring material
JPH0631544A (en) * 1992-07-17 1994-02-08 Mitsui Eng & Shipbuild Co Ltd Manufacture of piston ring
JP2684263B2 (en) * 1991-08-09 1997-12-03 三井造船株式会社 Manufacturing method of piston ring
KR20040077101A (en) * 2003-02-28 2004-09-04 이일규 Special steel as material for machining steel and manufacturing process thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2684263B2 (en) * 1991-08-09 1997-12-03 三井造船株式会社 Manufacturing method of piston ring
JPH0559495A (en) * 1991-08-30 1993-03-09 Kobe Steel Ltd Piston ring material
JPH0631544A (en) * 1992-07-17 1994-02-08 Mitsui Eng & Shipbuild Co Ltd Manufacture of piston ring
KR20040077101A (en) * 2003-02-28 2004-09-04 이일규 Special steel as material for machining steel and manufacturing process thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101677169B1 (en) 2016-03-09 2016-11-17 삼영기계 (주) piston ring improved abrasion-proof

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