KR100228049B1 - Vibration absorption cast iron of high damping capacity - Google Patents

Vibration absorption cast iron of high damping capacity Download PDF

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KR100228049B1
KR100228049B1 KR1019970000297A KR19970000297A KR100228049B1 KR 100228049 B1 KR100228049 B1 KR 100228049B1 KR 1019970000297 A KR1019970000297 A KR 1019970000297A KR 19970000297 A KR19970000297 A KR 19970000297A KR 100228049 B1 KR100228049 B1 KR 100228049B1
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cast iron
vibration
graphite
vibration damping
present
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KR19980065364A (en
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백승환
손용철
김정철
한동운
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이성범
주식회사우진
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/04—Cast-iron alloys containing spheroidal graphite

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  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

본 발명은 FC 20 정도의 강도를 유지하면서 우수한 감쇠능을 갖는 주철에 관한 것으로, 중량

Figure kpo00001
로 C:3.4-4.0
Figure kpo00002
, Si:1.5-2.5
Figure kpo00003
, Mn:0.4-0.8
Figure kpo00004
, 나머지 Fe로 이루어진 주철에 Cu:0.2-0.4
Figure kpo00005
, Ni:0.1-0.9
Figure kpo00006
가 첨가되고, 탄소당량이 4.3-4.5
Figure kpo00007
인 것을 특징으로 하는 고감쇠능 방진주철이다.The present invention relates to cast iron having excellent damping ability while maintaining strength of about FC 20.
Figure kpo00001
C: 3.4-4.0
Figure kpo00002
, Si: 1.5-2.5
Figure kpo00003
, Mn: 0.4-0.8
Figure kpo00004
, Cu: 0.2-0.4
Figure kpo00005
Ni: 0.1-0.9
Figure kpo00006
Is added, the carbon equivalent is 4.3-4.5
Figure kpo00007
It is a high damping dust-proof cast iron, characterized in that.

이와같이 이루어진 고감쇠능 방진주철은 종래 주철재와 비슷한 정도의 강도를 유지하면서도 진동감쇠 효과가 우수하여 진동이 문제시되는 각종 기계부품 또는 각종 정밀기계에 사용이 가능하다.The high damping anti-vibration cast iron made in this way is excellent in vibration damping effect while maintaining the strength similar to that of conventional cast iron, and thus can be used in various mechanical parts or various precision machines where vibration is a problem.

Description

고감쇠능 방진주철High Damping Dustproof Cast Iron

본 발명은 FC 20 정도의 강도를 유지하면서 우수한 감쇠능을 갖는 주철에 관한 것이다.The present invention relates to cast iron having excellent damping ability while maintaining strength of about FC 20.

현대사회에 들어서서 산업화가 진행됨에 따라 자원개발과 기술력 향상으로 인한 생태계 파괴, 걷잡을 수 없는 지구 온난화, 인구집중과 도시화가 됨으로써 옛날 농경 사회에서는 문제되지 않았던 소음 및 진동문제가 사회문제로 대두되고 있으며, 일상 생활에 큰 지장을 주고 있는 등 환경적 문제가 발생하게 되었다.As industrialization progresses in the modern society, the destruction of ecosystems due to resource development and technological advancement, uncontrollable global warming, population concentration and urbanization are causing problems of noise and vibration that were not a problem in the agricultural society in the past. Environmental problems have arisen, such as severely affecting daily life.

이러한 소음·진동 문제는 인간에게 심리적 불안감과 난청 등의 질병을 유발시키며, 공업적 측면에서는 정밀기계의 정밀도 저하 및 부품의 조기피로파괴 등의 성능 저하를 야기시킨다.These noise and vibration problems cause psychological anxiety and diseases such as hearing loss in humans, and in industrial terms, they cause performance deterioration such as deterioration of precision of precision machinery and early fatigue destruction of parts.

이러한 소음과 진동을 방지하기 위해서 종래에는 진동체에 오일댐퍼나 에어댐퍼를 설치하여 진동에너지를 흡수시키거나, 금속과 금속 사이에 점탄성이 큰 고분자 재료를 끼워서 진동에너지를 흡수시키는 방법등이 강구되어 왔었다.In order to prevent such noise and vibration, conventionally, an oil damper or an air damper is installed on the vibrating body to absorb vibration energy, or a method of absorbing vibration energy by inserting a high-viscoelastic polymer material between the metal and the metal is devised. Came.

이러한 구조적 방법에 의해서는 진동과 소음을 제거하는 데 있어서 많은 문제점들이 내포되어 있을 뿐만 아니라, 공업적 이용면에서도 그 한계성을 벗어날 수가 없다.This structural method not only imposes many problems in removing vibration and noise, but also overcomes its limitations in terms of industrial use.

따라서 최근에 와서는 금속재료 그 자체가 진동에너지를 직접 흡수케 하는 적극적인 방식(material damping)의 방진대책이 고려되어 제진재료의 개발에 관한 연구가 활발히 진행되고 있다.Therefore, in recent years, studies on the development of vibration damping materials have been actively conducted in consideration of the anti-vibration measures of the material damping method in which the metal material itself absorbs vibration energy directly.

이러한 제진재료중 가장 일찍이 널리 사용되고 있는 것이 주철(cast iron)이다.One of the earliest widely used vibration damping materials is cast iron.

종래에 주철에 관한 연구는 구상흑연주철, CV 주철, 오스템퍼드 구상흑연주철 등 대부분 강도 향상 측면으로만 연구되어 탄소강에 필적할 수준까지 개발되었으나 감쇠능 향상과 관련된 연구는 전무한 실정이다.In the past, most studies on cast iron have been conducted in terms of strength enhancement, such as nodular cast iron, CV cast iron, and Osstemford nodular cast iron, but have been developed to a level comparable to carbon steel.

편상흑연주철은 구상흑연주철에 비하여 경도 및 인장강도가 작으나 주조성, 열전도도 및 진동감쇠능이 우수하여 반복 진동을 받는 자동차 부품이나 공작기계 등의 부품에 많이 이용되고 있으나, 기계적 성질의 향상과 아울러 보다 높은 진동감쇠능을 갖는 주철의 개발이 시급히 요구되고 있다.Although flake graphite cast iron has lower hardness and tensile strength than spheroidal graphite cast iron, it is widely used in parts such as automobile parts and machine tools which are subjected to repeated vibration because of its excellent castability, thermal conductivity, and vibration damping ability. There is an urgent need for the development of cast iron with higher vibration damping capabilities.

편상흑연주철이 구상흑연주철 보다 진동감쇠능이 우수한 것은 흑연의 연속성이 크기 때문이며, 이에 비하여 구상흑연주철은 흑연이 불연속적으로 존재하여 진동감쇠능이 낮다.The reason why flake graphite cast iron has better vibration damping ability than spheroidal graphite cast iron is because of the continuity of graphite, whereas the graphite graphite cast iron has low vibration damping ability due to discontinuous graphite.

또한, 편상흑연주철은 흑연의 면적율이 크고 흑연편이 A형일 경우가 가장 진동감쇠능이 우수하다는 결과만 보고되고 있을 뿐, 흑연의 연속성과 진동감쇠능과의 정량적인 상관관계 및 진동감쇠기능에 대해서는 아직 보고된 바 없는 실정이다.In addition, it is reported that flake graphite cast iron has the best vibration damping ability when the area ratio of graphite is large and the graphite piece is A type, and the quantitative correlation between the continuity of graphite and the vibration damping ability and the vibration damping function are yet to be reported. It has not been reported.

주철의 감쇠능을 향상시키기 위해서는 일반적으로 탄소당량(C.E=C wt

Figure kpo00010
+1/3 Si wt
Figure kpo00011
) 값을 높여 정출흑연량을 증가시키나, 이는 강도의 급격한 저하를 초래하기 때문에 많은 문제점을 가지고 있다.In order to improve the damping ability of cast iron, carbon equivalent (CE = C wt)
Figure kpo00010
+1/3 Si wt
Figure kpo00011
Increasing the value of) increases the amount of crystallized graphite, but this has many problems because it causes a sharp drop in strength.

이러한 것은 사용환경이 복잡한 방진재료로서는 매우 불리하게 작용하기 때문에 기존의 주철에 비해 보다 높은 진동감쇠능을 가짐과 동시에 강도가 우수한 방진주철의 개발이 시대적으로 요구되고 있다.Since this is very disadvantageous as a dustproof material having a complicated use environment, it is required in the age to develop a dustproof cast iron having higher vibration damping ability and superior strength than conventional cast iron.

따라서 본 발명주철은 탄소당량이 크게 됨에도 불구하고 종래재에 필적하는 강도를 갖고, 더불어 우수한 진동감쇠능을 가지므로 광범위하게 진동이 문제시되는 회전체의 받침대 및 각종 기기를 대체하는 데 그 목적이 있다.Therefore, the cast iron of the present invention has a strength comparable to that of the conventional materials in spite of a large carbon equivalent, and also has excellent vibration damping ability. .

제1도는 주철에 있어서의 감쇠능과 탄소당량(C.E)과의 관계.1 is a relationship between the damping ability of the cast iron and the carbon equivalent (C.E).

제2도는 합금원소에 따른 공정온도의 변화.2 is a change of the process temperature according to the alloying elements.

제3도는 3.9

Figure kpo00009
C 주철에서 Cu, Ni 첨가에 따른 흑연의 연속성과 진동감쇠능의 변화.3 is 3.9
Figure kpo00009
Changes in Continuity and Vibration Attenuation of Graphite with Cu and Ni Addition in C Cast Iron.

제4도는 제3도를 증명하기 위한 광학현미경 조직사진.FIG. 4 is an optical microscope histogram for demonstrating FIG. 3. FIG.

제5도는 종래 주철과 본 발명에 따른 주철의 자유진동곡선.5 is a free vibration curve of cast iron according to the present invention and conventional cast iron.

제6도는 Cu와 Mo 첨가에 따른 pearlite와 bainite 기지를 보여주는 광학현미경 조직사진이다.FIG. 6 is an optical micrograph showing the pearlite and bainite matrix according to Cu and Mo addition.

상기 목적을 달성하기 위하여 본 발명은 중량

Figure kpo00012
로 C:3.4-4.0
Figure kpo00013
, Si 1.5-2.5
Figure kpo00014
, Mn:0.4-0.8
Figure kpo00015
, 나머지 Fe로 이루어진 주철에 Cu:0.2-0.4
Figure kpo00016
, Ni:0.1-0.9
Figure kpo00017
가 첨가되고, 탄소당량이 4.3-4.5
Figure kpo00018
인 것을 특징으로 하는 고감쇠능 방진주철을 제공한다.The present invention to achieve the above object is by weight
Figure kpo00012
C: 3.4-4.0
Figure kpo00013
, Si 1.5-2.5
Figure kpo00014
, Mn: 0.4-0.8
Figure kpo00015
, Cu: 0.2-0.4
Figure kpo00016
Ni: 0.1-0.9
Figure kpo00017
Is added, the carbon equivalent is 4.3-4.5
Figure kpo00018
It provides a high damping anti-vibration cast iron characterized in that.

이하, 본 발명을 보다 상세하게 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail.

본 발명은 탄소당량이 4.3-4.5

Figure kpo00019
, 중량
Figure kpo00020
로 C:3.4-4.0
Figure kpo00021
, Si 1.5-2.5
Figure kpo00022
, Mn:0.4-0.8
Figure kpo00023
, P:0.004-0.1
Figure kpo00024
, S:0.04-0.1
Figure kpo00025
를 기본으로 하여 여기에 Cu:0.2-0.4
Figure kpo00026
, Ni:0.1-0.9
Figure kpo00027
가 첨가된 고감쇠능 방진주철에 대하여 설명한다.In the present invention, the carbon equivalent is 4.3-4.5
Figure kpo00019
, weight
Figure kpo00020
C: 3.4-4.0
Figure kpo00021
, Si 1.5-2.5
Figure kpo00022
, Mn: 0.4-0.8
Figure kpo00023
, P: 0.004-0.1
Figure kpo00024
, S: 0.04-0.1
Figure kpo00025
Based on Cu: 0.2-0.4
Figure kpo00026
Ni: 0.1-0.9
Figure kpo00027
The high damping anti-vibration cast iron added with is described.

이와 같은 본 발명에 따른 주철을 제조함에 있어서는, 먼저 고탄소 선철과 순철을 상기와 같은 조성비율에 맞게 준비하고 용선로 또는 전기로 등의 용해로에서 로 온도를 1,500

Figure kpo00028
이상으로 하여 녹인 다음, 여기에 Cu, Ni 등의 첨가원소를 첨가 후 1,400
Figure kpo00029
이상의 온도에서 출탕하여 잉곳트(Ingot)를 만든다.In manufacturing the cast iron according to the present invention, first, high-carbon pig iron and pure iron are prepared in accordance with the composition ratio as described above, and the furnace temperature is 1,500 in a melting furnace or an electric furnace.
Figure kpo00028
After dissolving as above, add 1,400 after adding additional elements such as Cu and Ni.
Figure kpo00029
Ingot is made by tapping at the above temperature.

본 발명에서 주철의 진동감쇠능의 주요인이 되는 정출흑연의 양에 큰 영향을 미치는 C를 3.4-4.0

Figure kpo00030
, Si를 1.5-2.5
Figure kpo00031
로 함과 동시에 탄소당량을 4.3-4.5
Figure kpo00032
로 한 것은 탄소당량이 4.3
Figure kpo00033
이하가 되면 강도는 우수하지만 높은 감쇠능은 얻을 수 없으며, 4.5
Figure kpo00034
이상이 되면 거칠고 커다란 흑연이 과잉 정출되어 강도의 저하가 급격하기 때문이다.In the present invention, C having a great influence on the amount of crystallized graphite, which is the main factor of vibration damping ability of cast iron, is 3.4-4.0
Figure kpo00030
Si 1.5-2.5
Figure kpo00031
And the carbon equivalent is 4.3-4.5
Figure kpo00032
The carbon equivalent is 4.3
Figure kpo00033
If it is below, the strength is excellent but high damping ability is not obtained, 4.5
Figure kpo00034
This is because when it is abnormal, coarse and large graphite is excessively crystallized and the drop in strength is sudden.

본 발명에서 편상흑연을 크게 성장시키는 원소인 Si를 1.5-2.5wt

Figure kpo00035
로 한정하였은데, 이는 1.5wt
Figure kpo00036
이하로는 우수한 감쇠능을 나타내기에 충분한 편상흑연의 크기를 얻을 수 없고, 2.5wt
Figure kpo00037
이상에서는 페라이트(ferrite)가 생성되어 강도 및 진동감쇠능이 저하하기 때문이다.1.5-2.5wt% Si which is an element which greatly increases flake graphite in the present invention
Figure kpo00035
Limited to 1.5wt
Figure kpo00036
Below, it is impossible to obtain a size of flake graphite sufficient to exhibit excellent damping ability, and it is 2.5wt
Figure kpo00037
This is because ferrite is produced and strength and vibration damping ability are deteriorated.

본 발명에서 Mn, P, S 등의 원소는 통상 주철의 함유량으로 설정한 것이다.In the present invention, elements such as Mn, P, and S are usually set to the content of cast iron.

본 발명에서 Cu와 Ni는 흑연화 촉진원소이고, 퍼얼라이트(pearlite) 안정화원소이다.In the present invention, Cu and Ni are graphitization promoting elements and pearlite stabilizing elements.

Cu와 Ni의 첨가량을 한정한 이유는 표 1의 실시예에서 볼 수 있듯이 Cu:0.2-0.4, Ni:0.1-0.9

Figure kpo00039
범위에서 인장강도가 FC 20 수준을 유지함과 동시에 SDC=25
Figure kpo00040
이상의 높은 진동감쇠능을 얻을 수 있기 때문이다.The reason for limiting the addition amount of Cu and Ni is Cu: 0.2-0.4 as can be seen in the examples of Table 1 Ni: 0.1-0.9
Figure kpo00039
SDC = 25 while maintaining tensile strength at FC 20 in the range
Figure kpo00040
This is because the above high vibration damping ability can be obtained.

본 발명에서 출탕 온도를 1,400

Figure kpo00041
이상으로 한 것은 주철재료의 가장 취약점인 질량 효과를 줄이기 위하여 고온출탕을 하였다.In the present invention, the tapping temperature is 1,400
Figure kpo00041
The above was hot tapping to reduce the mass effect, which is the weakest of cast iron materials.

이와 같이 이루어진 발명예는 표 1에 나타난 바와 같이, 종래예 및 비교예보다 인장강도 및 진동감쇠 효과가 우수한 것으로 나타나고 있다.As shown in Table 1, the invention made as described above is superior in tensile strength and vibration damping effect than the conventional and comparative examples.

또한, 제1도는 감쇠능을 좌우하는 탄소당량과 진동감쇠능의 관계를 나타낸 것으로서 그림에서 보듯이 탄소당량이 4.3 이상에서 급격히 감쇠능이 증가함을 볼 수 있다.In addition, Figure 1 shows the relationship between the carbon equivalent and vibration damping capacity that influences the damping capacity, and as shown in the figure, it can be seen that the damping capacity rapidly increases when the carbon equivalent is higher than 4.3.

제2도는 합금원소에 따른 공정온도의 변화를 나타낸 것으로 Cu, Ni를 첨가하면 공정온도간의 간격을 넓혀 칠(chill; 백선화) 발생을 억제시킴으로써 건전한 A형 흑연을 생성시킬 수 있다.FIG. 2 shows the change in process temperature according to alloying elements. When Cu and Ni are added, healthy A-type graphite can be produced by widening the interval between process temperatures and suppressing the occurrence of chill.

제3도는 3.9

Figure kpo00042
C 주철에서 함금원소 첨가에 따른 흑연의 연속성과 진동감쇠능의 변화를 나타낸 그림이다.3 is 3.9
Figure kpo00042
The graph shows the change of continuity and vibration damping capacity of graphite with the addition of alloying elements in cast iron.

흑연의 연속성이 큰 합금이 진동감쇠능도 우수한 것을 볼 수 있다. 즉, 본 방진주철의 진동감쇠능은 흑연의 연속성이 클수록 우수한 값을 보이고 있다.It can be seen that the alloy having high continuity of graphite also has excellent vibration damping ability. That is, the vibration damping ability of the present dustproof cast iron shows an excellent value as the continuity of graphite increases.

흑연의 연속성은 흑연편의 길이와 흑연편의 면적율로 생각할 수 있는데, 즉, 이 두가지 요인이 모두 큰 것이 진동감쇠능이 크다.The continuity of the graphite can be thought of as the length of the graphite piece and the area ratio of the graphite piece. That is, the larger the two factors, the greater the vibration damping ability.

제4도는 제3도를 증명하기 위해서 광학현미경으로 조직관찰을 한 것으로서, 발명주철이 종래주철보다 흑연편의 길이가 월등하게 길기 때문에 흑연의 연속성이 커져서 진동감쇠능이 크게 향상되었다.FIG. 4 is a structure observation by optical microscope to verify FIG. 3. As the invention cast iron has a much longer length of graphite than conventional cast iron, the continuity of graphite is increased, and vibration damping ability is greatly improved.

제5도는 종래주철(FC 15, FC 25)과 발명주철의 자유진동곡선으로서 발명주철이 종래주철보다 진동곡선의 감쇠속도가 월등하게 빠른 것을 나타내고 있다.5 shows free vibration curves of conventional cast irons (FC 15 and FC 25) and invented cast iron, which shows that the invention cast iron has a much faster attenuation rate of the vibration curve than conventional cast iron.

Figure kpo00043
Figure kpo00043

본 발명의 제2구성인 중량

Figure kpo00044
로서, C:3.4~4.0
Figure kpo00045
, Si:1.5~2.5
Figure kpo00046
, Mn:0.4~0.8
Figure kpo00047
, P:0.04~0.1
Figure kpo00048
, S:0.04~0.1
Figure kpo00049
를 기본으로 하여 여기에 Cu:0.3~0.5
Figure kpo00050
, Mo:0.5~1.2
Figure kpo00051
를 동시에 첨가하고, 탄소당량이 4.3-4.5이며, 퍼얼라이트(pearlite) 기지 조직을 갖는 고강도 및 고감쇠능 주철에 대하여 설명한다.Weight which is 2nd structure of this invention
Figure kpo00044
As C: 3.4 ~ 4.0
Figure kpo00045
, Si: 1.5-2.5
Figure kpo00046
, Mn: 0.4-0.8
Figure kpo00047
, P: 0.04-0.1
Figure kpo00048
, S: 0.04 ~ 0.1
Figure kpo00049
Based on Cu: 0.3 ~ 0.5
Figure kpo00050
, Mo: 0.5-1.2
Figure kpo00051
Are simultaneously added, and the high-strength and high-damping cast iron having a carbon equivalent of 4.3-4.5 and a pearlite matrix is described.

본 발명에서 Cu와 Mo는 모두 퍼얼라이트 안정화원소로서 단독첨가 보다는 동시 첨가가 퍼얼라이트 형성 촉진과 미세화 효과에 상승작용을 하므로 동시에 첨가를 하였다.In the present invention, both Cu and Mo were added simultaneously because the simultaneous addition synergistically promotes the formation and refinement of the pearlite rather than a single addition as a pearlite stabilizing element.

즉, Cu를 단독 첨가했을 경우는 Cu의 흑연화 효과로 감쇠능의 저하는 작지만 강도의 유지에는 영향을 주지 못하고, Mo를 단독 첨가시에는 퍼얼라이트 미세화 효과는 기대되나 퍼얼라이트 생성량이 적어 그 효과는 반감된다.In other words, when Cu is added alone, the decrease in damping ability is small due to the graphitization effect of Cu, but it does not affect the maintenance of strength. When Mo is added alone, the finer effect of perlite is expected, but the amount of perlite production is small. Is halved.

따라서 퍼얼라이트 생성 촉진 및 미세화 효과를 모두 얻기 위해서는 Cu와 Mo를 동시에 첨가하여야 한다.Therefore, Cu and Mo must be added at the same time to obtain both the promotion of the production of pearlite and the miniaturization effect.

본 발명에서 첨가원소의 양은 Cu:0.3~0.5

Figure kpo00052
, Mo:0.5~1.2
Figure kpo00053
로 한정하였다.The amount of added element in the present invention is Cu: 0.3 ~ 0.5
Figure kpo00052
, Mo: 0.5-1.2
Figure kpo00053
It was limited to.

일반적으로 Cu와 Mo를 동시에 첨가하였을 경우, 퍼얼라이트를 얻기 위해서는 Cu:0.5

Figure kpo00054
이하, Mo:1.2
Figure kpo00055
이하로 첨가하여야 하고, Cu 0.3
Figure kpo00056
이하, Mo 0.5
Figure kpo00057
이하일 경우에는 실시예의 표 2에 나타난 바와 같이 인장강도의 향상에 미치는 영향이 매우 적다.In general, when Cu and Mo are added at the same time, in order to obtain a pearlite, Cu: 0.5
Figure kpo00054
Mo: 1.2 or less
Figure kpo00055
Should be added below, Cu 0.3
Figure kpo00056
Mo 0.5 or less
Figure kpo00057
In the following case, as shown in Table 2 of the embodiment, the effect on the improvement of the tensile strength is very small.

본 발명에서 기지조직을 퍼얼라이트로 한 것은 일반적으로 이력형에 속하는 제진재료의 감쇠기구는 복합형, 강자성형, 전위형 및 쌍정형이 있는데, 이중 복합형 방진합금은 강하고 인성이 많은 기지에 연한 제2상이 있는 경우, 기지와 제2상과의 계면에서 소성유동 또는 점성유동이 생기기 쉽게 되어 외부의 진동에너지가 이들의 유동에 소비되기 때문에 진동감쇠가 발생한다고 알려져 있다.In the present invention, the base structure is made of pearlite, and the damping mechanism of the vibration damping material belonging to the hysteresis type generally includes a compound type, a ferromagnetic type, a dislocation type, and a twin type. When the second phase is present, it is known that plastic flow or viscous flow tends to occur at the interface between the base and the second phase, and vibration attenuation occurs because external vibration energy is consumed in their flow.

따라서 Cu 0.5

Figure kpo00058
이상, Mo 1.2
Figure kpo00059
이상을 첨가한 주철은 제6도에 나타난 바와 같이 베이나이트(bainite) 기지가 생성되어 퍼얼라이트 기지에 비해 강하여 인장강도가 증가하였으나, 인성이 부족하므로 제2상(정출흑연)과의 계면에서 소성 또는 점성 유동이 생기기 어려워 진동에너지의 소비가 적어져 진동감쇠능은 크게 저하하였다.Thus Cu 0.5
Figure kpo00058
Or more, Mo 1.2
Figure kpo00059
As shown in FIG. 6, the cast iron added above was formed with bainite matrix, which was stronger than the pearlite matrix, resulting in increased tensile strength. Alternatively, the viscous flow hardly occurs, and thus the consumption of vibration energy is reduced, so that the vibration damping ability is greatly reduced.

따라서 진동 감쇠능이 가장 우수한 완전 퍼얼라이트 기지 조직으로 한정하였다.Therefore, it was limited to the complete pearlite matrix having the best vibration damping ability.

Figure kpo00060
Figure kpo00060

본 발명의 제3구성이 중량

Figure kpo00061
로서, C:3.4~4.0
Figure kpo00062
, Si:1.5~2.5
Figure kpo00063
, Mn:0.4~0.8
Figure kpo00064
, P:0.04~0.1
Figure kpo00065
, S:0.04~0.1
Figure kpo00066
를 기본으로 하여 여기에 Cr:0.5-1.5
Figure kpo00067
, Cu:0.5~3.0
Figure kpo00068
를 동시에 첨가하고, 탄소당량이 4.3-4.5인 고강도 및 진동감쇠능 방진합금에 대하여 설명한다.3rd constitution of the present invention
Figure kpo00061
As C: 3.4 ~ 4.0
Figure kpo00062
, Si: 1.5-2.5
Figure kpo00063
, Mn: 0.4-0.8
Figure kpo00064
, P: 0.04-0.1
Figure kpo00065
, S: 0.04 ~ 0.1
Figure kpo00066
Based on Cr: 0.5-1.5
Figure kpo00067
, Cu: 0.5 ~ 3.0
Figure kpo00068
Are added simultaneously, and a high strength and vibration damping anti-vibration alloy having a carbon equivalent of 4.3-4.5 is described.

본 발명에서 Cr은 퍼얼라이트 안정화 원소이고, Cu는 퍼얼라이트 미세화원소이기 때문에 Cr을 단독첨가하여 얻어지는 특성에 대한 경제성을 고려하여 Cu를 복합 첨가하여 기계적 특성을 높였다.In the present invention, since Cr is a pearlite stabilizing element and Cu is a pearlite microelement, in view of the economics of the properties obtained by adding Cr alone, Cu is added in combination to increase mechanical properties.

Cu첨가량이 0.5

Figure kpo00069
이하에서는 퍼얼라이트 미세화 효과가 미약하고, 3.0
Figure kpo00070
이상에서는 실시예의 표 3에서와 같이 진동감쇠능을 크게 떨어뜨리기 때문에 0.5-3.0
Figure kpo00071
로 한정하였다.Cu addition amount 0.5
Figure kpo00069
In the following, the pearlite refinement effect is weak, 3.0
Figure kpo00070
In the above, since the vibration damping ability is greatly reduced as shown in Table 3 of the embodiment, 0.5-3.0.
Figure kpo00071
It was limited to.

이 경우 Cr 첨가량은 인장강도를 증가시키기 위해 0.5

Figure kpo00072
이상 첨가하여야 하고, 또한 시멘타이트(cementite)의 다량 석출을 방지하기 위하여 1.5
Figure kpo00073
이하로 한정할 필요가 있다.In this case, the amount of Cr added is 0.5 to increase the tensile strength.
Figure kpo00072
Must be added in addition to the above, and in order to prevent the large precipitation of cementite, 1.5
Figure kpo00073
It is necessary to limit to the following.

이와같이 이루어진 본 발명은 표 3에 나타난 바와 같이, 종래예보다 인장강도가 우수하면서도 진동감쇠 효과가 큰 것으로 나타나고 있다.As shown in Table 3, the present invention made as described above has been shown to have a greater vibration damping effect while having superior tensile strength than the conventional example.

Figure kpo00074
Figure kpo00074

이와 같이 이루어진 본 발명은 종래 주철재와 비슷한 정도의 강도를 유지하면서도 진동감쇠 효과가 우수하여 진동이 문제시되는 각종 기계부품 또는 각종 정밀기계에 사용이 가능하다.The present invention made as described above can be used in a variety of mechanical parts or various precision machines having a vibration problem is excellent while maintaining the strength similar to the conventional cast iron.

Claims (1)

중량
Figure kpo00075
로 C:3.4-4.0
Figure kpo00076
, Si:1.5-2.5
Figure kpo00077
, Mn:0.4-0.8
Figure kpo00078
, 나머지 Fe로 이루어진 주철에 Cu:0.2-0.4
Figure kpo00079
, Ni:0.1-0.9
Figure kpo00080
가 첨가되고, 탄소당량이 4.3-4.5
Figure kpo00081
인 것을 특징으로 하는 고감쇠능 방진주철.weight
Figure kpo00075
C: 3.4-4.0
Figure kpo00076
, Si: 1.5-2.5
Figure kpo00077
, Mn: 0.4-0.8
Figure kpo00078
, Cu: 0.2-0.4
Figure kpo00079
Ni: 0.1-0.9
Figure kpo00080
Is added, the carbon equivalent is 4.3-4.5
Figure kpo00081
High damping dust-proof cast iron, characterized in that.
KR1019970000297A 1997-01-08 1997-01-08 Vibration absorption cast iron of high damping capacity KR100228049B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05255730A (en) * 1992-03-13 1993-10-05 Toyota Central Res & Dev Lab Inc Production of gray cast iron having high vibration damping capacity
JPH06116676A (en) * 1992-10-02 1994-04-26 Kiriyuu Kikai Kk Production of high damping capacity cast iron

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05255730A (en) * 1992-03-13 1993-10-05 Toyota Central Res & Dev Lab Inc Production of gray cast iron having high vibration damping capacity
JPH06116676A (en) * 1992-10-02 1994-04-26 Kiriyuu Kikai Kk Production of high damping capacity cast iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240001921A (en) 2022-06-28 2024-01-04 신학수 Air gun nozzle tip for removing impurities from tap hole

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