KR19980054556A - Manufacturing method of amorphous alloy - Google Patents
Manufacturing method of amorphous alloy Download PDFInfo
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- KR19980054556A KR19980054556A KR1019960073721A KR19960073721A KR19980054556A KR 19980054556 A KR19980054556 A KR 19980054556A KR 1019960073721 A KR1019960073721 A KR 1019960073721A KR 19960073721 A KR19960073721 A KR 19960073721A KR 19980054556 A KR19980054556 A KR 19980054556A
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Abstract
본 발명은 비정질 합금의 제조방법에 관한 것으로서, 더욱 상세하게는 알루미늄-니켈-희토류금속으로 이루어진 비정질 합금에 있어서 희토류 금속을 지르코늄으로 치환하므로써 고온에서도 우수한 물성을 나타낼 수 있으며 상대적으로 저가인 비정질 합금을 제조하는 방법에 관한 것이다.The present invention relates to a method of manufacturing an amorphous alloy, and more particularly, to an amorphous alloy made of an aluminum-nickel-rare earth metal, which can exhibit excellent physical properties even at a high temperature by replacing a rare earth metal with zirconium, And a method for manufacturing the same.
Description
본 발명은 비정질 합금의 제조방법에 관한 것으로서, 더욱 상세하게는 알루미늄-니켈-희토류금속으로 이루어진 비정질 합금에 있어서 희토류 금속을 지르코늄으로 치환하므로써 고온에서도 우수한 물성을 나타낼 수 있으며 상대적으로 저가인 비정질 합금을 제조하는 방법에 관한 것이다.The present invention relates to a method of manufacturing an amorphous alloy, and more particularly, to an amorphous alloy made of an aluminum-nickel-rare earth metal, which can exhibit excellent physical properties even at a high temperature by replacing a rare earth metal with zirconium, And a method for manufacturing the same.
일반적으로 Al85Ni5Ce8Co2과 같은 알루미늄-니켈-희토류금속의 비정질 합금은 희토류금속이 고가일 뿐만 아니라 반응성이 강하다. 이에따라 실용화에 장애가 되는 문제가 있다.In general, amorphous alloys of aluminum-nickel-rare earth metals such as Al 85 Ni 5 Ce 8 Co 2 are not only expensive but also highly reactive. Accordingly, there is a problem that becomes an obstacle to practical use.
본 발명은 상기와 같은 종래 알루미늄-니켈-희토류금속계 비정질 합금에 있어서의 문제점을 해결하기 위하여 희토류금속을 상대적으로 값이 싼 천이금속인 지르코늄으로 치환하여 고온에서의 물성이 우수한 Al88Ni9Zr3비정질 합금을 제조하는 방법을 제공하는 데 그 목적이 있다.In order to solve the problems of the conventional aluminum-nickel-rare earth metal amorphous alloy as described above, the present invention has been made by replacing a rare earth metal with zirconium, which is a transition metal having a relatively low value, to obtain Al 88 Ni 9 Zr 3 And an object of the present invention is to provide a method of manufacturing an amorphous alloy.
도 1은 본 발명에 따른 제조된 비정질 합금의 온도에 따른 인장강도의 변화를 나타낸 그래프이고,FIG. 1 is a graph showing changes in tensile strength according to temperature of the amorphous alloy produced according to the present invention,
도 2는 본 발명에 따라 제조된 비정질 합금의 온도에 따른 연신율의 변화를 나타낸 그래프이다.2 is a graph showing changes in elongation of an amorphous alloy produced according to the present invention with temperature.
본 발명은 Al88Ni9Zr3모합금을 제조한 다음 단롤형 멜트스피너(Single Roller Melt-Spinner)를 이용하여 비정질 리본을 제조한 후 380∼140。K에서 60초 동안 열처리하여 미소결정 분포의 비정질 리본을 제조하는 것을 특징으로 하는 비정질 합금의 제조방법에 그 특징이 있다.The present invention relates to a process for producing an amorphous ribbon using an Al 88 Ni 9 Zr 3 parent alloy by using a single-roll melt spinner and then heat-treating the alloy at 380-140 K for 60 seconds, Characterized in that the amorphous alloy is produced by preparing an amorphous ribbon.
이와같은 본 발명은 더욱 상세하게 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.
본 발명은 지르코늄을 사용한 알루미늄-니켈-희토류금속계 비정질 합금의 제조 방법에 관한 것으로서, 우선 Al88Ni9Zr3모합금을 제조한다. 모합금을 제조는 전부 순수금속(99.9% 이상)을 사용하여 목표조성으로 평량한 후 진공아크용해로를 이용하여 아르곤분위기에서 수행한다.The present invention relates to a method for producing an aluminum-nickel-rare earth metal amorphous alloy using zirconium. First, an Al 88 Ni 9 Zr 3 parent alloy is prepared. The mother alloys are all weighed to the target composition using pure metals (over 99.9%) and then subjected to an argon atmosphere using a vacuum arc furnace.
그 다음 단롤형 용융-스피너를 이용하여 비정질 리본을 제조한다. 이때, 단롤형 멜트스피너를 이용한 제조조건은 챔버 진공도 0. 2 MPa, 압력 7∼9 KPa, 노즐 분사량 50 KPa 및 구리 롤의 교반속도 4,000∼5,000 rpm의 조건으로서 제조하는데, 만일 제조조건을 벗어나는 경우 결정상이 나타난다든가 제조된 리본이 취약하다든가 하는 문제가 발생할 수 있다.The amorphous ribbon is then prepared using a single-roll melt-spinner. At this time, the production conditions using a single-roll melt spinner are prepared under the conditions of a chamber vacuum of 0.2 MPa, a pressure of 7 to 9 KPa, a nozzle injection amount of 50 KPa and a copper roll stirring speed of 4,000 to 5,000 rpm. There may arise a problem that the crystal phase appears or the manufactured ribbon is weak.
이와같이 제조된 비정질 리본은 경도, 인장강도 등과 같은 기계적 성질이 우수하다.The amorphous ribbon thus produced is excellent in mechanical properties such as hardness and tensile strength.
그 다음 상기 리본을 열처리하는 데, 열처리 조건은 380∼480。K에서 60초동안 수행한다. 열처리를 거친 리본은 fcc-알루미늄 입자가 석출되어 석출강화 효과로 인하여 기계적 성질이 보다 향상된다.Next, the ribbon is heat-treated, and the heat treatment is performed at 380 to 480 K for 60 seconds. The fcc-aluminum particles precipitate in the heat-treated ribbon, and the mechanical properties are further improved due to the precipitation strengthening effect.
만일, 열처리 온도와 시간이 상기 범위를 벗어나면 fcc-Al 입자가 적정량 이하 또는 이상으로 석출되어 기계적 성질이 나빠지는 문제가 있고, 열처리 시간이 상기 범위를 벗어나면 이와같이 열처리를 거치면 미소결정으로 분산된 비정질 리본을 제조할 수 있다.If the heat treatment temperature and time are out of the above ranges, there is a problem that fcc-Al particles are precipitated in an amount less than or more than the proper amount and the mechanical properties are deteriorated. If the heat treatment time is out of the above range, An amorphous ribbon can be produced.
이하, 본 발명을 실시예에 의거하여 상세히 설명하면 다음과 같은 바, 본 발명이 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, but it should be understood that the invention is not construed as being limited thereto.
[실시예 1][Example 1]
Al88Ni9Zr3합금의 제조공정Manufacturing process of Al 88 Ni 9 Zr 3 alloy
진공아크로에서 모합금을 제조(Al88Ni9Zr3at%)한 후 단롤형 멜트스피너에서 비정질 리본을 제조하는 바, 제조조건은 챔버진공도 0.2 kpa, 압력 7∼9 KPa, 노즐분사량 50 kpa 및 구리롤의 교반속도 4000∼5000 rpm의 조건으로 하고 420。K, 60초의 조건에서 열처리하여 미소결정으로 분산된 비정질 Al88Ni9Zr3합금을 제조하였다.(Al 88 Ni 9 Zr 3 at%) and then the amorphous ribbon was produced in a single-roll type melt spinner. The manufacturing conditions were a chamber vacuum degree of 0.2 kPa, a pressure of 7 to 9 KPa, a nozzle injection amount of 50 kPa The amorphous Al 88 Ni 9 Zr 3 alloy was prepared by annealing at 420.K for 60 seconds under the conditions of stirring speed of copper rolls of 4000 ~ 5000 rpm.
[비교예 1][Comparative Example 1]
종래 알루미늄-니켈-희토류금속계 비정질합금의 제조공정Manufacturing process of conventional aluminum-nickel-rare earth metal amorphous alloy
진공 아크로에서 모합금을 제조(Al88Ni9Zr3at%)한 후, 단롤형 멕트스피너에서 비정질 리본을 제조한 다음 비정질 Al88Ni9Zr3를 제조하였다.Amorphous Al 88 Ni 9 Zr 3 was prepared by preparing amorphous ribbon in a vacuum arc furnace (Al 88 Ni 9 Zr 3 at%) and then in amorphous ribbon in a single roll type gutt spinner.
[실험예 1][Experimental Example 1]
상기 실시예 및 비교예에 따라 제조된 비정질 합금에 대하여 인장강도, 연신율 및 경도를 측정하여 그 결과를 다음 표 1에 나타내었다.The tensile strength, elongation and hardness of the amorphous alloy prepared according to the above Examples and Comparative Examples were measured, and the results are shown in Table 1 below.
여기서, 인장강도와 연신율을 측정하였고, 인스트론타입(Instron type) 만능 시험기를 이용하여 경도를 마이크로 비커스(Micro vickers) 경도 테스터로 측정하였다.Here, the tensile strength and elongation were measured, and the hardness was measured with a Micro vickers hardness tester using an Instron type universal testing machine.
[표 1][Table 1]
한편, 실시예 1에 따라 제조된 비정질 합금의 온도변화에 따른 인장강도와 신율의 변화를 측정하여 그 결과를 각각 도 1 및 도 2에 나타내었다.Meanwhile, the tensile strength and elongation of the amorphous alloy produced according to Example 1 were measured according to the temperature change, and the results are shown in FIGS. 1 and 2, respectively.
도 1의 결과로부터 본 발명의 합금은 전체적으로 고온에서도 600 MPa 이상의 우수한 인장강도를 나타냄을 알 수 있고, 도 2의 결과로부터 380 K 이상의 온도에서 20% 이상이 뛰어난 연신율을 나타냄을 알 수 있다.From the results shown in FIG. 1, it can be seen that the alloy of the present invention exhibits an excellent tensile strength of 600 MPa or more even at a high temperature as a whole. From the results of FIG. 2, it can be seen that the elongation is excellent by 20% or more at a temperature of 380 K or more.
본 발명에 따라 제조된 비정질 합금은 기계적 성질, 특히 고온에서의 기계적 성질이 우수하고, 지르코늄을 사용하므로써 저가이다.The amorphous alloy produced in accordance with the present invention is excellent in mechanical properties, especially mechanical properties at high temperatures, and is low in cost because of the use of zirconium.
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KR20030087112A (en) * | 2002-05-06 | 2003-11-13 | 현대자동차주식회사 | Aluminum nanocrystal-dispersed amorphous alloy and method for manufacturing the same |
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KR20030087112A (en) * | 2002-05-06 | 2003-11-13 | 현대자동차주식회사 | Aluminum nanocrystal-dispersed amorphous alloy and method for manufacturing the same |
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