KR101999912B1 - Max 상으로부터 부품을 제조하는 방법 - Google Patents

Max 상으로부터 부품을 제조하는 방법 Download PDF

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KR101999912B1
KR101999912B1 KR1020177030716A KR20177030716A KR101999912B1 KR 101999912 B1 KR101999912 B1 KR 101999912B1 KR 1020177030716 A KR1020177030716 A KR 1020177030716A KR 20177030716 A KR20177030716 A KR 20177030716A KR 101999912 B1 KR101999912 B1 KR 101999912B1
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티모 데프카
렌테리아 아르투로 플로레스
브릿타 라욱스
미햐엘 옷트
제바스티안 피게르트
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지멘스 악티엔게젤샤프트
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Abstract

최초로, 추가식 제조 방법의 사용에 의해 MAX 상으로부터 부품이 제조될 수 있다.

Description

MAX 상으로부터 부품을 제조하는 방법
본 발명은 부가식 제조 공정에 의한 MAX 상(MAX phase)으로부터의 제조 방법에 관한 것이다.
MAX 상은 그 특성에 기초하여 금속과 세라믹 사이에서 분류되는 화학량론적 상이다. 한편(금속)으로 MAX 상은 양호한 열 전도성 및 높은 내열충격성을 나타내며, 다른 한편(세라믹)으로 그들은 뛰어난 강성(stiffness), 내식성, 높은 내마모성 및 낮은 밀도를 나타낸다. 또한, 1473K-1573K에서도, 소정 MAX 상은 여전히 상당한 내크리프성(creep resistance) 및 내피로성을 나타낸다.
이들 특성은 MAX 상을 가스 터빈에서와 같은 고온 용례를 위한 관심대상으로 만든다. 따라서, 블레이드 첨단(blade tip)은 MAX 상으로 재조절 및 보호될 수 있다. 그러나, 낮은 밀도 및 고온 저항성 또한 MAX 상이 블레이드를 위한 재료로서 사용되기에 적합해 보이도록 한다.
기존의 제조 경로:
1. 열간 등방 가압에 의한 분말형 기초 성분(전이 금속 + 그룹 A의 원소 + 탄소/질소)의 합성 → 그 후 가공물이 기계가공에 의해 고형체로부터 제조됨 → 크기 및 형태를 한정함.
2. 정확한 화학량론적 조성물의, 1.에 따라 제조된 분말로부터의 3단계 공정: 성형체(green body)(MAX 상 + 바인더)의 3D 인쇄 + 냉간 등방 가압 + 소결 → 분말을 생성하기 위한 더 복잡한 제조 경로 + 최종 형상을 보장하기 위한 복잡한 3단계 기술.
MAX 상의 부품으로의 형성 및 제조는 복잡하고 어렵다.
따라서, 본 발명의 목적은 전술한 문제를 해결하기 위한 것이다.
상기 목적은 청구항 1에 청구된 바와 같은 방법에 의해 달성된다.
추가의 유리한 수단들이 종속 청구항에 기재되어 있으며 추가의 장점을 달성하기 위해서 원하는 방식으로 서로 조합될 수 있다.
선택적 레이저 용융(SLM)에 의해 MAX 상을 유사 그물 형상 또는 그물 형상으로 제조하는 것이 제안된다.
이는 2개의 경로에 의해 실행될 수 있다:
1) MAX 상의 개별 성분의 혼합 분말에 의해, 또는
2) MAX 상의 정확한 화학량론을 갖는 분말에 의해.
SLM 공정에 의한 제조 공정을 위한 공정 데이터는 MAX 상, 구체적으로는 Ti3SiC2 및 Cr2AlC에 대해서는 다음과 같다:
분말의 입자 크기는 가스-분무법(gas-atomized) 또는 분쇄에 의해 10㎛ - 60㎛이다.
이하가 가능한 공정 창(process window)으로서 제안된다:
주사 속도: 400 - 2000mm/s, 바람직하게는 1000 - 1500mm/s
출력(power output): 80 - 250W, 바람직하게는 100 - 170W
스폿(spot) 크기: 30 - 300㎛
특히, 레이저가 에너지 빔으로서 사용된다.
차폐 가스하에서의 합금의 가공에 의해 매트릭스에서의 산소 성분이 낮아진다.

Claims (4)

  1. MAX 상으로부터, 부품을 제조하는 방법이며,
    부가식 제조 공정이 사용되고,
    분말이 층층이 도포 및 치밀화되고,
    분말의 입자 크기는 10㎛ 내지 60㎛이고,
    레이저 또는 전자 빔의 에너지 빔과 분말을 갖는 기판 사이의 주사 속도는 400mm/s와 2000mm/s 사이이고,
    출력은 80W와 250W 사이이며,
    에너지 빔의 스폿 크기는 30㎛와 300㎛ 사이인, 방법.
  2. 제1항에 있어서,
    분말은 가스 분무법에 의해 제조되는, 방법.
  3. 제1항에 있어서,
    분말은 분쇄 공정에 의해 제조되는 방법.
  4. 제1항 내지 제3항 중 어느 한 항에 있어서,
    상기 방법은 차폐 가스 분위기에서 실행되는, 방법.
KR1020177030716A 2015-03-31 2016-03-21 Max 상으로부터 부품을 제조하는 방법 KR101999912B1 (ko)

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DE102015205787.9A DE102015205787A1 (de) 2015-03-31 2015-03-31 Verfahren zur Herstellung eines Bauteils aus MAX-Phasen
DE102015205787.9 2015-03-31
PCT/EP2016/056100 WO2016156082A1 (de) 2015-03-31 2016-03-21 Verfahren zur herstellung eines bauteils aus max-phasen

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EP3689610A1 (en) * 2019-01-30 2020-08-05 Siemens Aktiengesellschaft Max phase powder with a braze material and method
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US12005504B2 (en) 2020-08-24 2024-06-11 Kennametal Inc. Method for fabricating a three-dimensional metal part using a conformable fugitive material
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