KR102478746B1 - 적층 제조된 부품 및 그 제조 방법 - Google Patents
적층 제조된 부품 및 그 제조 방법 Download PDFInfo
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Abstract
Description
도 2a는, 구성의 방향에 수직인 섹션 평면으로, 종래 기술에 따라 SLM을 통해 제조된 Mo 부품의 광학 현미경 사진을 도시한다.
도 2b는, 구성의 방향(구성의 방향은 화살표로 표시됨)인 섹션 평면으로, 종래 기술에 따라 SLM을 통해 제조된 Mo 부품의 광학 현미경 사진을 도시한다.
도 3은 종래 기술에 따라 SLM을 통해 제조된 Mo 부품의 구성의 방향에 평행한 파단 표면의 주사 전자 현미경 사진을 도시한다.
도 4a는, 구성의 방향에 수직인 섹션 평면으로, SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 광학 현미경 사진을 도시한다.
도 4b는, 구성의 방향(구성의 방향은 화살표로 표시됨)인 섹션 평면으로, SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 광학 현미경 사진을 도시한다.
도 5a는 SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 투과 전자 현미경 사진(STEM HAADF)을 도시한다.
도 5b는 SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 투과 전자 현미경 사진(STEM HAADF)을 도시한다 (gb는 결정 입계를 표시한다).
도 5c는, 도 5a에 표시된 측정 지점에서, SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 EELS 스펙트럼을 도시한다.
도 5d는, 도 5b에 표시된 측정 지점에서, SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 EELS 스펙트럼을 도시한다.
도 6은 SLM을 통해 제조된 본 발명 Mo-C 샘플 No.3의 구성의 방향에 평행한 파단 표면의 주사 전자 현미경 사진을 도시한다.
Claims (19)
- 적층 제조 방법을 통해 고-에너지 빔에 의해 함께 융합되어 고체 구조체를 제공하는, 몰리브덴, 적어도 80 at%의 몰리브덴 함량을 갖는 몰리브덴-계 합금, 텅스텐 또는 적어도 80 at%의 텅스텐 함량을 갖는 텅스텐-계 합금의 다수의 개별 분말 입자들을 포함하는 부품으로서,
상기 부품은 0.1 at% 이하의 산소 함량을 갖고, 상기 부품은 0.08 at% 이상의 탄소 함량을 갖는 것을 특징으로 하는 부품. - 제1항에 있어서,
상기 부품은 25 at% 이하의 탄소 함량을 갖는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
탄소 함량(at%)은 산소 함량(at%) 이상인 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
상기 부품은 순수 몰리브덴 또는 순수 텅스텐의 매트릭스 내에 매립된 탄화물을 포함하는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
존재하는 탄소의 총 함량을 기준으로, 25 at% 초과의 몰리브덴 탄화물 또는 텅스텐 탄화물이 존재하는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
구성의 방향에 평행한 파단 평면에서 부품은 파단 면적의 적어도 50%에 걸쳐 결정 입내 파단 특성을 갖는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
구성의 방향에 수직인 파단 평면에서 부품은 파단 면적의 적어도 50%에 걸쳐 결정 입내 파단 특성을 갖는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
상기 부품은 금속간 상(intermetallic phases)을 포함하지 않는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
금속 합금 원소의 총합은 2 at% 이하이며, 이 값은 텅스텐에서 합금 원소로서 몰리브덴 또는 몰리브덴에서 합금 원소로서 텅스텐을 포함하지 않는 것을 특징으로 하는 부품. - 제1항 또는 제2항에 있어서,
구성의 방향에 평행한 평면에서 평균 GAR 값은 5 미만인 것을 특징으로 하는 부품. - 다음 단계들:
- 몰리브덴, 몰리브덴-계 합금, 텅스텐 또는 텅스텐-계 합금의 입자들을 포함하는 출발 분말을 제공하는 단계로서, 상기 입자들은 용융 상을 통해 생성되었고, 상기 분말은 0.15 at% 이상 및 25 at% 이하의 범위로 탄소 함량을 갖는 단계;
- 고-에너지 빔으로 출발 분말의 입자들을 층마다 융합하는 단계
를 갖는, 부품의 제조를 위한 적층 제조 방법. - 제11항에 있어서,
출발 분말을 제공하는 단계는 용융 상에서 침탄 및 구상화를 포함하며, 침탄 단계는 구상화 단계 전, 구상화 단계 동안 또는 구상화 단계 후에 수행되는 것을 특징으로 하는, 부품의 제조를 위한 적층 제조 방법. - 제12항에 있어서,
용융 상에서 구상화는 플라즈마 내에서 C-함유 분위기에서 수행되는 것을 특징으로 하는, 부품의 제조를 위한 적층 제조 방법. - 제11항 내지 제13항 중 어느 한 항에 있어서,
출발 분말을 제공하는 단계는 탄소질 물질이 첨가된 원료 분말의 과립화를 포함하는 것을 특징으로 하는, 부품의 제조를 위한 적층 제조 방법. - 제11항 내지 제13항 중 어느 한 항에 있어서,
층마다 융합하는 단계는 제조될 부품에 열 에너지를 추가로 공급하는 것을 수반하는 것을 특징으로 하는, 부품의 제조를 위한 적층 제조 방법. - 적층 제조 방법을 위해, 몰리브덴, 몰리브덴-계 합금, 텅스텐 또는 텅스텐-계 합금의 입자들을 포함하는 분말을 이용하는 방법으로서, 상기 입자들은 과립화 및/또는 용융 상을 통해 생성되었고, 상기 분말은 0.15 at% 이상 및 25 at% 이하의 범위로 평균 탄소 함량을 갖는, 몰리브덴, 몰리브덴-계 합금, 텅스텐 또는 텅스텐-계 합금의 입자들을 포함하는 분말을 이용하는 방법.
- 제16항에 있어서,
상기 적층 제조 방법은 선택적 레이저 용융, 선택적 전자 빔 용융 또는 레이저 금속 증착인 것을 특징으로 하는, 몰리브덴, 몰리브덴-계 합금, 텅스텐 또는 텅스텐-계 합금의 입자들을 포함하는 분말을 이용하는 방법. - 삭제
- 삭제
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CN114653959B (zh) * | 2022-03-30 | 2023-04-28 | 中南大学 | 一种球形钽粉及其制备和在3d打印中的应用 |
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