KR102222885B1 - 철계 합금분말, 이를 이용한 성형품 - Google Patents
철계 합금분말, 이를 이용한 성형품 Download PDFInfo
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Abstract
상기 철계 비정질 합금분말은 철, 크롬, 몰리브데늄을 포함하는 합금용 조성물로서, 상기 철 100 중량부에 대해서, 상기 크롬 함량은 25.4 내지 55.3 중량부 및 상기 몰리브데늄 함량은 35.6 내지 84.2 중량부로 포함하고 탄소와 붕소에서 선택된 적어도 1종 이상을 더 포함한다.
Description
도 2는 비교예에 따른 철계 합금분말의 XRD 그래프로서, (a)~(c)는 비교예 1, 5, 7의 철계 합금분말에 대한 그래프이다.
도 3은 본 발명의 실시예 7에 따른 철계 비정질 합금분말(a)과 그 단면(b), 그리고 비교예 7에 따른 철계 합금분말(c) 및 그 단면(d)을 SEM 분석한 사진이다.
도 4는 본 발명에 따른 코팅물 시편의 XRD 그래프로서, (a)~(e)는 각각 실시예 1, 3, 6, 7, 8의 철계 비정질 합금분말을 적용한 코팅물 실시예 9, 11, 14, 15, 16 시편의 XRD 그래프이다.
도 5는 비교예의 코팅물 시편 XRD 그래프로서, (a)~(c)는 각각 비교예 1, 5, 7의 철계 합금분말을 적용한 코팅물 비교예 8, 12, 14 시편의 XRD 그래프이다.
도 6은 본 발명에 따른 철계 비정질 합금분말을 이용한 용사 코팅물과 비교예의 합금분말을 이용한 용사 코팅물의 표면 이미지로서, (a)~(c)는 각각 실시예 1, 7, 8의 비정질 합금분말을 이용한 용사 코팅물의 표면 이미지이고, (d)~(g)는 각각 비교예 1, 3, 5, 7의 합금분말을 이용한 용사 코팅물의 표면 이미지이다.
도 7은 본 발명에 따른 실시예 1, 3, 6, 8의 철계 비정질 합금분말을 이용한 용사 코팅물 시편의 단면을 광학 현미경으로 관찰한 이미지(배율 200배)로서, (a)~(d)는 각각 실시예 9, 11, 14, 16 시편의 단면을 관찰한 이미지이다.
도 8은 비교예 1, 4, 7의 합금분말을 이용한 용사 코팅물 시편의 단면을 광학 현미경으로 관찰한 이미지(배율 200배)로서, (a)~(c)는 각각 비교예 8, 11, 14 시편의 단면을 관찰한 이미지이다.
도 9는 본 발명에 따른 실시예 2, 4, 7의 철계 비정질 합금분말을 이용한 용사 코팅물 시편의 비부식/부식된 단면을 광학 현미경으로 관찰한 이미지(배율 200배)로서, (a)~(c)는 각각 실시예 10, 12, 15 시편의 관찰 이미지이다.
도 10은 비교예 2, 4, 6의 합금분말을 이용한 용사 코팅물 시편의 비부식/부식된 단면을 광학 현미경으로 관찰한 이미지(배율 200배)로서, (a)~(c)는 각각 비교예 8, 11, 13 시편의 관찰 이미지이다.
도 11은 본 발명의 실시예 1, 6, 7의 철계 비정질 합금분말의 코팅물인 실시예 9, 14, 15의 시편과 비교예 1, 3, 5의 합금분말의 코팅물 시편인 비교예 8, 10, 12의 마찰력 측정결과를 대비한 그래프이다.
도 12는 본 발명의 실시예 7에 따른 철계 비정질 합금분말을 이용한 플라즈마 코팅물 시편(a), HVOF 코팅물 시편(b), VPS 코팅물 시편(c)의 단면을 광학 현미경으로 관찰한 이미지이다.
도 13은 본 발명의 실시예 7에 따른 철계 비정질 합금분말을 이용한 플라즈마 코팅물 시편(a), HVOF 코팅물 시편(b), VPS 코팅물 시편(c)의 XRD 그래프이다.
도 14는 본 발명의 실시예 7에 따른 철계 비정질 합금분말을 이용한 HVOF 코팅물 시편에 대한 TEM 분석 이미지와 일부 SAED 패턴 확대도를 나타내는 도면이다.
도 15는 비교예 7에 따른 철계 비정질 합금분말을 이용한 HVOF 코팅물 시편에 대한 TEM 분석 이미지와 일부 SAED 패턴 확대도를 나타내는 도면이다.
도 16은 본 발명의 실시예 7에 따른 철계 비정질 합금분말을 이용한 MIM 제품 사진과 3D 프린팅 제품 사진으로서, (a)는 MIM으로 복잡한 형상으로 제작한 제품 사진이고, (b)는 3D 프린팅을 사용하여 제작한 제품 사진, (c)는 3D 프린팅을 사용하여 입체 조각상을 제작한 제품 사진이다.
도 17은 본 발명의 실시예 7에 따른 철계 비정질 합금분말을 이용하여 3D 프린팅으로 냉각 속도를 달리하여 총 4종의 1cm3 큐브를 제조한 제품 사진과 제조된 각 큐브의 XRD 그래프이다.
구분 | 실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | 실시예6 | 실시예7 | 실시예8 |
Fe | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Cr | 0.55 | 0.26 | 0.355 | 0.292 | 0.374 | 0.355 | 0.292 | 0.374 |
Mo | 0.84 | 0.36 | 0.645 | 0.502 | 0.411 | 0.645 | 0.502 | 0.411 |
C | 0.06 | - | 0.092 | - | .056 | 0.092 | 0.080 | 0.056 |
B | - | 0.04 | - | 0.04 | - | 0.1 | 0.092 | 0.04 |
냉각속도(degree/sec) | 104 | 104 | 104 | 103 | 103 | 102 | 102 | 102 |
*분말평균직경 | 5 | 5 | 10 | 20 | 20 | 50 | 50 | 50 |
구분 | 비교예1 | 비교예2 | 비교예3 | 비교예4 | 비교예5 | 비교예6 | 비교예7 |
Fe | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Cr | 0.56 | 0.20 | 0.714 | 0.714 | 0.550 | 0.411 | 0.196 |
Mo | 0.30 | 0.85 | 0.345 | 0.245 | 0.183 | 0.374 | 0.686 |
C | - | - | 0.020 | 0.060 | 0.028 | 0.028 | 0.020 |
B | - | 0.04 | - | - | 0.073 | 0.056 | 0.059 |
냉각속도(degree/sec) | 104 | 104 | 104 | 103 | 102 | 102 | 102 |
*분말평균직경 | 5 | 5 | 10 | 20 | 50 | 50 | 50 |
구분 | area | Test value HV0.2 | Average HV0.2 |
실시예11 | 단면 | 802/754/828/765/710 | 771 |
실시예14 | 단면 | 898/834/944/848/789 | 862 |
실시예16 | 단면 | 1304/1139/1097/1194/1139 | 1174 |
비교예8 | 단면 | 669/756/623/689/683 | 684 |
비교예10 | 단면 | 928/862/876/921/802 | 877 |
비교예12 | 단면 | 828/848/1012/944/771 | 880 |
비교예14 | 단면 | 821/855/808/783/633 | 780 |
구분 | 100N, 25min | 1000N, 55min | ||
마찰계수(μ) | 평균 마찰계수(μ) | 마찰계수(μ) | 평균 마찰계수(μ) | |
실시예9 | 0.001~0.007 | 0.0044 | 0.040~0.078 | 0.0692 |
실시예14 | 0.005~0.024 | 0.0127 | 0.007~0.095 | 0.0860 |
실시예15 | 0.006~0.028 | 0.0135 | 0.007~0.098 | 0.0882 |
비교예8 | 0.030~0.054 | 0.0419 | 0.101~0.119 | 0.1123 |
비교예10 | 0.008~0.047 | 0.0196 | 0.088~0.116 | 0.0913 |
비교예12 | 0.065~0.087 | 0.0820 | 0.098~0.111 | 0.1085 |
구분 | Width/mm |
실시예9 | 0.79 |
실시예14 | 0.75 |
실시예15 | 0.71 |
비교예8 | 0.98 |
비교예10 | 1.15 |
비교예12 | 0.82 |
구분 | (a) 플라즈마 코팅 | (b) HVOF 코팅 | (c) VPS 코팅 |
두께 ㎛ | 325.6 | 192.7 | 52.1 |
기공율 % | 1.8 | 0.9 | 1.2 |
구분 | Test value HV0.2 |
(a) | 1183.9 |
(b) | 1179.4 |
(c) | 1180.1 |
(d) | 1184.5 |
Claims (16)
- 철, 크롬, 몰리브데늄을 포함하는 합금용 조성물로서,
상기 철 100 중량부에 대해서,
상기 크롬 함량은 25.4 내지 37.4 중량부,
상기 몰리브데늄 함량은 35.6 내지 84.2 중량부,
탄소와 붕소에서 선택된 적어도 1종 이상을 1.7 내지 23.7 중량부 및
텅스텐, 코발트, 이트륨, 망간, 실리콘, 알루미늄, 니오븀, 지르코늄, 인, 니켈, 스칸디움 및 이들의 혼합물로 이루어진 군으로부터 선택되는 추가성분의 총합을 1.125 중량부 미만으로 포함하고,
상기 합금용 조성물을 용융한 후 용융점에서 유리전이온도까지 101 내지 104 (degree/sec)의 냉각속도로 냉각하여 형성하는 합금분말 내의 비정질상의 비율(a)이 90 내지 100 부피% 이며,
상기 합금분말을 재용융시킨 후 용융점에서 유리전이온도까지 101 내지 104 (degree/sec)의 냉각속도로 냉각하여 제조된 합금 내의 비정질상의 비율(b)이 0.9 ≤ b/a ≤ 1을 만족하는 철계 합금용 조성물.
- 삭제
- 삭제
- 철, 크롬, 몰리브데늄을 포함하는 철계 비정질 합금분말로서,
상기 철 100 중량부에 대해서,
상기 크롬 함량은 25.4 내지 37.4 중량부,
상기 몰리브데늄 함량은 35.6 내지 84.2 중량부,
탄소와 붕소에서 선택된 적어도 1종 이상을 1.7 내지 23.7 중량부, 및
텅스텐, 코발트, 이트륨, 망간, 실리콘, 알루미늄, 니오븀, 지르코늄, 인, 니켈, 스칸디움 및 이들의 혼합물로 이루어진 군으로부터 선택되는 추가성분의 총합을 1.125 중량부 미만으로 포함하고,
상기 합금분말 내의 비정질상의 비율(a)이 90 내지 100 부피% 이며,
상기 합금분말을 재용융시킨 후 용융점에서 유리전이온도까지 101 내지 104 (degree/sec)의 냉각속도로 냉각하여 제조된 합금 내의 비정질상의 비율(b)이 0.9 ≤ b/a ≤ 1을 만족하는 철계 비정질 합금분말.
- 삭제
- 삭제
- 제4항에 있어서,
상기 합금분말의 평균입도는 10㎛ 내지 100㎛인 철계 비정질 합금분말.
- 제7항에 있어서,
상기 합금분말은 아토마이저 공법으로 제조된 철계 비정질 합금분말.
- 제4항에 있어서,
상기 합금분말은 코팅물 형성공정, 금속 분말 사출(Metal powder Injection Molding; MIM) 성형공정, 3D 프린팅 공정 및 분말 야금(Powder Metallurgy, P/M) 공정으로 구성된 군에서 선택된 적어도 하나의 공정의 재료로 사용되는 철계 비정질 합금분말.
- 제4항에 있어서,
상기 합금분말을 재료로 용사공정으로 성형체를 형성하는 경우, 상기 성형체의 비정질상의 비율은 90 내지 100 부피%인 철계 비정질 합금분말.
- 제10항에 있어서,
상기 용사공정을 HVOF (high Velocity Oxygen Fuel) 장치로 하기의 분사조건에서 수행하는 경우 제조되는 성형체의 비정질상의 비율이 95 내지 100 부피%인 철계 비정질 합금분말.
[조건]
Gun type: Hybrid, 에어 캡: 2701, LPG 유량(LPG Flow) 160 SCFH, LPG압(LPG Pressure) 90 PSI, 산소 유량(Oxygen flow) 550 SCFH, 산소압(Oxygen Pressure) 150 PSI, 기류량(Air flow) 900 SCFH, 기류압(Air Pressure) 100 PSI, 질소 유량(Nitrogen flow) 28 SCFH, 질소압(Nitrogen Pressure) 150 PSI, Gun speed: 100 m/min, Gun pitch: 3.0mm, 피더 속도(Feeder rate) 45 g/min, Stand-off distance: 250mm
- 제11항에 있어서,
상기 성형체의 비커스 경도는 700 내지 1,200 Hv(0.2)이고, 마찰계수는 100N의 하중에서 0.001μ 내지 0.08μ이거나, 1,000N의 하중에서 0.06μ 내지 0.12μ인 철계 비정질 합금분말.
- 삭제
- 제4항, 제7항 및 제8항 중 어느 한 항의 합금분말을 재료로 3D 프린팅한 성형체로서,
상기 성형체 내의 합금의 비정질상의 비율이 90 내지 100 부피%인 철계 합금 성형체.
- 제4항의 합금분말을 재료로 하여 소결한 성형체로서,
상기 성형체 내에는 보라이드, 카바이드가 각각 단독 또는 보라이드와 카바이드가 모두 포함되며, 상기 보라이드, 카바이드의 총량은 상기 철 100 중량부에 대해서, 3 내지 8 중량부로 포함되는 성형체.
- 제15항에 있어서,
상기 보라이드와 상기 카바이드는 상기 합금분말의 붕소와 탄소에서 유래한 것인 성형체.
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JP2021530339A (ja) | 2021-11-11 |
EP3804882A4 (en) | 2022-03-09 |
KR20200006944A (ko) | 2020-01-21 |
CN112739429B (zh) | 2022-08-23 |
CN112512727A (zh) | 2021-03-16 |
WO2020013632A1 (ko) | 2020-01-16 |
US11718900B2 (en) | 2023-08-08 |
SG10201906394RA (en) | 2020-02-27 |
JP7159468B2 (ja) | 2022-10-24 |
KR20200006945A (ko) | 2020-01-21 |
EP3815755A4 (en) | 2022-06-22 |
JP2021529892A (ja) | 2021-11-04 |
WO2020013633A1 (ko) | 2020-01-16 |
SG10201906391VA (en) | 2020-02-27 |
KR102272809B9 (ko) | 2022-01-24 |
CN112739429A (zh) | 2021-04-30 |
EP3804882A1 (en) | 2021-04-14 |
SG10201805971SA (en) | 2020-02-27 |
US20210291023A1 (en) | 2021-09-23 |
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