UDIMET® Alloy 720 Product Introduction
UDIMET® alloy 720 is a high-strength nickel-based superalloy known for its excellent mechanical properties and resistance to high-temperature environments. This article provides a comprehensive introduction to UDIMET® alloy 720, covering its chemical composition, mechanical properties, performance at different temperatures, industry applications, shapes and sizes, production standards, welding and processing capabilities, advantages and disadvantages, and a comparison with similar alloys.
화학적 구성 요소
UDIMET® alloy 720 is primarily composed of nickel with significant additions of cobalt, chromium, iron, and other elements to enhance its mechanical and thermal properties:
| 요소 | 구성 (%) |
|---|---|
| 니켈(Ni) | 59.0 – 63.0 |
| 코발트(Co) | 17.0 – 21.0 |
| 크롬(Cr) | 15.0 – 17.0 |
| 철(Fe) | 3.0 – 5.0 |
| 몰리브덴(Mo) | 1.5 – 2.5 |
| 텅스텐(W) | 0.5 – 1.5 |
| 알루미늄(Al) | 0.5 – 1.5 |
| 티타늄(Ti) | 0.5 – 1.5 |
| 붕소(B) | 0.003 – 0.01 |
| 탄소(C) | 00.08 최대 |
기계적 성질
UDIMET® alloy 720 exhibits excellent mechanical properties suitable for high-temperature applications:
| 재산 | 값 |
|---|---|
| 인장 강도, ksi(MPa) | 170 – 190 (1172 – 1310) |
| 항복 강도(0.2% 오프셋), ksi(MPa) | 120 – 140 (827 – 965) |
| 신율(2인치 단위의 %) | 15 – 20 |
| 경도, 로크웰 C(HRC) | 35 – 40 |
성능 특성
UDIMET® alloy 720 offers several performance advantages:
- 고온 강도: Retains excellent mechanical properties at elevated temperatures up to 1000°C (1832°F).
- 산화 저항: Provides good resistance to oxidation and high-temperature corrosion in various environments.
- 크리프 저항: Exhibits high creep resistance, making it suitable for applications under constant stress at high temperatures.
산업 응용
UDIMET® alloy 720 is used in various industries requiring high performance under extreme conditions:
| 산업 분야 | 애플리케이션 |
|---|---|
| 항공우주 | Gas turbine components such as turbine blades, vanes, and discs. |
| 발전 | Gas and steam turbine components, combustion chambers, and heat exchangers. |
| 화학 처리 | Reactor vessels, heat exchangers, and pipes handling corrosive chemicals at high temperatures. |
모양과 크기
UDIMET® alloy 720 is available in various forms and sizes to meet specific application requirements:
- 양식: 시트, 플레이트, 바, 단조품, 와이어.
- 크기: 플레이트의 경우 두께 범위는 0.5mm ~ 100mm이고, 둥근 막대의 경우 직경 범위는 1mm ~ 300mm입니다.
생산 표준
UDIMET® alloy 720 conforms to international production standards ensuring quality and reliability:
| 제품 형태 | 사용 가능한 모양 | 사용 가능한 크기 | 생산 표준 |
|---|---|---|---|
| 플레이트/시트 | 시트, 플레이트 | 두께: 0.5mm – 100mm | ASTM B637, AMS 5764 |
| 바/막대 | 원형바, 사각바 | 직경: 1mm – 300mm | ASTM B637, AMS 5764 |
| 단조품 | 블록, 디스크, 링 | 크기: 맞춤형 | ASTM B637, AMS 5764 |
용접 및 가공
UDIMET® alloy 720 offers good weldability and processing characteristics:
- 용접: TIG, MIG, 저항 용접 등의 방법을 사용하여 용접할 수 있습니다. 특성을 유지하려면 예열 및 용접 후 열처리가 필요할 수 있습니다.
- 가공성: 일반적으로 초경 공구와 적절한 절삭유를 사용하여 용체화 어닐링 상태로 가공됩니다.
장점과 단점
| 측면 | 세부 |
|---|---|
| 장점 | High strength and toughness at elevated temperatures, excellent oxidation resistance, good creep resistance, and availability in various forms and sizes. |
| 단점 | 표준 니켈 합금에 비해 비용이 높으며 강도가 높고 합금 성분이 높기 때문에 특수 처리 및 취급이 필요합니다. |
유사한 합금과의 비교
UDIMET® alloy 720 (UNS N07200) is often compared with other high-strength nickel-based superalloys such as UDIMET® alloy 718 and UDIMET® alloy 625. Here’s a brief comparison:
| 합금 유형/속성 | UDIMET® 합금 720 | UDIMET® 합금 718 | UDIMET® alloy 625 |
|---|---|---|---|
| 화학적 구성 요소 | High nickel, cobalt, chromium, with additional alloying elements for high-temperature strength. | 알루미늄과 티타늄이 더 적게 첨가된 고니켈, 크롬, 니오븀입니다. | High nickel, chromium, and molybdenum with niobium and tantalum for strength and corrosion resistance. |
| 기계적 성질 | 인장강도와 항복강도가 더 높고, 고온에서 크리프 저항성이 뛰어납니다. | Lower tensile and yield strength compared to UDIMET® alloy 720, good toughness and fatigue resistance. | Lower tensile and yield strength, excellent fatigue resistance, and good corrosion resistance in various environments. |
| 애플리케이션 | 고온 강도와 내산화성이 요구되는 가스터빈, 항공우주 부품. | 항공우주 부품, 고온 볼트 및 패스너. | Chemical processing equipment, marine applications, and aerospace components requiring corrosion resistance. |
This detailed article introduces UDIMET® alloy 720, highlighting its chemical composition, mechanical properties, performance characteristics, industry applications, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and a comparison with similar alloys. Engineers and professionals seeking a robust, high-strength superalloy for demanding applications in aerospace, power generation, and chemical processing industries will find UDIMET® alloy 720 suitable for use under extreme conditions.