[특허]Crack resistant hardfacing alloys

Crack resistant hardfacing alloys 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C22C-038/24 B23K-009/04 B23P-006/04 C22C-038/36 C22C-038/02 C22C-037/06 C22C-037/10 C22C-038/04 C22C-038/22 C22C-038/26 C22C-038/28 C22C-038/32 C22C-038/38 B23K-035/30 B23K-035/36 B23K-035/00 B23K-009/173 B23K-035/02 B23K-101/34
출원번호	US-0783692 (2015-06-08)
등록번호	US-10173290 (2019-01-08)
국제출원번호	PCT/US2015/034702 (2015-06-08)
국제공개번호	WO2015/191458 (2015-12-17)
발명자 / 주소	Cheney, Justin Lee
출원인 / 주소	Scoperta, Inc.
대리인 / 주소	Knobbe, Martens, Olson & Bear LLP
인용정보	피인용 횟수 : 0 인용 특허 : 113

초록 ▼

Embodiments of an alloy that can be resistant to cracking. In some embodiments, the alloy can be advantageous for use as a hardfacing alloys, in both a diluted and undiluted state. Certain microstructural, thermodynamic, and performance criteria can be met by embodiments of the alloys that may make

대표청구항 ▼

1. An article of manufacture for use as a feedstock for hardfacing weld overlay, wherein the article comprises: an alloy having-a macro-hardness of 50 HRC or greater and a high resistance to stress cracking and hot tearing when welded as a single layer or over a worn existing hardfacing layer;wherein a resultant hardfacing deposit of the alloy contains greater than 0 volume % grain boundary carbides and/or borides but less than 15 volume % grain boundary precipitates when present in a fully undiluted and a fully diluted state;wherein the maximum eutectic carbide/boride phase fraction of the alloy is about 15 mole %;wherein the minimum carbon level in the liquid of the alloy is about 0.5 wt. %; andwherein the alloy comprises a majority of Fe and, in wt. %: B: about 0.6-about 0.9;C: about 0.75-about 1.25;Cr: about 14.25-about 26; andNb+Ti+V: about 3.5-about 4.5. 2. The article of claim 1, wherein the resultant hardfacing deposit of the alloy has high abrasion resistance as characterized by an ASTM G65A mass loss of less than 0.5 grams. 3. The article of claim 1, wherein the resultant hardfacing deposit of the alloy contains both carbide and boride precipitates. 4. The article of claim 1, wherein the resultant hardfacing deposit of the alloy contains greater than 0 volume % grain boundary carbides and/or borides but less than 15 volume % grain boundary precipitates. 5. The article of claim 1, wherein the alloy further comprises, in wt. %: Mn: about 1.1;Mo: about 1; andSi: about 0.5. 6. The article of claim 1, wherein the resultant hardfacing deposit of the alloy is primarily martensitic. 7. The article of claim 1, wherein the resultant hardfacing deposit of the alloy has a matrix comprising at least about 10% by volume martensite. 8. The article of claim 1, wherein: the maximum grain boundary formation temperature gap of the alloy is about 80K; andthe alloy comprises both carbides and borides, and the carbides are thermodynamically stable at a temperature equal to or greater than about 80K below the liquid temperature of the austenite or ferrite matrix phase. 9. The article of claim 1, wherein the alloy comprises: less than 10 mole % carbides and/or borides at 1300K;at least one carbide and one boride phase at 1300K; andeutectic carbides and/or borides at no less than 80K below the liquidus temperature of the ferritic or austenitic iron matrix phase. 10. The article of claim 1, wherein the article is a welding wire. 11. The article of claim 1, wherein the article is a powder. 12. The article of claim 1, wherein the article is configured for application by thermal spray. 13. The article of claim 1, wherein the article is configured for application by welding. 14. The article of claim 1, wherein the article is configured for application by a casting process.

이 특허에 인용된 특허 (113)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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