Method for applying wear resistant coating to mechanical face seal
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16J-015/34
B22D-019/08
B22F-005/10
B22F-007/08
B62D-055/12
B62D-055/15
B62D-055/21
B62D-055/32
출원번호
US-0112613
(2011-05-20)
등록번호
US-9138805
(2015-09-22)
발명자
/ 주소
Wodrich, Timothy D.
출원인 / 주소
DEERE & COMPANY
대리인 / 주소
Buchanan Ingersoll & Rooney PC
인용정보
피인용 횟수 :
1인용 특허 :
34
초록▼
Mechanical face seal rings having a metallurgically bonded wear-resistant coating on the wear surfaces thereof and methods for forming such coated components is taught herein. The face seal rings, which can be formed of a relatively inexpensive base metal or alloy, have a hard metal alloy slurry dis
Mechanical face seal rings having a metallurgically bonded wear-resistant coating on the wear surfaces thereof and methods for forming such coated components is taught herein. The face seal rings, which can be formed of a relatively inexpensive base metal or alloy, have a hard metal alloy slurry disposed on the wear surfaces and then fused to form a metallurgical bond with the iron-based alloy. The wear-resistant coating comprises a fused, metal alloy comprising at least 60% iron, cobalt, nickel, or alloys thereof.
대표청구항▼
1. A method for producing a wear-resistant mechanical face seal ring, comprising: obtaining an uncoated metal ring, comprising: a radially inner surface;a radially outer surface forming an axially inner lip, an axially outer lip, and a groove therebetween;a coatable surface extending between an edge
1. A method for producing a wear-resistant mechanical face seal ring, comprising: obtaining an uncoated metal ring, comprising: a radially inner surface;a radially outer surface forming an axially inner lip, an axially outer lip, and a groove therebetween;a coatable surface extending between an edge of the axially inner lip and the radially inner surface;coating an exposed area of the coatable surface with a slurry comprising a fusible, hard metal alloy with at least 60% by weight of iron, cobalt, nickel, or alloys thereof in the form of a finely divided powder, polyvinyl alcohol, a suspension agent, and a deflocculant; andforming a metallurgical bond between the exposed area and the coating slurry to form a metallurgically bonded wear-resistant coating on at least a portion of said coatable surface,wherein the wear-resistant coating comprises a fused hard metal alloy comprising at least 60% by weight iron, cobalt, nickel or alloys thereof,wherein the wear-resistant coating has a Vickers hardness greater than 950 HV, andwherein the wear-resistant coating excludes carbides. 2. The method according to claim 1, wherein the uncoated metal ring comprises low, medium, or high carbon steel. 3. The method according to claim 1, further comprising lapping, grinding, polishing and/or otherwise finishing the surface of the metallurgically bonded wear-resistant coating. 4. A wear-resistant mechanical face seal ring produced by the process of claim 1. 5. A wear-resistant mechanical face seal ring, comprising: an uncoated metal ring, comprising: a radially inner surface;a radially outer surface forming an axially inner lip, an axially outer lip, and a groove therebetween;a coatable surface extending between an edge of the axially inner lip and the radially inner surface; anda metallurgically bonded wear-resistant coating on at least a portion of said coatable surface,wherein the wear-resistant coating comprises a fused hard metal alloy comprising at least 60% by weight iron, cobalt, nickel or alloys thereof,wherein the wear-resistant coating has a Vickers hardness greater than 950 HV, andwherein the coating excludes carbides. 6. The mechanical face seal ring according to claim 5, wherein the uncoated metal ring comprises low, medium, or high carbon steel. 7. The mechanical face seal ring according to claim 5, wherein the wear-resistant coating has a thickness of about 1.5 mm. 8. The mechanical face seal ring according to claim 5, wherein the metallurgically bonded wear-resistant coating forms a wear surface that diverges in the radially inward direction. 9. A mechanical face seal, comprising: first and second mechanical face seal rings according to claim 5, disposed coaxially, such that the wear-resistant coating of each are in contact over at least a portion thereof;first and second elastomeric rings disposed radially outward of said first and second mechanical face seal rings, respectively, wherein each elastomeric ring is in contact with the groove in the radially outer surface of each respective ring;first and second housing bores disposed radially outward of said first and second elastomeric rings, respectively, such that each housing bore compresses the respective elastomeric ring between an inner surface of the housing bore and said radially outer surface of said mechanical face seal ring. 10. The mechanical face seal according to claim 9, wherein the radially inner surfaces of the mechanical face seal rings define a region containing one or more lubricants.
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