发明名称 |
Erosion resistant machine component, method for forming surface layer of machine component, and method for manufacturing steam turbine |
摘要 |
A method for forming a surface layer, the purpose thereof is to form a high erosion resistant film. The method for forming a surface layer includes: arranging a member (2) in a machining fluid (3); and forming the surface layer including silicon by spacing a silicon electrode (1) from the member (2) at a predetermined distance, and by supplying silicon component from the silicon electrode (1) to the member side by applying a predetermined voltage and generating electric discharge, and an iron-based metal texture including silicon of 3 to 11 wt % is formed at a thickness of 5 to 10 μm at a portion to be treated by repetitively generating a electric discharge pulse in which a time integration value of a current value of the electric discharge pulse is in a range of 30 A·μs to 80 A·μs. |
申请公布号 |
US9359682(B2) |
申请公布日期 |
2016.06.07 |
申请号 |
US201514679098 |
申请日期 |
2015.04.06 |
申请人 |
Mitsubishi Electric Corporation |
发明人 |
Goto Akihiro;Sumi Nobuyuki;Nakano Yoshikazu;Teramoto Hiroyuki |
分类号 |
C25D3/56;C25D5/18;C23C26/00;F01D5/28;F01D25/28 |
主分类号 |
C25D3/56 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC ;Turner Richard C. |
主权项 |
1. A method for forming a surface layer, the method comprising:
arranging a member in a machining fluid; spacing a silicon electrode from the member at a predetermined distance; and forming an iron-based metal layer including silicon on a surface of the member by supplying silicon component from the silicon electrode to the member by applying a predetermined voltage and repetitively generating electric discharge, wherein a time integration of a current value of the electric discharge pulse is ranged between 30 A·μs and 80 A·μs, and wherein the iron-based metal layer includes 3 to 11 wt % of silicon and has a thickness of 5 to 10 μm. |
地址 |
Tokyo JP |