| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a nitride metal member including a non-conventional novel nitride layer. <P>SOLUTION: The nitride metal member includes a nitride layer formed in a surface part of a metal base material capable of being nitrided, and the nitride layer has nitrogen concentration at a part sufficiently deep from the outermost surface of the surface part of larger than or equivalent to that at the vicinity of the outermost surface. The nitride metal member can be obtained by irradiating a surface part of a metal base material, for example, comprising an iron and steel material, stainless steel material, titanium material or the like, with a high energy beam while the energy beam is relatively moved. The high energy beam is, for example, a near ultraviolet nanosecond pulse laser having a short wavelength in a near ultraviolet region and a pulse width in a range from 10 ps to 100 ns. Accordingly, a nitride layer having nitrogen concentration uniform down to a depth of 50μm or more and comprising a fine nitride structure can be formed. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
