摘要:

AbstractAISI316 stainless steel has been plasma nitrided at 570°C over a range of processing conditions, and the resultant corrosion properties have been investigated by a potentiodynamic polarization technique. X-ray diffraction and transmission electron microscopy studies have been used to map the process parameters under which a duplex surface compound layer ofγ' phase and austenite is formed. This surface compound layer has better corrosion resistance than a plasma nitrided stainless steel surface, where the normal hardened layer consists of austenite' and chromium nitride precipitates. It has been found that the improvement in corrosion resistance is related to the presence of theγ' nitride. Furthermore; low temperature plasma nitriding at 400°C produces a nitrided layer which has a corrosion resistance equivalent to that of the original material.

ISSN:0267-0844    

DOI:10.1179/sur.1985.1.2.131

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

摘要:

AbstractThis paper reviews the principles of laser melting and some of the processing techniques involved. The main aspects of the laser surface melting of cast irons, including the various microstructures and resultant properties, are discussed in detail and possible applications of laser melted components are also considered.

ISSN:0267-0844    

DOI:10.1179/sur.1985.1.2.137

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor