FE-CR-NI-MO-C ALLOYS PRODUCED BY LASER-SURFACE ALLOYING

被引:25
作者
ANJOS, MA [1 ]
VILAR, R [1 ]
LI, R [1 ]
FERREIRA, MG [1 ]
STEEN, WM [1 ]
WATKINS, K [1 ]
机构
[1] UNIV LIVERPOOL, DEPT MECH ENGN, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND
关键词
D O I
10.1016/0257-8972(94)02268-U
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Several Fe-Cr-Ni-Mo-C alloys were produced by laser alloying on plain carbon steel substrates, using the blown powder technique. It was found that a careful selection of the laser treatment parameters results in alloyed layers free of defects and with a homogeneous chemical composition. The structures were martensitic, fully austenitic and austenitic-ferritic, depending on the chemical composition. The high cooling rates were found to affect the austenitic-ferritic structures, which showed a larger quantity of delta ferrite than that predicted by the Shaeffler diagram. Surface alloys produced by laser processing, with chemical composition similar to that of conventional austenitic stainless steels, showed better pitting corrosion resistance than their bulk counterparts produced by conventional techniques, despite their higher carbon content.
引用
收藏
页码:235 / 242
页数:8
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