Post-heat treatment microstructural changes in nickel based HVOF coating

被引：2
|
作者：
Rodriguez, MA
Gil, L
Staia, MH
机构：
[1] Cent Univ Venezuela, Sch Mech Engn, Caracas 1041 A, Venezuela
[2] Natl Polytechn Univ Puerto Ordaz, Bolivar, Venezuela
来源：
SURFACE ENGINEERING | 2002年 / 18卷 / 05期
关键词：
D O I：
10.1179/026708402225006213
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of various heat treatments (oxyacetylene flame, argon atmosphere, vacuum) on the microstructure and hardness of thermal sprayed coatings has been studied. Commercial powder of the NiCrSiBW alloy known as Colmonoy 88 was sprayed using the HVOF (high velocity oxyfuel) process. Coatings were deposited on AISI 1020 steel substrates using a JP5000 gun. The processing parameters recommended by the powder manufacturer were employed The results indicate that post-heat treatments conducted in both vacuum and argon atmosphere produced significant changes in the morphology and distribution of the hard phases, but no noticeable changes were observed when the coatings were post-heat treated with an oxyacetylene flame. The measured microhardness values were correlated with the microstructural changes which took place during post-heat treatment.
引用
收藏
页码：358 / 362
页数：5
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